[Feature #19741] Sync all files in yarp

This commit is the initial sync of all files from ruby/yarp
into ruby/ruby. Notably, it does the following:

* Sync all ruby/yarp/lib/ files to ruby/ruby/lib/yarp
* Sync all ruby/yarp/src/ files to ruby/ruby/yarp/
* Sync all ruby/yarp/test/ files to ruby/ruby/test/yarp

1821 files changed, 66213 insertions, 0 deletions

diff --git a/test/yarp/comments_test.rb b/test/yarp/comments_test.rb
new file mode 100644
index 0000000000..bd8beead92
--- /dev/null
+++ b/test/yarp/comments_test.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class CommentsTest < Test::Unit::TestCase
+  include ::YARP::DSL
+
+  def test_comment_inline
+    assert_comment "# comment", :inline
+  end
+
+  def test_comment___END__
+    source = <<~RUBY
+      __END__
+      comment
+    RUBY
+
+    assert_comment source, :__END__
+  end
+
+  def test_comment_embedded_document
+    source = <<~RUBY
+      =begin
+      comment
+      =end
+    RUBY
+
+    assert_comment source, :embdoc
+  end
+
+  def test_comment_embedded_document_with_content_on_same_line
+    source = <<~RUBY
+      =begin other stuff
+      =end
+    RUBY
+
+    assert_comment source, :embdoc
+  end
+
+  private
+
+  def assert_comment(source, type)
+    result = YARP.parse(source)
+    assert result.errors.empty?, result.errors.map(&:message).join("\n")
+    result => YARP::ParseResult[comments: [YARP::Comment[type: type]]]
+  end
+end
diff --git a/test/yarp/compile_test.rb b/test/yarp/compile_test.rb
new file mode 100644
index 0000000000..d0be863db5
--- /dev/null
+++ b/test/yarp/compile_test.rb
@@ -0,0 +1,212 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class CompileTest < Test::Unit::TestCase
+  def test_AliasNode
+    assert_compiles("alias foo bar")
+  end
+
+  def test_AndNode
+    assert_compiles("true && false")
+  end
+
+  def test_ArrayNode
+    assert_compiles("[]")
+    assert_compiles("[foo, bar, baz]")
+  end
+
+  def test_AssocNode
+    assert_compiles("{ foo: bar }")
+  end
+
+  def test_BlockNode
+    assert_compiles("foo { bar }")
+  end
+
+  def test_BlockNode_with_optionals
+    assert_compiles("foo { |x = 1| bar }")
+  end
+
+  def test_CallNode
+    assert_compiles("foo")
+    assert_compiles("foo(bar)")
+  end
+
+  def test_ClassVariableReadNode
+    assert_compiles("@@foo")
+  end
+
+  def test_ClassVariableWriteNode
+    assert_compiles("@@foo = 1")
+  end
+
+  def test_FalseNode
+    assert_compiles("false")
+  end
+
+  def test_GlobalVariableReadNode
+    assert_compiles("$foo")
+  end
+
+  def test_GlobalVariableWriteNode
+    assert_compiles("$foo = 1")
+  end
+
+  def test_HashNode
+    assert_compiles("{ foo: bar }")
+  end
+
+  def test_InstanceVariableReadNode
+    assert_compiles("@foo")
+  end
+
+  def test_InstanceVariableWriteNode
+    assert_compiles("@foo = 1")
+  end
+
+  def test_IntegerNode
+    assert_compiles("1")
+    assert_compiles("1_000")
+  end
+
+  def test_InterpolatedStringNode
+    assert_compiles("\"foo \#{bar} baz\"")
+  end
+
+  def test_LocalVariableWriteNode
+    assert_compiles("foo = 1")
+  end
+
+  def test_LocalVariableReadNode
+    assert_compiles("[foo = 1, foo]")
+  end
+
+  def test_NilNode
+    assert_compiles("nil")
+  end
+
+  def test_OrNode
+    assert_compiles("true || false")
+  end
+
+  def test_ParenthesesNode
+    assert_compiles("()")
+  end
+
+  def test_ProgramNode
+    assert_compiles("")
+  end
+
+  def test_RangeNode
+    assert_compiles("foo..bar")
+    assert_compiles("foo...bar")
+    assert_compiles("(foo..)")
+    assert_compiles("(foo...)")
+    assert_compiles("(..bar)")
+    assert_compiles("(...bar)")
+  end
+
+  def test_SelfNode
+    assert_compiles("self")
+  end
+
+  def test_StringNode
+    assert_compiles("\"foo\"")
+  end
+
+  def test_SymbolNode
+    assert_compiles(":foo")
+  end
+
+  def test_TrueNode
+    assert_compiles("true")
+  end
+
+  def test_UndefNode
+    assert_compiles("undef :foo, :bar, :baz")
+  end
+
+  def test_XStringNode
+    assert_compiles("`foo`")
+  end
+
+  private
+
+  def assert_compiles(source)
+    assert_equal_iseqs(rubyvm_compile(source), YARP.compile(source))
+  end
+
+  # Instruction sequences have 13 elements in their lists. We don't currently
+  # support all of the fields, so we can't compare the iseqs directly. Instead,
+  # we compare the elements that we do support.
+  def assert_equal_iseqs(expected, actual)
+    # The first element is the magic comment string.
+    assert_equal expected[0], actual[0]
+
+    # The next three elements are the major, minor, and patch version numbers.
+    # TODO: Insert this check once Ruby 3.3 is released, and the TruffleRuby
+    # GitHub workflow also checks against Ruby 3.3
+    # assert_equal expected[1...4], actual[1...4]
+
+    # The next element is a set of options for the iseq. It has lots of
+    # different information, some of which we support and some of which we
+    # don't.
+    assert_equal expected[4][:arg_size], actual[4][:arg_size], "Unexpected difference in arg_size"
+    assert_equal expected[4][:stack_max], actual[4][:stack_max], "Unexpected difference in stack_max"
+
+    assert_kind_of Integer, actual[4][:local_size]
+    assert_kind_of Integer, actual[4][:node_id]
+
+    assert_equal expected[4][:code_location].length, actual[4][:code_location].length, "Unexpected difference in code_location length"
+    assert_equal expected[4][:node_ids].length, actual[4][:node_ids].length, "Unexpected difference in node_ids length"
+
+    # Then we have the name of the iseq, the relative file path, the absolute
+    # file path, and the line number. We don't have this working quite yet.
+    assert_kind_of String, actual[5]
+    assert_kind_of String, actual[6]
+    assert_kind_of String, actual[7]
+    assert_kind_of Integer, actual[8]
+
+    # Next we have the type of the iseq.
+    assert_equal expected[9], actual[9]
+
+    # Next we have the list of local variables. We don't support this yet.
+    assert_kind_of Array, actual[10]
+
+    # Next we have the argument options. These are used in block and method
+    # iseqs to reflect how the arguments are passed.
+    assert_equal expected[11], actual[11], "Unexpected difference in argument options"
+
+    # Next we have the catch table entries. We don't have this working yet.
+    assert_kind_of Array, actual[12]
+
+    # Finally we have the actual instructions. We support some of this, but omit
+    # line numbers and some tracepoint events.
+    expected[13].each do |insn|
+      case insn
+      in [:send, opnds, expected_block] unless expected_block.nil?
+        actual[13].shift => [:send, ^(opnds), actual_block]
+        assert_equal_iseqs expected_block, actual_block
+      in Array | :RUBY_EVENT_B_CALL | :RUBY_EVENT_B_RETURN | /^label_\d+/
+        assert_equal insn, actual[13].shift
+      in Integer | /^RUBY_EVENT_/
+        # skip these for now
+      else
+        flunk "Unexpected instruction: #{insn.inspect}"
+      end
+    end
+  end
+
+  def rubyvm_compile(source)
+    options = {
+      peephole_optimization: false,
+      specialized_instruction: false,
+      operands_unification: false,
+      instructions_unification: false,
+      frozen_string_literal: false
+    }
+
+    RubyVM::InstructionSequence.compile(source, **options).to_a
+  end
+end
diff --git a/test/yarp/encoding_test.rb b/test/yarp/encoding_test.rb
new file mode 100644
index 0000000000..02ff97f4be
--- /dev/null
+++ b/test/yarp/encoding_test.rb
@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class EncodingTest < Test::Unit::TestCase
+  %w[
+    ascii
+    ascii-8bit
+    big5
+    binary
+    euc-jp
+    gbk
+    iso-8859-1
+    iso-8859-2
+    iso-8859-3
+    iso-8859-4
+    iso-8859-5
+    iso-8859-6
+    iso-8859-7
+    iso-8859-8
+    iso-8859-9
+    iso-8859-10
+    iso-8859-11
+    iso-8859-13
+    iso-8859-14
+    iso-8859-15
+    iso-8859-16
+    koi8-r
+    shift_jis
+    sjis
+    us-ascii
+    utf-8
+    windows-31j
+    windows-1251
+    windows-1252
+    CP1251
+    CP1252
+  ].each do |encoding|
+    define_method "test_encoding_#{encoding}" do
+      result = YARP.parse("# encoding: #{encoding}\nident")
+      actual = result.value.statements.body.first.name.encoding
+      assert_equal Encoding.find(encoding), actual
+    end
+  end
+
+  def test_coding
+    result = YARP.parse("# coding: utf-8\nident")
+    actual = result.value.statements.body.first.name.encoding
+    assert_equal Encoding.find("utf-8"), actual
+  end
+
+  def test_emacs_style
+    result = YARP.parse("# -*- coding: utf-8 -*-\nident")
+    actual = result.value.statements.body.first.name.encoding
+    assert_equal Encoding.find("utf-8"), actual
+  end
+
+  def test_utf_8_variations
+    %w[
+      utf-8-unix
+      utf-8-dos
+      utf-8-mac
+      utf-8-*
+    ].each do |encoding|
+      result = YARP.parse("# coding: #{encoding}\nident")
+      actual = result.value.statements.body.first.name.encoding
+      assert_equal Encoding.find("utf-8"), actual
+    end
+  end
+end
diff --git a/test/yarp/errors_test.rb b/test/yarp/errors_test.rb
new file mode 100644
index 0000000000..4e5f8cb936
--- /dev/null
+++ b/test/yarp/errors_test.rb
@@ -0,0 +1,984 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class ErrorsTest < Test::Unit::TestCase
+  include ::YARP::DSL
+
+  def test_constant_path_with_invalid_token_after
+    assert_error_messages "A::$b", [
+      "Expected identifier or constant after '::'",
+      "Expected a newline or semicolon after statement."
+    ]
+  end
+
+  def test_module_name_recoverable
+    expected = ModuleNode(
+      [],
+      Location(),
+      ConstantReadNode(),
+      StatementsNode(
+        [ModuleNode([], Location(), MissingNode(), nil, Location())]
+      ),
+      Location()
+    )
+
+    assert_errors expected, "module Parent module end", [
+      "Expected to find a module name after `module`."
+    ]
+  end
+
+  def test_for_loops_index_missing
+    expected = ForNode(
+      MissingNode(),
+      expression("1..10"),
+      StatementsNode([expression("i")]),
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "for in 1..10\ni\nend", ["Expected index after for."]
+  end
+
+  def test_for_loops_only_end
+    expected = ForNode(
+      MissingNode(),
+      MissingNode(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "for end", ["Expected index after for.", "Expected keyword in.", "Expected collection."]
+  end
+
+  def test_pre_execution_missing_brace
+    expected = PreExecutionNode(
+      StatementsNode([expression("1")]),
+      Location(),
+      Location(),
+      Location()
+    )
+
+    assert_errors expected, "BEGIN 1 }", ["Expected '{' after 'BEGIN'."]
+  end
+
+  def test_pre_execution_context
+    expected = PreExecutionNode(
+      StatementsNode([
+        CallNode(
+          expression("1"),
+          nil,
+          Location(),
+          nil,
+          ArgumentsNode([MissingNode()]),
+          nil,
+          nil,
+          0,
+          "+"
+        )
+      ]),
+      Location(),
+      Location(),
+      Location()
+    )
+
+    assert_errors expected, "BEGIN { 1 + }", ["Expected a value after the operator."]
+  end
+
+  def test_unterminated_embdoc
+    assert_errors expression("1"), "1\n=begin\n", ["Unterminated embdoc"]
+  end
+
+  def test_unterminated_i_list
+    assert_errors expression("%i["), "%i[", ["Expected a closing delimiter for a `%i` list."]
+  end
+
+  def test_unterminated_w_list
+    assert_errors expression("%w["), "%w[", ["Expected a closing delimiter for a `%w` list."]
+  end
+
+  def test_unterminated_W_list
+    assert_errors expression("%W["), "%W[", ["Expected a closing delimiter for a `%W` list."]
+  end
+
+  def test_unterminated_regular_expression
+    assert_errors expression("/hello"), "/hello", ["Expected a closing delimiter for a regular expression."]
+  end
+
+  def test_unterminated_xstring
+    assert_errors expression("`hello"), "`hello", ["Expected a closing delimiter for an xstring."]
+  end
+
+  def test_unterminated_string
+    assert_errors expression('"hello'), '"hello', ["Expected a closing delimiter for an interpolated string."]
+  end
+
+  def test_unterminated_s_symbol
+    assert_errors expression("%s[abc"), "%s[abc", ["Expected a closing delimiter for a dynamic symbol."]
+  end
+
+  def test_unterminated_parenthesized_expression
+    assert_errors expression('(1 + 2'), '(1 + 2', ["Expected to be able to parse an expression.", "Expected a closing parenthesis."]
+  end
+
+  def test_1_2_3
+    assert_errors expression("(1, 2, 3)"), "(1, 2, 3)", [
+      "Expected to be able to parse an expression.",
+      "Expected a closing parenthesis.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression."
+    ]
+  end
+
+  def test_return_1_2_3
+    assert_error_messages "return(1, 2, 3)", [
+      "Expected to be able to parse an expression.",
+      "Expected a closing parenthesis.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression."
+    ]
+  end
+
+  def test_return_1
+    assert_errors expression("return 1,;"), "return 1,;", ["Expected to be able to parse an argument."]
+  end
+
+  def test_next_1_2_3
+    assert_errors expression("next(1, 2, 3)"), "next(1, 2, 3)", [
+      "Expected to be able to parse an expression.",
+      "Expected a closing parenthesis.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression."
+    ]
+  end
+
+  def test_next_1
+    assert_errors expression("next 1,;"), "next 1,;", ["Expected to be able to parse an argument."]
+  end
+
+  def test_break_1_2_3
+    errors = [
+      "Expected to be able to parse an expression.",
+      "Expected a closing parenthesis.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression."
+    ]
+
+    assert_errors expression("break(1, 2, 3)"), "break(1, 2, 3)", errors
+  end
+
+  def test_break_1
+    assert_errors expression("break 1,;"), "break 1,;", ["Expected to be able to parse an argument."]
+  end
+
+  def test_argument_forwarding_when_parent_is_not_forwarding
+    assert_errors expression('def a(x, y, z); b(...); end'), 'def a(x, y, z); b(...); end', ["unexpected ... when parent method is not forwarding."]
+  end
+
+  def test_argument_forwarding_only_effects_its_own_internals
+    assert_errors expression('def a(...); b(...); end; def c(x, y, z); b(...); end'), 'def a(...); b(...); end; def c(x, y, z); b(...); end', ["unexpected ... when parent method is not forwarding."]
+  end
+
+  def test_top_level_constant_with_downcased_identifier
+    assert_error_messages "::foo", [
+      "Expected a constant after ::.",
+      "Expected a newline or semicolon after statement."
+    ]
+  end
+
+  def test_top_level_constant_starting_with_downcased_identifier
+    assert_error_messages "::foo::A", [
+      "Expected a constant after ::.",
+      "Expected a newline or semicolon after statement."
+    ]
+  end
+
+  def test_aliasing_global_variable_with_non_global_variable
+    assert_errors expression("alias $a b"), "alias $a b", ["Expected a global variable."]
+  end
+
+  def test_aliasing_non_global_variable_with_global_variable
+    assert_errors expression("alias a $b"), "alias a $b", ["Expected a bare word or symbol argument."]
+  end
+
+  def test_aliasing_global_variable_with_global_number_variable
+    assert_errors expression("alias $a $1"), "alias $a $1", ["Can't make alias for number variables."]
+  end
+
+  def test_def_with_expression_receiver_and_no_identifier
+    assert_errors expression("def (a); end"), "def (a); end", [
+      "Expected '.' or '::' after receiver"
+    ]
+  end
+
+  def test_def_with_multiple_statements_receiver
+    assert_errors expression("def (\na\nb\n).c; end"), "def (\na\nb\n).c; end", [
+      "Expected closing ')' for receiver.",
+      "Expected '.' or '::' after receiver",
+      "Expected to be able to parse an expression.",
+      "Expected to be able to parse an expression."
+    ]
+  end
+
+  def test_def_with_empty_expression_receiver
+    assert_errors expression("def ().a; end"), "def ().a; end", ["Expected to be able to parse receiver."]
+  end
+
+  def test_block_beginning_with_brace_and_ending_with_end
+    assert_error_messages "x.each { x end", [
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression.",
+      "Expected to be able to parse an expression.",
+      "Expected block beginning with '{' to end with '}'."
+    ]
+  end
+
+  def test_double_splat_followed_by_splat_argument
+    expected = CallNode(
+      nil,
+      nil,
+      Location(),
+      Location(),
+      ArgumentsNode(
+        [KeywordHashNode(
+           [AssocSplatNode(
+              CallNode(
+                nil,
+                nil,
+                Location(),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "kwargs"
+              ),
+              Location()
+            )]
+         ),
+         SplatNode(
+           Location(),
+           CallNode(nil, nil, Location(), nil, nil, nil, nil, 0, "args")
+         )]
+      ),
+      Location(),
+      nil,
+      0,
+      "a"
+    )
+
+    assert_errors expected, "a(**kwargs, *args)", ["Unexpected splat argument after double splat."]
+  end
+
+  def test_arguments_after_block
+    expected = CallNode(
+      nil,
+      nil,
+      Location(),
+      Location(),
+      ArgumentsNode([
+        BlockArgumentNode(expression("block"), Location()),
+        expression("foo")
+      ]),
+      Location(),
+      nil,
+      0,
+      "a"
+    )
+
+    assert_errors expected, "a(&block, foo)", ["Unexpected argument after block argument."]
+  end
+
+  def test_arguments_binding_power_for_and
+    assert_error_messages "foo(*bar and baz)", [
+      "Expected a ')' to close the argument list.",
+      "Expected a newline or semicolon after statement.",
+      "Expected to be able to parse an expression."
+    ]
+  end
+
+  def test_splat_argument_after_keyword_argument
+    expected = CallNode(
+      nil,
+      nil,
+      Location(),
+      Location(),
+      ArgumentsNode(
+        [KeywordHashNode(
+           [AssocNode(
+              SymbolNode(nil, Location(), Location(), "foo"),
+              CallNode(nil, nil, Location(), nil, nil, nil, nil, 0, "bar"),
+              nil
+            )]
+         ),
+         SplatNode(
+           Location(),
+           CallNode(nil, nil, Location(), nil, nil, nil, nil, 0, "args")
+         )]
+      ),
+      Location(),
+      nil,
+      0,
+      "a"
+    )
+
+    assert_errors expected, "a(foo: bar, *args)", ["Unexpected splat argument after double splat."]
+  end
+
+  def test_module_definition_in_method_body
+    expected = DefNode(
+      Location(),
+      nil,
+      nil,
+      StatementsNode([ModuleNode([], Location(), ConstantReadNode(), nil, Location())]),
+      [],
+      Location(),
+      nil,
+      nil,
+      nil,
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo;module A;end;end", ["Module definition in method body"]
+  end
+
+  def test_module_definition_in_method_body_within_block
+    expected = DefNode(
+      Location(),
+      nil,
+      nil,
+      StatementsNode(
+        [CallNode(
+           nil,
+           nil,
+           Location(),
+           nil,
+           nil,
+           nil,
+           BlockNode(
+             [],
+             nil,
+             StatementsNode([ModuleNode([], Location(), ConstantReadNode(), nil, Location())]),
+             Location(),
+             Location()
+           ),
+           0,
+           "bar"
+         )]
+      ),
+      [],
+      Location(),
+      nil,
+      nil,
+      nil,
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "
+      def foo
+        bar do
+          module Foo;end
+        end
+      end
+    ", ["Module definition in method body"]
+  end
+
+  def test_class_definition_in_method_body
+    expected = DefNode(
+      Location(),
+      nil,
+      nil,
+      StatementsNode(
+        [ClassNode(
+           [],
+           Location(),
+           ConstantReadNode(),
+           nil,
+           nil,
+           nil,
+           Location()
+         )]
+      ),
+      [],
+      Location(),
+      nil,
+      nil,
+      nil,
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo;class A;end;end", ["Class definition in method body"]
+  end
+
+  def test_bad_arguments
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([], [], [], nil, [], nil, nil),
+      nil,
+      [],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(A, @a, $A, @@a);end", [
+      "Formal argument cannot be a constant",
+      "Formal argument cannot be an instance variable",
+      "Formal argument cannot be a global variable",
+      "Formal argument cannot be a class variable",
+    ]
+  end
+
+  def test_cannot_assign_to_a_reserved_numbered_parameter
+    expected = BeginNode(
+      Location(),
+      StatementsNode([
+        LocalVariableWriteNode(:_1, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_2, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_3, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_4, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_5, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_6, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_7, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_8, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_9, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location()),
+        LocalVariableWriteNode(:_10, 0, SymbolNode(Location(), Location(), nil, "a"), Location(), Location())
+      ]),
+      nil,
+      nil,
+      nil,
+      Location()
+    )
+
+    assert_errors expected, <<~RUBY, Array.new(9, "reserved for numbered parameter")
+    begin
+      _1=:a;_2=:a;_3=:a;_4=:a;_5=:a
+      _6=:a;_7=:a;_8=:a;_9=:a;_10=:a
+    end
+    RUBY
+  end
+
+  def test_do_not_allow_trailing_commas_in_method_parameters
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [RequiredParameterNode(:a), RequiredParameterNode(:b), RequiredParameterNode(:c)],
+        [],
+        [],
+        nil,
+        [],
+        nil,
+        nil
+      ),
+      nil,
+      [:a, :b, :c],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(a,b,c,);end", [
+      "Unexpected ','."
+    ]
+  end
+
+  def test_do_not_allow_trailing_commas_in_lambda_parameters
+    expected = LambdaNode(
+      [:a, :b],
+      Location(),
+      BlockParametersNode(
+        ParametersNode([RequiredParameterNode(:a), RequiredParameterNode(:b)], [], [], nil, [], nil, nil),
+        [],
+        Location(),
+        Location()
+      ),
+      nil
+    )
+    assert_errors expected, "-> (a, b, ) {}", [
+      "Unexpected ','."
+    ]
+  end
+
+  def test_do_not_allow_multiple_codepoints_in_a_single_character_literal
+    expected = StringNode(Location(), Location(), nil, "\u0001\u0002")
+
+    assert_errors expected, '?\u{0001 0002}', [
+      "Multiple codepoints at single character literal"
+    ]
+  end
+
+  def test_do_not_allow_more_than_6_hexadecimal_digits_in_u_Unicode_character_notation
+    expected = StringNode(Location(), Location(), Location(), "\u0001")
+
+    assert_errors expected, '"\u{0000001}"', [
+      "invalid Unicode escape.",
+      "invalid Unicode escape."
+    ]
+  end
+
+  def test_do_not_allow_characters_other_than_0_9_a_f_and_A_F_in_u_Unicode_character_notation
+    expected = StringNode(Location(), Location(), Location(), "\u0000z}")
+
+    assert_errors expected, '"\u{000z}"', [
+      "unterminated Unicode escape",
+      "unterminated Unicode escape"
+    ]
+  end
+
+  def test_method_parameters_after_block
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [RequiredParameterNode(:a)],
+        nil,
+        [],
+        nil,
+        BlockParameterNode(Location(), Location())
+      ),
+      nil,
+      [:block, :a],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+    assert_errors expected, "def foo(&block, a)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_method_with_arguments_after_anonymous_block
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([], [], [RequiredParameterNode(:a)], nil, [], nil, BlockParameterNode(nil, Location())),
+      nil,
+      [:&, :a],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(&, a)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_method_parameters_after_arguments_forwarding
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [RequiredParameterNode(:a)],
+        nil,
+        [],
+        ForwardingParameterNode(),
+        nil
+      ),
+      nil,
+      [:"...", :a],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+    assert_errors expected, "def foo(..., a)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_keywords_parameters_before_required_parameters
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [RequiredParameterNode(:a)],
+        nil,
+        [KeywordParameterNode(Location(), nil)],
+        nil,
+        nil
+      ),
+      nil,
+      [:b, :a],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+    assert_errors expected, "def foo(b:, a)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_rest_keywords_parameters_before_required_parameters
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [],
+        nil,
+        [KeywordParameterNode(Location(), nil)],
+        KeywordRestParameterNode(Location(), Location()),
+        nil
+      ),
+      nil,
+      [:rest, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+    assert_errors expected, "def foo(**rest, b:)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_double_arguments_forwarding
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([], [], [], nil, [], ForwardingParameterNode(), nil),
+      nil,
+      [:"..."],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(..., ...)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_multiple_error_in_parameters_order
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [RequiredParameterNode(:a)],
+        nil,
+        [KeywordParameterNode(Location(), nil)],
+        KeywordRestParameterNode(Location(), Location()),
+        nil
+      ),
+      nil,
+      [:args, :a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(**args, a, b:)\nend", ["Unexpected parameter order", "Unexpected parameter order"]
+  end
+
+  def test_switching_to_optional_arguments_twice
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [RequiredParameterNode(:a)],
+        nil,
+        [KeywordParameterNode(Location(), nil)],
+        KeywordRestParameterNode(Location(), Location()),
+        nil
+      ),
+      nil,
+      [:args, :a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location(),
+    )
+
+    assert_errors expected, "def foo(**args, a, b:)\nend", ["Unexpected parameter order", "Unexpected parameter order"]
+  end
+
+  def test_switching_to_named_arguments_twice
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [],
+        [],
+        [RequiredParameterNode(:a)],
+        nil,
+        [KeywordParameterNode(Location(), nil)],
+        KeywordRestParameterNode(Location(), Location()),
+        nil
+      ),
+      nil,
+      [:args, :a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location(),
+    )
+
+    assert_errors expected, "def foo(**args, a, b:)\nend", ["Unexpected parameter order", "Unexpected parameter order"]
+  end
+
+  def test_returning_to_optional_parameters_multiple_times
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode(
+        [RequiredParameterNode(:a)],
+        [
+          OptionalParameterNode(:b, Location(), Location(), IntegerNode()),
+          OptionalParameterNode(:d, Location(), Location(), IntegerNode())
+        ],
+        [RequiredParameterNode(:c), RequiredParameterNode(:e)],
+        nil,
+        [],
+        nil,
+        nil
+      ),
+      nil,
+      [:a, :b, :c, :d, :e],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location(),
+    )
+
+    assert_errors expected, "def foo(a, b = 1, c, d = 2, e)\nend", ["Unexpected parameter order"]
+  end
+
+  def test_case_without_when_clauses_errors_on_else_clause
+    expected = CaseNode(
+      SymbolNode(Location(), Location(), nil, "a"),
+      [],
+      ElseNode(Location(), nil, Location()),
+      Location(),
+      Location()
+    )
+
+    assert_errors expected, "case :a\nelse\nend", ["Unexpected else without no when clauses in case statement."]
+  end
+
+  def test_setter_method_cannot_be_defined_in_an_endless_method_definition
+    expected = DefNode(
+      Location(),
+      nil,
+      nil,
+      StatementsNode([IntegerNode()]),
+      [],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      Location(),
+      nil
+    )
+
+    assert_errors expected, "def a=() = 42", ["Setter method cannot be defined in an endless method definition"]
+  end
+
+  def test_do_not_allow_forward_arguments_in_lambda_literals
+    expected = LambdaNode(
+      [:"..."],
+      Location(),
+      BlockParametersNode(ParametersNode([], [], [], nil, [], ForwardingParameterNode(), nil), [], Location(), Location()),
+      nil
+    )
+
+    assert_errors expected, "->(...) {}", ["Unexpected ..."]
+  end
+
+  def test_do_not_allow_forward_arguments_in_blocks
+    expected = CallNode(
+      nil,
+      nil,
+      Location(),
+      nil,
+      nil,
+      nil,
+      BlockNode(
+        [:"..."],
+        BlockParametersNode(ParametersNode([], [], [], nil, [], ForwardingParameterNode(), nil), [], Location(), Location()),
+        nil,
+        Location(),
+        Location()
+      ),
+      0,
+      "a"
+    )
+
+    assert_errors expected, "a {|...|}", ["Unexpected ..."]
+  end
+
+  def test_dont_allow_return_inside_class_body
+    expected = ClassNode(
+      [],
+      Location(),
+      ConstantReadNode(),
+      nil,
+      nil,
+      StatementsNode([ReturnNode(Location(), nil)]),
+      Location()
+    )
+
+    assert_errors expected, "class A; return; end", ["Invalid return in class/module body"]
+  end
+
+  def test_dont_allow_return_inside_module_body
+    expected = ModuleNode(
+      [],
+      Location(),
+      ConstantReadNode(),
+      StatementsNode([ReturnNode(Location(), nil)]),
+      Location()
+    )
+
+    assert_errors expected, "module A; return; end", ["Invalid return in class/module body"]
+  end
+
+  def test_dont_allow_setting_to_back_and_nth_reference
+    expected = BeginNode(
+      Location(),
+      StatementsNode([
+        GlobalVariableWriteNode(Location(), Location(), NilNode()),
+        GlobalVariableWriteNode(Location(), Location(), NilNode())
+      ]),
+      nil,
+      nil,
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "begin\n$+ = nil\n$1466 = nil\nend", ["Can't set variable", "Can't set variable"]
+  end
+
+  def test_duplicated_parameter_names
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([RequiredParameterNode(:a), RequiredParameterNode(:b), RequiredParameterNode(:a)], [], [], nil, [], nil, nil),
+      nil,
+      [:a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(a,b,a);end", ["Duplicated parameter name."]
+
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([RequiredParameterNode(:a), RequiredParameterNode(:b)], [], [], RestParameterNode(Location(), Location()), [], nil, nil),
+      nil,
+      [:a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(a,b,*a);end", ["Duplicated parameter name."]
+
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([RequiredParameterNode(:a), RequiredParameterNode(:b)], [], [], nil, [], KeywordRestParameterNode(Location(), Location()), nil),
+      nil,
+      [:a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(a,b,**a);end", ["Duplicated parameter name."]
+
+    expected = DefNode(
+      Location(),
+      nil,
+      ParametersNode([RequiredParameterNode(:a), RequiredParameterNode(:b)], [], [], nil, [], nil, BlockParameterNode(Location(), Location())),
+      nil,
+      [:a, :b],
+      Location(),
+      nil,
+      Location(),
+      Location(),
+      nil,
+      Location()
+    )
+
+    assert_errors expected, "def foo(a,b,&a);end", ["Duplicated parameter name."]
+  end
+
+  private
+
+  def assert_errors(expected, source, errors)
+    assert_nil Ripper.sexp_raw(source)
+
+    result = YARP.parse(source)
+    result => YARP::ParseResult[value: YARP::ProgramNode[statements: YARP::StatementsNode[body: [*, node]]]]
+
+    assert_equal_nodes(expected, node, compare_location: false)
+    assert_equal(errors, result.errors.map(&:message))
+  end
+
+  def assert_error_messages(source, errors)
+    assert_nil Ripper.sexp_raw(source)
+    result = YARP.parse(source)
+    assert_equal(errors, result.errors.map(&:message))
+  end
+
+  def expression(source)
+    YARP.parse(source) => YARP::ParseResult[value: YARP::ProgramNode[statements: YARP::StatementsNode[body: [*, node]]]]
+    node
+  end
+end
diff --git a/test/yarp/fixtures/alias.txt b/test/yarp/fixtures/alias.txt
new file mode 100644
index 0000000000..376dacd7cc
--- /dev/null
+++ b/test/yarp/fixtures/alias.txt
@@ -0,0 +1,23 @@
+alias :foo :bar
+
+alias %s[abc] %s[def]
+
+alias :'abc' :'def'
+
+alias :"abc#{1}" :'def'
+
+alias $a $'
+
+alias foo bar
+
+alias $foo $bar
+
+alias foo if
+
+alias foo <=>
+
+alias :== :eql?
+
+alias A B
+
+alias :A :B
diff --git a/test/yarp/fixtures/arithmetic.txt b/test/yarp/fixtures/arithmetic.txt
new file mode 100644
index 0000000000..6f86f92d47
--- /dev/null
+++ b/test/yarp/fixtures/arithmetic.txt
@@ -0,0 +1,8 @@
+foo !bar
+
+-foo*bar
+
++foo**bar
+
+foo ~bar
+
diff --git a/test/yarp/fixtures/arrays.txt b/test/yarp/fixtures/arrays.txt
new file mode 100644
index 0000000000..e277ad5b34
--- /dev/null
+++ b/test/yarp/fixtures/arrays.txt
@@ -0,0 +1,80 @@
+[*a]
+
+foo[bar, baz] = 1, 2, 3
+
+[a: [:b, :c]]
+
+
+
+[:a, :b,
+:c,1,
+
+
+
+:d,
+]
+
+
+[:a, :b,
+:c,1,
+
+
+
+:d
+
+
+]
+
+[foo => bar]
+
+foo[bar][baz] = qux
+
+foo[bar][baz]
+
+[
+]
+
+foo[bar, baz]
+
+foo[bar, baz] = qux
+
+foo[0], bar[0] = 1, 2
+
+foo[bar[baz] = qux]
+
+foo[bar]
+
+foo[bar] = baz
+
+[**{}]
+
+[**kw]
+
+[1, **kw]
+
+[1, **kw, **{}, **kw]
+
+[
+  foo => bar,
+]
+
+
+%i#one two three#
+
+%w#one two three#
+
+%x#one two three#
+
+
+%i@one two three@
+
+%w@one two three@
+
+%x@one two three@
+
+
+%i{one two three}
+
+%w{one two three}
+
+%x{one two three}
diff --git a/test/yarp/fixtures/begin_ensure.txt b/test/yarp/fixtures/begin_ensure.txt
new file mode 100644
index 0000000000..1c6f9dac35
--- /dev/null
+++ b/test/yarp/fixtures/begin_ensure.txt
@@ -0,0 +1,14 @@
+begin
+a
+ensure
+b
+end
+
+begin; a; ensure; b; end
+
+begin a
+ ensure b
+ end
+
+begin a; ensure b; end
+
diff --git a/test/yarp/fixtures/begin_rescue.txt b/test/yarp/fixtures/begin_rescue.txt
new file mode 100644
index 0000000000..0a56fbef9f
--- /dev/null
+++ b/test/yarp/fixtures/begin_rescue.txt
@@ -0,0 +1,79 @@
+begin; a; rescue; b; else; c; end
+
+begin; a; rescue; b; else; c; ensure; d; end
+
+begin
+a
+end
+
+begin; a; end
+
+begin a
+ end
+
+begin a; end
+
+begin
+a
+rescue
+b
+rescue
+c
+rescue
+d
+end
+
+begin
+  a
+rescue Exception => ex
+  b
+rescue AnotherException, OneMoreException => ex
+  c
+end
+
+begin
+  a
+rescue Exception => ex
+  b
+ensure
+  b
+end
+
+%!abc!
+
+begin
+a
+rescue
+b
+end
+
+begin;a;rescue;b;end
+
+begin
+a;rescue
+b;end
+
+begin
+a
+rescue Exception
+b
+end
+
+begin
+a
+rescue Exception, CustomException
+b
+end
+
+begin
+  a
+rescue Exception, CustomException => ex
+  b
+end
+
+begin
+  a
+rescue Exception => ex
+  b
+end
+
diff --git a/test/yarp/fixtures/blocks.txt b/test/yarp/fixtures/blocks.txt
new file mode 100644
index 0000000000..e33d95c150
--- /dev/null
+++ b/test/yarp/fixtures/blocks.txt
@@ -0,0 +1,54 @@
+foo[bar] { baz }
+
+foo[bar] do
+baz
+end
+
+x.reduce(0) { |x, memo| memo += x }
+
+foo do end
+
+foo bar, (baz do end)
+
+foo bar do end
+
+foo bar baz do end
+
+foo do |a = b[1]|
+end
+
+foo do
+rescue
+end
+
+foo do
+  bar do
+    baz do
+    end
+  end
+end
+
+foo[bar] { baz }
+
+foo { |x, y = 2, z:| x }
+
+foo { |x| }
+
+fork = 1
+fork do |a|
+end
+
+fork { |a| }
+
+C do
+end
+
+C {}
+
+foo lambda { |
+  a: 1,
+  b: 2
+  |
+}
+
+foo do |bar,| end
diff --git a/test/yarp/fixtures/boolean_operators.txt b/test/yarp/fixtures/boolean_operators.txt
new file mode 100644
index 0000000000..dd0b9c9f01
--- /dev/null
+++ b/test/yarp/fixtures/boolean_operators.txt
@@ -0,0 +1,5 @@
+a &&= b
+
+a += b
+
+a ||= b
diff --git a/test/yarp/fixtures/booleans.txt b/test/yarp/fixtures/booleans.txt
new file mode 100644
index 0000000000..d9417254b6
--- /dev/null
+++ b/test/yarp/fixtures/booleans.txt
@@ -0,0 +1,3 @@
+false
+
+true
diff --git a/test/yarp/fixtures/break.txt b/test/yarp/fixtures/break.txt
new file mode 100644
index 0000000000..61859d8a8a
--- /dev/null
+++ b/test/yarp/fixtures/break.txt
@@ -0,0 +1,25 @@
+break
+
+break (1), (2), (3)
+
+break 1
+
+break 1, 2,
+3
+
+break 1, 2, 3
+
+break [1, 2, 3]
+
+break(
+  1
+  2
+)
+
+break()
+
+break(1)
+
+foo { break 42 } == 42
+
+foo { |a| break } == 42
diff --git a/test/yarp/fixtures/case.txt b/test/yarp/fixtures/case.txt
new file mode 100644
index 0000000000..76d11313ee
--- /dev/null
+++ b/test/yarp/fixtures/case.txt
@@ -0,0 +1,30 @@
+case :hi
+when :hi
+end
+
+case true; when true; puts :hi; when false; puts :bye; end
+
+case; when *foo; end
+
+case :hi
+when :hi
+else
+:b
+end
+
+case this; when FooBar, BazBonk; end
+
+case
+when foo == bar
+end
+
+case
+when a
+else
+  # empty
+end
+
+case type;
+  ;when :b;
+  ;  else;
+   end
diff --git a/test/yarp/fixtures/classes.txt b/test/yarp/fixtures/classes.txt
new file mode 100644
index 0000000000..056cb00e82
--- /dev/null
+++ b/test/yarp/fixtures/classes.txt
@@ -0,0 +1,35 @@
+class A a = 1 end
+
+class A; ensure; end
+
+class A; rescue; else; ensure; end
+
+class A < B
+a = 1
+end
+
+class << not foo
+end
+
+class A; class << self; ensure; end; end
+
+class A; class << self; rescue; else; ensure; end; end
+
+class << foo.bar
+end
+
+class << foo.bar;end
+
+class << self
+end
+
+class << self;end
+
+class << self
+1 + 2
+end
+
+class << self;1 + 2;end
+
+class A < B[1]
+end
diff --git a/test/yarp/fixtures/comments.txt b/test/yarp/fixtures/comments.txt
new file mode 100644
index 0000000000..9bd853e927
--- /dev/null
+++ b/test/yarp/fixtures/comments.txt
@@ -0,0 +1,24 @@
+a
+ # Comment
+b
+
+c # Comment
+d
+
+e
+# Comment
+  .f
+
+g
+ # Comment
+.h
+
+i # Comment
+.j
+
+k # Comment
+  .l
+
+m
+ # Comment
+  &.n
diff --git a/test/yarp/fixtures/constants.txt b/test/yarp/fixtures/constants.txt
new file mode 100644
index 0000000000..8c7c6d227b
--- /dev/null
+++ b/test/yarp/fixtures/constants.txt
@@ -0,0 +1,169 @@
+A::B
+
+A::B::C
+
+a::B
+
+A::B = 1
+
+A = 1
+
+ABC
+
+Foo 1
+
+::A::foo
+
+::A = 1
+
+::A::B = 1
+
+::A::B
+
+::A
+
+A::false
+
+A::B::true
+
+A::&
+
+A::`
+
+A::!
+
+A::!=
+
+A::^
+
+A::==
+
+A::===
+
+A::=~
+
+A::>
+
+A::>=
+
+A::>>
+
+A::<<
+
+A::\
+
+A::alias
+
+A::and
+
+A::begin
+
+A::BEGIN
+
+A::break
+
+A::class
+
+A::def
+
+A::defined
+
+A::do
+
+A::else
+
+A::elsif
+
+A::end
+
+A::END
+
+A::ensure
+
+A::false
+
+A::for
+
+A::if
+
+A::in
+
+A::next
+
+A::nil
+
+A::not
+
+A::or
+
+A::redo
+
+A::rescue
+
+A::retry
+
+A::return
+
+A::self
+
+A::super
+
+A::then
+
+A::true
+
+A::undef
+
+A::unless
+
+A::until
+
+A::when
+
+A::while
+
+A::yield
+
+A::__ENCODING__
+
+A::__FILE__
+
+A::__LINE__
+
+A::<
+
+A::<=>
+
+A::<<
+
+A::-
+
+A::%
+
+A::%i
+
+A::%w
+
+A::%x
+
+A::%I
+
+A::%W
+
+A::|
+
+A::+
+
+A::/
+
+A::*
+
+A::**
+
+A::~
+
+A::_::
+
+A::_..
+
+A::__END__
diff --git a/test/yarp/fixtures/dash_heredocs.txt b/test/yarp/fixtures/dash_heredocs.txt
new file mode 100644
index 0000000000..a05df93023
--- /dev/null
+++ b/test/yarp/fixtures/dash_heredocs.txt
@@ -0,0 +1,44 @@
+<<-EOF
+  a
+EOF
+
+<<-FIRST + <<-SECOND
+  a
+FIRST
+  b
+SECOND
+
+<<-`EOF`
+  a
+#{b}
+EOF
+
+<<-EOF #comment
+  a
+EOF
+
+<<-EOF
+  a
+  b
+  EOF
+
+<<-"EOF"
+  a
+#{b}
+EOF
+
+<<-EOF
+  a
+#{b}
+EOF
+
+%#abc#
+
+<<-EOF
+  a
+  b
+EOF
+
+<<-'EOF'
+  a #{1}
+EOF
diff --git a/test/yarp/fixtures/defined.txt b/test/yarp/fixtures/defined.txt
new file mode 100644
index 0000000000..9cf153a853
--- /dev/null
+++ b/test/yarp/fixtures/defined.txt
@@ -0,0 +1,7 @@
+defined? 1 and defined? 2
+
+defined?(x %= 2)
+
+defined?(foo and bar)
+
+defined? 1
diff --git a/test/yarp/fixtures/dos_endings.txt b/test/yarp/fixtures/dos_endings.txt
new file mode 100644
index 0000000000..c105522fa1
--- /dev/null
+++ b/test/yarp/fixtures/dos_endings.txt
@@ -0,0 +1,20 @@
+puts "hi"\

+     "there"

+

+%I{a\

+b}

+

+<<-E

+    1 \

+    2

+    3

+E

+

+x = %

+

+

+

+a = foo(<<~EOF.chop)

+

+    baz

+  EOF

diff --git a/test/yarp/fixtures/embdoc_no_newline_at_end.txt b/test/yarp/fixtures/embdoc_no_newline_at_end.txt
new file mode 100644
index 0000000000..7dc2e32d73
--- /dev/null
+++ b/test/yarp/fixtures/embdoc_no_newline_at_end.txt
@@ -0,0 +1,2 @@
+=begin
+=end
\ No newline at end of file
diff --git a/test/yarp/fixtures/for.txt b/test/yarp/fixtures/for.txt
new file mode 100644
index 0000000000..b6eb2cb24f
--- /dev/null
+++ b/test/yarp/fixtures/for.txt
@@ -0,0 +1,19 @@
+for i in 1..10
+i
+end
+
+for i in 1..10; i; end
+
+for i,j in 1..10
+i
+end
+
+for i,j,k in 1..10
+i
+end
+
+for i in 1..10 do
+i
+end
+
+for i in 1..10; i; end
diff --git a/test/yarp/fixtures/global_variables.txt b/test/yarp/fixtures/global_variables.txt
new file mode 100644
index 0000000000..d2a631136f
--- /dev/null
+++ b/test/yarp/fixtures/global_variables.txt
@@ -0,0 +1,89 @@
+$global_variable
+
+$_
+
+$-w
+
+$LOAD_PATH
+
+$stdin
+
+$stdout
+
+$stderr
+
+$!
+
+$?
+
+$~
+
+$&
+
+$`
+
+$'
+
+$+
+
+$:
+
+$;
+
+$,
+
+$DEBUG
+
+$FILENAME
+
+$-0
+
+$LOADED_FEATURES
+
+$VERBOSE
+
+$-K
+
+:$global_variable
+
+:$_
+
+:$-w
+
+:$LOAD_PATH
+
+:$stdin
+
+:$stdout
+
+:$stderr
+
+:$!
+
+:$?
+
+:$~
+
+:$&
+
+:$`
+
+:$'
+
+:$+
+
+:$:
+
+:$;
+
+:$DEBUG
+
+:$FILENAME
+
+:$-0
+
+:$LOADED_FEATURES
+
+:$VERBOSE
+
+:$-K
diff --git a/test/yarp/fixtures/hashes.txt b/test/yarp/fixtures/hashes.txt
new file mode 100644
index 0000000000..42c430e43e
--- /dev/null
+++ b/test/yarp/fixtures/hashes.txt
@@ -0,0 +1,20 @@
+{}
+
+{
+}
+
+{ a => b, c => d }
+
+{ a => b, **c }
+
+{
+      a: b,
+      c: d
+
+
+
+    }
+
+{ a: b, c: d, **e, f: g }
+
+{ "a": !b? }
diff --git a/test/yarp/fixtures/heredoc_with_trailing_newline.txt b/test/yarp/fixtures/heredoc_with_trailing_newline.txt
new file mode 100644
index 0000000000..13771bf3ac
--- /dev/null
+++ b/test/yarp/fixtures/heredoc_with_trailing_newline.txt
@@ -0,0 +1,2 @@
+<<-END
+END
\ No newline at end of file
diff --git a/test/yarp/fixtures/heredocs_nested.txt b/test/yarp/fixtures/heredocs_nested.txt
new file mode 100644
index 0000000000..eef7206d69
--- /dev/null
+++ b/test/yarp/fixtures/heredocs_nested.txt
@@ -0,0 +1,9 @@
+<<~RUBY
+pre
+#{
+<<RUBY
+  hello
+RUBY
+}
+post
+RUBY
diff --git a/test/yarp/fixtures/heredocs_with_ignored_newlines.txt b/test/yarp/fixtures/heredocs_with_ignored_newlines.txt
new file mode 100644
index 0000000000..8e12546ec7
--- /dev/null
+++ b/test/yarp/fixtures/heredocs_with_ignored_newlines.txt
@@ -0,0 +1,14 @@
+<<-HERE\
+HERE
+
+<<~THERE\
+  way over
+  <<HERE
+    not here
+  HERE
+
+  <<~BUT\
+    but
+  BUT
+    there
+THERE
diff --git a/test/yarp/fixtures/heredocs_with_ignored_newlines_and_non_empty.txt b/test/yarp/fixtures/heredocs_with_ignored_newlines_and_non_empty.txt
new file mode 100644
index 0000000000..aeacbd8126
--- /dev/null
+++ b/test/yarp/fixtures/heredocs_with_ignored_newlines_and_non_empty.txt
@@ -0,0 +1,4 @@
+<<-EOE
+ some
+ heredocs
+EOE
\ No newline at end of file
diff --git a/test/yarp/fixtures/if.txt b/test/yarp/fixtures/if.txt
new file mode 100644
index 0000000000..895d668094
--- /dev/null
+++ b/test/yarp/fixtures/if.txt
@@ -0,0 +1,31 @@
+if true; 1; end
+
+if true
+1 else 2 end
+
+if true then true elsif false then false elsif nil then nil else self end
+
+1 if true
+
+break if true
+
+next if true
+
+return if true
+
+if exit_loop then break 42 end
+
+if foo
+then bar
+end
+
+a if b if c
+
+if true
+  a b:
+else
+end
+
+if type in 1
+elsif type in B
+end
diff --git a/test/yarp/fixtures/integer_operations.txt b/test/yarp/fixtures/integer_operations.txt
new file mode 100644
index 0000000000..37163acf30
--- /dev/null
+++ b/test/yarp/fixtures/integer_operations.txt
@@ -0,0 +1,63 @@
+!1
+
+~1
+
+1 != 2
+
+1 !~ 2
+
+1 % 2
+
+1 & 2
+
+1 * 2
+
+1**2
+
+1 + 2
+
+1 - 2
+
+1 / 2
+
+1/2/3
+
+1 < 2
+
+1 << 2
+
+1 <= 2
+
+1 <=> 2
+
+1 == 2
+
+1 === 2
+
+1 =~ 2
+
+1 > 2
+
+1 >= 2
+
+1 >> 2
+
+1 ^ 2
+
+1 | 2
+
+1 && 2
+
+1 and 2
+
+1 * 2 ** 3
+
+1 * 2 + 3
+
+1 or 2
+
+1 || 2
+
+1 + 2 * 3
+
+(1 + 1)
diff --git a/test/yarp/fixtures/keyword_method_names.txt b/test/yarp/fixtures/keyword_method_names.txt
new file mode 100644
index 0000000000..9154469441
--- /dev/null
+++ b/test/yarp/fixtures/keyword_method_names.txt
@@ -0,0 +1,29 @@
+def def
+end
+
+def self.ensure
+end
+
+private def foo
+  bar do
+  end
+end
+
+def m(a, **nil)
+end
+
+def __ENCODING__.a
+end
+
+%{abc}
+
+%"abc"
+
+def __FILE__.a
+end
+
+def __LINE__.a
+end
+
+def nil::a
+end
diff --git a/test/yarp/fixtures/keywords.txt b/test/yarp/fixtures/keywords.txt
new file mode 100644
index 0000000000..90cdfb41c7
--- /dev/null
+++ b/test/yarp/fixtures/keywords.txt
@@ -0,0 +1,11 @@
+redo
+
+retry
+
+self
+
+__ENCODING__
+
+__FILE__
+
+__LINE__
diff --git a/test/yarp/fixtures/lambda.txt b/test/yarp/fixtures/lambda.txt
new file mode 100644
index 0000000000..1071810aa1
--- /dev/null
+++ b/test/yarp/fixtures/lambda.txt
@@ -0,0 +1,7 @@
+->(
+  foo
+) {}
+
+->(x: "b#{a}") { }
+
+->(a: b * 3) {}
diff --git a/test/yarp/fixtures/method_calls.txt b/test/yarp/fixtures/method_calls.txt
new file mode 100644
index 0000000000..06ed1cb9cc
--- /dev/null
+++ b/test/yarp/fixtures/method_calls.txt
@@ -0,0 +1,139 @@
+foo.bar %{baz}
+
+a.b(c, d)
+
+a.b()
+
+foo
+  .bar
+  &.baz
+
+a!
+
+a.()
+
+a.(1, 2, 3)
+
+a::b
+
+foo.bar = 1
+
+a?
+
+a(&block)
+
+a(**kwargs)
+
+a.b.c
+
+a(b, c)
+
+a()
+
+a(*args)
+
+a b, c
+
+a.b c, d
+
+foo.foo, bar.bar = 1, 2
+
+a&.b
+
+a&.()
+
+a&.b(c)
+
+a&.b()
+
+foo :a, :b if bar? or baz and qux
+
+foo(:a,
+
+	 :b
+)
+
+foo(*rest)
+
+foo(:a, :h => [:x, :y], :a => :b, &:bar)
+
+hi 123, { :there => :friend, **{}, whatup: :dog }
+
+foo :a, b: true do |a, b| puts a end
+
+hi there: :friend
+
+hi :there => :friend, **{}, whatup: :dog
+
+hi(:there => :friend, **{}, whatup: :dog)
+
+foo({ a: true, b: false, }, &:block)
+
+hi :there => :friend
+
+foo(:a,
+:b,
+)
+
+foo(
+:a,
+b: :c,
+)
+
+foo a: true, b: false, &:block
+
+some_func 1, kwarg: 2
+
+Kernel.Integer(10)
+
+x.each { }
+
+foo.map { $& }
+
+A::B::C :foo
+
+A::B::C(:foo)
+
+A::B::C(:foo) { }
+
+foo("a": -1)
+
+foo bar: { baz: qux do end }
+
+foo bar: { **kw do end }
+
+foo "#{bar.map do "baz" end}" do end
+
+foo class Bar baz do end end
+
+foo module Bar baz do end end
+
+foo [baz do end]
+
+p begin 1.times do 1 end end
+
+foo :a,
+  if x
+    bar do |a|
+      a
+    end
+  end
+
+foo :a,
+  while x
+    bar do |a|
+      a
+    end
+  end,
+  until x
+    baz do
+    end
+  end
+
+{} + A {}
+
+{} + A { |a| a }
+
+A {} + A {}
+
+lst << A {}
diff --git a/test/yarp/fixtures/methods.txt b/test/yarp/fixtures/methods.txt
new file mode 100644
index 0000000000..de17645bb5
--- /dev/null
+++ b/test/yarp/fixtures/methods.txt
@@ -0,0 +1,165 @@
+def foo((bar, baz))
+end
+
+def foo((bar, baz), optional = 1, (bin, bag))
+end
+
+
+def a; ensure; end
+
+def (b).a
+end
+
+def (a)::b
+end
+
+def false.a
+end
+
+def a(...)
+end
+
+def $var.a
+end
+
+def a.b
+end
+
+def @var.a
+end
+
+def a b:; end
+
+%,abc,
+
+def a(b:)
+end
+
+def a(**b)
+end
+
+def a(**)
+end
+
+a = 1; def a
+end
+
+def a b, c, d
+end
+
+def nil.a
+end
+
+def a b:, c: 1
+end
+
+def a(b:, c: 1)
+end
+
+def a(b:
+  1, c:)
+end
+
+%.abc.
+
+def a b = 1, c = 2
+end
+
+def a()
+end
+
+def a b, c = 2
+end
+
+def a b
+end
+
+def a; rescue; else; ensure; end
+
+def a *b
+end
+
+def a(*)
+end
+
+def a
+b = 1
+end
+
+def self.a
+end
+
+def true.a
+end
+
+def a
+end
+
+def hi
+return :hi if true
+:bye
+end
+
+def foo = 1
+def bar = 2
+
+def foo(bar) = 123
+
+def foo = 123
+
+def a(*); b(*); end
+
+def a(...); b(...); end
+
+def a(...); b(1, 2, ...); end
+
+def (c = b).a
+end
+
+def a &b
+end
+
+def a(&)
+end
+
+def @@var.a
+end
+
+def (a = b).C
+end
+
+def self.Array_function; end
+
+Const = 1; def Const.a
+end
+
+def a(...); "foo#{b(...)}"; end
+
+def foo
+  {}.merge **bar, **baz, **qux
+end
+
+def bar(a: (1...10))
+end
+
+def bar(a: (...10))
+end
+
+def bar(a: (1...))
+end
+
+def bar(a = (1...10))
+end
+
+def bar(a = (...10))
+end
+
+def bar(a = (1...))
+end
+
+def method(a)
+  item >> a {}
+end
+
+def foo(_a, _a, b, c)
+end
diff --git a/test/yarp/fixtures/modules.txt b/test/yarp/fixtures/modules.txt
new file mode 100644
index 0000000000..76bd9bea43
--- /dev/null
+++ b/test/yarp/fixtures/modules.txt
@@ -0,0 +1,18 @@
+module A a = 1 end
+
+%Q{aaa #{bbb} ccc}
+
+module m::M
+end
+
+module A
+ x = 1; rescue; end
+
+module ::A
+end
+
+module A[]::B
+end
+
+module A[1]::B
+end
diff --git a/test/yarp/fixtures/next.txt b/test/yarp/fixtures/next.txt
new file mode 100644
index 0000000000..476f17ffe3
--- /dev/null
+++ b/test/yarp/fixtures/next.txt
@@ -0,0 +1,24 @@
+next
+
+next (1), (2), (3)
+
+next 1
+
+next 1, 2,
+3
+
+next 1, 2, 3
+
+next [1, 2, 3]
+
+next(
+  1
+  2
+)
+
+next
+1
+
+next()
+
+next(1)
diff --git a/test/yarp/fixtures/nils.txt b/test/yarp/fixtures/nils.txt
new file mode 100644
index 0000000000..8084db2534
--- /dev/null
+++ b/test/yarp/fixtures/nils.txt
@@ -0,0 +1,13 @@
+nil
+
+()
+
+(
+;
+;
+)
+
+END { 1 }
+
+BEGIN { 1 }
+
diff --git a/test/yarp/fixtures/non_alphanumeric_methods.txt b/test/yarp/fixtures/non_alphanumeric_methods.txt
new file mode 100644
index 0000000000..1da3fd852b
--- /dev/null
+++ b/test/yarp/fixtures/non_alphanumeric_methods.txt
@@ -0,0 +1,105 @@
+def !
+end
+
+def !=
+end
+
+def !~
+end
+
+def %
+end
+
+def self.+
+end
+
+def &
+end
+
+def *
+end
+
+def **
+end
+
+%|abc|
+
+def + **b
+end
+
+def +()
+end
+
+def + b
+end
+
+def self.+
+end
+
+def +
+end
+
+def +@
+end
+
+def -
+end
+
+def a.-;end
+
+def -@
+end
+
+def /
+end
+
+def <
+end
+
+def <<
+end
+
+def <=
+end
+
+def <=>
+end
+
+def ==
+end
+
+def ===
+end
+
+def =~
+end
+
+def >
+end
+
+def >=
+end
+
+def >>
+end
+
+def []
+end
+
+def []=
+end
+
+def ^
+end
+
+def `
+end
+
+def self.`
+end
+
+def |
+end
+
+def ~
+end
diff --git a/test/yarp/fixtures/not.txt b/test/yarp/fixtures/not.txt
new file mode 100644
index 0000000000..eeb976c410
--- /dev/null
+++ b/test/yarp/fixtures/not.txt
@@ -0,0 +1,20 @@
+not foo and not bar
+
+not(foo and bar)
+
+not foo
+
+not foo and not
+  bar
+
+
+not foo and
+    not
+  bar
+
+
+not foo and
+  not
+
+
+  bar
diff --git a/test/yarp/fixtures/numbers.txt b/test/yarp/fixtures/numbers.txt
new file mode 100644
index 0000000000..3c8bf07805
--- /dev/null
+++ b/test/yarp/fixtures/numbers.txt
@@ -0,0 +1,63 @@
+0
+
+1
+
+1.0
+
+2
+
+0b0
+
+0b1
+
+0b10
+
+0d0
+
+0d1
+
+0d2
+
+00
+
+01
+
+02
+
+0o0
+
+0o1
+
+0o2
+
+0x0
+
+0x1
+
+0x2
+
+1i
+
+1r
+
+-1
+
+1ri
+
+1.2ri
+
+-1ri
+
+-1.2ri
+
+0o1r
+
+0o1i
+
+0o1ri
+
+0d1r
+
+0d1i
+
+0b1ri
diff --git a/test/yarp/fixtures/patterns.txt b/test/yarp/fixtures/patterns.txt
new file mode 100644
index 0000000000..c779b85cea
--- /dev/null
+++ b/test/yarp/fixtures/patterns.txt
@@ -0,0 +1,191 @@
+foo => bar
+foo => 1
+foo => 1.0
+foo => 1i
+foo => 1r
+foo => :foo
+foo => %s[foo]
+foo => :"foo"
+foo => /foo/
+foo => `foo`
+foo => %x[foo]
+foo => %i[foo]
+foo => %I[foo]
+foo => %w[foo]
+foo => %W[foo]
+foo => %q[foo]
+foo => %Q[foo]
+foo => "foo"
+foo => nil
+foo => self
+foo => true
+foo => false
+foo => __FILE__
+foo => __LINE__
+foo => __ENCODING__
+foo => -> { bar }
+
+foo => 1 .. 1
+foo => 1.0 .. 1.0
+foo => 1i .. 1i
+foo => 1r .. 1r
+foo => :foo .. :foo
+foo => %s[foo] .. %s[foo]
+foo => :"foo" .. :"foo"
+foo => /foo/ .. /foo/
+foo => `foo` .. `foo`
+foo => %x[foo] .. %x[foo]
+foo => %i[foo] .. %i[foo]
+foo => %I[foo] .. %I[foo]
+foo => %w[foo] .. %w[foo]
+foo => %W[foo] .. %W[foo]
+foo => %q[foo] .. %q[foo]
+foo => %Q[foo] .. %Q[foo]
+foo => "foo" .. "foo"
+foo => nil .. nil
+foo => self .. self
+foo => true .. true
+foo => false .. false
+foo => __FILE__ .. __FILE__
+foo => __LINE__ .. __LINE__
+foo => __ENCODING__ .. __ENCODING__
+foo => -> { bar } .. -> { bar }
+
+foo => ^bar
+foo => ^@bar
+foo => ^@@bar
+foo => ^$bar
+
+foo => ^(1)
+foo => ^(nil)
+foo => ^("bar" + "baz")
+
+foo => Foo
+foo => Foo::Bar::Baz
+foo => ::Foo
+foo => ::Foo::Bar::Baz
+
+foo => Foo()
+foo => Foo(1)
+foo => Foo(1, 2, 3)
+foo => Foo(bar)
+foo => Foo(*bar, baz)
+foo => Foo(bar, *baz)
+foo => Foo(*bar, baz, *qux)
+
+foo => Foo[]
+foo => Foo[1]
+foo => Foo[1, 2, 3]
+foo => Foo[bar]
+foo => Foo[*bar, baz]
+foo => Foo[bar, *baz]
+foo => Foo[*bar, baz, *qux]
+
+foo => *bar
+foo => *bar, baz, qux
+foo => bar, *baz, qux
+foo => bar, baz, *qux
+foo => *bar, baz, *qux
+
+foo => []
+foo => [[[[[]]]]]
+
+foo => [*bar]
+foo => [*bar, baz, qux]
+foo => [bar, *baz, qux]
+foo => [bar, baz, *qux]
+foo => [*bar, baz, *qux]
+
+foo in bar
+foo in 1
+foo in 1.0
+foo in 1i
+foo in 1r
+foo in :foo
+foo in %s[foo]
+foo in :"foo"
+foo in /foo/
+foo in `foo`
+foo in %x[foo]
+foo in %i[foo]
+foo in %I[foo]
+foo in %w[foo]
+foo in %W[foo]
+foo in %q[foo]
+foo in %Q[foo]
+foo in "foo"
+foo in nil
+foo in self
+foo in true
+foo in false
+foo in __FILE__
+foo in __LINE__
+foo in __ENCODING__
+foo in -> { bar }
+
+case foo; in bar then end
+case foo; in 1 then end
+case foo; in 1.0 then end
+case foo; in 1i then end
+case foo; in 1r then end
+case foo; in :foo then end
+case foo; in %s[foo] then end
+case foo; in :"foo" then end
+case foo; in /foo/ then end
+case foo; in `foo` then end
+case foo; in %x[foo] then end
+case foo; in %i[foo] then end
+case foo; in %I[foo] then end
+case foo; in %w[foo] then end
+case foo; in %W[foo] then end
+case foo; in %q[foo] then end
+case foo; in %Q[foo] then end
+case foo; in "foo" then end
+case foo; in nil then end
+case foo; in self then end
+case foo; in true then end
+case foo; in false then end
+case foo; in __FILE__ then end
+case foo; in __LINE__ then end
+case foo; in __ENCODING__ then end
+case foo; in -> { bar } then end
+
+case foo; in bar if baz then end
+case foo; in 1 if baz then end
+case foo; in 1.0 if baz then end
+case foo; in 1i if baz then end
+case foo; in 1r if baz then end
+case foo; in :foo if baz then end
+case foo; in %s[foo] if baz then end
+case foo; in :"foo" if baz then end
+case foo; in /foo/ if baz then end
+case foo; in `foo` if baz then end
+case foo; in %x[foo] if baz then end
+case foo; in %i[foo] if baz then end
+case foo; in %I[foo] if baz then end
+case foo; in %w[foo] if baz then end
+case foo; in %W[foo] if baz then end
+case foo; in %q[foo] if baz then end
+case foo; in %Q[foo] if baz then end
+case foo; in "foo" if baz then end
+case foo; in nil if baz then end
+case foo; in self if baz then end
+case foo; in true if baz then end
+case foo; in false if baz then end
+case foo; in __FILE__ if baz then end
+case foo; in __LINE__ if baz then end
+case foo; in __ENCODING__ if baz then end
+case foo; in -> { bar } if baz then end
+
+if a in []
+end
+
+a => [
+  b
+]
+
+foo in A[
+  bar: B[
+    value: a
+  ]
+]
diff --git a/test/yarp/fixtures/procs.txt b/test/yarp/fixtures/procs.txt
new file mode 100644
index 0000000000..7ffb11e78a
--- /dev/null
+++ b/test/yarp/fixtures/procs.txt
@@ -0,0 +1,27 @@
+-> (a; b, c, d) { b }
+
+-> do
+ensure
+end
+
+-> do
+rescue
+else
+ensure
+end
+
+-> { foo }
+
+-> do; foo; end
+
+-> a, b = 1, c:, d:, &e { a }
+
+-> (a, b = 1, *c, d:, e:, **f, &g) { a }
+
+-> (a, b = 1, *c, d:, e:, **f, &g) do
+  a
+end
+
+-> (a) { -> b { a * b } }
+
+-> ((a, b), *c) { }
diff --git a/test/yarp/fixtures/range_begin_open_exclusive.txt b/test/yarp/fixtures/range_begin_open_exclusive.txt
new file mode 100644
index 0000000000..3b12672b4f
--- /dev/null
+++ b/test/yarp/fixtures/range_begin_open_exclusive.txt
@@ -0,0 +1 @@
+...2
diff --git a/test/yarp/fixtures/range_begin_open_inclusive.txt b/test/yarp/fixtures/range_begin_open_inclusive.txt
new file mode 100644
index 0000000000..052f45900b
--- /dev/null
+++ b/test/yarp/fixtures/range_begin_open_inclusive.txt
@@ -0,0 +1 @@
+..2
diff --git a/test/yarp/fixtures/range_end_open_exclusive.txt b/test/yarp/fixtures/range_end_open_exclusive.txt
new file mode 100644
index 0000000000..2ffd68afdb
--- /dev/null
+++ b/test/yarp/fixtures/range_end_open_exclusive.txt
@@ -0,0 +1 @@
+2...
diff --git a/test/yarp/fixtures/range_end_open_inclusive.txt b/test/yarp/fixtures/range_end_open_inclusive.txt
new file mode 100644
index 0000000000..48445391f6
--- /dev/null
+++ b/test/yarp/fixtures/range_end_open_inclusive.txt
@@ -0,0 +1 @@
+2..
diff --git a/test/yarp/fixtures/ranges.txt b/test/yarp/fixtures/ranges.txt
new file mode 100644
index 0000000000..55c0ade965
--- /dev/null
+++ b/test/yarp/fixtures/ranges.txt
@@ -0,0 +1,17 @@
+(...2)
+
+(..2)
+
+1...2
+
+foo[...2]
+
+{ foo: ...bar }
+
+(1...)
+
+1..2
+
+{ foo: ..bar }
+
+(1..)
diff --git a/test/yarp/fixtures/regex.txt b/test/yarp/fixtures/regex.txt
new file mode 100644
index 0000000000..fe7b848b1b
--- /dev/null
+++ b/test/yarp/fixtures/regex.txt
@@ -0,0 +1,28 @@
+foo /bar/
+
+%r{abc}i
+
+/a\b/
+
+/aaa #$bbb/
+
+/aaa #{bbb} ccc/
+
+[/(?<foo>bar)/ =~ baz, foo]
+
+/abc/i
+
+%r/[a-z$._?][\w$.?#@~]*:/i
+
+%r/([a-z$._?][\w$.?#@~]*)(\s+)(equ)/i
+
+%r/[a-z$._?][\w$.?#@~]*/i
+
+%r(
+(?:[\w#$%_']|\(\)|\(,\)|\[\]|[0-9])*
+  (?:[\w#$%_']+)
+)
+
+/(?#\))/ =~ "hi"
+
+%r#pound#
diff --git a/test/yarp/fixtures/rescue.txt b/test/yarp/fixtures/rescue.txt
new file mode 100644
index 0000000000..0d26fd2523
--- /dev/null
+++ b/test/yarp/fixtures/rescue.txt
@@ -0,0 +1,31 @@
+foo rescue nil
+
+foo rescue
+nil
+
+break rescue nil
+
+next rescue nil
+
+return rescue nil
+
+foo rescue nil || 1
+
+foo rescue nil ? 1 : 2
+
+begin; a; rescue *b; end
+
+foo do |x|
+  bar(y) rescue ArgumentError fail "baz"
+end
+
+if a = foo rescue nil
+  bar
+end
+
+def some_method = other_method 42 rescue nil
+
+def a
+  a b:
+rescue
+end
diff --git a/test/yarp/fixtures/return.txt b/test/yarp/fixtures/return.txt
new file mode 100644
index 0000000000..a8b5b95fab
--- /dev/null
+++ b/test/yarp/fixtures/return.txt
@@ -0,0 +1,24 @@
+return
+
+return (1), (2), (3)
+
+return *1
+
+return 1
+
+return 1, 2,
+3
+
+return 1, 2, 3
+
+return [1, 2, 3]
+
+return(
+  1
+  2
+)
+
+return()
+
+return(1)
+
diff --git a/test/yarp/fixtures/seattlerb/BEGIN.txt b/test/yarp/fixtures/seattlerb/BEGIN.txt
new file mode 100644
index 0000000000..bed5755901
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/BEGIN.txt
@@ -0,0 +1 @@
+BEGIN { 42 }
diff --git a/test/yarp/fixtures/seattlerb/README.rdoc b/test/yarp/fixtures/seattlerb/README.rdoc
new file mode 100644
index 0000000000..649e4e4c2f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/README.rdoc
@@ -0,0 +1,113 @@
+= ruby_parser
+
+home :: https://github.com/seattlerb/ruby_parser
+bugs :: https://github.com/seattlerb/ruby_parser/issues
+rdoc :: http://docs.seattlerb.org/ruby_parser
+
+== DESCRIPTION:
+
+ruby_parser (RP) is a ruby parser written in pure ruby (utilizing
+racc--which does by default use a C extension). It outputs
+s-expressions which can be manipulated and converted back to ruby via
+the ruby2ruby gem.
+
+As an example:
+
+    def conditional1 arg1
+      return 1 if arg1 == 0
+      return 0
+    end
+
+becomes:
+
+    s(:defn, :conditional1, s(:args, :arg1),
+      s(:if,
+        s(:call, s(:lvar, :arg1), :==, s(:lit, 0)),
+        s(:return, s(:lit, 1)),
+        nil),
+      s(:return, s(:lit, 0)))
+
+Tested against 801,039 files from the latest of all rubygems (as of 2013-05):
+
+* 1.8 parser is at 99.9739% accuracy, 3.651 sigma
+* 1.9 parser is at 99.9940% accuracy, 4.013 sigma
+* 2.0 parser is at 99.9939% accuracy, 4.008 sigma
+* 2.6 parser is at 99.9972% accuracy, 4.191 sigma
+* 3.0 parser has a 100% parse rate.
+  * Tested against 2,672,412 unique ruby files across 167k gems.
+  * As do all the others now, basically.
+
+== FEATURES/PROBLEMS:
+
+* Pure ruby, no compiles.
+* Includes preceding comment data for defn/defs/class/module nodes!
+* Incredibly simple interface.
+* Output is 100% equivalent to ParseTree.
+  * Can utilize PT's SexpProcessor and UnifiedRuby for language processing.
+* Known Issue: Speed is now pretty good, but can always improve:
+  * RP parses a corpus of 3702 files in 125s (avg 108 Kb/s)
+  * MRI+PT parsed the same in 67.38s (avg 200.89 Kb/s)
+* Known Issue: Code is much better, but still has a long way to go.
+* Known Issue: Totally awesome.
+* Known Issue: line number values can be slightly off. Parsing LR sucks.
+
+== SYNOPSIS:
+
+  RubyParser.new.parse "1+1"
+  # => s(:call, s(:lit, 1), :+, s(:lit, 1))
+
+You can also use Ruby19Parser, Ruby18Parser, or RubyParser.for_current_ruby:
+
+  RubyParser.for_current_ruby.parse "1+1"
+  # => s(:call, s(:lit, 1), :+, s(:lit, 1))
+
+== DEVELOPER NOTES:
+
+To add a new version:
+
+* New parser should be generated from lib/ruby[3]_parser.yy.
+* Extend lib/ruby[3]_parser.yy with new class name.
+* Add new version number to V2/V3 in Rakefile for rule creation.
+* Add new `ruby_parse "x.y.z"` line to Rakefile for rake compare (line ~300).
+* Require generated parser in lib/ruby_parser.rb.
+* Add new V## = ::Ruby##Parser; end to ruby_parser.rb (bottom of file).
+* Add empty TestRubyParserShared##Plus module and TestRubyParserV## to test/test_ruby_parser.rb.
+* Extend Manifest.txt with generated file names.
+* Add new version number to sexp_processor's pt_testcase.rb in all_versions
+
+Until all of these are done, you won't have a clean test run.
+
+== REQUIREMENTS:
+
+* ruby. woot.
+* sexp_processor for Sexp and SexpProcessor classes, and testing.
+* racc full package for parser development (compiling .y to .rb).
+
+== INSTALL:
+
+* sudo gem install ruby_parser
+
+== LICENSE:
+
+(The MIT License)
+
+Copyright (c) Ryan Davis, seattle.rb
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/test/yarp/fixtures/seattlerb/__ENCODING__.txt b/test/yarp/fixtures/seattlerb/__ENCODING__.txt
new file mode 100644
index 0000000000..d6debf2f92
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/__ENCODING__.txt
@@ -0,0 +1 @@
+__ENCODING__
diff --git a/test/yarp/fixtures/seattlerb/alias_gvar_backref.txt b/test/yarp/fixtures/seattlerb/alias_gvar_backref.txt
new file mode 100644
index 0000000000..016bd94fe0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/alias_gvar_backref.txt
@@ -0,0 +1 @@
+alias $MATCH $&
diff --git a/test/yarp/fixtures/seattlerb/alias_resword.txt b/test/yarp/fixtures/seattlerb/alias_resword.txt
new file mode 100644
index 0000000000..63e782614b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/alias_resword.txt
@@ -0,0 +1 @@
+alias in out
diff --git a/test/yarp/fixtures/seattlerb/and_multi.txt b/test/yarp/fixtures/seattlerb/and_multi.txt
new file mode 100644
index 0000000000..8902086cac
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/and_multi.txt
@@ -0,0 +1,3 @@
+true and
+not false and
+true
diff --git a/test/yarp/fixtures/seattlerb/aref_args_assocs.txt b/test/yarp/fixtures/seattlerb/aref_args_assocs.txt
new file mode 100644
index 0000000000..3244eebafc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/aref_args_assocs.txt
@@ -0,0 +1 @@
+[1 => 2]
diff --git a/test/yarp/fixtures/seattlerb/aref_args_lit_assocs.txt b/test/yarp/fixtures/seattlerb/aref_args_lit_assocs.txt
new file mode 100644
index 0000000000..0b6ffa7e2c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/aref_args_lit_assocs.txt
@@ -0,0 +1 @@
+[1, 2 => 3]
diff --git a/test/yarp/fixtures/seattlerb/args_kw_block.txt b/test/yarp/fixtures/seattlerb/args_kw_block.txt
new file mode 100644
index 0000000000..cb6ab39852
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/args_kw_block.txt
@@ -0,0 +1 @@
+def f(a: 1, &b); end
diff --git a/test/yarp/fixtures/seattlerb/array_line_breaks.txt b/test/yarp/fixtures/seattlerb/array_line_breaks.txt
new file mode 100644
index 0000000000..be9f2d9cb8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/array_line_breaks.txt
@@ -0,0 +1,4 @@
+[
+'a',
+'b']
+1
diff --git a/test/yarp/fixtures/seattlerb/array_lits_trailing_calls.txt b/test/yarp/fixtures/seattlerb/array_lits_trailing_calls.txt
new file mode 100644
index 0000000000..868384a407
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/array_lits_trailing_calls.txt
@@ -0,0 +1,3 @@
+%w[].b
+
+[].b
diff --git a/test/yarp/fixtures/seattlerb/assoc__bare.txt b/test/yarp/fixtures/seattlerb/assoc__bare.txt
new file mode 100644
index 0000000000..96c2940f31
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/assoc__bare.txt
@@ -0,0 +1 @@
+{ y: }
diff --git a/test/yarp/fixtures/seattlerb/assoc_label.txt b/test/yarp/fixtures/seattlerb/assoc_label.txt
new file mode 100644
index 0000000000..372dc75031
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/assoc_label.txt
@@ -0,0 +1 @@
+a(b:1)
diff --git a/test/yarp/fixtures/seattlerb/attr_asgn_colon_id.txt b/test/yarp/fixtures/seattlerb/attr_asgn_colon_id.txt
new file mode 100644
index 0000000000..f63c2f5dcb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/attr_asgn_colon_id.txt
@@ -0,0 +1 @@
+A::b = 1
diff --git a/test/yarp/fixtures/seattlerb/attrasgn_array_arg.txt b/test/yarp/fixtures/seattlerb/attrasgn_array_arg.txt
new file mode 100644
index 0000000000..db9e2db063
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/attrasgn_array_arg.txt
@@ -0,0 +1 @@
+a[[1, 2]] = 3
diff --git a/test/yarp/fixtures/seattlerb/attrasgn_array_lhs.txt b/test/yarp/fixtures/seattlerb/attrasgn_array_lhs.txt
new file mode 100644
index 0000000000..0b8e31632d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/attrasgn_array_lhs.txt
@@ -0,0 +1 @@
+[1, 2, 3, 4][from .. to] = ["a", "b", "c"]
diff --git a/test/yarp/fixtures/seattlerb/attrasgn_primary_dot_constant.txt b/test/yarp/fixtures/seattlerb/attrasgn_primary_dot_constant.txt
new file mode 100644
index 0000000000..380a718963
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/attrasgn_primary_dot_constant.txt
@@ -0,0 +1 @@
+a.B = 1
diff --git a/test/yarp/fixtures/seattlerb/backticks_interpolation_line.txt b/test/yarp/fixtures/seattlerb/backticks_interpolation_line.txt
new file mode 100644
index 0000000000..b3ba31c72a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/backticks_interpolation_line.txt
@@ -0,0 +1 @@
+x `#{y}`
diff --git a/test/yarp/fixtures/seattlerb/bang_eq.txt b/test/yarp/fixtures/seattlerb/bang_eq.txt
new file mode 100644
index 0000000000..0283460e46
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bang_eq.txt
@@ -0,0 +1 @@
+1 != 2
diff --git a/test/yarp/fixtures/seattlerb/bdot2.txt b/test/yarp/fixtures/seattlerb/bdot2.txt
new file mode 100644
index 0000000000..4fb2692299
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bdot2.txt
@@ -0,0 +1,3 @@
+..10
+; ..a
+; c
diff --git a/test/yarp/fixtures/seattlerb/bdot3.txt b/test/yarp/fixtures/seattlerb/bdot3.txt
new file mode 100644
index 0000000000..8079cf9872
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bdot3.txt
@@ -0,0 +1,3 @@
+...10
+; ...a
+; c
diff --git a/test/yarp/fixtures/seattlerb/begin_ensure_no_bodies.txt b/test/yarp/fixtures/seattlerb/begin_ensure_no_bodies.txt
new file mode 100644
index 0000000000..51dde02ea3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/begin_ensure_no_bodies.txt
@@ -0,0 +1,3 @@
+begin
+ensure
+end
diff --git a/test/yarp/fixtures/seattlerb/begin_rescue_else_ensure_bodies.txt b/test/yarp/fixtures/seattlerb/begin_rescue_else_ensure_bodies.txt
new file mode 100644
index 0000000000..ae6e2c3636
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/begin_rescue_else_ensure_bodies.txt
@@ -0,0 +1,9 @@
+begin
+  1
+rescue
+  2
+else
+  3
+ensure
+  4
+end
diff --git a/test/yarp/fixtures/seattlerb/begin_rescue_else_ensure_no_bodies.txt b/test/yarp/fixtures/seattlerb/begin_rescue_else_ensure_no_bodies.txt
new file mode 100644
index 0000000000..456d9a5d6e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/begin_rescue_else_ensure_no_bodies.txt
@@ -0,0 +1,9 @@
+begin
+
+rescue
+
+else
+
+ensure
+
+end
diff --git a/test/yarp/fixtures/seattlerb/begin_rescue_ensure_no_bodies.txt b/test/yarp/fixtures/seattlerb/begin_rescue_ensure_no_bodies.txt
new file mode 100644
index 0000000000..896e3c030a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/begin_rescue_ensure_no_bodies.txt
@@ -0,0 +1,4 @@
+begin
+rescue
+ensure
+end
diff --git a/test/yarp/fixtures/seattlerb/block_arg__bare.txt b/test/yarp/fixtures/seattlerb/block_arg__bare.txt
new file mode 100644
index 0000000000..6454b00345
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg__bare.txt
@@ -0,0 +1 @@
+def x(&); end
diff --git a/test/yarp/fixtures/seattlerb/block_arg_kwsplat.txt b/test/yarp/fixtures/seattlerb/block_arg_kwsplat.txt
new file mode 100644
index 0000000000..a9c255cc66
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_kwsplat.txt
@@ -0,0 +1 @@
+a { |**b| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_opt_arg_block.txt b/test/yarp/fixtures/seattlerb/block_arg_opt_arg_block.txt
new file mode 100644
index 0000000000..14cb02c68e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_opt_arg_block.txt
@@ -0,0 +1 @@
+a { |b, c=1, d, &e| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_opt_splat.txt b/test/yarp/fixtures/seattlerb/block_arg_opt_splat.txt
new file mode 100644
index 0000000000..a077ae1f34
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_opt_splat.txt
@@ -0,0 +1 @@
+a { |b, c = 1, *d| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_opt_splat_arg_block_omfg.txt b/test/yarp/fixtures/seattlerb/block_arg_opt_splat_arg_block_omfg.txt
new file mode 100644
index 0000000000..5016a7c6b9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_opt_splat_arg_block_omfg.txt
@@ -0,0 +1 @@
+a { |b, c=1, *d, e, &f| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_optional.txt b/test/yarp/fixtures/seattlerb/block_arg_optional.txt
new file mode 100644
index 0000000000..966afc5640
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_optional.txt
@@ -0,0 +1 @@
+a { |b = 1| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_scope.txt b/test/yarp/fixtures/seattlerb/block_arg_scope.txt
new file mode 100644
index 0000000000..2362e08559
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_scope.txt
@@ -0,0 +1 @@
+a { |b; c| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_scope2.txt b/test/yarp/fixtures/seattlerb/block_arg_scope2.txt
new file mode 100644
index 0000000000..f7222dc7b1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_scope2.txt
@@ -0,0 +1 @@
+a {|b; c, d| }
diff --git a/test/yarp/fixtures/seattlerb/block_arg_splat_arg.txt b/test/yarp/fixtures/seattlerb/block_arg_splat_arg.txt
new file mode 100644
index 0000000000..d7c31aae6b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_arg_splat_arg.txt
@@ -0,0 +1 @@
+a { |b, *c, d| }
diff --git a/test/yarp/fixtures/seattlerb/block_args_kwargs.txt b/test/yarp/fixtures/seattlerb/block_args_kwargs.txt
new file mode 100644
index 0000000000..467b577a7e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_args_kwargs.txt
@@ -0,0 +1 @@
+f { |**kwargs| kwargs }
diff --git a/test/yarp/fixtures/seattlerb/block_args_no_kwargs.txt b/test/yarp/fixtures/seattlerb/block_args_no_kwargs.txt
new file mode 100644
index 0000000000..5c9bfa3a62
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_args_no_kwargs.txt
@@ -0,0 +1 @@
+f { |**nil| }
diff --git a/test/yarp/fixtures/seattlerb/block_args_opt1.txt b/test/yarp/fixtures/seattlerb/block_args_opt1.txt
new file mode 100644
index 0000000000..372689e36a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_args_opt1.txt
@@ -0,0 +1 @@
+f { |a, b = 42| [a, b] }
diff --git a/test/yarp/fixtures/seattlerb/block_args_opt2.txt b/test/yarp/fixtures/seattlerb/block_args_opt2.txt
new file mode 100644
index 0000000000..10d0746646
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_args_opt2.txt
@@ -0,0 +1 @@
+a { | b=1, c=2 | }
diff --git a/test/yarp/fixtures/seattlerb/block_args_opt2_2.txt b/test/yarp/fixtures/seattlerb/block_args_opt2_2.txt
new file mode 100644
index 0000000000..563a9bf915
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_args_opt2_2.txt
@@ -0,0 +1 @@
+f { |a, b = 42, c = 24| [a, b, c] }
diff --git a/test/yarp/fixtures/seattlerb/block_args_opt3.txt b/test/yarp/fixtures/seattlerb/block_args_opt3.txt
new file mode 100644
index 0000000000..bb5a7c8458
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_args_opt3.txt
@@ -0,0 +1 @@
+f { |a, b = 42, c = 24, &d| [a, b, c, d] }
diff --git a/test/yarp/fixtures/seattlerb/block_break.txt b/test/yarp/fixtures/seattlerb/block_break.txt
new file mode 100644
index 0000000000..35eabee187
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_break.txt
@@ -0,0 +1 @@
+break foo arg do |bar| end
diff --git a/test/yarp/fixtures/seattlerb/block_call_defn_call_block_call.txt b/test/yarp/fixtures/seattlerb/block_call_defn_call_block_call.txt
new file mode 100644
index 0000000000..ff1b3a4c9f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_call_defn_call_block_call.txt
@@ -0,0 +1,4 @@
+a def b(c)
+ d
+ end
+ e.f do end
diff --git a/test/yarp/fixtures/seattlerb/block_call_dot_op2_brace_block.txt b/test/yarp/fixtures/seattlerb/block_call_dot_op2_brace_block.txt
new file mode 100644
index 0000000000..63da9ee7af
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_call_dot_op2_brace_block.txt
@@ -0,0 +1 @@
+a.b c() do d end.e do |f| g end
diff --git a/test/yarp/fixtures/seattlerb/block_call_dot_op2_cmd_args_do_block.txt b/test/yarp/fixtures/seattlerb/block_call_dot_op2_cmd_args_do_block.txt
new file mode 100644
index 0000000000..24e7d0f1f1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_call_dot_op2_cmd_args_do_block.txt
@@ -0,0 +1 @@
+a.b c() do d end.e f do |g| h end
diff --git a/test/yarp/fixtures/seattlerb/block_call_operation_colon.txt b/test/yarp/fixtures/seattlerb/block_call_operation_colon.txt
new file mode 100644
index 0000000000..593b9e1bc0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_call_operation_colon.txt
@@ -0,0 +1 @@
+a.b c do end::d
diff --git a/test/yarp/fixtures/seattlerb/block_call_operation_dot.txt b/test/yarp/fixtures/seattlerb/block_call_operation_dot.txt
new file mode 100644
index 0000000000..20b8e4fcb8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_call_operation_dot.txt
@@ -0,0 +1 @@
+a.b c do end.d
diff --git a/test/yarp/fixtures/seattlerb/block_call_paren_call_block_call.txt b/test/yarp/fixtures/seattlerb/block_call_paren_call_block_call.txt
new file mode 100644
index 0000000000..7f8be95100
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_call_paren_call_block_call.txt
@@ -0,0 +1,2 @@
+a (b)
+c.d do end
diff --git a/test/yarp/fixtures/seattlerb/block_command_operation_colon.txt b/test/yarp/fixtures/seattlerb/block_command_operation_colon.txt
new file mode 100644
index 0000000000..db221ad496
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_command_operation_colon.txt
@@ -0,0 +1 @@
+a :b do end::c :d
diff --git a/test/yarp/fixtures/seattlerb/block_command_operation_dot.txt b/test/yarp/fixtures/seattlerb/block_command_operation_dot.txt
new file mode 100644
index 0000000000..56b71677e8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_command_operation_dot.txt
@@ -0,0 +1 @@
+a :b do end.c :d
diff --git a/test/yarp/fixtures/seattlerb/block_decomp_anon_splat_arg.txt b/test/yarp/fixtures/seattlerb/block_decomp_anon_splat_arg.txt
new file mode 100644
index 0000000000..96f5d5d2ec
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_decomp_anon_splat_arg.txt
@@ -0,0 +1 @@
+f { |(*, a)| }
diff --git a/test/yarp/fixtures/seattlerb/block_decomp_arg_splat.txt b/test/yarp/fixtures/seattlerb/block_decomp_arg_splat.txt
new file mode 100644
index 0000000000..f8db3874de
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_decomp_arg_splat.txt
@@ -0,0 +1 @@
+a { |(b, *)| }
diff --git a/test/yarp/fixtures/seattlerb/block_decomp_arg_splat_arg.txt b/test/yarp/fixtures/seattlerb/block_decomp_arg_splat_arg.txt
new file mode 100644
index 0000000000..e64f4e8c3d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_decomp_arg_splat_arg.txt
@@ -0,0 +1 @@
+f { |(a, *b, c)| }
diff --git a/test/yarp/fixtures/seattlerb/block_decomp_splat.txt b/test/yarp/fixtures/seattlerb/block_decomp_splat.txt
new file mode 100644
index 0000000000..970f00a626
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_decomp_splat.txt
@@ -0,0 +1 @@
+f { |(*a)| }
diff --git a/test/yarp/fixtures/seattlerb/block_kw.txt b/test/yarp/fixtures/seattlerb/block_kw.txt
new file mode 100644
index 0000000000..bacfd32e80
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_kw.txt
@@ -0,0 +1 @@
+blah { |k:42| }
diff --git a/test/yarp/fixtures/seattlerb/block_kw__required.txt b/test/yarp/fixtures/seattlerb/block_kw__required.txt
new file mode 100644
index 0000000000..b84ab97037
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_kw__required.txt
@@ -0,0 +1 @@
+blah do |k:| end
diff --git a/test/yarp/fixtures/seattlerb/block_kwarg_lvar.txt b/test/yarp/fixtures/seattlerb/block_kwarg_lvar.txt
new file mode 100644
index 0000000000..390b9195e0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_kwarg_lvar.txt
@@ -0,0 +1 @@
+bl { |kw: :val| kw }
diff --git a/test/yarp/fixtures/seattlerb/block_kwarg_lvar_multiple.txt b/test/yarp/fixtures/seattlerb/block_kwarg_lvar_multiple.txt
new file mode 100644
index 0000000000..df3e4afde8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_kwarg_lvar_multiple.txt
@@ -0,0 +1 @@
+bl { |kw: :val, kw2: :val2 | kw }
diff --git a/test/yarp/fixtures/seattlerb/block_next.txt b/test/yarp/fixtures/seattlerb/block_next.txt
new file mode 100644
index 0000000000..760fcbf809
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_next.txt
@@ -0,0 +1 @@
+next foo arg do |bar| end
diff --git a/test/yarp/fixtures/seattlerb/block_opt_arg.txt b/test/yarp/fixtures/seattlerb/block_opt_arg.txt
new file mode 100644
index 0000000000..5e312fdf41
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_opt_arg.txt
@@ -0,0 +1 @@
+a { |b=1, c| }
diff --git a/test/yarp/fixtures/seattlerb/block_opt_splat.txt b/test/yarp/fixtures/seattlerb/block_opt_splat.txt
new file mode 100644
index 0000000000..772a3fc412
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_opt_splat.txt
@@ -0,0 +1 @@
+a { |b = 1, *c| }
diff --git a/test/yarp/fixtures/seattlerb/block_opt_splat_arg_block_omfg.txt b/test/yarp/fixtures/seattlerb/block_opt_splat_arg_block_omfg.txt
new file mode 100644
index 0000000000..76466f9d54
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_opt_splat_arg_block_omfg.txt
@@ -0,0 +1 @@
+a { |b=1, *c, d, &e| }
diff --git a/test/yarp/fixtures/seattlerb/block_optarg.txt b/test/yarp/fixtures/seattlerb/block_optarg.txt
new file mode 100644
index 0000000000..a471554da1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_optarg.txt
@@ -0,0 +1 @@
+a { |b = :c| }
diff --git a/test/yarp/fixtures/seattlerb/block_paren_splat.txt b/test/yarp/fixtures/seattlerb/block_paren_splat.txt
new file mode 100644
index 0000000000..3dd4bba1ed
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_paren_splat.txt
@@ -0,0 +1 @@
+a { |(b, *c)| }
diff --git a/test/yarp/fixtures/seattlerb/block_reg_optarg.txt b/test/yarp/fixtures/seattlerb/block_reg_optarg.txt
new file mode 100644
index 0000000000..c024651f78
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_reg_optarg.txt
@@ -0,0 +1 @@
+a { |b, c = :d| }
diff --git a/test/yarp/fixtures/seattlerb/block_return.txt b/test/yarp/fixtures/seattlerb/block_return.txt
new file mode 100644
index 0000000000..f30ba71d8f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_return.txt
@@ -0,0 +1 @@
+return foo arg do |bar| end
diff --git a/test/yarp/fixtures/seattlerb/block_scope.txt b/test/yarp/fixtures/seattlerb/block_scope.txt
new file mode 100644
index 0000000000..7a83d8ab87
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_scope.txt
@@ -0,0 +1 @@
+a { |;b| }
diff --git a/test/yarp/fixtures/seattlerb/block_splat_reg.txt b/test/yarp/fixtures/seattlerb/block_splat_reg.txt
new file mode 100644
index 0000000000..58f0619e5d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/block_splat_reg.txt
@@ -0,0 +1 @@
+a { |*b, c| }
diff --git a/test/yarp/fixtures/seattlerb/bug169.txt b/test/yarp/fixtures/seattlerb/bug169.txt
new file mode 100644
index 0000000000..db2e5ace5e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug169.txt
@@ -0,0 +1 @@
+m () {}
diff --git a/test/yarp/fixtures/seattlerb/bug179.txt b/test/yarp/fixtures/seattlerb/bug179.txt
new file mode 100644
index 0000000000..02ae07a3be
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug179.txt
@@ -0,0 +1 @@
+p ()..nil
diff --git a/test/yarp/fixtures/seattlerb/bug190.txt b/test/yarp/fixtures/seattlerb/bug190.txt
new file mode 100644
index 0000000000..861b2d305f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug190.txt
@@ -0,0 +1 @@
+%r'\''
diff --git a/test/yarp/fixtures/seattlerb/bug191.txt b/test/yarp/fixtures/seattlerb/bug191.txt
new file mode 100644
index 0000000000..03f7fd1228
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug191.txt
@@ -0,0 +1,3 @@
+a ? "": b
+
+a ? '': b
diff --git a/test/yarp/fixtures/seattlerb/bug202.txt b/test/yarp/fixtures/seattlerb/bug202.txt
new file mode 100644
index 0000000000..a3b06ffdfc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug202.txt
@@ -0,0 +1,2 @@
+$测试 = 1
+测试 = 1
diff --git a/test/yarp/fixtures/seattlerb/bug236.txt b/test/yarp/fixtures/seattlerb/bug236.txt
new file mode 100644
index 0000000000..cefe1eb058
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug236.txt
@@ -0,0 +1,3 @@
+x{|a,|}
+
+x{|a|}
diff --git a/test/yarp/fixtures/seattlerb/bug290.txt b/test/yarp/fixtures/seattlerb/bug290.txt
new file mode 100644
index 0000000000..dbcd28cd48
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug290.txt
@@ -0,0 +1,3 @@
+begin
+  foo
+end
diff --git a/test/yarp/fixtures/seattlerb/bug_187.txt b/test/yarp/fixtures/seattlerb/bug_187.txt
new file mode 100644
index 0000000000..1e1ecd8202
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_187.txt
@@ -0,0 +1,3 @@
+private def f
+a.b do end
+end
diff --git a/test/yarp/fixtures/seattlerb/bug_215.txt b/test/yarp/fixtures/seattlerb/bug_215.txt
new file mode 100644
index 0000000000..f0d09ba5ff
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_215.txt
@@ -0,0 +1 @@
+undef %s(foo)
diff --git a/test/yarp/fixtures/seattlerb/bug_249.txt b/test/yarp/fixtures/seattlerb/bug_249.txt
new file mode 100644
index 0000000000..ccccdf5326
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_249.txt
@@ -0,0 +1,4 @@
+mount (Class.new do
+def initialize
+end
+ end).new, :at => 'endpoint'
diff --git a/test/yarp/fixtures/seattlerb/bug_and.txt b/test/yarp/fixtures/seattlerb/bug_and.txt
new file mode 100644
index 0000000000..6243359a9e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_and.txt
@@ -0,0 +1,4 @@
+true and
+true
+
+true and []
diff --git a/test/yarp/fixtures/seattlerb/bug_args__19.txt b/test/yarp/fixtures/seattlerb/bug_args__19.txt
new file mode 100644
index 0000000000..08466554fd
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_args__19.txt
@@ -0,0 +1 @@
+f { |(a, b)| d }
diff --git a/test/yarp/fixtures/seattlerb/bug_args_masgn.txt b/test/yarp/fixtures/seattlerb/bug_args_masgn.txt
new file mode 100644
index 0000000000..e0a71e9197
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_args_masgn.txt
@@ -0,0 +1 @@
+f { |(a, b), c| }
diff --git a/test/yarp/fixtures/seattlerb/bug_args_masgn2.txt b/test/yarp/fixtures/seattlerb/bug_args_masgn2.txt
new file mode 100644
index 0000000000..2f12756bfe
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_args_masgn2.txt
@@ -0,0 +1 @@
+f { |((a, b), c), d| }
diff --git a/test/yarp/fixtures/seattlerb/bug_args_masgn_outer_parens__19.txt b/test/yarp/fixtures/seattlerb/bug_args_masgn_outer_parens__19.txt
new file mode 100644
index 0000000000..a2b0178676
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_args_masgn_outer_parens__19.txt
@@ -0,0 +1 @@
+f { |((k, v), i)| }
diff --git a/test/yarp/fixtures/seattlerb/bug_call_arglist_parens.txt b/test/yarp/fixtures/seattlerb/bug_call_arglist_parens.txt
new file mode 100644
index 0000000000..4f04368802
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_call_arglist_parens.txt
@@ -0,0 +1,11 @@
+      def f
+        g ( 1), 2
+      end
+
+
+      def f()
+        g (1), 2
+      end
+
+
+g ( 1), 2
diff --git a/test/yarp/fixtures/seattlerb/bug_case_when_regexp.txt b/test/yarp/fixtures/seattlerb/bug_case_when_regexp.txt
new file mode 100644
index 0000000000..2536696a42
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_case_when_regexp.txt
@@ -0,0 +1 @@
+case :x; when /x/ then end
diff --git a/test/yarp/fixtures/seattlerb/bug_comma.txt b/test/yarp/fixtures/seattlerb/bug_comma.txt
new file mode 100644
index 0000000000..d86f1ea9dd
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_comma.txt
@@ -0,0 +1 @@
+if test ?d, dir then end
diff --git a/test/yarp/fixtures/seattlerb/bug_cond_pct.txt b/test/yarp/fixtures/seattlerb/bug_cond_pct.txt
new file mode 100644
index 0000000000..1b4f90058e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_cond_pct.txt
@@ -0,0 +1 @@
+case; when %r%blahblah%; end
diff --git a/test/yarp/fixtures/seattlerb/bug_hash_args.txt b/test/yarp/fixtures/seattlerb/bug_hash_args.txt
new file mode 100644
index 0000000000..b815f8a666
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_hash_args.txt
@@ -0,0 +1 @@
+foo(:bar, baz: nil)
diff --git a/test/yarp/fixtures/seattlerb/bug_hash_args_trailing_comma.txt b/test/yarp/fixtures/seattlerb/bug_hash_args_trailing_comma.txt
new file mode 100644
index 0000000000..6057b245a5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_hash_args_trailing_comma.txt
@@ -0,0 +1 @@
+foo(:bar, baz: nil,)
diff --git a/test/yarp/fixtures/seattlerb/bug_hash_interp_array.txt b/test/yarp/fixtures/seattlerb/bug_hash_interp_array.txt
new file mode 100644
index 0000000000..01fe238056
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_hash_interp_array.txt
@@ -0,0 +1 @@
+{ "#{}": [] }
diff --git a/test/yarp/fixtures/seattlerb/bug_masgn_right.txt b/test/yarp/fixtures/seattlerb/bug_masgn_right.txt
new file mode 100644
index 0000000000..12ea7b8d62
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_masgn_right.txt
@@ -0,0 +1 @@
+f { |a, (b, c)| }
diff --git a/test/yarp/fixtures/seattlerb/bug_not_parens.txt b/test/yarp/fixtures/seattlerb/bug_not_parens.txt
new file mode 100644
index 0000000000..8847b7bec6
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_not_parens.txt
@@ -0,0 +1 @@
+not(a)
diff --git a/test/yarp/fixtures/seattlerb/bug_op_asgn_rescue.txt b/test/yarp/fixtures/seattlerb/bug_op_asgn_rescue.txt
new file mode 100644
index 0000000000..6a0b25cbdc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/bug_op_asgn_rescue.txt
@@ -0,0 +1 @@
+a ||= b rescue nil
diff --git a/test/yarp/fixtures/seattlerb/call_and.txt b/test/yarp/fixtures/seattlerb/call_and.txt
new file mode 100644
index 0000000000..c17be8f356
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_and.txt
@@ -0,0 +1 @@
+1 & 2
diff --git a/test/yarp/fixtures/seattlerb/call_arg_assoc.txt b/test/yarp/fixtures/seattlerb/call_arg_assoc.txt
new file mode 100644
index 0000000000..376c299be5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_arg_assoc.txt
@@ -0,0 +1 @@
+f(1, 2=>3)
diff --git a/test/yarp/fixtures/seattlerb/call_arg_assoc_kwsplat.txt b/test/yarp/fixtures/seattlerb/call_arg_assoc_kwsplat.txt
new file mode 100644
index 0000000000..a4be0fb62c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_arg_assoc_kwsplat.txt
@@ -0,0 +1 @@
+f(1, kw: 2, **3)
diff --git a/test/yarp/fixtures/seattlerb/call_arg_kwsplat.txt b/test/yarp/fixtures/seattlerb/call_arg_kwsplat.txt
new file mode 100644
index 0000000000..4848fd9e8d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_arg_kwsplat.txt
@@ -0,0 +1 @@
+a(b, **1)
diff --git a/test/yarp/fixtures/seattlerb/call_args_assoc_quoted.txt b/test/yarp/fixtures/seattlerb/call_args_assoc_quoted.txt
new file mode 100644
index 0000000000..0af2259577
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_args_assoc_quoted.txt
@@ -0,0 +1,5 @@
+x "#{k}":42
+
+x "k":42
+
+x 'k':42
diff --git a/test/yarp/fixtures/seattlerb/call_args_assoc_trailing_comma.txt b/test/yarp/fixtures/seattlerb/call_args_assoc_trailing_comma.txt
new file mode 100644
index 0000000000..6ad08f3238
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_args_assoc_trailing_comma.txt
@@ -0,0 +1 @@
+f(1, 2=>3,)
diff --git a/test/yarp/fixtures/seattlerb/call_args_command.txt b/test/yarp/fixtures/seattlerb/call_args_command.txt
new file mode 100644
index 0000000000..dd6df29c7b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_args_command.txt
@@ -0,0 +1 @@
+a.b c.d 1
diff --git a/test/yarp/fixtures/seattlerb/call_array_arg.txt b/test/yarp/fixtures/seattlerb/call_array_arg.txt
new file mode 100644
index 0000000000..5c724fa328
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_array_arg.txt
@@ -0,0 +1 @@
+1 == [:b, :c]
diff --git a/test/yarp/fixtures/seattlerb/call_array_block_call.txt b/test/yarp/fixtures/seattlerb/call_array_block_call.txt
new file mode 100644
index 0000000000..6d4c1b276e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_array_block_call.txt
@@ -0,0 +1 @@
+a [ nil, b do end ]
diff --git a/test/yarp/fixtures/seattlerb/call_array_lambda_block_call.txt b/test/yarp/fixtures/seattlerb/call_array_lambda_block_call.txt
new file mode 100644
index 0000000000..dc5b5807b2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_array_lambda_block_call.txt
@@ -0,0 +1,2 @@
+a [->() {}] do
+end
diff --git a/test/yarp/fixtures/seattlerb/call_array_lit_inline_hash.txt b/test/yarp/fixtures/seattlerb/call_array_lit_inline_hash.txt
new file mode 100644
index 0000000000..daba00947e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_array_lit_inline_hash.txt
@@ -0,0 +1 @@
+a([:b, :c => 1])
diff --git a/test/yarp/fixtures/seattlerb/call_assoc.txt b/test/yarp/fixtures/seattlerb/call_assoc.txt
new file mode 100644
index 0000000000..2adc1eee1c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_assoc.txt
@@ -0,0 +1 @@
+f(2=>3)
diff --git a/test/yarp/fixtures/seattlerb/call_assoc_new.txt b/test/yarp/fixtures/seattlerb/call_assoc_new.txt
new file mode 100644
index 0000000000..b8457bfdfc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_assoc_new.txt
@@ -0,0 +1 @@
+f(a:3)
diff --git a/test/yarp/fixtures/seattlerb/call_assoc_new_if_multiline.txt b/test/yarp/fixtures/seattlerb/call_assoc_new_if_multiline.txt
new file mode 100644
index 0000000000..fe0a37dabb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_assoc_new_if_multiline.txt
@@ -0,0 +1,5 @@
+a(b: if :c
+1
+else
+2
+end)
diff --git a/test/yarp/fixtures/seattlerb/call_assoc_trailing_comma.txt b/test/yarp/fixtures/seattlerb/call_assoc_trailing_comma.txt
new file mode 100644
index 0000000000..4d86a4541d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_assoc_trailing_comma.txt
@@ -0,0 +1 @@
+f(1=>2,)
diff --git a/test/yarp/fixtures/seattlerb/call_bang_command_call.txt b/test/yarp/fixtures/seattlerb/call_bang_command_call.txt
new file mode 100644
index 0000000000..4f3ba4b93c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_bang_command_call.txt
@@ -0,0 +1 @@
+! a.b 1
diff --git a/test/yarp/fixtures/seattlerb/call_bang_squiggle.txt b/test/yarp/fixtures/seattlerb/call_bang_squiggle.txt
new file mode 100644
index 0000000000..d7039f910a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_bang_squiggle.txt
@@ -0,0 +1 @@
+1 !~ 2
diff --git a/test/yarp/fixtures/seattlerb/call_begin_call_block_call.txt b/test/yarp/fixtures/seattlerb/call_begin_call_block_call.txt
new file mode 100644
index 0000000000..e9b43491fe
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_begin_call_block_call.txt
@@ -0,0 +1,3 @@
+a begin
+b.c do end
+end
diff --git a/test/yarp/fixtures/seattlerb/call_block_arg_named.txt b/test/yarp/fixtures/seattlerb/call_block_arg_named.txt
new file mode 100644
index 0000000000..08fea89d11
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_block_arg_named.txt
@@ -0,0 +1 @@
+x(&blk)
diff --git a/test/yarp/fixtures/seattlerb/call_carat.txt b/test/yarp/fixtures/seattlerb/call_carat.txt
new file mode 100644
index 0000000000..3e88c09837
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_carat.txt
@@ -0,0 +1 @@
+1 ^ 2
diff --git a/test/yarp/fixtures/seattlerb/call_colon2.txt b/test/yarp/fixtures/seattlerb/call_colon2.txt
new file mode 100644
index 0000000000..47aab7e637
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_colon2.txt
@@ -0,0 +1 @@
+A::b
diff --git a/test/yarp/fixtures/seattlerb/call_colon_parens.txt b/test/yarp/fixtures/seattlerb/call_colon_parens.txt
new file mode 100644
index 0000000000..51ed4df11b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_colon_parens.txt
@@ -0,0 +1 @@
+1::()
diff --git a/test/yarp/fixtures/seattlerb/call_div.txt b/test/yarp/fixtures/seattlerb/call_div.txt
new file mode 100644
index 0000000000..85b4d7b0b0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_div.txt
@@ -0,0 +1 @@
+1 / 2
diff --git a/test/yarp/fixtures/seattlerb/call_dot_parens.txt b/test/yarp/fixtures/seattlerb/call_dot_parens.txt
new file mode 100644
index 0000000000..0270596a07
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_dot_parens.txt
@@ -0,0 +1 @@
+1.()
diff --git a/test/yarp/fixtures/seattlerb/call_env.txt b/test/yarp/fixtures/seattlerb/call_env.txt
new file mode 100644
index 0000000000..dadc0d3861
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_env.txt
@@ -0,0 +1 @@
+a.happy
diff --git a/test/yarp/fixtures/seattlerb/call_eq3.txt b/test/yarp/fixtures/seattlerb/call_eq3.txt
new file mode 100644
index 0000000000..6a2fb465cb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_eq3.txt
@@ -0,0 +1 @@
+1 === 2
diff --git a/test/yarp/fixtures/seattlerb/call_gt.txt b/test/yarp/fixtures/seattlerb/call_gt.txt
new file mode 100644
index 0000000000..9d0a1caa90
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_gt.txt
@@ -0,0 +1 @@
+1 > 2
diff --git a/test/yarp/fixtures/seattlerb/call_kwsplat.txt b/test/yarp/fixtures/seattlerb/call_kwsplat.txt
new file mode 100644
index 0000000000..eda700c3e1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_kwsplat.txt
@@ -0,0 +1 @@
+a(**1)
diff --git a/test/yarp/fixtures/seattlerb/call_leading_dots.txt b/test/yarp/fixtures/seattlerb/call_leading_dots.txt
new file mode 100644
index 0000000000..1e7b2e5179
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_leading_dots.txt
@@ -0,0 +1,3 @@
+a
+.b
+.c
diff --git a/test/yarp/fixtures/seattlerb/call_leading_dots_comment.txt b/test/yarp/fixtures/seattlerb/call_leading_dots_comment.txt
new file mode 100644
index 0000000000..c5deec5642
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_leading_dots_comment.txt
@@ -0,0 +1,4 @@
+a
+.b
+#.c
+.d
diff --git a/test/yarp/fixtures/seattlerb/call_lt.txt b/test/yarp/fixtures/seattlerb/call_lt.txt
new file mode 100644
index 0000000000..17e69c79b5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_lt.txt
@@ -0,0 +1 @@
+1 < 2
diff --git a/test/yarp/fixtures/seattlerb/call_lte.txt b/test/yarp/fixtures/seattlerb/call_lte.txt
new file mode 100644
index 0000000000..7574027634
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_lte.txt
@@ -0,0 +1 @@
+1 <= 2
diff --git a/test/yarp/fixtures/seattlerb/call_not.txt b/test/yarp/fixtures/seattlerb/call_not.txt
new file mode 100644
index 0000000000..51e4742f55
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_not.txt
@@ -0,0 +1 @@
+not 42
diff --git a/test/yarp/fixtures/seattlerb/call_pipe.txt b/test/yarp/fixtures/seattlerb/call_pipe.txt
new file mode 100644
index 0000000000..1555910665
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_pipe.txt
@@ -0,0 +1 @@
+1 | 2
diff --git a/test/yarp/fixtures/seattlerb/call_rshift.txt b/test/yarp/fixtures/seattlerb/call_rshift.txt
new file mode 100644
index 0000000000..9ff1def4e0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_rshift.txt
@@ -0,0 +1 @@
+1 >> 2
diff --git a/test/yarp/fixtures/seattlerb/call_self_brackets.txt b/test/yarp/fixtures/seattlerb/call_self_brackets.txt
new file mode 100644
index 0000000000..6533df2ce0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_self_brackets.txt
@@ -0,0 +1 @@
+self[1]
diff --git a/test/yarp/fixtures/seattlerb/call_spaceship.txt b/test/yarp/fixtures/seattlerb/call_spaceship.txt
new file mode 100644
index 0000000000..905c3a1c46
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_spaceship.txt
@@ -0,0 +1 @@
+1 <=> 2
diff --git a/test/yarp/fixtures/seattlerb/call_stabby_do_end_with_block.txt b/test/yarp/fixtures/seattlerb/call_stabby_do_end_with_block.txt
new file mode 100644
index 0000000000..2d1afdad28
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_stabby_do_end_with_block.txt
@@ -0,0 +1 @@
+a -> do 1 end do 2 end
diff --git a/test/yarp/fixtures/seattlerb/call_stabby_with_braces_block.txt b/test/yarp/fixtures/seattlerb/call_stabby_with_braces_block.txt
new file mode 100644
index 0000000000..0d995a04d1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_stabby_with_braces_block.txt
@@ -0,0 +1 @@
+a -> { 1 } do 2 end
diff --git a/test/yarp/fixtures/seattlerb/call_star.txt b/test/yarp/fixtures/seattlerb/call_star.txt
new file mode 100644
index 0000000000..096ec022d4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_star.txt
@@ -0,0 +1 @@
+1 * 2
diff --git a/test/yarp/fixtures/seattlerb/call_star2.txt b/test/yarp/fixtures/seattlerb/call_star2.txt
new file mode 100644
index 0000000000..bef4719d3c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_star2.txt
@@ -0,0 +1 @@
+1 ** 2
diff --git a/test/yarp/fixtures/seattlerb/call_trailing_comma.txt b/test/yarp/fixtures/seattlerb/call_trailing_comma.txt
new file mode 100644
index 0000000000..e9a3ca35be
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_trailing_comma.txt
@@ -0,0 +1 @@
+f(1,)
diff --git a/test/yarp/fixtures/seattlerb/call_trailing_dots.txt b/test/yarp/fixtures/seattlerb/call_trailing_dots.txt
new file mode 100644
index 0000000000..960cdbb45f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_trailing_dots.txt
@@ -0,0 +1,3 @@
+a.
+b.
+c
diff --git a/test/yarp/fixtures/seattlerb/call_unary_bang.txt b/test/yarp/fixtures/seattlerb/call_unary_bang.txt
new file mode 100644
index 0000000000..91f702d4a9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/call_unary_bang.txt
@@ -0,0 +1 @@
+!1
diff --git a/test/yarp/fixtures/seattlerb/case_in.txt b/test/yarp/fixtures/seattlerb/case_in.txt
new file mode 100644
index 0000000000..f28c286348
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in.txt
@@ -0,0 +1,111 @@
+case :a
+in  "b":
+end
+
+case :a
+in %I[a b]
+end
+
+case :a
+in %W[a b]
+end
+
+case :a
+in %i[a b]
+end
+
+case :a
+in %w[a b]
+end
+
+case :a
+in (...10)
+end
+
+case :a
+in (..10)
+end
+
+case :a
+in (1...)
+end
+
+case :a
+in (1...3)
+end
+
+case :a
+in (42)
+end
+
+case :a
+in **nil
+end
+
+case :a
+in /regexp/
+end
+
+case :a
+in :b, *_, :c
+end
+
+case :a
+in :b, [:c]
+end
+
+case :a
+in Symbol()
+end
+
+case :a
+in Symbol(*lhs, x, *rhs)
+end
+
+case :a
+in Symbol[*lhs, x, *rhs]
+end
+
+case :a
+in [->(b) { true }, c]
+end
+
+case :a
+in [:a, b, c, [:d, *e, nil]]
+end
+
+case :a
+in [A, *, B]
+end
+
+case :a
+in [[:b, c], [:d, ^e]]
+end
+
+case :a
+in []
+end
+
+case :a
+in [^(a)]
+end
+
+case :a
+in [^@a, ^$b, ^@@c]
+end
+
+case :a
+in `echo hi`
+end
+
+case :a
+in nil, nil, nil
+end
+
+case :a
+in { "b": }
+end
+
+case :a
+in {}
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_31.txt b/test/yarp/fixtures/seattlerb/case_in_31.txt
new file mode 100644
index 0000000000..b9bf25b132
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_31.txt
@@ -0,0 +1,4 @@
+case :a
+in [:b, *c]
+  :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_37.txt b/test/yarp/fixtures/seattlerb/case_in_37.txt
new file mode 100644
index 0000000000..25b6fb9261
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_37.txt
@@ -0,0 +1,4 @@
+case :a
+in { b: [Hash, *] }
+  :c
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_42.txt b/test/yarp/fixtures/seattlerb/case_in_42.txt
new file mode 100644
index 0000000000..bc6a2233f5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_42.txt
@@ -0,0 +1,3 @@
+case :a
+in :b, *_ then nil
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_42_2.txt b/test/yarp/fixtures/seattlerb/case_in_42_2.txt
new file mode 100644
index 0000000000..ce4b65a5d0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_42_2.txt
@@ -0,0 +1,3 @@
+case :a
+in A(*list) then nil
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_47.txt b/test/yarp/fixtures/seattlerb/case_in_47.txt
new file mode 100644
index 0000000000..60f17ed7ce
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_47.txt
@@ -0,0 +1,4 @@
+case :a
+in [*, :b, :c]
+  :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_67.txt b/test/yarp/fixtures/seattlerb/case_in_67.txt
new file mode 100644
index 0000000000..c1c55e68c7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_67.txt
@@ -0,0 +1,3 @@
+case :a
+in 1.. then nil
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_86.txt b/test/yarp/fixtures/seattlerb/case_in_86.txt
new file mode 100644
index 0000000000..63ba92e533
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_86.txt
@@ -0,0 +1,3 @@
+case [:a, :b]
+in ::NilClass, * then nil
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_86_2.txt b/test/yarp/fixtures/seattlerb/case_in_86_2.txt
new file mode 100644
index 0000000000..4ad16c451a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_86_2.txt
@@ -0,0 +1,3 @@
+case [:a, :b]
+in *, ::NilClass then nil
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_array_pat_const.txt b/test/yarp/fixtures/seattlerb/case_in_array_pat_const.txt
new file mode 100644
index 0000000000..8551e48e2c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_array_pat_const.txt
@@ -0,0 +1,4 @@
+case :a
+in B[c]
+  :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_array_pat_const2.txt b/test/yarp/fixtures/seattlerb/case_in_array_pat_const2.txt
new file mode 100644
index 0000000000..fca423ea61
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_array_pat_const2.txt
@@ -0,0 +1,4 @@
+case :a
+in B::C[d]
+  :e
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_array_pat_paren_assign.txt b/test/yarp/fixtures/seattlerb/case_in_array_pat_paren_assign.txt
new file mode 100644
index 0000000000..c56f728337
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_array_pat_paren_assign.txt
@@ -0,0 +1,4 @@
+case :a
+in B(C => d)
+  :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_const.txt b/test/yarp/fixtures/seattlerb/case_in_const.txt
new file mode 100644
index 0000000000..5b0dcc18e2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_const.txt
@@ -0,0 +1,4 @@
+case Array
+in Class
+  :b
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_else.txt b/test/yarp/fixtures/seattlerb/case_in_else.txt
new file mode 100644
index 0000000000..6f096862c5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_else.txt
@@ -0,0 +1,7 @@
+case Array
+in Class
+  :b
+else
+  :c
+end
+
diff --git a/test/yarp/fixtures/seattlerb/case_in_find.txt b/test/yarp/fixtures/seattlerb/case_in_find.txt
new file mode 100644
index 0000000000..476fcabe11
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_find.txt
@@ -0,0 +1,3 @@
+case :a
+  in *a, :+, *b
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_find_array.txt b/test/yarp/fixtures/seattlerb/case_in_find_array.txt
new file mode 100644
index 0000000000..5eb4010b7f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_find_array.txt
@@ -0,0 +1,3 @@
+case :a
+in [*, :b, c, *]
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_hash_pat.txt b/test/yarp/fixtures/seattlerb/case_in_hash_pat.txt
new file mode 100644
index 0000000000..cb012e8d99
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_hash_pat.txt
@@ -0,0 +1,5 @@
+case :a
+in { b: 'c', d: "e" } then
+  :f
+end
+
diff --git a/test/yarp/fixtures/seattlerb/case_in_hash_pat_assign.txt b/test/yarp/fixtures/seattlerb/case_in_hash_pat_assign.txt
new file mode 100644
index 0000000000..58fd59ff9c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_hash_pat_assign.txt
@@ -0,0 +1,4 @@
+case :a
+in { b: Integer => x, d: "e", f: } then
+  :g
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_hash_pat_paren_assign.txt b/test/yarp/fixtures/seattlerb/case_in_hash_pat_paren_assign.txt
new file mode 100644
index 0000000000..de3a10740c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_hash_pat_paren_assign.txt
@@ -0,0 +1,4 @@
+case :a
+in B(a: 42)
+  :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_hash_pat_paren_true.txt b/test/yarp/fixtures/seattlerb/case_in_hash_pat_paren_true.txt
new file mode 100644
index 0000000000..449fd0d4d4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_hash_pat_paren_true.txt
@@ -0,0 +1,5 @@
+case :a
+in b: true then
+  :c
+end
+
diff --git a/test/yarp/fixtures/seattlerb/case_in_hash_pat_rest.txt b/test/yarp/fixtures/seattlerb/case_in_hash_pat_rest.txt
new file mode 100644
index 0000000000..6f67cb1d10
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_hash_pat_rest.txt
@@ -0,0 +1,3 @@
+case :a
+in b: c, **rest then :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_hash_pat_rest_solo.txt b/test/yarp/fixtures/seattlerb/case_in_hash_pat_rest_solo.txt
new file mode 100644
index 0000000000..91d0592412
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_hash_pat_rest_solo.txt
@@ -0,0 +1,3 @@
+case :a
+in **rest then :d
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_if_unless_post_mod.txt b/test/yarp/fixtures/seattlerb/case_in_if_unless_post_mod.txt
new file mode 100644
index 0000000000..dbe24a5c8a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_if_unless_post_mod.txt
@@ -0,0 +1,6 @@
+case :a
+in A if true
+  :C
+in D unless false
+  :E
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_multiple.txt b/test/yarp/fixtures/seattlerb/case_in_multiple.txt
new file mode 100644
index 0000000000..1b6dd06cfe
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_multiple.txt
@@ -0,0 +1,6 @@
+case :a
+in A::B
+  :C
+in D::E
+  :F
+end
diff --git a/test/yarp/fixtures/seattlerb/case_in_or.txt b/test/yarp/fixtures/seattlerb/case_in_or.txt
new file mode 100644
index 0000000000..875e37749f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/case_in_or.txt
@@ -0,0 +1,5 @@
+case :a
+in B | C
+  :d
+end
+
diff --git a/test/yarp/fixtures/seattlerb/class_comments.txt b/test/yarp/fixtures/seattlerb/class_comments.txt
new file mode 100644
index 0000000000..9701eca7e5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/class_comments.txt
@@ -0,0 +1,9 @@
+# blah 1
+# blah 2
+
+class X
+  # blah 3
+  def blah
+    # blah 4
+  end
+end
diff --git a/test/yarp/fixtures/seattlerb/cond_unary_minus.txt b/test/yarp/fixtures/seattlerb/cond_unary_minus.txt
new file mode 100644
index 0000000000..80293115da
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/cond_unary_minus.txt
@@ -0,0 +1 @@
+if -1; end
diff --git a/test/yarp/fixtures/seattlerb/const_2_op_asgn_or2.txt b/test/yarp/fixtures/seattlerb/const_2_op_asgn_or2.txt
new file mode 100644
index 0000000000..6912c2d76b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/const_2_op_asgn_or2.txt
@@ -0,0 +1 @@
+::X::Y ||= 1
diff --git a/test/yarp/fixtures/seattlerb/const_3_op_asgn_or.txt b/test/yarp/fixtures/seattlerb/const_3_op_asgn_or.txt
new file mode 100644
index 0000000000..bbcd25a369
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/const_3_op_asgn_or.txt
@@ -0,0 +1 @@
+::X ||= 1
diff --git a/test/yarp/fixtures/seattlerb/const_op_asgn_and1.txt b/test/yarp/fixtures/seattlerb/const_op_asgn_and1.txt
new file mode 100644
index 0000000000..3964df0ead
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/const_op_asgn_and1.txt
@@ -0,0 +1 @@
+::X &= 1
diff --git a/test/yarp/fixtures/seattlerb/const_op_asgn_and2.txt b/test/yarp/fixtures/seattlerb/const_op_asgn_and2.txt
new file mode 100644
index 0000000000..1bef4b4154
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/const_op_asgn_and2.txt
@@ -0,0 +1 @@
+::X &&= 1
diff --git a/test/yarp/fixtures/seattlerb/const_op_asgn_or.txt b/test/yarp/fixtures/seattlerb/const_op_asgn_or.txt
new file mode 100644
index 0000000000..729e425262
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/const_op_asgn_or.txt
@@ -0,0 +1 @@
+X::Y ||= 1
diff --git a/test/yarp/fixtures/seattlerb/dasgn_icky2.txt b/test/yarp/fixtures/seattlerb/dasgn_icky2.txt
new file mode 100644
index 0000000000..2f50d32304
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dasgn_icky2.txt
@@ -0,0 +1,8 @@
+a do
+  v = nil
+  begin
+    yield
+  rescue Exception => v
+    break
+  end
+end
diff --git a/test/yarp/fixtures/seattlerb/defined_eh_parens.txt b/test/yarp/fixtures/seattlerb/defined_eh_parens.txt
new file mode 100644
index 0000000000..5ca5d9f4c4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defined_eh_parens.txt
@@ -0,0 +1 @@
+defined?(42)
diff --git a/test/yarp/fixtures/seattlerb/defn_arg_asplat_arg.txt b/test/yarp/fixtures/seattlerb/defn_arg_asplat_arg.txt
new file mode 100644
index 0000000000..f629a5de60
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_arg_asplat_arg.txt
@@ -0,0 +1 @@
+def call(interp, *, args) end
diff --git a/test/yarp/fixtures/seattlerb/defn_arg_forward_args.txt b/test/yarp/fixtures/seattlerb/defn_arg_forward_args.txt
new file mode 100644
index 0000000000..500e2e1fe0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_arg_forward_args.txt
@@ -0,0 +1 @@
+def a(x, ...); b(x, ...); end
diff --git a/test/yarp/fixtures/seattlerb/defn_args_forward_args.txt b/test/yarp/fixtures/seattlerb/defn_args_forward_args.txt
new file mode 100644
index 0000000000..fc1ee138de
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_args_forward_args.txt
@@ -0,0 +1 @@
+def a(x, y, z, ...); b(:get, z, ...); end
diff --git a/test/yarp/fixtures/seattlerb/defn_comments.txt b/test/yarp/fixtures/seattlerb/defn_comments.txt
new file mode 100644
index 0000000000..04c7ea1a10
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_comments.txt
@@ -0,0 +1,5 @@
+# blah 1
+# blah 2
+
+def blah
+end
diff --git a/test/yarp/fixtures/seattlerb/defn_endless_command.txt b/test/yarp/fixtures/seattlerb/defn_endless_command.txt
new file mode 100644
index 0000000000..172de2ca6c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_endless_command.txt
@@ -0,0 +1 @@
+def some_method = other_method 42
diff --git a/test/yarp/fixtures/seattlerb/defn_endless_command_rescue.txt b/test/yarp/fixtures/seattlerb/defn_endless_command_rescue.txt
new file mode 100644
index 0000000000..05ed392e38
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_endless_command_rescue.txt
@@ -0,0 +1 @@
+def some_method = other_method 42 rescue 24
diff --git a/test/yarp/fixtures/seattlerb/defn_forward_args.txt b/test/yarp/fixtures/seattlerb/defn_forward_args.txt
new file mode 100644
index 0000000000..46ed199875
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_forward_args.txt
@@ -0,0 +1 @@
+def a(...); b(...); end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_env.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_env.txt
new file mode 100644
index 0000000000..b512677195
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_env.txt
@@ -0,0 +1 @@
+def test(**testing) test_splat(**testing) end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_kwarg.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_kwarg.txt
new file mode 100644
index 0000000000..3962d2645c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_kwarg.txt
@@ -0,0 +1 @@
+def f(a, b: 1, c: 2) end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_kwsplat.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_kwsplat.txt
new file mode 100644
index 0000000000..bd39819482
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_kwsplat.txt
@@ -0,0 +1 @@
+def a(b: 1, **c) end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_kwsplat_anon.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_kwsplat_anon.txt
new file mode 100644
index 0000000000..aba71cba07
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_kwsplat_anon.txt
@@ -0,0 +1 @@
+def a(b: 1, **) end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_lvar.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_lvar.txt
new file mode 100644
index 0000000000..9eac108cca
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_lvar.txt
@@ -0,0 +1 @@
+def fun(kw: :val); kw; end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_no_parens.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_no_parens.txt
new file mode 100644
index 0000000000..481457bf0e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_no_parens.txt
@@ -0,0 +1,2 @@
+def f a: 1
+end
diff --git a/test/yarp/fixtures/seattlerb/defn_kwarg_val.txt b/test/yarp/fixtures/seattlerb/defn_kwarg_val.txt
new file mode 100644
index 0000000000..1a2803926f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_kwarg_val.txt
@@ -0,0 +1 @@
+def f(a, b:1) end
diff --git a/test/yarp/fixtures/seattlerb/defn_no_kwargs.txt b/test/yarp/fixtures/seattlerb/defn_no_kwargs.txt
new file mode 100644
index 0000000000..857ec8debb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_no_kwargs.txt
@@ -0,0 +1 @@
+def x(**nil); end
diff --git a/test/yarp/fixtures/seattlerb/defn_oneliner.txt b/test/yarp/fixtures/seattlerb/defn_oneliner.txt
new file mode 100644
index 0000000000..4aef08ce46
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_oneliner.txt
@@ -0,0 +1 @@
+def exec(cmd) = system(cmd)
diff --git a/test/yarp/fixtures/seattlerb/defn_oneliner_eq2.txt b/test/yarp/fixtures/seattlerb/defn_oneliner_eq2.txt
new file mode 100644
index 0000000000..1b1ce27a15
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_oneliner_eq2.txt
@@ -0,0 +1,3 @@
+class X
+  def ==(o) = 42
+end
diff --git a/test/yarp/fixtures/seattlerb/defn_oneliner_noargs.txt b/test/yarp/fixtures/seattlerb/defn_oneliner_noargs.txt
new file mode 100644
index 0000000000..cb4f76d244
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_oneliner_noargs.txt
@@ -0,0 +1 @@
+def exec = system
diff --git a/test/yarp/fixtures/seattlerb/defn_oneliner_noargs_parentheses.txt b/test/yarp/fixtures/seattlerb/defn_oneliner_noargs_parentheses.txt
new file mode 100644
index 0000000000..c582e896c1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_oneliner_noargs_parentheses.txt
@@ -0,0 +1 @@
+def exec() = system
diff --git a/test/yarp/fixtures/seattlerb/defn_oneliner_rescue.txt b/test/yarp/fixtures/seattlerb/defn_oneliner_rescue.txt
new file mode 100644
index 0000000000..ffe2228c9d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_oneliner_rescue.txt
@@ -0,0 +1,13 @@
+def exec(cmd)
+  system(cmd)
+rescue
+  nil
+end
+
+
+def exec(cmd)
+  system(cmd) rescue nil
+end
+
+
+def exec(cmd) = system(cmd) rescue nil
diff --git a/test/yarp/fixtures/seattlerb/defn_opt_last_arg.txt b/test/yarp/fixtures/seattlerb/defn_opt_last_arg.txt
new file mode 100644
index 0000000000..91500bf137
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_opt_last_arg.txt
@@ -0,0 +1,2 @@
+def m arg = false
+end
diff --git a/test/yarp/fixtures/seattlerb/defn_opt_reg.txt b/test/yarp/fixtures/seattlerb/defn_opt_reg.txt
new file mode 100644
index 0000000000..c665674bc4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_opt_reg.txt
@@ -0,0 +1 @@
+def f(a=nil, b) end
diff --git a/test/yarp/fixtures/seattlerb/defn_opt_splat_arg.txt b/test/yarp/fixtures/seattlerb/defn_opt_splat_arg.txt
new file mode 100644
index 0000000000..876398b478
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_opt_splat_arg.txt
@@ -0,0 +1 @@
+def f (a = 1, *b, c) end
diff --git a/test/yarp/fixtures/seattlerb/defn_powarg.txt b/test/yarp/fixtures/seattlerb/defn_powarg.txt
new file mode 100644
index 0000000000..73415f0db9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_powarg.txt
@@ -0,0 +1 @@
+def f(**opts) end
diff --git a/test/yarp/fixtures/seattlerb/defn_reg_opt_reg.txt b/test/yarp/fixtures/seattlerb/defn_reg_opt_reg.txt
new file mode 100644
index 0000000000..69f501a38e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_reg_opt_reg.txt
@@ -0,0 +1 @@
+def f(a, b = :c, d) end
diff --git a/test/yarp/fixtures/seattlerb/defn_splat_arg.txt b/test/yarp/fixtures/seattlerb/defn_splat_arg.txt
new file mode 100644
index 0000000000..a2a84bed30
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_splat_arg.txt
@@ -0,0 +1 @@
+def f(*, a) end
diff --git a/test/yarp/fixtures/seattlerb/defn_unary_not.txt b/test/yarp/fixtures/seattlerb/defn_unary_not.txt
new file mode 100644
index 0000000000..fb83c84a13
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defn_unary_not.txt
@@ -0,0 +1 @@
+def !@; true; end
diff --git a/test/yarp/fixtures/seattlerb/defns_reserved.txt b/test/yarp/fixtures/seattlerb/defns_reserved.txt
new file mode 100644
index 0000000000..7de9322f0d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defns_reserved.txt
@@ -0,0 +1 @@
+def self.return; end
diff --git a/test/yarp/fixtures/seattlerb/defs_as_arg_with_do_block_inside.txt b/test/yarp/fixtures/seattlerb/defs_as_arg_with_do_block_inside.txt
new file mode 100644
index 0000000000..4d493d73dd
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_as_arg_with_do_block_inside.txt
@@ -0,0 +1 @@
+p def self.b; x.y do; end; end
diff --git a/test/yarp/fixtures/seattlerb/defs_comments.txt b/test/yarp/fixtures/seattlerb/defs_comments.txt
new file mode 100644
index 0000000000..52b9b4a6b3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_comments.txt
@@ -0,0 +1,5 @@
+# blah 1
+# blah 2
+
+def self.blah
+end
diff --git a/test/yarp/fixtures/seattlerb/defs_endless_command.txt b/test/yarp/fixtures/seattlerb/defs_endless_command.txt
new file mode 100644
index 0000000000..3b605657de
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_endless_command.txt
@@ -0,0 +1 @@
+def x.some_method = other_method 42
diff --git a/test/yarp/fixtures/seattlerb/defs_endless_command_rescue.txt b/test/yarp/fixtures/seattlerb/defs_endless_command_rescue.txt
new file mode 100644
index 0000000000..6ece366db0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_endless_command_rescue.txt
@@ -0,0 +1 @@
+def x.some_method = other_method 42 rescue 24
diff --git a/test/yarp/fixtures/seattlerb/defs_kwarg.txt b/test/yarp/fixtures/seattlerb/defs_kwarg.txt
new file mode 100644
index 0000000000..59970a371e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_kwarg.txt
@@ -0,0 +1,2 @@
+def self.a b: 1
+end
diff --git a/test/yarp/fixtures/seattlerb/defs_oneliner.txt b/test/yarp/fixtures/seattlerb/defs_oneliner.txt
new file mode 100644
index 0000000000..1867edcfbf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_oneliner.txt
@@ -0,0 +1 @@
+def self.exec(cmd) = system(cmd)
diff --git a/test/yarp/fixtures/seattlerb/defs_oneliner_eq2.txt b/test/yarp/fixtures/seattlerb/defs_oneliner_eq2.txt
new file mode 100644
index 0000000000..1e55f68bf3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_oneliner_eq2.txt
@@ -0,0 +1,3 @@
+class X
+  def self.==(o) = 42
+end
diff --git a/test/yarp/fixtures/seattlerb/defs_oneliner_rescue.txt b/test/yarp/fixtures/seattlerb/defs_oneliner_rescue.txt
new file mode 100644
index 0000000000..7a04012b8f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/defs_oneliner_rescue.txt
@@ -0,0 +1,13 @@
+def self.exec(cmd)
+  system(cmd)
+rescue
+  nil
+end
+
+
+def self.exec(cmd)
+  system(cmd) rescue nil
+end
+
+
+def self.exec(cmd) = system(cmd) rescue nil
diff --git a/test/yarp/fixtures/seattlerb/do_bug.txt b/test/yarp/fixtures/seattlerb/do_bug.txt
new file mode 100644
index 0000000000..a274e72baf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/do_bug.txt
@@ -0,0 +1,4 @@
+a 1
+a.b do |c|
+  # do nothing
+end
diff --git a/test/yarp/fixtures/seattlerb/do_lambda.txt b/test/yarp/fixtures/seattlerb/do_lambda.txt
new file mode 100644
index 0000000000..06d2a38d30
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/do_lambda.txt
@@ -0,0 +1 @@
+->() do end
diff --git a/test/yarp/fixtures/seattlerb/dot2_nil__26.txt b/test/yarp/fixtures/seattlerb/dot2_nil__26.txt
new file mode 100644
index 0000000000..cc070eb69f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dot2_nil__26.txt
@@ -0,0 +1 @@
+a..
diff --git a/test/yarp/fixtures/seattlerb/dot3_nil__26.txt b/test/yarp/fixtures/seattlerb/dot3_nil__26.txt
new file mode 100644
index 0000000000..7f4aef7af7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dot3_nil__26.txt
@@ -0,0 +1 @@
+a...
diff --git a/test/yarp/fixtures/seattlerb/dstr_evstr.txt b/test/yarp/fixtures/seattlerb/dstr_evstr.txt
new file mode 100644
index 0000000000..5fe4a858c1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dstr_evstr.txt
@@ -0,0 +1 @@
+"#{'a'}#{b}"
diff --git a/test/yarp/fixtures/seattlerb/dstr_evstr_empty_end.txt b/test/yarp/fixtures/seattlerb/dstr_evstr_empty_end.txt
new file mode 100644
index 0000000000..7a55030fa8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dstr_evstr_empty_end.txt
@@ -0,0 +1 @@
+:"#{field}"
diff --git a/test/yarp/fixtures/seattlerb/dstr_lex_state.txt b/test/yarp/fixtures/seattlerb/dstr_lex_state.txt
new file mode 100644
index 0000000000..6cac1d8e95
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dstr_lex_state.txt
@@ -0,0 +1 @@
+"#{p:a}"
diff --git a/test/yarp/fixtures/seattlerb/dstr_str.txt b/test/yarp/fixtures/seattlerb/dstr_str.txt
new file mode 100644
index 0000000000..226ce2b191
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dstr_str.txt
@@ -0,0 +1 @@
+"#{'a'} b"
diff --git a/test/yarp/fixtures/seattlerb/dsym_esc_to_sym.txt b/test/yarp/fixtures/seattlerb/dsym_esc_to_sym.txt
new file mode 100644
index 0000000000..e5781453c1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dsym_esc_to_sym.txt
@@ -0,0 +1 @@
+:"Variet\303\240"
diff --git a/test/yarp/fixtures/seattlerb/dsym_to_sym.txt b/test/yarp/fixtures/seattlerb/dsym_to_sym.txt
new file mode 100644
index 0000000000..813c90342c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/dsym_to_sym.txt
@@ -0,0 +1,3 @@
+alias :"<<" :">>"
+
+alias :<< :>>
diff --git a/test/yarp/fixtures/seattlerb/eq_begin_line_numbers.txt b/test/yarp/fixtures/seattlerb/eq_begin_line_numbers.txt
new file mode 100644
index 0000000000..aae82e1207
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/eq_begin_line_numbers.txt
@@ -0,0 +1,6 @@
+1
+=begin
+comment
+comment
+=end
+2
diff --git a/test/yarp/fixtures/seattlerb/eq_begin_why_wont_people_use_their_spacebar.txt b/test/yarp/fixtures/seattlerb/eq_begin_why_wont_people_use_their_spacebar.txt
new file mode 100644
index 0000000000..88ff599e91
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/eq_begin_why_wont_people_use_their_spacebar.txt
@@ -0,0 +1,3 @@
+h[k]=begin
+       42
+     end
diff --git a/test/yarp/fixtures/seattlerb/evstr_evstr.txt b/test/yarp/fixtures/seattlerb/evstr_evstr.txt
new file mode 100644
index 0000000000..cf0b5ee873
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/evstr_evstr.txt
@@ -0,0 +1 @@
+"#{a}#{b}"
diff --git a/test/yarp/fixtures/seattlerb/evstr_str.txt b/test/yarp/fixtures/seattlerb/evstr_str.txt
new file mode 100644
index 0000000000..5746909b19
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/evstr_str.txt
@@ -0,0 +1 @@
+"#{a} b"
diff --git a/test/yarp/fixtures/seattlerb/expr_not_bang.txt b/test/yarp/fixtures/seattlerb/expr_not_bang.txt
new file mode 100644
index 0000000000..6ed80c76d3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/expr_not_bang.txt
@@ -0,0 +1 @@
+! a b
diff --git a/test/yarp/fixtures/seattlerb/f_kw.txt b/test/yarp/fixtures/seattlerb/f_kw.txt
new file mode 100644
index 0000000000..4dd42662b8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/f_kw.txt
@@ -0,0 +1 @@
+def x k:42; end
diff --git a/test/yarp/fixtures/seattlerb/f_kw__required.txt b/test/yarp/fixtures/seattlerb/f_kw__required.txt
new file mode 100644
index 0000000000..2e1e258ff0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/f_kw__required.txt
@@ -0,0 +1 @@
+def x k:; end
diff --git a/test/yarp/fixtures/seattlerb/flip2_env_lvar.txt b/test/yarp/fixtures/seattlerb/flip2_env_lvar.txt
new file mode 100644
index 0000000000..619b2c915e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/flip2_env_lvar.txt
@@ -0,0 +1 @@
+if a..b then end
diff --git a/test/yarp/fixtures/seattlerb/float_with_if_modifier.txt b/test/yarp/fixtures/seattlerb/float_with_if_modifier.txt
new file mode 100644
index 0000000000..6a62d4a308
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/float_with_if_modifier.txt
@@ -0,0 +1 @@
+1.0if true
diff --git a/test/yarp/fixtures/seattlerb/heredoc__backslash_dos_format.txt b/test/yarp/fixtures/seattlerb/heredoc__backslash_dos_format.txt
new file mode 100644
index 0000000000..cfbcb2a11d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc__backslash_dos_format.txt
@@ -0,0 +1,5 @@
+str = <<-XXX

+before\

+after

+XXX

+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_backslash_nl.txt b/test/yarp/fixtures/seattlerb/heredoc_backslash_nl.txt
new file mode 100644
index 0000000000..0cc5b35fd5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_backslash_nl.txt
@@ -0,0 +1,8 @@
+"  why would someone do this? \
+  blah
+"
+
+<<-DESC
+  why would someone do this? \
+  blah
+DESC
diff --git a/test/yarp/fixtures/seattlerb/heredoc_bad_hex_escape.txt b/test/yarp/fixtures/seattlerb/heredoc_bad_hex_escape.txt
new file mode 100644
index 0000000000..2c386cc6a9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_bad_hex_escape.txt
@@ -0,0 +1,3 @@
+s = <<eos
+a\xE9b
+eos
diff --git a/test/yarp/fixtures/seattlerb/heredoc_bad_oct_escape.txt b/test/yarp/fixtures/seattlerb/heredoc_bad_oct_escape.txt
new file mode 100644
index 0000000000..235a041e90
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_bad_oct_escape.txt
@@ -0,0 +1,5 @@
+s = <<-EOS
+a\247b
+cöd
+EOS
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_comma_arg.txt b/test/yarp/fixtures/seattlerb/heredoc_comma_arg.txt
new file mode 100644
index 0000000000..c230b12f65
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_comma_arg.txt
@@ -0,0 +1,7 @@
+["  some text
+",]
+
+[<<-FILE,
+  some text
+FILE
+]
diff --git a/test/yarp/fixtures/seattlerb/heredoc_lineno.txt b/test/yarp/fixtures/seattlerb/heredoc_lineno.txt
new file mode 100644
index 0000000000..73a2e3806b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_lineno.txt
@@ -0,0 +1,7 @@
+c = <<'CCC'
+line2
+line3
+line4
+CCC
+
+d = 42
diff --git a/test/yarp/fixtures/seattlerb/heredoc_nested.txt b/test/yarp/fixtures/seattlerb/heredoc_nested.txt
new file mode 100644
index 0000000000..508d6d3c05
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_nested.txt
@@ -0,0 +1,7 @@
+[<<A,
+#{<<B}
+b
+B
+a
+A
+0]
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly.txt
new file mode 100644
index 0000000000..e630ff62b4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly.txt
@@ -0,0 +1,7 @@
+a = <<~"EOF"
+  x
+  y
+  z
+  EOF
+
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_blank_line_plus_interpolation.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_blank_line_plus_interpolation.txt
new file mode 100644
index 0000000000..61b62157db
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_blank_line_plus_interpolation.txt
@@ -0,0 +1,4 @@
+a = foo(<<~EOF.chop)
+
+    #{bar}baz
+  EOF
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_blank_lines.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_blank_lines.txt
new file mode 100644
index 0000000000..0d89134c87
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_blank_lines.txt
@@ -0,0 +1,7 @@
+a = <<~EOF
+  x
+
+  z
+EOF
+
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_empty.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_empty.txt
new file mode 100644
index 0000000000..4602d757fb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_empty.txt
@@ -0,0 +1,2 @@
+<<~A
+A
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_interp.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_interp.txt
new file mode 100644
index 0000000000..47ff3c9070
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_interp.txt
@@ -0,0 +1,5 @@
+a = <<~EOF
+      w
+  x#{42} y
+    z
+  EOF
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_no_indent.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_no_indent.txt
new file mode 100644
index 0000000000..7076f6ef71
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_no_indent.txt
@@ -0,0 +1,3 @@
+<<~A
+a
+A
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_tabs.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_tabs.txt
new file mode 100644
index 0000000000..b193f0473b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_tabs.txt
@@ -0,0 +1,6 @@
+a = <<~"EOF"
+        blah blah
+	 blah blah
+  EOF
+
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_tabs_extra.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_tabs_extra.txt
new file mode 100644
index 0000000000..5b75dd2b59
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_tabs_extra.txt
@@ -0,0 +1,6 @@
+a = <<~"EOF"
+  blah blah
+ 	blah blah
+  EOF
+
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_squiggly_visually_blank_lines.txt b/test/yarp/fixtures/seattlerb/heredoc_squiggly_visually_blank_lines.txt
new file mode 100644
index 0000000000..0d89134c87
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_squiggly_visually_blank_lines.txt
@@ -0,0 +1,7 @@
+a = <<~EOF
+  x
+
+  z
+EOF
+
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_trailing_slash_continued_call.txt b/test/yarp/fixtures/seattlerb/heredoc_trailing_slash_continued_call.txt
new file mode 100644
index 0000000000..12c8fac126
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_trailing_slash_continued_call.txt
@@ -0,0 +1,4 @@
+<<END\
+blah
+END
+.strip
diff --git a/test/yarp/fixtures/seattlerb/heredoc_unicode.txt b/test/yarp/fixtures/seattlerb/heredoc_unicode.txt
new file mode 100644
index 0000000000..216a5cfe24
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_unicode.txt
@@ -0,0 +1,4 @@
+<<OOTPÜT
+.
+OOTPÜT
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_carriage_return_escapes.txt b/test/yarp/fixtures/seattlerb/heredoc_with_carriage_return_escapes.txt
new file mode 100644
index 0000000000..cb4967d154
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_carriage_return_escapes.txt
@@ -0,0 +1,5 @@
+<<EOS
+foo\rbar
+baz\r
+EOS
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_carriage_return_escapes_windows.txt b/test/yarp/fixtures/seattlerb/heredoc_with_carriage_return_escapes_windows.txt
new file mode 100644
index 0000000000..75ed936b5d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_carriage_return_escapes_windows.txt
@@ -0,0 +1,5 @@
+<<EOS

+foo\rbar

+baz\r

+EOS

+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_horrible_mix.txt b/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_horrible_mix.txt
new file mode 100644
index 0000000000..1c58c05cc5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_horrible_mix.txt
@@ -0,0 +1,4 @@
+<<'eot'

+body

+eot
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_returns.txt b/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_returns.txt
new file mode 100644
index 0000000000..706cb0d5c0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_returns.txt
@@ -0,0 +1,5 @@
+<<EOS
+foo
bar

+baz
+EOS
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_returns_windows.txt b/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_returns_windows.txt
new file mode 100644
index 0000000000..8ed84799b1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_extra_carriage_returns_windows.txt
@@ -0,0 +1,5 @@
+<<EOS

+foo
bar


+baz

+EOS

+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes.txt b/test/yarp/fixtures/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes.txt
new file mode 100644
index 0000000000..250e606f45
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes.txt
@@ -0,0 +1,4 @@
+<<EOS
+foo\r#@bar
+EOS
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes_windows.txt b/test/yarp/fixtures/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes_windows.txt
new file mode 100644
index 0000000000..12f97aff5e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes_windows.txt
@@ -0,0 +1,4 @@
+<<EOS

+foo\r#@bar

+EOS

+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_not_global_interpolation.txt b/test/yarp/fixtures/seattlerb/heredoc_with_not_global_interpolation.txt
new file mode 100644
index 0000000000..f94c2c9e27
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_not_global_interpolation.txt
@@ -0,0 +1,3 @@
+<<-HEREDOC
+#${
+HEREDOC
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_only_carriage_returns.txt b/test/yarp/fixtures/seattlerb/heredoc_with_only_carriage_returns.txt
new file mode 100644
index 0000000000..468ba85cf7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_only_carriage_returns.txt
@@ -0,0 +1,6 @@
+<<EOS
+

+


+\r
+EOS
+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_with_only_carriage_returns_windows.txt b/test/yarp/fixtures/seattlerb/heredoc_with_only_carriage_returns_windows.txt
new file mode 100644
index 0000000000..e973eff110
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_with_only_carriage_returns_windows.txt
@@ -0,0 +1,6 @@
+<<EOS

+


+



+\r

+EOS

+
diff --git a/test/yarp/fixtures/seattlerb/heredoc_wtf_I_hate_you.txt b/test/yarp/fixtures/seattlerb/heredoc_wtf_I_hate_you.txt
new file mode 100644
index 0000000000..5c73907cae
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/heredoc_wtf_I_hate_you.txt
@@ -0,0 +1,4 @@
+p <<-END+'b
+  a
+  END
+  c'+'d'
diff --git a/test/yarp/fixtures/seattlerb/i_fucking_hate_line_numbers.txt b/test/yarp/fixtures/seattlerb/i_fucking_hate_line_numbers.txt
new file mode 100644
index 0000000000..8008127dc9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/i_fucking_hate_line_numbers.txt
@@ -0,0 +1,13 @@
+if true
+  p 1
+  a.b 2
+  c.d 3, 4
+  e.f 5
+  g.h 6, 7
+  p(1)
+  a.b(2)
+  c.d(3, 4)
+  e.f(5)
+  g.h(6, 7)
+end
+
diff --git a/test/yarp/fixtures/seattlerb/i_fucking_hate_line_numbers2.txt b/test/yarp/fixtures/seattlerb/i_fucking_hate_line_numbers2.txt
new file mode 100644
index 0000000000..898a70fb75
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/i_fucking_hate_line_numbers2.txt
@@ -0,0 +1,8 @@
+if true then
+  p('a')
+  b = 1
+  p b
+  c =1
+end
+a
+
diff --git a/test/yarp/fixtures/seattlerb/i_have_no_freakin_clue.txt b/test/yarp/fixtures/seattlerb/i_have_no_freakin_clue.txt
new file mode 100644
index 0000000000..3259097492
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/i_have_no_freakin_clue.txt
@@ -0,0 +1,2 @@
+1 ? b('') : 2
+a d: 3
diff --git a/test/yarp/fixtures/seattlerb/if_elsif.txt b/test/yarp/fixtures/seattlerb/if_elsif.txt
new file mode 100644
index 0000000000..bc1c0a2b3d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/if_elsif.txt
@@ -0,0 +1 @@
+if 1; elsif 2; end
diff --git a/test/yarp/fixtures/seattlerb/if_symbol.txt b/test/yarp/fixtures/seattlerb/if_symbol.txt
new file mode 100644
index 0000000000..8d6e958ede
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/if_symbol.txt
@@ -0,0 +1 @@
+if f :x; end
diff --git a/test/yarp/fixtures/seattlerb/in_expr_no_case.txt b/test/yarp/fixtures/seattlerb/in_expr_no_case.txt
new file mode 100644
index 0000000000..40db7f868b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/in_expr_no_case.txt
@@ -0,0 +1 @@
+'woot' in String
diff --git a/test/yarp/fixtures/seattlerb/index_0.txt b/test/yarp/fixtures/seattlerb/index_0.txt
new file mode 100644
index 0000000000..050d4566ba
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/index_0.txt
@@ -0,0 +1 @@
+a[] = b
diff --git a/test/yarp/fixtures/seattlerb/index_0_opasgn.txt b/test/yarp/fixtures/seattlerb/index_0_opasgn.txt
new file mode 100644
index 0000000000..7189f0c3ea
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/index_0_opasgn.txt
@@ -0,0 +1 @@
+a[] += b
diff --git a/test/yarp/fixtures/seattlerb/integer_with_if_modifier.txt b/test/yarp/fixtures/seattlerb/integer_with_if_modifier.txt
new file mode 100644
index 0000000000..bf2f621e92
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/integer_with_if_modifier.txt
@@ -0,0 +1 @@
+1_234if true
diff --git a/test/yarp/fixtures/seattlerb/interpolated_symbol_array_line_breaks.txt b/test/yarp/fixtures/seattlerb/interpolated_symbol_array_line_breaks.txt
new file mode 100644
index 0000000000..f4c7cb9662
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/interpolated_symbol_array_line_breaks.txt
@@ -0,0 +1,5 @@
+%I(
+a
+b
+)
+1
diff --git a/test/yarp/fixtures/seattlerb/interpolated_word_array_line_breaks.txt b/test/yarp/fixtures/seattlerb/interpolated_word_array_line_breaks.txt
new file mode 100644
index 0000000000..d52b4789cf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/interpolated_word_array_line_breaks.txt
@@ -0,0 +1,5 @@
+%W(
+a
+b
+)
+1
diff --git a/test/yarp/fixtures/seattlerb/iter_args_1.txt b/test/yarp/fixtures/seattlerb/iter_args_1.txt
new file mode 100644
index 0000000000..c890ef62c3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_1.txt
@@ -0,0 +1 @@
+f { |a,b| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_10_1.txt b/test/yarp/fixtures/seattlerb/iter_args_10_1.txt
new file mode 100644
index 0000000000..3f558c5392
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_10_1.txt
@@ -0,0 +1 @@
+f { |a, b = 42, *c| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_10_2.txt b/test/yarp/fixtures/seattlerb/iter_args_10_2.txt
new file mode 100644
index 0000000000..4158e79d14
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_10_2.txt
@@ -0,0 +1 @@
+f { |a, b = 42, *c, &d| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_11_1.txt b/test/yarp/fixtures/seattlerb/iter_args_11_1.txt
new file mode 100644
index 0000000000..f86175c1a0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_11_1.txt
@@ -0,0 +1 @@
+f { |a, b = 42, *c, d| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_11_2.txt b/test/yarp/fixtures/seattlerb/iter_args_11_2.txt
new file mode 100644
index 0000000000..e4b017e44a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_11_2.txt
@@ -0,0 +1 @@
+f { |a, b = 42, *c, d, &e| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_2__19.txt b/test/yarp/fixtures/seattlerb/iter_args_2__19.txt
new file mode 100644
index 0000000000..84dd744243
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_2__19.txt
@@ -0,0 +1 @@
+f { |(a, b)| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_3.txt b/test/yarp/fixtures/seattlerb/iter_args_3.txt
new file mode 100644
index 0000000000..261968ff13
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_3.txt
@@ -0,0 +1 @@
+f { |a, (b, c), d| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_4.txt b/test/yarp/fixtures/seattlerb/iter_args_4.txt
new file mode 100644
index 0000000000..7db4d43ad3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_4.txt
@@ -0,0 +1 @@
+f { |a, *b, c| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_5.txt b/test/yarp/fixtures/seattlerb/iter_args_5.txt
new file mode 100644
index 0000000000..088fcdfcc5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_5.txt
@@ -0,0 +1 @@
+f { |a, &b| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_6.txt b/test/yarp/fixtures/seattlerb/iter_args_6.txt
new file mode 100644
index 0000000000..e980ec064b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_6.txt
@@ -0,0 +1 @@
+f { |a, b=42, c| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_7_1.txt b/test/yarp/fixtures/seattlerb/iter_args_7_1.txt
new file mode 100644
index 0000000000..e1dbf4b312
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_7_1.txt
@@ -0,0 +1 @@
+f { |a = 42, *b| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_7_2.txt b/test/yarp/fixtures/seattlerb/iter_args_7_2.txt
new file mode 100644
index 0000000000..e46e78e00e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_7_2.txt
@@ -0,0 +1 @@
+f { |a = 42, *b, &c| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_8_1.txt b/test/yarp/fixtures/seattlerb/iter_args_8_1.txt
new file mode 100644
index 0000000000..a0ec82ea5b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_8_1.txt
@@ -0,0 +1 @@
+f { |a = 42, *b, c| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_8_2.txt b/test/yarp/fixtures/seattlerb/iter_args_8_2.txt
new file mode 100644
index 0000000000..a1839fe706
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_8_2.txt
@@ -0,0 +1 @@
+f { |a = 42, *b, c, &d| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_9_1.txt b/test/yarp/fixtures/seattlerb/iter_args_9_1.txt
new file mode 100644
index 0000000000..13e5b20fe7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_9_1.txt
@@ -0,0 +1 @@
+f { |a = 42, b| }
diff --git a/test/yarp/fixtures/seattlerb/iter_args_9_2.txt b/test/yarp/fixtures/seattlerb/iter_args_9_2.txt
new file mode 100644
index 0000000000..83f6e1e029
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_args_9_2.txt
@@ -0,0 +1 @@
+f { |a = 42, b, &c| }
diff --git a/test/yarp/fixtures/seattlerb/iter_kwarg.txt b/test/yarp/fixtures/seattlerb/iter_kwarg.txt
new file mode 100644
index 0000000000..d4296cad76
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_kwarg.txt
@@ -0,0 +1 @@
+a { |b: 1| }
diff --git a/test/yarp/fixtures/seattlerb/iter_kwarg_kwsplat.txt b/test/yarp/fixtures/seattlerb/iter_kwarg_kwsplat.txt
new file mode 100644
index 0000000000..dd0ea13a6f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/iter_kwarg_kwsplat.txt
@@ -0,0 +1 @@
+a { |b: 1, **c| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me.txt b/test/yarp/fixtures/seattlerb/kill_me.txt
new file mode 100644
index 0000000000..9f95860b82
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me.txt
@@ -0,0 +1 @@
+f { |a, (b, *c)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me2.txt b/test/yarp/fixtures/seattlerb/kill_me2.txt
new file mode 100644
index 0000000000..8abfe3f634
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me2.txt
@@ -0,0 +1 @@
+f { |*a, b| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me3.txt b/test/yarp/fixtures/seattlerb/kill_me3.txt
new file mode 100644
index 0000000000..6f43ab7b1d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me3.txt
@@ -0,0 +1 @@
+f { |*a, b, &c| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me4.txt b/test/yarp/fixtures/seattlerb/kill_me4.txt
new file mode 100644
index 0000000000..7070e1e964
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me4.txt
@@ -0,0 +1 @@
+a=b ? true: false
diff --git a/test/yarp/fixtures/seattlerb/kill_me5.txt b/test/yarp/fixtures/seattlerb/kill_me5.txt
new file mode 100644
index 0000000000..6d52692481
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me5.txt
@@ -0,0 +1 @@
+f ->() { g do end }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_10.txt b/test/yarp/fixtures/seattlerb/kill_me_10.txt
new file mode 100644
index 0000000000..89974f5114
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_10.txt
@@ -0,0 +1 @@
+f { |a, (*b, c)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_11.txt b/test/yarp/fixtures/seattlerb/kill_me_11.txt
new file mode 100644
index 0000000000..911d037961
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_11.txt
@@ -0,0 +1 @@
+f { |a, (*)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_12.txt b/test/yarp/fixtures/seattlerb/kill_me_12.txt
new file mode 100644
index 0000000000..2405a80ec1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_12.txt
@@ -0,0 +1 @@
+f { |a, (*, b)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_6.txt b/test/yarp/fixtures/seattlerb/kill_me_6.txt
new file mode 100644
index 0000000000..3a45ae86fb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_6.txt
@@ -0,0 +1 @@
+f { |a, (b, *c, d)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_7.txt b/test/yarp/fixtures/seattlerb/kill_me_7.txt
new file mode 100644
index 0000000000..55272a1fc4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_7.txt
@@ -0,0 +1 @@
+f { |a, (b, *)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_8.txt b/test/yarp/fixtures/seattlerb/kill_me_8.txt
new file mode 100644
index 0000000000..76740db4ff
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_8.txt
@@ -0,0 +1 @@
+f { |a, (b, *, c)| }
diff --git a/test/yarp/fixtures/seattlerb/kill_me_9.txt b/test/yarp/fixtures/seattlerb/kill_me_9.txt
new file mode 100644
index 0000000000..b65f7fd052
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/kill_me_9.txt
@@ -0,0 +1 @@
+f { |a, (*b)| }
diff --git a/test/yarp/fixtures/seattlerb/label_vs_string.txt b/test/yarp/fixtures/seattlerb/label_vs_string.txt
new file mode 100644
index 0000000000..27ba8b64de
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/label_vs_string.txt
@@ -0,0 +1,2 @@
+_buf << ':
+'
diff --git a/test/yarp/fixtures/seattlerb/lambda_do_vs_brace.txt b/test/yarp/fixtures/seattlerb/lambda_do_vs_brace.txt
new file mode 100644
index 0000000000..bbf663a46a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lambda_do_vs_brace.txt
@@ -0,0 +1,7 @@
+f -> do end
+
+f -> {}
+
+f ->() do end
+
+f ->() {}
diff --git a/test/yarp/fixtures/seattlerb/lasgn_arg_rescue_arg.txt b/test/yarp/fixtures/seattlerb/lasgn_arg_rescue_arg.txt
new file mode 100644
index 0000000000..0dad496c28
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_arg_rescue_arg.txt
@@ -0,0 +1 @@
+a = 1 rescue 2
diff --git a/test/yarp/fixtures/seattlerb/lasgn_call_bracket_rescue_arg.txt b/test/yarp/fixtures/seattlerb/lasgn_call_bracket_rescue_arg.txt
new file mode 100644
index 0000000000..3f63c0b748
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_call_bracket_rescue_arg.txt
@@ -0,0 +1 @@
+a = b(1) rescue 2
diff --git a/test/yarp/fixtures/seattlerb/lasgn_call_nobracket_rescue_arg.txt b/test/yarp/fixtures/seattlerb/lasgn_call_nobracket_rescue_arg.txt
new file mode 100644
index 0000000000..0e86f1587d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_call_nobracket_rescue_arg.txt
@@ -0,0 +1 @@
+a = b 1 rescue 2
diff --git a/test/yarp/fixtures/seattlerb/lasgn_command.txt b/test/yarp/fixtures/seattlerb/lasgn_command.txt
new file mode 100644
index 0000000000..aca35b880c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_command.txt
@@ -0,0 +1 @@
+a = b.c 1
diff --git a/test/yarp/fixtures/seattlerb/lasgn_env.txt b/test/yarp/fixtures/seattlerb/lasgn_env.txt
new file mode 100644
index 0000000000..aec10273e5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_env.txt
@@ -0,0 +1 @@
+a = 42
diff --git a/test/yarp/fixtures/seattlerb/lasgn_ivar_env.txt b/test/yarp/fixtures/seattlerb/lasgn_ivar_env.txt
new file mode 100644
index 0000000000..2fa8471c01
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_ivar_env.txt
@@ -0,0 +1 @@
+@a = 42
diff --git a/test/yarp/fixtures/seattlerb/lasgn_lasgn_command_call.txt b/test/yarp/fixtures/seattlerb/lasgn_lasgn_command_call.txt
new file mode 100644
index 0000000000..5147131852
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_lasgn_command_call.txt
@@ -0,0 +1 @@
+a = b = c 1
diff --git a/test/yarp/fixtures/seattlerb/lasgn_middle_splat.txt b/test/yarp/fixtures/seattlerb/lasgn_middle_splat.txt
new file mode 100644
index 0000000000..bb378ca680
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/lasgn_middle_splat.txt
@@ -0,0 +1 @@
+a = b, *c, d
diff --git a/test/yarp/fixtures/seattlerb/magic_encoding_comment.txt b/test/yarp/fixtures/seattlerb/magic_encoding_comment.txt
new file mode 100644
index 0000000000..a02711ea05
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/magic_encoding_comment.txt
@@ -0,0 +1,4 @@
+# encoding: utf-8
+class ExampleUTF8ClassNameVarietà; def self.è; così = :però; end
+end
+
diff --git a/test/yarp/fixtures/seattlerb/masgn_anon_splat_arg.txt b/test/yarp/fixtures/seattlerb/masgn_anon_splat_arg.txt
new file mode 100644
index 0000000000..b796a742ed
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_anon_splat_arg.txt
@@ -0,0 +1 @@
+*, a = b
diff --git a/test/yarp/fixtures/seattlerb/masgn_arg_colon_arg.txt b/test/yarp/fixtures/seattlerb/masgn_arg_colon_arg.txt
new file mode 100644
index 0000000000..e0919793d4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_arg_colon_arg.txt
@@ -0,0 +1 @@
+a, b::c = d
diff --git a/test/yarp/fixtures/seattlerb/masgn_arg_ident.txt b/test/yarp/fixtures/seattlerb/masgn_arg_ident.txt
new file mode 100644
index 0000000000..45f248d854
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_arg_ident.txt
@@ -0,0 +1 @@
+a, b.C = d
diff --git a/test/yarp/fixtures/seattlerb/masgn_arg_splat_arg.txt b/test/yarp/fixtures/seattlerb/masgn_arg_splat_arg.txt
new file mode 100644
index 0000000000..05fe7c4d5f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_arg_splat_arg.txt
@@ -0,0 +1 @@
+a, *b, c = d
diff --git a/test/yarp/fixtures/seattlerb/masgn_colon2.txt b/test/yarp/fixtures/seattlerb/masgn_colon2.txt
new file mode 100644
index 0000000000..4e4f838d7d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_colon2.txt
@@ -0,0 +1 @@
+a, b::C = 1, 2
diff --git a/test/yarp/fixtures/seattlerb/masgn_colon3.txt b/test/yarp/fixtures/seattlerb/masgn_colon3.txt
new file mode 100644
index 0000000000..46098ba8c5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_colon3.txt
@@ -0,0 +1 @@
+::A, ::B = 1, 2
diff --git a/test/yarp/fixtures/seattlerb/masgn_command_call.txt b/test/yarp/fixtures/seattlerb/masgn_command_call.txt
new file mode 100644
index 0000000000..6da01e8a31
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_command_call.txt
@@ -0,0 +1 @@
+a, = b.c 1
diff --git a/test/yarp/fixtures/seattlerb/masgn_double_paren.txt b/test/yarp/fixtures/seattlerb/masgn_double_paren.txt
new file mode 100644
index 0000000000..ffac0a85a3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_double_paren.txt
@@ -0,0 +1 @@
+((a,b))=c
diff --git a/test/yarp/fixtures/seattlerb/masgn_lhs_splat.txt b/test/yarp/fixtures/seattlerb/masgn_lhs_splat.txt
new file mode 100644
index 0000000000..2419ef1671
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_lhs_splat.txt
@@ -0,0 +1 @@
+*a = 1, 2, 3
diff --git a/test/yarp/fixtures/seattlerb/masgn_paren.txt b/test/yarp/fixtures/seattlerb/masgn_paren.txt
new file mode 100644
index 0000000000..3889b9ff48
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_paren.txt
@@ -0,0 +1 @@
+(a, b) = c.d
diff --git a/test/yarp/fixtures/seattlerb/masgn_splat_arg.txt b/test/yarp/fixtures/seattlerb/masgn_splat_arg.txt
new file mode 100644
index 0000000000..a7c91425b0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_splat_arg.txt
@@ -0,0 +1 @@
+*a, b = c
diff --git a/test/yarp/fixtures/seattlerb/masgn_splat_arg_arg.txt b/test/yarp/fixtures/seattlerb/masgn_splat_arg_arg.txt
new file mode 100644
index 0000000000..46196bd703
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_splat_arg_arg.txt
@@ -0,0 +1 @@
+*a, b, c = d
diff --git a/test/yarp/fixtures/seattlerb/masgn_star.txt b/test/yarp/fixtures/seattlerb/masgn_star.txt
new file mode 100644
index 0000000000..c5eea37de2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_star.txt
@@ -0,0 +1 @@
+* = 1
diff --git a/test/yarp/fixtures/seattlerb/masgn_var_star_var.txt b/test/yarp/fixtures/seattlerb/masgn_var_star_var.txt
new file mode 100644
index 0000000000..04089c36ac
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/masgn_var_star_var.txt
@@ -0,0 +1 @@
+a, *, b = c
diff --git a/test/yarp/fixtures/seattlerb/messy_op_asgn_lineno.txt b/test/yarp/fixtures/seattlerb/messy_op_asgn_lineno.txt
new file mode 100644
index 0000000000..a7d1035ae3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/messy_op_asgn_lineno.txt
@@ -0,0 +1 @@
+a (B::C *= d e)
diff --git a/test/yarp/fixtures/seattlerb/method_call_assoc_trailing_comma.txt b/test/yarp/fixtures/seattlerb/method_call_assoc_trailing_comma.txt
new file mode 100644
index 0000000000..86f0fbdfc9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/method_call_assoc_trailing_comma.txt
@@ -0,0 +1 @@
+a.f(1=>2,)
diff --git a/test/yarp/fixtures/seattlerb/method_call_trailing_comma.txt b/test/yarp/fixtures/seattlerb/method_call_trailing_comma.txt
new file mode 100644
index 0000000000..1a155fba12
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/method_call_trailing_comma.txt
@@ -0,0 +1 @@
+a.f(1,)
diff --git a/test/yarp/fixtures/seattlerb/mlhs_back_anonsplat.txt b/test/yarp/fixtures/seattlerb/mlhs_back_anonsplat.txt
new file mode 100644
index 0000000000..7389b95563
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_back_anonsplat.txt
@@ -0,0 +1 @@
+a, b, c, * = f
diff --git a/test/yarp/fixtures/seattlerb/mlhs_back_splat.txt b/test/yarp/fixtures/seattlerb/mlhs_back_splat.txt
new file mode 100644
index 0000000000..ec5d23889a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_back_splat.txt
@@ -0,0 +1 @@
+a, b, c, *s = f
diff --git a/test/yarp/fixtures/seattlerb/mlhs_front_anonsplat.txt b/test/yarp/fixtures/seattlerb/mlhs_front_anonsplat.txt
new file mode 100644
index 0000000000..67e569438c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_front_anonsplat.txt
@@ -0,0 +1 @@
+*, x, y, z = f
diff --git a/test/yarp/fixtures/seattlerb/mlhs_front_splat.txt b/test/yarp/fixtures/seattlerb/mlhs_front_splat.txt
new file mode 100644
index 0000000000..dabadc382d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_front_splat.txt
@@ -0,0 +1 @@
+*s, x, y, z = f
diff --git a/test/yarp/fixtures/seattlerb/mlhs_keyword.txt b/test/yarp/fixtures/seattlerb/mlhs_keyword.txt
new file mode 100644
index 0000000000..899e7f8ed3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_keyword.txt
@@ -0,0 +1 @@
+a.!=(true, true)
diff --git a/test/yarp/fixtures/seattlerb/mlhs_mid_anonsplat.txt b/test/yarp/fixtures/seattlerb/mlhs_mid_anonsplat.txt
new file mode 100644
index 0000000000..a70a7e531b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_mid_anonsplat.txt
@@ -0,0 +1 @@
+a, b, c, *, x, y, z = f
diff --git a/test/yarp/fixtures/seattlerb/mlhs_mid_splat.txt b/test/yarp/fixtures/seattlerb/mlhs_mid_splat.txt
new file mode 100644
index 0000000000..2d23fd3966
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_mid_splat.txt
@@ -0,0 +1 @@
+a, b, c, *s, x, y, z = f
diff --git a/test/yarp/fixtures/seattlerb/mlhs_rescue.txt b/test/yarp/fixtures/seattlerb/mlhs_rescue.txt
new file mode 100644
index 0000000000..b4c79ae32e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/mlhs_rescue.txt
@@ -0,0 +1 @@
+a, b = f rescue 42
diff --git a/test/yarp/fixtures/seattlerb/module_comments.txt b/test/yarp/fixtures/seattlerb/module_comments.txt
new file mode 100644
index 0000000000..f8d5aae571
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/module_comments.txt
@@ -0,0 +1,10 @@
+# blah 1
+
+  # blah 2
+
+module X
+  # blah 3
+  def blah
+    # blah 4
+  end
+end
diff --git a/test/yarp/fixtures/seattlerb/motherfuckin_leading_dots.txt b/test/yarp/fixtures/seattlerb/motherfuckin_leading_dots.txt
new file mode 100644
index 0000000000..332dc8225c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/motherfuckin_leading_dots.txt
@@ -0,0 +1,2 @@
+a
+.b
diff --git a/test/yarp/fixtures/seattlerb/motherfuckin_leading_dots2.txt b/test/yarp/fixtures/seattlerb/motherfuckin_leading_dots2.txt
new file mode 100644
index 0000000000..fe73f641fe
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/motherfuckin_leading_dots2.txt
@@ -0,0 +1,2 @@
+1
+..3
diff --git a/test/yarp/fixtures/seattlerb/multiline_hash_declaration.txt b/test/yarp/fixtures/seattlerb/multiline_hash_declaration.txt
new file mode 100644
index 0000000000..21530307d2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/multiline_hash_declaration.txt
@@ -0,0 +1,8 @@
+f(state:
+ {
+})
+
+f(state: {
+})
+
+f(state: {})
diff --git a/test/yarp/fixtures/seattlerb/non_interpolated_symbol_array_line_breaks.txt b/test/yarp/fixtures/seattlerb/non_interpolated_symbol_array_line_breaks.txt
new file mode 100644
index 0000000000..1e14673f4e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/non_interpolated_symbol_array_line_breaks.txt
@@ -0,0 +1,5 @@
+%i(
+a
+b
+)
+1
diff --git a/test/yarp/fixtures/seattlerb/non_interpolated_word_array_line_breaks.txt b/test/yarp/fixtures/seattlerb/non_interpolated_word_array_line_breaks.txt
new file mode 100644
index 0000000000..79c1418770
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/non_interpolated_word_array_line_breaks.txt
@@ -0,0 +1,5 @@
+%w(
+a
+b
+)
+1
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_command_call.txt b/test/yarp/fixtures/seattlerb/op_asgn_command_call.txt
new file mode 100644
index 0000000000..92c989cb0d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_command_call.txt
@@ -0,0 +1 @@
+a ||= b.c 2
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_dot_ident_command_call.txt b/test/yarp/fixtures/seattlerb/op_asgn_dot_ident_command_call.txt
new file mode 100644
index 0000000000..89cfccda66
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_dot_ident_command_call.txt
@@ -0,0 +1 @@
+A.B ||= c 1
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_index_command_call.txt b/test/yarp/fixtures/seattlerb/op_asgn_index_command_call.txt
new file mode 100644
index 0000000000..2bfced81fe
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_index_command_call.txt
@@ -0,0 +1 @@
+a[:b] ||= c 1, 2
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_const_command_call.txt b/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_const_command_call.txt
new file mode 100644
index 0000000000..a567f60e83
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_const_command_call.txt
@@ -0,0 +1 @@
+A::B *= c d
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_identifier1.txt b/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_identifier1.txt
new file mode 100644
index 0000000000..0784b49167
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_identifier1.txt
@@ -0,0 +1 @@
+A::b += 1
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_identifier_command_call.txt b/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_identifier_command_call.txt
new file mode 100644
index 0000000000..c0f16eb3c1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_primary_colon_identifier_command_call.txt
@@ -0,0 +1 @@
+A::b *= c d
diff --git a/test/yarp/fixtures/seattlerb/op_asgn_val_dot_ident_command_call.txt b/test/yarp/fixtures/seattlerb/op_asgn_val_dot_ident_command_call.txt
new file mode 100644
index 0000000000..69057abf04
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/op_asgn_val_dot_ident_command_call.txt
@@ -0,0 +1 @@
+a.b ||= c 1
diff --git a/test/yarp/fixtures/seattlerb/parse_def_special_name.txt b/test/yarp/fixtures/seattlerb/parse_def_special_name.txt
new file mode 100644
index 0000000000..8d7d06c688
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_def_special_name.txt
@@ -0,0 +1 @@
+def next; end
diff --git a/test/yarp/fixtures/seattlerb/parse_if_not_canonical.txt b/test/yarp/fixtures/seattlerb/parse_if_not_canonical.txt
new file mode 100644
index 0000000000..1fd9bb7327
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_if_not_canonical.txt
@@ -0,0 +1,2 @@
+if not var.nil? then 'foo' else 'bar'
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_if_not_noncanonical.txt b/test/yarp/fixtures/seattlerb/parse_if_not_noncanonical.txt
new file mode 100644
index 0000000000..1fd9bb7327
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_if_not_noncanonical.txt
@@ -0,0 +1,2 @@
+if not var.nil? then 'foo' else 'bar'
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_block.txt b/test/yarp/fixtures/seattlerb/parse_line_block.txt
new file mode 100644
index 0000000000..21664649db
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_block.txt
@@ -0,0 +1,2 @@
+a = 42
+p a
diff --git a/test/yarp/fixtures/seattlerb/parse_line_block_inline_comment.txt b/test/yarp/fixtures/seattlerb/parse_line_block_inline_comment.txt
new file mode 100644
index 0000000000..f55ced714f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_block_inline_comment.txt
@@ -0,0 +1,3 @@
+a
+b # comment
+c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_block_inline_comment_leading_newlines.txt b/test/yarp/fixtures/seattlerb/parse_line_block_inline_comment_leading_newlines.txt
new file mode 100644
index 0000000000..6f1fee62a0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_block_inline_comment_leading_newlines.txt
@@ -0,0 +1,7 @@
+
+
+
+a
+b # comment
+# another comment
+c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_block_inline_multiline_comment.txt b/test/yarp/fixtures/seattlerb/parse_line_block_inline_multiline_comment.txt
new file mode 100644
index 0000000000..b00de34dc0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_block_inline_multiline_comment.txt
@@ -0,0 +1,4 @@
+a
+b # comment
+# another comment
+c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_call_ivar_arg_no_parens_line_break.txt b/test/yarp/fixtures/seattlerb/parse_line_call_ivar_arg_no_parens_line_break.txt
new file mode 100644
index 0000000000..73785eb794
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_call_ivar_arg_no_parens_line_break.txt
@@ -0,0 +1,2 @@
+a @b
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_call_ivar_line_break_paren.txt b/test/yarp/fixtures/seattlerb/parse_line_call_ivar_line_break_paren.txt
new file mode 100644
index 0000000000..6f136e6d6f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_call_ivar_line_break_paren.txt
@@ -0,0 +1,2 @@
+a(@b
+)
diff --git a/test/yarp/fixtures/seattlerb/parse_line_call_no_args.txt b/test/yarp/fixtures/seattlerb/parse_line_call_no_args.txt
new file mode 100644
index 0000000000..7900afd4b8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_call_no_args.txt
@@ -0,0 +1,3 @@
+f do |x, y|
+  x + y
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_defn_complex.txt b/test/yarp/fixtures/seattlerb/parse_line_defn_complex.txt
new file mode 100644
index 0000000000..244a8e862b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_defn_complex.txt
@@ -0,0 +1,5 @@
+def x(y)
+  p(y)
+  y *= 2
+  return y;
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_defn_no_parens.txt b/test/yarp/fixtures/seattlerb/parse_line_defn_no_parens.txt
new file mode 100644
index 0000000000..373ca7fbec
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_defn_no_parens.txt
@@ -0,0 +1,6 @@
+def f
+
+end
+
+def f
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_defn_no_parens_args.txt b/test/yarp/fixtures/seattlerb/parse_line_defn_no_parens_args.txt
new file mode 100644
index 0000000000..10f004a149
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_defn_no_parens_args.txt
@@ -0,0 +1,2 @@
+def f a
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_dot2.txt b/test/yarp/fixtures/seattlerb/parse_line_dot2.txt
new file mode 100644
index 0000000000..61c7554221
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_dot2.txt
@@ -0,0 +1,5 @@
+0..
+4
+a..
+b
+c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_dot2_open.txt b/test/yarp/fixtures/seattlerb/parse_line_dot2_open.txt
new file mode 100644
index 0000000000..b3e1e5aaf9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_dot2_open.txt
@@ -0,0 +1,3 @@
+0..
+; a..
+; c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_dot3.txt b/test/yarp/fixtures/seattlerb/parse_line_dot3.txt
new file mode 100644
index 0000000000..d1866b41de
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_dot3.txt
@@ -0,0 +1,5 @@
+0...
+4
+a...
+b
+c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_dot3_open.txt b/test/yarp/fixtures/seattlerb/parse_line_dot3_open.txt
new file mode 100644
index 0000000000..38e7634b21
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_dot3_open.txt
@@ -0,0 +1,3 @@
+0...
+; a...
+; c
diff --git a/test/yarp/fixtures/seattlerb/parse_line_dstr_escaped_newline.txt b/test/yarp/fixtures/seattlerb/parse_line_dstr_escaped_newline.txt
new file mode 100644
index 0000000000..29c1754915
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_dstr_escaped_newline.txt
@@ -0,0 +1,3 @@
+"a\n#{
+}"
+true
diff --git a/test/yarp/fixtures/seattlerb/parse_line_dstr_soft_newline.txt b/test/yarp/fixtures/seattlerb/parse_line_dstr_soft_newline.txt
new file mode 100644
index 0000000000..e4dbd7bcb2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_dstr_soft_newline.txt
@@ -0,0 +1,4 @@
+"a
+#{
+}"
+true
diff --git a/test/yarp/fixtures/seattlerb/parse_line_evstr_after_break.txt b/test/yarp/fixtures/seattlerb/parse_line_evstr_after_break.txt
new file mode 100644
index 0000000000..c1d91a51c4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_evstr_after_break.txt
@@ -0,0 +1,2 @@
+"a"\
+"#{b}"
diff --git a/test/yarp/fixtures/seattlerb/parse_line_hash_lit.txt b/test/yarp/fixtures/seattlerb/parse_line_hash_lit.txt
new file mode 100644
index 0000000000..25f8c90a06
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_hash_lit.txt
@@ -0,0 +1,3 @@
+{
+:s1 => 1,
+}
diff --git a/test/yarp/fixtures/seattlerb/parse_line_heredoc.txt b/test/yarp/fixtures/seattlerb/parse_line_heredoc.txt
new file mode 100644
index 0000000000..201339534c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_heredoc.txt
@@ -0,0 +1,5 @@
+      string = <<-HEREDOC.strip
+        very long string
+      HEREDOC
+      puts string
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_heredoc_evstr.txt b/test/yarp/fixtures/seattlerb/parse_line_heredoc_evstr.txt
new file mode 100644
index 0000000000..d50844db4b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_heredoc_evstr.txt
@@ -0,0 +1,4 @@
+<<-A
+a
+#{b}
+A
diff --git a/test/yarp/fixtures/seattlerb/parse_line_heredoc_hardnewline.txt b/test/yarp/fixtures/seattlerb/parse_line_heredoc_hardnewline.txt
new file mode 100644
index 0000000000..3fbf0f2c26
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_heredoc_hardnewline.txt
@@ -0,0 +1,7 @@
+<<-EOFOO
+\n\n\n\n\n\n\n\n\n
+EOFOO
+
+class Foo
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_heredoc_regexp_chars.txt b/test/yarp/fixtures/seattlerb/parse_line_heredoc_regexp_chars.txt
new file mode 100644
index 0000000000..5dab9cf4e7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_heredoc_regexp_chars.txt
@@ -0,0 +1,5 @@
+      string = <<-"^D"
+        very long string
+      ^D
+      puts string
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_iter_call_no_parens.txt b/test/yarp/fixtures/seattlerb/parse_line_iter_call_no_parens.txt
new file mode 100644
index 0000000000..bf1b33c8a2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_iter_call_no_parens.txt
@@ -0,0 +1,3 @@
+f a do |x, y|
+  x + y
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_iter_call_parens.txt b/test/yarp/fixtures/seattlerb/parse_line_iter_call_parens.txt
new file mode 100644
index 0000000000..25e9ea1c67
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_iter_call_parens.txt
@@ -0,0 +1,3 @@
+f(a) do |x, y|
+  x + y
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_line_multiline_str.txt b/test/yarp/fixtures/seattlerb/parse_line_multiline_str.txt
new file mode 100644
index 0000000000..cdefb3c9b7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_multiline_str.txt
@@ -0,0 +1,3 @@
+"a
+b"
+1
diff --git a/test/yarp/fixtures/seattlerb/parse_line_multiline_str_literal_n.txt b/test/yarp/fixtures/seattlerb/parse_line_multiline_str_literal_n.txt
new file mode 100644
index 0000000000..a179ba8c9c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_multiline_str_literal_n.txt
@@ -0,0 +1,2 @@
+"a\nb"
+1
diff --git a/test/yarp/fixtures/seattlerb/parse_line_newlines.txt b/test/yarp/fixtures/seattlerb/parse_line_newlines.txt
new file mode 100644
index 0000000000..28b0c286e8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_newlines.txt
@@ -0,0 +1,3 @@
+true
+
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_op_asgn.txt b/test/yarp/fixtures/seattlerb/parse_line_op_asgn.txt
new file mode 100644
index 0000000000..f2691c2ce4
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_op_asgn.txt
@@ -0,0 +1,4 @@
+      foo +=
+        bar
+      baz
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_postexe.txt b/test/yarp/fixtures/seattlerb/parse_line_postexe.txt
new file mode 100644
index 0000000000..fd8b318d19
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_postexe.txt
@@ -0,0 +1,3 @@
+END {
+foo
+}
diff --git a/test/yarp/fixtures/seattlerb/parse_line_preexe.txt b/test/yarp/fixtures/seattlerb/parse_line_preexe.txt
new file mode 100644
index 0000000000..b3eda77ebc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_preexe.txt
@@ -0,0 +1,3 @@
+BEGIN {
+foo
+}
diff --git a/test/yarp/fixtures/seattlerb/parse_line_rescue.txt b/test/yarp/fixtures/seattlerb/parse_line_rescue.txt
new file mode 100644
index 0000000000..a583160ce2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_rescue.txt
@@ -0,0 +1,8 @@
+begin
+  a
+rescue
+  b
+rescue
+  c
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_return.txt b/test/yarp/fixtures/seattlerb/parse_line_return.txt
new file mode 100644
index 0000000000..81021c2644
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_return.txt
@@ -0,0 +1,6 @@
+      def blah
+        if true then
+          return 42
+        end
+      end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_line_str_with_newline_escape.txt b/test/yarp/fixtures/seattlerb/parse_line_str_with_newline_escape.txt
new file mode 100644
index 0000000000..b2b6bb8234
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_str_with_newline_escape.txt
@@ -0,0 +1 @@
+a("\n", true)
diff --git a/test/yarp/fixtures/seattlerb/parse_line_to_ary.txt b/test/yarp/fixtures/seattlerb/parse_line_to_ary.txt
new file mode 100644
index 0000000000..590d0abd14
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_to_ary.txt
@@ -0,0 +1,3 @@
+a,
+b = c
+d
diff --git a/test/yarp/fixtures/seattlerb/parse_line_trailing_newlines.txt b/test/yarp/fixtures/seattlerb/parse_line_trailing_newlines.txt
new file mode 100644
index 0000000000..422c2b7ab3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_line_trailing_newlines.txt
@@ -0,0 +1,2 @@
+a
+b
diff --git a/test/yarp/fixtures/seattlerb/parse_opt_call_args_assocs_comma.txt b/test/yarp/fixtures/seattlerb/parse_opt_call_args_assocs_comma.txt
new file mode 100644
index 0000000000..649c109ea1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_opt_call_args_assocs_comma.txt
@@ -0,0 +1 @@
+1[2=>3,]
diff --git a/test/yarp/fixtures/seattlerb/parse_opt_call_args_lit_comma.txt b/test/yarp/fixtures/seattlerb/parse_opt_call_args_lit_comma.txt
new file mode 100644
index 0000000000..741cd4ffd1
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_opt_call_args_lit_comma.txt
@@ -0,0 +1 @@
+1[2,]
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_019.txt b/test/yarp/fixtures/seattlerb/parse_pattern_019.txt
new file mode 100644
index 0000000000..1e8a75902d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_019.txt
@@ -0,0 +1,5 @@
+case 0
+in -1..1
+  true
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_044.txt b/test/yarp/fixtures/seattlerb/parse_pattern_044.txt
new file mode 100644
index 0000000000..a6a0ac6c1c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_044.txt
@@ -0,0 +1,5 @@
+case obj
+in Object[]
+  true
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_051.txt b/test/yarp/fixtures/seattlerb/parse_pattern_051.txt
new file mode 100644
index 0000000000..b7cf769f50
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_051.txt
@@ -0,0 +1,5 @@
+case [0, 1, 2]
+in [0, 1,]
+  true
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_058.txt b/test/yarp/fixtures/seattlerb/parse_pattern_058.txt
new file mode 100644
index 0000000000..bd7537098e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_058.txt
@@ -0,0 +1,5 @@
+case {a: 0}
+in {a:, **rest}
+  [a, rest]
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_058_2.txt b/test/yarp/fixtures/seattlerb/parse_pattern_058_2.txt
new file mode 100644
index 0000000000..eb1b3cd8ab
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_058_2.txt
@@ -0,0 +1,5 @@
+case {a: 0}
+in {a:, **}
+  [a]
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_069.txt b/test/yarp/fixtures/seattlerb/parse_pattern_069.txt
new file mode 100644
index 0000000000..f43dff8959
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_069.txt
@@ -0,0 +1,5 @@
+case :a
+in Object[b: 1]
+  1
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_pattern_076.txt b/test/yarp/fixtures/seattlerb/parse_pattern_076.txt
new file mode 100644
index 0000000000..bb947605b3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_pattern_076.txt
@@ -0,0 +1,5 @@
+case {a: 1}
+in {a: 1, **nil}
+  true
+end
+
diff --git a/test/yarp/fixtures/seattlerb/parse_until_not_canonical.txt b/test/yarp/fixtures/seattlerb/parse_until_not_canonical.txt
new file mode 100644
index 0000000000..4de38968dc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_until_not_canonical.txt
@@ -0,0 +1,3 @@
+until not var.nil?
+  'foo'
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_until_not_noncanonical.txt b/test/yarp/fixtures/seattlerb/parse_until_not_noncanonical.txt
new file mode 100644
index 0000000000..4de38968dc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_until_not_noncanonical.txt
@@ -0,0 +1,3 @@
+until not var.nil?
+  'foo'
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_while_not_canonical.txt b/test/yarp/fixtures/seattlerb/parse_while_not_canonical.txt
new file mode 100644
index 0000000000..5aa464167f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_while_not_canonical.txt
@@ -0,0 +1,3 @@
+while not var.nil?
+  'foo'
+end
diff --git a/test/yarp/fixtures/seattlerb/parse_while_not_noncanonical.txt b/test/yarp/fixtures/seattlerb/parse_while_not_noncanonical.txt
new file mode 100644
index 0000000000..5aa464167f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/parse_while_not_noncanonical.txt
@@ -0,0 +1,3 @@
+while not var.nil?
+  'foo'
+end
diff --git a/test/yarp/fixtures/seattlerb/pctW_lineno.txt b/test/yarp/fixtures/seattlerb/pctW_lineno.txt
new file mode 100644
index 0000000000..b222ff0174
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/pctW_lineno.txt
@@ -0,0 +1,5 @@
+%W(a\nb
+c d
+e\
+f
+gy h\y i\y)
diff --git a/test/yarp/fixtures/seattlerb/pct_Q_backslash_nl.txt b/test/yarp/fixtures/seattlerb/pct_Q_backslash_nl.txt
new file mode 100644
index 0000000000..d88e1fd21c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/pct_Q_backslash_nl.txt
@@ -0,0 +1,2 @@
+%Q{ \
+}
diff --git a/test/yarp/fixtures/seattlerb/pct_nl.txt b/test/yarp/fixtures/seattlerb/pct_nl.txt
new file mode 100644
index 0000000000..2cee1cdd44
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/pct_nl.txt
@@ -0,0 +1,3 @@
+x = %
+
+
diff --git a/test/yarp/fixtures/seattlerb/pct_w_heredoc_interp_nested.txt b/test/yarp/fixtures/seattlerb/pct_w_heredoc_interp_nested.txt
new file mode 100644
index 0000000000..4e084661bf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/pct_w_heredoc_interp_nested.txt
@@ -0,0 +1,4 @@
+%W( 1 #{<<A} 3
+2
+A
+      4 5 )
diff --git a/test/yarp/fixtures/seattlerb/pipe_semicolon.txt b/test/yarp/fixtures/seattlerb/pipe_semicolon.txt
new file mode 100644
index 0000000000..e692cc434f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/pipe_semicolon.txt
@@ -0,0 +1 @@
+a.b do | ; c | end
diff --git a/test/yarp/fixtures/seattlerb/pipe_space.txt b/test/yarp/fixtures/seattlerb/pipe_space.txt
new file mode 100644
index 0000000000..7f0df799b9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/pipe_space.txt
@@ -0,0 +1 @@
+a.b do | | end
diff --git a/test/yarp/fixtures/seattlerb/qWords_space.txt b/test/yarp/fixtures/seattlerb/qWords_space.txt
new file mode 100644
index 0000000000..a8299ba3f8
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qWords_space.txt
@@ -0,0 +1 @@
+%W( )
diff --git a/test/yarp/fixtures/seattlerb/qsymbols.txt b/test/yarp/fixtures/seattlerb/qsymbols.txt
new file mode 100644
index 0000000000..cb9ff09ae0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qsymbols.txt
@@ -0,0 +1 @@
+%I(a b c)
diff --git a/test/yarp/fixtures/seattlerb/qsymbols_empty.txt b/test/yarp/fixtures/seattlerb/qsymbols_empty.txt
new file mode 100644
index 0000000000..10a3279907
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qsymbols_empty.txt
@@ -0,0 +1 @@
+%I()
diff --git a/test/yarp/fixtures/seattlerb/qsymbols_empty_space.txt b/test/yarp/fixtures/seattlerb/qsymbols_empty_space.txt
new file mode 100644
index 0000000000..819f16ad06
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qsymbols_empty_space.txt
@@ -0,0 +1 @@
+%I( )
diff --git a/test/yarp/fixtures/seattlerb/qsymbols_interp.txt b/test/yarp/fixtures/seattlerb/qsymbols_interp.txt
new file mode 100644
index 0000000000..2f34883867
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qsymbols_interp.txt
@@ -0,0 +1 @@
+%I(a b#{1+1} c)
diff --git a/test/yarp/fixtures/seattlerb/quoted_symbol_hash_arg.txt b/test/yarp/fixtures/seattlerb/quoted_symbol_hash_arg.txt
new file mode 100644
index 0000000000..4f1295ef18
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/quoted_symbol_hash_arg.txt
@@ -0,0 +1 @@
+puts 'a': {}
diff --git a/test/yarp/fixtures/seattlerb/quoted_symbol_keys.txt b/test/yarp/fixtures/seattlerb/quoted_symbol_keys.txt
new file mode 100644
index 0000000000..c6a946723d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/quoted_symbol_keys.txt
@@ -0,0 +1 @@
+{ 'a': :b }
diff --git a/test/yarp/fixtures/seattlerb/qw_escape.txt b/test/yarp/fixtures/seattlerb/qw_escape.txt
new file mode 100644
index 0000000000..a94a0e5dcb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qw_escape.txt
@@ -0,0 +1 @@
+%q(
\')
diff --git a/test/yarp/fixtures/seattlerb/qw_escape_term.txt b/test/yarp/fixtures/seattlerb/qw_escape_term.txt
new file mode 100644
index 0000000000..9734fc3421
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qw_escape_term.txt
@@ -0,0 +1 @@
+%q|blah blah \| blah blah|
diff --git a/test/yarp/fixtures/seattlerb/qwords_empty.txt b/test/yarp/fixtures/seattlerb/qwords_empty.txt
new file mode 100644
index 0000000000..69cc6679d6
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/qwords_empty.txt
@@ -0,0 +1 @@
+%w()
diff --git a/test/yarp/fixtures/seattlerb/read_escape_unicode_curlies.txt b/test/yarp/fixtures/seattlerb/read_escape_unicode_curlies.txt
new file mode 100644
index 0000000000..427b94cc4d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/read_escape_unicode_curlies.txt
@@ -0,0 +1 @@
+?\u{00a0}
diff --git a/test/yarp/fixtures/seattlerb/read_escape_unicode_h4.txt b/test/yarp/fixtures/seattlerb/read_escape_unicode_h4.txt
new file mode 100644
index 0000000000..71aa7a4347
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/read_escape_unicode_h4.txt
@@ -0,0 +1 @@
+?\u00a0
diff --git a/test/yarp/fixtures/seattlerb/regexp.txt b/test/yarp/fixtures/seattlerb/regexp.txt
new file mode 100644
index 0000000000..bc06458c5c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/regexp.txt
@@ -0,0 +1,9 @@
+/wtf/
+
+/wtf/m
+
+/wtf/n
+
+/wtf/nm
+
+/wtf/nmnmnmnm
diff --git a/test/yarp/fixtures/seattlerb/regexp_esc_C_slash.txt b/test/yarp/fixtures/seattlerb/regexp_esc_C_slash.txt
new file mode 100644
index 0000000000..1fd9207c66
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/regexp_esc_C_slash.txt
@@ -0,0 +1 @@
+/\cC\d/
diff --git a/test/yarp/fixtures/seattlerb/regexp_esc_u.txt b/test/yarp/fixtures/seattlerb/regexp_esc_u.txt
new file mode 100644
index 0000000000..b91704fb0a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/regexp_esc_u.txt
@@ -0,0 +1 @@
+/[\u0021-\u0027]/
diff --git a/test/yarp/fixtures/seattlerb/regexp_escape_extended.txt b/test/yarp/fixtures/seattlerb/regexp_escape_extended.txt
new file mode 100644
index 0000000000..73dcbab69c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/regexp_escape_extended.txt
@@ -0,0 +1 @@
+/\“/
diff --git a/test/yarp/fixtures/seattlerb/regexp_unicode_curlies.txt b/test/yarp/fixtures/seattlerb/regexp_unicode_curlies.txt
new file mode 100644
index 0000000000..5a02bd92ca
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/regexp_unicode_curlies.txt
@@ -0,0 +1,3 @@
+/\u{c0de babe}/
+
+/\u{df}/
diff --git a/test/yarp/fixtures/seattlerb/required_kwarg_no_value.txt b/test/yarp/fixtures/seattlerb/required_kwarg_no_value.txt
new file mode 100644
index 0000000000..453bcbb33b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/required_kwarg_no_value.txt
@@ -0,0 +1,2 @@
+def x a:, b:
+end
diff --git a/test/yarp/fixtures/seattlerb/rescue_do_end_ensure_result.txt b/test/yarp/fixtures/seattlerb/rescue_do_end_ensure_result.txt
new file mode 100644
index 0000000000..7049be66c5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rescue_do_end_ensure_result.txt
@@ -0,0 +1,5 @@
+proc do
+  :begin
+ensure
+  :ensure
+end.call
diff --git a/test/yarp/fixtures/seattlerb/rescue_do_end_no_raise.txt b/test/yarp/fixtures/seattlerb/rescue_do_end_no_raise.txt
new file mode 100644
index 0000000000..5f16ec2f15
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rescue_do_end_no_raise.txt
@@ -0,0 +1,9 @@
+tap do
+  :begin
+rescue
+  :rescue
+else
+  :else
+ensure
+  :ensure
+end
diff --git a/test/yarp/fixtures/seattlerb/rescue_do_end_raised.txt b/test/yarp/fixtures/seattlerb/rescue_do_end_raised.txt
new file mode 100644
index 0000000000..d04215eb48
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rescue_do_end_raised.txt
@@ -0,0 +1,5 @@
+tap do
+  raise
+ensure
+  :ensure
+end
diff --git a/test/yarp/fixtures/seattlerb/rescue_do_end_rescued.txt b/test/yarp/fixtures/seattlerb/rescue_do_end_rescued.txt
new file mode 100644
index 0000000000..4b377511f0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rescue_do_end_rescued.txt
@@ -0,0 +1,9 @@
+tap do
+  raise
+rescue
+  :rescue
+else
+  :else
+ensure
+  :ensure
+end
diff --git a/test/yarp/fixtures/seattlerb/rescue_in_block.txt b/test/yarp/fixtures/seattlerb/rescue_in_block.txt
new file mode 100644
index 0000000000..c6e834aa1e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rescue_in_block.txt
@@ -0,0 +1,4 @@
+blah do
+rescue
+  stuff
+end
diff --git a/test/yarp/fixtures/seattlerb/rescue_parens.txt b/test/yarp/fixtures/seattlerb/rescue_parens.txt
new file mode 100644
index 0000000000..f0eb4db417
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rescue_parens.txt
@@ -0,0 +1 @@
+a (b rescue c)
diff --git a/test/yarp/fixtures/seattlerb/return_call_assocs.txt b/test/yarp/fixtures/seattlerb/return_call_assocs.txt
new file mode 100644
index 0000000000..34ea778f17
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/return_call_assocs.txt
@@ -0,0 +1,11 @@
+return 1, :z => 1
+
+return 1, :z => 1, :w => 2
+
+return y :z=>1
+
+return y z:1
+
+return y(z:1)
+
+return y(z=>1)
diff --git a/test/yarp/fixtures/seattlerb/rhs_asgn.txt b/test/yarp/fixtures/seattlerb/rhs_asgn.txt
new file mode 100644
index 0000000000..ca581031e2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/rhs_asgn.txt
@@ -0,0 +1 @@
+42 => n
diff --git a/test/yarp/fixtures/seattlerb/ruby21_numbers.txt b/test/yarp/fixtures/seattlerb/ruby21_numbers.txt
new file mode 100644
index 0000000000..34ceb63a0c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/ruby21_numbers.txt
@@ -0,0 +1 @@
+[1i, 2r, 3ri]
diff --git a/test/yarp/fixtures/seattlerb/safe_attrasgn.txt b/test/yarp/fixtures/seattlerb/safe_attrasgn.txt
new file mode 100644
index 0000000000..1279e02cfc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_attrasgn.txt
@@ -0,0 +1 @@
+a&.b = 1
diff --git a/test/yarp/fixtures/seattlerb/safe_attrasgn_constant.txt b/test/yarp/fixtures/seattlerb/safe_attrasgn_constant.txt
new file mode 100644
index 0000000000..3a17ac6bcf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_attrasgn_constant.txt
@@ -0,0 +1 @@
+a&.B = 1
diff --git a/test/yarp/fixtures/seattlerb/safe_call.txt b/test/yarp/fixtures/seattlerb/safe_call.txt
new file mode 100644
index 0000000000..8ecd27e0fe
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_call.txt
@@ -0,0 +1 @@
+a&.b
diff --git a/test/yarp/fixtures/seattlerb/safe_call_after_newline.txt b/test/yarp/fixtures/seattlerb/safe_call_after_newline.txt
new file mode 100644
index 0000000000..58e3fba554
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_call_after_newline.txt
@@ -0,0 +1,2 @@
+a
+&.b
diff --git a/test/yarp/fixtures/seattlerb/safe_call_dot_parens.txt b/test/yarp/fixtures/seattlerb/safe_call_dot_parens.txt
new file mode 100644
index 0000000000..5def076640
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_call_dot_parens.txt
@@ -0,0 +1 @@
+a&.()
diff --git a/test/yarp/fixtures/seattlerb/safe_call_newline.txt b/test/yarp/fixtures/seattlerb/safe_call_newline.txt
new file mode 100644
index 0000000000..8778b46585
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_call_newline.txt
@@ -0,0 +1,2 @@
+a&.b
+
diff --git a/test/yarp/fixtures/seattlerb/safe_call_operator.txt b/test/yarp/fixtures/seattlerb/safe_call_operator.txt
new file mode 100644
index 0000000000..f3fe2b0392
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_call_operator.txt
@@ -0,0 +1 @@
+a&.> 1
diff --git a/test/yarp/fixtures/seattlerb/safe_call_rhs_newline.txt b/test/yarp/fixtures/seattlerb/safe_call_rhs_newline.txt
new file mode 100644
index 0000000000..d3b07b77b2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_call_rhs_newline.txt
@@ -0,0 +1,2 @@
+c = a&.b
+
diff --git a/test/yarp/fixtures/seattlerb/safe_calls.txt b/test/yarp/fixtures/seattlerb/safe_calls.txt
new file mode 100644
index 0000000000..eafeace500
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_calls.txt
@@ -0,0 +1 @@
+a&.b&.c(1)
diff --git a/test/yarp/fixtures/seattlerb/safe_op_asgn.txt b/test/yarp/fixtures/seattlerb/safe_op_asgn.txt
new file mode 100644
index 0000000000..8915a1cccf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_op_asgn.txt
@@ -0,0 +1 @@
+a&.b += x 1
diff --git a/test/yarp/fixtures/seattlerb/safe_op_asgn2.txt b/test/yarp/fixtures/seattlerb/safe_op_asgn2.txt
new file mode 100644
index 0000000000..0960b2548b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/safe_op_asgn2.txt
@@ -0,0 +1,2 @@
+a&.b ||=
+x;
diff --git a/test/yarp/fixtures/seattlerb/slashy_newlines_within_string.txt b/test/yarp/fixtures/seattlerb/slashy_newlines_within_string.txt
new file mode 100644
index 0000000000..cdf7a70cb7
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/slashy_newlines_within_string.txt
@@ -0,0 +1,7 @@
+puts "hello\
+ my\
+ dear\
+ friend"
+
+a + b
+
diff --git a/test/yarp/fixtures/seattlerb/stabby_arg_no_paren.txt b/test/yarp/fixtures/seattlerb/stabby_arg_no_paren.txt
new file mode 100644
index 0000000000..f16bed4ccf
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_arg_no_paren.txt
@@ -0,0 +1 @@
+->a{}
diff --git a/test/yarp/fixtures/seattlerb/stabby_arg_opt_splat_arg_block_omfg.txt b/test/yarp/fixtures/seattlerb/stabby_arg_opt_splat_arg_block_omfg.txt
new file mode 100644
index 0000000000..87a7c5dad3
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_arg_opt_splat_arg_block_omfg.txt
@@ -0,0 +1 @@
+->(b, c=1, *d, e, &f){}
diff --git a/test/yarp/fixtures/seattlerb/stabby_block_iter_call.txt b/test/yarp/fixtures/seattlerb/stabby_block_iter_call.txt
new file mode 100644
index 0000000000..5e9e3f5527
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_block_iter_call.txt
@@ -0,0 +1,4 @@
+x -> () do
+a.b do
+end
+end
diff --git a/test/yarp/fixtures/seattlerb/stabby_block_iter_call_no_target_with_arg.txt b/test/yarp/fixtures/seattlerb/stabby_block_iter_call_no_target_with_arg.txt
new file mode 100644
index 0000000000..7235394751
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_block_iter_call_no_target_with_arg.txt
@@ -0,0 +1,4 @@
+x -> () do
+a(1) do
+end
+end
diff --git a/test/yarp/fixtures/seattlerb/stabby_block_kw.txt b/test/yarp/fixtures/seattlerb/stabby_block_kw.txt
new file mode 100644
index 0000000000..74d9e0a328
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_block_kw.txt
@@ -0,0 +1 @@
+-> (k:42) { }
diff --git a/test/yarp/fixtures/seattlerb/stabby_block_kw__required.txt b/test/yarp/fixtures/seattlerb/stabby_block_kw__required.txt
new file mode 100644
index 0000000000..bd16ffa73c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_block_kw__required.txt
@@ -0,0 +1 @@
+-> (k:) { }
diff --git a/test/yarp/fixtures/seattlerb/stabby_proc_scope.txt b/test/yarp/fixtures/seattlerb/stabby_proc_scope.txt
new file mode 100644
index 0000000000..1f7f9ff52b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/stabby_proc_scope.txt
@@ -0,0 +1 @@
+->(a; b) {}
diff --git a/test/yarp/fixtures/seattlerb/str_backslashes.txt b/test/yarp/fixtures/seattlerb/str_backslashes.txt
new file mode 100644
index 0000000000..5fd6da361b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_backslashes.txt
@@ -0,0 +1 @@
+x '\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n'
diff --git a/test/yarp/fixtures/seattlerb/str_double_double_escaped_newline.txt b/test/yarp/fixtures/seattlerb/str_double_double_escaped_newline.txt
new file mode 100644
index 0000000000..2b022a55f6
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_double_double_escaped_newline.txt
@@ -0,0 +1 @@
+a "\\n";b
diff --git a/test/yarp/fixtures/seattlerb/str_double_escaped_newline.txt b/test/yarp/fixtures/seattlerb/str_double_escaped_newline.txt
new file mode 100644
index 0000000000..e439225344
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_double_escaped_newline.txt
@@ -0,0 +1 @@
+a "\n";b
diff --git a/test/yarp/fixtures/seattlerb/str_double_newline.txt b/test/yarp/fixtures/seattlerb/str_double_newline.txt
new file mode 100644
index 0000000000..2d439506ca
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_double_newline.txt
@@ -0,0 +1,2 @@
+a "
+";b
diff --git a/test/yarp/fixtures/seattlerb/str_evstr.txt b/test/yarp/fixtures/seattlerb/str_evstr.txt
new file mode 100644
index 0000000000..86c6d1526d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_evstr.txt
@@ -0,0 +1 @@
+"a #{b}"
diff --git a/test/yarp/fixtures/seattlerb/str_evstr_escape.txt b/test/yarp/fixtures/seattlerb/str_evstr_escape.txt
new file mode 100644
index 0000000000..517dfd4778
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_evstr_escape.txt
@@ -0,0 +1 @@
+"a #{b}\302\275"
diff --git a/test/yarp/fixtures/seattlerb/str_heredoc_interp.txt b/test/yarp/fixtures/seattlerb/str_heredoc_interp.txt
new file mode 100644
index 0000000000..aa2613008c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_heredoc_interp.txt
@@ -0,0 +1,5 @@
+<<""
+#{x}
+blah2
+
+
diff --git a/test/yarp/fixtures/seattlerb/str_interp_ternary_or_label.txt b/test/yarp/fixtures/seattlerb/str_interp_ternary_or_label.txt
new file mode 100644
index 0000000000..fe6637678f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_interp_ternary_or_label.txt
@@ -0,0 +1 @@
+"#{a.b? ? ""+a+"": ""}"
diff --git a/test/yarp/fixtures/seattlerb/str_lit_concat_bad_encodings.txt b/test/yarp/fixtures/seattlerb/str_lit_concat_bad_encodings.txt
new file mode 100644
index 0000000000..f4eb3971bb
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_lit_concat_bad_encodings.txt
@@ -0,0 +1,2 @@
+"\xE3\xD3\x8B\xE3\x83\xBC\x83\xE3\x83\xE3\x82\xB3\xA3\x82\x99" \
+        "\xE3\x83\xB3\xE3\x83\x8F\xE3\x82\x9A\xC3\xBD;foo@bar.com"
diff --git a/test/yarp/fixtures/seattlerb/str_newline_hash_line_number.txt b/test/yarp/fixtures/seattlerb/str_newline_hash_line_number.txt
new file mode 100644
index 0000000000..9c8f702000
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_newline_hash_line_number.txt
@@ -0,0 +1,2 @@
+"\n\n\n\n#"
+1
diff --git a/test/yarp/fixtures/seattlerb/str_pct_Q_nested.txt b/test/yarp/fixtures/seattlerb/str_pct_Q_nested.txt
new file mode 100644
index 0000000000..1f3d0613e5
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_pct_Q_nested.txt
@@ -0,0 +1 @@
+%Q[before [#{nest}] after]
diff --git a/test/yarp/fixtures/seattlerb/str_pct_nested_nested.txt b/test/yarp/fixtures/seattlerb/str_pct_nested_nested.txt
new file mode 100644
index 0000000000..cb12415215
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_pct_nested_nested.txt
@@ -0,0 +1 @@
+%{ { #{ "#{1}" } } }
diff --git a/test/yarp/fixtures/seattlerb/str_pct_q.txt b/test/yarp/fixtures/seattlerb/str_pct_q.txt
new file mode 100644
index 0000000000..65d71197c9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_pct_q.txt
@@ -0,0 +1 @@
+%q{a b c}
diff --git a/test/yarp/fixtures/seattlerb/str_single_double_escaped_newline.txt b/test/yarp/fixtures/seattlerb/str_single_double_escaped_newline.txt
new file mode 100644
index 0000000000..2ff0aec111
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_single_double_escaped_newline.txt
@@ -0,0 +1 @@
+a '\\n';b
diff --git a/test/yarp/fixtures/seattlerb/str_single_escaped_newline.txt b/test/yarp/fixtures/seattlerb/str_single_escaped_newline.txt
new file mode 100644
index 0000000000..5abb8d6334
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_single_escaped_newline.txt
@@ -0,0 +1 @@
+a '\n';b
diff --git a/test/yarp/fixtures/seattlerb/str_single_newline.txt b/test/yarp/fixtures/seattlerb/str_single_newline.txt
new file mode 100644
index 0000000000..1033cc7e96
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_single_newline.txt
@@ -0,0 +1,2 @@
+a '
+';b
diff --git a/test/yarp/fixtures/seattlerb/str_str.txt b/test/yarp/fixtures/seattlerb/str_str.txt
new file mode 100644
index 0000000000..388d777dc2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_str.txt
@@ -0,0 +1 @@
+"a #{'b'}"
diff --git a/test/yarp/fixtures/seattlerb/str_str_str.txt b/test/yarp/fixtures/seattlerb/str_str_str.txt
new file mode 100644
index 0000000000..d64e01dc5d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/str_str_str.txt
@@ -0,0 +1 @@
+"a #{'b'} c"
diff --git a/test/yarp/fixtures/seattlerb/super_arg.txt b/test/yarp/fixtures/seattlerb/super_arg.txt
new file mode 100644
index 0000000000..1b19ecd51c
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/super_arg.txt
@@ -0,0 +1 @@
+super 42
diff --git a/test/yarp/fixtures/seattlerb/symbol_empty.txt b/test/yarp/fixtures/seattlerb/symbol_empty.txt
new file mode 100644
index 0000000000..cbb260bb4e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/symbol_empty.txt
@@ -0,0 +1 @@
+:''
diff --git a/test/yarp/fixtures/seattlerb/symbol_list.txt b/test/yarp/fixtures/seattlerb/symbol_list.txt
new file mode 100644
index 0000000000..d357195184
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/symbol_list.txt
@@ -0,0 +1 @@
+%I[#{a} #{b}]
diff --git a/test/yarp/fixtures/seattlerb/symbols.txt b/test/yarp/fixtures/seattlerb/symbols.txt
new file mode 100644
index 0000000000..3ec930ce66
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/symbols.txt
@@ -0,0 +1 @@
+%i(a b c)
diff --git a/test/yarp/fixtures/seattlerb/symbols_empty.txt b/test/yarp/fixtures/seattlerb/symbols_empty.txt
new file mode 100644
index 0000000000..840948efb2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/symbols_empty.txt
@@ -0,0 +1 @@
+%i()
diff --git a/test/yarp/fixtures/seattlerb/symbols_empty_space.txt b/test/yarp/fixtures/seattlerb/symbols_empty_space.txt
new file mode 100644
index 0000000000..16c2e68a2b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/symbols_empty_space.txt
@@ -0,0 +1 @@
+%i( )
diff --git a/test/yarp/fixtures/seattlerb/symbols_interp.txt b/test/yarp/fixtures/seattlerb/symbols_interp.txt
new file mode 100644
index 0000000000..63116eb632
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/symbols_interp.txt
@@ -0,0 +1 @@
+%i(a b#{1+1} c)
diff --git a/test/yarp/fixtures/seattlerb/thingy.txt b/test/yarp/fixtures/seattlerb/thingy.txt
new file mode 100644
index 0000000000..5aa598c4be
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/thingy.txt
@@ -0,0 +1,3 @@
+f.(42)
+
+f::(42)
diff --git a/test/yarp/fixtures/seattlerb/uminus_float.txt b/test/yarp/fixtures/seattlerb/uminus_float.txt
new file mode 100644
index 0000000000..1344bfd9db
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/uminus_float.txt
@@ -0,0 +1 @@
+-0.0
diff --git a/test/yarp/fixtures/seattlerb/unary_minus.txt b/test/yarp/fixtures/seattlerb/unary_minus.txt
new file mode 100644
index 0000000000..66af866f85
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/unary_minus.txt
@@ -0,0 +1 @@
+-a
diff --git a/test/yarp/fixtures/seattlerb/unary_plus.txt b/test/yarp/fixtures/seattlerb/unary_plus.txt
new file mode 100644
index 0000000000..daea40b71e
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/unary_plus.txt
@@ -0,0 +1 @@
++a
diff --git a/test/yarp/fixtures/seattlerb/unary_plus_on_literal.txt b/test/yarp/fixtures/seattlerb/unary_plus_on_literal.txt
new file mode 100644
index 0000000000..752331df47
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/unary_plus_on_literal.txt
@@ -0,0 +1 @@
++:a
diff --git a/test/yarp/fixtures/seattlerb/unary_tilde.txt b/test/yarp/fixtures/seattlerb/unary_tilde.txt
new file mode 100644
index 0000000000..f0a507b437
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/unary_tilde.txt
@@ -0,0 +1 @@
+~a
diff --git a/test/yarp/fixtures/seattlerb/utf8_bom.txt b/test/yarp/fixtures/seattlerb/utf8_bom.txt
new file mode 100644
index 0000000000..c8e9e1cbae
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/utf8_bom.txt
@@ -0,0 +1,3 @@
+#!/usr/bin/env ruby -w
+p 0
+
diff --git a/test/yarp/fixtures/seattlerb/when_splat.txt b/test/yarp/fixtures/seattlerb/when_splat.txt
new file mode 100644
index 0000000000..6b79f5dad0
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/when_splat.txt
@@ -0,0 +1 @@
+case a; when *b then; end
diff --git a/test/yarp/fixtures/seattlerb/words_interp.txt b/test/yarp/fixtures/seattlerb/words_interp.txt
new file mode 100644
index 0000000000..f71486495b
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/words_interp.txt
@@ -0,0 +1 @@
+%W(#{1}b)
diff --git a/test/yarp/fixtures/seattlerb/wtf.txt b/test/yarp/fixtures/seattlerb/wtf.txt
new file mode 100644
index 0000000000..7396a9a76f
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/wtf.txt
@@ -0,0 +1 @@
+->(a, b=nil) { p [a, b] }
diff --git a/test/yarp/fixtures/seattlerb/wtf_7.txt b/test/yarp/fixtures/seattlerb/wtf_7.txt
new file mode 100644
index 0000000000..048358bbdc
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/wtf_7.txt
@@ -0,0 +1 @@
+a.b (1) {c}
diff --git a/test/yarp/fixtures/seattlerb/wtf_8.txt b/test/yarp/fixtures/seattlerb/wtf_8.txt
new file mode 100644
index 0000000000..ba1cbc235d
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/wtf_8.txt
@@ -0,0 +1 @@
+a::b (1) {c}
diff --git a/test/yarp/fixtures/seattlerb/yield_arg.txt b/test/yarp/fixtures/seattlerb/yield_arg.txt
new file mode 100644
index 0000000000..7e752f62e2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/yield_arg.txt
@@ -0,0 +1 @@
+yield 42
diff --git a/test/yarp/fixtures/seattlerb/yield_call_assocs.txt b/test/yarp/fixtures/seattlerb/yield_call_assocs.txt
new file mode 100644
index 0000000000..95963dfcf9
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/yield_call_assocs.txt
@@ -0,0 +1,11 @@
+yield 1, :z => 1
+
+yield 1, :z => 1, :w => 2
+
+yield y :z=>1
+
+yield y z:1
+
+yield y(z:1)
+
+yield y(z=>1)
diff --git a/test/yarp/fixtures/seattlerb/yield_empty_parens.txt b/test/yarp/fixtures/seattlerb/yield_empty_parens.txt
new file mode 100644
index 0000000000..cff86b243a
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/yield_empty_parens.txt
@@ -0,0 +1 @@
+yield()
diff --git a/test/yarp/fixtures/seattlerb/zomg_sometimes_i_hate_this_project.txt b/test/yarp/fixtures/seattlerb/zomg_sometimes_i_hate_this_project.txt
new file mode 100644
index 0000000000..112b75c5f2
--- /dev/null
+++ b/test/yarp/fixtures/seattlerb/zomg_sometimes_i_hate_this_project.txt
@@ -0,0 +1,5 @@
+      {
+        a: lambda { b ? c() : d },
+        e: nil,
+      }
+
diff --git a/test/yarp/fixtures/single_quote_heredocs.txt b/test/yarp/fixtures/single_quote_heredocs.txt
new file mode 100644
index 0000000000..0122b2726c
--- /dev/null
+++ b/test/yarp/fixtures/single_quote_heredocs.txt
@@ -0,0 +1,3 @@
+<<-'EOS'
+    cd L:\Work\MG3710IQPro\Develop
+EOS
diff --git a/test/yarp/fixtures/strings.txt b/test/yarp/fixtures/strings.txt
new file mode 100644
index 0000000000..9d6cc77fc7
--- /dev/null
+++ b/test/yarp/fixtures/strings.txt
@@ -0,0 +1,99 @@
+%%abc%
+
+%^abc^
+
+%&abc&
+
+%*abc*
+
+%_abc_
+
+%+abc+
+
+%-abc-
+
+%:abc:
+
+%;abc;
+
+%'abc'
+
+%~abc~
+
+%?abc?
+
+%w{    }
+
+%/abc/
+
+%`abc`
+
+"#@@foo"
+
+%\abc\
+
+%{aaa #{bbb} ccc}
+
+%[foo[]]
+
+"foo" +
+
+"bar"
+
+%q{abc}
+
+%s[abc]
+
+%{abc}
+
+''
+
+"abc"
+
+"#@---"
+
+"aaa #{bbb} ccc"
+
+'abc'
+
+%w[a b c]
+
+%w[a[] b[[]] c[]]
+
+%w[foo\ bar \#{1}]
+
+%w[foo\ bar baz]
+
+%W[a b#{c}d e]
+
+%W[a b c]
+
+%w[
+  a
+  b
+  c
+]
+
+'\' foo \' bar'
+
+'\\ foo \\ bar'
+
+"#$foo"
+
+"#@foo"
+
+"\x7 \x23 \x61"
+
+"\7 \43 \141"
+
+%[abc]
+
+%(abc)
+
+%@abc@
+
+%$abc$
+
+?a
+
+%Q{abc}
diff --git a/test/yarp/fixtures/super.txt b/test/yarp/fixtures/super.txt
new file mode 100644
index 0000000000..b685035970
--- /dev/null
+++ b/test/yarp/fixtures/super.txt
@@ -0,0 +1,7 @@
+super
+
+super()
+
+super(1)
+
+super(1, 2, 3)
diff --git a/test/yarp/fixtures/symbols.txt b/test/yarp/fixtures/symbols.txt
new file mode 100644
index 0000000000..7563eb874f
--- /dev/null
+++ b/test/yarp/fixtures/symbols.txt
@@ -0,0 +1,93 @@
+:'abc'
+
+:"#{var}"
+
+:"abc#{1}"
+
+[:Υ, :ά, :ŗ, :ρ]
+
+:-@
+
+:-
+
+:%
+
+:|
+
+:+@
+
+:+
+
+:/
+
+:**
+
+:*
+
+:~@
+
+[1, 1.0, 1r, 1i]
+
+:~
+
+:a
+
+%i[a b c]
+
+%i[a b#{1} #{2}c d#{3}f]
+
+%I[a b#{1} #{2}c d#{3}f]
+
+:@@a
+
+:👍
+
+%i[a\b]
+
+:$a
+
+:@a
+
+:do
+
+:&
+
+:`
+
+:!@
+
+:!~
+
+:!
+
+:[]
+
+:[]=
+
+:^
+
+:==
+
+:===
+
+:=~
+
+:>=
+
+:>>
+
+:>
+
+:<=>
+
+:<=
+
+:<<
+
+:<
+
+:__LINE__
+
+:__FILE__
+
+:__ENCODING__
diff --git a/test/yarp/fixtures/ternary_operator.txt b/test/yarp/fixtures/ternary_operator.txt
new file mode 100644
index 0000000000..ca00ead321
--- /dev/null
+++ b/test/yarp/fixtures/ternary_operator.txt
@@ -0,0 +1,13 @@
+a ? b : c
+
+a ? defined? b : defined? c
+
+empty??true:nil
+
+empty??false:nil
+
+empty??nil:nil
+
+a??nil:nil
+
+a ?var1 : var2
diff --git a/test/yarp/fixtures/tilde_heredocs.txt b/test/yarp/fixtures/tilde_heredocs.txt
new file mode 100644
index 0000000000..415d4d42c8
--- /dev/null
+++ b/test/yarp/fixtures/tilde_heredocs.txt
@@ -0,0 +1,91 @@
+<<~EOF
+  a
+EOF
+
+<<~EOF
+	a
+  b
+		c
+EOF
+
+<<~EOF
+  #{1} a
+EOF
+
+<<~EOF
+  a #{1}
+EOF
+
+<<~EOF
+  a
+ #{1}
+EOF
+
+<<~EOF
+  a
+  #{1}
+EOF
+
+<<~EOF
+  a
+  b
+EOF
+
+<<~EOF
+  a
+   b
+EOF
+
+<<~EOF
+			a
+		b
+EOF
+
+<<~'EOF'
+  a #{1}
+EOF
+
+<<~EOF
+	a
+	 b
+EOF
+
+<<~EOF
+	 a
+	b
+EOF
+
+<<~EOF
+  	a
+        b
+EOF
+
+<<~EOF
+  a
+
+  b
+EOF
+
+<<~EOF
+  a
+
+  b
+EOF
+
+<<~EOF
+  a
+
+
+
+  b
+EOF
+
+<<~EOF
+
+  #{1}a
+    EOF
+
+<<~EOT
+  #{1}
+	b
+EOT
diff --git a/test/yarp/fixtures/undef.txt b/test/yarp/fixtures/undef.txt
new file mode 100644
index 0000000000..129c349433
--- /dev/null
+++ b/test/yarp/fixtures/undef.txt
@@ -0,0 +1,17 @@
+undef a
+
+undef a, b
+
+undef if
+
+undef <=>
+
+undef :a
+
+undef :a, :b, :c
+
+undef :'abc'
+
+undef :"abc#{1}"
+
+undef Constant
diff --git a/test/yarp/fixtures/unescaping.txt b/test/yarp/fixtures/unescaping.txt
new file mode 100644
index 0000000000..e2da5a696c
--- /dev/null
+++ b/test/yarp/fixtures/unescaping.txt
@@ -0,0 +1,9 @@
+["\c#{1}"]
+
+/\c#{1}/
+
+"\c#{1}"
+
+<<~HERE
+   \c#{1}
+HERE
diff --git a/test/yarp/fixtures/unless.txt b/test/yarp/fixtures/unless.txt
new file mode 100644
index 0000000000..410d460e69
--- /dev/null
+++ b/test/yarp/fixtures/unless.txt
@@ -0,0 +1,14 @@
+unless true; 1; end
+
+unless true
+1 else 2 end
+
+1 unless true
+
+break unless true
+
+next unless true
+
+return unless true
+
+foo :a, :b unless bar?
diff --git a/test/yarp/fixtures/unparser/LICENSE b/test/yarp/fixtures/unparser/LICENSE
new file mode 100644
index 0000000000..44863d7afb
--- /dev/null
+++ b/test/yarp/fixtures/unparser/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2013 Markus Schirp
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/test/yarp/fixtures/unparser/corpus/literal/alias.txt b/test/yarp/fixtures/unparser/corpus/literal/alias.txt
new file mode 100644
index 0000000000..fb06a295e8
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/alias.txt
@@ -0,0 +1,2 @@
+alias $foo $bar
+alias :foo :bar
diff --git a/test/yarp/fixtures/unparser/corpus/literal/assignment.txt b/test/yarp/fixtures/unparser/corpus/literal/assignment.txt
new file mode 100644
index 0000000000..84a74e8928
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/assignment.txt
@@ -0,0 +1,53 @@
+$a = 1
+($a, $b) = [1, 2]
+((a,), b) = 1
+(*a) = []
+(*foo) = [1, 2]
+(@@a, @@b) = [1, 2]
+(@a, @b) = [1, 2]
+(a, (b, c)) = [1, [2, 3]]
+(a, *) = [1, 2]
+(a, *foo) = [1, 2]
+(a, b) = [1, 2]
+(a, b) = foo
+(a,) = foo
+(a.foo, a.bar) = [1, 2]
+(a[*foo], a[1]) = [1, 2]
+(a[0], a[1]) = [1, 2]
+(*c.foo) = 1
+::Foo = ::Bar
+@@a = 1
+@a = 1
+CONST = 1
+Name::Spaced::CONST = 1
+a = ((b, c) = 1)
+a = 1
+foo = foo()
+foo.[]=()
+foo.[]=(1, 2)
+foo.[]=true
+foo[*index] = value
+foo[1..2] = value
+foo[] = 1
+foo[a, b] = value
+foo[index] = value
+x = %()
+x.x=%()
+x[%()] = bar
+a[%()] ||= bar
+@a ||= %()
+x = <<-HEREDOC
+  #{}
+HEREDOC
+x.x=<<-HEREDOC
+  #{}
+HEREDOC
+x[] = <<-HEREDOC
+  #{}
+HEREDOC
+a[<<-HEREDOC] ||= bar
+  #{}
+HEREDOC
+@a ||= <<-HEREDOC
+  #{}
+HEREDOC
diff --git a/test/yarp/fixtures/unparser/corpus/literal/block.txt b/test/yarp/fixtures/unparser/corpus/literal/block.txt
new file mode 100644
index 0000000000..b2baf1dc12
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/block.txt
@@ -0,0 +1,96 @@
+foo {
+}
+foo { |a|
+}
+foo { |a,|
+}
+foo { |a,; x|
+}
+foo { |a, b|
+}
+foo(1) {
+  nil
+}
+foo { |a, *b|
+  nil
+}
+foo { |a, *|
+  nil
+}
+foo {
+  bar
+}
+foo.bar { |(a, b), c|
+  d
+}
+foo.bar { |*a; b|
+}
+foo.bar { |a; b|
+}
+foo.bar { |; a, b|
+}
+foo.bar { |*|
+  d
+}
+foo.bar { |(*)|
+  d
+}
+foo.bar { |((*))|
+  d
+}
+foo.bar { |(a, (*))|
+  d
+}
+foo.bar { |(a, b)|
+  d
+}
+foo.bar {
+}.baz
+m do
+rescue Exception => e
+end
+m do
+  foo
+rescue Exception => bar
+  bar
+end
+m do
+  bar
+rescue SomeError, *bar
+  baz
+end
+m do
+  bar
+rescue SomeError, *bar => exception
+  baz
+end
+m do
+  bar
+rescue *bar
+  baz
+end
+m do
+  bar
+rescue LoadError
+end
+m do
+  bar
+rescue
+else
+  baz
+end
+m do
+  bar
+rescue *bar => exception
+  baz
+end
+m do
+ensure
+end
+m do
+rescue
+ensure
+end
+bar {
+  _1 + _2
+}
diff --git a/test/yarp/fixtures/unparser/corpus/literal/case.txt b/test/yarp/fixtures/unparser/corpus/literal/case.txt
new file mode 100644
index 0000000000..c455fd7c39
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/case.txt
@@ -0,0 +1,37 @@
+case
+when bar
+  baz
+when baz
+  bar
+end
+case foo
+when bar
+when baz
+  bar
+end
+case foo
+when bar
+  baz
+when baz
+  bar
+end
+case foo
+when bar, baz
+  :other
+end
+case foo
+when *bar
+  :value
+end
+case foo
+when bar
+  baz
+else
+  :foo
+end
+case foo
+when *bar | baz
+end
+case foo
+when *bar.baz=1
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/class.txt b/test/yarp/fixtures/unparser/corpus/literal/class.txt
new file mode 100644
index 0000000000..f0198625e9
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/class.txt
@@ -0,0 +1,35 @@
+class A
+end
+
+class << a
+end
+
+class << a
+  b
+end
+
+class A::B
+end
+
+class A::B::C
+end
+
+class A < B
+end
+
+class A < B::C
+end
+
+class A::B < C::D
+end
+
+class A
+  include(B.new)
+
+  def foo
+    :bar
+  end
+end
+
+class ::A
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/control.txt b/test/yarp/fixtures/unparser/corpus/literal/control.txt
new file mode 100644
index 0000000000..648782bc96
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/control.txt
@@ -0,0 +1,15 @@
+next
+return
+break
+retry
+redo
+return 1
+return 1, 2
+return true ? 1 : 2
+break true ? 1 : 2
+next true ? 1 : 2
+return true, if true
+  1
+else
+  2
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/def.txt b/test/yarp/fixtures/unparser/corpus/literal/def.txt
new file mode 100644
index 0000000000..61339bd4a6
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/def.txt
@@ -0,0 +1,134 @@
+def foo
+  a
+rescue
+  b
+else
+  c
+ensure
+  d
+end
+
+def foo
+  a rescue b
+rescue
+  b
+else
+  c
+ensure
+  d
+end
+
+def foo(bar:, baz:)
+end
+
+def foo
+end
+
+def foo
+  bar
+end
+
+def foo
+  foo
+rescue
+  bar
+ensure
+  baz
+end
+
+def foo
+  bar
+ensure
+  baz
+end
+
+def foo
+  bar
+rescue
+  baz
+end
+
+def foo(bar)
+  bar
+end
+
+def foo(bar, baz)
+  bar
+end
+
+def foo(bar = ())
+  bar
+end
+
+def foo(bar = (baz; nil))
+end
+
+def foo(bar = true)
+  bar
+end
+
+def foo(bar, baz = true)
+  bar
+end
+
+def foo(bar: 1)
+end
+
+def foo(bar: baz)
+end
+
+def foo(bar: bar())
+end
+
+def foo(*)
+  bar
+end
+
+def foo(*bar)
+  bar
+end
+
+def foo(bar, *baz)
+  bar
+end
+
+def foo(baz = true, *bor)
+  bar
+end
+
+def foo(baz = true, *bor, &block)
+  bar
+end
+
+def foo(bar, baz = true, *bor)
+  bar
+end
+
+def foo(&block)
+  bar
+end
+
+def foo(bar, &block)
+  bar
+end
+
+def foo
+  bar
+  baz
+end
+
+def f(((a)))
+end
+
+def foo(bar:, baz: "value")
+end
+
+def f
+  <<-HEREDOC
+    #{}
+  HEREDOC
+end
+
+def f
+  %()
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/defined.txt b/test/yarp/fixtures/unparser/corpus/literal/defined.txt
new file mode 100644
index 0000000000..65e7c370fd
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/defined.txt
@@ -0,0 +1,3 @@
+defined?(@foo)
+defined?(Foo)
+defined?(((a, b) = [1, 2]))
diff --git a/test/yarp/fixtures/unparser/corpus/literal/defs.txt b/test/yarp/fixtures/unparser/corpus/literal/defs.txt
new file mode 100644
index 0000000000..b70aa9efc5
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/defs.txt
@@ -0,0 +1,40 @@
+def self.foo
+end
+
+def self.foo
+  bar
+end
+
+def self.foo
+  bar
+  baz
+end
+
+def Foo.bar
+  bar
+end
+
+def (foo { |bar|
+}).bar
+  bar
+end
+
+def (foo(1)).bar
+  bar
+end
+
+def (Foo::Bar.baz).bar
+  baz
+end
+
+def (Foo::Bar).bar
+  baz
+end
+
+def Foo.bar
+  baz
+end
+
+def foo.bar
+  baz
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/dstr.txt b/test/yarp/fixtures/unparser/corpus/literal/dstr.txt
new file mode 100644
index 0000000000..8a912d28ed
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/dstr.txt
@@ -0,0 +1,37 @@
+if true
+  "#{}a"
+end
+if true
+  <<-HEREDOC
+a
+#{}a
+b
+  HEREDOC
+  x
+end
+<<-HEREDOC
+\#{}\#{}
+#{}
+#{}
+#{}
+HEREDOC
+<<-HEREDOC rescue nil
+#{}
+a
+HEREDOC
+"a#$1"
+"a#$a"
+"a#@a"
+"a#@@a"
+if true
+  return <<-HEREDOC
+    #{42}
+  HEREDOC
+end
+foo(<<-HEREDOC)
+  #{bar}
+HEREDOC
+foo(<<-HEREDOC) { |x|
+  #{bar}
+HEREDOC
+}
diff --git a/test/yarp/fixtures/unparser/corpus/literal/empty.txt b/test/yarp/fixtures/unparser/corpus/literal/empty.txt
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/empty.txt
diff --git a/test/yarp/fixtures/unparser/corpus/literal/empty_begin.txt b/test/yarp/fixtures/unparser/corpus/literal/empty_begin.txt
new file mode 100644
index 0000000000..6a452c185a
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/empty_begin.txt
@@ -0,0 +1 @@
+()
diff --git a/test/yarp/fixtures/unparser/corpus/literal/flipflop.txt b/test/yarp/fixtures/unparser/corpus/literal/flipflop.txt
new file mode 100644
index 0000000000..8badd39d57
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/flipflop.txt
@@ -0,0 +1,6 @@
+if ((i == 4)..(i == 4))
+  foo
+end
+if ((i == 4)...(i == 4))
+  foo
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/for.txt b/test/yarp/fixtures/unparser/corpus/literal/for.txt
new file mode 100644
index 0000000000..4c19a352d9
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/for.txt
@@ -0,0 +1,12 @@
+bar(for a in bar do
+  baz
+end)
+for a in bar do
+  baz
+end
+for (a, *b) in bar do
+  baz
+end
+for (a, b) in bar do
+  baz
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/hookexe.txt b/test/yarp/fixtures/unparser/corpus/literal/hookexe.txt
new file mode 100644
index 0000000000..08f14f47b3
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/hookexe.txt
@@ -0,0 +1,7 @@
+BEGIN {
+  foo
+}
+bar
+END {
+  baz
+}
diff --git a/test/yarp/fixtures/unparser/corpus/literal/if.txt b/test/yarp/fixtures/unparser/corpus/literal/if.txt
new file mode 100644
index 0000000000..0c13801f9e
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/if.txt
@@ -0,0 +1,36 @@
+if /foo/
+  bar
+end
+if 3
+  9
+end
+if 4
+  5
+else
+  6
+end
+unless 3
+  nil
+end
+unless 3
+  9
+end
+if foo
+end
+
+module A
+  foo = bar if foo
+end
+
+module B
+  foo = bar unless foo
+end
+unless foo
+  foo = bar
+end
+if foo { |pair|
+  pair
+}
+  pair = :foo
+  foo
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/kwbegin.txt b/test/yarp/fixtures/unparser/corpus/literal/kwbegin.txt
new file mode 100644
index 0000000000..6cc1e74ca6
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/kwbegin.txt
@@ -0,0 +1,80 @@
+begin
+rescue
+end
+
+begin
+ensure
+end
+
+begin
+  a
+end
+
+begin
+  a
+rescue
+  b
+end
+
+begin
+  a
+  b
+rescue
+  b
+end
+
+begin
+rescue A
+end
+
+begin
+rescue A => foo
+end
+
+begin
+  a
+rescue A
+  b
+rescue B
+  c
+ensure
+  d
+end
+
+begin
+  begin
+    foo
+    bar
+  rescue
+  end
+rescue
+  baz
+  bar
+end
+
+begin
+  raise(Exception) rescue foo = bar
+rescue Exception
+end
+
+begin
+  foo
+rescue => bar
+  bar
+end
+
+begin
+  foo
+rescue Exception, Other => bar
+  bar
+end
+
+begin
+  bar
+rescue SomeError, *bar => exception
+  baz
+end
+
+class << self
+  undef :bar rescue nil
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/lambda.txt b/test/yarp/fixtures/unparser/corpus/literal/lambda.txt
new file mode 100644
index 0000000000..4eb722dad1
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/lambda.txt
@@ -0,0 +1,13 @@
+lambda {
+}
+lambda { |a, b|
+  a
+}
+->() {
+}
+->(a) {
+}
+->(a, b) {
+}
+->(a, b; c) {
+}
diff --git a/test/yarp/fixtures/unparser/corpus/literal/literal.txt b/test/yarp/fixtures/unparser/corpus/literal/literal.txt
new file mode 100644
index 0000000000..2fc7cd1d79
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/literal.txt
@@ -0,0 +1,91 @@
+{ "foo" => <<-HEREDOC, "bar" => :baz }
+  #{}
+HEREDOC
+{ "foo" => %(), "bar" => :baz }
+["foo", %()]
+a(<<-HEREDOC).a
+  #{}
+HEREDOC
+a(%()).a
+{ "foo" => <<-HEREDOC, **baz }
+  #{}
+HEREDOC
+{ "foo" => %(), **baz }
+"#@a #@@a #$a"
+0
+++1
+1
+1
+1r
+1.5r
+1.3r
+5i
+-5i
+0.6i
+-0.6i
+1000000000000000000000000000000i
+1ri
+"foo" "bar"
+"foobar #{baz}"
+"foo#{1}bar"
+"\\\\#{}"
+"#{}\#{}"
+"\#{}#{}"
+"foo\\\#{@bar}"
+"\""
+"foo bar"
+"foo\nbar"
+`foo`
+`foo#{@bar}`
+`)`
+`\``
+`"`
+:foo
+:"A B"
+:foo
+:"A B"
+:"A\"B"
+:""
+/foo/
+/[^-+',.\/:@[:alnum:]\[\]]+/
+/foo#{@bar}/
+/foo#{@bar}/imx
+/#{"\u0000"}/
+/\n/
+/\n/
+/\n/x
+/\/\//x
+:"foo#{bar}baz"
+:"#{"foo"}"
+(0.0 / 0.0)..1
+1..(0.0 / 0.0)
+(0.0 / 0.0)..100
+-0.1
+0.1
+[1, 2]
+[1, (), n2]
+[1]
+[]
+[1, *@foo]
+[*@foo, 1]
+[*@foo, *@baz]
+{}
+{ () => () }
+{ 1 => 2 }
+{ 1 => 2, 3 => 4 }
+{ a: (1 rescue foo), b: 2 }
+{ a: 1, b: 2 }
+{ a: :a }
+{ :"a b" => 1 }
+{ :-@ => 1 }
+"#{}
+#{}\na"
+foo {
+  "#{}
+#{}\na"
+}
+:"a\\
+b"
+`  x
+#{foo}
+#`
diff --git a/test/yarp/fixtures/unparser/corpus/literal/module.txt b/test/yarp/fixtures/unparser/corpus/literal/module.txt
new file mode 100644
index 0000000000..cec03f3bfd
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/module.txt
@@ -0,0 +1,16 @@
+module A
+end
+
+module A::B
+end
+
+module A::B::C
+end
+
+module A
+  include(B.new)
+
+  def foo
+    :bar
+  end
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/opasgn.txt b/test/yarp/fixtures/unparser/corpus/literal/opasgn.txt
new file mode 100644
index 0000000000..5858d773d0
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/opasgn.txt
@@ -0,0 +1,24 @@
+a += 2
+a -= 2
+a **= 2
+a *= 2
+a /= 2
+a &&= b
+a ||= 2
+(a ||= 2).bar
+(h ||= {})[k] = v
+a.b += 2
+a.b -= 2
+a.b **= 2
+a.b *= 2
+a.b /= 2
+a.b &&= b
+a.b ||= 2
+a[b] += 2
+a[b] -= 2
+a[b] **= 2
+a[b] *= 2
+a[b] /= 2
+a[b] &&= b
+a[b] ||= 2
+foo.A += 1
diff --git a/test/yarp/fixtures/unparser/corpus/literal/pattern.txt b/test/yarp/fixtures/unparser/corpus/literal/pattern.txt
new file mode 100644
index 0000000000..7cfaa4dc67
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/pattern.txt
@@ -0,0 +1,41 @@
+case foo
+in A[1, 2, *a, 3] then
+  true
+in [1, 2, ] then
+  y
+in A(x:) then
+  true
+in {**a} then
+  true
+in {} if true then
+  true
+in [x, y, *] then
+  true
+in {a: 1, aa: 2} then
+  true
+in {} then
+  true
+in {**nil} then
+  true
+in {"a": 1} then
+  true
+in 1 | 2 then
+  true
+in 1 => a then
+  true
+in ^x then
+  true
+in 1
+in 2 then
+  true
+else
+  true
+end
+case foo
+in A[1, 2, *a, 3]
+end
+case foo
+in A
+else
+end
+1 in [a]
diff --git a/test/yarp/fixtures/unparser/corpus/literal/pragma.txt b/test/yarp/fixtures/unparser/corpus/literal/pragma.txt
new file mode 100644
index 0000000000..4f6dd71b38
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/pragma.txt
@@ -0,0 +1,4 @@
+__ENCODING__
+__FILE__
+__LINE__
+__dir__
diff --git a/test/yarp/fixtures/unparser/corpus/literal/range.txt b/test/yarp/fixtures/unparser/corpus/literal/range.txt
new file mode 100644
index 0000000000..eb1f3874c0
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/range.txt
@@ -0,0 +1,4 @@
+(1..)
+1..2
+(1...)
+1...2
diff --git a/test/yarp/fixtures/unparser/corpus/literal/rescue.txt b/test/yarp/fixtures/unparser/corpus/literal/rescue.txt
new file mode 100644
index 0000000000..a787816808
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/rescue.txt
@@ -0,0 +1,3 @@
+foo rescue bar
+foo rescue return bar
+x = (foo rescue return bar)
diff --git a/test/yarp/fixtures/unparser/corpus/literal/send.txt b/test/yarp/fixtures/unparser/corpus/literal/send.txt
new file mode 100644
index 0000000000..4361cf73cb
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/send.txt
@@ -0,0 +1,83 @@
+module A
+  foo ||= ((a, _) = b)
+end
+
+module A
+  local = 1
+  local.bar
+end
+class A
+end.bar
+module A
+end.bar
+begin
+rescue
+end.bar
+case (def foo
+end; :bar)
+when bar
+end.baz
+case foo
+when bar
+end.baz
+class << self
+end.bar
+def self.foo
+end.bar
+def foo
+end.bar
+until foo
+end.bar
+while foo
+end.bar
+loop {
+}.bar
+if foo
+end.baz
+(/bar/ =~ :foo).foo
+(1..2).max
+(foo =~ /bar/).foo
+/bar/ =~ :foo
+/bar/ =~ foo
+1..2.max
+A.foo
+FOO()
+a&.b
+a.foo
+foo
+foo << (bar * baz)
+foo =~ /bar/
+foo(&(foo || bar))
+foo(&block)
+foo(*args, &block)
+foo(*arguments)
+foo(1, 2)
+foo(bar)
+foo(bar, *args)
+foo(foo =~ /bar/)
+foo.bar(&baz)
+foo.bar(*arga, foo, *argb)
+foo.bar(*args)
+foo.bar(*args, foo)
+foo.bar(:baz, &baz)
+foo.bar(baz: boz)
+foo.bar(foo, "baz" => boz)
+foo.bar(foo, *args)
+foo.bar(foo, *args, &block)
+foo.bar(foo, {})
+foo.bar({ foo: boz }, boz)
+foo.bar=:baz
+foo(a: b)
+foo.&(a: b)
+foo.&(**a)
+foo[*baz]
+foo[1, 2]
+foo[]
+self.foo
+self.foo=:bar
+(a + b) / (c - d)
+(a + b) / c.-(e, f)
+(a + b) / c.-(*f)
+x(**foo)
+foo&.!
+foo.~(b)
diff --git a/test/yarp/fixtures/unparser/corpus/literal/since/27.txt b/test/yarp/fixtures/unparser/corpus/literal/since/27.txt
new file mode 100644
index 0000000000..c332f9e48e
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/since/27.txt
@@ -0,0 +1,4 @@
+-> {
+  _1 + _2
+}
+(..1)
diff --git a/test/yarp/fixtures/unparser/corpus/literal/since/30.txt b/test/yarp/fixtures/unparser/corpus/literal/since/30.txt
new file mode 100644
index 0000000000..b73328a4b0
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/since/30.txt
@@ -0,0 +1,4 @@
+1 => [a]
+1 => [*]
+1 in [*, 42, *]
+1 in [*, a, *foo]
diff --git a/test/yarp/fixtures/unparser/corpus/literal/since/31.txt b/test/yarp/fixtures/unparser/corpus/literal/since/31.txt
new file mode 100644
index 0000000000..504eb94d5b
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/since/31.txt
@@ -0,0 +1,7 @@
+def foo(&)
+  bar(&)
+end
+
+def foo(a, &)
+  bar(&)
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/since/32.txt b/test/yarp/fixtures/unparser/corpus/literal/since/32.txt
new file mode 100644
index 0000000000..fa279f11cf
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/since/32.txt
@@ -0,0 +1,7 @@
+def foo(argument, **)
+  bar(argument, **)
+end
+
+def foo(argument, *)
+  bar(argument, *)
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/singletons.txt b/test/yarp/fixtures/unparser/corpus/literal/singletons.txt
new file mode 100644
index 0000000000..496e6a41ce
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/singletons.txt
@@ -0,0 +1,4 @@
+false
+nil
+self
+true
diff --git a/test/yarp/fixtures/unparser/corpus/literal/super.txt b/test/yarp/fixtures/unparser/corpus/literal/super.txt
new file mode 100644
index 0000000000..0e73e6f052
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/super.txt
@@ -0,0 +1,21 @@
+super
+super()
+super(a)
+super(a, b)
+super(&block)
+super(a, &block)
+super(a {
+  foo
+})
+super {
+  foo
+}
+super(a) {
+  foo
+}
+super() {
+  foo
+}
+super(a, b) {
+  foo
+}
diff --git a/test/yarp/fixtures/unparser/corpus/literal/unary.txt b/test/yarp/fixtures/unparser/corpus/literal/unary.txt
new file mode 100644
index 0000000000..77685cb71d
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/unary.txt
@@ -0,0 +1,8 @@
+!1
+!(!1)
+!(!(foo || bar))
+!(!1).baz
+~a
+-a
++a
+-(-a).foo
diff --git a/test/yarp/fixtures/unparser/corpus/literal/undef.txt b/test/yarp/fixtures/unparser/corpus/literal/undef.txt
new file mode 100644
index 0000000000..a65d8d0cc4
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/undef.txt
@@ -0,0 +1,2 @@
+undef :foo
+undef :foo, :bar
diff --git a/test/yarp/fixtures/unparser/corpus/literal/variables.txt b/test/yarp/fixtures/unparser/corpus/literal/variables.txt
new file mode 100644
index 0000000000..1de938f376
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/variables.txt
@@ -0,0 +1,10 @@
+a
+@a
+@@a
+$a
+$1
+$`
+CONST
+SCOPED::CONST
+::TOPLEVEL
+::TOPLEVEL::CONST
diff --git a/test/yarp/fixtures/unparser/corpus/literal/while.txt b/test/yarp/fixtures/unparser/corpus/literal/while.txt
new file mode 100644
index 0000000000..19a60ef5ff
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/while.txt
@@ -0,0 +1,73 @@
+module A
+  foo { |bar|
+    while foo
+      foo = bar
+    end
+  }
+end
+
+def foo
+  foo = bar while foo != baz
+end
+
+module A
+  foo = bar while foo
+end
+
+module A
+  foo = bar until foo
+end
+
+module A
+  while foo
+    foo = bar
+  end
+end
+
+module A
+  each { |baz|
+    while foo
+      foo = bar
+    end
+  }
+end
+
+module A
+  each { |foo|
+    while foo
+      foo = bar
+    end
+  }
+end
+x = (begin
+  foo
+end while baz)
+begin
+  foo
+end while baz
+begin
+  foo
+  bar
+end until baz
+begin
+  foo
+  bar
+end while baz
+while false
+end
+while false
+  3
+end
+while (foo {
+})
+  :body
+end
+until false
+end
+until false
+  3
+end
+until (foo {
+})
+  :body
+end
diff --git a/test/yarp/fixtures/unparser/corpus/literal/yield.txt b/test/yarp/fixtures/unparser/corpus/literal/yield.txt
new file mode 100644
index 0000000000..c0b5820842
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/literal/yield.txt
@@ -0,0 +1,3 @@
+yield
+yield(a)
+yield(a, b)
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/and.txt b/test/yarp/fixtures/unparser/corpus/semantic/and.txt
new file mode 100644
index 0000000000..43d1712445
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/and.txt
@@ -0,0 +1,8 @@
+a...b or c...d
+a...b and c...d
+
+if a...b or c...d
+end
+
+if a...b and c...d
+end
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/block.txt b/test/yarp/fixtures/unparser/corpus/semantic/block.txt
new file mode 100644
index 0000000000..5891690025
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/block.txt
@@ -0,0 +1,26 @@
+foo do
+end
+
+foo do
+rescue
+end
+
+foo do
+  nil rescue nil
+  nil
+end
+
+foo do |a|
+end
+
+foo(<<-DOC) do |a|
+  b
+DOC
+  a
+end
+
+foo(<<-DOC) do
+  b
+DOC
+  a
+end
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/def.txt b/test/yarp/fixtures/unparser/corpus/semantic/def.txt
new file mode 100644
index 0000000000..7574619392
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/def.txt
@@ -0,0 +1,7 @@
+def foo
+  (a - b)
+end
+
+def foo
+  a rescue Exception
+end
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/dstr.txt b/test/yarp/fixtures/unparser/corpus/semantic/dstr.txt
new file mode 100644
index 0000000000..919e736077
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/dstr.txt
@@ -0,0 +1,127 @@
+<<DOC
+DOC
+
+<<'DOC'
+DOC
+
+<<~DOC
+DOC
+
+<<~'DOC'
+DOC
+
+<<DOC
+  a
+DOC
+
+<<'DOC'
+  a
+DOC
+
+<<DOC
+  a
+  #{}
+DOC
+
+<<~DOC
+  a
+  #{}
+DOC
+
+<<~DOC
+  a
+  #{}
+  b
+DOC
+
+<<~DOC
+  a
+    b
+DOC
+
+<<'DOC'
+a
+
+b
+DOC
+
+<<'DOC'
+ a
+
+ b
+DOC
+
+<<'DOC'
+ a\nb
+DOC
+
+<<DOC
+#{}a
+ #{}a
+DOC
+
+<<DOC
+  #{}
+  \#{}
+DOC
+
+<<DOC
+ a#{}b
+ c
+DOC
+
+<<~DOC
+  #{}
+DOC
+
+if true
+  <<~DOC
+    #{}
+  DOC
+end
+
+if true
+  <<~DOC
+    b#{}
+  DOC
+end
+
+if true
+  <<~DOC
+    #{}a
+  DOC
+end
+
+if true
+  <<-'DOC'
+   a
+
+   b
+  DOC
+end
+
+"#{}a"
+
+%(\n"#{}"\n)
+
+%Q(-\n"#{}"\n)
+
+"a
+#{}
+b"
+
+"a\n#{}
+b"
+
+"a
+#{}\nb"
+
+'a' \
+"#{}"
+
+"" "" ""
+
+"a#{@a}" "b"
+"a#@a" "b"
+"a#$a" "b"
+"a#@@a" "b"
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/kwbegin.txt b/test/yarp/fixtures/unparser/corpus/semantic/kwbegin.txt
new file mode 100644
index 0000000000..d275a96a5c
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/kwbegin.txt
@@ -0,0 +1,42 @@
+begin
+rescue
+end
+
+begin
+rescue
+else
+end
+
+begin
+  a
+end
+
+begin
+  a
+rescue
+  b
+end
+
+begin
+  a
+  b
+rescue
+  b
+end
+
+begin
+rescue A
+else
+end
+
+begin; rescue A; else; end
+
+begin
+  a
+rescue A
+  b
+rescue B
+  c
+ensure
+  d
+end
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/literal.txt b/test/yarp/fixtures/unparser/corpus/semantic/literal.txt
new file mode 100644
index 0000000000..c424db5a53
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/literal.txt
@@ -0,0 +1,14 @@
+1.0r
+-0r
+0x1
+1_000
+1e10
+10e10000000000
+-10e10000000000
+?c
+%r(/)
+%r(\))
+%r(#{@bar}baz)
+10.2e10000000000
+-10.2e10000000000
+w(foo bar)
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/send.txt b/test/yarp/fixtures/unparser/corpus/semantic/send.txt
new file mode 100644
index 0000000000..a65b27d2f2
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/send.txt
@@ -0,0 +1,6 @@
+foo
+foo(1)
+
+a.===(b).c == d
+
+a == d.c.===(c)
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/undef.txt b/test/yarp/fixtures/unparser/corpus/semantic/undef.txt
new file mode 100644
index 0000000000..47debc3114
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/undef.txt
@@ -0,0 +1,2 @@
+undef foo
+undef foo, bar
diff --git a/test/yarp/fixtures/unparser/corpus/semantic/while.txt b/test/yarp/fixtures/unparser/corpus/semantic/while.txt
new file mode 100644
index 0000000000..a55dcc52fc
--- /dev/null
+++ b/test/yarp/fixtures/unparser/corpus/semantic/while.txt
@@ -0,0 +1,25 @@
+a until b? {}
+
+until b? {}
+  a
+end
+
+foo = bar while foo
+
+a until b && a { }
+
+while a = b
+  a
+end
+
+a until b(<<-FOO) do
+FOO
+  c
+end
+
+module A
+  foo = exp
+  while foo
+    foo = bar
+  end
+end
diff --git a/test/yarp/fixtures/until.txt b/test/yarp/fixtures/until.txt
new file mode 100644
index 0000000000..fa93819e25
--- /dev/null
+++ b/test/yarp/fixtures/until.txt
@@ -0,0 +1,11 @@
+until true; 1; end
+
+1 until true
+
+break until true
+
+next until true
+
+return until true
+
+foo :a, :b until bar?
diff --git a/test/yarp/fixtures/variables.txt b/test/yarp/fixtures/variables.txt
new file mode 100644
index 0000000000..276dc3b3f1
--- /dev/null
+++ b/test/yarp/fixtures/variables.txt
@@ -0,0 +1,46 @@
+@@abc
+
+@@abc = 1
+
+@@foo, @@bar = 1
+
+@@foo = 1, 2
+
+$abc = 1
+
+$abc
+
+@abc
+
+@abc = 1
+
+a
+
+abc = 1
+
+$foo, $bar = 1
+
+$foo = 1, 2
+
+@foo, @bar = 1
+
+@foo = 1, 2
+
+foo = 1; foo = 1, 2
+
+foo = 1, 2
+
+foo, * = 1, 2
+
+foo, = 1, 2
+
+foo, *bar = 1, 2
+
+foo, (bar, baz) = 1, [2, 3]
+
+foo = *bar
+
+Foo = 1, 2
+
+(a; b; c)
+
diff --git a/test/yarp/fixtures/while.txt b/test/yarp/fixtures/while.txt
new file mode 100644
index 0000000000..ed5ea0f45c
--- /dev/null
+++ b/test/yarp/fixtures/while.txt
@@ -0,0 +1,19 @@
+while true; 1; end
+
+1 while true
+
+break while true
+
+next while true
+
+return while true
+
+foo :a, :b while bar?
+
+while def self.foo a = tap do end; end; break; end
+
+while class Foo a = tap do end; end; break; end
+
+while class << self; tap do end; end; break; end
+
+while class << self; a = tap do end; end; break; end
diff --git a/test/yarp/fixtures/whitequark/LICENSE b/test/yarp/fixtures/whitequark/LICENSE
new file mode 100644
index 0000000000..971310e3d6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/LICENSE
@@ -0,0 +1,25 @@
+Copyright (c) 2013-2016 whitequark  <whitequark@whitequark.org>
+
+Parts of the source are derived from ruby_parser:
+Copyright (c) Ryan Davis, seattle.rb
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/test/yarp/fixtures/whitequark/__ENCODING__.txt b/test/yarp/fixtures/whitequark/__ENCODING__.txt
new file mode 100644
index 0000000000..d6debf2f92
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/__ENCODING__.txt
@@ -0,0 +1 @@
+__ENCODING__
diff --git a/test/yarp/fixtures/whitequark/__ENCODING___legacy_.txt b/test/yarp/fixtures/whitequark/__ENCODING___legacy_.txt
new file mode 100644
index 0000000000..d6debf2f92
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/__ENCODING___legacy_.txt
@@ -0,0 +1 @@
+__ENCODING__
diff --git a/test/yarp/fixtures/whitequark/alias.txt b/test/yarp/fixtures/whitequark/alias.txt
new file mode 100644
index 0000000000..e33b120022
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/alias.txt
@@ -0,0 +1 @@
+alias :foo bar
diff --git a/test/yarp/fixtures/whitequark/alias_gvar.txt b/test/yarp/fixtures/whitequark/alias_gvar.txt
new file mode 100644
index 0000000000..b975d97f8e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/alias_gvar.txt
@@ -0,0 +1,3 @@
+alias $a $+
+
+alias $a $b
diff --git a/test/yarp/fixtures/whitequark/ambiuous_quoted_label_in_ternary_operator.txt b/test/yarp/fixtures/whitequark/ambiuous_quoted_label_in_ternary_operator.txt
new file mode 100644
index 0000000000..9b2e3afad5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ambiuous_quoted_label_in_ternary_operator.txt
@@ -0,0 +1 @@
+a ? b & '': nil
diff --git a/test/yarp/fixtures/whitequark/and.txt b/test/yarp/fixtures/whitequark/and.txt
new file mode 100644
index 0000000000..43fa6a65cd
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/and.txt
@@ -0,0 +1,3 @@
+foo && bar
+
+foo and bar
diff --git a/test/yarp/fixtures/whitequark/and_asgn.txt b/test/yarp/fixtures/whitequark/and_asgn.txt
new file mode 100644
index 0000000000..a979265914
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/and_asgn.txt
@@ -0,0 +1,3 @@
+foo.a &&= 1
+
+foo[0, 1] &&= 2
diff --git a/test/yarp/fixtures/whitequark/and_or_masgn.txt b/test/yarp/fixtures/whitequark/and_or_masgn.txt
new file mode 100644
index 0000000000..e346041604
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/and_or_masgn.txt
@@ -0,0 +1,3 @@
+foo && (a, b = bar)
+
+foo || (a, b = bar)
diff --git a/test/yarp/fixtures/whitequark/anonymous_blockarg.txt b/test/yarp/fixtures/whitequark/anonymous_blockarg.txt
new file mode 100644
index 0000000000..e3eaaad6ce
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/anonymous_blockarg.txt
@@ -0,0 +1 @@
+def foo(&); bar(&); end
diff --git a/test/yarp/fixtures/whitequark/arg.txt b/test/yarp/fixtures/whitequark/arg.txt
new file mode 100644
index 0000000000..b1984ad5c4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/arg.txt
@@ -0,0 +1,3 @@
+def f(foo); end
+
+def f(foo, bar); end
diff --git a/test/yarp/fixtures/whitequark/arg_duplicate_ignored.txt b/test/yarp/fixtures/whitequark/arg_duplicate_ignored.txt
new file mode 100644
index 0000000000..0f5cc33961
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/arg_duplicate_ignored.txt
@@ -0,0 +1,3 @@
+def foo(_, _); end
+
+def foo(_a, _a); end
diff --git a/test/yarp/fixtures/whitequark/arg_label.txt b/test/yarp/fixtures/whitequark/arg_label.txt
new file mode 100644
index 0000000000..82db416cb4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/arg_label.txt
@@ -0,0 +1,6 @@
+def foo
+ a:b end
+
+def foo() a:b end
+
+f { || a:b }
diff --git a/test/yarp/fixtures/whitequark/arg_scope.txt b/test/yarp/fixtures/whitequark/arg_scope.txt
new file mode 100644
index 0000000000..6c67ab72e3
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/arg_scope.txt
@@ -0,0 +1 @@
+lambda{|;a|a}
diff --git a/test/yarp/fixtures/whitequark/args.txt b/test/yarp/fixtures/whitequark/args.txt
new file mode 100644
index 0000000000..773be477d3
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args.txt
@@ -0,0 +1,63 @@
+def f &b; end
+
+def f (((a))); end
+
+def f ((*)); end
+
+def f ((*, p)); end
+
+def f ((*r)); end
+
+def f ((*r, p)); end
+
+def f ((a, *)); end
+
+def f ((a, *, p)); end
+
+def f ((a, *r)); end
+
+def f ((a, *r, p)); end
+
+def f ((a, a1)); end
+
+def f (foo: 1, &b); end
+
+def f (foo: 1, bar: 2, **baz, &b); end
+
+def f **baz, &b; end
+
+def f *, **; end
+
+def f *r, &b; end
+
+def f *r, p, &b; end
+
+def f ; end
+
+def f a, &b; end
+
+def f a, *r, &b; end
+
+def f a, *r, p, &b; end
+
+def f a, o=1, &b; end
+
+def f a, o=1, *r, &b; end
+
+def f a, o=1, *r, p, &b; end
+
+def f a, o=1, p, &b; end
+
+def f foo:
+; end
+
+def f foo: -1
+; end
+
+def f o=1, &b; end
+
+def f o=1, *r, &b; end
+
+def f o=1, *r, p, &b; end
+
+def f o=1, p, &b; end
diff --git a/test/yarp/fixtures/whitequark/args_args_assocs.txt b/test/yarp/fixtures/whitequark/args_args_assocs.txt
new file mode 100644
index 0000000000..445f899442
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_args_assocs.txt
@@ -0,0 +1,3 @@
+fun(foo, :foo => 1)
+
+fun(foo, :foo => 1, &baz)
diff --git a/test/yarp/fixtures/whitequark/args_args_assocs_comma.txt b/test/yarp/fixtures/whitequark/args_args_assocs_comma.txt
new file mode 100644
index 0000000000..b566a59037
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_args_assocs_comma.txt
@@ -0,0 +1 @@
+foo[bar, :baz => 1,]
diff --git a/test/yarp/fixtures/whitequark/args_args_comma.txt b/test/yarp/fixtures/whitequark/args_args_comma.txt
new file mode 100644
index 0000000000..80770716dd
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_args_comma.txt
@@ -0,0 +1 @@
+foo[bar,]
diff --git a/test/yarp/fixtures/whitequark/args_args_star.txt b/test/yarp/fixtures/whitequark/args_args_star.txt
new file mode 100644
index 0000000000..d4dc9cc579
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_args_star.txt
@@ -0,0 +1,3 @@
+fun(foo, *bar)
+
+fun(foo, *bar, &baz)
diff --git a/test/yarp/fixtures/whitequark/args_assocs.txt b/test/yarp/fixtures/whitequark/args_assocs.txt
new file mode 100644
index 0000000000..b33e131181
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_assocs.txt
@@ -0,0 +1,11 @@
+fun(:foo => 1)
+
+fun(:foo => 1, &baz)
+
+self.[]= foo, :a => 1
+
+self[:bar => 1]
+
+super(:foo => 42)
+
+yield(:foo => 42)
diff --git a/test/yarp/fixtures/whitequark/args_assocs_comma.txt b/test/yarp/fixtures/whitequark/args_assocs_comma.txt
new file mode 100644
index 0000000000..15e5cd65dc
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_assocs_comma.txt
@@ -0,0 +1 @@
+foo[:baz => 1,]
diff --git a/test/yarp/fixtures/whitequark/args_assocs_legacy.txt b/test/yarp/fixtures/whitequark/args_assocs_legacy.txt
new file mode 100644
index 0000000000..b33e131181
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_assocs_legacy.txt
@@ -0,0 +1,11 @@
+fun(:foo => 1)
+
+fun(:foo => 1, &baz)
+
+self.[]= foo, :a => 1
+
+self[:bar => 1]
+
+super(:foo => 42)
+
+yield(:foo => 42)
diff --git a/test/yarp/fixtures/whitequark/args_block_pass.txt b/test/yarp/fixtures/whitequark/args_block_pass.txt
new file mode 100644
index 0000000000..35d7d23885
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_block_pass.txt
@@ -0,0 +1 @@
+fun(&bar)
diff --git a/test/yarp/fixtures/whitequark/args_cmd.txt b/test/yarp/fixtures/whitequark/args_cmd.txt
new file mode 100644
index 0000000000..dd0c8891d0
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_cmd.txt
@@ -0,0 +1 @@
+fun(f bar)
diff --git a/test/yarp/fixtures/whitequark/args_star.txt b/test/yarp/fixtures/whitequark/args_star.txt
new file mode 100644
index 0000000000..ce1e6f8465
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/args_star.txt
@@ -0,0 +1,3 @@
+fun(*bar)
+
+fun(*bar, &baz)
diff --git a/test/yarp/fixtures/whitequark/array_assocs.txt b/test/yarp/fixtures/whitequark/array_assocs.txt
new file mode 100644
index 0000000000..fcecfcdefc
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_assocs.txt
@@ -0,0 +1,3 @@
+[ 1 => 2 ]
+
+[ 1, 2 => 3 ]
diff --git a/test/yarp/fixtures/whitequark/array_plain.txt b/test/yarp/fixtures/whitequark/array_plain.txt
new file mode 100644
index 0000000000..44e2ace7e5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_plain.txt
@@ -0,0 +1 @@
+[1, 2]
diff --git a/test/yarp/fixtures/whitequark/array_splat.txt b/test/yarp/fixtures/whitequark/array_splat.txt
new file mode 100644
index 0000000000..144c1eb124
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_splat.txt
@@ -0,0 +1,5 @@
+[*foo]
+
+[1, *foo, 2]
+
+[1, *foo]
diff --git a/test/yarp/fixtures/whitequark/array_symbols.txt b/test/yarp/fixtures/whitequark/array_symbols.txt
new file mode 100644
index 0000000000..a9f9df0404
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_symbols.txt
@@ -0,0 +1 @@
+%i[foo bar]
diff --git a/test/yarp/fixtures/whitequark/array_symbols_empty.txt b/test/yarp/fixtures/whitequark/array_symbols_empty.txt
new file mode 100644
index 0000000000..da3a89ee9b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_symbols_empty.txt
@@ -0,0 +1,3 @@
+%I()
+
+%i[]
diff --git a/test/yarp/fixtures/whitequark/array_symbols_interp.txt b/test/yarp/fixtures/whitequark/array_symbols_interp.txt
new file mode 100644
index 0000000000..d4950d0c05
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_symbols_interp.txt
@@ -0,0 +1,3 @@
+%I[foo #{bar}]
+
+%I[foo#{bar}]
diff --git a/test/yarp/fixtures/whitequark/array_words.txt b/test/yarp/fixtures/whitequark/array_words.txt
new file mode 100644
index 0000000000..a07380cadc
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_words.txt
@@ -0,0 +1 @@
+%w[foo bar]
diff --git a/test/yarp/fixtures/whitequark/array_words_empty.txt b/test/yarp/fixtures/whitequark/array_words_empty.txt
new file mode 100644
index 0000000000..7568263f4a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_words_empty.txt
@@ -0,0 +1,3 @@
+%W()
+
+%w[]
diff --git a/test/yarp/fixtures/whitequark/array_words_interp.txt b/test/yarp/fixtures/whitequark/array_words_interp.txt
new file mode 100644
index 0000000000..1460f7dc03
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/array_words_interp.txt
@@ -0,0 +1,3 @@
+%W[foo #{bar}]
+
+%W[foo #{bar}foo#@baz]
diff --git a/test/yarp/fixtures/whitequark/asgn_cmd.txt b/test/yarp/fixtures/whitequark/asgn_cmd.txt
new file mode 100644
index 0000000000..81f8cc1c8d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/asgn_cmd.txt
@@ -0,0 +1,3 @@
+foo = bar = m foo
+
+foo = m foo
diff --git a/test/yarp/fixtures/whitequark/asgn_mrhs.txt b/test/yarp/fixtures/whitequark/asgn_mrhs.txt
new file mode 100644
index 0000000000..f0b0055e55
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/asgn_mrhs.txt
@@ -0,0 +1,5 @@
+foo = *bar
+
+foo = bar, 1
+
+foo = baz, *bar
diff --git a/test/yarp/fixtures/whitequark/back_ref.txt b/test/yarp/fixtures/whitequark/back_ref.txt
new file mode 100644
index 0000000000..03166e10ee
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/back_ref.txt
@@ -0,0 +1 @@
+$+
diff --git a/test/yarp/fixtures/whitequark/bang.txt b/test/yarp/fixtures/whitequark/bang.txt
new file mode 100644
index 0000000000..6cf9410cf5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bang.txt
@@ -0,0 +1 @@
+!foo
diff --git a/test/yarp/fixtures/whitequark/bang_cmd.txt b/test/yarp/fixtures/whitequark/bang_cmd.txt
new file mode 100644
index 0000000000..0a5252c001
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bang_cmd.txt
@@ -0,0 +1 @@
+!m foo
diff --git a/test/yarp/fixtures/whitequark/begin_cmdarg.txt b/test/yarp/fixtures/whitequark/begin_cmdarg.txt
new file mode 100644
index 0000000000..a5873668e9
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/begin_cmdarg.txt
@@ -0,0 +1 @@
+p begin 1.times do 1 end end
diff --git a/test/yarp/fixtures/whitequark/beginless_erange_after_newline.txt b/test/yarp/fixtures/whitequark/beginless_erange_after_newline.txt
new file mode 100644
index 0000000000..ae6c75564a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/beginless_erange_after_newline.txt
@@ -0,0 +1,2 @@
+foo
+...100
diff --git a/test/yarp/fixtures/whitequark/beginless_irange_after_newline.txt b/test/yarp/fixtures/whitequark/beginless_irange_after_newline.txt
new file mode 100644
index 0000000000..bfc8d5e5e8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/beginless_irange_after_newline.txt
@@ -0,0 +1,2 @@
+foo
+..100
diff --git a/test/yarp/fixtures/whitequark/beginless_range.txt b/test/yarp/fixtures/whitequark/beginless_range.txt
new file mode 100644
index 0000000000..ef52703b8a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/beginless_range.txt
@@ -0,0 +1,3 @@
+...100
+
+..100
diff --git a/test/yarp/fixtures/whitequark/blockarg.txt b/test/yarp/fixtures/whitequark/blockarg.txt
new file mode 100644
index 0000000000..63552e97be
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/blockarg.txt
@@ -0,0 +1 @@
+def f(&block); end
diff --git a/test/yarp/fixtures/whitequark/blockargs.txt b/test/yarp/fixtures/whitequark/blockargs.txt
new file mode 100644
index 0000000000..cdd2c4f331
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/blockargs.txt
@@ -0,0 +1,71 @@
+f{  }
+
+f{ | | }
+
+f{ |&b| }
+
+f{ |**baz, &b| }
+
+f{ |*, &b| }
+
+f{ |*r, p, &b| }
+
+f{ |*s, &b| }
+
+f{ |*s| }
+
+f{ |*| }
+
+f{ |;
+a
+| }
+
+f{ |;a| }
+
+f{ |a, &b| }
+
+f{ |a, *, &b| }
+
+f{ |a, *r, p, &b| }
+
+f{ |a, *s, &b| }
+
+f{ |a, *s| }
+
+f{ |a, *| }
+
+f{ |a, b,| }
+
+f{ |a, c| }
+
+f{ |a, o=1, &b| }
+
+f{ |a, o=1, *r, p, &b| }
+
+f{ |a, o=1, o1=2, *r, &b| }
+
+f{ |a, o=1, p, &b| }
+
+f{ |a,| }
+
+f{ |a| }
+
+f{ |a| }
+
+f{ |a| }
+
+f{ |foo: 1, &b| }
+
+f{ |foo: 1, bar: 2, **baz, &b| }
+
+f{ |foo:| }
+
+f{ |o=1, &b| }
+
+f{ |o=1, *r, &b| }
+
+f{ |o=1, *r, p, &b| }
+
+f{ |o=1, p, &b| }
+
+f{ || }
diff --git a/test/yarp/fixtures/whitequark/break.txt b/test/yarp/fixtures/whitequark/break.txt
new file mode 100644
index 0000000000..da51ec7c31
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/break.txt
@@ -0,0 +1,7 @@
+break
+
+break foo
+
+break()
+
+break(foo)
diff --git a/test/yarp/fixtures/whitequark/break_block.txt b/test/yarp/fixtures/whitequark/break_block.txt
new file mode 100644
index 0000000000..4b58c58d5e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/break_block.txt
@@ -0,0 +1 @@
+break fun foo do end
diff --git a/test/yarp/fixtures/whitequark/bug_435.txt b/test/yarp/fixtures/whitequark/bug_435.txt
new file mode 100644
index 0000000000..3e4e0d5abd
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_435.txt
@@ -0,0 +1 @@
+"#{-> foo {}}"
diff --git a/test/yarp/fixtures/whitequark/bug_447.txt b/test/yarp/fixtures/whitequark/bug_447.txt
new file mode 100644
index 0000000000..7da59bbc2f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_447.txt
@@ -0,0 +1,3 @@
+m [] do end
+
+m [], 1 do end
diff --git a/test/yarp/fixtures/whitequark/bug_452.txt b/test/yarp/fixtures/whitequark/bug_452.txt
new file mode 100644
index 0000000000..8b41dd6027
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_452.txt
@@ -0,0 +1 @@
+td (1_500).toString(); td.num do; end
diff --git a/test/yarp/fixtures/whitequark/bug_466.txt b/test/yarp/fixtures/whitequark/bug_466.txt
new file mode 100644
index 0000000000..ad02ad38ae
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_466.txt
@@ -0,0 +1 @@
+foo "#{(1+1).to_i}" do; end
diff --git a/test/yarp/fixtures/whitequark/bug_473.txt b/test/yarp/fixtures/whitequark/bug_473.txt
new file mode 100644
index 0000000000..0d2ea883a1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_473.txt
@@ -0,0 +1 @@
+m "#{[]}"
diff --git a/test/yarp/fixtures/whitequark/bug_480.txt b/test/yarp/fixtures/whitequark/bug_480.txt
new file mode 100644
index 0000000000..0558b2c957
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_480.txt
@@ -0,0 +1 @@
+m "#{}#{()}"
diff --git a/test/yarp/fixtures/whitequark/bug_481.txt b/test/yarp/fixtures/whitequark/bug_481.txt
new file mode 100644
index 0000000000..6328e9dbbd
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_481.txt
@@ -0,0 +1 @@
+m def x(); end; 1.tap do end
diff --git a/test/yarp/fixtures/whitequark/bug_ascii_8bit_in_literal.txt b/test/yarp/fixtures/whitequark/bug_ascii_8bit_in_literal.txt
new file mode 100644
index 0000000000..85399bd19a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_ascii_8bit_in_literal.txt
@@ -0,0 +1,2 @@
+# coding:utf-8
+         "\xD0\xBF\xD1\x80\xD0\xBE\xD0\xB2\xD0\xB5\xD1\x80\xD0\xBA\xD0\xB0"
diff --git a/test/yarp/fixtures/whitequark/bug_cmd_string_lookahead.txt b/test/yarp/fixtures/whitequark/bug_cmd_string_lookahead.txt
new file mode 100644
index 0000000000..7e9e54c518
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_cmd_string_lookahead.txt
@@ -0,0 +1 @@
+desc "foo" do end
diff --git a/test/yarp/fixtures/whitequark/bug_cmdarg.txt b/test/yarp/fixtures/whitequark/bug_cmdarg.txt
new file mode 100644
index 0000000000..0281cd6668
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_cmdarg.txt
@@ -0,0 +1,5 @@
+assert do: true
+
+assert dogs
+
+f x: -> do meth do end end
diff --git a/test/yarp/fixtures/whitequark/bug_def_no_paren_eql_begin.txt b/test/yarp/fixtures/whitequark/bug_def_no_paren_eql_begin.txt
new file mode 100644
index 0000000000..615dc88217
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_def_no_paren_eql_begin.txt
@@ -0,0 +1,4 @@
+def foo
+=begin
+=end
+end
diff --git a/test/yarp/fixtures/whitequark/bug_do_block_in_call_args.txt b/test/yarp/fixtures/whitequark/bug_do_block_in_call_args.txt
new file mode 100644
index 0000000000..21340fd6e8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_do_block_in_call_args.txt
@@ -0,0 +1 @@
+bar def foo; self.each do end end
diff --git a/test/yarp/fixtures/whitequark/bug_do_block_in_cmdarg.txt b/test/yarp/fixtures/whitequark/bug_do_block_in_cmdarg.txt
new file mode 100644
index 0000000000..7dece50408
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_do_block_in_cmdarg.txt
@@ -0,0 +1 @@
+tap (proc do end)
diff --git a/test/yarp/fixtures/whitequark/bug_do_block_in_hash_brace.txt b/test/yarp/fixtures/whitequark/bug_do_block_in_hash_brace.txt
new file mode 100644
index 0000000000..6c4dd205d2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_do_block_in_hash_brace.txt
@@ -0,0 +1,9 @@
+p :foo, {"a": proc do end, b: proc do end}
+
+p :foo, {** proc do end, b: proc do end}
+
+p :foo, {:a => proc do end, b: proc do end}
+
+p :foo, {a: proc do end, b: proc do end}
+
+p :foo, {proc do end => proc do end, b: proc do end}
diff --git a/test/yarp/fixtures/whitequark/bug_heredoc_do.txt b/test/yarp/fixtures/whitequark/bug_heredoc_do.txt
new file mode 100644
index 0000000000..06fef0a99f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_heredoc_do.txt
@@ -0,0 +1,3 @@
+f <<-TABLE do
+TABLE
+end
diff --git a/test/yarp/fixtures/whitequark/bug_interp_single.txt b/test/yarp/fixtures/whitequark/bug_interp_single.txt
new file mode 100644
index 0000000000..be0b1a8542
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_interp_single.txt
@@ -0,0 +1,3 @@
+"#{1}"
+
+%W"#{1}"
diff --git a/test/yarp/fixtures/whitequark/bug_lambda_leakage.txt b/test/yarp/fixtures/whitequark/bug_lambda_leakage.txt
new file mode 100644
index 0000000000..372b36929a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_lambda_leakage.txt
@@ -0,0 +1 @@
+->(scope) {}; scope
diff --git a/test/yarp/fixtures/whitequark/bug_regex_verification.txt b/test/yarp/fixtures/whitequark/bug_regex_verification.txt
new file mode 100644
index 0000000000..f8483c8b10
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_regex_verification.txt
@@ -0,0 +1 @@
+/#)/x
diff --git a/test/yarp/fixtures/whitequark/bug_rescue_empty_else.txt b/test/yarp/fixtures/whitequark/bug_rescue_empty_else.txt
new file mode 100644
index 0000000000..e8c81edc57
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_rescue_empty_else.txt
@@ -0,0 +1 @@
+begin; rescue LoadError; else; end
diff --git a/test/yarp/fixtures/whitequark/bug_while_not_parens_do.txt b/test/yarp/fixtures/whitequark/bug_while_not_parens_do.txt
new file mode 100644
index 0000000000..628c36ef13
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/bug_while_not_parens_do.txt
@@ -0,0 +1 @@
+while not (true) do end
diff --git a/test/yarp/fixtures/whitequark/case_cond.txt b/test/yarp/fixtures/whitequark/case_cond.txt
new file mode 100644
index 0000000000..a236b27ebd
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/case_cond.txt
@@ -0,0 +1 @@
+case; when foo; 'foo'; end
diff --git a/test/yarp/fixtures/whitequark/case_cond_else.txt b/test/yarp/fixtures/whitequark/case_cond_else.txt
new file mode 100644
index 0000000000..06eefa4a1b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/case_cond_else.txt
@@ -0,0 +1 @@
+case; when foo; 'foo'; else 'bar'; end
diff --git a/test/yarp/fixtures/whitequark/case_expr.txt b/test/yarp/fixtures/whitequark/case_expr.txt
new file mode 100644
index 0000000000..472672c781
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/case_expr.txt
@@ -0,0 +1 @@
+case foo; when 'bar'; bar; end
diff --git a/test/yarp/fixtures/whitequark/case_expr_else.txt b/test/yarp/fixtures/whitequark/case_expr_else.txt
new file mode 100644
index 0000000000..3c55826134
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/case_expr_else.txt
@@ -0,0 +1 @@
+case foo; when 'bar'; bar; else baz; end
diff --git a/test/yarp/fixtures/whitequark/casgn_scoped.txt b/test/yarp/fixtures/whitequark/casgn_scoped.txt
new file mode 100644
index 0000000000..964d0f4c9b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/casgn_scoped.txt
@@ -0,0 +1 @@
+Bar::Foo = 10
diff --git a/test/yarp/fixtures/whitequark/casgn_toplevel.txt b/test/yarp/fixtures/whitequark/casgn_toplevel.txt
new file mode 100644
index 0000000000..047a3b6745
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/casgn_toplevel.txt
@@ -0,0 +1 @@
+::Foo = 10
diff --git a/test/yarp/fixtures/whitequark/casgn_unscoped.txt b/test/yarp/fixtures/whitequark/casgn_unscoped.txt
new file mode 100644
index 0000000000..5632cf64ee
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/casgn_unscoped.txt
@@ -0,0 +1 @@
+Foo = 10
diff --git a/test/yarp/fixtures/whitequark/character.txt b/test/yarp/fixtures/whitequark/character.txt
new file mode 100644
index 0000000000..b22ffbb71a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/character.txt
@@ -0,0 +1 @@
+?a
diff --git a/test/yarp/fixtures/whitequark/class.txt b/test/yarp/fixtures/whitequark/class.txt
new file mode 100644
index 0000000000..a30a248e96
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/class.txt
@@ -0,0 +1,3 @@
+class Foo end
+
+class Foo; end
diff --git a/test/yarp/fixtures/whitequark/class_definition_in_while_cond.txt b/test/yarp/fixtures/whitequark/class_definition_in_while_cond.txt
new file mode 100644
index 0000000000..10427314b5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/class_definition_in_while_cond.txt
@@ -0,0 +1,7 @@
+while class << self; a = tap do end; end; break; end
+
+while class << self; tap do end; end; break; end
+
+while class Foo a = tap do end; end; break; end
+
+while class Foo; tap do end; end; break; end
diff --git a/test/yarp/fixtures/whitequark/class_super.txt b/test/yarp/fixtures/whitequark/class_super.txt
new file mode 100644
index 0000000000..8829d82d36
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/class_super.txt
@@ -0,0 +1 @@
+class Foo < Bar; end
diff --git a/test/yarp/fixtures/whitequark/class_super_label.txt b/test/yarp/fixtures/whitequark/class_super_label.txt
new file mode 100644
index 0000000000..5d47897ab6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/class_super_label.txt
@@ -0,0 +1 @@
+class Foo < a:b; end
diff --git a/test/yarp/fixtures/whitequark/comments_before_leading_dot__27.txt b/test/yarp/fixtures/whitequark/comments_before_leading_dot__27.txt
new file mode 100644
index 0000000000..208f2d87fe
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/comments_before_leading_dot__27.txt
@@ -0,0 +1,19 @@
+a #
+  #
+&.foo
+
+
+a #
+  #
+.foo
+
+
+a #
+#
+&.foo
+
+
+a #
+#
+.foo
+
diff --git a/test/yarp/fixtures/whitequark/complex.txt b/test/yarp/fixtures/whitequark/complex.txt
new file mode 100644
index 0000000000..1dbf2c13f4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/complex.txt
@@ -0,0 +1,7 @@
+42.1i
+
+42.1ri
+
+42i
+
+42ri
diff --git a/test/yarp/fixtures/whitequark/cond_begin.txt b/test/yarp/fixtures/whitequark/cond_begin.txt
new file mode 100644
index 0000000000..49d709b79c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cond_begin.txt
@@ -0,0 +1 @@
+if (bar); foo; end
diff --git a/test/yarp/fixtures/whitequark/cond_begin_masgn.txt b/test/yarp/fixtures/whitequark/cond_begin_masgn.txt
new file mode 100644
index 0000000000..f9b65026b4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cond_begin_masgn.txt
@@ -0,0 +1 @@
+if (bar; a, b = foo); end
diff --git a/test/yarp/fixtures/whitequark/cond_eflipflop.txt b/test/yarp/fixtures/whitequark/cond_eflipflop.txt
new file mode 100644
index 0000000000..1236c2dbb5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cond_eflipflop.txt
@@ -0,0 +1,3 @@
+!(foo...bar)
+
+if foo...bar; end
diff --git a/test/yarp/fixtures/whitequark/cond_iflipflop.txt b/test/yarp/fixtures/whitequark/cond_iflipflop.txt
new file mode 100644
index 0000000000..84bee71a74
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cond_iflipflop.txt
@@ -0,0 +1,3 @@
+!(foo..bar)
+
+if foo..bar; end
diff --git a/test/yarp/fixtures/whitequark/cond_match_current_line.txt b/test/yarp/fixtures/whitequark/cond_match_current_line.txt
new file mode 100644
index 0000000000..21878c7bd8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cond_match_current_line.txt
@@ -0,0 +1,3 @@
+!/wat/
+
+if /wat/; end
diff --git a/test/yarp/fixtures/whitequark/const_op_asgn.txt b/test/yarp/fixtures/whitequark/const_op_asgn.txt
new file mode 100644
index 0000000000..e72e7adee8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/const_op_asgn.txt
@@ -0,0 +1,9 @@
+::A += 1
+
+A += 1
+
+B::A += 1
+
+def x; ::A ||= 1; end
+
+def x; self::A ||= 1; end
diff --git a/test/yarp/fixtures/whitequark/const_scoped.txt b/test/yarp/fixtures/whitequark/const_scoped.txt
new file mode 100644
index 0000000000..4b03d85fc0
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/const_scoped.txt
@@ -0,0 +1 @@
+Bar::Foo
diff --git a/test/yarp/fixtures/whitequark/const_toplevel.txt b/test/yarp/fixtures/whitequark/const_toplevel.txt
new file mode 100644
index 0000000000..f783ae752b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/const_toplevel.txt
@@ -0,0 +1 @@
+::Foo
diff --git a/test/yarp/fixtures/whitequark/const_unscoped.txt b/test/yarp/fixtures/whitequark/const_unscoped.txt
new file mode 100644
index 0000000000..bc56c4d894
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/const_unscoped.txt
@@ -0,0 +1 @@
+Foo
diff --git a/test/yarp/fixtures/whitequark/cpath.txt b/test/yarp/fixtures/whitequark/cpath.txt
new file mode 100644
index 0000000000..a4041692d1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cpath.txt
@@ -0,0 +1,3 @@
+module ::Foo; end
+
+module Bar::Foo; end
diff --git a/test/yarp/fixtures/whitequark/cvar.txt b/test/yarp/fixtures/whitequark/cvar.txt
new file mode 100644
index 0000000000..4997896e4a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cvar.txt
@@ -0,0 +1 @@
+@@foo
diff --git a/test/yarp/fixtures/whitequark/cvasgn.txt b/test/yarp/fixtures/whitequark/cvasgn.txt
new file mode 100644
index 0000000000..8f7e19c4fe
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/cvasgn.txt
@@ -0,0 +1 @@
+@@var = 10
diff --git a/test/yarp/fixtures/whitequark/dedenting_heredoc.txt b/test/yarp/fixtures/whitequark/dedenting_heredoc.txt
new file mode 100644
index 0000000000..2840ec3e1c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/dedenting_heredoc.txt
@@ -0,0 +1,75 @@
+p <<~"E"
+    x
+  #{"  y"}
+E
+
+p <<~"E"
+    x
+  #{foo}
+E
+
+p <<~E
+	x
+        y
+E
+
+p <<~E
+	x
+    y
+E
+
+p <<~E
+    	x
+        y
+E
+
+p <<~E
+        	x
+	y
+E
+
+p <<~E
+    x
+  \	y
+E
+
+p <<~E
+    x
+  \  y
+E
+
+p <<~E
+  E
+
+p <<~E
+  x
+
+y
+E
+
+p <<~E
+  x
+
+  y
+E
+
+p <<~E
+  x
+    y
+E
+
+p <<~E
+  x
+E
+
+p <<~E
+  ð
+E
+
+p <<~E
+E
+
+p <<~`E`
+    x
+  #{foo}
+E
diff --git a/test/yarp/fixtures/whitequark/dedenting_interpolating_heredoc_fake_line_continuation.txt b/test/yarp/fixtures/whitequark/dedenting_interpolating_heredoc_fake_line_continuation.txt
new file mode 100644
index 0000000000..0427715d61
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/dedenting_interpolating_heredoc_fake_line_continuation.txt
@@ -0,0 +1,4 @@
+<<~'FOO'
+  baz\\
+  qux
+FOO
diff --git a/test/yarp/fixtures/whitequark/dedenting_non_interpolating_heredoc_line_continuation.txt b/test/yarp/fixtures/whitequark/dedenting_non_interpolating_heredoc_line_continuation.txt
new file mode 100644
index 0000000000..fd7bc02419
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/dedenting_non_interpolating_heredoc_line_continuation.txt
@@ -0,0 +1,4 @@
+<<~'FOO'
+  baz\
+  qux
+FOO
diff --git a/test/yarp/fixtures/whitequark/def.txt b/test/yarp/fixtures/whitequark/def.txt
new file mode 100644
index 0000000000..d96a4238b3
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/def.txt
@@ -0,0 +1,11 @@
+def BEGIN; end
+
+def END; end
+
+def String; end
+
+def String=; end
+
+def foo; end
+
+def until; end
diff --git a/test/yarp/fixtures/whitequark/defined.txt b/test/yarp/fixtures/whitequark/defined.txt
new file mode 100644
index 0000000000..5cf93e22e3
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/defined.txt
@@ -0,0 +1,5 @@
+defined? @foo
+
+defined? foo
+
+defined?(foo)
diff --git a/test/yarp/fixtures/whitequark/defs.txt b/test/yarp/fixtures/whitequark/defs.txt
new file mode 100644
index 0000000000..e0b7aa86eb
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/defs.txt
@@ -0,0 +1,9 @@
+def (foo).foo; end
+
+def String.foo; end
+
+def String::foo; end
+
+def self.foo; end
+
+def self::foo; end
diff --git a/test/yarp/fixtures/whitequark/empty_stmt.txt b/test/yarp/fixtures/whitequark/empty_stmt.txt
new file mode 100644
index 0000000000..8b13789179
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/empty_stmt.txt
@@ -0,0 +1 @@
+
diff --git a/test/yarp/fixtures/whitequark/endless_comparison_method.txt b/test/yarp/fixtures/whitequark/endless_comparison_method.txt
new file mode 100644
index 0000000000..e10c3a6ced
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/endless_comparison_method.txt
@@ -0,0 +1,11 @@
+def !=(other) = do_something
+
+def !=(other) = do_something
+
+def <=(other) = do_something
+
+def ==(other) = do_something
+
+def ===(other) = do_something
+
+def >=(other) = do_something
diff --git a/test/yarp/fixtures/whitequark/endless_method.txt b/test/yarp/fixtures/whitequark/endless_method.txt
new file mode 100644
index 0000000000..7002526229
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/endless_method.txt
@@ -0,0 +1,7 @@
+def foo() = 42
+
+def inc(x) = x + 1
+
+def obj.foo() = 42
+
+def obj.inc(x) = x + 1
diff --git a/test/yarp/fixtures/whitequark/endless_method_command_syntax.txt b/test/yarp/fixtures/whitequark/endless_method_command_syntax.txt
new file mode 100644
index 0000000000..d9dad2d747
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/endless_method_command_syntax.txt
@@ -0,0 +1,15 @@
+def foo = puts "Hello"
+
+def foo() = puts "Hello"
+
+def foo(x) = puts x
+
+def obj.foo = puts "Hello"
+
+def obj.foo() = puts "Hello"
+
+def obj.foo(x) = puts x
+
+def rescued(x) = raise "to be caught" rescue "instance #{x}"
+
+def self.rescued(x) = raise "to be caught" rescue "class #{x}"
diff --git a/test/yarp/fixtures/whitequark/endless_method_forwarded_args_legacy.txt b/test/yarp/fixtures/whitequark/endless_method_forwarded_args_legacy.txt
new file mode 100644
index 0000000000..5955e40b5b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/endless_method_forwarded_args_legacy.txt
@@ -0,0 +1 @@
+def foo(...) = bar(...)
diff --git a/test/yarp/fixtures/whitequark/endless_method_with_rescue_mod.txt b/test/yarp/fixtures/whitequark/endless_method_with_rescue_mod.txt
new file mode 100644
index 0000000000..93dc63a45d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/endless_method_with_rescue_mod.txt
@@ -0,0 +1,3 @@
+def m() = 1 rescue 2
+
+def self.m() = 1 rescue 2
diff --git a/test/yarp/fixtures/whitequark/endless_method_without_args.txt b/test/yarp/fixtures/whitequark/endless_method_without_args.txt
new file mode 100644
index 0000000000..90ea8f7c6d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/endless_method_without_args.txt
@@ -0,0 +1,7 @@
+def foo = 42
+
+def foo = 42 rescue nil
+
+def self.foo = 42
+
+def self.foo = 42 rescue nil
diff --git a/test/yarp/fixtures/whitequark/ensure.txt b/test/yarp/fixtures/whitequark/ensure.txt
new file mode 100644
index 0000000000..6c4b47c63c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ensure.txt
@@ -0,0 +1 @@
+begin; meth; ensure; bar; end
diff --git a/test/yarp/fixtures/whitequark/ensure_empty.txt b/test/yarp/fixtures/whitequark/ensure_empty.txt
new file mode 100644
index 0000000000..39a175c371
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ensure_empty.txt
@@ -0,0 +1 @@
+begin ensure end
diff --git a/test/yarp/fixtures/whitequark/false.txt b/test/yarp/fixtures/whitequark/false.txt
new file mode 100644
index 0000000000..c508d5366f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/false.txt
@@ -0,0 +1 @@
+false
diff --git a/test/yarp/fixtures/whitequark/float.txt b/test/yarp/fixtures/whitequark/float.txt
new file mode 100644
index 0000000000..8c7592a192
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/float.txt
@@ -0,0 +1,3 @@
+-1.33
+
+1.33
diff --git a/test/yarp/fixtures/whitequark/for.txt b/test/yarp/fixtures/whitequark/for.txt
new file mode 100644
index 0000000000..a27ae578da
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/for.txt
@@ -0,0 +1,3 @@
+for a in foo do p a; end
+
+for a in foo; p a; end
diff --git a/test/yarp/fixtures/whitequark/for_mlhs.txt b/test/yarp/fixtures/whitequark/for_mlhs.txt
new file mode 100644
index 0000000000..53cd5229a4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/for_mlhs.txt
@@ -0,0 +1 @@
+for a, b in foo; p a, b; end
diff --git a/test/yarp/fixtures/whitequark/forward_arg.txt b/test/yarp/fixtures/whitequark/forward_arg.txt
new file mode 100644
index 0000000000..c7590a8d53
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forward_arg.txt
@@ -0,0 +1 @@
+def foo(...); bar(...); end
diff --git a/test/yarp/fixtures/whitequark/forward_arg_with_open_args.txt b/test/yarp/fixtures/whitequark/forward_arg_with_open_args.txt
new file mode 100644
index 0000000000..fd4c06bcb5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forward_arg_with_open_args.txt
@@ -0,0 +1,27 @@
+(def foo ...
+  bar(...)
+end)
+
+(def foo ...; bar(...); end)
+
+def foo ...
+end
+
+def foo ...; bar(...); end
+
+def foo a, ...
+  bar(...)
+end
+
+def foo a, ...; bar(...); end
+
+def foo a, b = 1, ...
+end
+
+def foo b = 1, ...
+  bar(...)
+end
+
+def foo b = 1, ...; bar(...); end
+
+def foo(a, ...) bar(...) end
diff --git a/test/yarp/fixtures/whitequark/forward_args_legacy.txt b/test/yarp/fixtures/whitequark/forward_args_legacy.txt
new file mode 100644
index 0000000000..0d9162457f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forward_args_legacy.txt
@@ -0,0 +1,5 @@
+def foo(...); bar(...); end
+
+def foo(...); end
+
+def foo(...); super(...); end
diff --git a/test/yarp/fixtures/whitequark/forwarded_argument_with_kwrestarg.txt b/test/yarp/fixtures/whitequark/forwarded_argument_with_kwrestarg.txt
new file mode 100644
index 0000000000..7dbf472232
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forwarded_argument_with_kwrestarg.txt
@@ -0,0 +1 @@
+def foo(argument, **); bar(argument, **); end
diff --git a/test/yarp/fixtures/whitequark/forwarded_argument_with_restarg.txt b/test/yarp/fixtures/whitequark/forwarded_argument_with_restarg.txt
new file mode 100644
index 0000000000..f734bfd9ec
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forwarded_argument_with_restarg.txt
@@ -0,0 +1 @@
+def foo(argument, *); bar(argument, *); end
diff --git a/test/yarp/fixtures/whitequark/forwarded_kwrestarg.txt b/test/yarp/fixtures/whitequark/forwarded_kwrestarg.txt
new file mode 100644
index 0000000000..16cd8b2913
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forwarded_kwrestarg.txt
@@ -0,0 +1 @@
+def foo(**); bar(**); end
diff --git a/test/yarp/fixtures/whitequark/forwarded_kwrestarg_with_additional_kwarg.txt b/test/yarp/fixtures/whitequark/forwarded_kwrestarg_with_additional_kwarg.txt
new file mode 100644
index 0000000000..52759b838f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forwarded_kwrestarg_with_additional_kwarg.txt
@@ -0,0 +1 @@
+def foo(**); bar(**, from_foo: true); end
diff --git a/test/yarp/fixtures/whitequark/forwarded_restarg.txt b/test/yarp/fixtures/whitequark/forwarded_restarg.txt
new file mode 100644
index 0000000000..65ac2cc1ed
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/forwarded_restarg.txt
@@ -0,0 +1 @@
+def foo(*); bar(*); end
diff --git a/test/yarp/fixtures/whitequark/gvar.txt b/test/yarp/fixtures/whitequark/gvar.txt
new file mode 100644
index 0000000000..bbf13489ad
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/gvar.txt
@@ -0,0 +1 @@
+$foo
diff --git a/test/yarp/fixtures/whitequark/gvasgn.txt b/test/yarp/fixtures/whitequark/gvasgn.txt
new file mode 100644
index 0000000000..2bcc22cdd1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/gvasgn.txt
@@ -0,0 +1 @@
+$var = 10
diff --git a/test/yarp/fixtures/whitequark/hash_empty.txt b/test/yarp/fixtures/whitequark/hash_empty.txt
new file mode 100644
index 0000000000..ffcd4415b0
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/hash_empty.txt
@@ -0,0 +1 @@
+{ }
diff --git a/test/yarp/fixtures/whitequark/hash_hashrocket.txt b/test/yarp/fixtures/whitequark/hash_hashrocket.txt
new file mode 100644
index 0000000000..2cbb3bd96d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/hash_hashrocket.txt
@@ -0,0 +1,3 @@
+{ 1 => 2 }
+
+{ 1 => 2, :foo => "bar" }
diff --git a/test/yarp/fixtures/whitequark/hash_kwsplat.txt b/test/yarp/fixtures/whitequark/hash_kwsplat.txt
new file mode 100644
index 0000000000..921aa97c7c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/hash_kwsplat.txt
@@ -0,0 +1 @@
+{ foo: 2, **bar }
diff --git a/test/yarp/fixtures/whitequark/hash_label.txt b/test/yarp/fixtures/whitequark/hash_label.txt
new file mode 100644
index 0000000000..3aacae4b69
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/hash_label.txt
@@ -0,0 +1 @@
+{ foo: 2 }
diff --git a/test/yarp/fixtures/whitequark/hash_label_end.txt b/test/yarp/fixtures/whitequark/hash_label_end.txt
new file mode 100644
index 0000000000..ac9f7c4b41
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/hash_label_end.txt
@@ -0,0 +1,5 @@
+f(a ? "a":1)
+
+{ 'foo': 2 }
+
+{ 'foo': 2, 'bar': {}}
diff --git a/test/yarp/fixtures/whitequark/hash_pair_value_omission.txt b/test/yarp/fixtures/whitequark/hash_pair_value_omission.txt
new file mode 100644
index 0000000000..9d8ccb5877
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/hash_pair_value_omission.txt
@@ -0,0 +1,5 @@
+{BAR:}
+
+{a:, b:}
+
+{puts:}
diff --git a/test/yarp/fixtures/whitequark/heredoc.txt b/test/yarp/fixtures/whitequark/heredoc.txt
new file mode 100644
index 0000000000..1bfc963f94
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/heredoc.txt
@@ -0,0 +1,14 @@
+<<'HERE'
+foo
+bar
+HERE
+
+<<HERE
+foo
+bar
+HERE
+
+<<`HERE`
+foo
+bar
+HERE
diff --git a/test/yarp/fixtures/whitequark/if.txt b/test/yarp/fixtures/whitequark/if.txt
new file mode 100644
index 0000000000..3de3525286
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if.txt
@@ -0,0 +1,3 @@
+if foo then bar; end
+
+if foo; bar; end
diff --git a/test/yarp/fixtures/whitequark/if_else.txt b/test/yarp/fixtures/whitequark/if_else.txt
new file mode 100644
index 0000000000..62bab8138c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if_else.txt
@@ -0,0 +1,3 @@
+if foo then bar; else baz; end
+
+if foo; bar; else baz; end
diff --git a/test/yarp/fixtures/whitequark/if_elsif.txt b/test/yarp/fixtures/whitequark/if_elsif.txt
new file mode 100644
index 0000000000..4d71e82214
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if_elsif.txt
@@ -0,0 +1 @@
+if foo; bar; elsif baz; 1; else 2; end
diff --git a/test/yarp/fixtures/whitequark/if_masgn__24.txt b/test/yarp/fixtures/whitequark/if_masgn__24.txt
new file mode 100644
index 0000000000..0c2c8bb04f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if_masgn__24.txt
@@ -0,0 +1 @@
+if (a, b = foo); end
diff --git a/test/yarp/fixtures/whitequark/if_mod.txt b/test/yarp/fixtures/whitequark/if_mod.txt
new file mode 100644
index 0000000000..da177b5606
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if_mod.txt
@@ -0,0 +1 @@
+bar if foo
diff --git a/test/yarp/fixtures/whitequark/if_nl_then.txt b/test/yarp/fixtures/whitequark/if_nl_then.txt
new file mode 100644
index 0000000000..b68107bad2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if_nl_then.txt
@@ -0,0 +1,2 @@
+if foo
+then bar end
diff --git a/test/yarp/fixtures/whitequark/if_while_after_class__since_32.txt b/test/yarp/fixtures/whitequark/if_while_after_class__since_32.txt
new file mode 100644
index 0000000000..1552494d28
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/if_while_after_class__since_32.txt
@@ -0,0 +1,7 @@
+class if true; Object end::Kernel; end
+
+class while true; break Object end::Kernel; end
+
+module if true; Object end::Kernel; end
+
+module while true; break Object end::Kernel; end
diff --git a/test/yarp/fixtures/whitequark/int.txt b/test/yarp/fixtures/whitequark/int.txt
new file mode 100644
index 0000000000..6d419918c6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/int.txt
@@ -0,0 +1,5 @@
++42
+
+-42
+
+42
diff --git a/test/yarp/fixtures/whitequark/int___LINE__.txt b/test/yarp/fixtures/whitequark/int___LINE__.txt
new file mode 100644
index 0000000000..05dcf7afe0
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/int___LINE__.txt
@@ -0,0 +1 @@
+__LINE__
diff --git a/test/yarp/fixtures/whitequark/interp_digit_var.txt b/test/yarp/fixtures/whitequark/interp_digit_var.txt
new file mode 100644
index 0000000000..37487ddbaf
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/interp_digit_var.txt
@@ -0,0 +1,87 @@
+ "#@1"
+
+ "#@@1"
+
+ %I[#@1]
+
+ %I[#@@1]
+
+ %Q{#@1}
+
+ %Q{#@@1}
+
+ %W[#@1]
+
+ %W[#@@1]
+
+ %i[ #@1 ]
+
+ %i[ #@@1 ]
+
+ %q{#@1}
+
+ %q{#@@1}
+
+ %r{#@1}
+
+ %r{#@@1}
+
+ %s{#@1}
+
+ %s{#@@1}
+
+ %w[ #@1 ]
+
+ %w[ #@@1 ]
+
+ %x{#@1}
+
+ %x{#@@1}
+
+ %{#@1}
+
+ %{#@@1}
+
+ '#@1'
+
+ '#@@1'
+
+ /#@1/
+
+ /#@@1/
+
+ :"#@1"
+
+ :"#@@1"
+
+ :'#@1'
+
+ :'#@@1'
+
+ `#@1`
+
+ `#@@1`
+
+<<-"HERE"
+#@1
+HERE
+
+<<-"HERE"
+#@@1
+HERE
+
+<<-'HERE'
+#@1
+HERE
+
+<<-'HERE'
+#@@1
+HERE
+
+<<-`HERE`
+#@1
+HERE
+
+<<-`HERE`
+#@@1
+HERE
diff --git a/test/yarp/fixtures/whitequark/ivar.txt b/test/yarp/fixtures/whitequark/ivar.txt
new file mode 100644
index 0000000000..9149fc67f9
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ivar.txt
@@ -0,0 +1 @@
+@foo
diff --git a/test/yarp/fixtures/whitequark/ivasgn.txt b/test/yarp/fixtures/whitequark/ivasgn.txt
new file mode 100644
index 0000000000..ac291799db
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ivasgn.txt
@@ -0,0 +1 @@
+@var = 10
diff --git a/test/yarp/fixtures/whitequark/keyword_argument_omission.txt b/test/yarp/fixtures/whitequark/keyword_argument_omission.txt
new file mode 100644
index 0000000000..47883dc9a5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/keyword_argument_omission.txt
@@ -0,0 +1 @@
+foo(a:, b:)
diff --git a/test/yarp/fixtures/whitequark/kwarg.txt b/test/yarp/fixtures/whitequark/kwarg.txt
new file mode 100644
index 0000000000..ca02a1fd2a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwarg.txt
@@ -0,0 +1 @@
+def f(foo:); end
diff --git a/test/yarp/fixtures/whitequark/kwbegin_compstmt.txt b/test/yarp/fixtures/whitequark/kwbegin_compstmt.txt
new file mode 100644
index 0000000000..33ceff2489
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwbegin_compstmt.txt
@@ -0,0 +1 @@
+begin foo!; bar! end
diff --git a/test/yarp/fixtures/whitequark/kwnilarg.txt b/test/yarp/fixtures/whitequark/kwnilarg.txt
new file mode 100644
index 0000000000..8fc482d5af
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwnilarg.txt
@@ -0,0 +1,5 @@
+->(**nil) {}
+
+def f(**nil); end
+
+m { |**nil| }
diff --git a/test/yarp/fixtures/whitequark/kwoptarg.txt b/test/yarp/fixtures/whitequark/kwoptarg.txt
new file mode 100644
index 0000000000..dc3ce728d6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwoptarg.txt
@@ -0,0 +1 @@
+def f(foo: 1); end
diff --git a/test/yarp/fixtures/whitequark/kwoptarg_with_kwrestarg_and_forwarded_args.txt b/test/yarp/fixtures/whitequark/kwoptarg_with_kwrestarg_and_forwarded_args.txt
new file mode 100644
index 0000000000..99dcc7239b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwoptarg_with_kwrestarg_and_forwarded_args.txt
@@ -0,0 +1 @@
+def f(a: nil, **); b(**) end
diff --git a/test/yarp/fixtures/whitequark/kwrestarg_named.txt b/test/yarp/fixtures/whitequark/kwrestarg_named.txt
new file mode 100644
index 0000000000..e17a661001
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwrestarg_named.txt
@@ -0,0 +1 @@
+def f(**foo); end
diff --git a/test/yarp/fixtures/whitequark/kwrestarg_unnamed.txt b/test/yarp/fixtures/whitequark/kwrestarg_unnamed.txt
new file mode 100644
index 0000000000..1b26b1d2ac
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/kwrestarg_unnamed.txt
@@ -0,0 +1 @@
+def f(**); end
diff --git a/test/yarp/fixtures/whitequark/lbrace_arg_after_command_args.txt b/test/yarp/fixtures/whitequark/lbrace_arg_after_command_args.txt
new file mode 100644
index 0000000000..277c200c9f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/lbrace_arg_after_command_args.txt
@@ -0,0 +1 @@
+let (:a) { m do; end }
diff --git a/test/yarp/fixtures/whitequark/lparenarg_after_lvar__since_25.txt b/test/yarp/fixtures/whitequark/lparenarg_after_lvar__since_25.txt
new file mode 100644
index 0000000000..dc3a98b1c8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/lparenarg_after_lvar__since_25.txt
@@ -0,0 +1,3 @@
+foo (-1.3).abs
+
+meth (-1.3).abs
diff --git a/test/yarp/fixtures/whitequark/lvar.txt b/test/yarp/fixtures/whitequark/lvar.txt
new file mode 100644
index 0000000000..257cc5642c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/lvar.txt
@@ -0,0 +1 @@
+foo
diff --git a/test/yarp/fixtures/whitequark/lvar_injecting_match.txt b/test/yarp/fixtures/whitequark/lvar_injecting_match.txt
new file mode 100644
index 0000000000..ba814a1088
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/lvar_injecting_match.txt
@@ -0,0 +1 @@
+/(?<match>bar)/ =~ 'bar'; match
diff --git a/test/yarp/fixtures/whitequark/lvasgn.txt b/test/yarp/fixtures/whitequark/lvasgn.txt
new file mode 100644
index 0000000000..330b8eff27
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/lvasgn.txt
@@ -0,0 +1 @@
+var = 10; var
diff --git a/test/yarp/fixtures/whitequark/masgn.txt b/test/yarp/fixtures/whitequark/masgn.txt
new file mode 100644
index 0000000000..032124287c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/masgn.txt
@@ -0,0 +1,5 @@
+(foo, bar) = 1, 2
+
+foo, bar = 1, 2
+
+foo, bar, baz = 1, 2
diff --git a/test/yarp/fixtures/whitequark/masgn_attr.txt b/test/yarp/fixtures/whitequark/masgn_attr.txt
new file mode 100644
index 0000000000..91a703ef44
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/masgn_attr.txt
@@ -0,0 +1,5 @@
+self.A, foo = foo
+
+self.a, self[1, 2] = foo
+
+self::a, foo = foo
diff --git a/test/yarp/fixtures/whitequark/masgn_cmd.txt b/test/yarp/fixtures/whitequark/masgn_cmd.txt
new file mode 100644
index 0000000000..18e096f1ee
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/masgn_cmd.txt
@@ -0,0 +1 @@
+foo, bar = m foo
diff --git a/test/yarp/fixtures/whitequark/masgn_const.txt b/test/yarp/fixtures/whitequark/masgn_const.txt
new file mode 100644
index 0000000000..3b6fba588a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/masgn_const.txt
@@ -0,0 +1,3 @@
+::A, foo = foo
+
+self::A, foo = foo
diff --git a/test/yarp/fixtures/whitequark/masgn_nested.txt b/test/yarp/fixtures/whitequark/masgn_nested.txt
new file mode 100644
index 0000000000..a1ccf4e385
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/masgn_nested.txt
@@ -0,0 +1,3 @@
+((b, )) = foo
+
+a, (b, c) = foo
diff --git a/test/yarp/fixtures/whitequark/masgn_splat.txt b/test/yarp/fixtures/whitequark/masgn_splat.txt
new file mode 100644
index 0000000000..a15dab10f2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/masgn_splat.txt
@@ -0,0 +1,19 @@
+* = bar
+
+*, c, d = bar
+
+*b = bar
+
+*b, c = bar
+
+@foo, @@bar = *foo
+
+a, * = bar
+
+a, *, c = bar
+
+a, *b = bar
+
+a, *b, c = bar
+
+a, b = *foo, bar
diff --git a/test/yarp/fixtures/whitequark/method_definition_in_while_cond.txt b/test/yarp/fixtures/whitequark/method_definition_in_while_cond.txt
new file mode 100644
index 0000000000..6ec38906a1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/method_definition_in_while_cond.txt
@@ -0,0 +1,7 @@
+while def foo a = tap do end; end; break; end
+
+while def foo; tap do end; end; break; end
+
+while def self.foo a = tap do end; end; break; end
+
+while def self.foo; tap do end; end; break; end
diff --git a/test/yarp/fixtures/whitequark/module.txt b/test/yarp/fixtures/whitequark/module.txt
new file mode 100644
index 0000000000..f999df3791
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/module.txt
@@ -0,0 +1 @@
+module Foo; end
diff --git a/test/yarp/fixtures/whitequark/multiple_pattern_matches.txt b/test/yarp/fixtures/whitequark/multiple_pattern_matches.txt
new file mode 100644
index 0000000000..54a4bb4774
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/multiple_pattern_matches.txt
@@ -0,0 +1,5 @@
+{a: 0} => a:
+{a: 0} => a:
+
+{a: 0} in a:
+{a: 0} in a:
diff --git a/test/yarp/fixtures/whitequark/newline_in_hash_argument.txt b/test/yarp/fixtures/whitequark/newline_in_hash_argument.txt
new file mode 100644
index 0000000000..1681844331
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/newline_in_hash_argument.txt
@@ -0,0 +1,14 @@
+case foo
+in a:
+0
+true
+in "b":
+0
+true
+end
+
+obj.set "foo":
+1
+
+obj.set foo:
+1
diff --git a/test/yarp/fixtures/whitequark/next.txt b/test/yarp/fixtures/whitequark/next.txt
new file mode 100644
index 0000000000..7556ac2b74
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/next.txt
@@ -0,0 +1,7 @@
+next
+
+next foo
+
+next()
+
+next(foo)
diff --git a/test/yarp/fixtures/whitequark/next_block.txt b/test/yarp/fixtures/whitequark/next_block.txt
new file mode 100644
index 0000000000..d3b51dfa21
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/next_block.txt
@@ -0,0 +1 @@
+next fun foo do end
diff --git a/test/yarp/fixtures/whitequark/nil.txt b/test/yarp/fixtures/whitequark/nil.txt
new file mode 100644
index 0000000000..607602cfc6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/nil.txt
@@ -0,0 +1 @@
+nil
diff --git a/test/yarp/fixtures/whitequark/nil_expression.txt b/test/yarp/fixtures/whitequark/nil_expression.txt
new file mode 100644
index 0000000000..aabf53f005
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/nil_expression.txt
@@ -0,0 +1,3 @@
+()
+
+begin end
diff --git a/test/yarp/fixtures/whitequark/non_lvar_injecting_match.txt b/test/yarp/fixtures/whitequark/non_lvar_injecting_match.txt
new file mode 100644
index 0000000000..f1eb7d3c2c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/non_lvar_injecting_match.txt
@@ -0,0 +1 @@
+/#{1}(?<match>bar)/ =~ 'bar'
diff --git a/test/yarp/fixtures/whitequark/not.txt b/test/yarp/fixtures/whitequark/not.txt
new file mode 100644
index 0000000000..d87f68f48c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/not.txt
@@ -0,0 +1,5 @@
+not foo
+
+not()
+
+not(foo)
diff --git a/test/yarp/fixtures/whitequark/not_cmd.txt b/test/yarp/fixtures/whitequark/not_cmd.txt
new file mode 100644
index 0000000000..685ec209ee
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/not_cmd.txt
@@ -0,0 +1 @@
+not m foo
diff --git a/test/yarp/fixtures/whitequark/not_masgn__24.txt b/test/yarp/fixtures/whitequark/not_masgn__24.txt
new file mode 100644
index 0000000000..cb93b9103d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/not_masgn__24.txt
@@ -0,0 +1 @@
+!(a, b = foo)
diff --git a/test/yarp/fixtures/whitequark/nth_ref.txt b/test/yarp/fixtures/whitequark/nth_ref.txt
new file mode 100644
index 0000000000..16ef65b105
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/nth_ref.txt
@@ -0,0 +1 @@
+$10
diff --git a/test/yarp/fixtures/whitequark/numbered_args_after_27.txt b/test/yarp/fixtures/whitequark/numbered_args_after_27.txt
new file mode 100644
index 0000000000..96fe7a32e2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/numbered_args_after_27.txt
@@ -0,0 +1,7 @@
+-> do _1 + _9 end
+
+-> { _1 + _9}
+
+m do _1 + _9 end
+
+m { _1 + _9 }
diff --git a/test/yarp/fixtures/whitequark/numparam_outside_block.txt b/test/yarp/fixtures/whitequark/numparam_outside_block.txt
new file mode 100644
index 0000000000..37cbce182d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/numparam_outside_block.txt
@@ -0,0 +1,9 @@
+_1
+
+class << foo; _1; end
+
+class A; _1; end
+
+def self.m; _1; end
+
+module A; _1; end
diff --git a/test/yarp/fixtures/whitequark/op_asgn.txt b/test/yarp/fixtures/whitequark/op_asgn.txt
new file mode 100644
index 0000000000..a5a28b1010
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/op_asgn.txt
@@ -0,0 +1,5 @@
+foo.A += 1
+
+foo.a += 1
+
+foo::a += 1
diff --git a/test/yarp/fixtures/whitequark/op_asgn_cmd.txt b/test/yarp/fixtures/whitequark/op_asgn_cmd.txt
new file mode 100644
index 0000000000..017aa9bef7
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/op_asgn_cmd.txt
@@ -0,0 +1,7 @@
+foo.A += m foo
+
+foo.a += m foo
+
+foo::A += m foo
+
+foo::a += m foo
diff --git a/test/yarp/fixtures/whitequark/op_asgn_index.txt b/test/yarp/fixtures/whitequark/op_asgn_index.txt
new file mode 100644
index 0000000000..92cfb225fc
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/op_asgn_index.txt
@@ -0,0 +1 @@
+foo[0, 1] += 2
diff --git a/test/yarp/fixtures/whitequark/op_asgn_index_cmd.txt b/test/yarp/fixtures/whitequark/op_asgn_index_cmd.txt
new file mode 100644
index 0000000000..161b244bd4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/op_asgn_index_cmd.txt
@@ -0,0 +1 @@
+foo[0, 1] += m foo
diff --git a/test/yarp/fixtures/whitequark/optarg.txt b/test/yarp/fixtures/whitequark/optarg.txt
new file mode 100644
index 0000000000..9d60609961
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/optarg.txt
@@ -0,0 +1,3 @@
+def f foo = 1; end
+
+def f(foo=1, bar=2); end
diff --git a/test/yarp/fixtures/whitequark/or.txt b/test/yarp/fixtures/whitequark/or.txt
new file mode 100644
index 0000000000..c2042ebb41
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/or.txt
@@ -0,0 +1,3 @@
+foo or bar
+
+foo || bar
diff --git a/test/yarp/fixtures/whitequark/or_asgn.txt b/test/yarp/fixtures/whitequark/or_asgn.txt
new file mode 100644
index 0000000000..6e4ecc9f93
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/or_asgn.txt
@@ -0,0 +1,3 @@
+foo.a ||= 1
+
+foo[0, 1] ||= 2
diff --git a/test/yarp/fixtures/whitequark/parser_bug_272.txt b/test/yarp/fixtures/whitequark/parser_bug_272.txt
new file mode 100644
index 0000000000..2f2f2b84d2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_272.txt
@@ -0,0 +1 @@
+a @b do |c|;end
diff --git a/test/yarp/fixtures/whitequark/parser_bug_490.txt b/test/yarp/fixtures/whitequark/parser_bug_490.txt
new file mode 100644
index 0000000000..cf544b1ff6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_490.txt
@@ -0,0 +1,5 @@
+def m; class << self; A = nil; end; end
+
+def m; class << self; class C; end; end; end
+
+def m; class << self; module M; end; end; end
diff --git a/test/yarp/fixtures/whitequark/parser_bug_507.txt b/test/yarp/fixtures/whitequark/parser_bug_507.txt
new file mode 100644
index 0000000000..bf616b85c8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_507.txt
@@ -0,0 +1 @@
+m = -> *args do end
diff --git a/test/yarp/fixtures/whitequark/parser_bug_518.txt b/test/yarp/fixtures/whitequark/parser_bug_518.txt
new file mode 100644
index 0000000000..22f4afe3c8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_518.txt
@@ -0,0 +1,2 @@
+class A < B
+end
diff --git a/test/yarp/fixtures/whitequark/parser_bug_525.txt b/test/yarp/fixtures/whitequark/parser_bug_525.txt
new file mode 100644
index 0000000000..59d0e735b4
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_525.txt
@@ -0,0 +1 @@
+m1 :k => m2 do; m3() do end; end
diff --git a/test/yarp/fixtures/whitequark/parser_bug_604.txt b/test/yarp/fixtures/whitequark/parser_bug_604.txt
new file mode 100644
index 0000000000..7eb91c2f46
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_604.txt
@@ -0,0 +1 @@
+m a + b do end
diff --git a/test/yarp/fixtures/whitequark/parser_bug_640.txt b/test/yarp/fixtures/whitequark/parser_bug_640.txt
new file mode 100644
index 0000000000..fb62ded04c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_640.txt
@@ -0,0 +1,4 @@
+<<~FOO
+  baz\
+  qux
+FOO
diff --git a/test/yarp/fixtures/whitequark/parser_bug_645.txt b/test/yarp/fixtures/whitequark/parser_bug_645.txt
new file mode 100644
index 0000000000..cb1e5a0dcf
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_645.txt
@@ -0,0 +1 @@
+-> (arg={}) {}
diff --git a/test/yarp/fixtures/whitequark/parser_bug_830.txt b/test/yarp/fixtures/whitequark/parser_bug_830.txt
new file mode 100644
index 0000000000..e5865e960d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_bug_830.txt
@@ -0,0 +1 @@
+/\(/
diff --git a/test/yarp/fixtures/whitequark/parser_drops_truncated_parts_of_squiggly_heredoc.txt b/test/yarp/fixtures/whitequark/parser_drops_truncated_parts_of_squiggly_heredoc.txt
new file mode 100644
index 0000000000..bddae8e153
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_drops_truncated_parts_of_squiggly_heredoc.txt
@@ -0,0 +1,3 @@
+<<~HERE
+  #{}
+HERE
diff --git a/test/yarp/fixtures/whitequark/parser_slash_slash_n_escaping_in_literals.txt b/test/yarp/fixtures/whitequark/parser_slash_slash_n_escaping_in_literals.txt
new file mode 100644
index 0000000000..564cebdd74
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/parser_slash_slash_n_escaping_in_literals.txt
@@ -0,0 +1,62 @@
+"a\
+b"
+
+%I{a\
+b}
+
+%Q{a\
+b}
+
+%W{a\
+b}
+
+%i{a\
+b}
+
+%q{a\
+b}
+
+%r{a\
+b}
+
+%s{a\
+b}
+
+%w{a\
+b}
+
+%x{a\
+b}
+
+%{a\
+b}
+
+'a\
+b'
+
+/a\
+b/
+
+:"a\
+b"
+
+:'a\
+b'
+
+<<-"HERE"
+a\
+b
+HERE
+
+<<-'HERE'
+a\
+b
+HERE
+
+<<-`HERE`
+a\
+b
+HERE
+
+`a\
+b`
diff --git a/test/yarp/fixtures/whitequark/pattern_matching__FILE__LINE_literals.txt b/test/yarp/fixtures/whitequark/pattern_matching__FILE__LINE_literals.txt
new file mode 100644
index 0000000000..fe0edaed55
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/pattern_matching__FILE__LINE_literals.txt
@@ -0,0 +1,4 @@
+        case [__FILE__, __LINE__ + 1, __ENCODING__]
+          in [__FILE__, __LINE__, __ENCODING__]
+        end
+
diff --git a/test/yarp/fixtures/whitequark/pattern_matching_blank_else.txt b/test/yarp/fixtures/whitequark/pattern_matching_blank_else.txt
new file mode 100644
index 0000000000..6bf059af41
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/pattern_matching_blank_else.txt
@@ -0,0 +1 @@
+case 1; in 2; 3; else; end
diff --git a/test/yarp/fixtures/whitequark/pattern_matching_else.txt b/test/yarp/fixtures/whitequark/pattern_matching_else.txt
new file mode 100644
index 0000000000..29f14c91ab
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/pattern_matching_else.txt
@@ -0,0 +1 @@
+case 1; in 2; 3; else; 4; end
diff --git a/test/yarp/fixtures/whitequark/pattern_matching_single_line.txt b/test/yarp/fixtures/whitequark/pattern_matching_single_line.txt
new file mode 100644
index 0000000000..12279afa24
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/pattern_matching_single_line.txt
@@ -0,0 +1,3 @@
+1 => [a]; a
+
+1 in [a]; a
diff --git a/test/yarp/fixtures/whitequark/pattern_matching_single_line_allowed_omission_of_parentheses.txt b/test/yarp/fixtures/whitequark/pattern_matching_single_line_allowed_omission_of_parentheses.txt
new file mode 100644
index 0000000000..1e429335d0
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/pattern_matching_single_line_allowed_omission_of_parentheses.txt
@@ -0,0 +1,11 @@
+[1, 2] => a, b; a
+
+[1, 2] in a, b; a
+
+{a: 1} => a:; a
+
+{a: 1} in a:; a
+
+{key: :value} => key: value; value
+
+{key: :value} in key: value; value
diff --git a/test/yarp/fixtures/whitequark/postexe.txt b/test/yarp/fixtures/whitequark/postexe.txt
new file mode 100644
index 0000000000..baee33af66
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/postexe.txt
@@ -0,0 +1 @@
+END { 1 }
diff --git a/test/yarp/fixtures/whitequark/preexe.txt b/test/yarp/fixtures/whitequark/preexe.txt
new file mode 100644
index 0000000000..9e802f3f4e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/preexe.txt
@@ -0,0 +1 @@
+BEGIN { 1 }
diff --git a/test/yarp/fixtures/whitequark/procarg0.txt b/test/yarp/fixtures/whitequark/procarg0.txt
new file mode 100644
index 0000000000..70b368e7d5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/procarg0.txt
@@ -0,0 +1,3 @@
+m { |(foo, bar)| }
+
+m { |foo| }
diff --git a/test/yarp/fixtures/whitequark/range_exclusive.txt b/test/yarp/fixtures/whitequark/range_exclusive.txt
new file mode 100644
index 0000000000..9e07faed27
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/range_exclusive.txt
@@ -0,0 +1 @@
+1...2
diff --git a/test/yarp/fixtures/whitequark/range_inclusive.txt b/test/yarp/fixtures/whitequark/range_inclusive.txt
new file mode 100644
index 0000000000..8c12abf7de
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/range_inclusive.txt
@@ -0,0 +1 @@
+1..2
diff --git a/test/yarp/fixtures/whitequark/rational.txt b/test/yarp/fixtures/whitequark/rational.txt
new file mode 100644
index 0000000000..e11cacc742
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rational.txt
@@ -0,0 +1,3 @@
+42.1r
+
+42r
diff --git a/test/yarp/fixtures/whitequark/redo.txt b/test/yarp/fixtures/whitequark/redo.txt
new file mode 100644
index 0000000000..f49789cbab
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/redo.txt
@@ -0,0 +1 @@
+redo
diff --git a/test/yarp/fixtures/whitequark/regex_interp.txt b/test/yarp/fixtures/whitequark/regex_interp.txt
new file mode 100644
index 0000000000..f9ad7fcbc8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/regex_interp.txt
@@ -0,0 +1 @@
+/foo#{bar}baz/
diff --git a/test/yarp/fixtures/whitequark/regex_plain.txt b/test/yarp/fixtures/whitequark/regex_plain.txt
new file mode 100644
index 0000000000..b86faecf98
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/regex_plain.txt
@@ -0,0 +1 @@
+/source/im
diff --git a/test/yarp/fixtures/whitequark/resbody_list.txt b/test/yarp/fixtures/whitequark/resbody_list.txt
new file mode 100644
index 0000000000..e40d45fc45
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/resbody_list.txt
@@ -0,0 +1 @@
+begin; meth; rescue Exception; bar; end
diff --git a/test/yarp/fixtures/whitequark/resbody_list_mrhs.txt b/test/yarp/fixtures/whitequark/resbody_list_mrhs.txt
new file mode 100644
index 0000000000..92b8bb2c02
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/resbody_list_mrhs.txt
@@ -0,0 +1 @@
+begin; meth; rescue Exception, foo; bar; end
diff --git a/test/yarp/fixtures/whitequark/resbody_list_var.txt b/test/yarp/fixtures/whitequark/resbody_list_var.txt
new file mode 100644
index 0000000000..0a2fb90b6d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/resbody_list_var.txt
@@ -0,0 +1 @@
+begin; meth; rescue foo => ex; bar; end
diff --git a/test/yarp/fixtures/whitequark/resbody_var.txt b/test/yarp/fixtures/whitequark/resbody_var.txt
new file mode 100644
index 0000000000..2104ac58e7
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/resbody_var.txt
@@ -0,0 +1,3 @@
+begin; meth; rescue => @ex; bar; end
+
+begin; meth; rescue => ex; bar; end
diff --git a/test/yarp/fixtures/whitequark/rescue.txt b/test/yarp/fixtures/whitequark/rescue.txt
new file mode 100644
index 0000000000..2d3be9dc56
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue.txt
@@ -0,0 +1 @@
+begin; meth; rescue; foo; end
diff --git a/test/yarp/fixtures/whitequark/rescue_else.txt b/test/yarp/fixtures/whitequark/rescue_else.txt
new file mode 100644
index 0000000000..a22f8d100e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_else.txt
@@ -0,0 +1 @@
+begin; meth; rescue; foo; else; bar; end
diff --git a/test/yarp/fixtures/whitequark/rescue_else_ensure.txt b/test/yarp/fixtures/whitequark/rescue_else_ensure.txt
new file mode 100644
index 0000000000..167eee194a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_else_ensure.txt
@@ -0,0 +1 @@
+begin; meth; rescue; baz; else foo; ensure; bar end
diff --git a/test/yarp/fixtures/whitequark/rescue_ensure.txt b/test/yarp/fixtures/whitequark/rescue_ensure.txt
new file mode 100644
index 0000000000..8237257c41
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_ensure.txt
@@ -0,0 +1 @@
+begin; meth; rescue; baz; ensure; bar; end
diff --git a/test/yarp/fixtures/whitequark/rescue_in_lambda_block.txt b/test/yarp/fixtures/whitequark/rescue_in_lambda_block.txt
new file mode 100644
index 0000000000..ccd8ed72c5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_in_lambda_block.txt
@@ -0,0 +1 @@
+-> do rescue; end
diff --git a/test/yarp/fixtures/whitequark/rescue_mod.txt b/test/yarp/fixtures/whitequark/rescue_mod.txt
new file mode 100644
index 0000000000..06375d3e9b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_mod.txt
@@ -0,0 +1 @@
+meth rescue bar
diff --git a/test/yarp/fixtures/whitequark/rescue_mod_asgn.txt b/test/yarp/fixtures/whitequark/rescue_mod_asgn.txt
new file mode 100644
index 0000000000..abf7cd9a3d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_mod_asgn.txt
@@ -0,0 +1 @@
+foo = meth rescue bar
diff --git a/test/yarp/fixtures/whitequark/rescue_mod_masgn.txt b/test/yarp/fixtures/whitequark/rescue_mod_masgn.txt
new file mode 100644
index 0000000000..0716eb1f67
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_mod_masgn.txt
@@ -0,0 +1 @@
+foo, bar = meth rescue [1, 2]
diff --git a/test/yarp/fixtures/whitequark/rescue_mod_op_assign.txt b/test/yarp/fixtures/whitequark/rescue_mod_op_assign.txt
new file mode 100644
index 0000000000..178efa3a20
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_mod_op_assign.txt
@@ -0,0 +1 @@
+foo += meth rescue bar
diff --git a/test/yarp/fixtures/whitequark/rescue_without_begin_end.txt b/test/yarp/fixtures/whitequark/rescue_without_begin_end.txt
new file mode 100644
index 0000000000..8416569e2c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/rescue_without_begin_end.txt
@@ -0,0 +1 @@
+meth do; foo; rescue; bar; end
diff --git a/test/yarp/fixtures/whitequark/restarg_named.txt b/test/yarp/fixtures/whitequark/restarg_named.txt
new file mode 100644
index 0000000000..355cd8f493
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/restarg_named.txt
@@ -0,0 +1 @@
+def f(*foo); end
diff --git a/test/yarp/fixtures/whitequark/restarg_unnamed.txt b/test/yarp/fixtures/whitequark/restarg_unnamed.txt
new file mode 100644
index 0000000000..c9932dd30c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/restarg_unnamed.txt
@@ -0,0 +1 @@
+def f(*); end
diff --git a/test/yarp/fixtures/whitequark/retry.txt b/test/yarp/fixtures/whitequark/retry.txt
new file mode 100644
index 0000000000..77428f7b73
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/retry.txt
@@ -0,0 +1 @@
+retry
diff --git a/test/yarp/fixtures/whitequark/return.txt b/test/yarp/fixtures/whitequark/return.txt
new file mode 100644
index 0000000000..e3d966bda0
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/return.txt
@@ -0,0 +1,7 @@
+return
+
+return foo
+
+return()
+
+return(foo)
diff --git a/test/yarp/fixtures/whitequark/return_block.txt b/test/yarp/fixtures/whitequark/return_block.txt
new file mode 100644
index 0000000000..00723a7517
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/return_block.txt
@@ -0,0 +1 @@
+return fun foo do end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_10279.txt b/test/yarp/fixtures/whitequark/ruby_bug_10279.txt
new file mode 100644
index 0000000000..4d0fb213d8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_10279.txt
@@ -0,0 +1 @@
+{a: if true then 42 end}
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_10653.txt b/test/yarp/fixtures/whitequark/ruby_bug_10653.txt
new file mode 100644
index 0000000000..51354a1f70
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_10653.txt
@@ -0,0 +1,5 @@
+false ? raise do end : tap do end
+
+false ? raise {} : tap {}
+
+true ? 1.tap do |n| p n end : 0
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11107.txt b/test/yarp/fixtures/whitequark/ruby_bug_11107.txt
new file mode 100644
index 0000000000..1f28cb06f6
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11107.txt
@@ -0,0 +1 @@
+p ->() do a() do end end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11380.txt b/test/yarp/fixtures/whitequark/ruby_bug_11380.txt
new file mode 100644
index 0000000000..1631548e3a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11380.txt
@@ -0,0 +1 @@
+p -> { :hello }, a: 1 do end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11873.txt b/test/yarp/fixtures/whitequark/ruby_bug_11873.txt
new file mode 100644
index 0000000000..a25aa9e267
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11873.txt
@@ -0,0 +1,23 @@
+a b(c d), "x" do end
+
+a b(c d), /x/ do end
+
+a b(c d), /x/m do end
+
+a b(c(d)), "x" do end
+
+a b(c(d)), /x/ do end
+
+a b(c(d)), /x/m do end
+
+a b{c d}, "x" do end
+
+a b{c d}, /x/ do end
+
+a b{c d}, /x/m do end
+
+a b{c(d)}, "x" do end
+
+a b{c(d)}, /x/ do end
+
+a b{c(d)}, /x/m do end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11873_a.txt b/test/yarp/fixtures/whitequark/ruby_bug_11873_a.txt
new file mode 100644
index 0000000000..1856235ce5
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11873_a.txt
@@ -0,0 +1,39 @@
+a b(c d), 1 do end
+
+a b(c d), 1.0 do end
+
+a b(c d), 1.0i do end
+
+a b(c d), 1.0r do end
+
+a b(c d), :e do end
+
+a b(c(d)), 1 do end
+
+a b(c(d)), 1.0 do end
+
+a b(c(d)), 1.0i do end
+
+a b(c(d)), 1.0r do end
+
+a b(c(d)), :e do end
+
+a b{c d}, 1 do end
+
+a b{c d}, 1.0 do end
+
+a b{c d}, 1.0i do end
+
+a b{c d}, 1.0r do end
+
+a b{c d}, :e do end
+
+a b{c(d)}, 1 do end
+
+a b{c(d)}, 1.0 do end
+
+a b{c(d)}, 1.0i do end
+
+a b{c(d)}, 1.0r do end
+
+a b{c(d)}, :e do end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11873_b.txt b/test/yarp/fixtures/whitequark/ruby_bug_11873_b.txt
new file mode 100644
index 0000000000..1b86662008
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11873_b.txt
@@ -0,0 +1 @@
+p p{p(p);p p}, tap do end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11989.txt b/test/yarp/fixtures/whitequark/ruby_bug_11989.txt
new file mode 100644
index 0000000000..d49b8614ed
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11989.txt
@@ -0,0 +1,3 @@
+p <<~"E"
+  x\n   y
+E
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_11990.txt b/test/yarp/fixtures/whitequark/ruby_bug_11990.txt
new file mode 100644
index 0000000000..d0fe7b2739
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_11990.txt
@@ -0,0 +1,3 @@
+p <<~E "  y"
+  x
+E
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_12073.txt b/test/yarp/fixtures/whitequark/ruby_bug_12073.txt
new file mode 100644
index 0000000000..b2e3784422
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_12073.txt
@@ -0,0 +1,3 @@
+a = 1; a b: 1
+
+def foo raise; raise A::B, ''; end
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_12402.txt b/test/yarp/fixtures/whitequark/ruby_bug_12402.txt
new file mode 100644
index 0000000000..060d5d95a1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_12402.txt
@@ -0,0 +1,27 @@
+foo += raise bar rescue nil
+
+foo += raise(bar) rescue nil
+
+foo = raise bar rescue nil
+
+foo = raise(bar) rescue nil
+
+foo.C += raise bar rescue nil
+
+foo.C += raise(bar) rescue nil
+
+foo.m += raise bar rescue nil
+
+foo.m += raise(bar) rescue nil
+
+foo::C ||= raise bar rescue nil
+
+foo::C ||= raise(bar) rescue nil
+
+foo::m += raise bar rescue nil
+
+foo::m += raise(bar) rescue nil
+
+foo[0] += raise bar rescue nil
+
+foo[0] += raise(bar) rescue nil
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_12669.txt b/test/yarp/fixtures/whitequark/ruby_bug_12669.txt
new file mode 100644
index 0000000000..cd89689446
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_12669.txt
@@ -0,0 +1,7 @@
+a += b += raise :x
+
+a += b = raise :x
+
+a = b += raise :x
+
+a = b = raise :x
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_12686.txt b/test/yarp/fixtures/whitequark/ruby_bug_12686.txt
new file mode 100644
index 0000000000..7742e791b8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_12686.txt
@@ -0,0 +1 @@
+f (g rescue nil)
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_13547.txt b/test/yarp/fixtures/whitequark/ruby_bug_13547.txt
new file mode 100644
index 0000000000..29eafc3a4c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_13547.txt
@@ -0,0 +1 @@
+meth[] {}
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_14690.txt b/test/yarp/fixtures/whitequark/ruby_bug_14690.txt
new file mode 100644
index 0000000000..b73b1d8aad
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_14690.txt
@@ -0,0 +1 @@
+let () { m(a) do; end }
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_15789.txt b/test/yarp/fixtures/whitequark/ruby_bug_15789.txt
new file mode 100644
index 0000000000..6324db5110
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_15789.txt
@@ -0,0 +1,3 @@
+m ->(a = ->{_1}) {a}
+
+m ->(a: ->{_1}) {a}
diff --git a/test/yarp/fixtures/whitequark/ruby_bug_9669.txt b/test/yarp/fixtures/whitequark/ruby_bug_9669.txt
new file mode 100644
index 0000000000..60dfa09d51
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ruby_bug_9669.txt
@@ -0,0 +1,8 @@
+def a b:
+return
+end
+
+o = {
+a:
+1
+}
diff --git a/test/yarp/fixtures/whitequark/sclass.txt b/test/yarp/fixtures/whitequark/sclass.txt
new file mode 100644
index 0000000000..e6aadaef21
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/sclass.txt
@@ -0,0 +1 @@
+class << foo; nil; end
diff --git a/test/yarp/fixtures/whitequark/self.txt b/test/yarp/fixtures/whitequark/self.txt
new file mode 100644
index 0000000000..31f9efa4a1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/self.txt
@@ -0,0 +1 @@
+self
diff --git a/test/yarp/fixtures/whitequark/send_attr_asgn.txt b/test/yarp/fixtures/whitequark/send_attr_asgn.txt
new file mode 100644
index 0000000000..b477966b2a
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_attr_asgn.txt
@@ -0,0 +1,7 @@
+foo.A = 1
+
+foo.a = 1
+
+foo::A = 1
+
+foo::a = 1
diff --git a/test/yarp/fixtures/whitequark/send_attr_asgn_conditional.txt b/test/yarp/fixtures/whitequark/send_attr_asgn_conditional.txt
new file mode 100644
index 0000000000..1279e02cfc
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_attr_asgn_conditional.txt
@@ -0,0 +1 @@
+a&.b = 1
diff --git a/test/yarp/fixtures/whitequark/send_binary_op.txt b/test/yarp/fixtures/whitequark/send_binary_op.txt
new file mode 100644
index 0000000000..3e3e9300b3
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_binary_op.txt
@@ -0,0 +1,41 @@
+foo != 1
+
+foo !~ 1
+
+foo % 1
+
+foo & 1
+
+foo * 1
+
+foo ** 1
+
+foo + 1
+
+foo - 1
+
+foo / 1
+
+foo < 1
+
+foo << 1
+
+foo <= 1
+
+foo <=> 1
+
+foo == 1
+
+foo === 1
+
+foo =~ 1
+
+foo > 1
+
+foo >= 1
+
+foo >> 1
+
+foo ^ 1
+
+foo | 1
diff --git a/test/yarp/fixtures/whitequark/send_block_chain_cmd.txt b/test/yarp/fixtures/whitequark/send_block_chain_cmd.txt
new file mode 100644
index 0000000000..c6fe1aab0e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_block_chain_cmd.txt
@@ -0,0 +1,13 @@
+meth 1 do end.fun bar
+
+meth 1 do end.fun bar do end
+
+meth 1 do end.fun {}
+
+meth 1 do end.fun(bar)
+
+meth 1 do end.fun(bar) {}
+
+meth 1 do end::fun bar
+
+meth 1 do end::fun(bar)
diff --git a/test/yarp/fixtures/whitequark/send_block_conditional.txt b/test/yarp/fixtures/whitequark/send_block_conditional.txt
new file mode 100644
index 0000000000..dcc8361762
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_block_conditional.txt
@@ -0,0 +1 @@
+foo&.bar {}
diff --git a/test/yarp/fixtures/whitequark/send_call.txt b/test/yarp/fixtures/whitequark/send_call.txt
new file mode 100644
index 0000000000..99701270bb
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_call.txt
@@ -0,0 +1,3 @@
+foo.(1)
+
+foo::(1)
diff --git a/test/yarp/fixtures/whitequark/send_conditional.txt b/test/yarp/fixtures/whitequark/send_conditional.txt
new file mode 100644
index 0000000000..8ecd27e0fe
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_conditional.txt
@@ -0,0 +1 @@
+a&.b
diff --git a/test/yarp/fixtures/whitequark/send_index.txt b/test/yarp/fixtures/whitequark/send_index.txt
new file mode 100644
index 0000000000..f9c4dafc4e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_index.txt
@@ -0,0 +1 @@
+foo[1, 2]
diff --git a/test/yarp/fixtures/whitequark/send_index_asgn.txt b/test/yarp/fixtures/whitequark/send_index_asgn.txt
new file mode 100644
index 0000000000..e232fa3b96
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_index_asgn.txt
@@ -0,0 +1 @@
+foo[1, 2] = 3
diff --git a/test/yarp/fixtures/whitequark/send_index_asgn_legacy.txt b/test/yarp/fixtures/whitequark/send_index_asgn_legacy.txt
new file mode 100644
index 0000000000..e232fa3b96
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_index_asgn_legacy.txt
@@ -0,0 +1 @@
+foo[1, 2] = 3
diff --git a/test/yarp/fixtures/whitequark/send_index_cmd.txt b/test/yarp/fixtures/whitequark/send_index_cmd.txt
new file mode 100644
index 0000000000..32090e7536
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_index_cmd.txt
@@ -0,0 +1 @@
+foo[m bar]
diff --git a/test/yarp/fixtures/whitequark/send_index_legacy.txt b/test/yarp/fixtures/whitequark/send_index_legacy.txt
new file mode 100644
index 0000000000..f9c4dafc4e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_index_legacy.txt
@@ -0,0 +1 @@
+foo[1, 2]
diff --git a/test/yarp/fixtures/whitequark/send_lambda.txt b/test/yarp/fixtures/whitequark/send_lambda.txt
new file mode 100644
index 0000000000..eadd6c9c03
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_lambda.txt
@@ -0,0 +1,5 @@
+-> * { }
+
+-> do end
+
+->{ }
diff --git a/test/yarp/fixtures/whitequark/send_lambda_args.txt b/test/yarp/fixtures/whitequark/send_lambda_args.txt
new file mode 100644
index 0000000000..68392f2f34
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_lambda_args.txt
@@ -0,0 +1,3 @@
+-> (a) { }
+
+->(a) { }
diff --git a/test/yarp/fixtures/whitequark/send_lambda_args_noparen.txt b/test/yarp/fixtures/whitequark/send_lambda_args_noparen.txt
new file mode 100644
index 0000000000..c0ae077f95
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_lambda_args_noparen.txt
@@ -0,0 +1,3 @@
+-> a: 1 { }
+
+-> a: { }
diff --git a/test/yarp/fixtures/whitequark/send_lambda_args_shadow.txt b/test/yarp/fixtures/whitequark/send_lambda_args_shadow.txt
new file mode 100644
index 0000000000..230f35ab89
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_lambda_args_shadow.txt
@@ -0,0 +1 @@
+->(a; foo, bar) { }
diff --git a/test/yarp/fixtures/whitequark/send_lambda_legacy.txt b/test/yarp/fixtures/whitequark/send_lambda_legacy.txt
new file mode 100644
index 0000000000..a509407c43
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_lambda_legacy.txt
@@ -0,0 +1 @@
+->{ }
diff --git a/test/yarp/fixtures/whitequark/send_op_asgn_conditional.txt b/test/yarp/fixtures/whitequark/send_op_asgn_conditional.txt
new file mode 100644
index 0000000000..906088dcd1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_op_asgn_conditional.txt
@@ -0,0 +1 @@
+a&.b &&= 1
diff --git a/test/yarp/fixtures/whitequark/send_plain.txt b/test/yarp/fixtures/whitequark/send_plain.txt
new file mode 100644
index 0000000000..ebaf1d18c7
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_plain.txt
@@ -0,0 +1,5 @@
+foo.fun
+
+foo::Fun()
+
+foo::fun
diff --git a/test/yarp/fixtures/whitequark/send_plain_cmd.txt b/test/yarp/fixtures/whitequark/send_plain_cmd.txt
new file mode 100644
index 0000000000..e3fd63f272
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_plain_cmd.txt
@@ -0,0 +1,5 @@
+foo.fun bar
+
+foo::Fun bar
+
+foo::fun bar
diff --git a/test/yarp/fixtures/whitequark/send_self.txt b/test/yarp/fixtures/whitequark/send_self.txt
new file mode 100644
index 0000000000..f084b9bca7
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_self.txt
@@ -0,0 +1,5 @@
+fun
+
+fun!
+
+fun(1)
diff --git a/test/yarp/fixtures/whitequark/send_self_block.txt b/test/yarp/fixtures/whitequark/send_self_block.txt
new file mode 100644
index 0000000000..1cd6703c82
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_self_block.txt
@@ -0,0 +1,7 @@
+fun do end
+
+fun { }
+
+fun() { }
+
+fun(1) { }
diff --git a/test/yarp/fixtures/whitequark/send_unary_op.txt b/test/yarp/fixtures/whitequark/send_unary_op.txt
new file mode 100644
index 0000000000..73814d199f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/send_unary_op.txt
@@ -0,0 +1,5 @@
++foo
+
+-foo
+
+~foo
diff --git a/test/yarp/fixtures/whitequark/slash_newline_in_heredocs.txt b/test/yarp/fixtures/whitequark/slash_newline_in_heredocs.txt
new file mode 100644
index 0000000000..4962a058ea
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/slash_newline_in_heredocs.txt
@@ -0,0 +1,13 @@
+<<-E
+    1 \
+    2
+    3
+E
+
+
+<<~E
+    1 \
+    2
+    3
+E
+
diff --git a/test/yarp/fixtures/whitequark/space_args_arg.txt b/test/yarp/fixtures/whitequark/space_args_arg.txt
new file mode 100644
index 0000000000..47957cba54
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/space_args_arg.txt
@@ -0,0 +1 @@
+fun (1)
diff --git a/test/yarp/fixtures/whitequark/space_args_arg_block.txt b/test/yarp/fixtures/whitequark/space_args_arg_block.txt
new file mode 100644
index 0000000000..5560a82818
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/space_args_arg_block.txt
@@ -0,0 +1,5 @@
+foo.fun (1) {}
+
+foo::fun (1) {}
+
+fun (1) {}
diff --git a/test/yarp/fixtures/whitequark/space_args_arg_call.txt b/test/yarp/fixtures/whitequark/space_args_arg_call.txt
new file mode 100644
index 0000000000..3b0ae831fe
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/space_args_arg_call.txt
@@ -0,0 +1 @@
+fun (1).to_i
diff --git a/test/yarp/fixtures/whitequark/space_args_arg_newline.txt b/test/yarp/fixtures/whitequark/space_args_arg_newline.txt
new file mode 100644
index 0000000000..a6cdac6ed1
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/space_args_arg_newline.txt
@@ -0,0 +1,2 @@
+fun (1
+)
diff --git a/test/yarp/fixtures/whitequark/space_args_block.txt b/test/yarp/fixtures/whitequark/space_args_block.txt
new file mode 100644
index 0000000000..555a097605
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/space_args_block.txt
@@ -0,0 +1 @@
+fun () {}
diff --git a/test/yarp/fixtures/whitequark/space_args_cmd.txt b/test/yarp/fixtures/whitequark/space_args_cmd.txt
new file mode 100644
index 0000000000..a749695cb7
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/space_args_cmd.txt
@@ -0,0 +1 @@
+fun (f bar)
diff --git a/test/yarp/fixtures/whitequark/string___FILE__.txt b/test/yarp/fixtures/whitequark/string___FILE__.txt
new file mode 100644
index 0000000000..4815727d05
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/string___FILE__.txt
@@ -0,0 +1 @@
+__FILE__
diff --git a/test/yarp/fixtures/whitequark/string_concat.txt b/test/yarp/fixtures/whitequark/string_concat.txt
new file mode 100644
index 0000000000..30cc4f8116
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/string_concat.txt
@@ -0,0 +1 @@
+"foo#@a" "bar"
diff --git a/test/yarp/fixtures/whitequark/string_dvar.txt b/test/yarp/fixtures/whitequark/string_dvar.txt
new file mode 100644
index 0000000000..bbe5b617b2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/string_dvar.txt
@@ -0,0 +1 @@
+"#@a #@@a #$a"
diff --git a/test/yarp/fixtures/whitequark/string_interp.txt b/test/yarp/fixtures/whitequark/string_interp.txt
new file mode 100644
index 0000000000..5fdd803341
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/string_interp.txt
@@ -0,0 +1 @@
+"foo#{bar}baz"
diff --git a/test/yarp/fixtures/whitequark/string_plain.txt b/test/yarp/fixtures/whitequark/string_plain.txt
new file mode 100644
index 0000000000..4aca78decb
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/string_plain.txt
@@ -0,0 +1,3 @@
+%q(foobar)
+
+'foobar'
diff --git a/test/yarp/fixtures/whitequark/super.txt b/test/yarp/fixtures/whitequark/super.txt
new file mode 100644
index 0000000000..9e68a9e988
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/super.txt
@@ -0,0 +1,5 @@
+super foo
+
+super()
+
+super(foo)
diff --git a/test/yarp/fixtures/whitequark/super_block.txt b/test/yarp/fixtures/whitequark/super_block.txt
new file mode 100644
index 0000000000..05a7d7fdd8
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/super_block.txt
@@ -0,0 +1,3 @@
+super do end
+
+super foo, bar do end
diff --git a/test/yarp/fixtures/whitequark/symbol_interp.txt b/test/yarp/fixtures/whitequark/symbol_interp.txt
new file mode 100644
index 0000000000..d5011b270d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/symbol_interp.txt
@@ -0,0 +1 @@
+:"foo#{bar}baz"
diff --git a/test/yarp/fixtures/whitequark/symbol_plain.txt b/test/yarp/fixtures/whitequark/symbol_plain.txt
new file mode 100644
index 0000000000..fd1fd0017c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/symbol_plain.txt
@@ -0,0 +1,3 @@
+:'foo'
+
+:foo
diff --git a/test/yarp/fixtures/whitequark/ternary.txt b/test/yarp/fixtures/whitequark/ternary.txt
new file mode 100644
index 0000000000..3a149d4e1c
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ternary.txt
@@ -0,0 +1 @@
+foo ? 1 : 2
diff --git a/test/yarp/fixtures/whitequark/ternary_ambiguous_symbol.txt b/test/yarp/fixtures/whitequark/ternary_ambiguous_symbol.txt
new file mode 100644
index 0000000000..19aa523c07
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/ternary_ambiguous_symbol.txt
@@ -0,0 +1 @@
+t=1;(foo)?t:T
diff --git a/test/yarp/fixtures/whitequark/trailing_forward_arg.txt b/test/yarp/fixtures/whitequark/trailing_forward_arg.txt
new file mode 100644
index 0000000000..043870ade2
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/trailing_forward_arg.txt
@@ -0,0 +1 @@
+def foo(a, b, ...); bar(a, 42, ...); end
diff --git a/test/yarp/fixtures/whitequark/true.txt b/test/yarp/fixtures/whitequark/true.txt
new file mode 100644
index 0000000000..27ba77ddaf
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/true.txt
@@ -0,0 +1 @@
+true
diff --git a/test/yarp/fixtures/whitequark/unary_num_pow_precedence.txt b/test/yarp/fixtures/whitequark/unary_num_pow_precedence.txt
new file mode 100644
index 0000000000..f0343e3c8b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/unary_num_pow_precedence.txt
@@ -0,0 +1,5 @@
++2.0 ** 10
+
+-2 ** 10
+
+-2.0 ** 10
diff --git a/test/yarp/fixtures/whitequark/undef.txt b/test/yarp/fixtures/whitequark/undef.txt
new file mode 100644
index 0000000000..3e88ec7084
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/undef.txt
@@ -0,0 +1 @@
+undef foo, :bar, :"foo#{1}"
diff --git a/test/yarp/fixtures/whitequark/unless.txt b/test/yarp/fixtures/whitequark/unless.txt
new file mode 100644
index 0000000000..d04043ed90
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/unless.txt
@@ -0,0 +1,3 @@
+unless foo then bar; end
+
+unless foo; bar; end
diff --git a/test/yarp/fixtures/whitequark/unless_else.txt b/test/yarp/fixtures/whitequark/unless_else.txt
new file mode 100644
index 0000000000..8243d42031
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/unless_else.txt
@@ -0,0 +1,3 @@
+unless foo then bar; else baz; end
+
+unless foo; bar; else baz; end
diff --git a/test/yarp/fixtures/whitequark/unless_mod.txt b/test/yarp/fixtures/whitequark/unless_mod.txt
new file mode 100644
index 0000000000..2d0376a310
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/unless_mod.txt
@@ -0,0 +1 @@
+bar unless foo
diff --git a/test/yarp/fixtures/whitequark/until.txt b/test/yarp/fixtures/whitequark/until.txt
new file mode 100644
index 0000000000..06082233cb
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/until.txt
@@ -0,0 +1,3 @@
+until foo do meth end
+
+until foo; meth end
diff --git a/test/yarp/fixtures/whitequark/until_mod.txt b/test/yarp/fixtures/whitequark/until_mod.txt
new file mode 100644
index 0000000000..46a85d2ba9
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/until_mod.txt
@@ -0,0 +1 @@
+meth until foo
diff --git a/test/yarp/fixtures/whitequark/until_post.txt b/test/yarp/fixtures/whitequark/until_post.txt
new file mode 100644
index 0000000000..988e43b665
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/until_post.txt
@@ -0,0 +1 @@
+begin meth end until foo
diff --git a/test/yarp/fixtures/whitequark/var_and_asgn.txt b/test/yarp/fixtures/whitequark/var_and_asgn.txt
new file mode 100644
index 0000000000..25502968f9
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/var_and_asgn.txt
@@ -0,0 +1 @@
+a &&= 1
diff --git a/test/yarp/fixtures/whitequark/var_op_asgn.txt b/test/yarp/fixtures/whitequark/var_op_asgn.txt
new file mode 100644
index 0000000000..402d818a7e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/var_op_asgn.txt
@@ -0,0 +1,7 @@
+@@var |= 10
+
+@a |= 1
+
+a += 1
+
+def a; @@var |= 10; end
diff --git a/test/yarp/fixtures/whitequark/var_op_asgn_cmd.txt b/test/yarp/fixtures/whitequark/var_op_asgn_cmd.txt
new file mode 100644
index 0000000000..33f4bc0e73
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/var_op_asgn_cmd.txt
@@ -0,0 +1 @@
+foo += m foo
diff --git a/test/yarp/fixtures/whitequark/var_or_asgn.txt b/test/yarp/fixtures/whitequark/var_or_asgn.txt
new file mode 100644
index 0000000000..aa30b3d5ca
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/var_or_asgn.txt
@@ -0,0 +1 @@
+a ||= 1
diff --git a/test/yarp/fixtures/whitequark/when_multi.txt b/test/yarp/fixtures/whitequark/when_multi.txt
new file mode 100644
index 0000000000..b4fbd33125
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/when_multi.txt
@@ -0,0 +1 @@
+case foo; when 'bar', 'baz'; bar; end
diff --git a/test/yarp/fixtures/whitequark/when_splat.txt b/test/yarp/fixtures/whitequark/when_splat.txt
new file mode 100644
index 0000000000..695e5da34e
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/when_splat.txt
@@ -0,0 +1 @@
+case foo; when 1, *baz; bar; when *foo; end
diff --git a/test/yarp/fixtures/whitequark/when_then.txt b/test/yarp/fixtures/whitequark/when_then.txt
new file mode 100644
index 0000000000..63293452b3
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/when_then.txt
@@ -0,0 +1 @@
+case foo; when 'bar' then bar; end
diff --git a/test/yarp/fixtures/whitequark/while.txt b/test/yarp/fixtures/whitequark/while.txt
new file mode 100644
index 0000000000..28b204f247
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/while.txt
@@ -0,0 +1,3 @@
+while foo do meth end
+
+while foo; meth end
diff --git a/test/yarp/fixtures/whitequark/while_mod.txt b/test/yarp/fixtures/whitequark/while_mod.txt
new file mode 100644
index 0000000000..ce3cf01d14
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/while_mod.txt
@@ -0,0 +1 @@
+meth while foo
diff --git a/test/yarp/fixtures/whitequark/while_post.txt b/test/yarp/fixtures/whitequark/while_post.txt
new file mode 100644
index 0000000000..ac6e05008b
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/while_post.txt
@@ -0,0 +1 @@
+begin meth end while foo
diff --git a/test/yarp/fixtures/whitequark/xstring_interp.txt b/test/yarp/fixtures/whitequark/xstring_interp.txt
new file mode 100644
index 0000000000..dfede8123f
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/xstring_interp.txt
@@ -0,0 +1 @@
+`foo#{bar}baz`
diff --git a/test/yarp/fixtures/whitequark/xstring_plain.txt b/test/yarp/fixtures/whitequark/xstring_plain.txt
new file mode 100644
index 0000000000..fce255049d
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/xstring_plain.txt
@@ -0,0 +1 @@
+`foobar`
diff --git a/test/yarp/fixtures/whitequark/yield.txt b/test/yarp/fixtures/whitequark/yield.txt
new file mode 100644
index 0000000000..0ecf639589
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/yield.txt
@@ -0,0 +1,7 @@
+yield
+
+yield foo
+
+yield()
+
+yield(foo)
diff --git a/test/yarp/fixtures/whitequark/zsuper.txt b/test/yarp/fixtures/whitequark/zsuper.txt
new file mode 100644
index 0000000000..16f5c2d3aa
--- /dev/null
+++ b/test/yarp/fixtures/whitequark/zsuper.txt
@@ -0,0 +1 @@
+super
diff --git a/test/yarp/fixtures/xstring.txt b/test/yarp/fixtures/xstring.txt
new file mode 100644
index 0000000000..01bcc09fc5
--- /dev/null
+++ b/test/yarp/fixtures/xstring.txt
@@ -0,0 +1,7 @@
+%x[foo]
+
+`foo #{bar} baz`
+
+`f\oo`
+
+`foo`
diff --git a/test/yarp/fixtures/yield.txt b/test/yarp/fixtures/yield.txt
new file mode 100644
index 0000000000..d75ab57a18
--- /dev/null
+++ b/test/yarp/fixtures/yield.txt
@@ -0,0 +1,7 @@
+yield
+
+yield()
+
+yield(1)
+
+yield(1, 2, 3)
diff --git a/test/yarp/heredoc_dedent_test.rb b/test/yarp/heredoc_dedent_test.rb
new file mode 100644
index 0000000000..64627c564f
--- /dev/null
+++ b/test/yarp/heredoc_dedent_test.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+module YARP
+  class HeredocDedentTest < Test::Unit::TestCase
+    filepath = File.expand_path("fixtures/tilde_heredocs.txt", __dir__)
+
+    File.read(filepath).split(/(?=\n)\n(?=<)/).each_with_index do |heredoc, index|
+      define_method "test_heredoc_#{index}" do
+        parts = YARP.parse(heredoc).value.statements.body.first.parts
+        actual = parts.map { |part| part.is_a?(StringNode) ? part.unescaped : "1" }.join
+
+        assert_equal(eval(heredoc), actual, "Expected heredocs to match.")
+      end
+    end
+  end
+end
diff --git a/test/yarp/language_server_test.rb b/test/yarp/language_server_test.rb
new file mode 100644
index 0000000000..4561911c01
--- /dev/null
+++ b/test/yarp/language_server_test.rb
@@ -0,0 +1,363 @@
+# frozen_string_literal: true
+
+require_relative "yarp_test_helper"
+require "yarp/language_server"
+
+module YARP
+  class LanguageServerTest < Test::Unit::TestCase
+    module Request
+      # Represents a hash pattern.
+      class Shape
+        attr_reader :values
+
+        def initialize(values)
+          @values = values
+        end
+
+        def ===(other)
+          values.all? do |key, value|
+            value == :any ? other.key?(key) : value === other[key]
+          end
+        end
+      end
+
+      # Represents an array pattern.
+      class Tuple
+        attr_reader :values
+
+        def initialize(values)
+          @values = values
+        end
+
+        def ===(other)
+          values.each_with_index.all? { |value, index| value === other[index] }
+        end
+      end
+
+      def self.[](value)
+        case value
+        when Array
+          Tuple.new(value.map { |child| self[child] })
+        when Hash
+          Shape.new(value.transform_values { |child| self[child] })
+        else
+          value
+        end
+      end
+    end
+
+    class Initialize < Struct.new(:id)
+      def to_hash
+        { method: "initialize", id: id }
+      end
+    end
+
+    class Shutdown < Struct.new(:id)
+      def to_hash
+        { method: "shutdown", id: id }
+      end
+    end
+
+    class TextDocumentDidOpen < Struct.new(:uri, :text)
+      def to_hash
+        {
+          method: "textDocument/didOpen",
+          params: { textDocument: { uri: uri, text: text } }
+        }
+      end
+    end
+
+    class TextDocumentDidChange < Struct.new(:uri, :text)
+      def to_hash
+        {
+          method: "textDocument/didChange",
+          params: {
+            textDocument: { uri: uri },
+            contentChanges: [{ text: text }]
+          }
+        }
+      end
+    end
+
+    class TextDocumentDidClose < Struct.new(:uri)
+      def to_hash
+        {
+          method: "textDocument/didClose",
+          params: { textDocument: { uri: uri } }
+        }
+      end
+    end
+
+    class TextDocumentCodeAction < Struct.new(:id, :uri, :diagnostics)
+      def to_hash
+        {
+          method: "textDocument/codeAction",
+          id: id,
+          params: {
+            textDocument: { uri: uri },
+            context: {
+              diagnostics: diagnostics,
+            },
+          },
+        }
+      end
+    end
+
+    class TextDocumentDiagnostic < Struct.new(:id, :uri)
+      def to_hash
+        {
+          method: "textDocument/diagnostic",
+          id: id,
+          params: {
+            textDocument: { uri: uri },
+          }
+        }
+      end
+    end
+
+    def test_reading_file
+      Tempfile.create(%w[test- .rb]) do |file|
+        file.write("class Foo; end")
+        file.rewind
+
+        responses = run_server([
+          Initialize.new(1),
+          Shutdown.new(3)
+        ])
+
+        shape = Request[[
+          { id: 1, result: { capabilities: Hash } },
+          { id: 3, result: {} }
+        ]]
+
+        assert_operator(shape, :===, responses)
+      end
+    end
+
+    def test_clean_shutdown
+      responses = run_server([Initialize.new(1), Shutdown.new(2)])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+    end
+
+    def test_file_that_does_not_exist
+      responses = run_server([
+        Initialize.new(1),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+    end
+
+    def test_code_action_request
+      message = "this is an error"
+      diagnostic = {
+        range: { start: { line: 0, character: 0 }, end: { line: 0, character: 0 } },
+        message: message,
+        severity: 1,
+      }
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentDidOpen.new("file:///path/to/file.rb", <<~RUBY),
+          1 + (
+        RUBY
+        TextDocumentCodeAction.new(2, "file:///path/to/file.rb", [diagnostic]),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: [
+            {
+              title: "Report incorrect error: `#{message}`",
+              kind: "quickfix",
+              diagnostics: [diagnostic],
+              command: {
+                title: "Report incorrect error",
+                command: "vscode.open",
+                arguments: [String]
+              }
+            }
+          ],
+        },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+      assert(responses.dig(1, :result, 0, :command, :arguments, 0).include?(URI.encode_www_form_component(message)))
+    end
+
+    def test_code_action_request_no_diagnostic
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentDidOpen.new("file:///path/to/file.rb", <<~RUBY),
+          1 + (
+        RUBY
+        TextDocumentCodeAction.new(2, "file:///path/to/file.rb", []),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: [] },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+    end
+
+    def test_code_action_request_no_content
+      message = "this is an error"
+      diagnostic = {
+        range: { start: { line: 0, character: 0 }, end: { line: 0, character: 0 } },
+        message: message,
+        severity: 1,
+      }
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentCodeAction.new(2, "file:///path/to/file.rb", [diagnostic]),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: nil },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+    end
+
+    def test_diagnostics_request_error
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentDidOpen.new("file:///path/to/file.rb", <<~RUBY),
+          1 + (
+        RUBY
+        TextDocumentDiagnostic.new(2, "file:///path/to/file.rb"),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: { kind: "full", items: [
+          {
+            range: {
+              start: { line: Integer, character: Integer },
+              end: { line: Integer, character: Integer }
+            },
+            message: String,
+            severity: Integer
+          },
+        ] } },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+      assert(responses.dig(1, :result, :items).count { |item| item[:severity] == 1 } > 0)
+    end
+
+    def test_diagnostics_request_warning
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentDidOpen.new("file:///path/to/file.rb", <<~RUBY),
+          a/b /c
+        RUBY
+        TextDocumentDiagnostic.new(2, "file:///path/to/file.rb"),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: { kind: "full", items: [
+          {
+            range: {
+              start: { line: Integer, character: Integer },
+              end: { line: Integer, character: Integer }
+            },
+            message: String,
+            severity: Integer
+          },
+        ] } },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+      assert(responses.dig(1, :result, :items).count { |item| item[:severity] == 2 } > 0)
+    end
+
+    def test_diagnostics_request_nothing
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentDidOpen.new("file:///path/to/file.rb", <<~RUBY),
+          a = 1
+        RUBY
+        TextDocumentDiagnostic.new(2, "file:///path/to/file.rb"),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: { kind: "full", items: [] } },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+      assert_equal(0, responses.dig(1, :result, :items).size)
+    end
+
+    def test_diagnostics_request_no_content
+      responses = run_server([
+        Initialize.new(1),
+        TextDocumentDiagnostic.new(2, "file:///path/to/file.rb"),
+        Shutdown.new(3)
+      ])
+
+      shape = Request[[
+        { id: 1, result: { capabilities: Hash } },
+        { id: 2, result: nil },
+        { id: 3, result: {} }
+      ]]
+
+      assert_operator(shape, :===, responses)
+    end
+
+    private
+
+    def write(content)
+      request = content.to_hash.merge(jsonrpc: "2.0").to_json
+      "Content-Length: #{request.bytesize}\r\n\r\n#{request}"
+    end
+
+    def read(content)
+      [].tap do |messages|
+        while (headers = content.gets("\r\n\r\n"))
+          source = content.read(headers[/Content-Length: (\d+)/i, 1].to_i)
+          messages << JSON.parse(source, symbolize_names: true)
+        end
+      end
+    end
+
+    def run_server(messages)
+      input = StringIO.new(messages.map { |message| write(message) }.join)
+      output = StringIO.new
+
+      LanguageServer.new(
+        input: input,
+        output: output,
+      ).run
+
+      read(output.tap(&:rewind))
+    end
+  end
+end
diff --git a/test/yarp/location_test.rb b/test/yarp/location_test.rb
new file mode 100644
index 0000000000..2f551949e5
--- /dev/null
+++ b/test/yarp/location_test.rb
@@ -0,0 +1,766 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+module YARP
+  class LocationTest < Test::Unit::TestCase
+    def test_AliasNode
+      assert_location(AliasNode, "alias foo bar")
+    end
+
+    def test_AlternationPatternNode
+      assert_location(AlternationPatternNode, "foo => bar | baz", 7...16, &:pattern)
+    end
+
+    def test_AndNode
+      assert_location(AndNode, "foo and bar")
+      assert_location(AndNode, "foo && bar")
+    end
+
+    def test_ArgumentsNode
+      assert_location(ArgumentsNode, "foo(bar, baz, qux)", 4...17, &:arguments)
+    end
+
+    def test_ArrayNode
+      assert_location(ArrayNode, "[foo, bar, baz]")
+      assert_location(ArrayNode, "%i[foo bar baz]")
+      assert_location(ArrayNode, "%I[foo bar baz]")
+      assert_location(ArrayNode, "%w[foo bar baz]")
+      assert_location(ArrayNode, "%W[foo bar baz]")
+    end
+
+    def test_ArrayPatternNode
+      assert_location(ArrayPatternNode, "foo => bar, baz", 7...15, &:pattern)
+      assert_location(ArrayPatternNode, "foo => [bar, baz]", 7...17, &:pattern)
+      assert_location(ArrayPatternNode, "foo => *bar", 7...11, &:pattern)
+      assert_location(ArrayPatternNode, "foo => []", 7...9, &:pattern)
+      assert_location(ArrayPatternNode, "foo => Foo[]", 7...12, &:pattern)
+      assert_location(ArrayPatternNode, "foo => Foo[bar]", 7...15, &:pattern)
+    end
+
+    def test_AssocNode
+      assert_location(AssocNode, "{ foo: :bar }", 2...11) { |node| node.elements.first }
+      assert_location(AssocNode, "{ :foo => :bar }", 2...14) { |node| node.elements.first }
+      assert_location(AssocNode, "foo(bar: :baz)", 4...13) { |node| node.arguments.arguments.first.elements.first }
+    end
+
+    def test_AssocSplatNode
+      assert_location(AssocSplatNode, "{ **foo }", 2...7) { |node| node.elements.first }
+      assert_location(AssocSplatNode, "foo(**bar)", 4...9) { |node| node.arguments.arguments.first.elements.first }
+    end
+
+    def test_BackReferenceReadNode
+      assert_location(BackReferenceReadNode, "$+")
+    end
+
+    def test_BeginNode
+      assert_location(BeginNode, "begin foo end")
+      assert_location(BeginNode, "begin foo rescue bar end")
+      assert_location(BeginNode, "begin foo; rescue bar\nelse baz end")
+      assert_location(BeginNode, "begin foo; rescue bar\nelse baz\nensure qux end")
+
+      assert_location(BeginNode, "class Foo\nrescue then end", 10..25, &:statements)
+      assert_location(BeginNode, "module Foo\nrescue then end", 11..26, &:statements)
+    end
+
+    def test_BlockArgumentNode
+      assert_location(BlockArgumentNode, "foo(&bar)", 4...8) { |node| node.arguments.arguments.last }
+    end
+
+    def test_BlockNode
+      assert_location(BlockNode, "foo {}", 4...6, &:block)
+      assert_location(BlockNode, "foo do end", 4...10, &:block)
+    end
+
+    def test_BlockParameterNode
+      assert_location(BlockParameterNode, "def foo(&bar) end", 8...12) { |node| node.parameters.block }
+    end
+
+    def test_BlockParametersNode
+      assert_location(BlockParametersNode, "foo { || }", 6...8) { |node| node.block.parameters }
+      assert_location(BlockParametersNode, "foo { |bar| baz }", 6...11) { |node| node.block.parameters }
+      assert_location(BlockParametersNode, "foo { |bar; baz| baz }", 6...16) { |node| node.block.parameters }
+
+      assert_location(BlockParametersNode, "-> () {}", 3...5, &:parameters)
+      assert_location(BlockParametersNode, "-> (bar) { baz }", 3...8, &:parameters)
+      assert_location(BlockParametersNode, "-> (bar; baz) { baz }", 3...13, &:parameters)
+    end
+
+    def test_BreakNode
+      assert_location(BreakNode, "break")
+      assert_location(BreakNode, "break foo")
+      assert_location(BreakNode, "break foo, bar")
+      assert_location(BreakNode, "break(foo)")
+    end
+
+    def test_CallNode
+      assert_location(CallNode, "foo")
+      assert_location(CallNode, "foo?")
+      assert_location(CallNode, "foo!")
+
+      assert_location(CallNode, "foo()")
+      assert_location(CallNode, "foo?()")
+      assert_location(CallNode, "foo!()")
+
+      assert_location(CallNode, "foo(bar)")
+      assert_location(CallNode, "foo?(bar)")
+      assert_location(CallNode, "foo!(bar)")
+
+      assert_location(CallNode, "!foo")
+      assert_location(CallNode, "~foo")
+      assert_location(CallNode, "+foo")
+      assert_location(CallNode, "-foo")
+
+      assert_location(CallNode, "not foo")
+      assert_location(CallNode, "not(foo)")
+      assert_location(CallNode, "not()")
+
+      assert_location(CallNode, "foo + bar")
+      assert_location(CallNode, "foo -\n  bar")
+
+      assert_location(CallNode, "Foo()")
+      assert_location(CallNode, "Foo(bar)")
+
+      assert_location(CallNode, "Foo::Bar()")
+      assert_location(CallNode, "Foo::Bar(baz)")
+
+      assert_location(CallNode, "Foo::bar")
+      assert_location(CallNode, "Foo::bar()")
+      assert_location(CallNode, "Foo::bar(baz)")
+
+      assert_location(CallNode, "Foo.bar")
+      assert_location(CallNode, "Foo.bar()")
+      assert_location(CallNode, "Foo.bar(baz)")
+
+      assert_location(CallNode, "foo::bar")
+      assert_location(CallNode, "foo::bar()")
+      assert_location(CallNode, "foo::bar(baz)")
+
+      assert_location(CallNode, "foo.bar")
+      assert_location(CallNode, "foo.bar()")
+      assert_location(CallNode, "foo.bar(baz)")
+
+      assert_location(CallNode, "foo&.bar")
+      assert_location(CallNode, "foo&.bar()")
+      assert_location(CallNode, "foo&.bar(baz)")
+
+      assert_location(CallNode, "foo[]")
+      assert_location(CallNode, "foo[bar]")
+      assert_location(CallNode, "foo[bar, baz]")
+
+      assert_location(CallNode, "foo[] = 1")
+      assert_location(CallNode, "foo[bar] = 1")
+      assert_location(CallNode, "foo[bar, baz] = 1")
+
+      assert_location(CallNode, "foo.()")
+      assert_location(CallNode, "foo.(bar)")
+
+      assert_location(CallNode, "foo&.()")
+      assert_location(CallNode, "foo&.(bar)")
+
+      assert_location(CallNode, "foo::()")
+      assert_location(CallNode, "foo::(bar)")
+      assert_location(CallNode, "foo::(bar, baz)")
+
+      assert_location(CallNode, "foo bar baz")
+      assert_location(CallNode, "foo bar('baz')")
+    end
+
+    def test_CallOperatorAndWriteNode
+      assert_location(CallOperatorAndWriteNode, "foo.foo &&= bar")
+      assert_location(CallOperatorAndWriteNode, "foo[foo] &&= bar")
+    end
+
+    def test_CallOperatorWriteNode
+      assert_location(CallOperatorWriteNode, "foo.foo += bar")
+      assert_location(CallOperatorWriteNode, "foo[foo] += bar")
+    end
+
+    def test_CallOperatorOrWriteNode
+      assert_location(CallOperatorOrWriteNode, "foo.foo ||= bar")
+      assert_location(CallOperatorOrWriteNode, "foo[foo] ||= bar")
+    end
+
+    def test_CapturePatternNode
+      assert_location(CapturePatternNode, "case foo; in bar => baz; end", 13...23) do |node|
+        node.conditions.first.pattern
+      end
+    end
+
+    def test_CaseNode
+      assert_location(CaseNode, "case foo; when bar; end")
+      assert_location(CaseNode, "case foo; when bar; else; end")
+      assert_location(CaseNode, "case foo; when bar; when baz; end")
+      assert_location(CaseNode, "case foo; when bar; when baz; else; end")
+    end
+
+    def test_ClassNode
+      assert_location(ClassNode, "class Foo end")
+      assert_location(ClassNode, "class Foo < Bar end")
+    end
+
+    def test_ClassVariableOperatorAndWriteNode
+      assert_location(ClassVariableOperatorAndWriteNode, "@@foo &&= bar")
+    end
+
+    def test_ClassVariableOperatorWriteNode
+      assert_location(ClassVariableOperatorWriteNode, "@@foo += bar")
+    end
+
+    def test_ClassVariableOperatorOrWriteNode
+      assert_location(ClassVariableOperatorOrWriteNode, "@@foo ||= bar")
+    end
+
+    def test_ClassVariableReadNode
+      assert_location(ClassVariableReadNode, "@@foo")
+    end
+
+    def test_ClassVariableWriteNode
+      assert_location(ClassVariableWriteNode, "@@foo = bar")
+    end
+
+    def test_ConstantPathNode
+      assert_location(ConstantPathNode, "Foo::Bar")
+      assert_location(ConstantPathNode, "::Foo")
+      assert_location(ConstantPathNode, "::Foo::Bar")
+    end
+
+    def test_ConstantPathWriteNode
+      assert_location(ConstantPathWriteNode, "Foo::Bar = baz")
+      assert_location(ConstantPathWriteNode, "::Foo = bar")
+      assert_location(ConstantPathWriteNode, "::Foo::Bar = baz")
+    end
+
+    def test_ConstantPathOperatorAndWriteNode
+      assert_location(ConstantPathOperatorAndWriteNode, "Parent::Child &&= bar")
+    end
+
+    def test_ConstantPathOperatorWriteNode
+      assert_location(ConstantPathOperatorWriteNode, "Parent::Child += bar")
+    end
+
+    def test_ConstantPathOperatorOrWriteNode
+      assert_location(ConstantPathOperatorOrWriteNode, "Parent::Child ||= bar")
+    end
+
+    def test_ConstantOperatorAndWriteNode
+      assert_location(ConstantOperatorAndWriteNode, "Foo &&= bar")
+    end
+
+    def test_ConstantOperatorWriteNode
+      assert_location(ConstantOperatorWriteNode, "Foo += bar")
+    end
+
+    def test_ConstantOperatorOrWriteNode
+      assert_location(ConstantOperatorOrWriteNode, "Foo ||= bar")
+    end
+
+    def test_ConstantReadNode
+      assert_location(ConstantReadNode, "Foo")
+      assert_location(ConstantReadNode, "Foo::Bar", 5...8, &:child)
+    end
+
+    def test_DefNode
+      assert_location(DefNode, "def foo; bar; end")
+      assert_location(DefNode, "def foo = bar")
+      assert_location(DefNode, "def foo.bar; baz; end")
+      assert_location(DefNode, "def foo.bar = baz")
+    end
+
+    def test_DefinedNode
+      assert_location(DefinedNode, "defined? foo")
+      assert_location(DefinedNode, "defined?(foo)")
+    end
+
+    def test_ElseNode
+      assert_location(ElseNode, "if foo; bar; else; baz; end", 13...27, &:consequent)
+      assert_location(ElseNode, "foo ? bar : baz", 10...15, &:consequent)
+    end
+
+    def test_EmbeddedStatementsNode
+      assert_location(EmbeddedStatementsNode, '"foo #{bar} baz"', 5...11) { |node| node.parts[1] }
+    end
+
+    def test_EmbeddedVariableNode
+      assert_location(EmbeddedVariableNode, '"foo #@@bar baz"', 5...11) { |node| node.parts[1] }
+    end
+
+    def test_EnsureNode
+      assert_location(EnsureNode, "begin; foo; ensure; bar; end", 12...28, &:ensure_clause)
+    end
+
+    def test_FalseNode
+      assert_location(FalseNode, "false")
+    end
+
+    def test_FindPatternNode
+      assert_location(FindPatternNode, "case foo; in *, bar, *; end", 13...22) do |node|
+        node.conditions.first.pattern
+      end
+    end
+
+    def test_FloatNode
+      assert_location(FloatNode, "0.0")
+      assert_location(FloatNode, "1.0")
+      assert_location(FloatNode, "1.0e10")
+      assert_location(FloatNode, "1.0e-10")
+    end
+
+    def test_ForNode
+      assert_location(ForNode, "for foo in bar; end")
+      assert_location(ForNode, "for foo, bar in baz do end")
+    end
+
+    def test_ForwardingArgumentsNode
+      assert_location(ForwardingArgumentsNode, "def foo(...); bar(...); end", 18...21) do |node|
+        node.statements.body.first.arguments.arguments.first
+      end
+    end
+
+    def test_ForwardingParameterNode
+      assert_location(ForwardingParameterNode, "def foo(...); end", 8...11) do |node|
+        node.parameters.keyword_rest
+      end
+    end
+
+    def test_ForwardingSuperNode
+      assert_location(ForwardingSuperNode, "super")
+      assert_location(ForwardingSuperNode, "super {}")
+    end
+
+    def test_GlobalVariableOperatorAndWriteNode
+      assert_location(GlobalVariableOperatorAndWriteNode, "$foo &&= bar")
+    end
+
+    def test_GlobalVariableOperatorWriteNode
+      assert_location(GlobalVariableOperatorWriteNode, "$foo += bar")
+    end
+
+    def test_GlobalVariableOperatorOrWriteNode
+      assert_location(GlobalVariableOperatorOrWriteNode, "$foo ||= bar")
+    end
+
+    def test_GlobalVariableReadNode
+      assert_location(GlobalVariableReadNode, "$foo")
+    end
+
+    def test_GlobalVariableWriteNode
+      assert_location(GlobalVariableWriteNode, "$foo = bar")
+    end
+
+    def test_HashNode
+      assert_location(HashNode, "{ foo: 2 }")
+      assert_location(HashNode, "{ \nfoo: 2, \nbar: 3 \n}")
+    end
+
+    def test_HashPatternNode
+      assert_location(HashPatternNode, "case foo; in bar: baz; end", 13...21) do |node|
+        node.conditions.first.pattern
+      end
+    end
+
+    def test_IfNode
+      assert_location(IfNode, "if type in 1;elsif type in B;end")
+    end
+
+    def test_ImaginaryNode
+      assert_location(ImaginaryNode, "1i")
+      assert_location(ImaginaryNode, "1ri")
+    end
+
+    def test_InNode
+      assert_location(InNode, "case foo; in bar; end", 10...16) do |node|
+        node.conditions.first
+      end
+    end
+
+    def test_InstanceVariableOperatorAndWriteNode
+      assert_location(InstanceVariableOperatorAndWriteNode, "@foo &&= bar")
+    end
+
+    def test_InstanceVariableOperatorWriteNode
+      assert_location(InstanceVariableOperatorWriteNode, "@foo += bar")
+    end
+
+    def test_InstanceVariableOperatorOrWriteNode
+      assert_location(InstanceVariableOperatorOrWriteNode, "@foo ||= bar")
+    end
+
+    def test_InstanceVariableReadNode
+      assert_location(InstanceVariableReadNode, "@foo")
+    end
+
+    def test_InstanceVariableWriteNode
+      assert_location(InstanceVariableWriteNode, "@foo = bar")
+    end
+
+    def test_IntegerNode
+      assert_location(IntegerNode, "0")
+      assert_location(IntegerNode, "1")
+      assert_location(IntegerNode, "1_000")
+      assert_location(IntegerNode, "0x1")
+      assert_location(IntegerNode, "0x1_000")
+      assert_location(IntegerNode, "0b1")
+      assert_location(IntegerNode, "0b1_000")
+      assert_location(IntegerNode, "0o1")
+      assert_location(IntegerNode, "0o1_000")
+    end
+
+    def test_InterpolatedRegularExpressionNode
+      assert_location(InterpolatedRegularExpressionNode, "/\#{foo}/")
+    end
+
+    def test_InterpolatedStringNode
+      assert_location(InterpolatedStringNode, "<<~A\nhello world\nA")
+    end
+
+    def test_InterpolatedSymbolNode
+      assert_location(InterpolatedSymbolNode, ':"#{foo}bar"')
+    end
+
+    def test_InterpolatedXStringNode
+      assert_location(InterpolatedXStringNode, '`foo #{bar} baz`')
+    end
+
+    def test_KeywordHashNode
+      assert_location(KeywordHashNode, "foo(a, b: 1)", 7...11) { |node| node.arguments.arguments[1] }
+    end
+
+    def test_KeywordParameterNode
+      assert_location(KeywordParameterNode, "def foo(bar:); end", 8...12) do |node|
+        node.parameters.keywords.first
+      end
+
+      assert_location(KeywordParameterNode, "def foo(bar: nil); end", 8...16) do |node|
+        node.parameters.keywords.first
+      end
+    end
+
+    def test_KeywordRestParameterNode
+      assert_location(KeywordRestParameterNode, "def foo(**); end", 8...10) do |node|
+        node.parameters.keyword_rest
+      end
+
+      assert_location(KeywordRestParameterNode, "def foo(**bar); end", 8...13) do |node|
+        node.parameters.keyword_rest
+      end
+    end
+
+    def test_LambdaNode
+      assert_location(LambdaNode, "-> { foo }")
+      assert_location(LambdaNode, "-> do foo end")
+    end
+
+    def test_LocalVariableOperatorAndWriteNode
+      assert_location(LocalVariableOperatorAndWriteNode, "foo &&= bar")
+      assert_location(LocalVariableOperatorAndWriteNode, "foo = 1; foo &&= bar", 9...20)
+    end
+
+    def test_LocalVariableOperatorWriteNode
+      assert_location(LocalVariableOperatorWriteNode, "foo += bar")
+      assert_location(LocalVariableOperatorWriteNode, "foo = 1; foo += bar", 9...19)
+    end
+
+    def test_LocalVariableOperatorOrWriteNode
+      assert_location(LocalVariableOperatorOrWriteNode, "foo ||= bar")
+      assert_location(LocalVariableOperatorOrWriteNode, "foo = 1; foo ||= bar", 9...20)
+    end
+
+    def test_LocalVariableReadNode
+      assert_location(LocalVariableReadNode, "foo = 1; foo", 9...12)
+    end
+
+    def test_LocalVariableWriteNode
+      assert_location(LocalVariableWriteNode, "foo = bar")
+    end
+
+    def test_MatchPredicateNode
+      assert_location(MatchPredicateNode, "foo in bar")
+    end
+
+    def test_MatchRequiredNode
+      assert_location(MatchRequiredNode, "foo => bar")
+    end
+
+    def test_ModuleNode
+      assert_location(ModuleNode, "module Foo end")
+    end
+
+    def test_MultiWriteNode
+      assert_location(MultiWriteNode, "foo, bar = baz")
+    end
+
+    def test_NextNode
+      assert_location(NextNode, "next")
+      assert_location(NextNode, "next foo")
+      assert_location(NextNode, "next foo, bar")
+      assert_location(NextNode, "next(foo)")
+    end
+
+    def test_NilNode
+      assert_location(NilNode, "nil")
+    end
+
+    def test_NoKeywordsParameterNode
+      assert_location(NoKeywordsParameterNode, "def foo(**nil); end", 8...13) { |node| node.parameters.keyword_rest }
+    end
+
+    def test_NumberedReferenceReadNode
+      assert_location(NumberedReferenceReadNode, "$1")
+    end
+
+    def test_OptionalParameterNode
+      assert_location(OptionalParameterNode, "def foo(bar = nil); end", 8...17) do |node|
+        node.parameters.optionals.first
+      end
+    end
+
+    def test_OrNode
+      assert_location(OrNode, "foo || bar")
+      assert_location(OrNode, "foo or bar")
+    end
+
+    def test_ParametersNode
+      assert_location(ParametersNode, "def foo(bar, baz); end", 8...16, &:parameters)
+    end
+
+    def test_ParenthesesNode
+      assert_location(ParenthesesNode, "()")
+      assert_location(ParenthesesNode, "(foo)")
+      assert_location(ParenthesesNode, "foo (bar), baz", 4...9) { |node| node.arguments.arguments.first }
+      assert_location(ParenthesesNode, "def (foo).bar; end", 4...9, &:receiver)
+    end
+
+    def test_PinnedExpressionNode
+      assert_location(PinnedExpressionNode, "foo in ^(bar)", 7...13, &:pattern)
+    end
+
+    def test_PinnedVariableNode
+      assert_location(PinnedVariableNode, "foo in ^bar", 7...11, &:pattern)
+    end
+
+    def test_PostExecutionNode
+      assert_location(PostExecutionNode, "END {}")
+      assert_location(PostExecutionNode, "END { foo }")
+    end
+
+    def test_PreExecutionNode
+      assert_location(PreExecutionNode, "BEGIN {}")
+      assert_location(PreExecutionNode, "BEGIN { foo }")
+    end
+
+    def test_RangeNode
+      assert_location(RangeNode, "1..2")
+      assert_location(RangeNode, "1...2")
+
+      assert_location(RangeNode, "..2")
+      assert_location(RangeNode, "...2")
+
+      assert_location(RangeNode, "1..")
+      assert_location(RangeNode, "1...")
+    end
+
+    def test_RationalNode
+      assert_location(RationalNode, "1r")
+      assert_location(RationalNode, "1.0r")
+    end
+
+    def test_RedoNode
+      assert_location(RedoNode, "redo")
+    end
+
+    def test_RegularExpressionNode
+      assert_location(RegularExpressionNode, "/foo/")
+    end
+
+    def test_RequiredParameterNode
+      assert_location(RequiredParameterNode, "def foo(bar); end", 8...11) do |node|
+        node.parameters.requireds.first
+      end
+    end
+
+    def test_RequiredDestructuredParameterNode
+      assert_location(RequiredDestructuredParameterNode, "def foo((bar)); end", 8...13) do |node|
+        node.parameters.requireds.first
+      end
+    end
+
+    def test_RescueNode
+      code = <<~RUBY
+      begin
+        body
+      rescue TypeError
+      rescue ArgumentError
+      end
+      RUBY
+      assert_location(RescueNode, code, 13...50) { |node| node.rescue_clause }
+      assert_location(RescueNode, code, 30...50) { |node| node.rescue_clause.consequent }
+    end
+
+    def test_RescueModifierNode
+      assert_location(RescueModifierNode, "foo rescue bar")
+    end
+
+    def test_RestParameterNode
+      assert_location(RestParameterNode, "def foo(*bar); end", 8...12) do |node|
+        node.parameters.rest
+      end
+    end
+
+    def test_RetryNode
+      assert_location(RetryNode, "retry")
+    end
+
+    def test_ReturnNode
+      assert_location(ReturnNode, "return")
+      assert_location(ReturnNode, "return foo")
+      assert_location(ReturnNode, "return foo, bar")
+      assert_location(ReturnNode, "return(foo)")
+    end
+
+    def test_SelfNode
+      assert_location(SelfNode, "self")
+    end
+
+    def test_SingletonClassNode
+      assert_location(SingletonClassNode, "class << self; end")
+    end
+
+    def test_SourceEncodingNode
+      assert_location(SourceEncodingNode, "__ENCODING__")
+    end
+
+    def test_SourceFileNode
+      assert_location(SourceFileNode, "__FILE__")
+    end
+
+    def test_SourceLineNode
+      assert_location(SourceLineNode, "__LINE__")
+    end
+
+    def test_SplatNode
+      assert_location(SplatNode, "*foo = bar", 0...4) { |node| node.targets.first }
+    end
+
+    def test_StatementsNode
+      assert_location(StatementsNode, "foo { 1 }", 6...7) { |node| node.block.statements }
+
+      assert_location(StatementsNode, "(1)", 1...2, &:statements)
+
+      assert_location(StatementsNode, "def foo; 1; end", 9...10, &:statements)
+      assert_location(StatementsNode, "def foo = 1", 10...11, &:statements)
+      assert_location(StatementsNode, "def foo; 1\n2; end", 9...12, &:statements)
+
+      assert_location(StatementsNode, "if foo; bar; end", 8...11, &:statements)
+      assert_location(StatementsNode, "foo if bar", 0...3, &:statements)
+
+      assert_location(StatementsNode, "if foo; foo; elsif bar; bar; end", 24...27) { |node| node.consequent.statements }
+      assert_location(StatementsNode, "if foo; foo; else; bar; end", 19...22) { |node| node.consequent.statements }
+
+      assert_location(StatementsNode, "unless foo; bar; end", 12...15, &:statements)
+      assert_location(StatementsNode, "foo unless bar", 0...3, &:statements)
+
+      assert_location(StatementsNode, "case; when foo; bar; end", 16...19) { |node| node.conditions.first.statements }
+
+      assert_location(StatementsNode, "while foo; bar; end", 11...14, &:statements)
+      assert_location(StatementsNode, "foo while bar", 0...3, &:statements)
+
+      assert_location(StatementsNode, "until foo; bar; end", 11...14, &:statements)
+      assert_location(StatementsNode, "foo until bar", 0...3, &:statements)
+
+      assert_location(StatementsNode, "for foo in bar; baz; end", 16...19, &:statements)
+
+      assert_location(StatementsNode, "begin; foo; end", 7...10, &:statements)
+      assert_location(StatementsNode, "begin; rescue; foo; end", 15...18) { |node| node.rescue_clause.statements }
+      assert_location(StatementsNode, "begin; ensure; foo; end", 15...18) { |node| node.ensure_clause.statements }
+      assert_location(StatementsNode, "begin; rescue; else; foo; end", 21...24) { |node| node.else_clause.statements }
+
+      assert_location(StatementsNode, "class Foo; foo; end", 11...14, &:statements)
+      assert_location(StatementsNode, "module Foo; foo; end", 12...15, &:statements)
+      assert_location(StatementsNode, "class << self; foo; end", 15...18, &:statements)
+
+      assert_location(StatementsNode, "-> { foo }", 5...8, &:statements)
+      assert_location(StatementsNode, "BEGIN { foo }", 8...11, &:statements)
+      assert_location(StatementsNode, "END { foo }", 6...9, &:statements)
+
+      assert_location(StatementsNode, "\"\#{foo}\"", 3...6) { |node| node.parts.first.statements }
+    end
+
+    def test_StringConcatNode
+      assert_location(StringConcatNode, '"foo" "bar"')
+    end
+
+    def test_StringNode
+      assert_location(StringNode, '"foo"')
+      assert_location(StringNode, '%q[foo]')
+    end
+
+    def test_SuperNode
+      assert_location(SuperNode, "super foo")
+      assert_location(SuperNode, "super foo, bar")
+
+      assert_location(SuperNode, "super()")
+      assert_location(SuperNode, "super(foo)")
+      assert_location(SuperNode, "super(foo, bar)")
+
+      assert_location(SuperNode, "super() {}")
+    end
+
+    def test_SymbolNode
+      assert_location(SymbolNode, ":foo")
+    end
+
+    def test_TrueNode
+      assert_location(TrueNode, "true")
+    end
+
+    def test_UndefNode
+      assert_location(UndefNode, "undef foo")
+      assert_location(UndefNode, "undef foo, bar")
+    end
+
+    def test_UnlessNode
+      assert_location(UnlessNode, "foo unless bar")
+      assert_location(UnlessNode, "unless bar; foo; end")
+    end
+
+    def test_UntilNode
+      assert_location(UntilNode, "foo = bar until baz")
+      assert_location(UntilNode, "until bar;baz;end")
+    end
+
+    def test_WhenNode
+      assert_location(WhenNode, "case foo; when bar; end", 10...18) { |node| node.conditions.first }
+    end
+
+    def test_WhileNode
+      assert_location(WhileNode, "foo = bar while foo != baz")
+      assert_location(WhileNode, "while a;bar;baz;end")
+    end
+
+    def test_XStringNode
+      assert_location(XStringNode, "`foo`")
+      assert_location(XStringNode, "%x[foo]")
+    end
+
+    def test_YieldNode
+      assert_location(YieldNode, "yield")
+      assert_location(YieldNode, "yield foo")
+      assert_location(YieldNode, "yield foo, bar")
+      assert_location(YieldNode, "yield(foo)")
+    end
+
+    private
+
+    def assert_location(kind, source, expected = 0...source.length)
+      YARP.parse(source) => ParseResult[comments: [], errors: [], value: node]
+
+      node => ProgramNode[statements: [*, node]]
+      node = yield node if block_given?
+
+      assert_kind_of kind, node
+      assert_equal expected.begin, node.location.start_offset
+      assert_equal expected.end, node.location.end_offset
+    end
+  end
+end
diff --git a/test/yarp/memsize_test.rb b/test/yarp/memsize_test.rb
new file mode 100644
index 0000000000..1a6c64f95e
--- /dev/null
+++ b/test/yarp/memsize_test.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class MemsizeTest < Test::Unit::TestCase
+  def test_memsize
+    result = YARP.memsize("2 + 3")
+
+    assert_equal 5, result[:length]
+    assert_kind_of Integer, result[:memsize]
+    assert_equal 6, result[:node_count]
+  end
+end
diff --git a/test/yarp/parse_test.rb b/test/yarp/parse_test.rb
new file mode 100644
index 0000000000..8934faf5c5
--- /dev/null
+++ b/test/yarp/parse_test.rb
@@ -0,0 +1,114 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class ParseTest < Test::Unit::TestCase
+  def test_Ruby_3_2_plus
+    assert_operator RUBY_VERSION, :>=, "3.2.0", "ParseTest requires Ruby 3.2+"
+  end
+
+  def test_empty_string
+    YARP.parse("") => YARP::ParseResult[value: YARP::ProgramNode[statements: YARP::StatementsNode[body: []]]]
+  end
+
+  known_failures = %w[
+    seattlerb/heredoc_nested.txt
+    seattlerb/pct_w_heredoc_interp_nested.txt
+  ]
+
+  # Because the filepath in SourceFileNodes is different from one maching to the
+  # next, PP.pp(sexp, +"", 79) can have different results: both the path itself
+  # and the line breaks based on the length of the path.
+  def normalize_printed(printed)
+    printed
+      .gsub(
+        /SourceFileNode \s*
+          \(\s* (\d+\.\.\.\d+) \s*\) \s*
+          \(\s* ("[^"]*")      \s*\)
+        /mx,
+        'SourceFileNode(\1)(\2)')
+      .gsub(__dir__, "")
+  end
+
+  def find_source_file_node(node)
+    if node.is_a?(YARP::SourceFileNode)
+      node
+    else
+      node && node.child_nodes.each do |child_node|
+        source_file_node = find_source_file_node(child_node)
+        return source_file_node if source_file_node
+      end
+    end
+  end
+
+  def test_parse_takes_file_path
+    filepath = "filepath.rb"
+    parsed_result = YARP.parse("def foo; __FILE__; end", filepath)
+
+    assert_equal filepath, find_source_file_node(parsed_result.value).filepath
+  end
+
+  Dir[File.expand_path("fixtures/**/*.txt", __dir__)].each do |filepath|
+    relative = filepath.delete_prefix("#{File.expand_path("fixtures", __dir__)}/")
+    next if known_failures.include?(relative)
+
+    snapshot = File.expand_path(File.join("snapshots", relative), __dir__)
+    directory = File.dirname(snapshot)
+    FileUtils.mkdir_p(directory) unless File.directory?(directory)
+
+    define_method "test_filepath_#{filepath}" do
+      # First, read the source from the filepath. Use binmode to avoid converting CRLF on Windows,
+      # and explicitly set the external encoding to UTF-8 to override the binmode default.
+      source = File.read(filepath, binmode: true, external_encoding: Encoding::UTF_8)
+
+      # Make sure that it can be correctly parsed by Ripper. If it can't, then we have a fixture
+      # that is invalid Ruby.
+      refute_nil Ripper.sexp_raw(source)
+
+      # Next, parse the source and print the value.
+      result = YARP.parse_file(filepath)
+      value = result.value
+      printed = normalize_printed(PP.pp(value, +"", 79))
+
+      # Next, assert that there were no errors during parsing.
+      assert_empty result.errors, value
+
+      if File.exist?(snapshot)
+        expected = File.read(snapshot)
+        normalized = normalize_printed(expected)
+        if expected != normalized
+          File.write(snapshot, normalized)
+          warn("Updated snapshot at #{snapshot}.")
+        end
+        # If the snapshot file exists, then assert that the printed value
+        # matches the snapshot.
+        assert_equal(normalized, printed)
+      else
+        # If the snapshot file does not yet exist, then write it out now.
+        File.write(snapshot, printed)
+        warn("Created snapshot at #{snapshot}.")
+      end
+
+      # Next, assert that the value can be serialized and deserialized without
+      # changing the shape of the tree.
+      assert_equal_nodes(value, YARP.load(source, YARP.dump(source, filepath)))
+
+      # Next, assert that the newlines are in the expected places.
+      expected_newlines = [0]
+      source.b.scan("\n") { expected_newlines << $~.offset(0)[0] }
+      assert_equal expected_newlines, YARP.newlines(source)
+
+      # Finally, assert that we can lex the source and get the same tokens as
+      # Ripper.
+      YARP.lex_compat(source) => { errors: [], value: tokens }
+
+      begin
+        YARP.lex_ripper(source).zip(tokens).each do |(ripper, yarp)|
+          assert_equal ripper, yarp
+        end
+      rescue SyntaxError
+        raise ArgumentError, "Test file has invalid syntax #{filepath}"
+      end
+    end
+  end
+end
diff --git a/test/yarp/regexp_test.rb b/test/yarp/regexp_test.rb
new file mode 100644
index 0000000000..3bad27019b
--- /dev/null
+++ b/test/yarp/regexp_test.rb
@@ -0,0 +1,187 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class RegexpTest < Test::Unit::TestCase
+  ##############################################################################
+  # These tests test the actual use case of extracting named capture groups
+  ##############################################################################
+
+  def test_named_captures_with_arrows
+    assert_equal(["foo"], YARP.named_captures("(?<foo>bar)"))
+  end
+
+  def test_named_captures_with_single_quotes
+    assert_equal(["foo"], YARP.named_captures("(?'foo'bar)"))
+  end
+
+  def test_nested_named_captures_with_arrows
+    assert_equal(["foo", "bar"], YARP.named_captures("(?<foo>(?<bar>baz))"))
+  end
+
+  def test_nested_named_captures_with_single_quotes
+    assert_equal(["foo", "bar"], YARP.named_captures("(?'foo'(?'bar'baz))"))
+  end
+
+  def test_allows_duplicate_named_captures
+    assert_equal(["foo", "foo"], YARP.named_captures("(?<foo>bar)(?<foo>baz)"))
+  end
+
+  def test_named_capture_inside_fake_range_quantifier
+    assert_equal(["foo"], YARP.named_captures("foo{1, (?<foo>2)}"))
+  end
+
+  ##############################################################################
+  # These tests test the rest of the AST. They are not exhaustive, but they
+  # should cover the most common cases. We test these to make sure we don't
+  # accidentally regress and stop being able to extract named captures.
+  ##############################################################################
+
+  def test_alternation
+    refute_nil(YARP.named_captures("foo|bar"))
+  end
+
+  def test_anchors
+    refute_nil(YARP.named_captures("^foo$"))
+  end
+
+  def test_any
+    refute_nil(YARP.named_captures("."))
+  end
+
+  def test_posix_character_classes
+    refute_nil(YARP.named_captures("[[:digit:]]"))
+  end
+
+  def test_negated_posix_character_classes
+    refute_nil(YARP.named_captures("[[:^digit:]]"))
+  end
+
+  def test_invalid_posix_character_classes_should_fall_back_to_regular_classes
+    refute_nil(YARP.named_captures("[[:foo]]"))
+  end
+
+  def test_character_sets
+    refute_nil(YARP.named_captures("[abc]"))
+  end
+
+  def test_nested_character_sets
+    refute_nil(YARP.named_captures("[[abc]]"))
+  end
+
+  def test_nested_character_sets_with_operators
+    refute_nil(YARP.named_captures("[[abc] && [def]]"))
+  end
+
+  def test_named_capture_inside_nested_character_set
+    assert_equal([], YARP.named_captures("[foo (?<foo>bar)]"))
+  end
+
+  def test_negated_character_sets
+    refute_nil(YARP.named_captures("[^abc]"))
+  end
+
+  def test_character_ranges
+    refute_nil(YARP.named_captures("[a-z]"))
+  end
+
+  def test_negated_character_ranges
+    refute_nil(YARP.named_captures("[^a-z]"))
+  end
+
+  def test_fake_named_captures_inside_character_sets
+    assert_equal([], YARP.named_captures("[a-z(?<foo>)]"))
+  end
+
+  def test_fake_named_capture_inside_character_set_with_escaped_ending
+    assert_equal([], YARP.named_captures("[a-z\\](?<foo>)]"))
+  end
+
+  def test_comments
+    refute_nil(YARP.named_captures("(?#foo)"))
+  end
+
+  def test_non_capturing_groups
+    refute_nil(YARP.named_captures("(?:foo)"))
+  end
+
+  def test_positive_lookaheads
+    refute_nil(YARP.named_captures("(?=foo)"))
+  end
+
+  def test_negative_lookaheads
+    refute_nil(YARP.named_captures("(?!foo)"))
+  end
+
+  def test_positive_lookbehinds
+    refute_nil(YARP.named_captures("(?<=foo)"))
+  end
+
+  def test_negative_lookbehinds
+    refute_nil(YARP.named_captures("(?<!foo)"))
+  end
+
+  def test_atomic_groups
+    refute_nil(YARP.named_captures("(?>foo)"))
+  end
+
+  def test_absence_operator
+    refute_nil(YARP.named_captures("(?~foo)"))
+  end
+
+  def test_conditional_expression_with_index
+    refute_nil(YARP.named_captures("(?(1)foo)"))
+  end
+
+  def test_conditional_expression_with_name
+    refute_nil(YARP.named_captures("(?(foo)bar)"))
+  end
+
+  def test_conditional_expression_with_group
+    refute_nil(YARP.named_captures("(?(<foo>)bar)"))
+  end
+
+  def test_options_on_groups
+    refute_nil(YARP.named_captures("(?imxdau:foo)"))
+  end
+
+  def test_options_on_groups_with_invalid_options
+    assert_nil(YARP.named_captures("(?z:bar)"))
+  end
+
+  def test_options_on_groups_getting_turned_off
+    refute_nil(YARP.named_captures("(?-imx:foo)"))
+  end
+
+  def test_options_on_groups_some_getting_turned_on_some_getting_turned_off
+    refute_nil(YARP.named_captures("(?im-x:foo)"))
+  end
+
+  def test_star_quantifier
+    refute_nil(YARP.named_captures("foo*"))
+  end
+
+  def test_plus_quantifier
+    refute_nil(YARP.named_captures("foo+"))
+  end
+
+  def test_question_mark_quantifier
+    refute_nil(YARP.named_captures("foo?"))
+  end
+
+  def test_endless_range_quantifier
+    refute_nil(YARP.named_captures("foo{1,}"))
+  end
+
+  def test_beginless_range_quantifier
+    refute_nil(YARP.named_captures("foo{,1}"))
+  end
+
+  def test_range_quantifier
+    refute_nil(YARP.named_captures("foo{1,2}"))
+  end
+
+  def test_fake_range_quantifier_because_of_spaces
+    refute_nil(YARP.named_captures("foo{1, 2}"))
+  end
+end
diff --git a/test/yarp/ripper_compat_test.rb b/test/yarp/ripper_compat_test.rb
new file mode 100644
index 0000000000..4350ba7f81
--- /dev/null
+++ b/test/yarp/ripper_compat_test.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+module YARP
+  class RipperCompatTest < Test::Unit::TestCase
+    def test_1_plus_2
+      assert_equivalent("1 + 2")
+    end
+
+    def test_2_minus_3
+      assert_equivalent("2 - 3")
+    end
+
+    private
+
+    def assert_equivalent(source)
+      assert_equal Ripper.sexp_raw(source), RipperCompat.sexp_raw(source)
+    end
+  end
+end
diff --git a/test/yarp/snapshots/alias.txt b/test/yarp/snapshots/alias.txt
new file mode 100644
index 0000000000..639311e64a
--- /dev/null
+++ b/test/yarp/snapshots/alias.txt
@@ -0,0 +1,74 @@
+ProgramNode(0...199)(
+  [],
+  StatementsNode(0...199)(
+    [AliasNode(0...15)(
+       SymbolNode(6...10)((6...7), (7...10), nil, "foo"),
+       SymbolNode(11...15)((11...12), (12...15), nil, "bar"),
+       (0...5)
+     ),
+     AliasNode(17...38)(
+       SymbolNode(23...30)((23...26), (26...29), (29...30), "abc"),
+       SymbolNode(31...38)((31...34), (34...37), (37...38), "def"),
+       (17...22)
+     ),
+     AliasNode(40...59)(
+       SymbolNode(46...52)((46...48), (48...51), (51...52), "abc"),
+       SymbolNode(53...59)((53...55), (55...58), (58...59), "def"),
+       (40...45)
+     ),
+     AliasNode(61...84)(
+       InterpolatedSymbolNode(67...77)(
+         (67...69),
+         [StringNode(69...72)(nil, (69...72), nil, "abc"),
+          EmbeddedStatementsNode(72...76)(
+            (72...74),
+            StatementsNode(74...75)([IntegerNode(74...75)()]),
+            (75...76)
+          )],
+         (76...77)
+       ),
+       SymbolNode(78...84)((78...80), (80...83), (83...84), "def"),
+       (61...66)
+     ),
+     AliasNode(86...97)(
+       GlobalVariableReadNode(92...94)(),
+       BackReferenceReadNode(95...97)(),
+       (86...91)
+     ),
+     AliasNode(99...112)(
+       SymbolNode(105...108)(nil, (105...108), nil, "foo"),
+       SymbolNode(109...112)(nil, (109...112), nil, "bar"),
+       (99...104)
+     ),
+     AliasNode(114...129)(
+       GlobalVariableReadNode(120...124)(),
+       GlobalVariableReadNode(125...129)(),
+       (114...119)
+     ),
+     AliasNode(131...143)(
+       SymbolNode(137...140)(nil, (137...140), nil, "foo"),
+       SymbolNode(141...143)(nil, (141...143), nil, "if"),
+       (131...136)
+     ),
+     AliasNode(145...158)(
+       SymbolNode(151...154)(nil, (151...154), nil, "foo"),
+       SymbolNode(155...158)(nil, (155...158), nil, "<=>"),
+       (145...150)
+     ),
+     AliasNode(160...175)(
+       SymbolNode(166...169)((166...167), (167...169), nil, "=="),
+       SymbolNode(170...175)((170...171), (171...175), nil, "eql?"),
+       (160...165)
+     ),
+     AliasNode(177...186)(
+       SymbolNode(183...184)(nil, (183...184), nil, "A"),
+       SymbolNode(185...186)(nil, (185...186), nil, "B"),
+       (177...182)
+     ),
+     AliasNode(188...199)(
+       SymbolNode(194...196)((194...195), (195...196), nil, "A"),
+       SymbolNode(197...199)((197...198), (198...199), nil, "B"),
+       (188...193)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/arithmetic.txt b/test/yarp/snapshots/arithmetic.txt
new file mode 100644
index 0000000000..7de7a714b6
--- /dev/null
+++ b/test/yarp/snapshots/arithmetic.txt
@@ -0,0 +1,107 @@
+ProgramNode(0...39)(
+  [],
+  StatementsNode(0...39)(
+    [CallNode(0...8)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...8)(
+         [CallNode(4...8)(
+            CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "bar"),
+            nil,
+            (4...5),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "!"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(10...18)(
+       CallNode(10...14)(
+         CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (10...11),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "-@"
+       ),
+       nil,
+       (14...15),
+       nil,
+       ArgumentsNode(15...18)(
+         [CallNode(15...18)(nil, nil, (15...18), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "*"
+     ),
+     CallNode(20...29)(
+       CallNode(20...24)(
+         CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (20...21),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "+@"
+       ),
+       nil,
+       (24...26),
+       nil,
+       ArgumentsNode(26...29)(
+         [CallNode(26...29)(nil, nil, (26...29), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "**"
+     ),
+     CallNode(31...39)(
+       nil,
+       nil,
+       (31...34),
+       nil,
+       ArgumentsNode(35...39)(
+         [CallNode(35...39)(
+            CallNode(36...39)(
+              nil,
+              nil,
+              (36...39),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            nil,
+            (35...36),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "~"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/arrays.txt b/test/yarp/snapshots/arrays.txt
new file mode 100644
index 0000000000..1f0360f965
--- /dev/null
+++ b/test/yarp/snapshots/arrays.txt
@@ -0,0 +1,696 @@
+ProgramNode(0...502)(
+  [],
+  StatementsNode(0...502)(
+    [ArrayNode(0...4)(
+       [SplatNode(1...3)(
+          (1...2),
+          CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "a")
+        )],
+       (0...1),
+       (3...4)
+     ),
+     CallNode(6...29)(
+       CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (9...19),
+       (9...10),
+       ArgumentsNode(10...29)(
+         [CallNode(10...13)(nil, nil, (10...13), nil, nil, nil, nil, 0, "bar"),
+          CallNode(15...18)(nil, nil, (15...18), nil, nil, nil, nil, 0, "baz"),
+          ArrayNode(22...29)(
+            [IntegerNode(22...23)(),
+             IntegerNode(25...26)(),
+             IntegerNode(28...29)()],
+            nil,
+            nil
+          )]
+       ),
+       (18...19),
+       nil,
+       0,
+       "[]="
+     ),
+     ArrayNode(31...44)(
+       [KeywordHashNode(32...43)(
+          [AssocNode(32...43)(
+             SymbolNode(32...34)(nil, (32...33), (33...34), "a"),
+             ArrayNode(35...43)(
+               [SymbolNode(36...38)((36...37), (37...38), nil, "b"),
+                SymbolNode(40...42)((40...41), (41...42), nil, "c")],
+               (35...36),
+               (42...43)
+             ),
+             nil
+           )]
+        )],
+       (31...32),
+       (43...44)
+     ),
+     ArrayNode(48...71)(
+       [SymbolNode(49...51)((49...50), (50...51), nil, "a"),
+        SymbolNode(53...55)((53...54), (54...55), nil, "b"),
+        SymbolNode(57...59)((57...58), (58...59), nil, "c"),
+        IntegerNode(60...61)(),
+        SymbolNode(66...68)((66...67), (67...68), nil, "d")],
+       (48...49),
+       (70...71)
+     ),
+     ArrayNode(74...98)(
+       [SymbolNode(75...77)((75...76), (76...77), nil, "a"),
+        SymbolNode(79...81)((79...80), (80...81), nil, "b"),
+        SymbolNode(83...85)((83...84), (84...85), nil, "c"),
+        IntegerNode(86...87)(),
+        SymbolNode(92...94)((92...93), (93...94), nil, "d")],
+       (74...75),
+       (97...98)
+     ),
+     ArrayNode(100...112)(
+       [KeywordHashNode(101...111)(
+          [AssocNode(101...111)(
+             CallNode(101...104)(
+               nil,
+               nil,
+               (101...104),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "foo"
+             ),
+             CallNode(108...111)(
+               nil,
+               nil,
+               (108...111),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             ),
+             (105...107)
+           )]
+        )],
+       (100...101),
+       (111...112)
+     ),
+     CallNode(114...133)(
+       CallNode(114...122)(
+         CallNode(114...117)(
+           nil,
+           nil,
+           (114...117),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         nil,
+         (117...122),
+         (117...118),
+         ArgumentsNode(118...121)(
+           [CallNode(118...121)(
+              nil,
+              nil,
+              (118...121),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (121...122),
+         nil,
+         0,
+         "[]"
+       ),
+       nil,
+       (122...127),
+       (122...123),
+       ArgumentsNode(123...133)(
+         [CallNode(123...126)(
+            nil,
+            nil,
+            (123...126),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "baz"
+          ),
+          CallNode(130...133)(
+            nil,
+            nil,
+            (130...133),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "qux"
+          )]
+       ),
+       (126...127),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(135...148)(
+       CallNode(135...143)(
+         CallNode(135...138)(
+           nil,
+           nil,
+           (135...138),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         nil,
+         (138...143),
+         (138...139),
+         ArgumentsNode(139...142)(
+           [CallNode(139...142)(
+              nil,
+              nil,
+              (139...142),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (142...143),
+         nil,
+         0,
+         "[]"
+       ),
+       nil,
+       (143...148),
+       (143...144),
+       ArgumentsNode(144...147)(
+         [CallNode(144...147)(
+            nil,
+            nil,
+            (144...147),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "baz"
+          )]
+       ),
+       (147...148),
+       nil,
+       0,
+       "[]"
+     ),
+     ArrayNode(150...153)([], (150...151), (152...153)),
+     CallNode(155...168)(
+       CallNode(155...158)(
+         nil,
+         nil,
+         (155...158),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (158...168),
+       (158...159),
+       ArgumentsNode(159...167)(
+         [CallNode(159...162)(
+            nil,
+            nil,
+            (159...162),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          ),
+          CallNode(164...167)(
+            nil,
+            nil,
+            (164...167),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "baz"
+          )]
+       ),
+       (167...168),
+       nil,
+       0,
+       "[]"
+     ),
+     CallNode(170...189)(
+       CallNode(170...173)(
+         nil,
+         nil,
+         (170...173),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (173...183),
+       (173...174),
+       ArgumentsNode(174...189)(
+         [CallNode(174...177)(
+            nil,
+            nil,
+            (174...177),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          ),
+          CallNode(179...182)(
+            nil,
+            nil,
+            (179...182),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "baz"
+          ),
+          CallNode(186...189)(
+            nil,
+            nil,
+            (186...189),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "qux"
+          )]
+       ),
+       (182...183),
+       nil,
+       0,
+       "[]="
+     ),
+     MultiWriteNode(191...212)(
+       [CallNode(191...197)(
+          CallNode(191...194)(
+            nil,
+            nil,
+            (191...194),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "foo"
+          ),
+          nil,
+          (194...197),
+          (194...195),
+          ArgumentsNode(195...196)([IntegerNode(195...196)()]),
+          (196...197),
+          nil,
+          0,
+          "[]="
+        ),
+        CallNode(199...205)(
+          CallNode(199...202)(
+            nil,
+            nil,
+            (199...202),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          ),
+          nil,
+          (202...205),
+          (202...203),
+          ArgumentsNode(203...204)([IntegerNode(203...204)()]),
+          (204...205),
+          nil,
+          0,
+          "[]="
+        )],
+       (206...207),
+       ArrayNode(208...212)(
+         [IntegerNode(208...209)(), IntegerNode(211...212)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     ),
+     CallNode(214...233)(
+       CallNode(214...217)(
+         nil,
+         nil,
+         (214...217),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (217...233),
+       (217...218),
+       ArgumentsNode(218...232)(
+         [CallNode(218...232)(
+            CallNode(218...221)(
+              nil,
+              nil,
+              (218...221),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            nil,
+            (221...226),
+            (221...222),
+            ArgumentsNode(222...232)(
+              [CallNode(222...225)(
+                 nil,
+                 nil,
+                 (222...225),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "baz"
+               ),
+               CallNode(229...232)(
+                 nil,
+                 nil,
+                 (229...232),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "qux"
+               )]
+            ),
+            (225...226),
+            nil,
+            0,
+            "[]="
+          )]
+       ),
+       (232...233),
+       nil,
+       0,
+       "[]"
+     ),
+     CallNode(235...243)(
+       CallNode(235...238)(
+         nil,
+         nil,
+         (235...238),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (238...243),
+       (238...239),
+       ArgumentsNode(239...242)(
+         [CallNode(239...242)(
+            nil,
+            nil,
+            (239...242),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       (242...243),
+       nil,
+       0,
+       "[]"
+     ),
+     CallNode(245...259)(
+       CallNode(245...248)(
+         nil,
+         nil,
+         (245...248),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
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+       (366...367)
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+       (372...385),
+       (385...386),
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+       (405...406)
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+       (424...425)
+     ),
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+       (430...443),
+       (443...444),
+       "one two three"
+     ),
+     ArrayNode(447...464)(
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+        SymbolNode(454...457)(nil, (454...457), nil, "two"),
+        SymbolNode(458...463)(nil, (458...463), nil, "three")],
+       (447...450),
+       (463...464)
+     ),
+     ArrayNode(466...483)(
+       [StringNode(469...472)(nil, (469...472), nil, "one"),
+        StringNode(473...476)(nil, (473...476), nil, "two"),
+        StringNode(477...482)(nil, (477...482), nil, "three")],
+       (466...469),
+       (482...483)
+     ),
+     XStringNode(485...502)(
+       (485...488),
+       (488...501),
+       (501...502),
+       "one two three"
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+  )
+)
diff --git a/test/yarp/snapshots/begin_ensure.txt b/test/yarp/snapshots/begin_ensure.txt
new file mode 100644
index 0000000000..b82cf6a007
--- /dev/null
+++ b/test/yarp/snapshots/begin_ensure.txt
@@ -0,0 +1,69 @@
+ProgramNode(0...94)(
+  [],
+  StatementsNode(0...94)(
+    [BeginNode(0...20)(
+       (0...5),
+       StatementsNode(6...7)(
+         [CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       EnsureNode(8...20)(
+         (8...14),
+         StatementsNode(15...16)(
+           [CallNode(15...16)(nil, nil, (15...16), nil, nil, nil, nil, 0, "b")]
+         ),
+         (17...20)
+       ),
+       (17...20)
+     ),
+     BeginNode(22...46)(
+       (22...27),
+       StatementsNode(29...30)(
+         [CallNode(29...30)(nil, nil, (29...30), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       EnsureNode(32...46)(
+         (32...38),
+         StatementsNode(40...41)(
+           [CallNode(40...41)(nil, nil, (40...41), nil, nil, nil, nil, 0, "b")]
+         ),
+         (43...46)
+       ),
+       (43...46)
+     ),
+     BeginNode(48...70)(
+       (48...53),
+       StatementsNode(54...55)(
+         [CallNode(54...55)(nil, nil, (54...55), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       EnsureNode(57...70)(
+         (57...63),
+         StatementsNode(64...65)(
+           [CallNode(64...65)(nil, nil, (64...65), nil, nil, nil, nil, 0, "b")]
+         ),
+         (67...70)
+       ),
+       (67...70)
+     ),
+     BeginNode(72...94)(
+       (72...77),
+       StatementsNode(78...79)(
+         [CallNode(78...79)(nil, nil, (78...79), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       EnsureNode(81...94)(
+         (81...87),
+         StatementsNode(88...89)(
+           [CallNode(88...89)(nil, nil, (88...89), nil, nil, nil, nil, 0, "b")]
+         ),
+         (91...94)
+       ),
+       (91...94)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/begin_rescue.txt b/test/yarp/snapshots/begin_rescue.txt
new file mode 100644
index 0000000000..7c8b139dce
--- /dev/null
+++ b/test/yarp/snapshots/begin_rescue.txt
@@ -0,0 +1,595 @@
+ProgramNode(0...578)(
+  [:ex],
+  StatementsNode(0...578)(
+    [BeginNode(0...33)(
+       (0...5),
+       StatementsNode(7...8)(
+         [CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "a")]
+       ),
+       RescueNode(10...19)(
+         (10...16),
+         [],
+         nil,
+         nil,
+         StatementsNode(18...19)(
+           [CallNode(18...19)(nil, nil, (18...19), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil
+       ),
+       ElseNode(21...33)(
+         (21...25),
+         StatementsNode(27...28)(
+           [CallNode(27...28)(nil, nil, (27...28), nil, nil, nil, nil, 0, "c")]
+         ),
+         (30...33)
+       ),
+       nil,
+       (30...33)
+     ),
+     BeginNode(35...79)(
+       (35...40),
+       StatementsNode(42...43)(
+         [CallNode(42...43)(nil, nil, (42...43), nil, nil, nil, nil, 0, "a")]
+       ),
+       RescueNode(45...54)(
+         (45...51),
+         [],
+         nil,
+         nil,
+         StatementsNode(53...54)(
+           [CallNode(53...54)(nil, nil, (53...54), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil
+       ),
+       ElseNode(56...71)(
+         (56...60),
+         StatementsNode(62...63)(
+           [CallNode(62...63)(nil, nil, (62...63), nil, nil, nil, nil, 0, "c")]
+         ),
+         (65...71)
+       ),
+       EnsureNode(65...79)(
+         (65...71),
+         StatementsNode(73...74)(
+           [CallNode(73...74)(nil, nil, (73...74), nil, nil, nil, nil, 0, "d")]
+         ),
+         (76...79)
+       ),
+       (76...79)
+     ),
+     BeginNode(81...92)(
+       (81...86),
+       StatementsNode(87...88)(
+         [CallNode(87...88)(nil, nil, (87...88), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       nil,
+       (89...92)
+     ),
+     BeginNode(94...107)(
+       (94...99),
+       StatementsNode(101...102)(
+         [CallNode(101...102)(
+            nil,
+            nil,
+            (101...102),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       nil,
+       nil,
+       nil,
+       (104...107)
+     ),
+     BeginNode(109...121)(
+       (109...114),
+       StatementsNode(115...116)(
+         [CallNode(115...116)(
+            nil,
+            nil,
+            (115...116),
+            nil,
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+            nil,
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+            0,
+            "a"
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+       nil,
+       nil,
+       (118...121)
+     ),
+     BeginNode(123...135)(
+       (123...128),
+       StatementsNode(129...130)(
+         [CallNode(129...130)(
+            nil,
+            nil,
+            (129...130),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       nil,
+       nil,
+       nil,
+       (132...135)
+     ),
+     BeginNode(137...175)(
+       (137...142),
+       StatementsNode(143...144)(
+         [CallNode(143...144)(
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+            nil,
+            (143...144),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
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+       ),
+       RescueNode(145...171)(
+         (145...151),
+         [],
+         nil,
+         nil,
+         StatementsNode(152...153)(
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+              nil,
+              nil,
+              (152...153),
+              nil,
+              nil,
+              nil,
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+              0,
+              "b"
+            )]
+         ),
+         RescueNode(154...171)(
+           (154...160),
+           [],
+           nil,
+           nil,
+           StatementsNode(161...162)(
+             [CallNode(161...162)(
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+                nil,
+                (161...162),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
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+              )]
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+           RescueNode(163...171)(
+             (163...169),
+             [],
+             nil,
+             nil,
+             StatementsNode(170...171)(
+               [CallNode(170...171)(
+                  nil,
+                  nil,
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+                  nil,
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+                  0,
+                  "d"
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+             ),
+             nil
+           )
+         )
+       ),
+       nil,
+       nil,
+       (172...175)
+     ),
+     BeginNode(177...269)(
+       (177...182),
+       StatementsNode(185...186)(
+         [CallNode(185...186)(
+            nil,
+            nil,
+            (185...186),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(187...265)(
+         (187...193),
+         [ConstantReadNode(194...203)()],
+         (204...206),
+         LocalVariableWriteNode(207...209)(:ex, 0, nil, (207...209), nil),
+         StatementsNode(212...213)(
+           [CallNode(212...213)(
+              nil,
+              nil,
+              (212...213),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         RescueNode(214...265)(
+           (214...220),
+           [ConstantReadNode(221...237)(), ConstantReadNode(239...255)()],
+           (256...258),
+           LocalVariableWriteNode(259...261)(:ex, 0, nil, (259...261), nil),
+           StatementsNode(264...265)(
+             [CallNode(264...265)(
+                nil,
+                nil,
+                (264...265),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "c"
+              )]
+           ),
+           nil
+         )
+       ),
+       nil,
+       nil,
+       (266...269)
+     ),
+     BeginNode(271...322)(
+       (271...276),
+       StatementsNode(279...280)(
+         [CallNode(279...280)(
+            nil,
+            nil,
+            (279...280),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(281...307)(
+         (281...287),
+         [ConstantReadNode(288...297)()],
+         (298...300),
+         LocalVariableWriteNode(301...303)(:ex, 0, nil, (301...303), nil),
+         StatementsNode(306...307)(
+           [CallNode(306...307)(
+              nil,
+              nil,
+              (306...307),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       EnsureNode(308...322)(
+         (308...314),
+         StatementsNode(317...318)(
+           [CallNode(317...318)(
+              nil,
+              nil,
+              (317...318),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (319...322)
+       ),
+       (319...322)
+     ),
+     StringNode(324...330)((324...326), (326...329), (329...330), "abc"),
+     BeginNode(332...352)(
+       (332...337),
+       StatementsNode(338...339)(
+         [CallNode(338...339)(
+            nil,
+            nil,
+            (338...339),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(340...348)(
+         (340...346),
+         [],
+         nil,
+         nil,
+         StatementsNode(347...348)(
+           [CallNode(347...348)(
+              nil,
+              nil,
+              (347...348),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (349...352)
+     ),
+     BeginNode(354...374)(
+       (354...359),
+       StatementsNode(360...361)(
+         [CallNode(360...361)(
+            nil,
+            nil,
+            (360...361),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(362...370)(
+         (362...368),
+         [],
+         nil,
+         nil,
+         StatementsNode(369...370)(
+           [CallNode(369...370)(
+              nil,
+              nil,
+              (369...370),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (371...374)
+     ),
+     BeginNode(376...396)(
+       (376...381),
+       StatementsNode(382...383)(
+         [CallNode(382...383)(
+            nil,
+            nil,
+            (382...383),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(384...392)(
+         (384...390),
+         [],
+         nil,
+         nil,
+         StatementsNode(391...392)(
+           [CallNode(391...392)(
+              nil,
+              nil,
+              (391...392),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (393...396)
+     ),
+     BeginNode(398...428)(
+       (398...403),
+       StatementsNode(404...405)(
+         [CallNode(404...405)(
+            nil,
+            nil,
+            (404...405),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(406...424)(
+         (406...412),
+         [ConstantReadNode(413...422)()],
+         nil,
+         nil,
+         StatementsNode(423...424)(
+           [CallNode(423...424)(
+              nil,
+              nil,
+              (423...424),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (425...428)
+     ),
+     BeginNode(430...477)(
+       (430...435),
+       StatementsNode(436...437)(
+         [CallNode(436...437)(
+            nil,
+            nil,
+            (436...437),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(438...473)(
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+         [ConstantReadNode(445...454)(), ConstantReadNode(456...471)()],
+         nil,
+         nil,
+         StatementsNode(472...473)(
+           [CallNode(472...473)(
+              nil,
+              nil,
+              (472...473),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (474...477)
+     ),
+     BeginNode(479...536)(
+       (479...484),
+       StatementsNode(487...488)(
+         [CallNode(487...488)(
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+            nil,
+            (487...488),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
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+       ),
+       RescueNode(489...532)(
+         (489...495),
+         [ConstantReadNode(496...505)(), ConstantReadNode(507...522)()],
+         (523...525),
+         LocalVariableWriteNode(526...528)(:ex, 0, nil, (526...528), nil),
+         StatementsNode(531...532)(
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+              nil,
+              (531...532),
+              nil,
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+              nil,
+              nil,
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+              "b"
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+       nil,
+       nil,
+       (533...536)
+     ),
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+       (538...543),
+       StatementsNode(546...547)(
+         [CallNode(546...547)(
+            nil,
+            nil,
+            (546...547),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(548...574)(
+         (548...554),
+         [ConstantReadNode(555...564)()],
+         (565...567),
+         LocalVariableWriteNode(568...570)(:ex, 0, nil, (568...570), nil),
+         StatementsNode(573...574)(
+           [CallNode(573...574)(
+              nil,
+              nil,
+              (573...574),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (575...578)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/blocks.txt b/test/yarp/snapshots/blocks.txt
new file mode 100644
index 0000000000..4fcbaace14
--- /dev/null
+++ b/test/yarp/snapshots/blocks.txt
@@ -0,0 +1,621 @@
+ProgramNode(0...402)(
+  [:fork],
+  StatementsNode(0...402)(
+    [CallNode(0...16)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (3...8),
+       (3...4),
+       ArgumentsNode(4...7)(
+         [CallNode(4...7)(nil, nil, (4...7), nil, nil, nil, nil, 0, "bar")]
+       ),
+       (7...8),
+       BlockNode(9...16)(
+         [],
+         nil,
+         StatementsNode(11...14)(
+           [CallNode(11...14)(
+              nil,
+              nil,
+              (11...14),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (9...10),
+         (15...16)
+       ),
+       0,
+       "[]"
+     ),
+     CallNode(18...37)(
+       CallNode(18...21)(nil, nil, (18...21), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (21...26),
+       (21...22),
+       ArgumentsNode(22...25)(
+         [CallNode(22...25)(nil, nil, (22...25), nil, nil, nil, nil, 0, "bar")]
+       ),
+       (25...26),
+       BlockNode(27...37)(
+         [],
+         nil,
+         StatementsNode(30...33)(
+           [CallNode(30...33)(
+              nil,
+              nil,
+              (30...33),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (27...29),
+         (34...37)
+       ),
+       0,
+       "[]"
+     ),
+     CallNode(39...74)(
+       CallNode(39...40)(nil, nil, (39...40), nil, nil, nil, nil, 0, "x"),
+       (40...41),
+       (41...47),
+       (47...48),
+       ArgumentsNode(48...49)([IntegerNode(48...49)()]),
+       (49...50),
+       BlockNode(51...74)(
+         [:x, :memo],
+         BlockParametersNode(53...62)(
+           ParametersNode(54...61)(
+             [RequiredParameterNode(54...55)(:x),
+              RequiredParameterNode(57...61)(:memo)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (53...54),
+           (61...62)
+         ),
+         StatementsNode(63...72)(
+           [LocalVariableOperatorWriteNode(63...72)(
+              (63...67),
+              (68...70),
+              LocalVariableReadNode(71...72)(:x, 0),
+              :memo,
+              :+
+            )]
+         ),
+         (51...52),
+         (73...74)
+       ),
+       0,
+       "reduce"
+     ),
+     CallNode(76...86)(
+       nil,
+       nil,
+       (76...79),
+       nil,
+       nil,
+       nil,
+       BlockNode(80...86)([], nil, nil, (80...82), (83...86)),
+       0,
+       "foo"
+     ),
+     CallNode(88...109)(
+       nil,
+       nil,
+       (88...91),
+       nil,
+       ArgumentsNode(92...109)(
+         [CallNode(92...95)(nil, nil, (92...95), nil, nil, nil, nil, 0, "bar"),
+          ParenthesesNode(97...109)(
+            StatementsNode(98...108)(
+              [CallNode(98...108)(
+                 nil,
+                 nil,
+                 (98...101),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(102...108)([], nil, nil, (102...104), (105...108)),
+                 0,
+                 "baz"
+               )]
+            ),
+            (97...98),
+            (108...109)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(111...125)(
+       nil,
+       nil,
+       (111...114),
+       nil,
+       ArgumentsNode(115...118)(
+         [CallNode(115...118)(
+            nil,
+            nil,
+            (115...118),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       nil,
+       BlockNode(119...125)([], nil, nil, (119...121), (122...125)),
+       0,
+       "foo"
+     ),
+     CallNode(127...145)(
+       nil,
+       nil,
+       (127...130),
+       nil,
+       ArgumentsNode(131...138)(
+         [CallNode(131...138)(
+            nil,
+            nil,
+            (131...134),
+            nil,
+            ArgumentsNode(135...138)(
+              [CallNode(135...138)(
+                 nil,
+                 nil,
+                 (135...138),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "baz"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       nil,
+       BlockNode(139...145)([], nil, nil, (139...141), (142...145)),
+       0,
+       "foo"
+     ),
+     CallNode(147...168)(
+       nil,
+       nil,
+       (147...150),
+       nil,
+       nil,
+       nil,
+       BlockNode(151...168)(
+         [:a],
+         BlockParametersNode(154...164)(
+           ParametersNode(155...163)(
+             [],
+             [OptionalParameterNode(155...163)(
+                :a,
+                (155...156),
+                (157...158),
+                CallNode(159...163)(
+                  CallNode(159...160)(
+                    nil,
+                    nil,
+                    (159...160),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "b"
+                  ),
+                  nil,
+                  (160...163),
+                  (160...161),
+                  ArgumentsNode(161...162)([IntegerNode(161...162)()]),
+                  (162...163),
+                  nil,
+                  0,
+                  "[]"
+                )
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (154...155),
+           (163...164)
+         ),
+         nil,
+         (151...153),
+         (165...168)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(170...187)(
+       nil,
+       nil,
+       (170...173),
+       nil,
+       nil,
+       nil,
+       BlockNode(174...187)(
+         [],
+         nil,
+         BeginNode(177...187)(
+           nil,
+           nil,
+           RescueNode(177...183)((177...183), [], nil, nil, nil, nil),
+           nil,
+           nil,
+           (184...187)
+         ),
+         (174...176),
+         (184...187)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(189...233)(
+       nil,
+       nil,
+       (189...192),
+       nil,
+       nil,
+       nil,
+       BlockNode(193...233)(
+         [],
+         nil,
+         StatementsNode(198...229)(
+           [CallNode(198...229)(
+              nil,
+              nil,
+              (198...201),
+              nil,
+              nil,
+              nil,
+              BlockNode(202...229)(
+                [],
+                nil,
+                StatementsNode(209...223)(
+                  [CallNode(209...223)(
+                     nil,
+                     nil,
+                     (209...212),
+                     nil,
+                     nil,
+                     nil,
+                     BlockNode(213...223)(
+                       [],
+                       nil,
+                       nil,
+                       (213...215),
+                       (220...223)
+                     ),
+                     0,
+                     "baz"
+                   )]
+                ),
+                (202...204),
+                (226...229)
+              ),
+              0,
+              "bar"
+            )]
+         ),
+         (193...195),
+         (230...233)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(235...251)(
+       CallNode(235...238)(
+         nil,
+         nil,
+         (235...238),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (238...243),
+       (238...239),
+       ArgumentsNode(239...242)(
+         [CallNode(239...242)(
+            nil,
+            nil,
+            (239...242),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       (242...243),
+       BlockNode(244...251)(
+         [],
+         nil,
+         StatementsNode(246...249)(
+           [CallNode(246...249)(
+              nil,
+              nil,
+              (246...249),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (244...245),
+         (250...251)
+       ),
+       0,
+       "[]"
+     ),
+     CallNode(253...277)(
+       nil,
+       nil,
+       (253...256),
+       nil,
+       nil,
+       nil,
+       BlockNode(257...277)(
+         [:x, :y, :z],
+         BlockParametersNode(259...273)(
+           ParametersNode(260...272)(
+             [RequiredParameterNode(260...261)(:x)],
+             [OptionalParameterNode(263...268)(
+                :y,
+                (263...264),
+                (265...266),
+                IntegerNode(267...268)()
+              )],
+             [],
+             nil,
+             [KeywordParameterNode(270...272)((270...272), nil)],
+             nil,
+             nil
+           ),
+           [],
+           (259...260),
+           (272...273)
+         ),
+         StatementsNode(274...275)([LocalVariableReadNode(274...275)(:x, 0)]),
+         (257...258),
+         (276...277)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(279...290)(
+       nil,
+       nil,
+       (279...282),
+       nil,
+       nil,
+       nil,
+       BlockNode(283...290)(
+         [:x],
+         BlockParametersNode(285...288)(
+           ParametersNode(286...287)(
+             [RequiredParameterNode(286...287)(:x)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (285...286),
+           (287...288)
+         ),
+         nil,
+         (283...284),
+         (289...290)
+       ),
+       0,
+       "foo"
+     ),
+     LocalVariableWriteNode(292...300)(
+       :fork,
+       0,
+       IntegerNode(299...300)(),
+       (292...296),
+       (297...298)
+     ),
+     CallNode(301...316)(
+       nil,
+       nil,
+       (301...305),
+       nil,
+       nil,
+       nil,
+       BlockNode(306...316)(
+         [:a],
+         BlockParametersNode(309...312)(
+           ParametersNode(310...311)(
+             [RequiredParameterNode(310...311)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (309...310),
+           (311...312)
+         ),
+         nil,
+         (306...308),
+         (313...316)
+       ),
+       0,
+       "fork"
+     ),
+     CallNode(318...330)(
+       nil,
+       nil,
+       (318...322),
+       nil,
+       nil,
+       nil,
+       BlockNode(323...330)(
+         [:a],
+         BlockParametersNode(325...328)(
+           ParametersNode(326...327)(
+             [RequiredParameterNode(326...327)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (325...326),
+           (327...328)
+         ),
+         nil,
+         (323...324),
+         (329...330)
+       ),
+       0,
+       "fork"
+     ),
+     CallNode(332...340)(
+       nil,
+       nil,
+       (332...333),
+       nil,
+       nil,
+       nil,
+       BlockNode(334...340)([], nil, nil, (334...336), (337...340)),
+       0,
+       "C"
+     ),
+     CallNode(342...346)(
+       nil,
+       nil,
+       (342...343),
+       nil,
+       nil,
+       nil,
+       BlockNode(344...346)([], nil, nil, (344...345), (345...346)),
+       0,
+       "C"
+     ),
+     CallNode(348...383)(
+       nil,
+       nil,
+       (348...351),
+       nil,
+       ArgumentsNode(352...383)(
+         [CallNode(352...383)(
+            nil,
+            nil,
+            (352...358),
+            nil,
+            nil,
+            nil,
+            BlockNode(359...383)(
+              [:a, :b],
+              BlockParametersNode(361...381)(
+                ParametersNode(365...377)(
+                  [],
+                  [],
+                  [],
+                  nil,
+                  [KeywordParameterNode(365...369)(
+                     (365...367),
+                     IntegerNode(368...369)()
+                   ),
+                   KeywordParameterNode(373...377)(
+                     (373...375),
+                     IntegerNode(376...377)()
+                   )],
+                  nil,
+                  nil
+                ),
+                [],
+                (361...362),
+                (380...381)
+              ),
+              nil,
+              (359...360),
+              (382...383)
+            ),
+            0,
+            "lambda"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(385...402)(
+       nil,
+       nil,
+       (385...388),
+       nil,
+       nil,
+       nil,
+       BlockNode(389...402)(
+         [:bar],
+         BlockParametersNode(392...398)(
+           ParametersNode(393...397)(
+             [RequiredParameterNode(393...396)(:bar)],
+             [],
+             [],
+             RestParameterNode(396...397)((396...397), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (392...393),
+           (397...398)
+         ),
+         nil,
+         (389...391),
+         (399...402)
+       ),
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/boolean_operators.txt b/test/yarp/snapshots/boolean_operators.txt
new file mode 100644
index 0000000000..6c3ef5a4a7
--- /dev/null
+++ b/test/yarp/snapshots/boolean_operators.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...24)(
+  [:a],
+  StatementsNode(0...24)(
+    [LocalVariableOperatorAndWriteNode(0...7)(
+       (0...1),
+       (2...5),
+       CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b"),
+       :a
+     ),
+     LocalVariableOperatorWriteNode(9...15)(
+       (9...10),
+       (11...13),
+       CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "b"),
+       :a,
+       :+
+     ),
+     LocalVariableOperatorOrWriteNode(17...24)(
+       (17...18),
+       (19...22),
+       CallNode(23...24)(nil, nil, (23...24), nil, nil, nil, nil, 0, "b"),
+       :a
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/booleans.txt b/test/yarp/snapshots/booleans.txt
new file mode 100644
index 0000000000..f4e609652c
--- /dev/null
+++ b/test/yarp/snapshots/booleans.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)([FalseNode(0...5)(), TrueNode(7...11)()])
+)
diff --git a/test/yarp/snapshots/break.txt b/test/yarp/snapshots/break.txt
new file mode 100644
index 0000000000..b8ae8ffe81
--- /dev/null
+++ b/test/yarp/snapshots/break.txt
@@ -0,0 +1,158 @@
+ProgramNode(0...168)(
+  [],
+  StatementsNode(0...168)(
+    [BreakNode(0...5)(nil, (0...5)),
+     BreakNode(7...26)(
+       ArgumentsNode(13...26)(
+         [ParenthesesNode(13...16)(
+            StatementsNode(14...15)([IntegerNode(14...15)()]),
+            (13...14),
+            (15...16)
+          ),
+          ParenthesesNode(18...21)(
+            StatementsNode(19...20)([IntegerNode(19...20)()]),
+            (18...19),
+            (20...21)
+          ),
+          ParenthesesNode(23...26)(
+            StatementsNode(24...25)([IntegerNode(24...25)()]),
+            (23...24),
+            (25...26)
+          )]
+       ),
+       (7...12)
+     ),
+     BreakNode(28...35)(
+       ArgumentsNode(34...35)([IntegerNode(34...35)()]),
+       (28...33)
+     ),
+     BreakNode(37...50)(
+       ArgumentsNode(43...50)(
+         [IntegerNode(43...44)(),
+          IntegerNode(46...47)(),
+          IntegerNode(49...50)()]
+       ),
+       (37...42)
+     ),
+     BreakNode(52...65)(
+       ArgumentsNode(58...65)(
+         [IntegerNode(58...59)(),
+          IntegerNode(61...62)(),
+          IntegerNode(64...65)()]
+       ),
+       (52...57)
+     ),
+     BreakNode(67...82)(
+       ArgumentsNode(73...82)(
+         [ArrayNode(73...82)(
+            [IntegerNode(74...75)(),
+             IntegerNode(77...78)(),
+             IntegerNode(80...81)()],
+            (73...74),
+            (81...82)
+          )]
+       ),
+       (67...72)
+     ),
+     BreakNode(84...100)(
+       ArgumentsNode(89...100)(
+         [ParenthesesNode(89...100)(
+            StatementsNode(93...98)(
+              [IntegerNode(93...94)(), IntegerNode(97...98)()]
+            ),
+            (89...90),
+            (99...100)
+          )]
+       ),
+       (84...89)
+     ),
+     BreakNode(102...109)(
+       ArgumentsNode(107...109)(
+         [ParenthesesNode(107...109)(nil, (107...108), (108...109))]
+       ),
+       (102...107)
+     ),
+     BreakNode(111...119)(
+       ArgumentsNode(116...119)(
+         [ParenthesesNode(116...119)(
+            StatementsNode(117...118)([IntegerNode(117...118)()]),
+            (116...117),
+            (118...119)
+          )]
+       ),
+       (111...116)
+     ),
+     CallNode(121...143)(
+       CallNode(121...137)(
+         nil,
+         nil,
+         (121...124),
+         nil,
+         nil,
+         nil,
+         BlockNode(125...137)(
+           [],
+           nil,
+           StatementsNode(127...135)(
+             [BreakNode(127...135)(
+                ArgumentsNode(133...135)([IntegerNode(133...135)()]),
+                (127...132)
+              )]
+           ),
+           (125...126),
+           (136...137)
+         ),
+         0,
+         "foo"
+       ),
+       nil,
+       (138...140),
+       nil,
+       ArgumentsNode(141...143)([IntegerNode(141...143)()]),
+       nil,
+       nil,
+       0,
+       "=="
+     ),
+     CallNode(145...168)(
+       CallNode(145...162)(
+         nil,
+         nil,
+         (145...148),
+         nil,
+         nil,
+         nil,
+         BlockNode(149...162)(
+           [:a],
+           BlockParametersNode(151...154)(
+             ParametersNode(152...153)(
+               [RequiredParameterNode(152...153)(:a)],
+               [],
+               [],
+               nil,
+               [],
+               nil,
+               nil
+             ),
+             [],
+             (151...152),
+             (153...154)
+           ),
+           StatementsNode(155...160)([BreakNode(155...160)(nil, (155...160))]),
+           (149...150),
+           (161...162)
+         ),
+         0,
+         "foo"
+       ),
+       nil,
+       (163...165),
+       nil,
+       ArgumentsNode(166...168)([IntegerNode(166...168)()]),
+       nil,
+       nil,
+       0,
+       "=="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/case.txt b/test/yarp/snapshots/case.txt
new file mode 100644
index 0000000000..f1ee1c9c2d
--- /dev/null
+++ b/test/yarp/snapshots/case.txt
@@ -0,0 +1,207 @@
+ProgramNode(0...272)(
+  [],
+  StatementsNode(0...272)(
+    [CaseNode(0...21)(
+       SymbolNode(5...8)((5...6), (6...8), nil, "hi"),
+       [WhenNode(9...17)(
+          (9...13),
+          [SymbolNode(14...17)((14...15), (15...17), nil, "hi")],
+          nil
+        )],
+       nil,
+       (0...4),
+       (18...21)
+     ),
+     CaseNode(23...81)(
+       TrueNode(28...32)(),
+       [WhenNode(34...53)(
+          (34...38),
+          [TrueNode(39...43)()],
+          StatementsNode(45...53)(
+            [CallNode(45...53)(
+               nil,
+               nil,
+               (45...49),
+               nil,
+               ArgumentsNode(50...53)(
+                 [SymbolNode(50...53)((50...51), (51...53), nil, "hi")]
+               ),
+               nil,
+               nil,
+               0,
+               "puts"
+             )]
+          )
+        ),
+        WhenNode(55...76)(
+          (55...59),
+          [FalseNode(60...65)()],
+          StatementsNode(67...76)(
+            [CallNode(67...76)(
+               nil,
+               nil,
+               (67...71),
+               nil,
+               ArgumentsNode(72...76)(
+                 [SymbolNode(72...76)((72...73), (73...76), nil, "bye")]
+               ),
+               nil,
+               nil,
+               0,
+               "puts"
+             )]
+          )
+        )],
+       nil,
+       (23...27),
+       (78...81)
+     ),
+     CaseNode(83...103)(
+       nil,
+       [WhenNode(89...98)(
+          (89...93),
+          [SplatNode(94...98)(
+             (94...95),
+             CallNode(95...98)(
+               nil,
+               nil,
+               (95...98),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "foo"
+             )
+           )],
+          nil
+        )],
+       nil,
+       (83...87),
+       (100...103)
+     ),
+     CaseNode(105...134)(
+       SymbolNode(110...113)((110...111), (111...113), nil, "hi"),
+       [WhenNode(114...122)(
+          (114...118),
+          [SymbolNode(119...122)((119...120), (120...122), nil, "hi")],
+          nil
+        )],
+       ElseNode(123...134)(
+         (123...127),
+         StatementsNode(128...130)(
+           [SymbolNode(128...130)((128...129), (129...130), nil, "b")]
+         ),
+         (131...134)
+       ),
+       (105...109),
+       (131...134)
+     ),
+     CaseNode(136...172)(
+       CallNode(141...145)(
+         nil,
+         nil,
+         (141...145),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "this"
+       ),
+       [WhenNode(147...167)(
+          (147...151),
+          [ConstantReadNode(152...158)(), ConstantReadNode(160...167)()],
+          nil
+        )],
+       nil,
+       (136...140),
+       (169...172)
+     ),
+     CaseNode(174...198)(
+       nil,
+       [WhenNode(179...194)(
+          (179...183),
+          [CallNode(184...194)(
+             CallNode(184...187)(
+               nil,
+               nil,
+               (184...187),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "foo"
+             ),
+             nil,
+             (188...190),
+             nil,
+             ArgumentsNode(191...194)(
+               [CallNode(191...194)(
+                  nil,
+                  nil,
+                  (191...194),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "bar"
+                )]
+             ),
+             nil,
+             nil,
+             0,
+             "=="
+           )],
+          nil
+        )],
+       nil,
+       (174...178),
+       (195...198)
+     ),
+     CaseNode(200...230)(
+       nil,
+       [WhenNode(205...211)(
+          (205...209),
+          [CallNode(210...211)(
+             nil,
+             nil,
+             (210...211),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "a"
+           )],
+          nil
+        )],
+       ElseNode(212...230)((212...216), nil, (227...230)),
+       (200...204),
+       (227...230)
+     ),
+     CaseNode(232...272)(
+       CallNode(237...241)(
+         nil,
+         nil,
+         (237...241),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "type"
+       ),
+       [WhenNode(246...253)(
+          (246...250),
+          [SymbolNode(251...253)((251...252), (252...253), nil, "b")],
+          nil
+        )],
+       ElseNode(260...272)((260...264), nil, (269...272)),
+       (232...236),
+       (269...272)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/classes.txt b/test/yarp/snapshots/classes.txt
new file mode 100644
index 0000000000..7b65c457ef
--- /dev/null
+++ b/test/yarp/snapshots/classes.txt
@@ -0,0 +1,280 @@
+ProgramNode(0...370)(
+  [],
+  StatementsNode(0...370)(
+    [ClassNode(0...17)(
+       [:a],
+       (0...5),
+       ConstantReadNode(6...7)(),
+       nil,
+       nil,
+       StatementsNode(8...13)(
+         [LocalVariableWriteNode(8...13)(
+            :a,
+            0,
+            IntegerNode(12...13)(),
+            (8...9),
+            (10...11)
+          )]
+       ),
+       (14...17)
+     ),
+     ClassNode(19...39)(
+       [],
+       (19...24),
+       ConstantReadNode(25...26)(),
+       nil,
+       nil,
+       BeginNode(28...39)(
+         nil,
+         nil,
+         nil,
+         nil,
+         EnsureNode(28...39)((28...34), nil, (36...39)),
+         (36...39)
+       ),
+       (36...39)
+     ),
+     ClassNode(41...75)(
+       [],
+       (41...46),
+       ConstantReadNode(47...48)(),
+       nil,
+       nil,
+       BeginNode(50...75)(
+         nil,
+         nil,
+         RescueNode(50...56)((50...56), [], nil, nil, nil, nil),
+         ElseNode(58...70)((58...62), nil, (64...70)),
+         EnsureNode(64...75)((64...70), nil, (72...75)),
+         (72...75)
+       ),
+       (72...75)
+     ),
+     ClassNode(77...98)(
+       [:a],
+       (77...82),
+       ConstantReadNode(83...84)(),
+       (85...86),
+       ConstantReadNode(87...88)(),
+       StatementsNode(89...94)(
+         [LocalVariableWriteNode(89...94)(
+            :a,
+            0,
+            IntegerNode(93...94)(),
+            (89...90),
+            (91...92)
+          )]
+       ),
+       (95...98)
+     ),
+     SingletonClassNode(100...120)(
+       [],
+       (100...105),
+       (106...108),
+       CallNode(109...116)(
+         CallNode(113...116)(
+           nil,
+           nil,
+           (113...116),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         nil,
+         (109...112),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       nil,
+       (117...120)
+     ),
+     ClassNode(122...162)(
+       [],
+       (122...127),
+       ConstantReadNode(128...129)(),
+       nil,
+       nil,
+       StatementsNode(131...157)(
+         [SingletonClassNode(131...157)(
+            [],
+            (131...136),
+            (137...139),
+            SelfNode(140...144)(),
+            BeginNode(146...157)(
+              nil,
+              nil,
+              nil,
+              nil,
+              EnsureNode(146...157)((146...152), nil, (154...157)),
+              (154...157)
+            ),
+            (154...157)
+          )]
+       ),
+       (159...162)
+     ),
+     ClassNode(164...218)(
+       [],
+       (164...169),
+       ConstantReadNode(170...171)(),
+       nil,
+       nil,
+       StatementsNode(173...213)(
+         [SingletonClassNode(173...213)(
+            [],
+            (173...178),
+            (179...181),
+            SelfNode(182...186)(),
+            BeginNode(188...213)(
+              nil,
+              nil,
+              RescueNode(188...194)((188...194), [], nil, nil, nil, nil),
+              ElseNode(196...208)((196...200), nil, (202...208)),
+              EnsureNode(202...213)((202...208), nil, (210...213)),
+              (210...213)
+            ),
+            (210...213)
+          )]
+       ),
+       (215...218)
+     ),
+     SingletonClassNode(220...240)(
+       [],
+       (220...225),
+       (226...228),
+       CallNode(229...236)(
+         CallNode(229...232)(
+           nil,
+           nil,
+           (229...232),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         (232...233),
+         (233...236),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       nil,
+       (237...240)
+     ),
+     SingletonClassNode(242...262)(
+       [],
+       (242...247),
+       (248...250),
+       CallNode(251...258)(
+         CallNode(251...254)(
+           nil,
+           nil,
+           (251...254),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         (254...255),
+         (255...258),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       nil,
+       (259...262)
+     ),
+     SingletonClassNode(264...281)(
+       [],
+       (264...269),
+       (270...272),
+       SelfNode(273...277)(),
+       nil,
+       (278...281)
+     ),
+     SingletonClassNode(283...300)(
+       [],
+       (283...288),
+       (289...291),
+       SelfNode(292...296)(),
+       nil,
+       (297...300)
+     ),
+     SingletonClassNode(302...325)(
+       [],
+       (302...307),
+       (308...310),
+       SelfNode(311...315)(),
+       StatementsNode(316...321)(
+         [CallNode(316...321)(
+            IntegerNode(316...317)(),
+            nil,
+            (318...319),
+            nil,
+            ArgumentsNode(320...321)([IntegerNode(320...321)()]),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       (322...325)
+     ),
+     SingletonClassNode(327...350)(
+       [],
+       (327...332),
+       (333...335),
+       SelfNode(336...340)(),
+       StatementsNode(341...346)(
+         [CallNode(341...346)(
+            IntegerNode(341...342)(),
+            nil,
+            (343...344),
+            nil,
+            ArgumentsNode(345...346)([IntegerNode(345...346)()]),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       (347...350)
+     ),
+     ClassNode(352...370)(
+       [],
+       (352...357),
+       ConstantReadNode(358...359)(),
+       (360...361),
+       CallNode(362...366)(
+         ConstantReadNode(362...363)(),
+         nil,
+         (363...366),
+         (363...364),
+         ArgumentsNode(364...365)([IntegerNode(364...365)()]),
+         (365...366),
+         nil,
+         0,
+         "[]"
+       ),
+       nil,
+       (367...370)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/comments.txt b/test/yarp/snapshots/comments.txt
new file mode 100644
index 0000000000..4b629af138
--- /dev/null
+++ b/test/yarp/snapshots/comments.txt
@@ -0,0 +1,64 @@
+ProgramNode(0...118)(
+  [],
+  StatementsNode(0...118)(
+    [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+     CallNode(13...14)(nil, nil, (13...14), nil, nil, nil, nil, 0, "b"),
+     CallNode(16...17)(nil, nil, (16...17), nil, nil, nil, nil, 0, "c"),
+     CallNode(28...29)(nil, nil, (28...29), nil, nil, nil, nil, 0, "d"),
+     CallNode(31...47)(
+       CallNode(31...32)(nil, nil, (31...32), nil, nil, nil, nil, 0, "e"),
+       (45...46),
+       (46...47),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "f"
+     ),
+     CallNode(49...64)(
+       CallNode(49...50)(nil, nil, (49...50), nil, nil, nil, nil, 0, "g"),
+       (62...63),
+       (63...64),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "h"
+     ),
+     CallNode(66...80)(
+       CallNode(66...67)(nil, nil, (66...67), nil, nil, nil, nil, 0, "i"),
+       (78...79),
+       (79...80),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "j"
+     ),
+     CallNode(82...98)(
+       CallNode(82...83)(nil, nil, (82...83), nil, nil, nil, nil, 0, "k"),
+       (96...97),
+       (97...98),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "l"
+     ),
+     CallNode(100...118)(
+       CallNode(100...101)(nil, nil, (100...101), nil, nil, nil, nil, 0, "m"),
+       (115...117),
+       (117...118),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "n"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/constants.txt b/test/yarp/snapshots/constants.txt
new file mode 100644
index 0000000000..aa97e4ba89
--- /dev/null
+++ b/test/yarp/snapshots/constants.txt
@@ -0,0 +1,916 @@
+ProgramNode(0...709)(
+  [],
+  StatementsNode(0...709)(
+    [ConstantPathNode(0...4)(
+       ConstantReadNode(0...1)(),
+       ConstantReadNode(3...4)(),
+       (1...3)
+     ),
+     ConstantPathNode(6...13)(
+       ConstantPathNode(6...10)(
+         ConstantReadNode(6...7)(),
+         ConstantReadNode(9...10)(),
+         (7...9)
+       ),
+       ConstantReadNode(12...13)(),
+       (10...12)
+     ),
+     ConstantPathNode(15...19)(
+       CallNode(15...16)(nil, nil, (15...16), nil, nil, nil, nil, 0, "a"),
+       ConstantReadNode(18...19)(),
+       (16...18)
+     ),
+     ConstantPathWriteNode(21...29)(
+       ConstantPathNode(21...25)(
+         ConstantReadNode(21...22)(),
+         ConstantReadNode(24...25)(),
+         (22...24)
+       ),
+       (26...27),
+       IntegerNode(28...29)()
+     ),
+     ConstantPathWriteNode(31...36)(
+       ConstantReadNode(31...32)(),
+       (33...34),
+       IntegerNode(35...36)()
+     ),
+     ConstantReadNode(38...41)(),
+     CallNode(43...48)(
+       nil,
+       nil,
+       (43...46),
+       nil,
+       ArgumentsNode(47...48)([IntegerNode(47...48)()]),
+       nil,
+       nil,
+       0,
+       "Foo"
+     ),
+     CallNode(50...58)(
+       ConstantPathNode(50...53)(nil, ConstantReadNode(52...53)(), (50...52)),
+       (53...55),
+       (55...58),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     ConstantPathWriteNode(60...67)(
+       ConstantPathNode(60...63)(nil, ConstantReadNode(62...63)(), (60...62)),
+       (64...65),
+       IntegerNode(66...67)()
+     ),
+     ConstantPathWriteNode(69...79)(
+       ConstantPathNode(69...75)(
+         ConstantPathNode(69...72)(
+           nil,
+           ConstantReadNode(71...72)(),
+           (69...71)
+         ),
+         ConstantReadNode(74...75)(),
+         (72...74)
+       ),
+       (76...77),
+       IntegerNode(78...79)()
+     ),
+     ConstantPathNode(81...87)(
+       ConstantPathNode(81...84)(nil, ConstantReadNode(83...84)(), (81...83)),
+       ConstantReadNode(86...87)(),
+       (84...86)
+     ),
+     ConstantPathNode(89...92)(nil, ConstantReadNode(91...92)(), (89...91)),
+     CallNode(94...102)(
+       ConstantReadNode(94...95)(),
+       (95...97),
+       (97...102),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "false"
+     ),
+     CallNode(104...114)(
+       ConstantPathNode(104...108)(
+         ConstantReadNode(104...105)(),
+         ConstantReadNode(107...108)(),
+         (105...107)
+       ),
+       (108...110),
+       (110...114),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "true"
+     ),
+     CallNode(116...120)(
+       ConstantReadNode(116...117)(),
+       (117...119),
+       (119...120),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "&"
+     ),
+     CallNode(122...126)(
+       ConstantReadNode(122...123)(),
+       (123...125),
+       (125...126),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "`"
+     ),
+     CallNode(128...132)(
+       ConstantReadNode(128...129)(),
+       (129...131),
+       (131...132),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(134...139)(
+       ConstantReadNode(134...135)(),
+       (135...137),
+       (137...139),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!="
+     ),
+     CallNode(141...145)(
+       ConstantReadNode(141...142)(),
+       (142...144),
+       (144...145),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "^"
+     ),
+     CallNode(147...152)(
+       ConstantReadNode(147...148)(),
+       (148...150),
+       (150...152),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "=="
+     ),
+     CallNode(154...160)(
+       ConstantReadNode(154...155)(),
+       (155...157),
+       (157...160),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "==="
+     ),
+     CallNode(162...167)(
+       ConstantReadNode(162...163)(),
+       (163...165),
+       (165...167),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "=~"
+     ),
+     CallNode(169...173)(
+       ConstantReadNode(169...170)(),
+       (170...172),
+       (172...173),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       ">"
+     ),
+     CallNode(175...180)(
+       ConstantReadNode(175...176)(),
+       (176...178),
+       (178...180),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       ">="
+     ),
+     CallNode(182...187)(
+       ConstantReadNode(182...183)(),
+       (183...185),
+       (185...187),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       ">>"
+     ),
+     CallNode(189...194)(
+       ConstantReadNode(189...190)(),
+       (190...192),
+       (192...194),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "<<"
+     ),
+     CallNode(196...210)(
+       ConstantPathNode(196...203)(
+         ConstantReadNode(196...197)(),
+         ConstantReadNode(202...203)(),
+         (197...199)
+       ),
+       (203...205),
+       (205...210),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "alias"
+     ),
+     CallNode(212...218)(
+       ConstantReadNode(212...213)(),
+       (213...215),
+       (215...218),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "and"
+     ),
+     CallNode(220...228)(
+       ConstantReadNode(220...221)(),
+       (221...223),
+       (223...228),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "begin"
+     ),
+     ConstantPathNode(230...238)(
+       ConstantReadNode(230...231)(),
+       ConstantReadNode(233...238)(),
+       (231...233)
+     ),
+     CallNode(240...248)(
+       ConstantReadNode(240...241)(),
+       (241...243),
+       (243...248),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "break"
+     ),
+     CallNode(250...258)(
+       ConstantReadNode(250...251)(),
+       (251...253),
+       (253...258),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "class"
+     ),
+     CallNode(260...266)(
+       ConstantReadNode(260...261)(),
+       (261...263),
+       (263...266),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "def"
+     ),
+     CallNode(268...278)(
+       ConstantReadNode(268...269)(),
+       (269...271),
+       (271...278),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "defined"
+     ),
+     CallNode(280...285)(
+       ConstantReadNode(280...281)(),
+       (281...283),
+       (283...285),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "do"
+     ),
+     CallNode(287...294)(
+       ConstantReadNode(287...288)(),
+       (288...290),
+       (290...294),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "else"
+     ),
+     CallNode(296...304)(
+       ConstantReadNode(296...297)(),
+       (297...299),
+       (299...304),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "elsif"
+     ),
+     CallNode(306...312)(
+       ConstantReadNode(306...307)(),
+       (307...309),
+       (309...312),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "end"
+     ),
+     ConstantPathNode(314...320)(
+       ConstantReadNode(314...315)(),
+       ConstantReadNode(317...320)(),
+       (315...317)
+     ),
+     CallNode(322...331)(
+       ConstantReadNode(322...323)(),
+       (323...325),
+       (325...331),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "ensure"
+     ),
+     CallNode(333...341)(
+       ConstantReadNode(333...334)(),
+       (334...336),
+       (336...341),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "false"
+     ),
+     CallNode(343...349)(
+       ConstantReadNode(343...344)(),
+       (344...346),
+       (346...349),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "for"
+     ),
+     CallNode(351...356)(
+       ConstantReadNode(351...352)(),
+       (352...354),
+       (354...356),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "if"
+     ),
+     CallNode(358...363)(
+       ConstantReadNode(358...359)(),
+       (359...361),
+       (361...363),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "in"
+     ),
+     CallNode(365...372)(
+       ConstantReadNode(365...366)(),
+       (366...368),
+       (368...372),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "next"
+     ),
+     CallNode(374...380)(
+       ConstantReadNode(374...375)(),
+       (375...377),
+       (377...380),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "nil"
+     ),
+     CallNode(382...388)(
+       ConstantReadNode(382...383)(),
+       (383...385),
+       (385...388),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "not"
+     ),
+     CallNode(390...395)(
+       ConstantReadNode(390...391)(),
+       (391...393),
+       (393...395),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "or"
+     ),
+     CallNode(397...404)(
+       ConstantReadNode(397...398)(),
+       (398...400),
+       (400...404),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "redo"
+     ),
+     CallNode(406...415)(
+       ConstantReadNode(406...407)(),
+       (407...409),
+       (409...415),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "rescue"
+     ),
+     CallNode(417...425)(
+       ConstantReadNode(417...418)(),
+       (418...420),
+       (420...425),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "retry"
+     ),
+     CallNode(427...436)(
+       ConstantReadNode(427...428)(),
+       (428...430),
+       (430...436),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "return"
+     ),
+     CallNode(438...445)(
+       ConstantReadNode(438...439)(),
+       (439...441),
+       (441...445),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "self"
+     ),
+     CallNode(447...455)(
+       ConstantReadNode(447...448)(),
+       (448...450),
+       (450...455),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "super"
+     ),
+     CallNode(457...464)(
+       ConstantReadNode(457...458)(),
+       (458...460),
+       (460...464),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "then"
+     ),
+     CallNode(466...473)(
+       ConstantReadNode(466...467)(),
+       (467...469),
+       (469...473),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "true"
+     ),
+     CallNode(475...483)(
+       ConstantReadNode(475...476)(),
+       (476...478),
+       (478...483),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "undef"
+     ),
+     CallNode(485...494)(
+       ConstantReadNode(485...486)(),
+       (486...488),
+       (488...494),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "unless"
+     ),
+     CallNode(496...504)(
+       ConstantReadNode(496...497)(),
+       (497...499),
+       (499...504),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "until"
+     ),
+     CallNode(506...513)(
+       ConstantReadNode(506...507)(),
+       (507...509),
+       (509...513),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "when"
+     ),
+     CallNode(515...523)(
+       ConstantReadNode(515...516)(),
+       (516...518),
+       (518...523),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "while"
+     ),
+     CallNode(525...533)(
+       ConstantReadNode(525...526)(),
+       (526...528),
+       (528...533),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "yield"
+     ),
+     CallNode(535...550)(
+       ConstantReadNode(535...536)(),
+       (536...538),
+       (538...550),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "__ENCODING__"
+     ),
+     CallNode(552...563)(
+       ConstantReadNode(552...553)(),
+       (553...555),
+       (555...563),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "__FILE__"
+     ),
+     CallNode(565...576)(
+       ConstantReadNode(565...566)(),
+       (566...568),
+       (568...576),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "__LINE__"
+     ),
+     CallNode(578...582)(
+       ConstantReadNode(578...579)(),
+       (579...581),
+       (581...582),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "<"
+     ),
+     CallNode(584...590)(
+       ConstantReadNode(584...585)(),
+       (585...587),
+       (587...590),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "<=>"
+     ),
+     CallNode(592...597)(
+       ConstantReadNode(592...593)(),
+       (593...595),
+       (595...597),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "<<"
+     ),
+     CallNode(599...603)(
+       ConstantReadNode(599...600)(),
+       (600...602),
+       (602...603),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-"
+     ),
+     CallNode(605...609)(
+       ConstantReadNode(605...606)(),
+       (606...608),
+       (608...609),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "%"
+     ),
+     CallNode(611...616)(
+       ConstantReadNode(611...612)(),
+       (612...614),
+       (615...616),
+       nil,
+       ArgumentsNode(615...616)(
+         [CallNode(615...616)(
+            nil,
+            nil,
+            (615...616),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "i"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "i"
+     ),
+     CallNode(618...623)(
+       ConstantReadNode(618...619)(),
+       (619...621),
+       (622...623),
+       nil,
+       ArgumentsNode(622...623)(
+         [CallNode(622...623)(
+            nil,
+            nil,
+            (622...623),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "w"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "w"
+     ),
+     CallNode(625...630)(
+       ConstantReadNode(625...626)(),
+       (626...628),
+       (629...630),
+       nil,
+       ArgumentsNode(629...630)(
+         [CallNode(629...630)(
+            nil,
+            nil,
+            (629...630),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "x"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     ),
+     CallNode(632...637)(
+       ConstantReadNode(632...633)(),
+       (633...635),
+       (636...637),
+       nil,
+       ArgumentsNode(636...637)([ConstantReadNode(636...637)()]),
+       nil,
+       nil,
+       0,
+       "I"
+     ),
+     CallNode(639...644)(
+       ConstantReadNode(639...640)(),
+       (640...642),
+       (643...644),
+       nil,
+       ArgumentsNode(643...644)([ConstantReadNode(643...644)()]),
+       nil,
+       nil,
+       0,
+       "W"
+     ),
+     CallNode(646...650)(
+       ConstantReadNode(646...647)(),
+       (647...649),
+       (649...650),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "|"
+     ),
+     CallNode(652...656)(
+       ConstantReadNode(652...653)(),
+       (653...655),
+       (655...656),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     CallNode(658...662)(
+       ConstantReadNode(658...659)(),
+       (659...661),
+       (661...662),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(664...668)(
+       ConstantReadNode(664...665)(),
+       (665...667),
+       (667...668),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "*"
+     ),
+     CallNode(670...675)(
+       ConstantReadNode(670...671)(),
+       (671...673),
+       (673...675),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "**"
+     ),
+     CallNode(677...681)(
+       ConstantReadNode(677...678)(),
+       (678...680),
+       (680...681),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "~"
+     ),
+     RangeNode(683...709)(
+       CallNode(683...695)(
+         ConstantPathNode(683...692)(
+           CallNode(683...687)(
+             ConstantReadNode(683...684)(),
+             (684...686),
+             (686...687),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "_"
+           ),
+           ConstantReadNode(691...692)(),
+           (687...689)
+         ),
+         (692...694),
+         (694...695),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "_"
+       ),
+       CallNode(699...709)(
+         ConstantReadNode(699...700)(),
+         (700...702),
+         (702...709),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "__END__"
+       ),
+       (695...697),
+       0
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/dash_heredocs.txt b/test/yarp/snapshots/dash_heredocs.txt
new file mode 100644
index 0000000000..bc4c90a76f
--- /dev/null
+++ b/test/yarp/snapshots/dash_heredocs.txt
@@ -0,0 +1,121 @@
+ProgramNode(0...223)(
+  [],
+  StatementsNode(0...223)(
+    [InterpolatedStringNode(0...15)(
+       (0...6),
+       [StringNode(7...11)(nil, (7...11), nil, "  a\n")],
+       (11...15)
+     ),
+     CallNode(16...58)(
+       InterpolatedStringNode(16...47)(
+         (16...24),
+         [StringNode(37...41)(nil, (37...41), nil, "  a\n")],
+         (41...47)
+       ),
+       nil,
+       (25...26),
+       nil,
+       ArgumentsNode(27...58)(
+         [InterpolatedStringNode(27...58)(
+            (27...36),
+            [StringNode(47...51)(nil, (47...51), nil, "  b\n")],
+            (51...58)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     InterpolatedXStringNode(59...81)(
+       (59...67),
+       [StringNode(68...72)(nil, (68...72), nil, "  a\n"),
+        EmbeddedStatementsNode(72...76)(
+          (72...74),
+          StatementsNode(74...75)(
+            [CallNode(74...75)(
+               nil,
+               nil,
+               (74...75),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "b"
+             )]
+          ),
+          (75...76)
+        ),
+        StringNode(76...77)(nil, (76...77), nil, "\n")],
+       (77...81)
+     ),
+     InterpolatedStringNode(82...106)(
+       (82...88),
+       [StringNode(98...102)(nil, (98...102), nil, "  a\n")],
+       (102...106)
+     ),
+     InterpolatedStringNode(107...128)(
+       (107...113),
+       [StringNode(114...122)(nil, (114...122), nil, "  a\n" + "  b\n")],
+       (122...128)
+     ),
+     InterpolatedStringNode(129...151)(
+       (129...137),
+       [StringNode(138...142)(nil, (138...142), nil, "  a\n"),
+        EmbeddedStatementsNode(142...146)(
+          (142...144),
+          StatementsNode(144...145)(
+            [CallNode(144...145)(
+               nil,
+               nil,
+               (144...145),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "b"
+             )]
+          ),
+          (145...146)
+        ),
+        StringNode(146...147)(nil, (146...147), nil, "\n")],
+       (147...151)
+     ),
+     InterpolatedStringNode(152...172)(
+       (152...158),
+       [StringNode(159...163)(nil, (159...163), nil, "  a\n"),
+        EmbeddedStatementsNode(163...167)(
+          (163...165),
+          StatementsNode(165...166)(
+            [CallNode(165...166)(
+               nil,
+               nil,
+               (165...166),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "b"
+             )]
+          ),
+          (166...167)
+        ),
+        StringNode(167...168)(nil, (167...168), nil, "\n")],
+       (168...172)
+     ),
+     StringNode(173...179)((173...175), (175...178), (178...179), "abc"),
+     InterpolatedStringNode(181...200)(
+       (181...187),
+       [StringNode(188...196)(nil, (188...196), nil, "  a\n" + "  b\n")],
+       (196...200)
+     ),
+     InterpolatedStringNode(201...223)(
+       (201...209),
+       [StringNode(210...219)(nil, (210...219), nil, "  a \#{1}\n")],
+       (219...223)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/defined.txt b/test/yarp/snapshots/defined.txt
new file mode 100644
index 0000000000..df02a1d10d
--- /dev/null
+++ b/test/yarp/snapshots/defined.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...78)(
+  [:x],
+  StatementsNode(0...78)(
+    [AndNode(0...25)(
+       DefinedNode(0...10)(nil, IntegerNode(9...10)(), nil, (0...8)),
+       DefinedNode(15...25)(nil, IntegerNode(24...25)(), nil, (15...23)),
+       (11...14)
+     ),
+     DefinedNode(27...43)(
+       (35...36),
+       LocalVariableOperatorWriteNode(36...42)(
+         (36...37),
+         (38...40),
+         IntegerNode(41...42)(),
+         :x,
+         :%
+       ),
+       (42...43),
+       (27...35)
+     ),
+     DefinedNode(45...66)(
+       (53...54),
+       AndNode(54...65)(
+         CallNode(54...57)(nil, nil, (54...57), nil, nil, nil, nil, 0, "foo"),
+         CallNode(62...65)(nil, nil, (62...65), nil, nil, nil, nil, 0, "bar"),
+         (58...61)
+       ),
+       (65...66),
+       (45...53)
+     ),
+     DefinedNode(68...78)(nil, IntegerNode(77...78)(), nil, (68...76))]
+  )
+)
diff --git a/test/yarp/snapshots/dos_endings.txt b/test/yarp/snapshots/dos_endings.txt
new file mode 100644
index 0000000000..e1c6c9fec1
--- /dev/null
+++ b/test/yarp/snapshots/dos_endings.txt
@@ -0,0 +1,81 @@
+ProgramNode(0...108)(
+  [:x, :a],
+  StatementsNode(0...108)(
+    [CallNode(0...24)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       ArgumentsNode(5...24)(
+         [StringConcatNode(5...24)(
+            StringNode(5...9)((5...6), (6...8), (8...9), "hi"),
+            StringNode(17...24)((17...18), (18...23), (23...24), "there")
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "puts"
+     ),
+     ArrayNode(28...37)(
+       [SymbolNode(31...36)(nil, (31...36), nil, "a\u0000\u0000b")],
+       (28...31),
+       (36...37)
+     ),
+     InterpolatedStringNode(41...73)(
+       (41...45),
+       [StringNode(47...70)(
+          nil,
+          (47...70),
+          nil,
+          "    1 \u0000\u0000    2\r\n" + "    3\r\n"
+        )],
+       (70...73)
+     ),
+     LocalVariableWriteNode(75...84)(
+       :x,
+       0,
+       StringNode(79...84)((79...82), (82...82), (82...84), ""),
+       (75...76),
+       (77...78)
+     ),
+     LocalVariableWriteNode(88...108)(
+       :a,
+       0,
+       CallNode(92...108)(
+         nil,
+         nil,
+         (92...95),
+         (95...96),
+         ArgumentsNode(96...107)(
+           [CallNode(96...107)(
+              InterpolatedStringNode(96...128)(
+                (96...102),
+                [StringNode(110...121)(
+                   nil,
+                   (110...121),
+                   nil,
+                   "\n" + "baz\r\n"
+                 )],
+                (121...128)
+              ),
+              (102...103),
+              (103...107),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "chop"
+            )]
+         ),
+         (107...108),
+         nil,
+         0,
+         "foo"
+       ),
+       (88...89),
+       (90...91)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/embdoc_no_newline_at_end.txt b/test/yarp/snapshots/embdoc_no_newline_at_end.txt
new file mode 100644
index 0000000000..bd3eaf5ff4
--- /dev/null
+++ b/test/yarp/snapshots/embdoc_no_newline_at_end.txt
@@ -0,0 +1 @@
+ProgramNode(0...0)([], StatementsNode(0...0)([]))
diff --git a/test/yarp/snapshots/for.txt b/test/yarp/snapshots/for.txt
new file mode 100644
index 0000000000..0bd8319aa1
--- /dev/null
+++ b/test/yarp/snapshots/for.txt
@@ -0,0 +1,128 @@
+ProgramNode(0...143)(
+  [:i, :j, :k],
+  StatementsNode(0...143)(
+    [ForNode(0...20)(
+       MultiWriteNode(4...5)(
+         [LocalVariableWriteNode(4...5)(:i, 0, nil, (4...5), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       RangeNode(9...14)(
+         IntegerNode(9...10)(),
+         IntegerNode(12...14)(),
+         (10...12),
+         0
+       ),
+       StatementsNode(15...16)([LocalVariableReadNode(15...16)(:i, 0)]),
+       (0...3),
+       (6...8),
+       nil,
+       (17...20)
+     ),
+     ForNode(22...44)(
+       MultiWriteNode(26...27)(
+         [LocalVariableWriteNode(26...27)(:i, 0, nil, (26...27), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       RangeNode(31...36)(
+         IntegerNode(31...32)(),
+         IntegerNode(34...36)(),
+         (32...34),
+         0
+       ),
+       StatementsNode(38...39)([LocalVariableReadNode(38...39)(:i, 0)]),
+       (22...25),
+       (28...30),
+       nil,
+       (41...44)
+     ),
+     ForNode(46...68)(
+       MultiWriteNode(50...53)(
+         [LocalVariableWriteNode(50...51)(:i, 0, nil, (50...51), nil),
+          LocalVariableWriteNode(52...53)(:j, 0, nil, (52...53), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       RangeNode(57...62)(
+         IntegerNode(57...58)(),
+         IntegerNode(60...62)(),
+         (58...60),
+         0
+       ),
+       StatementsNode(63...64)([LocalVariableReadNode(63...64)(:i, 0)]),
+       (46...49),
+       (54...56),
+       nil,
+       (65...68)
+     ),
+     ForNode(70...94)(
+       MultiWriteNode(74...79)(
+         [LocalVariableWriteNode(74...75)(:i, 0, nil, (74...75), nil),
+          LocalVariableWriteNode(76...77)(:j, 0, nil, (76...77), nil),
+          LocalVariableWriteNode(78...79)(:k, 0, nil, (78...79), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       RangeNode(83...88)(
+         IntegerNode(83...84)(),
+         IntegerNode(86...88)(),
+         (84...86),
+         0
+       ),
+       StatementsNode(89...90)([LocalVariableReadNode(89...90)(:i, 0)]),
+       (70...73),
+       (80...82),
+       nil,
+       (91...94)
+     ),
+     ForNode(96...119)(
+       MultiWriteNode(100...101)(
+         [LocalVariableWriteNode(100...101)(:i, 0, nil, (100...101), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       RangeNode(105...110)(
+         IntegerNode(105...106)(),
+         IntegerNode(108...110)(),
+         (106...108),
+         0
+       ),
+       StatementsNode(114...115)([LocalVariableReadNode(114...115)(:i, 0)]),
+       (96...99),
+       (102...104),
+       (111...113),
+       (116...119)
+     ),
+     ForNode(121...143)(
+       MultiWriteNode(125...126)(
+         [LocalVariableWriteNode(125...126)(:i, 0, nil, (125...126), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       RangeNode(130...135)(
+         IntegerNode(130...131)(),
+         IntegerNode(133...135)(),
+         (131...133),
+         0
+       ),
+       StatementsNode(137...138)([LocalVariableReadNode(137...138)(:i, 0)]),
+       (121...124),
+       (127...129),
+       nil,
+       (140...143)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/global_variables.txt b/test/yarp/snapshots/global_variables.txt
new file mode 100644
index 0000000000..2b3e1447fd
--- /dev/null
+++ b/test/yarp/snapshots/global_variables.txt
@@ -0,0 +1,50 @@
+ProgramNode(0...340)(
+  [],
+  StatementsNode(0...340)(
+    [GlobalVariableReadNode(0...16)(),
+     GlobalVariableReadNode(18...20)(),
+     GlobalVariableReadNode(22...25)(),
+     GlobalVariableReadNode(27...37)(),
+     GlobalVariableReadNode(39...45)(),
+     GlobalVariableReadNode(47...54)(),
+     GlobalVariableReadNode(56...63)(),
+     GlobalVariableReadNode(65...67)(),
+     GlobalVariableReadNode(69...71)(),
+     GlobalVariableReadNode(73...75)(),
+     BackReferenceReadNode(77...79)(),
+     BackReferenceReadNode(81...83)(),
+     BackReferenceReadNode(85...87)(),
+     BackReferenceReadNode(89...91)(),
+     GlobalVariableReadNode(93...95)(),
+     GlobalVariableReadNode(97...99)(),
+     GlobalVariableReadNode(101...103)(),
+     GlobalVariableReadNode(105...111)(),
+     GlobalVariableReadNode(113...122)(),
+     GlobalVariableReadNode(124...127)(),
+     GlobalVariableReadNode(129...145)(),
+     GlobalVariableReadNode(147...155)(),
+     GlobalVariableReadNode(157...160)(),
+     SymbolNode(162...179)((162...163), (163...179), nil, "$global_variable"),
+     SymbolNode(181...184)((181...182), (182...184), nil, "$_"),
+     SymbolNode(186...190)((186...187), (187...190), nil, "$-w"),
+     SymbolNode(192...203)((192...193), (193...203), nil, "$LOAD_PATH"),
+     SymbolNode(205...212)((205...206), (206...212), nil, "$stdin"),
+     SymbolNode(214...222)((214...215), (215...222), nil, "$stdout"),
+     SymbolNode(224...232)((224...225), (225...232), nil, "$stderr"),
+     SymbolNode(234...237)((234...235), (235...237), nil, "$!"),
+     SymbolNode(239...242)((239...240), (240...242), nil, "$?"),
+     SymbolNode(244...247)((244...245), (245...247), nil, "$~"),
+     SymbolNode(249...252)((249...250), (250...252), nil, "$&"),
+     SymbolNode(254...257)((254...255), (255...257), nil, "$`"),
+     SymbolNode(259...262)((259...260), (260...262), nil, "$'"),
+     SymbolNode(264...267)((264...265), (265...267), nil, "$+"),
+     SymbolNode(269...272)((269...270), (270...272), nil, "$:"),
+     SymbolNode(274...277)((274...275), (275...277), nil, "$;"),
+     SymbolNode(279...286)((279...280), (280...286), nil, "$DEBUG"),
+     SymbolNode(288...298)((288...289), (289...298), nil, "$FILENAME"),
+     SymbolNode(300...304)((300...301), (301...304), nil, "$-0"),
+     SymbolNode(306...323)((306...307), (307...323), nil, "$LOADED_FEATURES"),
+     SymbolNode(325...334)((325...326), (326...334), nil, "$VERBOSE"),
+     SymbolNode(336...340)((336...337), (337...340), nil, "$-K")]
+  )
+)
diff --git a/test/yarp/snapshots/hashes.txt b/test/yarp/snapshots/hashes.txt
new file mode 100644
index 0000000000..41c166bb27
--- /dev/null
+++ b/test/yarp/snapshots/hashes.txt
@@ -0,0 +1,110 @@
+ProgramNode(0...120)(
+  [],
+  StatementsNode(0...120)(
+    [HashNode(0...2)((0...1), [], (1...2)),
+     HashNode(4...7)((4...5), [], (6...7)),
+     HashNode(9...27)(
+       (9...10),
+       [AssocNode(11...17)(
+          CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "a"),
+          CallNode(16...17)(nil, nil, (16...17), nil, nil, nil, nil, 0, "b"),
+          (13...15)
+        ),
+        AssocNode(19...25)(
+          CallNode(19...20)(nil, nil, (19...20), nil, nil, nil, nil, 0, "c"),
+          CallNode(24...25)(nil, nil, (24...25), nil, nil, nil, nil, 0, "d"),
+          (21...23)
+        )],
+       (26...27)
+     ),
+     HashNode(29...44)(
+       (29...30),
+       [AssocNode(31...37)(
+          CallNode(31...32)(nil, nil, (31...32), nil, nil, nil, nil, 0, "a"),
+          CallNode(36...37)(nil, nil, (36...37), nil, nil, nil, nil, 0, "b"),
+          (33...35)
+        ),
+        AssocSplatNode(39...42)(
+          CallNode(41...42)(nil, nil, (41...42), nil, nil, nil, nil, 0, "c"),
+          (39...41)
+        )],
+       (43...44)
+     ),
+     HashNode(46...79)(
+       (46...47),
+       [AssocNode(54...58)(
+          SymbolNode(54...56)(nil, (54...55), (55...56), "a"),
+          CallNode(57...58)(nil, nil, (57...58), nil, nil, nil, nil, 0, "b"),
+          nil
+        ),
+        AssocNode(66...70)(
+          SymbolNode(66...68)(nil, (66...67), (67...68), "c"),
+          CallNode(69...70)(nil, nil, (69...70), nil, nil, nil, nil, 0, "d"),
+          nil
+        )],
+       (78...79)
+     ),
+     HashNode(81...106)(
+       (81...82),
+       [AssocNode(83...87)(
+          SymbolNode(83...85)(nil, (83...84), (84...85), "a"),
+          CallNode(86...87)(nil, nil, (86...87), nil, nil, nil, nil, 0, "b"),
+          nil
+        ),
+        AssocNode(89...93)(
+          SymbolNode(89...91)(nil, (89...90), (90...91), "c"),
+          CallNode(92...93)(nil, nil, (92...93), nil, nil, nil, nil, 0, "d"),
+          nil
+        ),
+        AssocSplatNode(95...98)(
+          CallNode(97...98)(nil, nil, (97...98), nil, nil, nil, nil, 0, "e"),
+          (95...97)
+        ),
+        AssocNode(100...104)(
+          SymbolNode(100...102)(nil, (100...101), (101...102), "f"),
+          CallNode(103...104)(
+            nil,
+            nil,
+            (103...104),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "g"
+          ),
+          nil
+        )],
+       (105...106)
+     ),
+     HashNode(108...120)(
+       (108...109),
+       [AssocNode(110...118)(
+          SymbolNode(110...114)((110...111), (111...112), (112...114), "a"),
+          CallNode(115...118)(
+            CallNode(116...118)(
+              nil,
+              nil,
+              (116...118),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b?"
+            ),
+            nil,
+            (115...116),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "!"
+          ),
+          nil
+        )],
+       (119...120)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/heredoc_with_trailing_newline.txt b/test/yarp/snapshots/heredoc_with_trailing_newline.txt
new file mode 100644
index 0000000000..d69085b36a
--- /dev/null
+++ b/test/yarp/snapshots/heredoc_with_trailing_newline.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [InterpolatedStringNode(0...10)((0...6), [], (7...10))]
+  )
+)
diff --git a/test/yarp/snapshots/heredocs_nested.txt b/test/yarp/snapshots/heredocs_nested.txt
new file mode 100644
index 0000000000..ff25d3daa2
--- /dev/null
+++ b/test/yarp/snapshots/heredocs_nested.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...47)(
+  [],
+  StatementsNode(0...47)(
+    [InterpolatedStringNode(0...47)(
+       (0...7),
+       [StringNode(8...12)(nil, (8...12), nil, "pre\n"),
+        EmbeddedStatementsNode(12...36)(
+          (12...14),
+          StatementsNode(15...35)(
+            [InterpolatedStringNode(15...35)(
+               (15...21),
+               [StringNode(22...30)(nil, (22...30), nil, "  hello\n")],
+               (30...35)
+             )]
+          ),
+          (35...36)
+        ),
+        StringNode(36...42)(nil, (36...42), nil, "\n" + "post\n")],
+       (42...47)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/heredocs_with_ignored_newlines.txt b/test/yarp/snapshots/heredocs_with_ignored_newlines.txt
new file mode 100644
index 0000000000..2c0638c0ba
--- /dev/null
+++ b/test/yarp/snapshots/heredocs_with_ignored_newlines.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...106)(
+  [],
+  StatementsNode(0...106)(
+    [InterpolatedStringNode(0...14)((0...7), [], (9...14)),
+     InterpolatedStringNode(15...106)(
+       (15...23),
+       [StringNode(25...100)(
+          nil,
+          (25...100),
+          nil,
+          "way over\n" +
+          "<<HERE\n" +
+          "  not here\n" +
+          "HERE\n" +
+          "\n" +
+          "<<~BUT\n" +
+          "  but\n" +
+          "BUT\n" +
+          "  there\n"
+        )],
+       (100...106)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/heredocs_with_ignored_newlines_and_non_empty.txt b/test/yarp/snapshots/heredocs_with_ignored_newlines_and_non_empty.txt
new file mode 100644
index 0000000000..a002f24451
--- /dev/null
+++ b/test/yarp/snapshots/heredocs_with_ignored_newlines_and_non_empty.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [InterpolatedStringNode(0...26)(
+       (0...6),
+       [StringNode(7...23)(nil, (7...23), nil, " some\n" + " heredocs\n")],
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/if.txt b/test/yarp/snapshots/if.txt
new file mode 100644
index 0000000000..f8a697c746
--- /dev/null
+++ b/test/yarp/snapshots/if.txt
@@ -0,0 +1,230 @@
+ProgramNode(0...293)(
+  [],
+  StatementsNode(0...293)(
+    [IfNode(0...15)(
+       (0...2),
+       TrueNode(3...7)(),
+       StatementsNode(9...10)([IntegerNode(9...10)()]),
+       nil,
+       (12...15)
+     ),
+     IfNode(17...37)(
+       (17...19),
+       TrueNode(20...24)(),
+       StatementsNode(25...26)([IntegerNode(25...26)()]),
+       ElseNode(27...37)(
+         (27...31),
+         StatementsNode(32...33)([IntegerNode(32...33)()]),
+         (34...37)
+       ),
+       (34...37)
+     ),
+     IfNode(39...112)(
+       (39...41),
+       TrueNode(42...46)(),
+       StatementsNode(52...56)([TrueNode(52...56)()]),
+       IfNode(57...112)(
+         (57...62),
+         FalseNode(63...68)(),
+         StatementsNode(74...79)([FalseNode(74...79)()]),
+         IfNode(80...112)(
+           (80...85),
+           NilNode(86...89)(),
+           StatementsNode(95...98)([NilNode(95...98)()]),
+           ElseNode(99...112)(
+             (99...103),
+             StatementsNode(104...108)([SelfNode(104...108)()]),
+             (109...112)
+           ),
+           (109...112)
+         ),
+         (109...112)
+       ),
+       (109...112)
+     ),
+     IfNode(114...123)(
+       (116...118),
+       TrueNode(119...123)(),
+       StatementsNode(114...115)([IntegerNode(114...115)()]),
+       nil,
+       nil
+     ),
+     IfNode(125...138)(
+       (131...133),
+       TrueNode(134...138)(),
+       StatementsNode(125...130)([BreakNode(125...130)(nil, (125...130))]),
+       nil,
+       nil
+     ),
+     IfNode(140...152)(
+       (145...147),
+       TrueNode(148...152)(),
+       StatementsNode(140...144)([NextNode(140...144)(nil, (140...144))]),
+       nil,
+       nil
+     ),
+     IfNode(154...168)(
+       (161...163),
+       TrueNode(164...168)(),
+       StatementsNode(154...160)([ReturnNode(154...160)((154...160), nil)]),
+       nil,
+       nil
+     ),
+     IfNode(170...200)(
+       (170...172),
+       CallNode(173...182)(
+         nil,
+         nil,
+         (173...182),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "exit_loop"
+       ),
+       StatementsNode(188...196)(
+         [BreakNode(188...196)(
+            ArgumentsNode(194...196)([IntegerNode(194...196)()]),
+            (188...193)
+          )]
+       ),
+       nil,
+       (197...200)
+     ),
+     IfNode(202...221)(
+       (202...204),
+       CallNode(205...208)(
+         nil,
+         nil,
+         (205...208),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StatementsNode(214...217)(
+         [CallNode(214...217)(
+            nil,
+            nil,
+            (214...217),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       nil,
+       (218...221)
+     ),
+     IfNode(223...234)(
+       (230...232),
+       CallNode(233...234)(nil, nil, (233...234), nil, nil, nil, nil, 0, "c"),
+       StatementsNode(223...229)(
+         [IfNode(223...229)(
+            (225...227),
+            CallNode(228...229)(
+              nil,
+              nil,
+              (228...229),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            ),
+            StatementsNode(223...224)(
+              [CallNode(223...224)(
+                 nil,
+                 nil,
+                 (223...224),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "a"
+               )]
+            ),
+            nil,
+            nil
+          )]
+       ),
+       nil,
+       nil
+     ),
+     IfNode(236...259)(
+       (236...238),
+       TrueNode(239...243)(),
+       StatementsNode(246...250)(
+         [CallNode(246...250)(
+            nil,
+            nil,
+            (246...247),
+            nil,
+            ArgumentsNode(248...250)(
+              [KeywordHashNode(248...250)(
+                 [AssocNode(248...250)(
+                    SymbolNode(248...250)(nil, (248...249), (249...250), "b"),
+                    nil,
+                    nil
+                  )]
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       ElseNode(251...259)((251...255), nil, (256...259)),
+       (256...259)
+     ),
+     IfNode(261...293)(
+       (261...263),
+       MatchPredicateNode(264...273)(
+         CallNode(264...268)(
+           nil,
+           nil,
+           (264...268),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "type"
+         ),
+         IntegerNode(272...273)(),
+         (269...271)
+       ),
+       nil,
+       IfNode(274...289)(
+         (274...279),
+         MatchPredicateNode(280...289)(
+           CallNode(280...284)(
+             nil,
+             nil,
+             (280...284),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "type"
+           ),
+           ConstantReadNode(288...289)(),
+           (285...287)
+         ),
+         nil,
+         nil,
+         nil
+       ),
+       (290...293)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/integer_operations.txt b/test/yarp/snapshots/integer_operations.txt
new file mode 100644
index 0000000000..5cade8a7d5
--- /dev/null
+++ b/test/yarp/snapshots/integer_operations.txt
@@ -0,0 +1,383 @@
+ProgramNode(0...247)(
+  [],
+  StatementsNode(0...247)(
+    [CallNode(0...2)(
+       IntegerNode(1...2)(),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(4...6)(
+       IntegerNode(5...6)(),
+       nil,
+       (4...5),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "~"
+     ),
+     CallNode(8...14)(
+       IntegerNode(8...9)(),
+       nil,
+       (10...12),
+       nil,
+       ArgumentsNode(13...14)([IntegerNode(13...14)()]),
+       nil,
+       nil,
+       0,
+       "!="
+     ),
+     CallNode(16...22)(
+       IntegerNode(16...17)(),
+       nil,
+       (18...20),
+       nil,
+       ArgumentsNode(21...22)([IntegerNode(21...22)()]),
+       nil,
+       nil,
+       0,
+       "!~"
+     ),
+     CallNode(24...29)(
+       IntegerNode(24...25)(),
+       nil,
+       (26...27),
+       nil,
+       ArgumentsNode(28...29)([IntegerNode(28...29)()]),
+       nil,
+       nil,
+       0,
+       "%"
+     ),
+     CallNode(31...36)(
+       IntegerNode(31...32)(),
+       nil,
+       (33...34),
+       nil,
+       ArgumentsNode(35...36)([IntegerNode(35...36)()]),
+       nil,
+       nil,
+       0,
+       "&"
+     ),
+     CallNode(38...43)(
+       IntegerNode(38...39)(),
+       nil,
+       (40...41),
+       nil,
+       ArgumentsNode(42...43)([IntegerNode(42...43)()]),
+       nil,
+       nil,
+       0,
+       "*"
+     ),
+     CallNode(45...49)(
+       IntegerNode(45...46)(),
+       nil,
+       (46...48),
+       nil,
+       ArgumentsNode(48...49)([IntegerNode(48...49)()]),
+       nil,
+       nil,
+       0,
+       "**"
+     ),
+     CallNode(51...56)(
+       IntegerNode(51...52)(),
+       nil,
+       (53...54),
+       nil,
+       ArgumentsNode(55...56)([IntegerNode(55...56)()]),
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     CallNode(58...63)(
+       IntegerNode(58...59)(),
+       nil,
+       (60...61),
+       nil,
+       ArgumentsNode(62...63)([IntegerNode(62...63)()]),
+       nil,
+       nil,
+       0,
+       "-"
+     ),
+     CallNode(65...70)(
+       IntegerNode(65...66)(),
+       nil,
+       (67...68),
+       nil,
+       ArgumentsNode(69...70)([IntegerNode(69...70)()]),
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(72...77)(
+       CallNode(72...75)(
+         IntegerNode(72...73)(),
+         nil,
+         (73...74),
+         nil,
+         ArgumentsNode(74...75)([IntegerNode(74...75)()]),
+         nil,
+         nil,
+         0,
+         "/"
+       ),
+       nil,
+       (75...76),
+       nil,
+       ArgumentsNode(76...77)([IntegerNode(76...77)()]),
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(79...84)(
+       IntegerNode(79...80)(),
+       nil,
+       (81...82),
+       nil,
+       ArgumentsNode(83...84)([IntegerNode(83...84)()]),
+       nil,
+       nil,
+       0,
+       "<"
+     ),
+     CallNode(86...92)(
+       IntegerNode(86...87)(),
+       nil,
+       (88...90),
+       nil,
+       ArgumentsNode(91...92)([IntegerNode(91...92)()]),
+       nil,
+       nil,
+       0,
+       "<<"
+     ),
+     CallNode(94...100)(
+       IntegerNode(94...95)(),
+       nil,
+       (96...98),
+       nil,
+       ArgumentsNode(99...100)([IntegerNode(99...100)()]),
+       nil,
+       nil,
+       0,
+       "<="
+     ),
+     CallNode(102...109)(
+       IntegerNode(102...103)(),
+       nil,
+       (104...107),
+       nil,
+       ArgumentsNode(108...109)([IntegerNode(108...109)()]),
+       nil,
+       nil,
+       0,
+       "<=>"
+     ),
+     CallNode(111...117)(
+       IntegerNode(111...112)(),
+       nil,
+       (113...115),
+       nil,
+       ArgumentsNode(116...117)([IntegerNode(116...117)()]),
+       nil,
+       nil,
+       0,
+       "=="
+     ),
+     CallNode(119...126)(
+       IntegerNode(119...120)(),
+       nil,
+       (121...124),
+       nil,
+       ArgumentsNode(125...126)([IntegerNode(125...126)()]),
+       nil,
+       nil,
+       0,
+       "==="
+     ),
+     CallNode(128...134)(
+       IntegerNode(128...129)(),
+       nil,
+       (130...132),
+       nil,
+       ArgumentsNode(133...134)([IntegerNode(133...134)()]),
+       nil,
+       nil,
+       0,
+       "=~"
+     ),
+     CallNode(136...141)(
+       IntegerNode(136...137)(),
+       nil,
+       (138...139),
+       nil,
+       ArgumentsNode(140...141)([IntegerNode(140...141)()]),
+       nil,
+       nil,
+       0,
+       ">"
+     ),
+     CallNode(143...149)(
+       IntegerNode(143...144)(),
+       nil,
+       (145...147),
+       nil,
+       ArgumentsNode(148...149)([IntegerNode(148...149)()]),
+       nil,
+       nil,
+       0,
+       ">="
+     ),
+     CallNode(151...157)(
+       IntegerNode(151...152)(),
+       nil,
+       (153...155),
+       nil,
+       ArgumentsNode(156...157)([IntegerNode(156...157)()]),
+       nil,
+       nil,
+       0,
+       ">>"
+     ),
+     CallNode(159...164)(
+       IntegerNode(159...160)(),
+       nil,
+       (161...162),
+       nil,
+       ArgumentsNode(163...164)([IntegerNode(163...164)()]),
+       nil,
+       nil,
+       0,
+       "^"
+     ),
+     CallNode(166...171)(
+       IntegerNode(166...167)(),
+       nil,
+       (168...169),
+       nil,
+       ArgumentsNode(170...171)([IntegerNode(170...171)()]),
+       nil,
+       nil,
+       0,
+       "|"
+     ),
+     AndNode(173...179)(
+       IntegerNode(173...174)(),
+       IntegerNode(178...179)(),
+       (175...177)
+     ),
+     AndNode(181...188)(
+       IntegerNode(181...182)(),
+       IntegerNode(187...188)(),
+       (183...186)
+     ),
+     CallNode(190...200)(
+       IntegerNode(190...191)(),
+       nil,
+       (192...193),
+       nil,
+       ArgumentsNode(194...200)(
+         [CallNode(194...200)(
+            IntegerNode(194...195)(),
+            nil,
+            (196...198),
+            nil,
+            ArgumentsNode(199...200)([IntegerNode(199...200)()]),
+            nil,
+            nil,
+            0,
+            "**"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "*"
+     ),
+     CallNode(202...211)(
+       CallNode(202...207)(
+         IntegerNode(202...203)(),
+         nil,
+         (204...205),
+         nil,
+         ArgumentsNode(206...207)([IntegerNode(206...207)()]),
+         nil,
+         nil,
+         0,
+         "*"
+       ),
+       nil,
+       (208...209),
+       nil,
+       ArgumentsNode(210...211)([IntegerNode(210...211)()]),
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     OrNode(213...219)(
+       IntegerNode(213...214)(),
+       IntegerNode(218...219)(),
+       (215...217)
+     ),
+     OrNode(221...227)(
+       IntegerNode(221...222)(),
+       IntegerNode(226...227)(),
+       (223...225)
+     ),
+     CallNode(229...238)(
+       IntegerNode(229...230)(),
+       nil,
+       (231...232),
+       nil,
+       ArgumentsNode(233...238)(
+         [CallNode(233...238)(
+            IntegerNode(233...234)(),
+            nil,
+            (235...236),
+            nil,
+            ArgumentsNode(237...238)([IntegerNode(237...238)()]),
+            nil,
+            nil,
+            0,
+            "*"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     ParenthesesNode(240...247)(
+       StatementsNode(241...246)(
+         [CallNode(241...246)(
+            IntegerNode(241...242)(),
+            nil,
+            (243...244),
+            nil,
+            ArgumentsNode(245...246)([IntegerNode(245...246)()]),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       (240...241),
+       (246...247)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/keyword_method_names.txt b/test/yarp/snapshots/keyword_method_names.txt
new file mode 100644
index 0000000000..47e56957ce
--- /dev/null
+++ b/test/yarp/snapshots/keyword_method_names.txt
@@ -0,0 +1,143 @@
+ProgramNode(0...185)(
+  [],
+  StatementsNode(0...185)(
+    [DefNode(0...11)(
+       (4...7),
+       nil,
+       nil,
+       nil,
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (8...11)
+     ),
+     DefNode(13...32)(
+       (22...28),
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+            nil,
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+       ParametersNode(76...84)(
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+     StringNode(123...129)((123...125), (125...128), (128...129), "abc"),
+     DefNode(131...149)(
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+       (131...134),
+       (143...144),
+       nil,
+       nil,
+       nil,
+       (146...149)
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+       (163...164),
+       nil,
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+     ),
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+       nil,
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+     )]
+  )
+)
diff --git a/test/yarp/snapshots/keywords.txt b/test/yarp/snapshots/keywords.txt
new file mode 100644
index 0000000000..8bdd4c642d
--- /dev/null
+++ b/test/yarp/snapshots/keywords.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...51)(
+  [],
+  StatementsNode(0...51)(
+    [RedoNode(0...4)(),
+     RetryNode(6...11)(),
+     SelfNode(13...17)(),
+     SourceEncodingNode(19...31)(),
+     SourceFileNode(33...41)("/fixtures/keywords.txt"),
+     SourceLineNode(43...51)()]
+  )
+)
diff --git a/test/yarp/snapshots/lambda.txt b/test/yarp/snapshots/lambda.txt
new file mode 100644
index 0000000000..9d62e3d079
--- /dev/null
+++ b/test/yarp/snapshots/lambda.txt
@@ -0,0 +1,109 @@
+ProgramNode(0...51)(
+  [],
+  StatementsNode(0...51)(
+    [LambdaNode(0...14)(
+       [:foo],
+       (0...2),
+       BlockParametersNode(2...11)(
+         ParametersNode(6...9)(
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+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
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+         [],
+         (2...3),
+         (10...11)
+       ),
+       nil
+     ),
+     LambdaNode(16...34)(
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+       (16...18),
+       BlockParametersNode(18...30)(
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+           [],
+           [],
+           nil,
+           [KeywordParameterNode(19...29)(
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+              InterpolatedStringNode(22...29)(
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+                [StringNode(23...24)(nil, (23...24), nil, "b"),
+                 EmbeddedStatementsNode(24...28)(
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+                   StatementsNode(26...27)(
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+                        nil,
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+                   ),
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+                 )],
+                (28...29)
+              )
+            )],
+           nil,
+           nil
+         ),
+         [],
+         (18...19),
+         (29...30)
+       ),
+       nil
+     ),
+     LambdaNode(36...51)(
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+       (36...38),
+       BlockParametersNode(38...48)(
+         ParametersNode(39...47)(
+           [],
+           [],
+           [],
+           nil,
+           [KeywordParameterNode(39...47)(
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+              CallNode(42...47)(
+                CallNode(42...43)(
+                  nil,
+                  nil,
+                  (42...43),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "b"
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+                nil,
+                (44...45),
+                nil,
+                ArgumentsNode(46...47)([IntegerNode(46...47)()]),
+                nil,
+                nil,
+                0,
+                "*"
+              )
+            )],
+           nil,
+           nil
+         ),
+         [],
+         (38...39),
+         (47...48)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/method_calls.txt b/test/yarp/snapshots/method_calls.txt
new file mode 100644
index 0000000000..719f07e0eb
--- /dev/null
+++ b/test/yarp/snapshots/method_calls.txt
@@ -0,0 +1,1570 @@
+ProgramNode(0...1187)(
+  [],
+  StatementsNode(0...1187)(
+    [CallNode(0...14)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...4),
+       (4...7),
+       nil,
+       ArgumentsNode(8...14)(
+         [StringNode(8...14)((8...10), (10...13), (13...14), "baz")]
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+       nil,
+       nil,
+       0,
+       "bar"
+     ),
+     CallNode(16...25)(
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+       (17...18),
+       (18...19),
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+       ArgumentsNode(20...24)(
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+          CallNode(23...24)(nil, nil, (23...24), nil, nil, nil, nil, 0, "d")]
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+       0,
+       "b"
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+               nil
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+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(842...878)(
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+       nil,
+       (842...845),
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+       ArgumentsNode(846...871)(
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+            [EmbeddedStatementsNode(847...870)(
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+               StatementsNode(849...869)(
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+          )]
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+       nil,
+       BlockNode(872...878)([], nil, nil, (872...874), (875...878)),
+       0,
+       "foo"
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+     CallNode(880...908)(
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+       nil,
+       ArgumentsNode(884...908)(
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+            StatementsNode(894...904)(
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+       nil,
+       0,
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+       (1042...1045),
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+       ArgumentsNode(1150...1161)(
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+         nil,
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+         nil,
+         nil,
+         nil,
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+         0,
+         "lst"
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+       (1180...1182),
+       nil,
+       ArgumentsNode(1183...1187)(
+         [CallNode(1183...1187)(
+            nil,
+            nil,
+            (1183...1184),
+            nil,
+            nil,
+            nil,
+            BlockNode(1185...1187)([], nil, nil, (1185...1186), (1186...1187)),
+            0,
+            "A"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "<<"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/methods.txt b/test/yarp/snapshots/methods.txt
new file mode 100644
index 0000000000..83bc7e3c5c
--- /dev/null
+++ b/test/yarp/snapshots/methods.txt
@@ -0,0 +1,1406 @@
+ProgramNode(0...1194)(
+  [:a, :c],
+  StatementsNode(0...1194)(
+    [DefNode(0...23)(
+       (4...7),
+       nil,
+       ParametersNode(8...18)(
+         [RequiredDestructuredParameterNode(8...18)(
+            [RequiredParameterNode(9...12)(:bar),
+             RequiredParameterNode(14...17)(:baz)],
+            (8...9),
+            (17...18)
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+       (914...915),
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+       (933...936)
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+       nil,
+       nil,
+       StatementsNode(948...976)(
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+            HashNode(948...950)((948...949), [], (949...950)),
+            (950...951),
+            (951...956),
+            nil,
+            ArgumentsNode(957...976)(
+              [KeywordHashNode(957...976)(
+                 [AssocSplatNode(957...962)(
+                    CallNode(959...962)(
+                      nil,
+                      nil,
+                      (959...962),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "bar"
+                    ),
+                    (957...959)
+                  ),
+                  AssocSplatNode(964...969)(
+                    CallNode(966...969)(
+                      nil,
+                      nil,
+                      (966...969),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "baz"
+                    ),
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+                  AssocSplatNode(971...976)(
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+                      nil,
+                      nil,
+                      (973...976),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "qux"
+                    ),
+                    (971...973)
+                  )]
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "merge"
+          )]
+       ),
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+       (938...941),
+       nil,
+       nil,
+       nil,
+       nil,
+       (977...980)
+     ),
+     DefNode(982...1006)(
+       (986...989),
+       nil,
+       ParametersNode(990...1001)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(990...1001)(
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+            ParenthesesNode(993...1001)(
+              StatementsNode(994...1000)(
+                [RangeNode(994...1000)(
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+                   IntegerNode(998...1000)(),
+                   (995...998),
+                   1
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+              ),
+              (993...994),
+              (1000...1001)
+            )
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+         nil,
+         nil
+       ),
+       nil,
+       [:a],
+       (982...985),
+       nil,
+       (989...990),
+       (1001...1002),
+       nil,
+       (1003...1006)
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+     DefNode(1008...1031)(
+       (1012...1015),
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+       ParametersNode(1016...1026)(
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+         [KeywordParameterNode(1016...1026)(
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+            ParenthesesNode(1019...1026)(
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+                   1
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+              (1019...1020),
+              (1025...1026)
+            )
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+         nil,
+         nil
+       ),
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+       [:a],
+       (1008...1011),
+       nil,
+       (1015...1016),
+       (1026...1027),
+       nil,
+       (1028...1031)
+     ),
+     DefNode(1033...1055)(
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+       nil,
+       ParametersNode(1041...1050)(
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+         [],
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+         nil,
+         [KeywordParameterNode(1041...1050)(
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+            ParenthesesNode(1044...1050)(
+              StatementsNode(1045...1049)(
+                [RangeNode(1045...1049)(
+                   IntegerNode(1045...1046)(),
+                   nil,
+                   (1046...1049),
+                   1
+                 )]
+              ),
+              (1044...1045),
+              (1049...1050)
+            )
+          )],
+         nil,
+         nil
+       ),
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+       (1033...1036),
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+       (1040...1041),
+       (1050...1051),
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+       (1052...1055)
+     ),
+     DefNode(1057...1082)(
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+       nil,
+       ParametersNode(1065...1077)(
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+            (1067...1068),
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+                [RangeNode(1070...1076)(
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+                   IntegerNode(1074...1076)(),
+                   (1071...1074),
+                   1
+                 )]
+              ),
+              (1069...1070),
+              (1076...1077)
+            )
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+         [],
+         nil,
+         [],
+         nil,
+         nil
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+       [:a],
+       (1057...1060),
+       nil,
+       (1064...1065),
+       (1077...1078),
+       nil,
+       (1079...1082)
+     ),
+     DefNode(1084...1108)(
+       (1088...1091),
+       nil,
+       ParametersNode(1092...1103)(
+         [],
+         [OptionalParameterNode(1092...1103)(
+            :a,
+            (1092...1093),
+            (1094...1095),
+            ParenthesesNode(1096...1103)(
+              StatementsNode(1097...1102)(
+                [RangeNode(1097...1102)(
+                   nil,
+                   IntegerNode(1100...1102)(),
+                   (1097...1100),
+                   1
+                 )]
+              ),
+              (1096...1097),
+              (1102...1103)
+            )
+          )],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
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+       [:a],
+       (1084...1087),
+       nil,
+       (1091...1092),
+       (1103...1104),
+       nil,
+       (1105...1108)
+     ),
+     DefNode(1110...1133)(
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+       nil,
+       ParametersNode(1118...1128)(
+         [],
+         [OptionalParameterNode(1118...1128)(
+            :a,
+            (1118...1119),
+            (1120...1121),
+            ParenthesesNode(1122...1128)(
+              StatementsNode(1123...1127)(
+                [RangeNode(1123...1127)(
+                   IntegerNode(1123...1124)(),
+                   nil,
+                   (1124...1127),
+                   1
+                 )]
+              ),
+              (1122...1123),
+              (1127...1128)
+            )
+          )],
+         [],
+         nil,
+         [],
+         nil,
+         nil
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+       nil,
+       [:a],
+       (1110...1113),
+       nil,
+       (1117...1118),
+       (1128...1129),
+       nil,
+       (1130...1133)
+     ),
+     DefNode(1135...1167)(
+       (1139...1145),
+       nil,
+       ParametersNode(1146...1147)(
+         [RequiredParameterNode(1146...1147)(:a)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(1151...1163)(
+         [CallNode(1151...1163)(
+            CallNode(1151...1155)(
+              nil,
+              nil,
+              (1151...1155),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "item"
+            ),
+            nil,
+            (1156...1158),
+            nil,
+            ArgumentsNode(1159...1163)(
+              [CallNode(1159...1163)(
+                 nil,
+                 nil,
+                 (1159...1160),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(1161...1163)(
+                   [],
+                   nil,
+                   nil,
+                   (1161...1162),
+                   (1162...1163)
+                 ),
+                 0,
+                 "a"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            ">>"
+          )]
+       ),
+       [:a],
+       (1135...1138),
+       nil,
+       (1145...1146),
+       (1147...1148),
+       nil,
+       (1164...1167)
+     ),
+     DefNode(1169...1194)(
+       (1173...1176),
+       nil,
+       ParametersNode(1177...1189)(
+         [RequiredParameterNode(1177...1179)(:_a),
+          RequiredParameterNode(1181...1183)(:_a),
+          RequiredParameterNode(1185...1186)(:b),
+          RequiredParameterNode(1188...1189)(:c)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:_a, :b, :c],
+       (1169...1172),
+       nil,
+       (1176...1177),
+       (1189...1190),
+       nil,
+       (1191...1194)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/modules.txt b/test/yarp/snapshots/modules.txt
new file mode 100644
index 0000000000..432d4c9916
--- /dev/null
+++ b/test/yarp/snapshots/modules.txt
@@ -0,0 +1,125 @@
+ProgramNode(0...140)(
+  [],
+  StatementsNode(0...140)(
+    [ModuleNode(0...18)(
+       [:a],
+       (0...6),
+       ConstantReadNode(7...8)(),
+       StatementsNode(9...14)(
+         [LocalVariableWriteNode(9...14)(
+            :a,
+            0,
+            IntegerNode(13...14)(),
+            (9...10),
+            (11...12)
+          )]
+       ),
+       (15...18)
+     ),
+     InterpolatedStringNode(20...38)(
+       (20...23),
+       [StringNode(23...27)(nil, (23...27), nil, "aaa "),
+        EmbeddedStatementsNode(27...33)(
+          (27...29),
+          StatementsNode(29...32)(
+            [CallNode(29...32)(
+               nil,
+               nil,
+               (29...32),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bbb"
+             )]
+          ),
+          (32...33)
+        ),
+        StringNode(33...37)(nil, (33...37), nil, " ccc")],
+       (37...38)
+     ),
+     ModuleNode(40...55)(
+       [],
+       (40...46),
+       ConstantPathNode(47...51)(
+         CallNode(47...48)(nil, nil, (47...48), nil, nil, nil, nil, 0, "m"),
+         ConstantReadNode(50...51)(),
+         (48...50)
+       ),
+       nil,
+       (52...55)
+     ),
+     ModuleNode(57...85)(
+       [:x],
+       (57...63),
+       ConstantReadNode(64...65)(),
+       BeginNode(67...85)(
+         nil,
+         StatementsNode(67...72)(
+           [LocalVariableWriteNode(67...72)(
+              :x,
+              0,
+              IntegerNode(71...72)(),
+              (67...68),
+              (69...70)
+            )]
+         ),
+         RescueNode(74...80)((74...80), [], nil, nil, nil, nil),
+         nil,
+         nil,
+         (82...85)
+       ),
+       (82...85)
+     ),
+     ModuleNode(87...101)(
+       [],
+       (87...93),
+       ConstantPathNode(94...97)(nil, ConstantReadNode(96...97)(), (94...96)),
+       nil,
+       (98...101)
+     ),
+     ModuleNode(103...120)(
+       [],
+       (103...109),
+       ConstantPathNode(110...116)(
+         CallNode(110...113)(
+           ConstantReadNode(110...111)(),
+           nil,
+           (111...113),
+           (111...112),
+           nil,
+           (112...113),
+           nil,
+           0,
+           "[]"
+         ),
+         ConstantReadNode(115...116)(),
+         (113...115)
+       ),
+       nil,
+       (117...120)
+     ),
+     ModuleNode(122...140)(
+       [],
+       (122...128),
+       ConstantPathNode(129...136)(
+         CallNode(129...133)(
+           ConstantReadNode(129...130)(),
+           nil,
+           (130...133),
+           (130...131),
+           ArgumentsNode(131...132)([IntegerNode(131...132)()]),
+           (132...133),
+           nil,
+           0,
+           "[]"
+         ),
+         ConstantReadNode(135...136)(),
+         (133...135)
+       ),
+       nil,
+       (137...140)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/next.txt b/test/yarp/snapshots/next.txt
new file mode 100644
index 0000000000..533cf33bb8
--- /dev/null
+++ b/test/yarp/snapshots/next.txt
@@ -0,0 +1,88 @@
+ProgramNode(0...118)(
+  [],
+  StatementsNode(0...118)(
+    [NextNode(0...4)(nil, (0...4)),
+     NextNode(6...24)(
+       ArgumentsNode(11...24)(
+         [ParenthesesNode(11...14)(
+            StatementsNode(12...13)([IntegerNode(12...13)()]),
+            (11...12),
+            (13...14)
+          ),
+          ParenthesesNode(16...19)(
+            StatementsNode(17...18)([IntegerNode(17...18)()]),
+            (16...17),
+            (18...19)
+          ),
+          ParenthesesNode(21...24)(
+            StatementsNode(22...23)([IntegerNode(22...23)()]),
+            (21...22),
+            (23...24)
+          )]
+       ),
+       (6...10)
+     ),
+     NextNode(26...32)(
+       ArgumentsNode(31...32)([IntegerNode(31...32)()]),
+       (26...30)
+     ),
+     NextNode(34...46)(
+       ArgumentsNode(39...46)(
+         [IntegerNode(39...40)(),
+          IntegerNode(42...43)(),
+          IntegerNode(45...46)()]
+       ),
+       (34...38)
+     ),
+     NextNode(48...60)(
+       ArgumentsNode(53...60)(
+         [IntegerNode(53...54)(),
+          IntegerNode(56...57)(),
+          IntegerNode(59...60)()]
+       ),
+       (48...52)
+     ),
+     NextNode(62...76)(
+       ArgumentsNode(67...76)(
+         [ArrayNode(67...76)(
+            [IntegerNode(68...69)(),
+             IntegerNode(71...72)(),
+             IntegerNode(74...75)()],
+            (67...68),
+            (75...76)
+          )]
+       ),
+       (62...66)
+     ),
+     NextNode(78...93)(
+       ArgumentsNode(82...93)(
+         [ParenthesesNode(82...93)(
+            StatementsNode(86...91)(
+              [IntegerNode(86...87)(), IntegerNode(90...91)()]
+            ),
+            (82...83),
+            (92...93)
+          )]
+       ),
+       (78...82)
+     ),
+     NextNode(95...99)(nil, (95...99)),
+     IntegerNode(100...101)(),
+     NextNode(103...109)(
+       ArgumentsNode(107...109)(
+         [ParenthesesNode(107...109)(nil, (107...108), (108...109))]
+       ),
+       (103...107)
+     ),
+     NextNode(111...118)(
+       ArgumentsNode(115...118)(
+         [ParenthesesNode(115...118)(
+            StatementsNode(116...117)([IntegerNode(116...117)()]),
+            (115...116),
+            (117...118)
+          )]
+       ),
+       (111...115)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/nils.txt b/test/yarp/snapshots/nils.txt
new file mode 100644
index 0000000000..daf9168e7e
--- /dev/null
+++ b/test/yarp/snapshots/nils.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [NilNode(0...3)(),
+     ParenthesesNode(5...7)(nil, (5...6), (6...7)),
+     ParenthesesNode(9...16)(nil, (9...10), (15...16)),
+     PostExecutionNode(18...27)(
+       StatementsNode(24...25)([IntegerNode(24...25)()]),
+       (18...21),
+       (22...23),
+       (26...27)
+     ),
+     PreExecutionNode(29...40)(
+       StatementsNode(37...38)([IntegerNode(37...38)()]),
+       (29...34),
+       (35...36),
+       (39...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/non_alphanumeric_methods.txt b/test/yarp/snapshots/non_alphanumeric_methods.txt
new file mode 100644
index 0000000000..ac2beadd0d
--- /dev/null
+++ b/test/yarp/snapshots/non_alphanumeric_methods.txt
@@ -0,0 +1,477 @@
+ProgramNode(0...434)(
+  [],
+  StatementsNode(0...434)(
+    [DefNode(0...9)(
+       (4...5),
+       nil,
+       nil,
+       nil,
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (6...9)
+     ),
+     DefNode(11...21)(
+       (15...17),
+       nil,
+       nil,
+       nil,
+       [],
+       (11...14),
+       nil,
+       nil,
+       nil,
+       nil,
+       (18...21)
+     ),
+     DefNode(23...33)(
+       (27...29),
+       nil,
+       nil,
+       nil,
+       [],
+       (23...26),
+       nil,
+       nil,
+       nil,
+       nil,
+       (30...33)
+     ),
+     DefNode(35...44)(
+       (39...40),
+       nil,
+       nil,
+       nil,
+       [],
+       (35...38),
+       nil,
+       nil,
+       nil,
+       nil,
+       (41...44)
+     ),
+     DefNode(46...60)(
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+       SelfNode(50...54)(),
+       nil,
+       nil,
+       [],
+       (46...49),
+       (54...55),
+       nil,
+       nil,
+       nil,
+       (57...60)
+     ),
+     DefNode(62...71)(
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+       nil,
+       nil,
+       nil,
+       [],
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+       nil,
+       nil,
+       nil,
+       nil,
+       (68...71)
+     ),
+     DefNode(73...82)(
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+       nil,
+       nil,
+       nil,
+       [],
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+       nil,
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+       nil,
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+       (79...82)
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+     DefNode(84...94)(
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+       nil,
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+     DefNode(104...117)(
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+       nil,
+       ParametersNode(110...113)(
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+       nil,
+       nil,
+       nil,
+       nil,
+       (286...289)
+     ),
+     DefNode(291...302)(
+       (295...298),
+       nil,
+       nil,
+       nil,
+       [],
+       (291...294),
+       nil,
+       nil,
+       nil,
+       nil,
+       (299...302)
+     ),
+     DefNode(304...314)(
+       (308...310),
+       nil,
+       nil,
+       nil,
+       [],
+       (304...307),
+       nil,
+       nil,
+       nil,
+       nil,
+       (311...314)
+     ),
+     DefNode(316...325)(
+       (320...321),
+       nil,
+       nil,
+       nil,
+       [],
+       (316...319),
+       nil,
+       nil,
+       nil,
+       nil,
+       (322...325)
+     ),
+     DefNode(327...337)(
+       (331...333),
+       nil,
+       nil,
+       nil,
+       [],
+       (327...330),
+       nil,
+       nil,
+       nil,
+       nil,
+       (334...337)
+     ),
+     DefNode(339...349)(
+       (343...345),
+       nil,
+       nil,
+       nil,
+       [],
+       (339...342),
+       nil,
+       nil,
+       nil,
+       nil,
+       (346...349)
+     ),
+     DefNode(351...361)(
+       (355...357),
+       nil,
+       nil,
+       nil,
+       [],
+       (351...354),
+       nil,
+       nil,
+       nil,
+       nil,
+       (358...361)
+     ),
+     DefNode(363...374)(
+       (367...370),
+       nil,
+       nil,
+       nil,
+       [],
+       (363...366),
+       nil,
+       nil,
+       nil,
+       nil,
+       (371...374)
+     ),
+     DefNode(376...385)(
+       (380...381),
+       nil,
+       nil,
+       nil,
+       [],
+       (376...379),
+       nil,
+       nil,
+       nil,
+       nil,
+       (382...385)
+     ),
+     DefNode(387...396)(
+       (391...392),
+       nil,
+       nil,
+       nil,
+       [],
+       (387...390),
+       nil,
+       nil,
+       nil,
+       nil,
+       (393...396)
+     ),
+     DefNode(398...412)(
+       (407...408),
+       SelfNode(402...406)(),
+       nil,
+       nil,
+       [],
+       (398...401),
+       (406...407),
+       nil,
+       nil,
+       nil,
+       (409...412)
+     ),
+     DefNode(414...423)(
+       (418...419),
+       nil,
+       nil,
+       nil,
+       [],
+       (414...417),
+       nil,
+       nil,
+       nil,
+       nil,
+       (420...423)
+     ),
+     DefNode(425...434)(
+       (429...430),
+       nil,
+       nil,
+       nil,
+       [],
+       (425...428),
+       nil,
+       nil,
+       nil,
+       nil,
+       (431...434)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/not.txt b/test/yarp/snapshots/not.txt
new file mode 100644
index 0000000000..80ad5dac2e
--- /dev/null
+++ b/test/yarp/snapshots/not.txt
@@ -0,0 +1,151 @@
+ProgramNode(0...125)(
+  [],
+  StatementsNode(0...125)(
+    [AndNode(0...19)(
+       CallNode(0...7)(
+         CallNode(4...7)(nil, nil, (4...7), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (0...3),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       CallNode(12...19)(
+         CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "bar"),
+         nil,
+         (12...15),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       (8...11)
+     ),
+     CallNode(21...37)(
+       AndNode(25...36)(
+         CallNode(25...28)(nil, nil, (25...28), nil, nil, nil, nil, 0, "foo"),
+         CallNode(33...36)(nil, nil, (33...36), nil, nil, nil, nil, 0, "bar"),
+         (29...32)
+       ),
+       nil,
+       (21...24),
+       (24...25),
+       nil,
+       (36...37),
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(39...46)(
+       CallNode(43...46)(nil, nil, (43...46), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (39...42),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     AndNode(48...69)(
+       CallNode(48...55)(
+         CallNode(52...55)(nil, nil, (52...55), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (48...51),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       CallNode(60...69)(
+         CallNode(66...69)(nil, nil, (66...69), nil, nil, nil, nil, 0, "bar"),
+         nil,
+         (60...63),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       (56...59)
+     ),
+     AndNode(72...97)(
+       CallNode(72...79)(
+         CallNode(76...79)(nil, nil, (76...79), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (72...75),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       CallNode(88...97)(
+         CallNode(94...97)(nil, nil, (94...97), nil, nil, nil, nil, 0, "bar"),
+         nil,
+         (88...91),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       (80...83)
+     ),
+     AndNode(100...125)(
+       CallNode(100...107)(
+         CallNode(104...107)(
+           nil,
+           nil,
+           (104...107),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         nil,
+         (100...103),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       CallNode(114...125)(
+         CallNode(122...125)(
+           nil,
+           nil,
+           (122...125),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "bar"
+         ),
+         nil,
+         (114...117),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       (108...111)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/numbers.txt b/test/yarp/snapshots/numbers.txt
new file mode 100644
index 0000000000..04cb532e88
--- /dev/null
+++ b/test/yarp/snapshots/numbers.txt
@@ -0,0 +1,75 @@
+ProgramNode(0...161)(
+  [],
+  StatementsNode(0...161)(
+    [IntegerNode(0...1)(),
+     IntegerNode(3...4)(),
+     FloatNode(6...9)(),
+     IntegerNode(11...12)(),
+     IntegerNode(14...17)(),
+     IntegerNode(19...22)(),
+     IntegerNode(24...28)(),
+     IntegerNode(30...33)(),
+     IntegerNode(35...38)(),
+     IntegerNode(40...43)(),
+     IntegerNode(45...47)(),
+     IntegerNode(49...51)(),
+     IntegerNode(53...55)(),
+     IntegerNode(57...60)(),
+     IntegerNode(62...65)(),
+     IntegerNode(67...70)(),
+     IntegerNode(72...75)(),
+     IntegerNode(77...80)(),
+     IntegerNode(82...85)(),
+     ImaginaryNode(87...89)(IntegerNode(87...88)()),
+     RationalNode(91...93)(IntegerNode(91...92)()),
+     CallNode(95...97)(
+       IntegerNode(96...97)(),
+       nil,
+       (95...96),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     ImaginaryNode(99...102)(RationalNode(99...101)(IntegerNode(99...100)())),
+     ImaginaryNode(104...109)(RationalNode(104...108)(FloatNode(104...107)())),
+     CallNode(111...115)(
+       ImaginaryNode(112...115)(
+         RationalNode(112...114)(IntegerNode(112...113)())
+       ),
+       nil,
+       (111...112),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     CallNode(117...123)(
+       ImaginaryNode(118...123)(
+         RationalNode(118...122)(FloatNode(118...121)())
+       ),
+       nil,
+       (117...118),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     RationalNode(125...129)(IntegerNode(125...128)()),
+     ImaginaryNode(131...135)(IntegerNode(131...134)()),
+     ImaginaryNode(137...142)(
+       RationalNode(137...141)(IntegerNode(137...140)())
+     ),
+     RationalNode(144...148)(IntegerNode(144...147)()),
+     ImaginaryNode(150...154)(IntegerNode(150...153)()),
+     ImaginaryNode(156...161)(
+       RationalNode(156...160)(IntegerNode(156...159)())
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/patterns.txt b/test/yarp/snapshots/patterns.txt
new file mode 100644
index 0000000000..48cc45edc8
--- /dev/null
+++ b/test/yarp/snapshots/patterns.txt
@@ -0,0 +1,4088 @@
+ProgramNode(0...3725)(
+  [:bar, :baz, :qux, :b, :a],
+  StatementsNode(0...3725)(
+    [MatchRequiredNode(0...10)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       LocalVariableWriteNode(7...10)(:bar, 0, nil, (7...10), nil),
+       (4...6)
+     ),
+     MatchRequiredNode(11...19)(
+       CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo"),
+       IntegerNode(18...19)(),
+       (15...17)
+     ),
+     MatchRequiredNode(20...30)(
+       CallNode(20...23)(nil, nil, (20...23), nil, nil, nil, nil, 0, "foo"),
+       FloatNode(27...30)(),
+       (24...26)
+     ),
+     MatchRequiredNode(31...40)(
+       CallNode(31...34)(nil, nil, (31...34), nil, nil, nil, nil, 0, "foo"),
+       ImaginaryNode(38...40)(IntegerNode(38...39)()),
+       (35...37)
+     ),
+     MatchRequiredNode(41...50)(
+       CallNode(41...44)(nil, nil, (41...44), nil, nil, nil, nil, 0, "foo"),
+       RationalNode(48...50)(IntegerNode(48...49)()),
+       (45...47)
+     ),
+     MatchRequiredNode(51...62)(
+       CallNode(51...54)(nil, nil, (51...54), nil, nil, nil, nil, 0, "foo"),
+       SymbolNode(58...62)((58...59), (59...62), nil, "foo"),
+       (55...57)
+     ),
+     MatchRequiredNode(63...77)(
+       CallNode(63...66)(nil, nil, (63...66), nil, nil, nil, nil, 0, "foo"),
+       SymbolNode(70...77)((70...73), (73...76), (76...77), "foo"),
+       (67...69)
+     ),
+     MatchRequiredNode(78...91)(
+       CallNode(78...81)(nil, nil, (78...81), nil, nil, nil, nil, 0, "foo"),
+       InterpolatedSymbolNode(85...91)(
+         (85...87),
+         [StringNode(87...90)(nil, (87...90), nil, "foo")],
+         (90...91)
+       ),
+       (82...84)
+     ),
+     MatchRequiredNode(92...104)(
+       CallNode(92...95)(nil, nil, (92...95), nil, nil, nil, nil, 0, "foo"),
+       RegularExpressionNode(99...104)(
+         (99...100),
+         (100...103),
+         (103...104),
+         "foo",
+         0
+       ),
+       (96...98)
+     ),
+     MatchRequiredNode(105...117)(
+       CallNode(105...108)(
+         nil,
+         nil,
+         (105...108),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       XStringNode(112...117)((112...113), (113...116), (116...117), "foo"),
+       (109...111)
+     ),
+     MatchRequiredNode(118...132)(
+       CallNode(118...121)(
+         nil,
+         nil,
+         (118...121),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       XStringNode(125...132)((125...128), (128...131), (131...132), "foo"),
+       (122...124)
+     ),
+     MatchRequiredNode(133...147)(
+       CallNode(133...136)(
+         nil,
+         nil,
+         (133...136),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(140...147)(
+         [SymbolNode(143...146)(nil, (143...146), nil, "foo")],
+         (140...143),
+         (146...147)
+       ),
+       (137...139)
+     ),
+     MatchRequiredNode(148...162)(
+       CallNode(148...151)(
+         nil,
+         nil,
+         (148...151),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(155...162)(
+         [SymbolNode(158...161)(nil, (158...161), nil, "foo")],
+         (155...158),
+         (161...162)
+       ),
+       (152...154)
+     ),
+     MatchRequiredNode(163...177)(
+       CallNode(163...166)(
+         nil,
+         nil,
+         (163...166),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(170...177)(
+         [StringNode(173...176)(nil, (173...176), nil, "foo")],
+         (170...173),
+         (176...177)
+       ),
+       (167...169)
+     ),
+     MatchRequiredNode(178...192)(
+       CallNode(178...181)(
+         nil,
+         nil,
+         (178...181),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(185...192)(
+         [StringNode(188...191)(nil, (188...191), nil, "foo")],
+         (185...188),
+         (191...192)
+       ),
+       (182...184)
+     ),
+     MatchRequiredNode(193...207)(
+       CallNode(193...196)(
+         nil,
+         nil,
+         (193...196),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StringNode(200...207)((200...203), (203...206), (206...207), "foo"),
+       (197...199)
+     ),
+     MatchRequiredNode(208...222)(
+       CallNode(208...211)(
+         nil,
+         nil,
+         (208...211),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StringNode(215...222)((215...218), (218...221), (221...222), "foo"),
+       (212...214)
+     ),
+     MatchRequiredNode(223...235)(
+       CallNode(223...226)(
+         nil,
+         nil,
+         (223...226),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StringNode(230...235)((230...231), (231...234), (234...235), "foo"),
+       (227...229)
+     ),
+     MatchRequiredNode(236...246)(
+       CallNode(236...239)(
+         nil,
+         nil,
+         (236...239),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       NilNode(243...246)(),
+       (240...242)
+     ),
+     MatchRequiredNode(247...258)(
+       CallNode(247...250)(
+         nil,
+         nil,
+         (247...250),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SelfNode(254...258)(),
+       (251...253)
+     ),
+     MatchRequiredNode(259...270)(
+       CallNode(259...262)(
+         nil,
+         nil,
+         (259...262),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       TrueNode(266...270)(),
+       (263...265)
+     ),
+     MatchRequiredNode(271...283)(
+       CallNode(271...274)(
+         nil,
+         nil,
+         (271...274),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FalseNode(278...283)(),
+       (275...277)
+     ),
+     MatchRequiredNode(284...299)(
+       CallNode(284...287)(
+         nil,
+         nil,
+         (284...287),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SourceFileNode(291...299)("/fixtures/patterns.txt"),
+       (288...290)
+     ),
+     MatchRequiredNode(300...315)(
+       CallNode(300...303)(
+         nil,
+         nil,
+         (300...303),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SourceLineNode(307...315)(),
+       (304...306)
+     ),
+     MatchRequiredNode(316...335)(
+       CallNode(316...319)(
+         nil,
+         nil,
+         (316...319),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SourceEncodingNode(323...335)(),
+       (320...322)
+     ),
+     MatchRequiredNode(336...353)(
+       CallNode(336...339)(
+         nil,
+         nil,
+         (336...339),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       LambdaNode(343...353)(
+         [],
+         (343...345),
+         nil,
+         StatementsNode(348...351)([LocalVariableReadNode(348...351)(:bar, 1)])
+       ),
+       (340...342)
+     ),
+     MatchRequiredNode(355...368)(
+       CallNode(355...358)(
+         nil,
+         nil,
+         (355...358),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(362...368)(
+         IntegerNode(362...363)(),
+         IntegerNode(367...368)(),
+         (364...366),
+         0
+       ),
+       (359...361)
+     ),
+     MatchRequiredNode(369...386)(
+       CallNode(369...372)(
+         nil,
+         nil,
+         (369...372),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(376...386)(
+         FloatNode(376...379)(),
+         FloatNode(383...386)(),
+         (380...382),
+         0
+       ),
+       (373...375)
+     ),
+     MatchRequiredNode(387...402)(
+       CallNode(387...390)(
+         nil,
+         nil,
+         (387...390),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(394...402)(
+         ImaginaryNode(394...396)(IntegerNode(394...395)()),
+         ImaginaryNode(400...402)(IntegerNode(400...401)()),
+         (397...399),
+         0
+       ),
+       (391...393)
+     ),
+     MatchRequiredNode(403...418)(
+       CallNode(403...406)(
+         nil,
+         nil,
+         (403...406),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(410...418)(
+         RationalNode(410...412)(IntegerNode(410...411)()),
+         RationalNode(416...418)(IntegerNode(416...417)()),
+         (413...415),
+         0
+       ),
+       (407...409)
+     ),
+     MatchRequiredNode(419...438)(
+       CallNode(419...422)(
+         nil,
+         nil,
+         (419...422),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(426...438)(
+         SymbolNode(426...430)((426...427), (427...430), nil, "foo"),
+         SymbolNode(434...438)((434...435), (435...438), nil, "foo"),
+         (431...433),
+         0
+       ),
+       (423...425)
+     ),
+     MatchRequiredNode(439...464)(
+       CallNode(439...442)(
+         nil,
+         nil,
+         (439...442),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(446...464)(
+         SymbolNode(446...453)((446...449), (449...452), (452...453), "foo"),
+         SymbolNode(457...464)((457...460), (460...463), (463...464), "foo"),
+         (454...456),
+         0
+       ),
+       (443...445)
+     ),
+     MatchRequiredNode(465...488)(
+       CallNode(465...468)(
+         nil,
+         nil,
+         (465...468),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(472...488)(
+         InterpolatedSymbolNode(472...478)(
+           (472...474),
+           [StringNode(474...477)(nil, (474...477), nil, "foo")],
+           (477...478)
+         ),
+         InterpolatedSymbolNode(482...488)(
+           (482...484),
+           [StringNode(484...487)(nil, (484...487), nil, "foo")],
+           (487...488)
+         ),
+         (479...481),
+         0
+       ),
+       (469...471)
+     ),
+     MatchRequiredNode(489...510)(
+       CallNode(489...492)(
+         nil,
+         nil,
+         (489...492),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(496...510)(
+         RegularExpressionNode(496...501)(
+           (496...497),
+           (497...500),
+           (500...501),
+           "foo",
+           0
+         ),
+         RegularExpressionNode(505...510)(
+           (505...506),
+           (506...509),
+           (509...510),
+           "foo",
+           0
+         ),
+         (502...504),
+         0
+       ),
+       (493...495)
+     ),
+     MatchRequiredNode(511...532)(
+       CallNode(511...514)(
+         nil,
+         nil,
+         (511...514),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(518...532)(
+         XStringNode(518...523)((518...519), (519...522), (522...523), "foo"),
+         XStringNode(527...532)((527...528), (528...531), (531...532), "foo"),
+         (524...526),
+         0
+       ),
+       (515...517)
+     ),
+     MatchRequiredNode(533...558)(
+       CallNode(533...536)(
+         nil,
+         nil,
+         (533...536),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(540...558)(
+         XStringNode(540...547)((540...543), (543...546), (546...547), "foo"),
+         XStringNode(551...558)((551...554), (554...557), (557...558), "foo"),
+         (548...550),
+         0
+       ),
+       (537...539)
+     ),
+     MatchRequiredNode(559...584)(
+       CallNode(559...562)(
+         nil,
+         nil,
+         (559...562),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(566...584)(
+         ArrayNode(566...573)(
+           [SymbolNode(569...572)(nil, (569...572), nil, "foo")],
+           (566...569),
+           (572...573)
+         ),
+         ArrayNode(577...584)(
+           [SymbolNode(580...583)(nil, (580...583), nil, "foo")],
+           (577...580),
+           (583...584)
+         ),
+         (574...576),
+         0
+       ),
+       (563...565)
+     ),
+     MatchRequiredNode(585...610)(
+       CallNode(585...588)(
+         nil,
+         nil,
+         (585...588),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(592...610)(
+         ArrayNode(592...599)(
+           [SymbolNode(595...598)(nil, (595...598), nil, "foo")],
+           (592...595),
+           (598...599)
+         ),
+         ArrayNode(603...610)(
+           [SymbolNode(606...609)(nil, (606...609), nil, "foo")],
+           (603...606),
+           (609...610)
+         ),
+         (600...602),
+         0
+       ),
+       (589...591)
+     ),
+     MatchRequiredNode(611...636)(
+       CallNode(611...614)(
+         nil,
+         nil,
+         (611...614),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(618...636)(
+         ArrayNode(618...625)(
+           [StringNode(621...624)(nil, (621...624), nil, "foo")],
+           (618...621),
+           (624...625)
+         ),
+         ArrayNode(629...636)(
+           [StringNode(632...635)(nil, (632...635), nil, "foo")],
+           (629...632),
+           (635...636)
+         ),
+         (626...628),
+         0
+       ),
+       (615...617)
+     ),
+     MatchRequiredNode(637...662)(
+       CallNode(637...640)(
+         nil,
+         nil,
+         (637...640),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(644...662)(
+         ArrayNode(644...651)(
+           [StringNode(647...650)(nil, (647...650), nil, "foo")],
+           (644...647),
+           (650...651)
+         ),
+         ArrayNode(655...662)(
+           [StringNode(658...661)(nil, (658...661), nil, "foo")],
+           (655...658),
+           (661...662)
+         ),
+         (652...654),
+         0
+       ),
+       (641...643)
+     ),
+     MatchRequiredNode(663...688)(
+       CallNode(663...666)(
+         nil,
+         nil,
+         (663...666),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(670...688)(
+         StringNode(670...677)((670...673), (673...676), (676...677), "foo"),
+         StringNode(681...688)((681...684), (684...687), (687...688), "foo"),
+         (678...680),
+         0
+       ),
+       (667...669)
+     ),
+     MatchRequiredNode(689...714)(
+       CallNode(689...692)(
+         nil,
+         nil,
+         (689...692),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(696...714)(
+         StringNode(696...703)((696...699), (699...702), (702...703), "foo"),
+         StringNode(707...714)((707...710), (710...713), (713...714), "foo"),
+         (704...706),
+         0
+       ),
+       (693...695)
+     ),
+     MatchRequiredNode(715...736)(
+       CallNode(715...718)(
+         nil,
+         nil,
+         (715...718),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(722...736)(
+         StringNode(722...727)((722...723), (723...726), (726...727), "foo"),
+         StringNode(731...736)((731...732), (732...735), (735...736), "foo"),
+         (728...730),
+         0
+       ),
+       (719...721)
+     ),
+     MatchRequiredNode(737...754)(
+       CallNode(737...740)(
+         nil,
+         nil,
+         (737...740),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(744...754)(
+         NilNode(744...747)(),
+         NilNode(751...754)(),
+         (748...750),
+         0
+       ),
+       (741...743)
+     ),
+     MatchRequiredNode(755...774)(
+       CallNode(755...758)(
+         nil,
+         nil,
+         (755...758),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(762...774)(
+         SelfNode(762...766)(),
+         SelfNode(770...774)(),
+         (767...769),
+         0
+       ),
+       (759...761)
+     ),
+     MatchRequiredNode(775...794)(
+       CallNode(775...778)(
+         nil,
+         nil,
+         (775...778),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(782...794)(
+         TrueNode(782...786)(),
+         TrueNode(790...794)(),
+         (787...789),
+         0
+       ),
+       (779...781)
+     ),
+     MatchRequiredNode(795...816)(
+       CallNode(795...798)(
+         nil,
+         nil,
+         (795...798),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(802...816)(
+         FalseNode(802...807)(),
+         FalseNode(811...816)(),
+         (808...810),
+         0
+       ),
+       (799...801)
+     ),
+     MatchRequiredNode(817...844)(
+       CallNode(817...820)(
+         nil,
+         nil,
+         (817...820),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(824...844)(
+         SourceFileNode(824...832)("/fixtures/patterns.txt"),
+         SourceFileNode(836...844)("/fixtures/patterns.txt"),
+         (833...835),
+         0
+       ),
+       (821...823)
+     ),
+     MatchRequiredNode(845...872)(
+       CallNode(845...848)(
+         nil,
+         nil,
+         (845...848),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(852...872)(
+         SourceLineNode(852...860)(),
+         SourceLineNode(864...872)(),
+         (861...863),
+         0
+       ),
+       (849...851)
+     ),
+     MatchRequiredNode(873...908)(
+       CallNode(873...876)(
+         nil,
+         nil,
+         (873...876),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(880...908)(
+         SourceEncodingNode(880...892)(),
+         SourceEncodingNode(896...908)(),
+         (893...895),
+         0
+       ),
+       (877...879)
+     ),
+     MatchRequiredNode(909...940)(
+       CallNode(909...912)(
+         nil,
+         nil,
+         (909...912),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RangeNode(916...940)(
+         LambdaNode(916...926)(
+           [],
+           (916...918),
+           nil,
+           StatementsNode(921...924)(
+             [LocalVariableReadNode(921...924)(:bar, 1)]
+           )
+         ),
+         LambdaNode(930...940)(
+           [],
+           (930...932),
+           nil,
+           StatementsNode(935...938)(
+             [LocalVariableReadNode(935...938)(:bar, 1)]
+           )
+         ),
+         (927...929),
+         0
+       ),
+       (913...915)
+     ),
+     MatchRequiredNode(942...953)(
+       CallNode(942...945)(
+         nil,
+         nil,
+         (942...945),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedVariableNode(949...953)(
+         LocalVariableReadNode(950...953)(:bar, 0),
+         (949...950)
+       ),
+       (946...948)
+     ),
+     MatchRequiredNode(954...966)(
+       CallNode(954...957)(
+         nil,
+         nil,
+         (954...957),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedVariableNode(961...966)(
+         InstanceVariableReadNode(962...966)(),
+         (961...962)
+       ),
+       (958...960)
+     ),
+     MatchRequiredNode(967...980)(
+       CallNode(967...970)(
+         nil,
+         nil,
+         (967...970),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedVariableNode(974...980)(
+         ClassVariableReadNode(975...980)(),
+         (974...975)
+       ),
+       (971...973)
+     ),
+     MatchRequiredNode(981...993)(
+       CallNode(981...984)(
+         nil,
+         nil,
+         (981...984),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedVariableNode(988...993)(
+         GlobalVariableReadNode(989...993)(),
+         (988...989)
+       ),
+       (985...987)
+     ),
+     MatchRequiredNode(995...1006)(
+       CallNode(995...998)(
+         nil,
+         nil,
+         (995...998),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedExpressionNode(1002...1006)(
+         IntegerNode(1004...1005)(),
+         (1002...1003),
+         (1003...1004),
+         (1005...1006)
+       ),
+       (999...1001)
+     ),
+     MatchRequiredNode(1007...1020)(
+       CallNode(1007...1010)(
+         nil,
+         nil,
+         (1007...1010),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedExpressionNode(1014...1020)(
+         NilNode(1016...1019)(),
+         (1014...1015),
+         (1015...1016),
+         (1019...1020)
+       ),
+       (1011...1013)
+     ),
+     MatchRequiredNode(1021...1044)(
+       CallNode(1021...1024)(
+         nil,
+         nil,
+         (1021...1024),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       PinnedExpressionNode(1028...1044)(
+         CallNode(1030...1043)(
+           StringNode(1030...1035)(
+             (1030...1031),
+             (1031...1034),
+             (1034...1035),
+             "bar"
+           ),
+           nil,
+           (1036...1037),
+           nil,
+           ArgumentsNode(1038...1043)(
+             [StringNode(1038...1043)(
+                (1038...1039),
+                (1039...1042),
+                (1042...1043),
+                "baz"
+              )]
+           ),
+           nil,
+           nil,
+           0,
+           "+"
+         ),
+         (1028...1029),
+         (1029...1030),
+         (1043...1044)
+       ),
+       (1025...1027)
+     ),
+     MatchRequiredNode(1046...1056)(
+       CallNode(1046...1049)(
+         nil,
+         nil,
+         (1046...1049),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ConstantReadNode(1053...1056)(),
+       (1050...1052)
+     ),
+     MatchRequiredNode(1057...1077)(
+       CallNode(1057...1060)(
+         nil,
+         nil,
+         (1057...1060),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ConstantPathNode(1064...1077)(
+         ConstantPathNode(1064...1072)(
+           ConstantReadNode(1064...1067)(),
+           ConstantReadNode(1069...1072)(),
+           (1067...1069)
+         ),
+         ConstantReadNode(1074...1077)(),
+         (1072...1074)
+       ),
+       (1061...1063)
+     ),
+     MatchRequiredNode(1078...1090)(
+       CallNode(1078...1081)(
+         nil,
+         nil,
+         (1078...1081),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ConstantPathNode(1085...1090)(
+         nil,
+         ConstantReadNode(1087...1090)(),
+         (1085...1087)
+       ),
+       (1082...1084)
+     ),
+     MatchRequiredNode(1091...1113)(
+       CallNode(1091...1094)(
+         nil,
+         nil,
+         (1091...1094),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ConstantPathNode(1098...1113)(
+         ConstantPathNode(1098...1108)(
+           ConstantPathNode(1098...1103)(
+             nil,
+             ConstantReadNode(1100...1103)(),
+             (1098...1100)
+           ),
+           ConstantReadNode(1105...1108)(),
+           (1103...1105)
+         ),
+         ConstantReadNode(1110...1113)(),
+         (1108...1110)
+       ),
+       (1095...1097)
+     ),
+     MatchRequiredNode(1115...1127)(
+       CallNode(1115...1118)(
+         nil,
+         nil,
+         (1115...1118),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1122...1127)(
+         ConstantReadNode(1122...1125)(),
+         [],
+         nil,
+         [],
+         (1125...1126),
+         (1126...1127)
+       ),
+       (1119...1121)
+     ),
+     MatchRequiredNode(1128...1141)(
+       CallNode(1128...1131)(
+         nil,
+         nil,
+         (1128...1131),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1135...1141)(
+         ConstantReadNode(1135...1138)(),
+         [IntegerNode(1139...1140)()],
+         nil,
+         [],
+         (1138...1139),
+         (1140...1141)
+       ),
+       (1132...1134)
+     ),
+     MatchRequiredNode(1142...1161)(
+       CallNode(1142...1145)(
+         nil,
+         nil,
+         (1142...1145),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1149...1161)(
+         ConstantReadNode(1149...1152)(),
+         [IntegerNode(1153...1154)(),
+          IntegerNode(1156...1157)(),
+          IntegerNode(1159...1160)()],
+         nil,
+         [],
+         (1152...1153),
+         (1160...1161)
+       ),
+       (1146...1148)
+     ),
+     MatchRequiredNode(1162...1177)(
+       CallNode(1162...1165)(
+         nil,
+         nil,
+         (1162...1165),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1169...1177)(
+         ConstantReadNode(1169...1172)(),
+         [LocalVariableWriteNode(1173...1176)(
+            :bar,
+            0,
+            nil,
+            (1173...1176),
+            nil
+          )],
+         nil,
+         [],
+         (1172...1173),
+         (1176...1177)
+       ),
+       (1166...1168)
+     ),
+     MatchRequiredNode(1178...1199)(
+       CallNode(1178...1181)(
+         nil,
+         nil,
+         (1178...1181),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1185...1199)(
+         ConstantReadNode(1185...1188)(),
+         [],
+         SplatNode(1189...1193)(
+           (1189...1190),
+           LocalVariableWriteNode(1190...1193)(
+             :bar,
+             0,
+             nil,
+             (1190...1193),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1195...1198)(
+            :baz,
+            0,
+            nil,
+            (1195...1198),
+            nil
+          )],
+         (1188...1189),
+         (1198...1199)
+       ),
+       (1182...1184)
+     ),
+     MatchRequiredNode(1200...1221)(
+       CallNode(1200...1203)(
+         nil,
+         nil,
+         (1200...1203),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1207...1221)(
+         ConstantReadNode(1207...1210)(),
+         [LocalVariableWriteNode(1211...1214)(
+            :bar,
+            0,
+            nil,
+            (1211...1214),
+            nil
+          )],
+         SplatNode(1216...1220)(
+           (1216...1217),
+           LocalVariableWriteNode(1217...1220)(
+             :baz,
+             0,
+             nil,
+             (1217...1220),
+             nil
+           )
+         ),
+         [],
+         (1210...1211),
+         (1220...1221)
+       ),
+       (1204...1206)
+     ),
+     MatchRequiredNode(1222...1249)(
+       CallNode(1222...1225)(
+         nil,
+         nil,
+         (1222...1225),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FindPatternNode(1229...1249)(
+         ConstantReadNode(1229...1232)(),
+         SplatNode(1233...1237)(
+           (1233...1234),
+           LocalVariableWriteNode(1234...1237)(
+             :bar,
+             0,
+             nil,
+             (1234...1237),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1239...1242)(
+            :baz,
+            0,
+            nil,
+            (1239...1242),
+            nil
+          )],
+         SplatNode(1244...1248)(
+           (1244...1245),
+           LocalVariableWriteNode(1245...1248)(
+             :qux,
+             0,
+             nil,
+             (1245...1248),
+             nil
+           )
+         ),
+         (1232...1233),
+         (1248...1249)
+       ),
+       (1226...1228)
+     ),
+     MatchRequiredNode(1251...1263)(
+       CallNode(1251...1254)(
+         nil,
+         nil,
+         (1251...1254),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1258...1263)(
+         ConstantReadNode(1258...1261)(),
+         [],
+         nil,
+         [],
+         (1261...1262),
+         (1262...1263)
+       ),
+       (1255...1257)
+     ),
+     MatchRequiredNode(1264...1277)(
+       CallNode(1264...1267)(
+         nil,
+         nil,
+         (1264...1267),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1271...1277)(
+         ConstantReadNode(1271...1274)(),
+         [IntegerNode(1275...1276)()],
+         nil,
+         [],
+         (1274...1275),
+         (1276...1277)
+       ),
+       (1268...1270)
+     ),
+     MatchRequiredNode(1278...1297)(
+       CallNode(1278...1281)(
+         nil,
+         nil,
+         (1278...1281),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1285...1297)(
+         ConstantReadNode(1285...1288)(),
+         [IntegerNode(1289...1290)(),
+          IntegerNode(1292...1293)(),
+          IntegerNode(1295...1296)()],
+         nil,
+         [],
+         (1288...1289),
+         (1296...1297)
+       ),
+       (1282...1284)
+     ),
+     MatchRequiredNode(1298...1313)(
+       CallNode(1298...1301)(
+         nil,
+         nil,
+         (1298...1301),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1305...1313)(
+         ConstantReadNode(1305...1308)(),
+         [LocalVariableWriteNode(1309...1312)(
+            :bar,
+            0,
+            nil,
+            (1309...1312),
+            nil
+          )],
+         nil,
+         [],
+         (1308...1309),
+         (1312...1313)
+       ),
+       (1302...1304)
+     ),
+     MatchRequiredNode(1314...1335)(
+       CallNode(1314...1317)(
+         nil,
+         nil,
+         (1314...1317),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1321...1335)(
+         ConstantReadNode(1321...1324)(),
+         [],
+         SplatNode(1325...1329)(
+           (1325...1326),
+           LocalVariableWriteNode(1326...1329)(
+             :bar,
+             0,
+             nil,
+             (1326...1329),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1331...1334)(
+            :baz,
+            0,
+            nil,
+            (1331...1334),
+            nil
+          )],
+         (1324...1325),
+         (1334...1335)
+       ),
+       (1318...1320)
+     ),
+     MatchRequiredNode(1336...1357)(
+       CallNode(1336...1339)(
+         nil,
+         nil,
+         (1336...1339),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1343...1357)(
+         ConstantReadNode(1343...1346)(),
+         [LocalVariableWriteNode(1347...1350)(
+            :bar,
+            0,
+            nil,
+            (1347...1350),
+            nil
+          )],
+         SplatNode(1352...1356)(
+           (1352...1353),
+           LocalVariableWriteNode(1353...1356)(
+             :baz,
+             0,
+             nil,
+             (1353...1356),
+             nil
+           )
+         ),
+         [],
+         (1346...1347),
+         (1356...1357)
+       ),
+       (1340...1342)
+     ),
+     MatchRequiredNode(1358...1385)(
+       CallNode(1358...1361)(
+         nil,
+         nil,
+         (1358...1361),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FindPatternNode(1365...1385)(
+         ConstantReadNode(1365...1368)(),
+         SplatNode(1369...1373)(
+           (1369...1370),
+           LocalVariableWriteNode(1370...1373)(
+             :bar,
+             0,
+             nil,
+             (1370...1373),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1375...1378)(
+            :baz,
+            0,
+            nil,
+            (1375...1378),
+            nil
+          )],
+         SplatNode(1380...1384)(
+           (1380...1381),
+           LocalVariableWriteNode(1381...1384)(
+             :qux,
+             0,
+             nil,
+             (1381...1384),
+             nil
+           )
+         ),
+         (1368...1369),
+         (1384...1385)
+       ),
+       (1362...1364)
+     ),
+     MatchRequiredNode(1387...1398)(
+       CallNode(1387...1390)(
+         nil,
+         nil,
+         (1387...1390),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1394...1398)(
+         nil,
+         [],
+         SplatNode(1394...1398)(
+           (1394...1395),
+           LocalVariableWriteNode(1395...1398)(
+             :bar,
+             0,
+             nil,
+             (1395...1398),
+             nil
+           )
+         ),
+         [],
+         nil,
+         nil
+       ),
+       (1391...1393)
+     ),
+     MatchRequiredNode(1399...1420)(
+       CallNode(1399...1402)(
+         nil,
+         nil,
+         (1399...1402),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1406...1420)(
+         nil,
+         [],
+         SplatNode(1406...1410)(
+           (1406...1407),
+           LocalVariableWriteNode(1407...1410)(
+             :bar,
+             0,
+             nil,
+             (1407...1410),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1412...1415)(
+            :baz,
+            0,
+            nil,
+            (1412...1415),
+            nil
+          ),
+          LocalVariableWriteNode(1417...1420)(
+            :qux,
+            0,
+            nil,
+            (1417...1420),
+            nil
+          )],
+         nil,
+         nil
+       ),
+       (1403...1405)
+     ),
+     MatchRequiredNode(1421...1442)(
+       CallNode(1421...1424)(
+         nil,
+         nil,
+         (1421...1424),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1428...1442)(
+         nil,
+         [LocalVariableWriteNode(1428...1431)(
+            :bar,
+            0,
+            nil,
+            (1428...1431),
+            nil
+          )],
+         SplatNode(1433...1437)(
+           (1433...1434),
+           LocalVariableWriteNode(1434...1437)(
+             :baz,
+             0,
+             nil,
+             (1434...1437),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1439...1442)(
+            :qux,
+            0,
+            nil,
+            (1439...1442),
+            nil
+          )],
+         nil,
+         nil
+       ),
+       (1425...1427)
+     ),
+     MatchRequiredNode(1443...1464)(
+       CallNode(1443...1446)(
+         nil,
+         nil,
+         (1443...1446),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1450...1464)(
+         nil,
+         [LocalVariableWriteNode(1450...1453)(
+            :bar,
+            0,
+            nil,
+            (1450...1453),
+            nil
+          ),
+          LocalVariableWriteNode(1455...1458)(
+            :baz,
+            0,
+            nil,
+            (1455...1458),
+            nil
+          )],
+         SplatNode(1460...1464)(
+           (1460...1461),
+           LocalVariableWriteNode(1461...1464)(
+             :qux,
+             0,
+             nil,
+             (1461...1464),
+             nil
+           )
+         ),
+         [],
+         nil,
+         nil
+       ),
+       (1447...1449)
+     ),
+     MatchRequiredNode(1465...1487)(
+       CallNode(1465...1468)(
+         nil,
+         nil,
+         (1465...1468),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FindPatternNode(1472...1487)(
+         nil,
+         SplatNode(1472...1476)(
+           (1472...1473),
+           LocalVariableWriteNode(1473...1476)(
+             :bar,
+             0,
+             nil,
+             (1473...1476),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1478...1481)(
+            :baz,
+            0,
+            nil,
+            (1478...1481),
+            nil
+          )],
+         SplatNode(1483...1487)(
+           (1483...1484),
+           LocalVariableWriteNode(1484...1487)(
+             :qux,
+             0,
+             nil,
+             (1484...1487),
+             nil
+           )
+         ),
+         nil,
+         nil
+       ),
+       (1469...1471)
+     ),
+     MatchRequiredNode(1489...1498)(
+       CallNode(1489...1492)(
+         nil,
+         nil,
+         (1489...1492),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1496...1498)(
+         nil,
+         [],
+         nil,
+         [],
+         (1496...1497),
+         (1497...1498)
+       ),
+       (1493...1495)
+     ),
+     MatchRequiredNode(1499...1516)(
+       CallNode(1499...1502)(
+         nil,
+         nil,
+         (1499...1502),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1506...1516)(
+         nil,
+         [ArrayPatternNode(1507...1515)(
+            nil,
+            [ArrayPatternNode(1508...1514)(
+               nil,
+               [ArrayPatternNode(1509...1513)(
+                  nil,
+                  [ArrayPatternNode(1510...1512)(
+                     nil,
+                     [],
+                     nil,
+                     [],
+                     (1510...1511),
+                     (1511...1512)
+                   )],
+                  nil,
+                  [],
+                  (1509...1510),
+                  (1512...1513)
+                )],
+               nil,
+               [],
+               (1508...1509),
+               (1513...1514)
+             )],
+            nil,
+            [],
+            (1507...1508),
+            (1514...1515)
+          )],
+         nil,
+         [],
+         (1506...1507),
+         (1515...1516)
+       ),
+       (1503...1505)
+     ),
+     MatchRequiredNode(1518...1531)(
+       CallNode(1518...1521)(
+         nil,
+         nil,
+         (1518...1521),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1525...1531)(
+         nil,
+         [],
+         SplatNode(1526...1530)(
+           (1526...1527),
+           LocalVariableWriteNode(1527...1530)(
+             :bar,
+             0,
+             nil,
+             (1527...1530),
+             nil
+           )
+         ),
+         [],
+         (1525...1526),
+         (1530...1531)
+       ),
+       (1522...1524)
+     ),
+     MatchRequiredNode(1532...1555)(
+       CallNode(1532...1535)(
+         nil,
+         nil,
+         (1532...1535),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1539...1555)(
+         nil,
+         [],
+         SplatNode(1540...1544)(
+           (1540...1541),
+           LocalVariableWriteNode(1541...1544)(
+             :bar,
+             0,
+             nil,
+             (1541...1544),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1546...1549)(
+            :baz,
+            0,
+            nil,
+            (1546...1549),
+            nil
+          ),
+          LocalVariableWriteNode(1551...1554)(
+            :qux,
+            0,
+            nil,
+            (1551...1554),
+            nil
+          )],
+         (1539...1540),
+         (1554...1555)
+       ),
+       (1536...1538)
+     ),
+     MatchRequiredNode(1556...1579)(
+       CallNode(1556...1559)(
+         nil,
+         nil,
+         (1556...1559),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1563...1579)(
+         nil,
+         [LocalVariableWriteNode(1564...1567)(
+            :bar,
+            0,
+            nil,
+            (1564...1567),
+            nil
+          )],
+         SplatNode(1569...1573)(
+           (1569...1570),
+           LocalVariableWriteNode(1570...1573)(
+             :baz,
+             0,
+             nil,
+             (1570...1573),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1575...1578)(
+            :qux,
+            0,
+            nil,
+            (1575...1578),
+            nil
+          )],
+         (1563...1564),
+         (1578...1579)
+       ),
+       (1560...1562)
+     ),
+     MatchRequiredNode(1580...1603)(
+       CallNode(1580...1583)(
+         nil,
+         nil,
+         (1580...1583),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayPatternNode(1587...1603)(
+         nil,
+         [LocalVariableWriteNode(1588...1591)(
+            :bar,
+            0,
+            nil,
+            (1588...1591),
+            nil
+          ),
+          LocalVariableWriteNode(1593...1596)(
+            :baz,
+            0,
+            nil,
+            (1593...1596),
+            nil
+          )],
+         SplatNode(1598...1602)(
+           (1598...1599),
+           LocalVariableWriteNode(1599...1602)(
+             :qux,
+             0,
+             nil,
+             (1599...1602),
+             nil
+           )
+         ),
+         [],
+         (1587...1588),
+         (1602...1603)
+       ),
+       (1584...1586)
+     ),
+     MatchRequiredNode(1604...1628)(
+       CallNode(1604...1607)(
+         nil,
+         nil,
+         (1604...1607),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FindPatternNode(1611...1628)(
+         nil,
+         SplatNode(1612...1616)(
+           (1612...1613),
+           LocalVariableWriteNode(1613...1616)(
+             :bar,
+             0,
+             nil,
+             (1613...1616),
+             nil
+           )
+         ),
+         [LocalVariableWriteNode(1618...1621)(
+            :baz,
+            0,
+            nil,
+            (1618...1621),
+            nil
+          )],
+         SplatNode(1623...1627)(
+           (1623...1624),
+           LocalVariableWriteNode(1624...1627)(
+             :qux,
+             0,
+             nil,
+             (1624...1627),
+             nil
+           )
+         ),
+         (1611...1612),
+         (1627...1628)
+       ),
+       (1608...1610)
+     ),
+     MatchPredicateNode(1630...1640)(
+       CallNode(1630...1633)(
+         nil,
+         nil,
+         (1630...1633),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       LocalVariableWriteNode(1637...1640)(:bar, 0, nil, (1637...1640), nil),
+       (1634...1636)
+     ),
+     MatchPredicateNode(1641...1649)(
+       CallNode(1641...1644)(
+         nil,
+         nil,
+         (1641...1644),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       IntegerNode(1648...1649)(),
+       (1645...1647)
+     ),
+     MatchPredicateNode(1650...1660)(
+       CallNode(1650...1653)(
+         nil,
+         nil,
+         (1650...1653),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FloatNode(1657...1660)(),
+       (1654...1656)
+     ),
+     MatchPredicateNode(1661...1670)(
+       CallNode(1661...1664)(
+         nil,
+         nil,
+         (1661...1664),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ImaginaryNode(1668...1670)(IntegerNode(1668...1669)()),
+       (1665...1667)
+     ),
+     MatchPredicateNode(1671...1680)(
+       CallNode(1671...1674)(
+         nil,
+         nil,
+         (1671...1674),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RationalNode(1678...1680)(IntegerNode(1678...1679)()),
+       (1675...1677)
+     ),
+     MatchPredicateNode(1681...1692)(
+       CallNode(1681...1684)(
+         nil,
+         nil,
+         (1681...1684),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SymbolNode(1688...1692)((1688...1689), (1689...1692), nil, "foo"),
+       (1685...1687)
+     ),
+     MatchPredicateNode(1693...1707)(
+       CallNode(1693...1696)(
+         nil,
+         nil,
+         (1693...1696),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SymbolNode(1700...1707)(
+         (1700...1703),
+         (1703...1706),
+         (1706...1707),
+         "foo"
+       ),
+       (1697...1699)
+     ),
+     MatchPredicateNode(1708...1721)(
+       CallNode(1708...1711)(
+         nil,
+         nil,
+         (1708...1711),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       InterpolatedSymbolNode(1715...1721)(
+         (1715...1717),
+         [StringNode(1717...1720)(nil, (1717...1720), nil, "foo")],
+         (1720...1721)
+       ),
+       (1712...1714)
+     ),
+     MatchPredicateNode(1722...1734)(
+       CallNode(1722...1725)(
+         nil,
+         nil,
+         (1722...1725),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       RegularExpressionNode(1729...1734)(
+         (1729...1730),
+         (1730...1733),
+         (1733...1734),
+         "foo",
+         0
+       ),
+       (1726...1728)
+     ),
+     MatchPredicateNode(1735...1747)(
+       CallNode(1735...1738)(
+         nil,
+         nil,
+         (1735...1738),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       XStringNode(1742...1747)(
+         (1742...1743),
+         (1743...1746),
+         (1746...1747),
+         "foo"
+       ),
+       (1739...1741)
+     ),
+     MatchPredicateNode(1748...1762)(
+       CallNode(1748...1751)(
+         nil,
+         nil,
+         (1748...1751),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       XStringNode(1755...1762)(
+         (1755...1758),
+         (1758...1761),
+         (1761...1762),
+         "foo"
+       ),
+       (1752...1754)
+     ),
+     MatchPredicateNode(1763...1777)(
+       CallNode(1763...1766)(
+         nil,
+         nil,
+         (1763...1766),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(1770...1777)(
+         [SymbolNode(1773...1776)(nil, (1773...1776), nil, "foo")],
+         (1770...1773),
+         (1776...1777)
+       ),
+       (1767...1769)
+     ),
+     MatchPredicateNode(1778...1792)(
+       CallNode(1778...1781)(
+         nil,
+         nil,
+         (1778...1781),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(1785...1792)(
+         [SymbolNode(1788...1791)(nil, (1788...1791), nil, "foo")],
+         (1785...1788),
+         (1791...1792)
+       ),
+       (1782...1784)
+     ),
+     MatchPredicateNode(1793...1807)(
+       CallNode(1793...1796)(
+         nil,
+         nil,
+         (1793...1796),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(1800...1807)(
+         [StringNode(1803...1806)(nil, (1803...1806), nil, "foo")],
+         (1800...1803),
+         (1806...1807)
+       ),
+       (1797...1799)
+     ),
+     MatchPredicateNode(1808...1822)(
+       CallNode(1808...1811)(
+         nil,
+         nil,
+         (1808...1811),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       ArrayNode(1815...1822)(
+         [StringNode(1818...1821)(nil, (1818...1821), nil, "foo")],
+         (1815...1818),
+         (1821...1822)
+       ),
+       (1812...1814)
+     ),
+     MatchPredicateNode(1823...1837)(
+       CallNode(1823...1826)(
+         nil,
+         nil,
+         (1823...1826),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StringNode(1830...1837)(
+         (1830...1833),
+         (1833...1836),
+         (1836...1837),
+         "foo"
+       ),
+       (1827...1829)
+     ),
+     MatchPredicateNode(1838...1852)(
+       CallNode(1838...1841)(
+         nil,
+         nil,
+         (1838...1841),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StringNode(1845...1852)(
+         (1845...1848),
+         (1848...1851),
+         (1851...1852),
+         "foo"
+       ),
+       (1842...1844)
+     ),
+     MatchPredicateNode(1853...1865)(
+       CallNode(1853...1856)(
+         nil,
+         nil,
+         (1853...1856),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StringNode(1860...1865)(
+         (1860...1861),
+         (1861...1864),
+         (1864...1865),
+         "foo"
+       ),
+       (1857...1859)
+     ),
+     MatchPredicateNode(1866...1876)(
+       CallNode(1866...1869)(
+         nil,
+         nil,
+         (1866...1869),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       NilNode(1873...1876)(),
+       (1870...1872)
+     ),
+     MatchPredicateNode(1877...1888)(
+       CallNode(1877...1880)(
+         nil,
+         nil,
+         (1877...1880),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SelfNode(1884...1888)(),
+       (1881...1883)
+     ),
+     MatchPredicateNode(1889...1900)(
+       CallNode(1889...1892)(
+         nil,
+         nil,
+         (1889...1892),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       TrueNode(1896...1900)(),
+       (1893...1895)
+     ),
+     MatchPredicateNode(1901...1913)(
+       CallNode(1901...1904)(
+         nil,
+         nil,
+         (1901...1904),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       FalseNode(1908...1913)(),
+       (1905...1907)
+     ),
+     MatchPredicateNode(1914...1929)(
+       CallNode(1914...1917)(
+         nil,
+         nil,
+         (1914...1917),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SourceFileNode(1921...1929)("/fixtures/patterns.txt"),
+       (1918...1920)
+     ),
+     MatchPredicateNode(1930...1945)(
+       CallNode(1930...1933)(
+         nil,
+         nil,
+         (1930...1933),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SourceLineNode(1937...1945)(),
+       (1934...1936)
+     ),
+     MatchPredicateNode(1946...1965)(
+       CallNode(1946...1949)(
+         nil,
+         nil,
+         (1946...1949),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       SourceEncodingNode(1953...1965)(),
+       (1950...1952)
+     ),
+     MatchPredicateNode(1966...1983)(
+       CallNode(1966...1969)(
+         nil,
+         nil,
+         (1966...1969),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       LambdaNode(1973...1983)(
+         [],
+         (1973...1975),
+         nil,
+         StatementsNode(1978...1981)(
+           [LocalVariableReadNode(1978...1981)(:bar, 1)]
+         )
+       ),
+       (1970...1972)
+     ),
+     CaseNode(1985...2010)(
+       CallNode(1990...1993)(
+         nil,
+         nil,
+         (1990...1993),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(1995...2006)(
+          LocalVariableWriteNode(1998...2001)(
+            :bar,
+            0,
+            nil,
+            (1998...2001),
+            nil
+          ),
+          nil,
+          (1995...1997),
+          (2002...2006)
+        )],
+       nil,
+       (1985...1989),
+       (2007...2010)
+     ),
+     CaseNode(2011...2034)(
+       CallNode(2016...2019)(
+         nil,
+         nil,
+         (2016...2019),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2021...2030)(
+          IntegerNode(2024...2025)(),
+          nil,
+          (2021...2023),
+          (2026...2030)
+        )],
+       nil,
+       (2011...2015),
+       (2031...2034)
+     ),
+     CaseNode(2035...2060)(
+       CallNode(2040...2043)(
+         nil,
+         nil,
+         (2040...2043),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2045...2056)(
+          FloatNode(2048...2051)(),
+          nil,
+          (2045...2047),
+          (2052...2056)
+        )],
+       nil,
+       (2035...2039),
+       (2057...2060)
+     ),
+     CaseNode(2061...2085)(
+       CallNode(2066...2069)(
+         nil,
+         nil,
+         (2066...2069),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2071...2081)(
+          ImaginaryNode(2074...2076)(IntegerNode(2074...2075)()),
+          nil,
+          (2071...2073),
+          (2077...2081)
+        )],
+       nil,
+       (2061...2065),
+       (2082...2085)
+     ),
+     CaseNode(2086...2110)(
+       CallNode(2091...2094)(
+         nil,
+         nil,
+         (2091...2094),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2096...2106)(
+          RationalNode(2099...2101)(IntegerNode(2099...2100)()),
+          nil,
+          (2096...2098),
+          (2102...2106)
+        )],
+       nil,
+       (2086...2090),
+       (2107...2110)
+     ),
+     CaseNode(2111...2137)(
+       CallNode(2116...2119)(
+         nil,
+         nil,
+         (2116...2119),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2121...2133)(
+          SymbolNode(2124...2128)((2124...2125), (2125...2128), nil, "foo"),
+          nil,
+          (2121...2123),
+          (2129...2133)
+        )],
+       nil,
+       (2111...2115),
+       (2134...2137)
+     ),
+     CaseNode(2138...2167)(
+       CallNode(2143...2146)(
+         nil,
+         nil,
+         (2143...2146),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2148...2163)(
+          SymbolNode(2151...2158)(
+            (2151...2154),
+            (2154...2157),
+            (2157...2158),
+            "foo"
+          ),
+          nil,
+          (2148...2150),
+          (2159...2163)
+        )],
+       nil,
+       (2138...2142),
+       (2164...2167)
+     ),
+     CaseNode(2168...2196)(
+       CallNode(2173...2176)(
+         nil,
+         nil,
+         (2173...2176),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2178...2192)(
+          InterpolatedSymbolNode(2181...2187)(
+            (2181...2183),
+            [StringNode(2183...2186)(nil, (2183...2186), nil, "foo")],
+            (2186...2187)
+          ),
+          nil,
+          (2178...2180),
+          (2188...2192)
+        )],
+       nil,
+       (2168...2172),
+       (2193...2196)
+     ),
+     CaseNode(2197...2224)(
+       CallNode(2202...2205)(
+         nil,
+         nil,
+         (2202...2205),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2207...2220)(
+          RegularExpressionNode(2210...2215)(
+            (2210...2211),
+            (2211...2214),
+            (2214...2215),
+            "foo",
+            0
+          ),
+          nil,
+          (2207...2209),
+          (2216...2220)
+        )],
+       nil,
+       (2197...2201),
+       (2221...2224)
+     ),
+     CaseNode(2225...2252)(
+       CallNode(2230...2233)(
+         nil,
+         nil,
+         (2230...2233),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2235...2248)(
+          XStringNode(2238...2243)(
+            (2238...2239),
+            (2239...2242),
+            (2242...2243),
+            "foo"
+          ),
+          nil,
+          (2235...2237),
+          (2244...2248)
+        )],
+       nil,
+       (2225...2229),
+       (2249...2252)
+     ),
+     CaseNode(2253...2282)(
+       CallNode(2258...2261)(
+         nil,
+         nil,
+         (2258...2261),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2263...2278)(
+          XStringNode(2266...2273)(
+            (2266...2269),
+            (2269...2272),
+            (2272...2273),
+            "foo"
+          ),
+          nil,
+          (2263...2265),
+          (2274...2278)
+        )],
+       nil,
+       (2253...2257),
+       (2279...2282)
+     ),
+     CaseNode(2283...2312)(
+       CallNode(2288...2291)(
+         nil,
+         nil,
+         (2288...2291),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2293...2308)(
+          ArrayNode(2296...2303)(
+            [SymbolNode(2299...2302)(nil, (2299...2302), nil, "foo")],
+            (2296...2299),
+            (2302...2303)
+          ),
+          nil,
+          (2293...2295),
+          (2304...2308)
+        )],
+       nil,
+       (2283...2287),
+       (2309...2312)
+     ),
+     CaseNode(2313...2342)(
+       CallNode(2318...2321)(
+         nil,
+         nil,
+         (2318...2321),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2323...2338)(
+          ArrayNode(2326...2333)(
+            [SymbolNode(2329...2332)(nil, (2329...2332), nil, "foo")],
+            (2326...2329),
+            (2332...2333)
+          ),
+          nil,
+          (2323...2325),
+          (2334...2338)
+        )],
+       nil,
+       (2313...2317),
+       (2339...2342)
+     ),
+     CaseNode(2343...2372)(
+       CallNode(2348...2351)(
+         nil,
+         nil,
+         (2348...2351),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2353...2368)(
+          ArrayNode(2356...2363)(
+            [StringNode(2359...2362)(nil, (2359...2362), nil, "foo")],
+            (2356...2359),
+            (2362...2363)
+          ),
+          nil,
+          (2353...2355),
+          (2364...2368)
+        )],
+       nil,
+       (2343...2347),
+       (2369...2372)
+     ),
+     CaseNode(2373...2402)(
+       CallNode(2378...2381)(
+         nil,
+         nil,
+         (2378...2381),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2383...2398)(
+          ArrayNode(2386...2393)(
+            [StringNode(2389...2392)(nil, (2389...2392), nil, "foo")],
+            (2386...2389),
+            (2392...2393)
+          ),
+          nil,
+          (2383...2385),
+          (2394...2398)
+        )],
+       nil,
+       (2373...2377),
+       (2399...2402)
+     ),
+     CaseNode(2403...2432)(
+       CallNode(2408...2411)(
+         nil,
+         nil,
+         (2408...2411),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2413...2428)(
+          StringNode(2416...2423)(
+            (2416...2419),
+            (2419...2422),
+            (2422...2423),
+            "foo"
+          ),
+          nil,
+          (2413...2415),
+          (2424...2428)
+        )],
+       nil,
+       (2403...2407),
+       (2429...2432)
+     ),
+     CaseNode(2433...2462)(
+       CallNode(2438...2441)(
+         nil,
+         nil,
+         (2438...2441),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2443...2458)(
+          StringNode(2446...2453)(
+            (2446...2449),
+            (2449...2452),
+            (2452...2453),
+            "foo"
+          ),
+          nil,
+          (2443...2445),
+          (2454...2458)
+        )],
+       nil,
+       (2433...2437),
+       (2459...2462)
+     ),
+     CaseNode(2463...2490)(
+       CallNode(2468...2471)(
+         nil,
+         nil,
+         (2468...2471),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2473...2486)(
+          StringNode(2476...2481)(
+            (2476...2477),
+            (2477...2480),
+            (2480...2481),
+            "foo"
+          ),
+          nil,
+          (2473...2475),
+          (2482...2486)
+        )],
+       nil,
+       (2463...2467),
+       (2487...2490)
+     ),
+     CaseNode(2491...2516)(
+       CallNode(2496...2499)(
+         nil,
+         nil,
+         (2496...2499),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2501...2512)(
+          NilNode(2504...2507)(),
+          nil,
+          (2501...2503),
+          (2508...2512)
+        )],
+       nil,
+       (2491...2495),
+       (2513...2516)
+     ),
+     CaseNode(2517...2543)(
+       CallNode(2522...2525)(
+         nil,
+         nil,
+         (2522...2525),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2527...2539)(
+          SelfNode(2530...2534)(),
+          nil,
+          (2527...2529),
+          (2535...2539)
+        )],
+       nil,
+       (2517...2521),
+       (2540...2543)
+     ),
+     CaseNode(2544...2570)(
+       CallNode(2549...2552)(
+         nil,
+         nil,
+         (2549...2552),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2554...2566)(
+          TrueNode(2557...2561)(),
+          nil,
+          (2554...2556),
+          (2562...2566)
+        )],
+       nil,
+       (2544...2548),
+       (2567...2570)
+     ),
+     CaseNode(2571...2598)(
+       CallNode(2576...2579)(
+         nil,
+         nil,
+         (2576...2579),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2581...2594)(
+          FalseNode(2584...2589)(),
+          nil,
+          (2581...2583),
+          (2590...2594)
+        )],
+       nil,
+       (2571...2575),
+       (2595...2598)
+     ),
+     CaseNode(2599...2629)(
+       CallNode(2604...2607)(
+         nil,
+         nil,
+         (2604...2607),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2609...2625)(
+          SourceFileNode(2612...2620)("/fixtures/patterns.txt"),
+          nil,
+          (2609...2611),
+          (2621...2625)
+        )],
+       nil,
+       (2599...2603),
+       (2626...2629)
+     ),
+     CaseNode(2630...2660)(
+       CallNode(2635...2638)(
+         nil,
+         nil,
+         (2635...2638),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2640...2656)(
+          SourceLineNode(2643...2651)(),
+          nil,
+          (2640...2642),
+          (2652...2656)
+        )],
+       nil,
+       (2630...2634),
+       (2657...2660)
+     ),
+     CaseNode(2661...2695)(
+       CallNode(2666...2669)(
+         nil,
+         nil,
+         (2666...2669),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2671...2691)(
+          SourceEncodingNode(2674...2686)(),
+          nil,
+          (2671...2673),
+          (2687...2691)
+        )],
+       nil,
+       (2661...2665),
+       (2692...2695)
+     ),
+     CaseNode(2696...2728)(
+       CallNode(2701...2704)(
+         nil,
+         nil,
+         (2701...2704),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2706...2724)(
+          LambdaNode(2709...2719)(
+            [],
+            (2709...2711),
+            nil,
+            StatementsNode(2714...2717)(
+              [LocalVariableReadNode(2714...2717)(:bar, 1)]
+            )
+          ),
+          nil,
+          (2706...2708),
+          (2720...2724)
+        )],
+       nil,
+       (2696...2700),
+       (2725...2728)
+     ),
+     CaseNode(2730...2762)(
+       CallNode(2735...2738)(
+         nil,
+         nil,
+         (2735...2738),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2740...2758)(
+          IfNode(2743...2753)(
+            (2747...2749),
+            LocalVariableReadNode(2750...2753)(:baz, 0),
+            StatementsNode(2743...2746)(
+              [LocalVariableWriteNode(2743...2746)(
+                 :bar,
+                 0,
+                 nil,
+                 (2743...2746),
+                 nil
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (2740...2742),
+          (2754...2758)
+        )],
+       nil,
+       (2730...2734),
+       (2759...2762)
+     ),
+     CaseNode(2763...2793)(
+       CallNode(2768...2771)(
+         nil,
+         nil,
+         (2768...2771),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2773...2789)(
+          IfNode(2776...2784)(
+            (2778...2780),
+            LocalVariableReadNode(2781...2784)(:baz, 0),
+            StatementsNode(2776...2777)([IntegerNode(2776...2777)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (2773...2775),
+          (2785...2789)
+        )],
+       nil,
+       (2763...2767),
+       (2790...2793)
+     ),
+     CaseNode(2794...2826)(
+       CallNode(2799...2802)(
+         nil,
+         nil,
+         (2799...2802),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2804...2822)(
+          IfNode(2807...2817)(
+            (2811...2813),
+            LocalVariableReadNode(2814...2817)(:baz, 0),
+            StatementsNode(2807...2810)([FloatNode(2807...2810)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (2804...2806),
+          (2818...2822)
+        )],
+       nil,
+       (2794...2798),
+       (2823...2826)
+     ),
+     CaseNode(2827...2858)(
+       CallNode(2832...2835)(
+         nil,
+         nil,
+         (2832...2835),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2837...2854)(
+          IfNode(2840...2849)(
+            (2843...2845),
+            LocalVariableReadNode(2846...2849)(:baz, 0),
+            StatementsNode(2840...2842)(
+              [ImaginaryNode(2840...2842)(IntegerNode(2840...2841)())]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (2837...2839),
+          (2850...2854)
+        )],
+       nil,
+       (2827...2831),
+       (2855...2858)
+     ),
+     CaseNode(2859...2890)(
+       CallNode(2864...2867)(
+         nil,
+         nil,
+         (2864...2867),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(2869...2886)(
+          IfNode(2872...2881)(
+            (2875...2877),
+            LocalVariableReadNode(2878...2881)(:baz, 0),
+            StatementsNode(2872...2874)(
+              [RationalNode(2872...2874)(IntegerNode(2872...2873)())]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (2869...2871),
+          (2882...2886)
+        )],
+       nil,
+       (2859...2863),
+       (2887...2890)
+     ),
+     CaseNode(2891...2924)(
+       CallNode(2896...2899)(
+         nil,
+         nil,
+         (2896...2899),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
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+       [InNode(2901...2920)(
+          IfNode(2904...2915)(
+            (2909...2911),
+            LocalVariableReadNode(2912...2915)(:baz, 0),
+            StatementsNode(2904...2908)(
+              [SymbolNode(2904...2908)(
+                 (2904...2905),
+                 (2905...2908),
+                 nil,
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (2901...2903),
+          (2916...2920)
+        )],
+       nil,
+       (2891...2895),
+       (2921...2924)
+     ),
+     CaseNode(2925...2961)(
+       CallNode(2930...2933)(
+         nil,
+         nil,
+         (2930...2933),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
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+       [InNode(2935...2957)(
+          IfNode(2938...2952)(
+            (2946...2948),
+            LocalVariableReadNode(2949...2952)(:baz, 0),
+            StatementsNode(2938...2945)(
+              [SymbolNode(2938...2945)(
+                 (2938...2941),
+                 (2941...2944),
+                 (2944...2945),
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
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+          nil,
+          (2935...2937),
+          (2953...2957)
+        )],
+       nil,
+       (2925...2929),
+       (2958...2961)
+     ),
+     CaseNode(2962...2997)(
+       CallNode(2967...2970)(
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+         nil,
+         (2967...2970),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
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+       [InNode(2972...2993)(
+          IfNode(2975...2988)(
+            (2982...2984),
+            LocalVariableReadNode(2985...2988)(:baz, 0),
+            StatementsNode(2975...2981)(
+              [InterpolatedSymbolNode(2975...2981)(
+                 (2975...2977),
+                 [StringNode(2977...2980)(nil, (2977...2980), nil, "foo")],
+                 (2980...2981)
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (2972...2974),
+          (2989...2993)
+        )],
+       nil,
+       (2962...2966),
+       (2994...2997)
+     ),
+     CaseNode(2998...3032)(
+       CallNode(3003...3006)(
+         nil,
+         nil,
+         (3003...3006),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3008...3028)(
+          IfNode(3011...3023)(
+            (3017...3019),
+            LocalVariableReadNode(3020...3023)(:baz, 0),
+            StatementsNode(3011...3016)(
+              [RegularExpressionNode(3011...3016)(
+                 (3011...3012),
+                 (3012...3015),
+                 (3015...3016),
+                 "foo",
+                 0
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3008...3010),
+          (3024...3028)
+        )],
+       nil,
+       (2998...3002),
+       (3029...3032)
+     ),
+     CaseNode(3033...3067)(
+       CallNode(3038...3041)(
+         nil,
+         nil,
+         (3038...3041),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3043...3063)(
+          IfNode(3046...3058)(
+            (3052...3054),
+            LocalVariableReadNode(3055...3058)(:baz, 0),
+            StatementsNode(3046...3051)(
+              [XStringNode(3046...3051)(
+                 (3046...3047),
+                 (3047...3050),
+                 (3050...3051),
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3043...3045),
+          (3059...3063)
+        )],
+       nil,
+       (3033...3037),
+       (3064...3067)
+     ),
+     CaseNode(3068...3104)(
+       CallNode(3073...3076)(
+         nil,
+         nil,
+         (3073...3076),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3078...3100)(
+          IfNode(3081...3095)(
+            (3089...3091),
+            LocalVariableReadNode(3092...3095)(:baz, 0),
+            StatementsNode(3081...3088)(
+              [XStringNode(3081...3088)(
+                 (3081...3084),
+                 (3084...3087),
+                 (3087...3088),
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3078...3080),
+          (3096...3100)
+        )],
+       nil,
+       (3068...3072),
+       (3101...3104)
+     ),
+     CaseNode(3105...3141)(
+       CallNode(3110...3113)(
+         nil,
+         nil,
+         (3110...3113),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3115...3137)(
+          IfNode(3118...3132)(
+            (3126...3128),
+            LocalVariableReadNode(3129...3132)(:baz, 0),
+            StatementsNode(3118...3125)(
+              [ArrayNode(3118...3125)(
+                 [SymbolNode(3121...3124)(nil, (3121...3124), nil, "foo")],
+                 (3118...3121),
+                 (3124...3125)
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3115...3117),
+          (3133...3137)
+        )],
+       nil,
+       (3105...3109),
+       (3138...3141)
+     ),
+     CaseNode(3142...3178)(
+       CallNode(3147...3150)(
+         nil,
+         nil,
+         (3147...3150),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3152...3174)(
+          IfNode(3155...3169)(
+            (3163...3165),
+            LocalVariableReadNode(3166...3169)(:baz, 0),
+            StatementsNode(3155...3162)(
+              [ArrayNode(3155...3162)(
+                 [SymbolNode(3158...3161)(nil, (3158...3161), nil, "foo")],
+                 (3155...3158),
+                 (3161...3162)
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3152...3154),
+          (3170...3174)
+        )],
+       nil,
+       (3142...3146),
+       (3175...3178)
+     ),
+     CaseNode(3179...3215)(
+       CallNode(3184...3187)(
+         nil,
+         nil,
+         (3184...3187),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3189...3211)(
+          IfNode(3192...3206)(
+            (3200...3202),
+            LocalVariableReadNode(3203...3206)(:baz, 0),
+            StatementsNode(3192...3199)(
+              [ArrayNode(3192...3199)(
+                 [StringNode(3195...3198)(nil, (3195...3198), nil, "foo")],
+                 (3192...3195),
+                 (3198...3199)
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3189...3191),
+          (3207...3211)
+        )],
+       nil,
+       (3179...3183),
+       (3212...3215)
+     ),
+     CaseNode(3216...3252)(
+       CallNode(3221...3224)(
+         nil,
+         nil,
+         (3221...3224),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3226...3248)(
+          IfNode(3229...3243)(
+            (3237...3239),
+            LocalVariableReadNode(3240...3243)(:baz, 0),
+            StatementsNode(3229...3236)(
+              [ArrayNode(3229...3236)(
+                 [StringNode(3232...3235)(nil, (3232...3235), nil, "foo")],
+                 (3229...3232),
+                 (3235...3236)
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3226...3228),
+          (3244...3248)
+        )],
+       nil,
+       (3216...3220),
+       (3249...3252)
+     ),
+     CaseNode(3253...3289)(
+       CallNode(3258...3261)(
+         nil,
+         nil,
+         (3258...3261),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3263...3285)(
+          IfNode(3266...3280)(
+            (3274...3276),
+            LocalVariableReadNode(3277...3280)(:baz, 0),
+            StatementsNode(3266...3273)(
+              [StringNode(3266...3273)(
+                 (3266...3269),
+                 (3269...3272),
+                 (3272...3273),
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3263...3265),
+          (3281...3285)
+        )],
+       nil,
+       (3253...3257),
+       (3286...3289)
+     ),
+     CaseNode(3290...3326)(
+       CallNode(3295...3298)(
+         nil,
+         nil,
+         (3295...3298),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3300...3322)(
+          IfNode(3303...3317)(
+            (3311...3313),
+            LocalVariableReadNode(3314...3317)(:baz, 0),
+            StatementsNode(3303...3310)(
+              [StringNode(3303...3310)(
+                 (3303...3306),
+                 (3306...3309),
+                 (3309...3310),
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3300...3302),
+          (3318...3322)
+        )],
+       nil,
+       (3290...3294),
+       (3323...3326)
+     ),
+     CaseNode(3327...3361)(
+       CallNode(3332...3335)(
+         nil,
+         nil,
+         (3332...3335),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3337...3357)(
+          IfNode(3340...3352)(
+            (3346...3348),
+            LocalVariableReadNode(3349...3352)(:baz, 0),
+            StatementsNode(3340...3345)(
+              [StringNode(3340...3345)(
+                 (3340...3341),
+                 (3341...3344),
+                 (3344...3345),
+                 "foo"
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3337...3339),
+          (3353...3357)
+        )],
+       nil,
+       (3327...3331),
+       (3358...3361)
+     ),
+     CaseNode(3362...3394)(
+       CallNode(3367...3370)(
+         nil,
+         nil,
+         (3367...3370),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3372...3390)(
+          IfNode(3375...3385)(
+            (3379...3381),
+            LocalVariableReadNode(3382...3385)(:baz, 0),
+            StatementsNode(3375...3378)([NilNode(3375...3378)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (3372...3374),
+          (3386...3390)
+        )],
+       nil,
+       (3362...3366),
+       (3391...3394)
+     ),
+     CaseNode(3395...3428)(
+       CallNode(3400...3403)(
+         nil,
+         nil,
+         (3400...3403),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3405...3424)(
+          IfNode(3408...3419)(
+            (3413...3415),
+            LocalVariableReadNode(3416...3419)(:baz, 0),
+            StatementsNode(3408...3412)([SelfNode(3408...3412)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (3405...3407),
+          (3420...3424)
+        )],
+       nil,
+       (3395...3399),
+       (3425...3428)
+     ),
+     CaseNode(3429...3462)(
+       CallNode(3434...3437)(
+         nil,
+         nil,
+         (3434...3437),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3439...3458)(
+          IfNode(3442...3453)(
+            (3447...3449),
+            LocalVariableReadNode(3450...3453)(:baz, 0),
+            StatementsNode(3442...3446)([TrueNode(3442...3446)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (3439...3441),
+          (3454...3458)
+        )],
+       nil,
+       (3429...3433),
+       (3459...3462)
+     ),
+     CaseNode(3463...3497)(
+       CallNode(3468...3471)(
+         nil,
+         nil,
+         (3468...3471),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3473...3493)(
+          IfNode(3476...3488)(
+            (3482...3484),
+            LocalVariableReadNode(3485...3488)(:baz, 0),
+            StatementsNode(3476...3481)([FalseNode(3476...3481)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (3473...3475),
+          (3489...3493)
+        )],
+       nil,
+       (3463...3467),
+       (3494...3497)
+     ),
+     CaseNode(3498...3535)(
+       CallNode(3503...3506)(
+         nil,
+         nil,
+         (3503...3506),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3508...3531)(
+          IfNode(3511...3526)(
+            (3520...3522),
+            LocalVariableReadNode(3523...3526)(:baz, 0),
+            StatementsNode(3511...3519)(
+              [SourceFileNode(3511...3519)("/fixtures/patterns.txt")]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3508...3510),
+          (3527...3531)
+        )],
+       nil,
+       (3498...3502),
+       (3532...3535)
+     ),
+     CaseNode(3536...3573)(
+       CallNode(3541...3544)(
+         nil,
+         nil,
+         (3541...3544),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3546...3569)(
+          IfNode(3549...3564)(
+            (3558...3560),
+            LocalVariableReadNode(3561...3564)(:baz, 0),
+            StatementsNode(3549...3557)([SourceLineNode(3549...3557)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (3546...3548),
+          (3565...3569)
+        )],
+       nil,
+       (3536...3540),
+       (3570...3573)
+     ),
+     CaseNode(3574...3615)(
+       CallNode(3579...3582)(
+         nil,
+         nil,
+         (3579...3582),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3584...3611)(
+          IfNode(3587...3606)(
+            (3600...3602),
+            LocalVariableReadNode(3603...3606)(:baz, 0),
+            StatementsNode(3587...3599)([SourceEncodingNode(3587...3599)()]),
+            nil,
+            nil
+          ),
+          nil,
+          (3584...3586),
+          (3607...3611)
+        )],
+       nil,
+       (3574...3578),
+       (3612...3615)
+     ),
+     CaseNode(3616...3655)(
+       CallNode(3621...3624)(
+         nil,
+         nil,
+         (3621...3624),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(3626...3651)(
+          IfNode(3629...3646)(
+            (3640...3642),
+            LocalVariableReadNode(3643...3646)(:baz, 0),
+            StatementsNode(3629...3639)(
+              [LambdaNode(3629...3639)(
+                 [],
+                 (3629...3631),
+                 nil,
+                 StatementsNode(3634...3637)(
+                   [LocalVariableReadNode(3634...3637)(:bar, 1)]
+                 )
+               )]
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (3626...3628),
+          (3647...3651)
+        )],
+       nil,
+       (3616...3620),
+       (3652...3655)
+     ),
+     IfNode(3657...3671)(
+       (3657...3659),
+       MatchPredicateNode(3660...3667)(
+         CallNode(3660...3661)(
+           nil,
+           nil,
+           (3660...3661),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "a"
+         ),
+         ArrayPatternNode(3665...3667)(
+           nil,
+           [],
+           nil,
+           [],
+           (3665...3666),
+           (3666...3667)
+         ),
+         (3662...3664)
+       ),
+       nil,
+       nil,
+       (3668...3671)
+     ),
+     MatchRequiredNode(3673...3685)(
+       CallNode(3673...3674)(
+         nil,
+         nil,
+         (3673...3674),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a"
+       ),
+       ArrayPatternNode(3678...3685)(
+         nil,
+         [LocalVariableWriteNode(3682...3683)(:b, 0, nil, (3682...3683), nil)],
+         nil,
+         [],
+         (3678...3679),
+         (3684...3685)
+       ),
+       (3675...3677)
+     ),
+     MatchPredicateNode(3687...3725)(
+       CallNode(3687...3690)(
+         nil,
+         nil,
+         (3687...3690),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       HashPatternNode(3694...3725)(
+         ConstantReadNode(3694...3695)(),
+         [AssocNode(3699...3723)(
+            SymbolNode(3699...3703)(nil, (3699...3702), (3702...3703), "bar"),
+            HashPatternNode(3704...3723)(
+              ConstantReadNode(3704...3705)(),
+              [AssocNode(3711...3719)(
+                 SymbolNode(3711...3717)(
+                   nil,
+                   (3711...3716),
+                   (3716...3717),
+                   "value"
+                 ),
+                 LocalVariableWriteNode(3718...3719)(
+                   :a,
+                   0,
+                   nil,
+                   (3718...3719),
+                   nil
+                 ),
+                 nil
+               )],
+              nil,
+              (3705...3706),
+              (3722...3723)
+            ),
+            nil
+          )],
+         nil,
+         (3695...3696),
+         (3724...3725)
+       ),
+       (3691...3693)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/procs.txt b/test/yarp/snapshots/procs.txt
new file mode 100644
index 0000000000..0e02784453
--- /dev/null
+++ b/test/yarp/snapshots/procs.txt
@@ -0,0 +1,218 @@
+ProgramNode(0...266)(
+  [],
+  StatementsNode(0...266)(
+    [LambdaNode(0...21)(
+       [:a, :b, :c, :d],
+       (0...2),
+       BlockParametersNode(3...15)(
+         ParametersNode(4...5)(
+           [RequiredParameterNode(4...5)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [(7...8), (10...11), (13...14)],
+         (3...4),
+         (14...15)
+       ),
+       StatementsNode(18...19)([LocalVariableReadNode(18...19)(:b, 0)])
+     ),
+     LambdaNode(23...39)(
+       [],
+       (23...25),
+       nil,
+       BeginNode(29...39)(
+         nil,
+         nil,
+         nil,
+         nil,
+         EnsureNode(29...39)((29...35), nil, (36...39)),
+         (36...39)
+       )
+     ),
+     LambdaNode(41...69)(
+       [],
+       (41...43),
+       nil,
+       BeginNode(47...69)(
+         nil,
+         nil,
+         RescueNode(47...53)((47...53), [], nil, nil, nil, nil),
+         ElseNode(54...65)((54...58), nil, (59...65)),
+         EnsureNode(59...69)((59...65), nil, (66...69)),
+         (66...69)
+       )
+     ),
+     LambdaNode(71...81)(
+       [],
+       (71...73),
+       nil,
+       StatementsNode(76...79)(
+         [CallNode(76...79)(nil, nil, (76...79), nil, nil, nil, nil, 0, "foo")]
+       )
+     ),
+     LambdaNode(83...98)(
+       [],
+       (83...85),
+       nil,
+       StatementsNode(90...93)(
+         [CallNode(90...93)(nil, nil, (90...93), nil, nil, nil, nil, 0, "foo")]
+       )
+     ),
+     LambdaNode(100...129)(
+       [:a, :b, :c, :d, :e],
+       (100...102),
+       BlockParametersNode(103...123)(
+         ParametersNode(103...123)(
+           [RequiredParameterNode(103...104)(:a)],
+           [OptionalParameterNode(106...111)(
+              :b,
+              (106...107),
+              (108...109),
+              IntegerNode(110...111)()
+            )],
+           [],
+           nil,
+           [KeywordParameterNode(113...115)((113...115), nil),
+            KeywordParameterNode(117...119)((117...119), nil)],
+           nil,
+           BlockParameterNode(121...123)((122...123), (121...122))
+         ),
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(126...127)([LocalVariableReadNode(126...127)(:a, 0)])
+     ),
+     LambdaNode(131...171)(
+       [:a, :b, :c, :d, :e, :f, :g],
+       (131...133),
+       BlockParametersNode(134...165)(
+         ParametersNode(135...164)(
+           [RequiredParameterNode(135...136)(:a)],
+           [OptionalParameterNode(138...143)(
+              :b,
+              (138...139),
+              (140...141),
+              IntegerNode(142...143)()
+            )],
+           [],
+           RestParameterNode(145...147)((145...146), (146...147)),
+           [KeywordParameterNode(149...151)((149...151), nil),
+            KeywordParameterNode(153...155)((153...155), nil)],
+           KeywordRestParameterNode(157...160)((157...159), (159...160)),
+           BlockParameterNode(162...164)((163...164), (162...163))
+         ),
+         [],
+         (134...135),
+         (164...165)
+       ),
+       StatementsNode(168...169)([LocalVariableReadNode(168...169)(:a, 0)])
+     ),
+     LambdaNode(173...218)(
+       [:a, :b, :c, :d, :e, :f, :g],
+       (173...175),
+       BlockParametersNode(176...207)(
+         ParametersNode(177...206)(
+           [RequiredParameterNode(177...178)(:a)],
+           [OptionalParameterNode(180...185)(
+              :b,
+              (180...181),
+              (182...183),
+              IntegerNode(184...185)()
+            )],
+           [],
+           RestParameterNode(187...189)((187...188), (188...189)),
+           [KeywordParameterNode(191...193)((191...193), nil),
+            KeywordParameterNode(195...197)((195...197), nil)],
+           KeywordRestParameterNode(199...202)((199...201), (201...202)),
+           BlockParameterNode(204...206)((205...206), (204...205))
+         ),
+         [],
+         (176...177),
+         (206...207)
+       ),
+       StatementsNode(213...214)([LocalVariableReadNode(213...214)(:a, 0)])
+     ),
+     LambdaNode(220...245)(
+       [:a],
+       (220...222),
+       BlockParametersNode(223...226)(
+         ParametersNode(224...225)(
+           [RequiredParameterNode(224...225)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (223...224),
+         (225...226)
+       ),
+       StatementsNode(229...243)(
+         [LambdaNode(229...243)(
+            [:b],
+            (229...231),
+            BlockParametersNode(232...233)(
+              ParametersNode(232...233)(
+                [RequiredParameterNode(232...233)(:b)],
+                [],
+                [],
+                nil,
+                [],
+                nil,
+                nil
+              ),
+              [],
+              nil,
+              nil
+            ),
+            StatementsNode(236...241)(
+              [CallNode(236...241)(
+                 LocalVariableReadNode(236...237)(:a, 1),
+                 nil,
+                 (238...239),
+                 nil,
+                 ArgumentsNode(240...241)(
+                   [LocalVariableReadNode(240...241)(:b, 0)]
+                 ),
+                 nil,
+                 nil,
+                 0,
+                 "*"
+               )]
+            )
+          )]
+       )
+     ),
+     LambdaNode(247...266)(
+       [:a, :b, :c],
+       (247...249),
+       BlockParametersNode(250...262)(
+         ParametersNode(251...261)(
+           [RequiredDestructuredParameterNode(251...257)(
+              [RequiredParameterNode(252...253)(:a),
+               RequiredParameterNode(255...256)(:b)],
+              (251...252),
+              (256...257)
+            )],
+           [],
+           [],
+           RestParameterNode(259...261)((259...260), (260...261)),
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (250...251),
+         (261...262)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/range_begin_open_exclusive.txt b/test/yarp/snapshots/range_begin_open_exclusive.txt
new file mode 100644
index 0000000000..50a6593c46
--- /dev/null
+++ b/test/yarp/snapshots/range_begin_open_exclusive.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [RangeNode(0...4)(nil, IntegerNode(3...4)(), (0...3), 1)]
+  )
+)
diff --git a/test/yarp/snapshots/range_begin_open_inclusive.txt b/test/yarp/snapshots/range_begin_open_inclusive.txt
new file mode 100644
index 0000000000..7d09381f30
--- /dev/null
+++ b/test/yarp/snapshots/range_begin_open_inclusive.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)(
+    [RangeNode(0...3)(nil, IntegerNode(2...3)(), (0...2), 0)]
+  )
+)
diff --git a/test/yarp/snapshots/range_end_open_exclusive.txt b/test/yarp/snapshots/range_end_open_exclusive.txt
new file mode 100644
index 0000000000..3da37b123c
--- /dev/null
+++ b/test/yarp/snapshots/range_end_open_exclusive.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [RangeNode(0...4)(IntegerNode(0...1)(), nil, (1...4), 1)]
+  )
+)
diff --git a/test/yarp/snapshots/range_end_open_inclusive.txt b/test/yarp/snapshots/range_end_open_inclusive.txt
new file mode 100644
index 0000000000..e1b90bdffc
--- /dev/null
+++ b/test/yarp/snapshots/range_end_open_inclusive.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)(
+    [RangeNode(0...3)(IntegerNode(0...1)(), nil, (1...3), 0)]
+  )
+)
diff --git a/test/yarp/snapshots/ranges.txt b/test/yarp/snapshots/ranges.txt
new file mode 100644
index 0000000000..d78044bab0
--- /dev/null
+++ b/test/yarp/snapshots/ranges.txt
@@ -0,0 +1,106 @@
+ProgramNode(0...85)(
+  [],
+  StatementsNode(0...85)(
+    [ParenthesesNode(0...6)(
+       StatementsNode(1...5)(
+         [RangeNode(1...5)(nil, IntegerNode(4...5)(), (1...4), 1)]
+       ),
+       (0...1),
+       (5...6)
+     ),
+     ParenthesesNode(8...13)(
+       StatementsNode(9...12)(
+         [RangeNode(9...12)(nil, IntegerNode(11...12)(), (9...11), 0)]
+       ),
+       (8...9),
+       (12...13)
+     ),
+     RangeNode(15...20)(
+       IntegerNode(15...16)(),
+       IntegerNode(19...20)(),
+       (16...19),
+       1
+     ),
+     CallNode(22...31)(
+       CallNode(22...25)(nil, nil, (22...25), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (25...31),
+       (25...26),
+       ArgumentsNode(26...30)(
+         [RangeNode(26...30)(nil, IntegerNode(29...30)(), (26...29), 1)]
+       ),
+       (30...31),
+       nil,
+       0,
+       "[]"
+     ),
+     HashNode(33...48)(
+       (33...34),
+       [AssocNode(35...46)(
+          SymbolNode(35...39)(nil, (35...38), (38...39), "foo"),
+          RangeNode(40...46)(
+            nil,
+            CallNode(43...46)(
+              nil,
+              nil,
+              (43...46),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            (40...43),
+            1
+          ),
+          nil
+        )],
+       (47...48)
+     ),
+     ParenthesesNode(50...56)(
+       StatementsNode(51...55)(
+         [RangeNode(51...55)(IntegerNode(51...52)(), nil, (52...55), 1)]
+       ),
+       (50...51),
+       (55...56)
+     ),
+     RangeNode(58...62)(
+       IntegerNode(58...59)(),
+       IntegerNode(61...62)(),
+       (59...61),
+       0
+     ),
+     HashNode(64...78)(
+       (64...65),
+       [AssocNode(66...76)(
+          SymbolNode(66...70)(nil, (66...69), (69...70), "foo"),
+          RangeNode(71...76)(
+            nil,
+            CallNode(73...76)(
+              nil,
+              nil,
+              (73...76),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            (71...73),
+            0
+          ),
+          nil
+        )],
+       (77...78)
+     ),
+     ParenthesesNode(80...85)(
+       StatementsNode(81...84)(
+         [RangeNode(81...84)(IntegerNode(81...82)(), nil, (82...84), 0)]
+       ),
+       (80...81),
+       (84...85)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/regex.txt b/test/yarp/snapshots/regex.txt
new file mode 100644
index 0000000000..b53f35df2a
--- /dev/null
+++ b/test/yarp/snapshots/regex.txt
@@ -0,0 +1,143 @@
+ProgramNode(0...278)(
+  [:foo],
+  StatementsNode(0...278)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...9)(
+         [RegularExpressionNode(4...9)((4...5), (5...8), (8...9), "bar", 0)]
+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     RegularExpressionNode(11...19)((11...14), (14...17), (17...19), "abc", 1),
+     RegularExpressionNode(21...26)((21...22), (22...25), (25...26), "a\b", 0),
+     InterpolatedRegularExpressionNode(28...39)(
+       (28...29),
+       [StringNode(29...33)(nil, (29...33), nil, "aaa "),
+        EmbeddedVariableNode(33...38)(
+          (33...34),
+          GlobalVariableReadNode(34...38)()
+        )],
+       (38...39),
+       0
+     ),
+     InterpolatedRegularExpressionNode(41...57)(
+       (41...42),
+       [StringNode(42...46)(nil, (42...46), nil, "aaa "),
+        EmbeddedStatementsNode(46...52)(
+          (46...48),
+          StatementsNode(48...51)(
+            [CallNode(48...51)(
+               nil,
+               nil,
+               (48...51),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bbb"
+             )]
+          ),
+          (51...52)
+        ),
+        StringNode(52...56)(nil, (52...56), nil, " ccc")],
+       (56...57),
+       0
+     ),
+     ArrayNode(59...86)(
+       [CallNode(60...80)(
+          RegularExpressionNode(60...73)(
+            (60...61),
+            (61...72),
+            (72...73),
+            "(?<foo>bar)",
+            0
+          ),
+          nil,
+          (74...76),
+          nil,
+          ArgumentsNode(77...80)(
+            [CallNode(77...80)(
+               nil,
+               nil,
+               (77...80),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "baz"
+             )]
+          ),
+          nil,
+          nil,
+          0,
+          "=~"
+        ),
+        LocalVariableReadNode(82...85)(:foo, 0)],
+       (59...60),
+       (85...86)
+     ),
+     RegularExpressionNode(88...94)((88...89), (89...92), (92...94), "abc", 1),
+     RegularExpressionNode(96...122)(
+       (96...99),
+       (99...120),
+       (120...122),
+       "[a-z$._?][w$.?\#@~]*:",
+       1
+     ),
+     RegularExpressionNode(124...161)(
+       (124...127),
+       (127...159),
+       (159...161),
+       "([a-z$._?][w$.?\#@~]*)( +)(equ)",
+       1
+     ),
+     RegularExpressionNode(163...188)(
+       (163...166),
+       (166...186),
+       (186...188),
+       "[a-z$._?][w$.?\#@~]*",
+       1
+     ),
+     RegularExpressionNode(190...249)(
+       (190...193),
+       (193...248),
+       (248...249),
+       "\n" + "(?:[w\#$%_']|()|(,)|[]|[0-9])*\n" + "  (?:[w\#$%_']+)\n",
+       0
+     ),
+     CallNode(251...267)(
+       RegularExpressionNode(251...259)(
+         (251...252),
+         (252...258),
+         (258...259),
+         "(?#))",
+         0
+       ),
+       nil,
+       (260...262),
+       nil,
+       ArgumentsNode(263...267)(
+         [StringNode(263...267)((263...264), (264...266), (266...267), "hi")]
+       ),
+       nil,
+       nil,
+       0,
+       "=~"
+     ),
+     RegularExpressionNode(269...278)(
+       (269...272),
+       (272...277),
+       (277...278),
+       "pound",
+       0
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/rescue.txt b/test/yarp/snapshots/rescue.txt
new file mode 100644
index 0000000000..01887935e8
--- /dev/null
+++ b/test/yarp/snapshots/rescue.txt
@@ -0,0 +1,306 @@
+ProgramNode(0...316)(
+  [:a],
+  StatementsNode(0...316)(
+    [RescueModifierNode(0...14)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (4...10),
+       NilNode(11...14)()
+     ),
+     RescueModifierNode(16...30)(
+       CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "foo"),
+       (20...26),
+       NilNode(27...30)()
+     ),
+     RescueModifierNode(32...48)(
+       BreakNode(32...37)(nil, (32...37)),
+       (38...44),
+       NilNode(45...48)()
+     ),
+     RescueModifierNode(50...65)(
+       NextNode(50...54)(nil, (50...54)),
+       (55...61),
+       NilNode(62...65)()
+     ),
+     RescueModifierNode(67...84)(
+       ReturnNode(67...73)((67...73), nil),
+       (74...80),
+       NilNode(81...84)()
+     ),
+     RescueModifierNode(86...105)(
+       CallNode(86...89)(nil, nil, (86...89), nil, nil, nil, nil, 0, "foo"),
+       (90...96),
+       OrNode(97...105)(
+         NilNode(97...100)(),
+         IntegerNode(104...105)(),
+         (101...103)
+       )
+     ),
+     RescueModifierNode(107...129)(
+       CallNode(107...110)(
+         nil,
+         nil,
+         (107...110),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (111...117),
+       IfNode(118...129)(
+         nil,
+         NilNode(118...121)(),
+         StatementsNode(124...125)([IntegerNode(124...125)()]),
+         ElseNode(126...129)(
+           (126...127),
+           StatementsNode(128...129)([IntegerNode(128...129)()]),
+           nil
+         ),
+         nil
+       )
+     ),
+     BeginNode(131...155)(
+       (131...136),
+       StatementsNode(138...139)(
+         [CallNode(138...139)(
+            nil,
+            nil,
+            (138...139),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(141...150)(
+         (141...147),
+         [SplatNode(148...150)(
+            (148...149),
+            CallNode(149...150)(
+              nil,
+              nil,
+              (149...150),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )
+          )],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       nil,
+       nil,
+       (152...155)
+     ),
+     CallNode(157...212)(
+       nil,
+       nil,
+       (157...160),
+       nil,
+       nil,
+       nil,
+       BlockNode(161...212)(
+         [:x],
+         BlockParametersNode(164...167)(
+           ParametersNode(165...166)(
+             [RequiredParameterNode(165...166)(:x)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (164...165),
+           (166...167)
+         ),
+         StatementsNode(170...208)(
+           [RescueModifierNode(170...208)(
+              CallNode(170...176)(
+                nil,
+                nil,
+                (170...173),
+                (173...174),
+                ArgumentsNode(174...175)(
+                  [CallNode(174...175)(
+                     nil,
+                     nil,
+                     (174...175),
+                     nil,
+                     nil,
+                     nil,
+                     nil,
+                     0,
+                     "y"
+                   )]
+                ),
+                (175...176),
+                nil,
+                0,
+                "bar"
+              ),
+              (177...183),
+              CallNode(184...208)(
+                nil,
+                nil,
+                (184...197),
+                nil,
+                ArgumentsNode(198...208)(
+                  [CallNode(198...208)(
+                     nil,
+                     nil,
+                     (198...202),
+                     nil,
+                     ArgumentsNode(203...208)(
+                       [StringNode(203...208)(
+                          (203...204),
+                          (204...207),
+                          (207...208),
+                          "baz"
+                        )]
+                     ),
+                     nil,
+                     nil,
+                     0,
+                     "fail"
+                   )]
+                ),
+                nil,
+                nil,
+                0,
+                "ArgumentError"
+              )
+            )]
+         ),
+         (161...163),
+         (209...212)
+       ),
+       0,
+       "foo"
+     ),
+     IfNode(214...245)(
+       (214...216),
+       LocalVariableWriteNode(217...235)(
+         :a,
+         0,
+         RescueModifierNode(221...235)(
+           CallNode(221...224)(
+             nil,
+             nil,
+             (221...224),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "foo"
+           ),
+           (225...231),
+           NilNode(232...235)()
+         ),
+         (217...218),
+         (219...220)
+       ),
+       StatementsNode(238...241)(
+         [CallNode(238...241)(
+            nil,
+            nil,
+            (238...241),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       nil,
+       (242...245)
+     ),
+     DefNode(247...291)(
+       (251...262),
+       nil,
+       nil,
+       StatementsNode(265...291)(
+         [CallNode(265...291)(
+            nil,
+            nil,
+            (265...277),
+            nil,
+            ArgumentsNode(278...291)(
+              [RescueModifierNode(278...291)(
+                 IntegerNode(278...280)(),
+                 (281...287),
+                 NilNode(288...291)()
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "other_method"
+          )]
+       ),
+       [],
+       (247...250),
+       nil,
+       nil,
+       nil,
+       (263...264),
+       nil
+     ),
+     DefNode(293...316)(
+       (297...298),
+       nil,
+       nil,
+       BeginNode(301...316)(
+         nil,
+         StatementsNode(301...305)(
+           [CallNode(301...305)(
+              nil,
+              nil,
+              (301...302),
+              nil,
+              ArgumentsNode(303...305)(
+                [KeywordHashNode(303...305)(
+                   [AssocNode(303...305)(
+                      SymbolNode(303...305)(
+                        nil,
+                        (303...304),
+                        (304...305),
+                        "b"
+                      ),
+                      nil,
+                      nil
+                    )]
+                 )]
+              ),
+              nil,
+              nil,
+              0,
+              "a"
+            )]
+         ),
+         RescueNode(306...312)((306...312), [], nil, nil, nil, nil),
+         nil,
+         nil,
+         (313...316)
+       ),
+       [],
+       (293...296),
+       nil,
+       nil,
+       nil,
+       nil,
+       (313...316)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/return.txt b/test/yarp/snapshots/return.txt
new file mode 100644
index 0000000000..bbb4b63af2
--- /dev/null
+++ b/test/yarp/snapshots/return.txt
@@ -0,0 +1,92 @@
+ProgramNode(0...139)(
+  [],
+  StatementsNode(0...139)(
+    [ReturnNode(0...6)((0...6), nil),
+     ReturnNode(8...28)(
+       (8...14),
+       ArgumentsNode(15...28)(
+         [ParenthesesNode(15...18)(
+            StatementsNode(16...17)([IntegerNode(16...17)()]),
+            (15...16),
+            (17...18)
+          ),
+          ParenthesesNode(20...23)(
+            StatementsNode(21...22)([IntegerNode(21...22)()]),
+            (20...21),
+            (22...23)
+          ),
+          ParenthesesNode(25...28)(
+            StatementsNode(26...27)([IntegerNode(26...27)()]),
+            (25...26),
+            (27...28)
+          )]
+       )
+     ),
+     ReturnNode(30...39)(
+       (30...36),
+       ArgumentsNode(37...39)(
+         [SplatNode(37...39)((37...38), IntegerNode(38...39)())]
+       )
+     ),
+     ReturnNode(41...49)(
+       (41...47),
+       ArgumentsNode(48...49)([IntegerNode(48...49)()])
+     ),
+     ReturnNode(51...65)(
+       (51...57),
+       ArgumentsNode(58...65)(
+         [IntegerNode(58...59)(),
+          IntegerNode(61...62)(),
+          IntegerNode(64...65)()]
+       )
+     ),
+     ReturnNode(67...81)(
+       (67...73),
+       ArgumentsNode(74...81)(
+         [IntegerNode(74...75)(),
+          IntegerNode(77...78)(),
+          IntegerNode(80...81)()]
+       )
+     ),
+     ReturnNode(83...99)(
+       (83...89),
+       ArgumentsNode(90...99)(
+         [ArrayNode(90...99)(
+            [IntegerNode(91...92)(),
+             IntegerNode(94...95)(),
+             IntegerNode(97...98)()],
+            (90...91),
+            (98...99)
+          )]
+       )
+     ),
+     ReturnNode(101...118)(
+       (101...107),
+       ArgumentsNode(107...118)(
+         [ParenthesesNode(107...118)(
+            StatementsNode(111...116)(
+              [IntegerNode(111...112)(), IntegerNode(115...116)()]
+            ),
+            (107...108),
+            (117...118)
+          )]
+       )
+     ),
+     ReturnNode(120...128)(
+       (120...126),
+       ArgumentsNode(126...128)(
+         [ParenthesesNode(126...128)(nil, (126...127), (127...128))]
+       )
+     ),
+     ReturnNode(130...139)(
+       (130...136),
+       ArgumentsNode(136...139)(
+         [ParenthesesNode(136...139)(
+            StatementsNode(137...138)([IntegerNode(137...138)()]),
+            (136...137),
+            (138...139)
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/BEGIN.txt b/test/yarp/snapshots/seattlerb/BEGIN.txt
new file mode 100644
index 0000000000..f3366c5610
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/BEGIN.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [PreExecutionNode(0...12)(
+       StatementsNode(8...10)([IntegerNode(8...10)()]),
+       (0...5),
+       (6...7),
+       (11...12)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/__ENCODING__.txt b/test/yarp/snapshots/seattlerb/__ENCODING__.txt
new file mode 100644
index 0000000000..2f5aaa5dfc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/__ENCODING__.txt
@@ -0,0 +1 @@
+ProgramNode(0...12)([], StatementsNode(0...12)([SourceEncodingNode(0...12)()]))
diff --git a/test/yarp/snapshots/seattlerb/alias_gvar_backref.txt b/test/yarp/snapshots/seattlerb/alias_gvar_backref.txt
new file mode 100644
index 0000000000..c055a64925
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/alias_gvar_backref.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [AliasNode(0...15)(
+       GlobalVariableReadNode(6...12)(),
+       BackReferenceReadNode(13...15)(),
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/alias_resword.txt b/test/yarp/snapshots/seattlerb/alias_resword.txt
new file mode 100644
index 0000000000..8452f54826
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/alias_resword.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [AliasNode(0...12)(
+       SymbolNode(6...8)(nil, (6...8), nil, "in"),
+       SymbolNode(9...12)(nil, (9...12), nil, "out"),
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/and_multi.txt b/test/yarp/snapshots/seattlerb/and_multi.txt
new file mode 100644
index 0000000000..2db7d7cedd
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/and_multi.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [AndNode(0...27)(
+       AndNode(0...18)(
+         TrueNode(0...4)(),
+         CallNode(9...18)(
+           FalseNode(13...18)(),
+           nil,
+           (9...12),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "!"
+         ),
+         (5...8)
+       ),
+       TrueNode(23...27)(),
+       (19...22)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/aref_args_assocs.txt b/test/yarp/snapshots/seattlerb/aref_args_assocs.txt
new file mode 100644
index 0000000000..aac10a6763
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/aref_args_assocs.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [ArrayNode(0...8)(
+       [KeywordHashNode(1...7)(
+          [AssocNode(1...7)(
+             IntegerNode(1...2)(),
+             IntegerNode(6...7)(),
+             (3...5)
+           )]
+        )],
+       (0...1),
+       (7...8)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/aref_args_lit_assocs.txt b/test/yarp/snapshots/seattlerb/aref_args_lit_assocs.txt
new file mode 100644
index 0000000000..24857076d0
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/aref_args_lit_assocs.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...11)(
+       [IntegerNode(1...2)(),
+        KeywordHashNode(4...10)(
+          [AssocNode(4...10)(
+             IntegerNode(4...5)(),
+             IntegerNode(9...10)(),
+             (6...8)
+           )]
+        )],
+       (0...1),
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/args_kw_block.txt b/test/yarp/snapshots/seattlerb/args_kw_block.txt
new file mode 100644
index 0000000000..ee6e224c80
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/args_kw_block.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [DefNode(0...20)(
+       (4...5),
+       nil,
+       ParametersNode(6...14)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...10)((6...8), IntegerNode(9...10)())],
+         nil,
+         BlockParameterNode(12...14)((13...14), (12...13))
+       ),
+       nil,
+       [:a, :b],
+       (0...3),
+       nil,
+       (5...6),
+       (14...15),
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/array_line_breaks.txt b/test/yarp/snapshots/seattlerb/array_line_breaks.txt
new file mode 100644
index 0000000000..4d5224564b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/array_line_breaks.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [ArrayNode(0...11)(
+       [StringNode(2...5)((2...3), (3...4), (4...5), "a"),
+        StringNode(7...10)((7...8), (8...9), (9...10), "b")],
+       (0...1),
+       (10...11)
+     ),
+     IntegerNode(12...13)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/array_lits_trailing_calls.txt b/test/yarp/snapshots/seattlerb/array_lits_trailing_calls.txt
new file mode 100644
index 0000000000..8e9c131846
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/array_lits_trailing_calls.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...6)(
+       ArrayNode(0...4)([], (0...3), (3...4)),
+       (4...5),
+       (5...6),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "b"
+     ),
+     CallNode(8...12)(
+       ArrayNode(8...10)([], (8...9), (9...10)),
+       (10...11),
+       (11...12),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/assoc__bare.txt b/test/yarp/snapshots/seattlerb/assoc__bare.txt
new file mode 100644
index 0000000000..ddefbd1f62
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/assoc__bare.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [HashNode(0...6)(
+       (0...1),
+       [AssocNode(2...4)(
+          SymbolNode(2...4)(nil, (2...3), (3...4), "y"),
+          nil,
+          nil
+        )],
+       (5...6)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/assoc_label.txt b/test/yarp/snapshots/seattlerb/assoc_label.txt
new file mode 100644
index 0000000000..4fa881d191
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/assoc_label.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...5)(
+         [KeywordHashNode(2...5)(
+            [AssocNode(2...5)(
+               SymbolNode(2...4)(nil, (2...3), (3...4), "b"),
+               IntegerNode(4...5)(),
+               nil
+             )]
+          )]
+       ),
+       (5...6),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/attr_asgn_colon_id.txt b/test/yarp/snapshots/seattlerb/attr_asgn_colon_id.txt
new file mode 100644
index 0000000000..20cff2a086
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/attr_asgn_colon_id.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       ConstantReadNode(0...1)(),
+       (1...3),
+       (3...4),
+       nil,
+       ArgumentsNode(7...8)([IntegerNode(7...8)()]),
+       nil,
+       nil,
+       0,
+       "b="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/attrasgn_array_arg.txt b/test/yarp/snapshots/seattlerb/attrasgn_array_arg.txt
new file mode 100644
index 0000000000..4da302b141
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/attrasgn_array_arg.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (1...9),
+       (1...2),
+       ArgumentsNode(2...13)(
+         [ArrayNode(2...8)(
+            [IntegerNode(3...4)(), IntegerNode(6...7)()],
+            (2...3),
+            (7...8)
+          ),
+          IntegerNode(12...13)()]
+       ),
+       (8...9),
+       nil,
+       0,
+       "[]="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/attrasgn_array_lhs.txt b/test/yarp/snapshots/seattlerb/attrasgn_array_lhs.txt
new file mode 100644
index 0000000000..e720ae5c86
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/attrasgn_array_lhs.txt
@@ -0,0 +1,57 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [CallNode(0...42)(
+       ArrayNode(0...12)(
+         [IntegerNode(1...2)(),
+          IntegerNode(4...5)(),
+          IntegerNode(7...8)(),
+          IntegerNode(10...11)()],
+         (0...1),
+         (11...12)
+       ),
+       nil,
+       (12...24),
+       (12...13),
+       ArgumentsNode(13...42)(
+         [RangeNode(13...23)(
+            CallNode(13...17)(
+              nil,
+              nil,
+              (13...17),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "from"
+            ),
+            CallNode(21...23)(
+              nil,
+              nil,
+              (21...23),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "to"
+            ),
+            (18...20),
+            0
+          ),
+          ArrayNode(27...42)(
+            [StringNode(28...31)((28...29), (29...30), (30...31), "a"),
+             StringNode(33...36)((33...34), (34...35), (35...36), "b"),
+             StringNode(38...41)((38...39), (39...40), (40...41), "c")],
+            (27...28),
+            (41...42)
+          )]
+       ),
+       (23...24),
+       nil,
+       0,
+       "[]="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/attrasgn_primary_dot_constant.txt b/test/yarp/snapshots/seattlerb/attrasgn_primary_dot_constant.txt
new file mode 100644
index 0000000000..562fa404d4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/attrasgn_primary_dot_constant.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       nil,
+       ArgumentsNode(6...7)([IntegerNode(6...7)()]),
+       nil,
+       nil,
+       0,
+       "B="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/backticks_interpolation_line.txt b/test/yarp/snapshots/seattlerb/backticks_interpolation_line.txt
new file mode 100644
index 0000000000..27d3f4e3cf
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/backticks_interpolation_line.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...8)(
+         [InterpolatedXStringNode(2...8)(
+            (2...3),
+            [EmbeddedStatementsNode(3...7)(
+               (3...5),
+               StatementsNode(5...6)(
+                 [CallNode(5...6)(
+                    nil,
+                    nil,
+                    (5...6),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "y"
+                  )]
+               ),
+               (6...7)
+             )],
+            (7...8)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bang_eq.txt b/test/yarp/snapshots/seattlerb/bang_eq.txt
new file mode 100644
index 0000000000..3a04d4603a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bang_eq.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...4),
+       nil,
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       nil,
+       nil,
+       0,
+       "!="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bdot2.txt b/test/yarp/snapshots/seattlerb/bdot2.txt
new file mode 100644
index 0000000000..107f9ec206
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bdot2.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [RangeNode(0...4)(nil, IntegerNode(2...4)(), (0...2), 0),
+     RangeNode(7...10)(
+       nil,
+       CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "a"),
+       (7...9),
+       0
+     ),
+     CallNode(13...14)(nil, nil, (13...14), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bdot3.txt b/test/yarp/snapshots/seattlerb/bdot3.txt
new file mode 100644
index 0000000000..433ff9b38f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bdot3.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [RangeNode(0...5)(nil, IntegerNode(3...5)(), (0...3), 1),
+     RangeNode(8...12)(
+       nil,
+       CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "a"),
+       (8...11),
+       1
+     ),
+     CallNode(15...16)(nil, nil, (15...16), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/begin_ensure_no_bodies.txt b/test/yarp/snapshots/seattlerb/begin_ensure_no_bodies.txt
new file mode 100644
index 0000000000..39ac8bfea1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/begin_ensure_no_bodies.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [BeginNode(0...16)(
+       (0...5),
+       nil,
+       nil,
+       nil,
+       EnsureNode(6...16)((6...12), nil, (13...16)),
+       (13...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/begin_rescue_else_ensure_bodies.txt b/test/yarp/snapshots/seattlerb/begin_rescue_else_ensure_bodies.txt
new file mode 100644
index 0000000000..4ad22bbc28
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/begin_rescue_else_ensure_bodies.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...44)(
+  [],
+  StatementsNode(0...44)(
+    [BeginNode(0...44)(
+       (0...5),
+       StatementsNode(8...9)([IntegerNode(8...9)()]),
+       RescueNode(10...20)(
+         (10...16),
+         [],
+         nil,
+         nil,
+         StatementsNode(19...20)([IntegerNode(19...20)()]),
+         nil
+       ),
+       ElseNode(21...36)(
+         (21...25),
+         StatementsNode(28...29)([IntegerNode(28...29)()]),
+         (30...36)
+       ),
+       EnsureNode(30...44)(
+         (30...36),
+         StatementsNode(39...40)([IntegerNode(39...40)()]),
+         (41...44)
+       ),
+       (41...44)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/begin_rescue_else_ensure_no_bodies.txt b/test/yarp/snapshots/seattlerb/begin_rescue_else_ensure_no_bodies.txt
new file mode 100644
index 0000000000..f8cc5345e3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/begin_rescue_else_ensure_no_bodies.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...32)(
+  [],
+  StatementsNode(0...32)(
+    [BeginNode(0...32)(
+       (0...5),
+       nil,
+       RescueNode(7...13)((7...13), [], nil, nil, nil, nil),
+       ElseNode(15...27)((15...19), nil, (21...27)),
+       EnsureNode(21...32)((21...27), nil, (29...32)),
+       (29...32)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/begin_rescue_ensure_no_bodies.txt b/test/yarp/snapshots/seattlerb/begin_rescue_ensure_no_bodies.txt
new file mode 100644
index 0000000000..1152a0cddf
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/begin_rescue_ensure_no_bodies.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [BeginNode(0...23)(
+       (0...5),
+       nil,
+       RescueNode(6...12)((6...12), [], nil, nil, nil, nil),
+       nil,
+       EnsureNode(13...23)((13...19), nil, (20...23)),
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg__bare.txt b/test/yarp/snapshots/seattlerb/block_arg__bare.txt
new file mode 100644
index 0000000000..94451c870d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg__bare.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [DefNode(0...13)(
+       (4...5),
+       nil,
+       ParametersNode(6...7)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         BlockParameterNode(6...7)(nil, (6...7))
+       ),
+       nil,
+       [:&],
+       (0...3),
+       nil,
+       (5...6),
+       (7...8),
+       nil,
+       (10...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_kwsplat.txt b/test/yarp/snapshots/seattlerb/block_arg_kwsplat.txt
new file mode 100644
index 0000000000..36b7c9f83c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_kwsplat.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...11)(
+         [:b],
+         BlockParametersNode(4...9)(
+           ParametersNode(5...8)(
+             [],
+             [],
+             [],
+             nil,
+             [],
+             KeywordRestParameterNode(5...8)((5...7), (7...8)),
+             nil
+           ),
+           [],
+           (4...5),
+           (8...9)
+         ),
+         nil,
+         (2...3),
+         (10...11)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_opt_arg_block.txt b/test/yarp/snapshots/seattlerb/block_arg_opt_arg_block.txt
new file mode 100644
index 0000000000..9a663faff8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_opt_arg_block.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [CallNode(0...21)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...21)(
+         [:b, :c, :d, :e],
+         BlockParametersNode(4...19)(
+           ParametersNode(5...18)(
+             [RequiredParameterNode(5...6)(:b)],
+             [OptionalParameterNode(8...11)(
+                :c,
+                (8...9),
+                (9...10),
+                IntegerNode(10...11)()
+              )],
+             [RequiredParameterNode(13...14)(:d)],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(16...18)((17...18), (16...17))
+           ),
+           [],
+           (4...5),
+           (18...19)
+         ),
+         nil,
+         (2...3),
+         (20...21)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_opt_splat.txt b/test/yarp/snapshots/seattlerb/block_arg_opt_splat.txt
new file mode 100644
index 0000000000..096a00092d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_opt_splat.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [CallNode(0...20)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...20)(
+         [:b, :c, :d],
+         BlockParametersNode(4...18)(
+           ParametersNode(5...17)(
+             [RequiredParameterNode(5...6)(:b)],
+             [OptionalParameterNode(8...13)(
+                :c,
+                (8...9),
+                (10...11),
+                IntegerNode(12...13)()
+              )],
+             [],
+             RestParameterNode(15...17)((15...16), (16...17)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (17...18)
+         ),
+         nil,
+         (2...3),
+         (19...20)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_opt_splat_arg_block_omfg.txt b/test/yarp/snapshots/seattlerb/block_arg_opt_splat_arg_block_omfg.txt
new file mode 100644
index 0000000000..6ace3ff446
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_opt_splat_arg_block_omfg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CallNode(0...25)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...25)(
+         [:b, :c, :d, :e, :f],
+         BlockParametersNode(4...23)(
+           ParametersNode(5...22)(
+             [RequiredParameterNode(5...6)(:b)],
+             [OptionalParameterNode(8...11)(
+                :c,
+                (8...9),
+                (9...10),
+                IntegerNode(10...11)()
+              )],
+             [RequiredParameterNode(17...18)(:e)],
+             RestParameterNode(13...15)((13...14), (14...15)),
+             [],
+             nil,
+             BlockParameterNode(20...22)((21...22), (20...21))
+           ),
+           [],
+           (4...5),
+           (22...23)
+         ),
+         nil,
+         (2...3),
+         (24...25)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_optional.txt b/test/yarp/snapshots/seattlerb/block_arg_optional.txt
new file mode 100644
index 0000000000..cb71821778
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_optional.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...13)(
+         [:b],
+         BlockParametersNode(4...11)(
+           ParametersNode(5...10)(
+             [],
+             [OptionalParameterNode(5...10)(
+                :b,
+                (5...6),
+                (7...8),
+                IntegerNode(9...10)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (10...11)
+         ),
+         nil,
+         (2...3),
+         (12...13)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_scope.txt b/test/yarp/snapshots/seattlerb/block_arg_scope.txt
new file mode 100644
index 0000000000..498d41cbe3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_scope.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...12)(
+         [:b, :c],
+         BlockParametersNode(4...10)(
+           ParametersNode(5...6)(
+             [RequiredParameterNode(5...6)(:b)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [(8...9)],
+           (4...5),
+           (9...10)
+         ),
+         nil,
+         (2...3),
+         (11...12)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_scope2.txt b/test/yarp/snapshots/seattlerb/block_arg_scope2.txt
new file mode 100644
index 0000000000..787e8cb10a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_scope2.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:b, :c, :d],
+         BlockParametersNode(3...12)(
+           ParametersNode(4...5)(
+             [RequiredParameterNode(4...5)(:b)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [(7...8), (10...11)],
+           (3...4),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_arg_splat_arg.txt b/test/yarp/snapshots/seattlerb/block_arg_splat_arg.txt
new file mode 100644
index 0000000000..01732f748e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_arg_splat_arg.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...16)(
+         [:b, :c, :d],
+         BlockParametersNode(4...14)(
+           ParametersNode(5...13)(
+             [RequiredParameterNode(5...6)(:b)],
+             [],
+             [RequiredParameterNode(12...13)(:d)],
+             RestParameterNode(8...10)((8...9), (9...10)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (13...14)
+         ),
+         nil,
+         (2...3),
+         (15...16)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_args_kwargs.txt b/test/yarp/snapshots/seattlerb/block_args_kwargs.txt
new file mode 100644
index 0000000000..f54b1bc55f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_args_kwargs.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [CallNode(0...23)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...23)(
+         [:kwargs],
+         BlockParametersNode(4...14)(
+           ParametersNode(5...13)(
+             [],
+             [],
+             [],
+             nil,
+             [],
+             KeywordRestParameterNode(5...13)((5...7), (7...13)),
+             nil
+           ),
+           [],
+           (4...5),
+           (13...14)
+         ),
+         StatementsNode(15...21)([LocalVariableReadNode(15...21)(:kwargs, 0)]),
+         (2...3),
+         (22...23)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_args_no_kwargs.txt b/test/yarp/snapshots/seattlerb/block_args_no_kwargs.txt
new file mode 100644
index 0000000000..7e4fa1e9f8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_args_no_kwargs.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...13)(
+         [],
+         BlockParametersNode(4...11)(
+           ParametersNode(5...10)(
+             [],
+             [],
+             [],
+             nil,
+             [],
+             NoKeywordsParameterNode(5...10)((5...7), (7...10)),
+             nil
+           ),
+           [],
+           (4...5),
+           (10...11)
+         ),
+         nil,
+         (2...3),
+         (12...13)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_args_opt1.txt b/test/yarp/snapshots/seattlerb/block_args_opt1.txt
new file mode 100644
index 0000000000..271638e3d8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_args_opt1.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [CallNode(0...24)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...24)(
+         [:a, :b],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         StatementsNode(16...22)(
+           [ArrayNode(16...22)(
+              [LocalVariableReadNode(17...18)(:a, 0),
+               LocalVariableReadNode(20...21)(:b, 0)],
+              (16...17),
+              (21...22)
+            )]
+         ),
+         (2...3),
+         (23...24)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_args_opt2.txt b/test/yarp/snapshots/seattlerb/block_args_opt2.txt
new file mode 100644
index 0000000000..6b98d4f75c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_args_opt2.txt
@@ -0,0 +1,46 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:b, :c],
+         BlockParametersNode(4...16)(
+           ParametersNode(6...14)(
+             [],
+             [OptionalParameterNode(6...9)(
+                :b,
+                (6...7),
+                (7...8),
+                IntegerNode(8...9)()
+              ),
+              OptionalParameterNode(11...14)(
+                :c,
+                (11...12),
+                (12...13),
+                IntegerNode(13...14)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_args_opt2_2.txt b/test/yarp/snapshots/seattlerb/block_args_opt2_2.txt
new file mode 100644
index 0000000000..cdda0997df
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_args_opt2_2.txt
@@ -0,0 +1,54 @@
+ProgramNode(0...35)(
+  [],
+  StatementsNode(0...35)(
+    [CallNode(0...35)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...35)(
+         [:a, :b, :c],
+         BlockParametersNode(4...23)(
+           ParametersNode(5...22)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              ),
+              OptionalParameterNode(16...22)(
+                :c,
+                (16...17),
+                (18...19),
+                IntegerNode(20...22)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (22...23)
+         ),
+         StatementsNode(24...33)(
+           [ArrayNode(24...33)(
+              [LocalVariableReadNode(25...26)(:a, 0),
+               LocalVariableReadNode(28...29)(:b, 0),
+               LocalVariableReadNode(31...32)(:c, 0)],
+              (24...25),
+              (32...33)
+            )]
+         ),
+         (2...3),
+         (34...35)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_args_opt3.txt b/test/yarp/snapshots/seattlerb/block_args_opt3.txt
new file mode 100644
index 0000000000..0513157505
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_args_opt3.txt
@@ -0,0 +1,55 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [CallNode(0...42)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...42)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...27)(
+           ParametersNode(5...26)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              ),
+              OptionalParameterNode(16...22)(
+                :c,
+                (16...17),
+                (18...19),
+                IntegerNode(20...22)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(24...26)((25...26), (24...25))
+           ),
+           [],
+           (4...5),
+           (26...27)
+         ),
+         StatementsNode(28...40)(
+           [ArrayNode(28...40)(
+              [LocalVariableReadNode(29...30)(:a, 0),
+               LocalVariableReadNode(32...33)(:b, 0),
+               LocalVariableReadNode(35...36)(:c, 0),
+               LocalVariableReadNode(38...39)(:d, 0)],
+              (28...29),
+              (39...40)
+            )]
+         ),
+         (2...3),
+         (41...42)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_break.txt b/test/yarp/snapshots/seattlerb/block_break.txt
new file mode 100644
index 0000000000..3d93c86f69
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_break.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [BreakNode(0...26)(
+       ArgumentsNode(6...26)(
+         [CallNode(6...26)(
+            nil,
+            nil,
+            (6...9),
+            nil,
+            ArgumentsNode(10...13)(
+              [CallNode(10...13)(
+                 nil,
+                 nil,
+                 (10...13),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "arg"
+               )]
+            ),
+            nil,
+            BlockNode(14...26)(
+              [:bar],
+              BlockParametersNode(17...22)(
+                ParametersNode(18...21)(
+                  [RequiredParameterNode(18...21)(:bar)],
+                  [],
+                  [],
+                  nil,
+                  [],
+                  nil,
+                  nil
+                ),
+                [],
+                (17...18),
+                (21...22)
+              ),
+              nil,
+              (14...16),
+              (23...26)
+            ),
+            0,
+            "foo"
+          )]
+       ),
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_call_defn_call_block_call.txt b/test/yarp/snapshots/seattlerb/block_call_defn_call_block_call.txt
new file mode 100644
index 0000000000..5c68b72478
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_call_defn_call_block_call.txt
@@ -0,0 +1,61 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...18)(
+         [DefNode(2...18)(
+            (6...7),
+            nil,
+            ParametersNode(8...9)(
+              [RequiredParameterNode(8...9)(:c)],
+              [],
+              [],
+              nil,
+              [],
+              nil,
+              nil
+            ),
+            StatementsNode(12...13)(
+              [CallNode(12...13)(
+                 nil,
+                 nil,
+                 (12...13),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "d"
+               )]
+            ),
+            [:c],
+            (2...5),
+            nil,
+            (7...8),
+            (9...10),
+            nil,
+            (15...18)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(20...30)(
+       CallNode(20...21)(nil, nil, (20...21), nil, nil, nil, nil, 0, "e"),
+       (21...22),
+       (22...23),
+       nil,
+       nil,
+       nil,
+       BlockNode(24...30)([], nil, nil, (24...26), (27...30)),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_call_dot_op2_brace_block.txt b/test/yarp/snapshots/seattlerb/block_call_dot_op2_brace_block.txt
new file mode 100644
index 0000000000..5b3de7d352
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_call_dot_op2_brace_block.txt
@@ -0,0 +1,77 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CallNode(0...31)(
+       CallNode(0...16)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...2),
+         (2...3),
+         nil,
+         ArgumentsNode(4...7)(
+           [CallNode(4...7)(
+              nil,
+              nil,
+              (4...5),
+              (5...6),
+              nil,
+              (6...7),
+              nil,
+              0,
+              "c"
+            )]
+         ),
+         nil,
+         BlockNode(8...16)(
+           [],
+           nil,
+           StatementsNode(11...12)(
+             [CallNode(11...12)(
+                nil,
+                nil,
+                (11...12),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "d"
+              )]
+           ),
+           (8...10),
+           (13...16)
+         ),
+         0,
+         "b"
+       ),
+       (16...17),
+       (17...18),
+       nil,
+       nil,
+       nil,
+       BlockNode(19...31)(
+         [:f],
+         BlockParametersNode(22...25)(
+           ParametersNode(23...24)(
+             [RequiredParameterNode(23...24)(:f)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (22...23),
+           (24...25)
+         ),
+         StatementsNode(26...27)(
+           [CallNode(26...27)(nil, nil, (26...27), nil, nil, nil, nil, 0, "g")]
+         ),
+         (19...21),
+         (28...31)
+       ),
+       0,
+       "e"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_call_dot_op2_cmd_args_do_block.txt b/test/yarp/snapshots/seattlerb/block_call_dot_op2_cmd_args_do_block.txt
new file mode 100644
index 0000000000..28d30af0c6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_call_dot_op2_cmd_args_do_block.txt
@@ -0,0 +1,79 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [CallNode(0...33)(
+       CallNode(0...16)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...2),
+         (2...3),
+         nil,
+         ArgumentsNode(4...7)(
+           [CallNode(4...7)(
+              nil,
+              nil,
+              (4...5),
+              (5...6),
+              nil,
+              (6...7),
+              nil,
+              0,
+              "c"
+            )]
+         ),
+         nil,
+         BlockNode(8...16)(
+           [],
+           nil,
+           StatementsNode(11...12)(
+             [CallNode(11...12)(
+                nil,
+                nil,
+                (11...12),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "d"
+              )]
+           ),
+           (8...10),
+           (13...16)
+         ),
+         0,
+         "b"
+       ),
+       (16...17),
+       (17...18),
+       nil,
+       ArgumentsNode(19...20)(
+         [CallNode(19...20)(nil, nil, (19...20), nil, nil, nil, nil, 0, "f")]
+       ),
+       nil,
+       BlockNode(21...33)(
+         [:g],
+         BlockParametersNode(24...27)(
+           ParametersNode(25...26)(
+             [RequiredParameterNode(25...26)(:g)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (24...25),
+           (26...27)
+         ),
+         StatementsNode(28...29)(
+           [CallNode(28...29)(nil, nil, (28...29), nil, nil, nil, nil, 0, "h")]
+         ),
+         (21...23),
+         (30...33)
+       ),
+       0,
+       "e"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_call_operation_colon.txt b/test/yarp/snapshots/seattlerb/block_call_operation_colon.txt
new file mode 100644
index 0000000000..9f2be35702
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_call_operation_colon.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...15)(
+       CallNode(0...12)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...2),
+         (2...3),
+         nil,
+         ArgumentsNode(4...5)(
+           [CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "c")]
+         ),
+         nil,
+         BlockNode(6...12)([], nil, nil, (6...8), (9...12)),
+         0,
+         "b"
+       ),
+       (12...14),
+       (14...15),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "d"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_call_operation_dot.txt b/test/yarp/snapshots/seattlerb/block_call_operation_dot.txt
new file mode 100644
index 0000000000..255fdc2271
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_call_operation_dot.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       CallNode(0...12)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...2),
+         (2...3),
+         nil,
+         ArgumentsNode(4...5)(
+           [CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "c")]
+         ),
+         nil,
+         BlockNode(6...12)([], nil, nil, (6...8), (9...12)),
+         0,
+         "b"
+       ),
+       (12...13),
+       (13...14),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "d"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_call_paren_call_block_call.txt b/test/yarp/snapshots/seattlerb/block_call_paren_call_block_call.txt
new file mode 100644
index 0000000000..0689466b69
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_call_paren_call_block_call.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...5)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...5)(
+         [ParenthesesNode(2...5)(
+            StatementsNode(3...4)(
+              [CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "b")]
+            ),
+            (2...3),
+            (4...5)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(6...16)(
+       CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "c"),
+       (7...8),
+       (8...9),
+       nil,
+       nil,
+       nil,
+       BlockNode(10...16)([], nil, nil, (10...12), (13...16)),
+       0,
+       "d"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_command_operation_colon.txt b/test/yarp/snapshots/seattlerb/block_command_operation_colon.txt
new file mode 100644
index 0000000000..9007764dea
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_command_operation_colon.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       CallNode(0...11)(
+         nil,
+         nil,
+         (0...1),
+         nil,
+         ArgumentsNode(2...4)([SymbolNode(2...4)((2...3), (3...4), nil, "b")]),
+         nil,
+         BlockNode(5...11)([], nil, nil, (5...7), (8...11)),
+         0,
+         "a"
+       ),
+       (11...13),
+       (16...17),
+       nil,
+       ArgumentsNode(15...17)(
+         [SymbolNode(15...17)((15...16), (16...17), nil, "d")]
+       ),
+       nil,
+       nil,
+       0,
+       "d"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_command_operation_dot.txt b/test/yarp/snapshots/seattlerb/block_command_operation_dot.txt
new file mode 100644
index 0000000000..8225ce403f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_command_operation_dot.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       CallNode(0...11)(
+         nil,
+         nil,
+         (0...1),
+         nil,
+         ArgumentsNode(2...4)([SymbolNode(2...4)((2...3), (3...4), nil, "b")]),
+         nil,
+         BlockNode(5...11)([], nil, nil, (5...7), (8...11)),
+         0,
+         "a"
+       ),
+       (11...12),
+       (12...13),
+       nil,
+       ArgumentsNode(14...16)(
+         [SymbolNode(14...16)((14...15), (15...16), nil, "d")]
+       ),
+       nil,
+       nil,
+       0,
+       "c"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_decomp_anon_splat_arg.txt b/test/yarp/snapshots/seattlerb/block_decomp_anon_splat_arg.txt
new file mode 100644
index 0000000000..f5bee5b926
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_decomp_anon_splat_arg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:a],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [RequiredDestructuredParameterNode(5...11)(
+                [SplatNode(6...7)((6...7), nil),
+                 RequiredParameterNode(9...10)(:a)],
+                (5...6),
+                (10...11)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_decomp_arg_splat.txt b/test/yarp/snapshots/seattlerb/block_decomp_arg_splat.txt
new file mode 100644
index 0000000000..b1c8e2e9b8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_decomp_arg_splat.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:b],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [RequiredDestructuredParameterNode(5...11)(
+                [RequiredParameterNode(6...7)(:b),
+                 SplatNode(9...10)((9...10), nil)],
+                (5...6),
+                (10...11)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_decomp_arg_splat_arg.txt b/test/yarp/snapshots/seattlerb/block_decomp_arg_splat_arg.txt
new file mode 100644
index 0000000000..f66bef6ccb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_decomp_arg_splat_arg.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:a, :b, :c],
+         BlockParametersNode(4...16)(
+           ParametersNode(5...15)(
+             [RequiredDestructuredParameterNode(5...15)(
+                [RequiredParameterNode(6...7)(:a),
+                 SplatNode(9...11)(
+                   (9...10),
+                   RequiredParameterNode(10...11)(:b)
+                 ),
+                 RequiredParameterNode(13...14)(:c)],
+                (5...6),
+                (14...15)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_decomp_splat.txt b/test/yarp/snapshots/seattlerb/block_decomp_splat.txt
new file mode 100644
index 0000000000..c78fd82317
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_decomp_splat.txt
@@ -0,0 +1,39 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...12)(
+         [:a],
+         BlockParametersNode(4...10)(
+           ParametersNode(5...9)(
+             [RequiredDestructuredParameterNode(5...9)(
+                [SplatNode(6...8)((6...7), RequiredParameterNode(7...8)(:a))],
+                (5...6),
+                (8...9)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (9...10)
+         ),
+         nil,
+         (2...3),
+         (11...12)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_kw.txt b/test/yarp/snapshots/seattlerb/block_kw.txt
new file mode 100644
index 0000000000..b8f61d8e30
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_kw.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...15)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       nil,
+       nil,
+       BlockNode(5...15)(
+         [:k],
+         BlockParametersNode(7...13)(
+           ParametersNode(8...12)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(8...12)((8...10), IntegerNode(10...12)())],
+             nil,
+             nil
+           ),
+           [],
+           (7...8),
+           (12...13)
+         ),
+         nil,
+         (5...6),
+         (14...15)
+       ),
+       0,
+       "blah"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_kw__required.txt b/test/yarp/snapshots/seattlerb/block_kw__required.txt
new file mode 100644
index 0000000000..cb7b291237
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_kw__required.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       nil,
+       nil,
+       BlockNode(5...16)(
+         [:k],
+         BlockParametersNode(8...12)(
+           ParametersNode(9...11)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(9...11)((9...11), nil)],
+             nil,
+             nil
+           ),
+           [],
+           (8...9),
+           (11...12)
+         ),
+         nil,
+         (5...7),
+         (13...16)
+       ),
+       0,
+       "blah"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_kwarg_lvar.txt b/test/yarp/snapshots/seattlerb/block_kwarg_lvar.txt
new file mode 100644
index 0000000000..dd1df1b7ad
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_kwarg_lvar.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [CallNode(0...20)(
+       nil,
+       nil,
+       (0...2),
+       nil,
+       nil,
+       nil,
+       BlockNode(3...20)(
+         [:kw],
+         BlockParametersNode(5...15)(
+           ParametersNode(6...14)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(6...14)(
+                (6...9),
+                SymbolNode(10...14)((10...11), (11...14), nil, "val")
+              )],
+             nil,
+             nil
+           ),
+           [],
+           (5...6),
+           (14...15)
+         ),
+         StatementsNode(16...18)([LocalVariableReadNode(16...18)(:kw, 0)]),
+         (3...4),
+         (19...20)
+       ),
+       0,
+       "bl"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_kwarg_lvar_multiple.txt b/test/yarp/snapshots/seattlerb/block_kwarg_lvar_multiple.txt
new file mode 100644
index 0000000000..ae561f5de3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_kwarg_lvar_multiple.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [CallNode(0...33)(
+       nil,
+       nil,
+       (0...2),
+       nil,
+       nil,
+       nil,
+       BlockNode(3...33)(
+         [:kw, :kw2],
+         BlockParametersNode(5...28)(
+           ParametersNode(6...26)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(6...14)(
+                (6...9),
+                SymbolNode(10...14)((10...11), (11...14), nil, "val")
+              ),
+              KeywordParameterNode(16...26)(
+                (16...20),
+                SymbolNode(21...26)((21...22), (22...26), nil, "val2")
+              )],
+             nil,
+             nil
+           ),
+           [],
+           (5...6),
+           (27...28)
+         ),
+         StatementsNode(29...31)([LocalVariableReadNode(29...31)(:kw, 0)]),
+         (3...4),
+         (32...33)
+       ),
+       0,
+       "bl"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_next.txt b/test/yarp/snapshots/seattlerb/block_next.txt
new file mode 100644
index 0000000000..b7babbf781
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_next.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [NextNode(0...25)(
+       ArgumentsNode(5...25)(
+         [CallNode(5...25)(
+            nil,
+            nil,
+            (5...8),
+            nil,
+            ArgumentsNode(9...12)(
+              [CallNode(9...12)(
+                 nil,
+                 nil,
+                 (9...12),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "arg"
+               )]
+            ),
+            nil,
+            BlockNode(13...25)(
+              [:bar],
+              BlockParametersNode(16...21)(
+                ParametersNode(17...20)(
+                  [RequiredParameterNode(17...20)(:bar)],
+                  [],
+                  [],
+                  nil,
+                  [],
+                  nil,
+                  nil
+                ),
+                [],
+                (16...17),
+                (20...21)
+              ),
+              nil,
+              (13...15),
+              (22...25)
+            ),
+            0,
+            "foo"
+          )]
+       ),
+       (0...4)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_opt_arg.txt b/test/yarp/snapshots/seattlerb/block_opt_arg.txt
new file mode 100644
index 0000000000..0927953818
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_opt_arg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:b, :c],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [],
+             [OptionalParameterNode(5...8)(
+                :b,
+                (5...6),
+                (6...7),
+                IntegerNode(7...8)()
+              )],
+             [RequiredParameterNode(10...11)(:c)],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_opt_splat.txt b/test/yarp/snapshots/seattlerb/block_opt_splat.txt
new file mode 100644
index 0000000000..59b1a79e40
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_opt_splat.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:b, :c],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [],
+             [OptionalParameterNode(5...10)(
+                :b,
+                (5...6),
+                (7...8),
+                IntegerNode(9...10)()
+              )],
+             [],
+             RestParameterNode(12...14)((12...13), (13...14)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_opt_splat_arg_block_omfg.txt b/test/yarp/snapshots/seattlerb/block_opt_splat_arg_block_omfg.txt
new file mode 100644
index 0000000000..cc48f213f8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_opt_splat_arg_block_omfg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...22)(
+         [:b, :c, :d, :e],
+         BlockParametersNode(4...20)(
+           ParametersNode(5...19)(
+             [],
+             [OptionalParameterNode(5...8)(
+                :b,
+                (5...6),
+                (6...7),
+                IntegerNode(7...8)()
+              )],
+             [RequiredParameterNode(14...15)(:d)],
+             RestParameterNode(10...12)((10...11), (11...12)),
+             [],
+             nil,
+             BlockParameterNode(17...19)((18...19), (17...18))
+           ),
+           [],
+           (4...5),
+           (19...20)
+         ),
+         nil,
+         (2...3),
+         (21...22)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_optarg.txt b/test/yarp/snapshots/seattlerb/block_optarg.txt
new file mode 100644
index 0000000000..faaaf22e0e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_optarg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:b],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :b,
+                (5...6),
+                (7...8),
+                SymbolNode(9...11)((9...10), (10...11), nil, "c")
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_paren_splat.txt b/test/yarp/snapshots/seattlerb/block_paren_splat.txt
new file mode 100644
index 0000000000..74a59ed1de
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_paren_splat.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...15)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...15)(
+         [:b, :c],
+         BlockParametersNode(4...13)(
+           ParametersNode(5...12)(
+             [RequiredDestructuredParameterNode(5...12)(
+                [RequiredParameterNode(6...7)(:b),
+                 SplatNode(9...11)(
+                   (9...10),
+                   RequiredParameterNode(10...11)(:c)
+                 )],
+                (5...6),
+                (11...12)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (12...13)
+         ),
+         nil,
+         (2...3),
+         (14...15)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_reg_optarg.txt b/test/yarp/snapshots/seattlerb/block_reg_optarg.txt
new file mode 100644
index 0000000000..c6cbc623e0
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_reg_optarg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:b, :c],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [RequiredParameterNode(5...6)(:b)],
+             [OptionalParameterNode(8...14)(
+                :c,
+                (8...9),
+                (10...11),
+                SymbolNode(12...14)((12...13), (13...14), nil, "d")
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_return.txt b/test/yarp/snapshots/seattlerb/block_return.txt
new file mode 100644
index 0000000000..b8adacc523
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_return.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [ReturnNode(0...27)(
+       (0...6),
+       ArgumentsNode(7...27)(
+         [CallNode(7...27)(
+            nil,
+            nil,
+            (7...10),
+            nil,
+            ArgumentsNode(11...14)(
+              [CallNode(11...14)(
+                 nil,
+                 nil,
+                 (11...14),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "arg"
+               )]
+            ),
+            nil,
+            BlockNode(15...27)(
+              [:bar],
+              BlockParametersNode(18...23)(
+                ParametersNode(19...22)(
+                  [RequiredParameterNode(19...22)(:bar)],
+                  [],
+                  [],
+                  nil,
+                  [],
+                  nil,
+                  nil
+                ),
+                [],
+                (18...19),
+                (22...23)
+              ),
+              nil,
+              (15...17),
+              (24...27)
+            ),
+            0,
+            "foo"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_scope.txt b/test/yarp/snapshots/seattlerb/block_scope.txt
new file mode 100644
index 0000000000..223268c471
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_scope.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...10)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...10)(
+         [:b],
+         BlockParametersNode(4...8)(nil, [(6...7)], (4...5), (7...8)),
+         nil,
+         (2...3),
+         (9...10)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/block_splat_reg.txt b/test/yarp/snapshots/seattlerb/block_splat_reg.txt
new file mode 100644
index 0000000000..85011bd781
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/block_splat_reg.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...13)(
+         [:b, :c],
+         BlockParametersNode(4...11)(
+           ParametersNode(5...10)(
+             [],
+             [],
+             [RequiredParameterNode(9...10)(:c)],
+             RestParameterNode(5...7)((5...6), (6...7)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (10...11)
+         ),
+         nil,
+         (2...3),
+         (12...13)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug169.txt b/test/yarp/snapshots/seattlerb/bug169.txt
new file mode 100644
index 0000000000..d6b75f5369
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug169.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...4)([ParenthesesNode(2...4)(nil, (2...3), (3...4))]),
+       nil,
+       BlockNode(5...7)([], nil, nil, (5...6), (6...7)),
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug179.txt b/test/yarp/snapshots/seattlerb/bug179.txt
new file mode 100644
index 0000000000..9dc2331c93
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug179.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...9)(
+         [RangeNode(2...9)(
+            ParenthesesNode(2...4)(nil, (2...3), (3...4)),
+            NilNode(6...9)(),
+            (4...6),
+            0
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug190.txt b/test/yarp/snapshots/seattlerb/bug190.txt
new file mode 100644
index 0000000000..1ad483ada9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug190.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [RegularExpressionNode(0...6)((0...3), (3...5), (5...6), "'", 0)]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug191.txt b/test/yarp/snapshots/seattlerb/bug191.txt
new file mode 100644
index 0000000000..0e45d22dae
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug191.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [IfNode(0...9)(
+       nil,
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       StatementsNode(4...6)(
+         [StringNode(4...6)((4...5), (5...5), (5...6), "")]
+       ),
+       ElseNode(6...9)(
+         (6...7),
+         StatementsNode(8...9)(
+           [CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil
+       ),
+       nil
+     ),
+     IfNode(11...20)(
+       nil,
+       CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "a"),
+       StatementsNode(15...17)(
+         [StringNode(15...17)((15...16), (16...16), (16...17), "")]
+       ),
+       ElseNode(17...20)(
+         (17...18),
+         StatementsNode(19...20)(
+           [CallNode(19...20)(nil, nil, (19...20), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug202.txt b/test/yarp/snapshots/seattlerb/bug202.txt
new file mode 100644
index 0000000000..7bb548f798
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug202.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...22)(
+  [:测试],
+  StatementsNode(0...22)(
+    [GlobalVariableWriteNode(0...11)((0...7), (8...9), IntegerNode(10...11)()),
+     LocalVariableWriteNode(12...22)(
+       :测试,
+       0,
+       IntegerNode(21...22)(),
+       (12...18),
+       (19...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug236.txt b/test/yarp/snapshots/seattlerb/bug236.txt
new file mode 100644
index 0000000000..bf6b429802
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug236.txt
@@ -0,0 +1,65 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(1...7)(
+         [:a],
+         BlockParametersNode(2...6)(
+           ParametersNode(3...5)(
+             [RequiredParameterNode(3...4)(:a)],
+             [],
+             [],
+             RestParameterNode(4...5)((4...5), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (2...3),
+           (5...6)
+         ),
+         nil,
+         (1...2),
+         (6...7)
+       ),
+       0,
+       "x"
+     ),
+     CallNode(9...15)(
+       nil,
+       nil,
+       (9...10),
+       nil,
+       nil,
+       nil,
+       BlockNode(10...15)(
+         [:a],
+         BlockParametersNode(11...14)(
+           ParametersNode(12...13)(
+             [RequiredParameterNode(12...13)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (11...12),
+           (13...14)
+         ),
+         nil,
+         (10...11),
+         (14...15)
+       ),
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug290.txt b/test/yarp/snapshots/seattlerb/bug290.txt
new file mode 100644
index 0000000000..84e7cbeb97
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug290.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [BeginNode(0...15)(
+       (0...5),
+       StatementsNode(8...11)(
+         [CallNode(8...11)(nil, nil, (8...11), nil, nil, nil, nil, 0, "foo")]
+       ),
+       nil,
+       nil,
+       nil,
+       (12...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_187.txt b/test/yarp/snapshots/seattlerb/bug_187.txt
new file mode 100644
index 0000000000..b0c76b3c4b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_187.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallNode(0...28)(
+       nil,
+       nil,
+       (0...7),
+       nil,
+       ArgumentsNode(8...28)(
+         [DefNode(8...28)(
+            (12...13),
+            nil,
+            nil,
+            StatementsNode(14...24)(
+              [CallNode(14...24)(
+                 CallNode(14...15)(
+                   nil,
+                   nil,
+                   (14...15),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "a"
+                 ),
+                 (15...16),
+                 (16...17),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(18...24)([], nil, nil, (18...20), (21...24)),
+                 0,
+                 "b"
+               )]
+            ),
+            [],
+            (8...11),
+            nil,
+            nil,
+            nil,
+            nil,
+            (25...28)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "private"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_215.txt b/test/yarp/snapshots/seattlerb/bug_215.txt
new file mode 100644
index 0000000000..16a2ca3be1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_215.txt
@@ -0,0 +1,9 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [UndefNode(0...13)(
+       [SymbolNode(6...13)((6...9), (9...12), (12...13), "foo")],
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_249.txt b/test/yarp/snapshots/seattlerb/bug_249.txt
new file mode 100644
index 0000000000..08a99c73b9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_249.txt
@@ -0,0 +1,76 @@
+ProgramNode(0...67)(
+  [],
+  StatementsNode(0...67)(
+    [CallNode(0...67)(
+       nil,
+       nil,
+       (0...5),
+       nil,
+       ArgumentsNode(6...67)(
+         [CallNode(6...48)(
+            ParenthesesNode(6...44)(
+              StatementsNode(7...43)(
+                [CallNode(7...43)(
+                   ConstantReadNode(7...12)(),
+                   (12...13),
+                   (13...16),
+                   nil,
+                   nil,
+                   nil,
+                   BlockNode(17...43)(
+                     [],
+                     nil,
+                     StatementsNode(20...38)(
+                       [DefNode(20...38)(
+                          (24...34),
+                          nil,
+                          nil,
+                          nil,
+                          [],
+                          (20...23),
+                          nil,
+                          nil,
+                          nil,
+                          nil,
+                          (35...38)
+                        )]
+                     ),
+                     (17...19),
+                     (40...43)
+                   ),
+                   0,
+                   "new"
+                 )]
+              ),
+              (6...7),
+              (43...44)
+            ),
+            (44...45),
+            (45...48),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "new"
+          ),
+          KeywordHashNode(50...67)(
+            [AssocNode(50...67)(
+               SymbolNode(50...53)((50...51), (51...53), nil, "at"),
+               StringNode(57...67)(
+                 (57...58),
+                 (58...66),
+                 (66...67),
+                 "endpoint"
+               ),
+               (54...56)
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "mount"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_and.txt b/test/yarp/snapshots/seattlerb/bug_and.txt
new file mode 100644
index 0000000000..b81ddb4d87
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_and.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [AndNode(0...13)(TrueNode(0...4)(), TrueNode(9...13)(), (5...8)),
+     AndNode(15...26)(
+       TrueNode(15...19)(),
+       ArrayNode(24...26)([], (24...25), (25...26)),
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_args__19.txt b/test/yarp/snapshots/seattlerb/bug_args__19.txt
new file mode 100644
index 0000000000..64dece1b91
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_args__19.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...16)(
+         [:a, :b],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [RequiredDestructuredParameterNode(5...11)(
+                [RequiredParameterNode(6...7)(:a),
+                 RequiredParameterNode(9...10)(:b)],
+                (5...6),
+                (10...11)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         StatementsNode(13...14)(
+           [CallNode(13...14)(nil, nil, (13...14), nil, nil, nil, nil, 0, "d")]
+         ),
+         (2...3),
+         (15...16)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_args_masgn.txt b/test/yarp/snapshots/seattlerb/bug_args_masgn.txt
new file mode 100644
index 0000000000..5a79af6c92
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_args_masgn.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:a, :b, :c],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [RequiredDestructuredParameterNode(5...11)(
+                [RequiredParameterNode(6...7)(:a),
+                 RequiredParameterNode(9...10)(:b)],
+                (5...6),
+                (10...11)
+              ),
+              RequiredParameterNode(13...14)(:c)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_args_masgn2.txt b/test/yarp/snapshots/seattlerb/bug_args_masgn2.txt
new file mode 100644
index 0000000000..410d5f7ebd
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_args_masgn2.txt
@@ -0,0 +1,46 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...22)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...20)(
+           ParametersNode(5...19)(
+             [RequiredDestructuredParameterNode(5...16)(
+                [RequiredDestructuredParameterNode(6...12)(
+                   [RequiredParameterNode(7...8)(:a),
+                    RequiredParameterNode(10...11)(:b)],
+                   (6...7),
+                   (11...12)
+                 ),
+                 RequiredParameterNode(14...15)(:c)],
+                (5...6),
+                (15...16)
+              ),
+              RequiredParameterNode(18...19)(:d)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (19...20)
+         ),
+         nil,
+         (2...3),
+         (21...22)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_args_masgn_outer_parens__19.txt b/test/yarp/snapshots/seattlerb/bug_args_masgn_outer_parens__19.txt
new file mode 100644
index 0000000000..c0b97dce6b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_args_masgn_outer_parens__19.txt
@@ -0,0 +1,45 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [CallNode(0...19)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...19)(
+         [:k, :v, :i],
+         BlockParametersNode(4...17)(
+           ParametersNode(5...16)(
+             [RequiredDestructuredParameterNode(5...16)(
+                [RequiredDestructuredParameterNode(6...12)(
+                   [RequiredParameterNode(7...8)(:k),
+                    RequiredParameterNode(10...11)(:v)],
+                   (6...7),
+                   (11...12)
+                 ),
+                 RequiredParameterNode(14...15)(:i)],
+                (5...6),
+                (15...16)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (16...17)
+         ),
+         nil,
+         (2...3),
+         (18...19)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_call_arglist_parens.txt b/test/yarp/snapshots/seattlerb/bug_call_arglist_parens.txt
new file mode 100644
index 0000000000..61193bb0a6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_call_arglist_parens.txt
@@ -0,0 +1,87 @@
+ProgramNode(6...94)(
+  [],
+  StatementsNode(6...94)(
+    [DefNode(6...39)(
+       (10...11),
+       nil,
+       nil,
+       StatementsNode(20...29)(
+         [CallNode(20...29)(
+            nil,
+            nil,
+            (20...21),
+            nil,
+            ArgumentsNode(22...29)(
+              [ParenthesesNode(22...26)(
+                 StatementsNode(24...25)([IntegerNode(24...25)()]),
+                 (22...23),
+                 (25...26)
+               ),
+               IntegerNode(28...29)()]
+            ),
+            nil,
+            nil,
+            0,
+            "g"
+          )]
+       ),
+       [],
+       (6...9),
+       nil,
+       nil,
+       nil,
+       nil,
+       (36...39)
+     ),
+     DefNode(48...82)(
+       (52...53),
+       nil,
+       nil,
+       StatementsNode(64...72)(
+         [CallNode(64...72)(
+            nil,
+            nil,
+            (64...65),
+            nil,
+            ArgumentsNode(66...72)(
+              [ParenthesesNode(66...69)(
+                 StatementsNode(67...68)([IntegerNode(67...68)()]),
+                 (66...67),
+                 (68...69)
+               ),
+               IntegerNode(71...72)()]
+            ),
+            nil,
+            nil,
+            0,
+            "g"
+          )]
+       ),
+       [],
+       (48...51),
+       nil,
+       (53...54),
+       (54...55),
+       nil,
+       (79...82)
+     ),
+     CallNode(85...94)(
+       nil,
+       nil,
+       (85...86),
+       nil,
+       ArgumentsNode(87...94)(
+         [ParenthesesNode(87...91)(
+            StatementsNode(89...90)([IntegerNode(89...90)()]),
+            (87...88),
+            (90...91)
+          ),
+          IntegerNode(93...94)()]
+       ),
+       nil,
+       nil,
+       0,
+       "g"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_case_when_regexp.txt b/test/yarp/snapshots/seattlerb/bug_case_when_regexp.txt
new file mode 100644
index 0000000000..0b898fd523
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_case_when_regexp.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CaseNode(0...26)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "x"),
+       [WhenNode(9...17)(
+          (9...13),
+          [RegularExpressionNode(14...17)(
+             (14...15),
+             (15...16),
+             (16...17),
+             "x",
+             0
+           )],
+          nil
+        )],
+       nil,
+       (0...4),
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_comma.txt b/test/yarp/snapshots/seattlerb/bug_comma.txt
new file mode 100644
index 0000000000..b4dbc7db5a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_comma.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [IfNode(0...24)(
+       (0...2),
+       CallNode(3...15)(
+         nil,
+         nil,
+         (3...7),
+         nil,
+         ArgumentsNode(8...15)(
+           [StringNode(8...10)((8...9), (9...10), nil, "d"),
+            CallNode(12...15)(
+              nil,
+              nil,
+              (12...15),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "dir"
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "test"
+       ),
+       nil,
+       nil,
+       (21...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_cond_pct.txt b/test/yarp/snapshots/seattlerb/bug_cond_pct.txt
new file mode 100644
index 0000000000..6a73ca7493
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_cond_pct.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CaseNode(0...28)(
+       nil,
+       [WhenNode(6...23)(
+          (6...10),
+          [RegularExpressionNode(11...23)(
+             (11...14),
+             (14...22),
+             (22...23),
+             "blahblah",
+             0
+           )],
+          nil
+        )],
+       nil,
+       (0...4),
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_hash_args.txt b/test/yarp/snapshots/seattlerb/bug_hash_args.txt
new file mode 100644
index 0000000000..1eec48e930
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_hash_args.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [CallNode(0...19)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...18)(
+         [SymbolNode(4...8)((4...5), (5...8), nil, "bar"),
+          KeywordHashNode(10...18)(
+            [AssocNode(10...18)(
+               SymbolNode(10...14)(nil, (10...13), (13...14), "baz"),
+               NilNode(15...18)(),
+               nil
+             )]
+          )]
+       ),
+       (18...19),
+       nil,
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_hash_args_trailing_comma.txt b/test/yarp/snapshots/seattlerb/bug_hash_args_trailing_comma.txt
new file mode 100644
index 0000000000..3801df91bf
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_hash_args_trailing_comma.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [CallNode(0...20)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...18)(
+         [SymbolNode(4...8)((4...5), (5...8), nil, "bar"),
+          KeywordHashNode(10...18)(
+            [AssocNode(10...18)(
+               SymbolNode(10...14)(nil, (10...13), (13...14), "baz"),
+               NilNode(15...18)(),
+               nil
+             )]
+          )]
+       ),
+       (19...20),
+       nil,
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_hash_interp_array.txt b/test/yarp/snapshots/seattlerb/bug_hash_interp_array.txt
new file mode 100644
index 0000000000..fff5c3bfb6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_hash_interp_array.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [HashNode(0...13)(
+       (0...1),
+       [AssocNode(2...11)(
+          InterpolatedSymbolNode(2...8)(
+            (2...3),
+            [EmbeddedStatementsNode(3...6)((3...5), nil, (5...6))],
+            (6...8)
+          ),
+          ArrayNode(9...11)([], (9...10), (10...11)),
+          nil
+        )],
+       (12...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_masgn_right.txt b/test/yarp/snapshots/seattlerb/bug_masgn_right.txt
new file mode 100644
index 0000000000..beee1f7990
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_masgn_right.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:a, :b, :c],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...14)(
+                [RequiredParameterNode(9...10)(:b),
+                 RequiredParameterNode(12...13)(:c)],
+                (8...9),
+                (13...14)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_not_parens.txt b/test/yarp/snapshots/seattlerb/bug_not_parens.txt
new file mode 100644
index 0000000000..3a12af1da8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_not_parens.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (0...3),
+       (3...4),
+       nil,
+       (5...6),
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/bug_op_asgn_rescue.txt b/test/yarp/snapshots/seattlerb/bug_op_asgn_rescue.txt
new file mode 100644
index 0000000000..2a445ebfdb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/bug_op_asgn_rescue.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...18)(
+  [:a],
+  StatementsNode(0...18)(
+    [LocalVariableOperatorOrWriteNode(0...18)(
+       (0...1),
+       (2...5),
+       RescueModifierNode(6...18)(
+         CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b"),
+         (8...14),
+         NilNode(15...18)()
+       ),
+       :a
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_and.txt b/test/yarp/snapshots/seattlerb/call_and.txt
new file mode 100644
index 0000000000..d6b4d8d6ce
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_and.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       "&"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_arg_assoc.txt b/test/yarp/snapshots/seattlerb/call_arg_assoc.txt
new file mode 100644
index 0000000000..e6c88afdf0
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_arg_assoc.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...10)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...9)(
+         [IntegerNode(2...3)(),
+          KeywordHashNode(5...9)(
+            [AssocNode(5...9)(
+               IntegerNode(5...6)(),
+               IntegerNode(8...9)(),
+               (6...8)
+             )]
+          )]
+       ),
+       (9...10),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_arg_assoc_kwsplat.txt b/test/yarp/snapshots/seattlerb/call_arg_assoc_kwsplat.txt
new file mode 100644
index 0000000000..076fe7a8b2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_arg_assoc_kwsplat.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...15)(
+         [IntegerNode(2...3)(),
+          KeywordHashNode(5...15)(
+            [AssocNode(5...10)(
+               SymbolNode(5...8)(nil, (5...7), (7...8), "kw"),
+               IntegerNode(9...10)(),
+               nil
+             ),
+             AssocSplatNode(12...15)(IntegerNode(14...15)(), (12...14))]
+          )]
+       ),
+       (15...16),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_arg_kwsplat.txt b/test/yarp/snapshots/seattlerb/call_arg_kwsplat.txt
new file mode 100644
index 0000000000..9571678cf7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_arg_kwsplat.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...8)(
+         [CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "b"),
+          KeywordHashNode(5...8)(
+            [AssocSplatNode(5...8)(IntegerNode(7...8)(), (5...7))]
+          )]
+       ),
+       (8...9),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_args_assoc_quoted.txt b/test/yarp/snapshots/seattlerb/call_args_assoc_quoted.txt
new file mode 100644
index 0000000000..792b07c41d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_args_assoc_quoted.txt
@@ -0,0 +1,82 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...11)(
+         [KeywordHashNode(2...11)(
+            [AssocNode(2...11)(
+               InterpolatedSymbolNode(2...9)(
+                 (2...3),
+                 [EmbeddedStatementsNode(3...7)(
+                    (3...5),
+                    StatementsNode(5...6)(
+                      [CallNode(5...6)(
+                         nil,
+                         nil,
+                         (5...6),
+                         nil,
+                         nil,
+                         nil,
+                         nil,
+                         0,
+                         "k"
+                       )]
+                    ),
+                    (6...7)
+                  )],
+                 (7...9)
+               ),
+               IntegerNode(9...11)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     ),
+     CallNode(13...21)(
+       nil,
+       nil,
+       (13...14),
+       nil,
+       ArgumentsNode(15...21)(
+         [KeywordHashNode(15...21)(
+            [AssocNode(15...21)(
+               SymbolNode(15...19)((15...16), (16...17), (17...19), "k"),
+               IntegerNode(19...21)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     ),
+     CallNode(23...31)(
+       nil,
+       nil,
+       (23...24),
+       nil,
+       ArgumentsNode(25...31)(
+         [KeywordHashNode(25...31)(
+            [AssocNode(25...31)(
+               SymbolNode(25...29)((25...26), (26...27), (27...29), "k"),
+               IntegerNode(29...31)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_args_assoc_trailing_comma.txt b/test/yarp/snapshots/seattlerb/call_args_assoc_trailing_comma.txt
new file mode 100644
index 0000000000..432a7c0a44
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_args_assoc_trailing_comma.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...9)(
+         [IntegerNode(2...3)(),
+          KeywordHashNode(5...9)(
+            [AssocNode(5...9)(
+               IntegerNode(5...6)(),
+               IntegerNode(8...9)(),
+               (6...8)
+             )]
+          )]
+       ),
+       (10...11),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_args_command.txt b/test/yarp/snapshots/seattlerb/call_args_command.txt
new file mode 100644
index 0000000000..649e360f18
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_args_command.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       nil,
+       ArgumentsNode(4...9)(
+         [CallNode(4...9)(
+            CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "c"),
+            (5...6),
+            (6...7),
+            nil,
+            ArgumentsNode(8...9)([IntegerNode(8...9)()]),
+            nil,
+            nil,
+            0,
+            "d"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_array_arg.txt b/test/yarp/snapshots/seattlerb/call_array_arg.txt
new file mode 100644
index 0000000000..ade225a9e6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_array_arg.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...4),
+       nil,
+       ArgumentsNode(5...13)(
+         [ArrayNode(5...13)(
+            [SymbolNode(6...8)((6...7), (7...8), nil, "b"),
+             SymbolNode(10...12)((10...11), (11...12), nil, "c")],
+            (5...6),
+            (12...13)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "=="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_array_block_call.txt b/test/yarp/snapshots/seattlerb/call_array_block_call.txt
new file mode 100644
index 0000000000..460621a131
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_array_block_call.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [CallNode(0...19)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...19)(
+         [ArrayNode(2...19)(
+            [NilNode(4...7)(),
+             CallNode(9...17)(
+               nil,
+               nil,
+               (9...10),
+               nil,
+               nil,
+               nil,
+               BlockNode(11...17)([], nil, nil, (11...13), (14...17)),
+               0,
+               "b"
+             )],
+            (2...3),
+            (18...19)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_array_lambda_block_call.txt b/test/yarp/snapshots/seattlerb/call_array_lambda_block_call.txt
new file mode 100644
index 0000000000..1d8c2f1472
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_array_lambda_block_call.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...11)(
+         [ArrayNode(2...11)(
+            [LambdaNode(3...10)(
+               [],
+               (3...5),
+               BlockParametersNode(5...7)(nil, [], (5...6), (6...7)),
+               nil
+             )],
+            (2...3),
+            (10...11)
+          )]
+       ),
+       nil,
+       BlockNode(12...18)([], nil, nil, (12...14), (15...18)),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_array_lit_inline_hash.txt b/test/yarp/snapshots/seattlerb/call_array_lit_inline_hash.txt
new file mode 100644
index 0000000000..ef336c5a15
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_array_lit_inline_hash.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...15)(
+         [ArrayNode(2...15)(
+            [SymbolNode(3...5)((3...4), (4...5), nil, "b"),
+             KeywordHashNode(7...14)(
+               [AssocNode(7...14)(
+                  SymbolNode(7...9)((7...8), (8...9), nil, "c"),
+                  IntegerNode(13...14)(),
+                  (10...12)
+                )]
+             )],
+            (2...3),
+            (14...15)
+          )]
+       ),
+       (15...16),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_assoc.txt b/test/yarp/snapshots/seattlerb/call_assoc.txt
new file mode 100644
index 0000000000..bd6a6e286c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_assoc.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...6)(
+         [KeywordHashNode(2...6)(
+            [AssocNode(2...6)(
+               IntegerNode(2...3)(),
+               IntegerNode(5...6)(),
+               (3...5)
+             )]
+          )]
+       ),
+       (6...7),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_assoc_new.txt b/test/yarp/snapshots/seattlerb/call_assoc_new.txt
new file mode 100644
index 0000000000..525b3b1472
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_assoc_new.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...5)(
+         [KeywordHashNode(2...5)(
+            [AssocNode(2...5)(
+               SymbolNode(2...4)(nil, (2...3), (3...4), "a"),
+               IntegerNode(4...5)(),
+               nil
+             )]
+          )]
+       ),
+       (5...6),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_assoc_new_if_multiline.txt b/test/yarp/snapshots/seattlerb/call_assoc_new_if_multiline.txt
new file mode 100644
index 0000000000..5bfb5a0887
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_assoc_new_if_multiline.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [CallNode(0...24)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...23)(
+         [KeywordHashNode(2...23)(
+            [AssocNode(2...23)(
+               SymbolNode(2...4)(nil, (2...3), (3...4), "b"),
+               IfNode(5...23)(
+                 (5...7),
+                 SymbolNode(8...10)((8...9), (9...10), nil, "c"),
+                 StatementsNode(11...12)([IntegerNode(11...12)()]),
+                 ElseNode(13...23)(
+                   (13...17),
+                   StatementsNode(18...19)([IntegerNode(18...19)()]),
+                   (20...23)
+                 ),
+                 (20...23)
+               ),
+               nil
+             )]
+          )]
+       ),
+       (23...24),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_assoc_trailing_comma.txt b/test/yarp/snapshots/seattlerb/call_assoc_trailing_comma.txt
new file mode 100644
index 0000000000..0f68852c19
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_assoc_trailing_comma.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...6)(
+         [KeywordHashNode(2...6)(
+            [AssocNode(2...6)(
+               IntegerNode(2...3)(),
+               IntegerNode(5...6)(),
+               (3...5)
+             )]
+          )]
+       ),
+       (7...8),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_bang_command_call.txt b/test/yarp/snapshots/seattlerb/call_bang_command_call.txt
new file mode 100644
index 0000000000..37cf8e13af
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_bang_command_call.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(2...7)(
+         CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "a"),
+         (3...4),
+         (4...5),
+         nil,
+         ArgumentsNode(6...7)([IntegerNode(6...7)()]),
+         nil,
+         nil,
+         0,
+         "b"
+       ),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_bang_squiggle.txt b/test/yarp/snapshots/seattlerb/call_bang_squiggle.txt
new file mode 100644
index 0000000000..5614695771
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_bang_squiggle.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...4),
+       nil,
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       nil,
+       nil,
+       0,
+       "!~"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_begin_call_block_call.txt b/test/yarp/snapshots/seattlerb/call_begin_call_block_call.txt
new file mode 100644
index 0000000000..7d0e92cf1d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_begin_call_block_call.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...22)(
+         [BeginNode(2...22)(
+            (2...7),
+            StatementsNode(8...18)(
+              [CallNode(8...18)(
+                 CallNode(8...9)(
+                   nil,
+                   nil,
+                   (8...9),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "b"
+                 ),
+                 (9...10),
+                 (10...11),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(12...18)([], nil, nil, (12...14), (15...18)),
+                 0,
+                 "c"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (19...22)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_block_arg_named.txt b/test/yarp/snapshots/seattlerb/call_block_arg_named.txt
new file mode 100644
index 0000000000..e0d6cc8e03
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_block_arg_named.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...6)(
+         [BlockArgumentNode(2...6)(
+            CallNode(3...6)(nil, nil, (3...6), nil, nil, nil, nil, 0, "blk"),
+            (2...3)
+          )]
+       ),
+       (6...7),
+       nil,
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_carat.txt b/test/yarp/snapshots/seattlerb/call_carat.txt
new file mode 100644
index 0000000000..bea1ff7c68
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_carat.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       "^"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_colon2.txt b/test/yarp/snapshots/seattlerb/call_colon2.txt
new file mode 100644
index 0000000000..36955f3b23
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_colon2.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       ConstantReadNode(0...1)(),
+       (1...3),
+       (3...4),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_colon_parens.txt b/test/yarp/snapshots/seattlerb/call_colon_parens.txt
new file mode 100644
index 0000000000..2e707afcfb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_colon_parens.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       (1...3),
+       (0...0),
+       (3...4),
+       nil,
+       (4...5),
+       nil,
+       0,
+       "call"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_div.txt b/test/yarp/snapshots/seattlerb/call_div.txt
new file mode 100644
index 0000000000..f7caf10414
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_div.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       "/"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_dot_parens.txt b/test/yarp/snapshots/seattlerb/call_dot_parens.txt
new file mode 100644
index 0000000000..5a32c3b9cf
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_dot_parens.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       IntegerNode(0...1)(),
+       (1...2),
+       (0...0),
+       (2...3),
+       nil,
+       (3...4),
+       nil,
+       0,
+       "call"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_env.txt b/test/yarp/snapshots/seattlerb/call_env.txt
new file mode 100644
index 0000000000..9f2860ab56
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_env.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...7),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "happy"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_eq3.txt b/test/yarp/snapshots/seattlerb/call_eq3.txt
new file mode 100644
index 0000000000..192a3c97c5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_eq3.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...5),
+       nil,
+       ArgumentsNode(6...7)([IntegerNode(6...7)()]),
+       nil,
+       nil,
+       0,
+       "==="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_gt.txt b/test/yarp/snapshots/seattlerb/call_gt.txt
new file mode 100644
index 0000000000..9eadb5ee2f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_gt.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       ">"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_kwsplat.txt b/test/yarp/snapshots/seattlerb/call_kwsplat.txt
new file mode 100644
index 0000000000..c5b45b9cb2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_kwsplat.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...5)(
+         [KeywordHashNode(2...5)(
+            [AssocSplatNode(2...5)(IntegerNode(4...5)(), (2...4))]
+          )]
+       ),
+       (5...6),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_leading_dots.txt b/test/yarp/snapshots/seattlerb/call_leading_dots.txt
new file mode 100644
index 0000000000..47f2c8e5c5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_leading_dots.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (2...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b"
+       ),
+       (5...6),
+       (6...7),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "c"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_leading_dots_comment.txt b/test/yarp/snapshots/seattlerb/call_leading_dots_comment.txt
new file mode 100644
index 0000000000..0f64dd7e26
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_leading_dots_comment.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (2...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b"
+       ),
+       (9...10),
+       (10...11),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "d"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_lt.txt b/test/yarp/snapshots/seattlerb/call_lt.txt
new file mode 100644
index 0000000000..11fcd8c44f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_lt.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       "<"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_lte.txt b/test/yarp/snapshots/seattlerb/call_lte.txt
new file mode 100644
index 0000000000..5ad45cbf0e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_lte.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...4),
+       nil,
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       nil,
+       nil,
+       0,
+       "<="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_not.txt b/test/yarp/snapshots/seattlerb/call_not.txt
new file mode 100644
index 0000000000..d42b852ead
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_not.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       IntegerNode(4...6)(),
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_pipe.txt b/test/yarp/snapshots/seattlerb/call_pipe.txt
new file mode 100644
index 0000000000..e372fce6e5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_pipe.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       "|"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_rshift.txt b/test/yarp/snapshots/seattlerb/call_rshift.txt
new file mode 100644
index 0000000000..9a523669eb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_rshift.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...4),
+       nil,
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       nil,
+       nil,
+       0,
+       ">>"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_self_brackets.txt b/test/yarp/snapshots/seattlerb/call_self_brackets.txt
new file mode 100644
index 0000000000..7dfe5a50be
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_self_brackets.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       SelfNode(0...4)(),
+       nil,
+       (4...7),
+       (4...5),
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       (6...7),
+       nil,
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_spaceship.txt b/test/yarp/snapshots/seattlerb/call_spaceship.txt
new file mode 100644
index 0000000000..a7ee865978
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_spaceship.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...5),
+       nil,
+       ArgumentsNode(6...7)([IntegerNode(6...7)()]),
+       nil,
+       nil,
+       0,
+       "<=>"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_stabby_do_end_with_block.txt b/test/yarp/snapshots/seattlerb/call_stabby_do_end_with_block.txt
new file mode 100644
index 0000000000..e48578da2a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_stabby_do_end_with_block.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...13)(
+         [LambdaNode(2...13)(
+            [],
+            (2...4),
+            nil,
+            StatementsNode(8...9)([IntegerNode(8...9)()])
+          )]
+       ),
+       nil,
+       BlockNode(14...22)(
+         [],
+         nil,
+         StatementsNode(17...18)([IntegerNode(17...18)()]),
+         (14...16),
+         (19...22)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_stabby_with_braces_block.txt b/test/yarp/snapshots/seattlerb/call_stabby_with_braces_block.txt
new file mode 100644
index 0000000000..36fbd7fb1a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_stabby_with_braces_block.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [CallNode(0...19)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...10)(
+         [LambdaNode(2...10)(
+            [],
+            (2...4),
+            nil,
+            StatementsNode(7...8)([IntegerNode(7...8)()])
+          )]
+       ),
+       nil,
+       BlockNode(11...19)(
+         [],
+         nil,
+         StatementsNode(14...15)([IntegerNode(14...15)()]),
+         (11...13),
+         (16...19)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_star.txt b/test/yarp/snapshots/seattlerb/call_star.txt
new file mode 100644
index 0000000000..1e4683a882
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_star.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...3),
+       nil,
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       nil,
+       nil,
+       0,
+       "*"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_star2.txt b/test/yarp/snapshots/seattlerb/call_star2.txt
new file mode 100644
index 0000000000..d051c4a313
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_star2.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       IntegerNode(0...1)(),
+       nil,
+       (2...4),
+       nil,
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       nil,
+       nil,
+       0,
+       "**"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_trailing_comma.txt b/test/yarp/snapshots/seattlerb/call_trailing_comma.txt
new file mode 100644
index 0000000000..da971880af
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_trailing_comma.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...3)([IntegerNode(2...3)()]),
+       (4...5),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_trailing_dots.txt b/test/yarp/snapshots/seattlerb/call_trailing_dots.txt
new file mode 100644
index 0000000000..929decb5f1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_trailing_dots.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...2),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b"
+       ),
+       (4...5),
+       (6...7),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "c"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/call_unary_bang.txt b/test/yarp/snapshots/seattlerb/call_unary_bang.txt
new file mode 100644
index 0000000000..e0de2a924f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/call_unary_bang.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...2)(
+  [],
+  StatementsNode(0...2)(
+    [CallNode(0...2)(
+       IntegerNode(1...2)(),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in.txt b/test/yarp/snapshots/seattlerb/case_in.txt
new file mode 100644
index 0000000000..981905526c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in.txt
@@ -0,0 +1,607 @@
+ProgramNode(0...746)(
+  [:b, :_, :lhs, :x, :rhs, :c, :e],
+  StatementsNode(0...746)(
+    [CaseNode(0...20)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...16)(
+          HashPatternNode(12...16)(
+            nil,
+            [AssocNode(12...16)(
+               SymbolNode(12...16)((12...13), (13...14), (14...16), "b"),
+               nil,
+               nil
+             )],
+            nil,
+            nil,
+            nil
+          ),
+          nil,
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (17...20)
+     ),
+     CaseNode(22...44)(
+       SymbolNode(27...29)((27...28), (28...29), nil, "a"),
+       [InNode(30...40)(
+          ArrayNode(33...40)(
+            [SymbolNode(36...37)(nil, (36...37), nil, "a"),
+             SymbolNode(38...39)(nil, (38...39), nil, "b")],
+            (33...36),
+            (39...40)
+          ),
+          nil,
+          (30...32),
+          nil
+        )],
+       nil,
+       (22...26),
+       (41...44)
+     ),
+     CaseNode(46...68)(
+       SymbolNode(51...53)((51...52), (52...53), nil, "a"),
+       [InNode(54...64)(
+          ArrayNode(57...64)(
+            [StringNode(60...61)(nil, (60...61), nil, "a"),
+             StringNode(62...63)(nil, (62...63), nil, "b")],
+            (57...60),
+            (63...64)
+          ),
+          nil,
+          (54...56),
+          nil
+        )],
+       nil,
+       (46...50),
+       (65...68)
+     ),
+     CaseNode(70...92)(
+       SymbolNode(75...77)((75...76), (76...77), nil, "a"),
+       [InNode(78...88)(
+          ArrayNode(81...88)(
+            [SymbolNode(84...85)(nil, (84...85), nil, "a"),
+             SymbolNode(86...87)(nil, (86...87), nil, "b")],
+            (81...84),
+            (87...88)
+          ),
+          nil,
+          (78...80),
+          nil
+        )],
+       nil,
+       (70...74),
+       (89...92)
+     ),
+     CaseNode(94...116)(
+       SymbolNode(99...101)((99...100), (100...101), nil, "a"),
+       [InNode(102...112)(
+          ArrayNode(105...112)(
+            [StringNode(108...109)(nil, (108...109), nil, "a"),
+             StringNode(110...111)(nil, (110...111), nil, "b")],
+            (105...108),
+            (111...112)
+          ),
+          nil,
+          (102...104),
+          nil
+        )],
+       nil,
+       (94...98),
+       (113...116)
+     ),
+     CaseNode(118...140)(
+       SymbolNode(123...125)((123...124), (124...125), nil, "a"),
+       [InNode(126...135)(
+          RangeNode(130...135)(nil, IntegerNode(133...135)(), (130...133), 1),
+          nil,
+          (126...128),
+          nil
+        )],
+       nil,
+       (118...122),
+       (137...140)
+     ),
+     CaseNode(142...163)(
+       SymbolNode(147...149)((147...148), (148...149), nil, "a"),
+       [InNode(150...158)(
+          RangeNode(154...158)(nil, IntegerNode(156...158)(), (154...156), 0),
+          nil,
+          (150...152),
+          nil
+        )],
+       nil,
+       (142...146),
+       (160...163)
+     ),
+     CaseNode(165...186)(
+       SymbolNode(170...172)((170...171), (171...172), nil, "a"),
+       [InNode(173...181)(
+          RangeNode(177...181)(IntegerNode(177...178)(), nil, (178...181), 1),
+          nil,
+          (173...175),
+          nil
+        )],
+       nil,
+       (165...169),
+       (183...186)
+     ),
+     CaseNode(188...210)(
+       SymbolNode(193...195)((193...194), (194...195), nil, "a"),
+       [InNode(196...205)(
+          RangeNode(200...205)(
+            IntegerNode(200...201)(),
+            IntegerNode(204...205)(),
+            (201...204),
+            1
+          ),
+          nil,
+          (196...198),
+          nil
+        )],
+       nil,
+       (188...192),
+       (207...210)
+     ),
+     CaseNode(212...231)(
+       SymbolNode(217...219)((217...218), (218...219), nil, "a"),
+       [InNode(220...226)(IntegerNode(224...226)(), nil, (220...222), nil)],
+       nil,
+       (212...216),
+       (228...231)
+     ),
+     CaseNode(233...253)(
+       SymbolNode(238...240)((238...239), (239...240), nil, "a"),
+       [InNode(241...249)(
+          HashPatternNode(244...249)(
+            nil,
+            [NoKeywordsParameterNode(244...249)((244...246), (246...249))],
+            nil,
+            nil,
+            nil
+          ),
+          nil,
+          (241...243),
+          nil
+        )],
+       nil,
+       (233...237),
+       (250...253)
+     ),
+     CaseNode(255...278)(
+       SymbolNode(260...262)((260...261), (261...262), nil, "a"),
+       [InNode(263...274)(
+          RegularExpressionNode(266...274)(
+            (266...267),
+            (267...273),
+            (273...274),
+            "regexp",
+            0
+          ),
+          nil,
+          (263...265),
+          nil
+        )],
+       nil,
+       (255...259),
+       (275...278)
+     ),
+     CaseNode(280...305)(
+       SymbolNode(285...287)((285...286), (286...287), nil, "a"),
+       [InNode(288...301)(
+          ArrayPatternNode(291...301)(
+            nil,
+            [SymbolNode(291...293)((291...292), (292...293), nil, "b")],
+            SplatNode(295...297)(
+              (295...296),
+              LocalVariableWriteNode(296...297)(:_, 0, nil, (296...297), nil)
+            ),
+            [SymbolNode(299...301)((299...300), (300...301), nil, "c")],
+            nil,
+            nil
+          ),
+          nil,
+          (288...290),
+          nil
+        )],
+       nil,
+       (280...284),
+       (302...305)
+     ),
+     CaseNode(307...330)(
+       SymbolNode(312...314)((312...313), (313...314), nil, "a"),
+       [InNode(315...326)(
+          ArrayPatternNode(318...326)(
+            nil,
+            [SymbolNode(318...320)((318...319), (319...320), nil, "b"),
+             ArrayPatternNode(322...326)(
+               nil,
+               [SymbolNode(323...325)((323...324), (324...325), nil, "c")],
+               nil,
+               [],
+               (322...323),
+               (325...326)
+             )],
+            nil,
+            [],
+            nil,
+            nil
+          ),
+          nil,
+          (315...317),
+          nil
+        )],
+       nil,
+       (307...311),
+       (327...330)
+     ),
+     CaseNode(332...355)(
+       SymbolNode(337...339)((337...338), (338...339), nil, "a"),
+       [InNode(340...351)(
+          ArrayPatternNode(343...351)(
+            ConstantReadNode(343...349)(),
+            [],
+            nil,
+            [],
+            (349...350),
+            (350...351)
+          ),
+          nil,
+          (340...342),
+          nil
+        )],
+       nil,
+       (332...336),
+       (352...355)
+     ),
+     CaseNode(357...393)(
+       SymbolNode(362...364)((362...363), (363...364), nil, "a"),
+       [InNode(365...389)(
+          FindPatternNode(368...389)(
+            ConstantReadNode(368...374)(),
+            SplatNode(375...379)(
+              (375...376),
+              LocalVariableWriteNode(376...379)(:lhs, 0, nil, (376...379), nil)
+            ),
+            [LocalVariableWriteNode(381...382)(:x, 0, nil, (381...382), nil)],
+            SplatNode(384...388)(
+              (384...385),
+              LocalVariableWriteNode(385...388)(:rhs, 0, nil, (385...388), nil)
+            ),
+            (374...375),
+            (388...389)
+          ),
+          nil,
+          (365...367),
+          nil
+        )],
+       nil,
+       (357...361),
+       (390...393)
+     ),
+     CaseNode(395...431)(
+       SymbolNode(400...402)((400...401), (401...402), nil, "a"),
+       [InNode(403...427)(
+          FindPatternNode(406...427)(
+            ConstantReadNode(406...412)(),
+            SplatNode(413...417)(
+              (413...414),
+              LocalVariableWriteNode(414...417)(:lhs, 0, nil, (414...417), nil)
+            ),
+            [LocalVariableWriteNode(419...420)(:x, 0, nil, (419...420), nil)],
+            SplatNode(422...426)(
+              (422...423),
+              LocalVariableWriteNode(423...426)(:rhs, 0, nil, (423...426), nil)
+            ),
+            (412...413),
+            (426...427)
+          ),
+          nil,
+          (403...405),
+          nil
+        )],
+       nil,
+       (395...399),
+       (428...431)
+     ),
+     CaseNode(433...467)(
+       SymbolNode(438...440)((438...439), (439...440), nil, "a"),
+       [InNode(441...463)(
+          ArrayPatternNode(444...463)(
+            nil,
+            [LambdaNode(445...459)(
+               [:b],
+               (445...447),
+               BlockParametersNode(447...450)(
+                 ParametersNode(448...449)(
+                   [RequiredParameterNode(448...449)(:b)],
+                   [],
+                   [],
+                   nil,
+                   [],
+                   nil,
+                   nil
+                 ),
+                 [],
+                 (447...448),
+                 (449...450)
+               ),
+               StatementsNode(453...457)([TrueNode(453...457)()])
+             ),
+             LocalVariableWriteNode(461...462)(:c, 0, nil, (461...462), nil)],
+            nil,
+            [],
+            (444...445),
+            (462...463)
+          ),
+          nil,
+          (441...443),
+          nil
+        )],
+       nil,
+       (433...437),
+       (464...467)
+     ),
+     CaseNode(469...509)(
+       SymbolNode(474...476)((474...475), (475...476), nil, "a"),
+       [InNode(477...505)(
+          ArrayPatternNode(480...505)(
+            nil,
+            [SymbolNode(481...483)((481...482), (482...483), nil, "a"),
+             LocalVariableWriteNode(485...486)(:b, 0, nil, (485...486), nil),
+             LocalVariableWriteNode(488...489)(:c, 0, nil, (488...489), nil),
+             ArrayPatternNode(491...504)(
+               nil,
+               [SymbolNode(492...494)((492...493), (493...494), nil, "d")],
+               SplatNode(496...498)(
+                 (496...497),
+                 LocalVariableWriteNode(497...498)(
+                   :e,
+                   0,
+                   nil,
+                   (497...498),
+                   nil
+                 )
+               ),
+               [NilNode(500...503)()],
+               (491...492),
+               (503...504)
+             )],
+            nil,
+            [],
+            (480...481),
+            (504...505)
+          ),
+          nil,
+          (477...479),
+          nil
+        )],
+       nil,
+       (469...473),
+       (506...509)
+     ),
+     CaseNode(511...535)(
+       SymbolNode(516...518)((516...517), (517...518), nil, "a"),
+       [InNode(519...531)(
+          ArrayPatternNode(522...531)(
+            nil,
+            [ConstantReadNode(523...524)()],
+            SplatNode(526...527)((526...527), nil),
+            [ConstantReadNode(529...530)()],
+            (522...523),
+            (530...531)
+          ),
+          nil,
+          (519...521),
+          nil
+        )],
+       nil,
+       (511...515),
+       (532...535)
+     ),
+     CaseNode(537...571)(
+       SymbolNode(542...544)((542...543), (543...544), nil, "a"),
+       [InNode(545...567)(
+          ArrayPatternNode(548...567)(
+            nil,
+            [ArrayPatternNode(549...556)(
+               nil,
+               [SymbolNode(550...552)((550...551), (551...552), nil, "b"),
+                LocalVariableWriteNode(554...555)(
+                  :c,
+                  0,
+                  nil,
+                  (554...555),
+                  nil
+                )],
+               nil,
+               [],
+               (549...550),
+               (555...556)
+             ),
+             ArrayPatternNode(558...566)(
+               nil,
+               [SymbolNode(559...561)((559...560), (560...561), nil, "d"),
+                PinnedVariableNode(563...565)(
+                  LocalVariableReadNode(564...565)(:e, 0),
+                  (563...564)
+                )],
+               nil,
+               [],
+               (558...559),
+               (565...566)
+             )],
+            nil,
+            [],
+            (548...549),
+            (566...567)
+          ),
+          nil,
+          (545...547),
+          nil
+        )],
+       nil,
+       (537...541),
+       (568...571)
+     ),
+     CaseNode(573...590)(
+       SymbolNode(578...580)((578...579), (579...580), nil, "a"),
+       [InNode(581...586)(
+          ArrayPatternNode(584...586)(
+            nil,
+            [],
+            nil,
+            [],
+            (584...585),
+            (585...586)
+          ),
+          nil,
+          (581...583),
+          nil
+        )],
+       nil,
+       (573...577),
+       (587...590)
+     ),
+     CaseNode(592...613)(
+       SymbolNode(597...599)((597...598), (598...599), nil, "a"),
+       [InNode(600...609)(
+          ArrayPatternNode(603...609)(
+            nil,
+            [PinnedExpressionNode(604...608)(
+               CallNode(606...607)(
+                 nil,
+                 nil,
+                 (606...607),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "a"
+               ),
+               (604...605),
+               (605...606),
+               (607...608)
+             )],
+            nil,
+            [],
+            (603...604),
+            (608...609)
+          ),
+          nil,
+          (600...602),
+          nil
+        )],
+       nil,
+       (592...596),
+       (610...613)
+     ),
+     CaseNode(615...646)(
+       SymbolNode(620...622)((620...621), (621...622), nil, "a"),
+       [InNode(623...642)(
+          ArrayPatternNode(626...642)(
+            nil,
+            [PinnedVariableNode(627...630)(
+               InstanceVariableReadNode(628...630)(),
+               (627...628)
+             ),
+             PinnedVariableNode(632...635)(
+               GlobalVariableReadNode(633...635)(),
+               (632...633)
+             ),
+             PinnedVariableNode(637...641)(
+               ClassVariableReadNode(638...641)(),
+               (637...638)
+             )],
+            nil,
+            [],
+            (626...627),
+            (641...642)
+          ),
+          nil,
+          (623...625),
+          nil
+        )],
+       nil,
+       (615...619),
+       (643...646)
+     ),
+     CaseNode(648...672)(
+       SymbolNode(653...655)((653...654), (654...655), nil, "a"),
+       [InNode(656...668)(
+          XStringNode(659...668)(
+            (659...660),
+            (660...667),
+            (667...668),
+            "echo hi"
+          ),
+          nil,
+          (656...658),
+          nil
+        )],
+       nil,
+       (648...652),
+       (669...672)
+     ),
+     CaseNode(674...702)(
+       SymbolNode(679...681)((679...680), (680...681), nil, "a"),
+       [InNode(682...698)(
+          ArrayPatternNode(685...698)(
+            nil,
+            [NilNode(685...688)(), NilNode(690...693)(), NilNode(695...698)()],
+            nil,
+            [],
+            nil,
+            nil
+          ),
+          nil,
+          (682...684),
+          nil
+        )],
+       nil,
+       (674...678),
+       (699...702)
+     ),
+     CaseNode(704...727)(
+       SymbolNode(709...711)((709...710), (710...711), nil, "a"),
+       [InNode(712...723)(
+          HashPatternNode(715...723)(
+            nil,
+            [AssocNode(717...721)(
+               SymbolNode(717...721)(
+                 (717...718),
+                 (718...719),
+                 (719...721),
+                 "b"
+               ),
+               nil,
+               nil
+             )],
+            nil,
+            (715...716),
+            (722...723)
+          ),
+          nil,
+          (712...714),
+          nil
+        )],
+       nil,
+       (704...708),
+       (724...727)
+     ),
+     CaseNode(729...746)(
+       SymbolNode(734...736)((734...735), (735...736), nil, "a"),
+       [InNode(737...742)(
+          HashPatternNode(740...742)(nil, [], nil, (740...741), (741...742)),
+          nil,
+          (737...739),
+          nil
+        )],
+       nil,
+       (729...733),
+       (743...746)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_31.txt b/test/yarp/snapshots/seattlerb/case_in_31.txt
new file mode 100644
index 0000000000..26ff5c913f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_31.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...28)(
+  [:c],
+  StatementsNode(0...28)(
+    [CaseNode(0...28)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...24)(
+          ArrayPatternNode(11...19)(
+            nil,
+            [SymbolNode(12...14)((12...13), (13...14), nil, "b")],
+            SplatNode(16...18)(
+              (16...17),
+              LocalVariableWriteNode(17...18)(:c, 0, nil, (17...18), nil)
+            ),
+            [],
+            (11...12),
+            (18...19)
+          ),
+          StatementsNode(22...24)(
+            [SymbolNode(22...24)((22...23), (23...24), nil, "d")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_37.txt b/test/yarp/snapshots/seattlerb/case_in_37.txt
new file mode 100644
index 0000000000..721c6173d5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_37.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...36)(
+  [],
+  StatementsNode(0...36)(
+    [CaseNode(0...36)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...32)(
+          HashPatternNode(11...27)(
+            nil,
+            [AssocNode(13...25)(
+               SymbolNode(13...15)(nil, (13...14), (14...15), "b"),
+               ArrayPatternNode(16...25)(
+                 nil,
+                 [ConstantReadNode(17...21)()],
+                 SplatNode(23...24)((23...24), nil),
+                 [],
+                 (16...17),
+                 (24...25)
+               ),
+               nil
+             )],
+            nil,
+            (11...12),
+            (26...27)
+          ),
+          StatementsNode(30...32)(
+            [SymbolNode(30...32)((30...31), (31...32), nil, "c")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (33...36)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_42.txt b/test/yarp/snapshots/seattlerb/case_in_42.txt
new file mode 100644
index 0000000000..7cd17bb0e1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_42.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...30)(
+  [:_],
+  StatementsNode(0...30)(
+    [CaseNode(0...30)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...26)(
+          ArrayPatternNode(11...17)(
+            nil,
+            [SymbolNode(11...13)((11...12), (12...13), nil, "b")],
+            SplatNode(15...17)(
+              (15...16),
+              LocalVariableWriteNode(16...17)(:_, 0, nil, (16...17), nil)
+            ),
+            [],
+            nil,
+            nil
+          ),
+          StatementsNode(23...26)([NilNode(23...26)()]),
+          (8...10),
+          (18...22)
+        )],
+       nil,
+       (0...4),
+       (27...30)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_42_2.txt b/test/yarp/snapshots/seattlerb/case_in_42_2.txt
new file mode 100644
index 0000000000..7c0c87e98c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_42_2.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...32)(
+  [:list],
+  StatementsNode(0...32)(
+    [CaseNode(0...32)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...28)(
+          ArrayPatternNode(11...19)(
+            ConstantReadNode(11...12)(),
+            [],
+            SplatNode(13...18)(
+              (13...14),
+              LocalVariableWriteNode(14...18)(:list, 0, nil, (14...18), nil)
+            ),
+            [],
+            (12...13),
+            (18...19)
+          ),
+          StatementsNode(25...28)([NilNode(25...28)()]),
+          (8...10),
+          (20...24)
+        )],
+       nil,
+       (0...4),
+       (29...32)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_47.txt b/test/yarp/snapshots/seattlerb/case_in_47.txt
new file mode 100644
index 0000000000..727efebdde
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_47.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CaseNode(0...31)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...27)(
+          ArrayPatternNode(11...22)(
+            nil,
+            [],
+            SplatNode(12...13)((12...13), nil),
+            [SymbolNode(15...17)((15...16), (16...17), nil, "b"),
+             SymbolNode(19...21)((19...20), (20...21), nil, "c")],
+            (11...12),
+            (21...22)
+          ),
+          StatementsNode(25...27)(
+            [SymbolNode(25...27)((25...26), (26...27), nil, "d")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (28...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_67.txt b/test/yarp/snapshots/seattlerb/case_in_67.txt
new file mode 100644
index 0000000000..094d6711aa
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_67.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [CaseNode(0...27)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...23)(
+          RangeNode(11...14)(IntegerNode(11...12)(), nil, (12...14), 0),
+          StatementsNode(20...23)([NilNode(20...23)()]),
+          (8...10),
+          (15...19)
+        )],
+       nil,
+       (0...4),
+       (24...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_86.txt b/test/yarp/snapshots/seattlerb/case_in_86.txt
new file mode 100644
index 0000000000..0475e9ef9a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_86.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [CaseNode(0...43)(
+       ArrayNode(5...13)(
+         [SymbolNode(6...8)((6...7), (7...8), nil, "a"),
+          SymbolNode(10...12)((10...11), (11...12), nil, "b")],
+         (5...6),
+         (12...13)
+       ),
+       [InNode(14...39)(
+          ArrayPatternNode(17...30)(
+            nil,
+            [ConstantPathNode(17...27)(
+               nil,
+               ConstantReadNode(19...27)(),
+               (17...19)
+             )],
+            SplatNode(29...30)((29...30), nil),
+            [],
+            nil,
+            nil
+          ),
+          StatementsNode(36...39)([NilNode(36...39)()]),
+          (14...16),
+          (31...35)
+        )],
+       nil,
+       (0...4),
+       (40...43)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_86_2.txt b/test/yarp/snapshots/seattlerb/case_in_86_2.txt
new file mode 100644
index 0000000000..067835c5be
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_86_2.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [CaseNode(0...43)(
+       ArrayNode(5...13)(
+         [SymbolNode(6...8)((6...7), (7...8), nil, "a"),
+          SymbolNode(10...12)((10...11), (11...12), nil, "b")],
+         (5...6),
+         (12...13)
+       ),
+       [InNode(14...39)(
+          ArrayPatternNode(17...30)(
+            nil,
+            [],
+            SplatNode(17...18)((17...18), nil),
+            [ConstantPathNode(20...30)(
+               nil,
+               ConstantReadNode(22...30)(),
+               (20...22)
+             )],
+            nil,
+            nil
+          ),
+          StatementsNode(36...39)([NilNode(36...39)()]),
+          (14...16),
+          (31...35)
+        )],
+       nil,
+       (0...4),
+       (40...43)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_array_pat_const.txt b/test/yarp/snapshots/seattlerb/case_in_array_pat_const.txt
new file mode 100644
index 0000000000..b8eee48203
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_array_pat_const.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...24)(
+  [:c],
+  StatementsNode(0...24)(
+    [CaseNode(0...24)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...20)(
+          ArrayPatternNode(11...15)(
+            ConstantReadNode(11...12)(),
+            [LocalVariableWriteNode(13...14)(:c, 0, nil, (13...14), nil)],
+            nil,
+            [],
+            (12...13),
+            (14...15)
+          ),
+          StatementsNode(18...20)(
+            [SymbolNode(18...20)((18...19), (19...20), nil, "d")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (21...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_array_pat_const2.txt b/test/yarp/snapshots/seattlerb/case_in_array_pat_const2.txt
new file mode 100644
index 0000000000..2e29ef9d16
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_array_pat_const2.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...27)(
+  [:d],
+  StatementsNode(0...27)(
+    [CaseNode(0...27)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...23)(
+          ArrayPatternNode(11...18)(
+            ConstantPathNode(11...15)(
+              ConstantReadNode(11...12)(),
+              ConstantReadNode(14...15)(),
+              (12...14)
+            ),
+            [LocalVariableWriteNode(16...17)(:d, 0, nil, (16...17), nil)],
+            nil,
+            [],
+            (15...16),
+            (17...18)
+          ),
+          StatementsNode(21...23)(
+            [SymbolNode(21...23)((21...22), (22...23), nil, "e")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (24...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_array_pat_paren_assign.txt b/test/yarp/snapshots/seattlerb/case_in_array_pat_paren_assign.txt
new file mode 100644
index 0000000000..85b069fb00
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_array_pat_paren_assign.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...29)(
+  [:d],
+  StatementsNode(0...29)(
+    [CaseNode(0...29)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...25)(
+          ArrayPatternNode(11...20)(
+            ConstantReadNode(11...12)(),
+            [CapturePatternNode(13...19)(
+               ConstantReadNode(13...14)(),
+               LocalVariableWriteNode(18...19)(:d, 0, nil, (18...19), nil),
+               (15...17)
+             )],
+            nil,
+            [],
+            (12...13),
+            (19...20)
+          ),
+          StatementsNode(23...25)(
+            [SymbolNode(23...25)((23...24), (24...25), nil, "d")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_const.txt b/test/yarp/snapshots/seattlerb/case_in_const.txt
new file mode 100644
index 0000000000..3f8dde74fd
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_const.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CaseNode(0...28)(
+       ConstantReadNode(5...10)(),
+       [InNode(11...24)(
+          ConstantReadNode(14...19)(),
+          StatementsNode(22...24)(
+            [SymbolNode(22...24)((22...23), (23...24), nil, "b")]
+          ),
+          (11...13),
+          nil
+        )],
+       nil,
+       (0...4),
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_else.txt b/test/yarp/snapshots/seattlerb/case_in_else.txt
new file mode 100644
index 0000000000..fe2e6e7ee9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_else.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...38)(
+  [],
+  StatementsNode(0...38)(
+    [CaseNode(0...38)(
+       ConstantReadNode(5...10)(),
+       [InNode(11...24)(
+          ConstantReadNode(14...19)(),
+          StatementsNode(22...24)(
+            [SymbolNode(22...24)((22...23), (23...24), nil, "b")]
+          ),
+          (11...13),
+          nil
+        )],
+       ElseNode(25...38)(
+         (25...29),
+         StatementsNode(32...34)(
+           [SymbolNode(32...34)((32...33), (33...34), nil, "c")]
+         ),
+         (35...38)
+       ),
+       (0...4),
+       (35...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_find.txt b/test/yarp/snapshots/seattlerb/case_in_find.txt
new file mode 100644
index 0000000000..2d36642369
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_find.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...27)(
+  [:a, :b],
+  StatementsNode(0...27)(
+    [CaseNode(0...27)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(10...23)(
+          FindPatternNode(13...23)(
+            nil,
+            SplatNode(13...15)(
+              (13...14),
+              LocalVariableWriteNode(14...15)(:a, 0, nil, (14...15), nil)
+            ),
+            [SymbolNode(17...19)((17...18), (18...19), nil, "+")],
+            SplatNode(21...23)(
+              (21...22),
+              LocalVariableWriteNode(22...23)(:b, 0, nil, (22...23), nil)
+            ),
+            nil,
+            nil
+          ),
+          nil,
+          (10...12),
+          nil
+        )],
+       nil,
+       (0...4),
+       (24...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_find_array.txt b/test/yarp/snapshots/seattlerb/case_in_find_array.txt
new file mode 100644
index 0000000000..410fda576a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_find_array.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...28)(
+  [:c],
+  StatementsNode(0...28)(
+    [CaseNode(0...28)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...24)(
+          FindPatternNode(11...24)(
+            nil,
+            SplatNode(12...13)((12...13), nil),
+            [SymbolNode(15...17)((15...16), (16...17), nil, "b"),
+             LocalVariableWriteNode(19...20)(:c, 0, nil, (19...20), nil)],
+            SplatNode(22...23)((22...23), nil),
+            (11...12),
+            (23...24)
+          ),
+          nil,
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_hash_pat.txt b/test/yarp/snapshots/seattlerb/case_in_hash_pat.txt
new file mode 100644
index 0000000000..b7c8e7eb82
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_hash_pat.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [CaseNode(0...43)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...39)(
+          HashPatternNode(11...29)(
+            nil,
+            [AssocNode(13...19)(
+               SymbolNode(13...15)(nil, (13...14), (14...15), "b"),
+               StringNode(16...19)((16...17), (17...18), (18...19), "c"),
+               nil
+             ),
+             AssocNode(21...27)(
+               SymbolNode(21...23)(nil, (21...22), (22...23), "d"),
+               StringNode(24...27)((24...25), (25...26), (26...27), "e"),
+               nil
+             )],
+            nil,
+            (11...12),
+            (28...29)
+          ),
+          StatementsNode(37...39)(
+            [SymbolNode(37...39)((37...38), (38...39), nil, "f")]
+          ),
+          (8...10),
+          (30...34)
+        )],
+       nil,
+       (0...4),
+       (40...43)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_hash_pat_assign.txt b/test/yarp/snapshots/seattlerb/case_in_hash_pat_assign.txt
new file mode 100644
index 0000000000..92933ca071
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_hash_pat_assign.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...56)(
+  [:x, :f],
+  StatementsNode(0...56)(
+    [CaseNode(0...56)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...52)(
+          HashPatternNode(11...42)(
+            nil,
+            [AssocNode(13...28)(
+               SymbolNode(13...15)(nil, (13...14), (14...15), "b"),
+               CapturePatternNode(16...28)(
+                 ConstantReadNode(16...23)(),
+                 LocalVariableWriteNode(27...28)(:x, 0, nil, (27...28), nil),
+                 (24...26)
+               ),
+               nil
+             ),
+             AssocNode(30...36)(
+               SymbolNode(30...32)(nil, (30...31), (31...32), "d"),
+               StringNode(33...36)((33...34), (34...35), (35...36), "e"),
+               nil
+             ),
+             AssocNode(38...40)(
+               SymbolNode(38...40)(nil, (38...39), (39...40), "f"),
+               nil,
+               nil
+             )],
+            nil,
+            (11...12),
+            (41...42)
+          ),
+          StatementsNode(50...52)(
+            [SymbolNode(50...52)((50...51), (51...52), nil, "g")]
+          ),
+          (8...10),
+          (43...47)
+        )],
+       nil,
+       (0...4),
+       (53...56)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_hash_pat_paren_assign.txt b/test/yarp/snapshots/seattlerb/case_in_hash_pat_paren_assign.txt
new file mode 100644
index 0000000000..2b822fdd44
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_hash_pat_paren_assign.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CaseNode(0...28)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...24)(
+          HashPatternNode(11...19)(
+            ConstantReadNode(11...12)(),
+            [AssocNode(13...18)(
+               SymbolNode(13...15)(nil, (13...14), (14...15), "a"),
+               IntegerNode(16...18)(),
+               nil
+             )],
+            nil,
+            (12...13),
+            (18...19)
+          ),
+          StatementsNode(22...24)(
+            [SymbolNode(22...24)((22...23), (23...24), nil, "d")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_hash_pat_paren_true.txt b/test/yarp/snapshots/seattlerb/case_in_hash_pat_paren_true.txt
new file mode 100644
index 0000000000..c1bc104eff
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_hash_pat_paren_true.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...32)(
+  [],
+  StatementsNode(0...32)(
+    [CaseNode(0...32)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...28)(
+          HashPatternNode(11...18)(
+            nil,
+            [AssocNode(11...18)(
+               SymbolNode(11...13)(nil, (11...12), (12...13), "b"),
+               TrueNode(14...18)(),
+               nil
+             )],
+            nil,
+            nil,
+            nil
+          ),
+          StatementsNode(26...28)(
+            [SymbolNode(26...28)((26...27), (27...28), nil, "c")]
+          ),
+          (8...10),
+          (19...23)
+        )],
+       nil,
+       (0...4),
+       (29...32)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_hash_pat_rest.txt b/test/yarp/snapshots/seattlerb/case_in_hash_pat_rest.txt
new file mode 100644
index 0000000000..ed7b166852
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_hash_pat_rest.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...35)(
+  [:c, :rest],
+  StatementsNode(0...35)(
+    [CaseNode(0...35)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...31)(
+          HashPatternNode(11...23)(
+            nil,
+            [AssocNode(11...15)(
+               SymbolNode(11...13)(nil, (11...12), (12...13), "b"),
+               LocalVariableWriteNode(14...15)(:c, 0, nil, (14...15), nil),
+               nil
+             ),
+             AssocSplatNode(17...23)(
+               LocalVariableWriteNode(19...23)(:rest, 0, nil, (19...23), nil),
+               (17...19)
+             )],
+            nil,
+            nil,
+            nil
+          ),
+          StatementsNode(29...31)(
+            [SymbolNode(29...31)((29...30), (30...31), nil, "d")]
+          ),
+          (8...10),
+          (24...28)
+        )],
+       nil,
+       (0...4),
+       (32...35)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_hash_pat_rest_solo.txt b/test/yarp/snapshots/seattlerb/case_in_hash_pat_rest_solo.txt
new file mode 100644
index 0000000000..7bdc02e6fb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_hash_pat_rest_solo.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...29)(
+  [:rest],
+  StatementsNode(0...29)(
+    [CaseNode(0...29)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...25)(
+          HashPatternNode(11...17)(
+            nil,
+            [AssocSplatNode(11...17)(
+               LocalVariableWriteNode(13...17)(:rest, 0, nil, (13...17), nil),
+               (11...13)
+             )],
+            nil,
+            nil,
+            nil
+          ),
+          StatementsNode(23...25)(
+            [SymbolNode(23...25)((23...24), (24...25), nil, "d")]
+          ),
+          (8...10),
+          (18...22)
+        )],
+       nil,
+       (0...4),
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_if_unless_post_mod.txt b/test/yarp/snapshots/seattlerb/case_in_if_unless_post_mod.txt
new file mode 100644
index 0000000000..5091c3d7f9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_if_unless_post_mod.txt
@@ -0,0 +1,39 @@
+ProgramNode(0...52)(
+  [],
+  StatementsNode(0...52)(
+    [CaseNode(0...52)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...25)(
+          IfNode(11...20)(
+            (13...15),
+            TrueNode(16...20)(),
+            StatementsNode(11...12)([ConstantReadNode(11...12)()]),
+            nil,
+            nil
+          ),
+          StatementsNode(23...25)(
+            [SymbolNode(23...25)((23...24), (24...25), nil, "C")]
+          ),
+          (8...10),
+          nil
+        ),
+        InNode(26...48)(
+          UnlessNode(29...43)(
+            (31...37),
+            FalseNode(38...43)(),
+            StatementsNode(29...30)([ConstantReadNode(29...30)()]),
+            nil,
+            nil
+          ),
+          StatementsNode(46...48)(
+            [SymbolNode(46...48)((46...47), (47...48), nil, "E")]
+          ),
+          (26...28),
+          nil
+        )],
+       nil,
+       (0...4),
+       (49...52)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_multiple.txt b/test/yarp/snapshots/seattlerb/case_in_multiple.txt
new file mode 100644
index 0000000000..e35b87ff5c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_multiple.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [CaseNode(0...37)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...20)(
+          ConstantPathNode(11...15)(
+            ConstantReadNode(11...12)(),
+            ConstantReadNode(14...15)(),
+            (12...14)
+          ),
+          StatementsNode(18...20)(
+            [SymbolNode(18...20)((18...19), (19...20), nil, "C")]
+          ),
+          (8...10),
+          nil
+        ),
+        InNode(21...33)(
+          ConstantPathNode(24...28)(
+            ConstantReadNode(24...25)(),
+            ConstantReadNode(27...28)(),
+            (25...27)
+          ),
+          StatementsNode(31...33)(
+            [SymbolNode(31...33)((31...32), (32...33), nil, "F")]
+          ),
+          (21...23),
+          nil
+        )],
+       nil,
+       (0...4),
+       (34...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/case_in_or.txt b/test/yarp/snapshots/seattlerb/case_in_or.txt
new file mode 100644
index 0000000000..a8c251b414
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/case_in_or.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CaseNode(0...25)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...21)(
+          AlternationPatternNode(11...16)(
+            ConstantReadNode(11...12)(),
+            ConstantReadNode(15...16)(),
+            (13...14)
+          ),
+          StatementsNode(19...21)(
+            [SymbolNode(19...21)((19...20), (20...21), nil, "d")]
+          ),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (22...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/class_comments.txt b/test/yarp/snapshots/seattlerb/class_comments.txt
new file mode 100644
index 0000000000..12b347ee8a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/class_comments.txt
@@ -0,0 +1,28 @@
+ProgramNode(19...71)(
+  [],
+  StatementsNode(19...71)(
+    [ClassNode(19...71)(
+       [],
+       (19...24),
+       ConstantReadNode(25...26)(),
+       nil,
+       nil,
+       StatementsNode(40...67)(
+         [DefNode(40...67)(
+            (44...48),
+            nil,
+            nil,
+            nil,
+            [],
+            (40...43),
+            nil,
+            nil,
+            nil,
+            nil,
+            (64...67)
+          )]
+       ),
+       (68...71)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/cond_unary_minus.txt b/test/yarp/snapshots/seattlerb/cond_unary_minus.txt
new file mode 100644
index 0000000000..79d8f4a09a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/cond_unary_minus.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [IfNode(0...10)(
+       (0...2),
+       CallNode(3...5)(
+         IntegerNode(4...5)(),
+         nil,
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "-@"
+       ),
+       nil,
+       nil,
+       (7...10)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/const_2_op_asgn_or2.txt b/test/yarp/snapshots/seattlerb/const_2_op_asgn_or2.txt
new file mode 100644
index 0000000000..dfaac5447c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/const_2_op_asgn_or2.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [ConstantPathOperatorOrWriteNode(0...12)(
+       ConstantPathNode(0...6)(
+         ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+         ConstantReadNode(5...6)(),
+         (3...5)
+       ),
+       (7...10),
+       IntegerNode(11...12)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/const_3_op_asgn_or.txt b/test/yarp/snapshots/seattlerb/const_3_op_asgn_or.txt
new file mode 100644
index 0000000000..c9d4dbfe31
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/const_3_op_asgn_or.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [ConstantPathOperatorOrWriteNode(0...9)(
+       ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+       (4...7),
+       IntegerNode(8...9)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/const_op_asgn_and1.txt b/test/yarp/snapshots/seattlerb/const_op_asgn_and1.txt
new file mode 100644
index 0000000000..1e7dce0226
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/const_op_asgn_and1.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [ConstantPathOperatorWriteNode(0...8)(
+       ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+       (4...6),
+       IntegerNode(7...8)(),
+       :&
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/const_op_asgn_and2.txt b/test/yarp/snapshots/seattlerb/const_op_asgn_and2.txt
new file mode 100644
index 0000000000..85739dac2d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/const_op_asgn_and2.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [ConstantPathOperatorAndWriteNode(0...9)(
+       ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+       (4...7),
+       IntegerNode(8...9)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/const_op_asgn_or.txt b/test/yarp/snapshots/seattlerb/const_op_asgn_or.txt
new file mode 100644
index 0000000000..d1bfe6cd4d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/const_op_asgn_or.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [ConstantPathOperatorOrWriteNode(0...10)(
+       ConstantPathNode(0...4)(
+         ConstantReadNode(0...1)(),
+         ConstantReadNode(3...4)(),
+         (1...3)
+       ),
+       (5...8),
+       IntegerNode(9...10)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dasgn_icky2.txt b/test/yarp/snapshots/seattlerb/dasgn_icky2.txt
new file mode 100644
index 0000000000..26d5ca491c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dasgn_icky2.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...76)(
+  [],
+  StatementsNode(0...76)(
+    [CallNode(0...76)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...76)(
+         [:v],
+         nil,
+         StatementsNode(7...72)(
+           [LocalVariableWriteNode(7...14)(
+              :v,
+              0,
+              NilNode(11...14)(),
+              (7...8),
+              (9...10)
+            ),
+            BeginNode(17...72)(
+              (17...22),
+              StatementsNode(27...32)(
+                [YieldNode(27...32)((27...32), nil, nil, nil)]
+              ),
+              RescueNode(35...66)(
+                (35...41),
+                [ConstantReadNode(42...51)()],
+                (52...54),
+                LocalVariableWriteNode(55...56)(:v, 0, nil, (55...56), nil),
+                StatementsNode(61...66)([BreakNode(61...66)(nil, (61...66))]),
+                nil
+              ),
+              nil,
+              nil,
+              (69...72)
+            )]
+         ),
+         (2...4),
+         (73...76)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defined_eh_parens.txt b/test/yarp/snapshots/seattlerb/defined_eh_parens.txt
new file mode 100644
index 0000000000..5aedca1fbb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defined_eh_parens.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [DefinedNode(0...12)((8...9), IntegerNode(9...11)(), (11...12), (0...8))]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_arg_asplat_arg.txt b/test/yarp/snapshots/seattlerb/defn_arg_asplat_arg.txt
new file mode 100644
index 0000000000..6e7e9478f1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_arg_asplat_arg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [DefNode(0...29)(
+       (4...8),
+       nil,
+       ParametersNode(9...24)(
+         [RequiredParameterNode(9...15)(:interp)],
+         [],
+         [RequiredParameterNode(20...24)(:args)],
+         RestParameterNode(17...18)((17...18), nil),
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:interp, :*, :args],
+       (0...3),
+       nil,
+       (8...9),
+       (24...25),
+       nil,
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_arg_forward_args.txt b/test/yarp/snapshots/seattlerb/defn_arg_forward_args.txt
new file mode 100644
index 0000000000..c3e8e7d010
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_arg_forward_args.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [DefNode(0...29)(
+       (4...5),
+       nil,
+       ParametersNode(6...12)(
+         [RequiredParameterNode(6...7)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(9...12)(),
+         nil
+       ),
+       StatementsNode(15...24)(
+         [CallNode(15...24)(
+            nil,
+            nil,
+            (15...16),
+            (16...17),
+            ArgumentsNode(17...23)(
+              [LocalVariableReadNode(17...18)(:x, 0),
+               ForwardingArgumentsNode(20...23)()]
+            ),
+            (23...24),
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       [:x, :"..."],
+       (0...3),
+       nil,
+       (5...6),
+       (12...13),
+       nil,
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_args_forward_args.txt b/test/yarp/snapshots/seattlerb/defn_args_forward_args.txt
new file mode 100644
index 0000000000..c14a1868ed
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_args_forward_args.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...41)(
+  [],
+  StatementsNode(0...41)(
+    [DefNode(0...41)(
+       (4...5),
+       nil,
+       ParametersNode(6...18)(
+         [RequiredParameterNode(6...7)(:x),
+          RequiredParameterNode(9...10)(:y),
+          RequiredParameterNode(12...13)(:z)],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(15...18)(),
+         nil
+       ),
+       StatementsNode(21...36)(
+         [CallNode(21...36)(
+            nil,
+            nil,
+            (21...22),
+            (22...23),
+            ArgumentsNode(23...35)(
+              [SymbolNode(23...27)((23...24), (24...27), nil, "get"),
+               LocalVariableReadNode(29...30)(:z, 0),
+               ForwardingArgumentsNode(32...35)()]
+            ),
+            (35...36),
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       [:x, :y, :z, :"..."],
+       (0...3),
+       nil,
+       (5...6),
+       (18...19),
+       nil,
+       (38...41)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_comments.txt b/test/yarp/snapshots/seattlerb/defn_comments.txt
new file mode 100644
index 0000000000..1ff1c127bd
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_comments.txt
@@ -0,0 +1,18 @@
+ProgramNode(19...31)(
+  [],
+  StatementsNode(19...31)(
+    [DefNode(19...31)(
+       (23...27),
+       nil,
+       nil,
+       nil,
+       [],
+       (19...22),
+       nil,
+       nil,
+       nil,
+       nil,
+       (28...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_endless_command.txt b/test/yarp/snapshots/seattlerb/defn_endless_command.txt
new file mode 100644
index 0000000000..7e1989cf6f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_endless_command.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [DefNode(0...33)(
+       (4...15),
+       nil,
+       nil,
+       StatementsNode(18...33)(
+         [CallNode(18...33)(
+            nil,
+            nil,
+            (18...30),
+            nil,
+            ArgumentsNode(31...33)([IntegerNode(31...33)()]),
+            nil,
+            nil,
+            0,
+            "other_method"
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       (16...17),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_endless_command_rescue.txt b/test/yarp/snapshots/seattlerb/defn_endless_command_rescue.txt
new file mode 100644
index 0000000000..bed7b31b5a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_endless_command_rescue.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [DefNode(0...43)(
+       (4...15),
+       nil,
+       nil,
+       StatementsNode(18...43)(
+         [CallNode(18...43)(
+            nil,
+            nil,
+            (18...30),
+            nil,
+            ArgumentsNode(31...43)(
+              [RescueModifierNode(31...43)(
+                 IntegerNode(31...33)(),
+                 (34...40),
+                 IntegerNode(41...43)()
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "other_method"
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       (16...17),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_forward_args.txt b/test/yarp/snapshots/seattlerb/defn_forward_args.txt
new file mode 100644
index 0000000000..0fbe6f0d70
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_forward_args.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [DefNode(0...23)(
+       (4...5),
+       nil,
+       ParametersNode(6...9)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(6...9)(),
+         nil
+       ),
+       StatementsNode(12...18)(
+         [CallNode(12...18)(
+            nil,
+            nil,
+            (12...13),
+            (13...14),
+            ArgumentsNode(14...17)([ForwardingArgumentsNode(14...17)()]),
+            (17...18),
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       [:"..."],
+       (0...3),
+       nil,
+       (5...6),
+       (9...10),
+       nil,
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_env.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_env.txt
new file mode 100644
index 0000000000..5872579ee6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_env.txt
@@ -0,0 +1,45 @@
+ProgramNode(0...45)(
+  [],
+  StatementsNode(0...45)(
+    [DefNode(0...45)(
+       (4...8),
+       nil,
+       ParametersNode(9...18)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(9...18)((9...11), (11...18)),
+         nil
+       ),
+       StatementsNode(20...41)(
+         [CallNode(20...41)(
+            nil,
+            nil,
+            (20...30),
+            (30...31),
+            ArgumentsNode(31...40)(
+              [KeywordHashNode(31...40)(
+                 [AssocSplatNode(31...40)(
+                    LocalVariableReadNode(33...40)(:testing, 0),
+                    (31...33)
+                  )]
+               )]
+            ),
+            (40...41),
+            nil,
+            0,
+            "test_splat"
+          )]
+       ),
+       [:testing],
+       (0...3),
+       nil,
+       (8...9),
+       (18...19),
+       nil,
+       (42...45)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_kwarg.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_kwarg.txt
new file mode 100644
index 0000000000..6dcd4aaf2b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_kwarg.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [DefNode(0...24)(
+       (4...5),
+       nil,
+       ParametersNode(6...19)(
+         [RequiredParameterNode(6...7)(:a)],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(9...13)((9...11), IntegerNode(12...13)()),
+          KeywordParameterNode(15...19)((15...17), IntegerNode(18...19)())],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :b, :c],
+       (0...3),
+       nil,
+       (5...6),
+       (19...20),
+       nil,
+       (21...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_kwsplat.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_kwsplat.txt
new file mode 100644
index 0000000000..5bc6490a6f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_kwsplat.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [DefNode(0...20)(
+       (4...5),
+       nil,
+       ParametersNode(6...15)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...10)((6...8), IntegerNode(9...10)())],
+         KeywordRestParameterNode(12...15)((12...14), (14...15)),
+         nil
+       ),
+       nil,
+       [:b, :c],
+       (0...3),
+       nil,
+       (5...6),
+       (15...16),
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_kwsplat_anon.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_kwsplat_anon.txt
new file mode 100644
index 0000000000..3dfb42f6d7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_kwsplat_anon.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [DefNode(0...19)(
+       (4...5),
+       nil,
+       ParametersNode(6...14)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...10)((6...8), IntegerNode(9...10)())],
+         KeywordRestParameterNode(12...14)((12...14), nil),
+         nil
+       ),
+       nil,
+       [:b, :**],
+       (0...3),
+       nil,
+       (5...6),
+       (14...15),
+       nil,
+       (16...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_lvar.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_lvar.txt
new file mode 100644
index 0000000000..f4f6964c58
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_lvar.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [DefNode(0...26)(
+       (4...7),
+       nil,
+       ParametersNode(8...16)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(8...16)(
+            (8...11),
+            SymbolNode(12...16)((12...13), (13...16), nil, "val")
+          )],
+         nil,
+         nil
+       ),
+       StatementsNode(19...21)([LocalVariableReadNode(19...21)(:kw, 0)]),
+       [:kw],
+       (0...3),
+       nil,
+       (7...8),
+       (16...17),
+       nil,
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_no_parens.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_no_parens.txt
new file mode 100644
index 0000000000..b0649973ac
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_no_parens.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [DefNode(0...14)(
+       (4...5),
+       nil,
+       ParametersNode(6...10)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...10)((6...8), IntegerNode(9...10)())],
+         nil,
+         nil
+       ),
+       nil,
+       [:a],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (11...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_kwarg_val.txt b/test/yarp/snapshots/seattlerb/defn_kwarg_val.txt
new file mode 100644
index 0000000000..dfa99b7066
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_kwarg_val.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [DefNode(0...17)(
+       (4...5),
+       nil,
+       ParametersNode(6...12)(
+         [RequiredParameterNode(6...7)(:a)],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(9...12)((9...11), IntegerNode(11...12)())],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :b],
+       (0...3),
+       nil,
+       (5...6),
+       (12...13),
+       nil,
+       (14...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_no_kwargs.txt b/test/yarp/snapshots/seattlerb/defn_no_kwargs.txt
new file mode 100644
index 0000000000..a5046e04e4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_no_kwargs.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [DefNode(0...17)(
+       (4...5),
+       nil,
+       ParametersNode(6...11)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         NoKeywordsParameterNode(6...11)((6...8), (8...11)),
+         nil
+       ),
+       nil,
+       [],
+       (0...3),
+       nil,
+       (5...6),
+       (11...12),
+       nil,
+       (14...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_oneliner.txt b/test/yarp/snapshots/seattlerb/defn_oneliner.txt
new file mode 100644
index 0000000000..053400c564
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_oneliner.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [DefNode(0...27)(
+       (4...8),
+       nil,
+       ParametersNode(9...12)(
+         [RequiredParameterNode(9...12)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(16...27)(
+         [CallNode(16...27)(
+            nil,
+            nil,
+            (16...22),
+            (22...23),
+            ArgumentsNode(23...26)([LocalVariableReadNode(23...26)(:cmd, 0)]),
+            (26...27),
+            nil,
+            0,
+            "system"
+          )]
+       ),
+       [:cmd],
+       (0...3),
+       nil,
+       (8...9),
+       (12...13),
+       (14...15),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_oneliner_eq2.txt b/test/yarp/snapshots/seattlerb/defn_oneliner_eq2.txt
new file mode 100644
index 0000000000..30aaf7190e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_oneliner_eq2.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [ClassNode(0...28)(
+       [],
+       (0...5),
+       ConstantReadNode(6...7)(),
+       nil,
+       nil,
+       StatementsNode(10...24)(
+         [DefNode(10...24)(
+            (14...16),
+            nil,
+            ParametersNode(17...18)(
+              [RequiredParameterNode(17...18)(:o)],
+              [],
+              [],
+              nil,
+              [],
+              nil,
+              nil
+            ),
+            StatementsNode(22...24)([IntegerNode(22...24)()]),
+            [:o],
+            (10...13),
+            nil,
+            (16...17),
+            (18...19),
+            (20...21),
+            nil
+          )]
+       ),
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_oneliner_noargs.txt b/test/yarp/snapshots/seattlerb/defn_oneliner_noargs.txt
new file mode 100644
index 0000000000..b560a37f61
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_oneliner_noargs.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [DefNode(0...17)(
+       (4...8),
+       nil,
+       nil,
+       StatementsNode(11...17)(
+         [CallNode(11...17)(
+            nil,
+            nil,
+            (11...17),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "system"
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       (9...10),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_oneliner_noargs_parentheses.txt b/test/yarp/snapshots/seattlerb/defn_oneliner_noargs_parentheses.txt
new file mode 100644
index 0000000000..7a106c57d6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_oneliner_noargs_parentheses.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [DefNode(0...19)(
+       (4...8),
+       nil,
+       nil,
+       StatementsNode(13...19)(
+         [CallNode(13...19)(
+            nil,
+            nil,
+            (13...19),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "system"
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       (8...9),
+       (9...10),
+       (11...12),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_oneliner_rescue.txt b/test/yarp/snapshots/seattlerb/defn_oneliner_rescue.txt
new file mode 100644
index 0000000000..5032c52203
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_oneliner_rescue.txt
@@ -0,0 +1,132 @@
+ProgramNode(0...130)(
+  [],
+  StatementsNode(0...130)(
+    [DefNode(0...44)(
+       (4...8),
+       nil,
+       ParametersNode(9...12)(
+         [RequiredParameterNode(9...12)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       BeginNode(16...44)(
+         nil,
+         StatementsNode(16...27)(
+           [CallNode(16...27)(
+              nil,
+              nil,
+              (16...22),
+              (22...23),
+              ArgumentsNode(23...26)(
+                [LocalVariableReadNode(23...26)(:cmd, 0)]
+              ),
+              (26...27),
+              nil,
+              0,
+              "system"
+            )]
+         ),
+         RescueNode(28...40)(
+           (28...34),
+           [],
+           nil,
+           nil,
+           StatementsNode(37...40)([NilNode(37...40)()]),
+           nil
+         ),
+         nil,
+         nil,
+         (41...44)
+       ),
+       [:cmd],
+       (0...3),
+       nil,
+       (8...9),
+       (12...13),
+       nil,
+       (41...44)
+     ),
+     DefNode(47...89)(
+       (51...55),
+       nil,
+       ParametersNode(56...59)(
+         [RequiredParameterNode(56...59)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(63...85)(
+         [RescueModifierNode(63...85)(
+            CallNode(63...74)(
+              nil,
+              nil,
+              (63...69),
+              (69...70),
+              ArgumentsNode(70...73)(
+                [LocalVariableReadNode(70...73)(:cmd, 0)]
+              ),
+              (73...74),
+              nil,
+              0,
+              "system"
+            ),
+            (75...81),
+            NilNode(82...85)()
+          )]
+       ),
+       [:cmd],
+       (47...50),
+       nil,
+       (55...56),
+       (59...60),
+       nil,
+       (86...89)
+     ),
+     DefNode(92...130)(
+       (96...100),
+       nil,
+       ParametersNode(101...104)(
+         [RequiredParameterNode(101...104)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(108...130)(
+         [RescueModifierNode(108...130)(
+            CallNode(108...119)(
+              nil,
+              nil,
+              (108...114),
+              (114...115),
+              ArgumentsNode(115...118)(
+                [LocalVariableReadNode(115...118)(:cmd, 0)]
+              ),
+              (118...119),
+              nil,
+              0,
+              "system"
+            ),
+            (120...126),
+            NilNode(127...130)()
+          )]
+       ),
+       [:cmd],
+       (92...95),
+       nil,
+       (100...101),
+       (104...105),
+       (106...107),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_opt_last_arg.txt b/test/yarp/snapshots/seattlerb/defn_opt_last_arg.txt
new file mode 100644
index 0000000000..d4064d0f34
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_opt_last_arg.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [DefNode(0...21)(
+       (4...5),
+       nil,
+       ParametersNode(6...17)(
+         [],
+         [OptionalParameterNode(6...17)(
+            :arg,
+            (6...9),
+            (10...11),
+            FalseNode(12...17)()
+          )],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:arg],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (18...21)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_opt_reg.txt b/test/yarp/snapshots/seattlerb/defn_opt_reg.txt
new file mode 100644
index 0000000000..5796adf1e9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_opt_reg.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [DefNode(0...19)(
+       (4...5),
+       nil,
+       ParametersNode(6...14)(
+         [],
+         [OptionalParameterNode(6...11)(
+            :a,
+            (6...7),
+            (7...8),
+            NilNode(8...11)()
+          )],
+         [RequiredParameterNode(13...14)(:b)],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :b],
+       (0...3),
+       nil,
+       (5...6),
+       (14...15),
+       nil,
+       (16...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_opt_splat_arg.txt b/test/yarp/snapshots/seattlerb/defn_opt_splat_arg.txt
new file mode 100644
index 0000000000..cd181b55b3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_opt_splat_arg.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [DefNode(0...24)(
+       (4...5),
+       nil,
+       ParametersNode(7...19)(
+         [],
+         [OptionalParameterNode(7...12)(
+            :a,
+            (7...8),
+            (9...10),
+            IntegerNode(11...12)()
+          )],
+         [RequiredParameterNode(18...19)(:c)],
+         RestParameterNode(14...16)((14...15), (15...16)),
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :b, :c],
+       (0...3),
+       nil,
+       (6...7),
+       (19...20),
+       nil,
+       (21...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_powarg.txt b/test/yarp/snapshots/seattlerb/defn_powarg.txt
new file mode 100644
index 0000000000..a6d63f56cb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_powarg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [DefNode(0...17)(
+       (4...5),
+       nil,
+       ParametersNode(6...12)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(6...12)((6...8), (8...12)),
+         nil
+       ),
+       nil,
+       [:opts],
+       (0...3),
+       nil,
+       (5...6),
+       (12...13),
+       nil,
+       (14...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_reg_opt_reg.txt b/test/yarp/snapshots/seattlerb/defn_reg_opt_reg.txt
new file mode 100644
index 0000000000..c7e9c64087
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_reg_opt_reg.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [DefNode(0...23)(
+       (4...5),
+       nil,
+       ParametersNode(6...18)(
+         [RequiredParameterNode(6...7)(:a)],
+         [OptionalParameterNode(9...15)(
+            :b,
+            (9...10),
+            (11...12),
+            SymbolNode(13...15)((13...14), (14...15), nil, "c")
+          )],
+         [RequiredParameterNode(17...18)(:d)],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :b, :d],
+       (0...3),
+       nil,
+       (5...6),
+       (18...19),
+       nil,
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_splat_arg.txt b/test/yarp/snapshots/seattlerb/defn_splat_arg.txt
new file mode 100644
index 0000000000..0fb8bb01c1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_splat_arg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [DefNode(0...15)(
+       (4...5),
+       nil,
+       ParametersNode(6...10)(
+         [],
+         [],
+         [RequiredParameterNode(9...10)(:a)],
+         RestParameterNode(6...7)((6...7), nil),
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:*, :a],
+       (0...3),
+       nil,
+       (5...6),
+       (10...11),
+       nil,
+       (12...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defn_unary_not.txt b/test/yarp/snapshots/seattlerb/defn_unary_not.txt
new file mode 100644
index 0000000000..9fbee1764f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defn_unary_not.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [DefNode(0...17)(
+       (4...6),
+       nil,
+       nil,
+       StatementsNode(8...12)([TrueNode(8...12)()]),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (14...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defns_reserved.txt b/test/yarp/snapshots/seattlerb/defns_reserved.txt
new file mode 100644
index 0000000000..07b165898e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defns_reserved.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [DefNode(0...20)(
+       (9...15),
+       SelfNode(4...8)(),
+       nil,
+       nil,
+       [],
+       (0...3),
+       (8...9),
+       nil,
+       nil,
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_as_arg_with_do_block_inside.txt b/test/yarp/snapshots/seattlerb/defs_as_arg_with_do_block_inside.txt
new file mode 100644
index 0000000000..57e5932ab4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_as_arg_with_do_block_inside.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [CallNode(0...30)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...30)(
+         [DefNode(2...30)(
+            (11...12),
+            SelfNode(6...10)(),
+            nil,
+            StatementsNode(14...25)(
+              [CallNode(14...25)(
+                 CallNode(14...15)(
+                   nil,
+                   nil,
+                   (14...15),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "x"
+                 ),
+                 (15...16),
+                 (16...17),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(18...25)([], nil, nil, (18...20), (22...25)),
+                 0,
+                 "y"
+               )]
+            ),
+            [],
+            (2...5),
+            (10...11),
+            nil,
+            nil,
+            nil,
+            (27...30)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_comments.txt b/test/yarp/snapshots/seattlerb/defs_comments.txt
new file mode 100644
index 0000000000..55a3054373
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_comments.txt
@@ -0,0 +1,18 @@
+ProgramNode(19...36)(
+  [],
+  StatementsNode(19...36)(
+    [DefNode(19...36)(
+       (28...32),
+       SelfNode(23...27)(),
+       nil,
+       nil,
+       [],
+       (19...22),
+       (27...28),
+       nil,
+       nil,
+       nil,
+       (33...36)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_endless_command.txt b/test/yarp/snapshots/seattlerb/defs_endless_command.txt
new file mode 100644
index 0000000000..11572715af
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_endless_command.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...35)(
+  [],
+  StatementsNode(0...35)(
+    [DefNode(0...35)(
+       (6...17),
+       CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "x"),
+       nil,
+       StatementsNode(20...35)(
+         [CallNode(20...35)(
+            nil,
+            nil,
+            (20...32),
+            nil,
+            ArgumentsNode(33...35)([IntegerNode(33...35)()]),
+            nil,
+            nil,
+            0,
+            "other_method"
+          )]
+       ),
+       [],
+       (0...3),
+       (5...6),
+       nil,
+       nil,
+       (18...19),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_endless_command_rescue.txt b/test/yarp/snapshots/seattlerb/defs_endless_command_rescue.txt
new file mode 100644
index 0000000000..b657a3f19d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_endless_command_rescue.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...45)(
+  [],
+  StatementsNode(0...45)(
+    [DefNode(0...45)(
+       (6...17),
+       CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "x"),
+       nil,
+       StatementsNode(20...45)(
+         [CallNode(20...45)(
+            nil,
+            nil,
+            (20...32),
+            nil,
+            ArgumentsNode(33...45)(
+              [RescueModifierNode(33...45)(
+                 IntegerNode(33...35)(),
+                 (36...42),
+                 IntegerNode(43...45)()
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "other_method"
+          )]
+       ),
+       [],
+       (0...3),
+       (5...6),
+       nil,
+       nil,
+       (18...19),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_kwarg.txt b/test/yarp/snapshots/seattlerb/defs_kwarg.txt
new file mode 100644
index 0000000000..0309161b8e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_kwarg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [DefNode(0...19)(
+       (9...10),
+       SelfNode(4...8)(),
+       ParametersNode(11...15)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(11...15)((11...13), IntegerNode(14...15)())],
+         nil,
+         nil
+       ),
+       nil,
+       [:b],
+       (0...3),
+       (8...9),
+       nil,
+       nil,
+       nil,
+       (16...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_oneliner.txt b/test/yarp/snapshots/seattlerb/defs_oneliner.txt
new file mode 100644
index 0000000000..60ea01092f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_oneliner.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...32)(
+  [],
+  StatementsNode(0...32)(
+    [DefNode(0...32)(
+       (9...13),
+       SelfNode(4...8)(),
+       ParametersNode(14...17)(
+         [RequiredParameterNode(14...17)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(21...32)(
+         [CallNode(21...32)(
+            nil,
+            nil,
+            (21...27),
+            (27...28),
+            ArgumentsNode(28...31)([LocalVariableReadNode(28...31)(:cmd, 0)]),
+            (31...32),
+            nil,
+            0,
+            "system"
+          )]
+       ),
+       [:cmd],
+       (0...3),
+       (8...9),
+       (13...14),
+       (17...18),
+       (19...20),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_oneliner_eq2.txt b/test/yarp/snapshots/seattlerb/defs_oneliner_eq2.txt
new file mode 100644
index 0000000000..8a4f9e9086
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_oneliner_eq2.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [ClassNode(0...33)(
+       [],
+       (0...5),
+       ConstantReadNode(6...7)(),
+       nil,
+       nil,
+       StatementsNode(10...29)(
+         [DefNode(10...29)(
+            (19...21),
+            SelfNode(14...18)(),
+            ParametersNode(22...23)(
+              [RequiredParameterNode(22...23)(:o)],
+              [],
+              [],
+              nil,
+              [],
+              nil,
+              nil
+            ),
+            StatementsNode(27...29)([IntegerNode(27...29)()]),
+            [:o],
+            (10...13),
+            (18...19),
+            (21...22),
+            (23...24),
+            (25...26),
+            nil
+          )]
+       ),
+       (30...33)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/defs_oneliner_rescue.txt b/test/yarp/snapshots/seattlerb/defs_oneliner_rescue.txt
new file mode 100644
index 0000000000..90269cc14a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/defs_oneliner_rescue.txt
@@ -0,0 +1,132 @@
+ProgramNode(0...145)(
+  [],
+  StatementsNode(0...145)(
+    [DefNode(0...49)(
+       (9...13),
+       SelfNode(4...8)(),
+       ParametersNode(14...17)(
+         [RequiredParameterNode(14...17)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       BeginNode(21...49)(
+         nil,
+         StatementsNode(21...32)(
+           [CallNode(21...32)(
+              nil,
+              nil,
+              (21...27),
+              (27...28),
+              ArgumentsNode(28...31)(
+                [LocalVariableReadNode(28...31)(:cmd, 0)]
+              ),
+              (31...32),
+              nil,
+              0,
+              "system"
+            )]
+         ),
+         RescueNode(33...45)(
+           (33...39),
+           [],
+           nil,
+           nil,
+           StatementsNode(42...45)([NilNode(42...45)()]),
+           nil
+         ),
+         nil,
+         nil,
+         (46...49)
+       ),
+       [:cmd],
+       (0...3),
+       (8...9),
+       (13...14),
+       (17...18),
+       nil,
+       (46...49)
+     ),
+     DefNode(52...99)(
+       (61...65),
+       SelfNode(56...60)(),
+       ParametersNode(66...69)(
+         [RequiredParameterNode(66...69)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(73...95)(
+         [RescueModifierNode(73...95)(
+            CallNode(73...84)(
+              nil,
+              nil,
+              (73...79),
+              (79...80),
+              ArgumentsNode(80...83)(
+                [LocalVariableReadNode(80...83)(:cmd, 0)]
+              ),
+              (83...84),
+              nil,
+              0,
+              "system"
+            ),
+            (85...91),
+            NilNode(92...95)()
+          )]
+       ),
+       [:cmd],
+       (52...55),
+       (60...61),
+       (65...66),
+       (69...70),
+       nil,
+       (96...99)
+     ),
+     DefNode(102...145)(
+       (111...115),
+       SelfNode(106...110)(),
+       ParametersNode(116...119)(
+         [RequiredParameterNode(116...119)(:cmd)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(123...145)(
+         [RescueModifierNode(123...145)(
+            CallNode(123...134)(
+              nil,
+              nil,
+              (123...129),
+              (129...130),
+              ArgumentsNode(130...133)(
+                [LocalVariableReadNode(130...133)(:cmd, 0)]
+              ),
+              (133...134),
+              nil,
+              0,
+              "system"
+            ),
+            (135...141),
+            NilNode(142...145)()
+          )]
+       ),
+       [:cmd],
+       (102...105),
+       (110...111),
+       (115...116),
+       (119...120),
+       (121...122),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/do_bug.txt b/test/yarp/snapshots/seattlerb/do_bug.txt
new file mode 100644
index 0000000000..8226a3fa45
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/do_bug.txt
@@ -0,0 +1,46 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [CallNode(0...3)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...3)([IntegerNode(2...3)()]),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(4...33)(
+       CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "a"),
+       (5...6),
+       (6...7),
+       nil,
+       nil,
+       nil,
+       BlockNode(8...33)(
+         [:c],
+         BlockParametersNode(11...14)(
+           ParametersNode(12...13)(
+             [RequiredParameterNode(12...13)(:c)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (11...12),
+           (13...14)
+         ),
+         nil,
+         (8...10),
+         (30...33)
+       ),
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/do_lambda.txt b/test/yarp/snapshots/seattlerb/do_lambda.txt
new file mode 100644
index 0000000000..86b3548eb4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/do_lambda.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [LambdaNode(0...11)(
+       [],
+       (0...2),
+       BlockParametersNode(2...4)(nil, [], (2...3), (3...4)),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dot2_nil__26.txt b/test/yarp/snapshots/seattlerb/dot2_nil__26.txt
new file mode 100644
index 0000000000..2db1072701
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dot2_nil__26.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)(
+    [RangeNode(0...3)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (1...3),
+       0
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dot3_nil__26.txt b/test/yarp/snapshots/seattlerb/dot3_nil__26.txt
new file mode 100644
index 0000000000..fce5824c9d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dot3_nil__26.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [RangeNode(0...4)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (1...4),
+       1
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dstr_evstr.txt b/test/yarp/snapshots/seattlerb/dstr_evstr.txt
new file mode 100644
index 0000000000..c744aeee37
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dstr_evstr.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [InterpolatedStringNode(0...12)(
+       (0...1),
+       [EmbeddedStatementsNode(1...7)(
+          (1...3),
+          StatementsNode(3...6)(
+            [StringNode(3...6)((3...4), (4...5), (5...6), "a")]
+          ),
+          (6...7)
+        ),
+        EmbeddedStatementsNode(7...11)(
+          (7...9),
+          StatementsNode(9...10)(
+            [CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "b")]
+          ),
+          (10...11)
+        )],
+       (11...12)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dstr_evstr_empty_end.txt b/test/yarp/snapshots/seattlerb/dstr_evstr_empty_end.txt
new file mode 100644
index 0000000000..113270b9c0
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dstr_evstr_empty_end.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [InterpolatedSymbolNode(0...11)(
+       (0...2),
+       [EmbeddedStatementsNode(2...10)(
+          (2...4),
+          StatementsNode(4...9)(
+            [CallNode(4...9)(
+               nil,
+               nil,
+               (4...9),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "field"
+             )]
+          ),
+          (9...10)
+        )],
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dstr_lex_state.txt b/test/yarp/snapshots/seattlerb/dstr_lex_state.txt
new file mode 100644
index 0000000000..50e327ab9c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dstr_lex_state.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [InterpolatedStringNode(0...8)(
+       (0...1),
+       [EmbeddedStatementsNode(1...7)(
+          (1...3),
+          StatementsNode(3...6)(
+            [CallNode(3...6)(
+               nil,
+               nil,
+               (3...4),
+               nil,
+               ArgumentsNode(4...6)(
+                 [SymbolNode(4...6)((4...5), (5...6), nil, "a")]
+               ),
+               nil,
+               nil,
+               0,
+               "p"
+             )]
+          ),
+          (6...7)
+        )],
+       (7...8)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dstr_str.txt b/test/yarp/snapshots/seattlerb/dstr_str.txt
new file mode 100644
index 0000000000..e17b035d2f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dstr_str.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [InterpolatedStringNode(0...10)(
+       (0...1),
+       [EmbeddedStatementsNode(1...7)(
+          (1...3),
+          StatementsNode(3...6)(
+            [StringNode(3...6)((3...4), (4...5), (5...6), "a")]
+          ),
+          (6...7)
+        ),
+        StringNode(7...9)(nil, (7...9), nil, " b")],
+       (9...10)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dsym_esc_to_sym.txt b/test/yarp/snapshots/seattlerb/dsym_esc_to_sym.txt
new file mode 100644
index 0000000000..41a66c6143
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dsym_esc_to_sym.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [InterpolatedSymbolNode(0...17)(
+       (0...2),
+       [StringNode(2...16)(nil, (2...16), nil, "Varietà")],
+       (16...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/dsym_to_sym.txt b/test/yarp/snapshots/seattlerb/dsym_to_sym.txt
new file mode 100644
index 0000000000..67c71efb2d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/dsym_to_sym.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...32)(
+  [],
+  StatementsNode(0...32)(
+    [AliasNode(0...17)(
+       InterpolatedSymbolNode(6...11)(
+         (6...8),
+         [StringNode(8...10)(nil, (8...10), nil, "<<")],
+         (10...11)
+       ),
+       InterpolatedSymbolNode(12...17)(
+         (12...14),
+         [StringNode(14...16)(nil, (14...16), nil, ">>")],
+         (16...17)
+       ),
+       (0...5)
+     ),
+     AliasNode(19...32)(
+       SymbolNode(25...28)((25...26), (26...28), nil, "<<"),
+       SymbolNode(29...32)((29...30), (30...32), nil, ">>"),
+       (19...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/eq_begin_line_numbers.txt b/test/yarp/snapshots/seattlerb/eq_begin_line_numbers.txt
new file mode 100644
index 0000000000..46a167a8de
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/eq_begin_line_numbers.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)([IntegerNode(0...1)(), IntegerNode(30...31)()])
+)
diff --git a/test/yarp/snapshots/seattlerb/eq_begin_why_wont_people_use_their_spacebar.txt b/test/yarp/snapshots/seattlerb/eq_begin_why_wont_people_use_their_spacebar.txt
new file mode 100644
index 0000000000..805f6f9bd0
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/eq_begin_why_wont_people_use_their_spacebar.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [CallNode(0...29)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "h"),
+       nil,
+       (1...4),
+       (1...2),
+       ArgumentsNode(2...29)(
+         [CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "k"),
+          BeginNode(5...29)(
+            (5...10),
+            StatementsNode(18...20)([IntegerNode(18...20)()]),
+            nil,
+            nil,
+            nil,
+            (26...29)
+          )]
+       ),
+       (3...4),
+       nil,
+       0,
+       "[]="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/evstr_evstr.txt b/test/yarp/snapshots/seattlerb/evstr_evstr.txt
new file mode 100644
index 0000000000..e4b49cb84d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/evstr_evstr.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [InterpolatedStringNode(0...10)(
+       (0...1),
+       [EmbeddedStatementsNode(1...5)(
+          (1...3),
+          StatementsNode(3...4)(
+            [CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "a")]
+          ),
+          (4...5)
+        ),
+        EmbeddedStatementsNode(5...9)(
+          (5...7),
+          StatementsNode(7...8)(
+            [CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "b")]
+          ),
+          (8...9)
+        )],
+       (9...10)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/evstr_str.txt b/test/yarp/snapshots/seattlerb/evstr_str.txt
new file mode 100644
index 0000000000..4571199189
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/evstr_str.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [InterpolatedStringNode(0...8)(
+       (0...1),
+       [EmbeddedStatementsNode(1...5)(
+          (1...3),
+          StatementsNode(3...4)(
+            [CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "a")]
+          ),
+          (4...5)
+        ),
+        StringNode(5...7)(nil, (5...7), nil, " b")],
+       (7...8)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/expr_not_bang.txt b/test/yarp/snapshots/seattlerb/expr_not_bang.txt
new file mode 100644
index 0000000000..ed1649eff8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/expr_not_bang.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       CallNode(2...5)(
+         nil,
+         nil,
+         (2...3),
+         nil,
+         ArgumentsNode(4...5)(
+           [CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil,
+         nil,
+         0,
+         "a"
+       ),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/f_kw.txt b/test/yarp/snapshots/seattlerb/f_kw.txt
new file mode 100644
index 0000000000..ace0997f9e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/f_kw.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [DefNode(0...15)(
+       (4...5),
+       nil,
+       ParametersNode(6...10)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...10)((6...8), IntegerNode(8...10)())],
+         nil,
+         nil
+       ),
+       nil,
+       [:k],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (12...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/f_kw__required.txt b/test/yarp/snapshots/seattlerb/f_kw__required.txt
new file mode 100644
index 0000000000..38d564599f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/f_kw__required.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [DefNode(0...13)(
+       (4...5),
+       nil,
+       ParametersNode(6...8)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...8)((6...8), nil)],
+         nil,
+         nil
+       ),
+       nil,
+       [:k],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (10...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/flip2_env_lvar.txt b/test/yarp/snapshots/seattlerb/flip2_env_lvar.txt
new file mode 100644
index 0000000000..623be4987e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/flip2_env_lvar.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [IfNode(0...16)(
+       (0...2),
+       RangeNode(3...7)(
+         CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "a"),
+         CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b"),
+         (4...6),
+         0
+       ),
+       nil,
+       nil,
+       (13...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/float_with_if_modifier.txt b/test/yarp/snapshots/seattlerb/float_with_if_modifier.txt
new file mode 100644
index 0000000000..c27a5bfe3b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/float_with_if_modifier.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [IfNode(0...10)(
+       (3...5),
+       TrueNode(6...10)(),
+       StatementsNode(0...3)([FloatNode(0...3)()]),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc__backslash_dos_format.txt b/test/yarp/snapshots/seattlerb/heredoc__backslash_dos_format.txt
new file mode 100644
index 0000000000..36bb254c51
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc__backslash_dos_format.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...35)(
+  [:str],
+  StatementsNode(0...35)(
+    [LocalVariableWriteNode(0...35)(
+       :str,
+       0,
+       InterpolatedStringNode(6...35)(
+         (6...12),
+         [StringNode(14...30)(
+            nil,
+            (14...30),
+            nil,
+            "before\u0000\u0000after\r\n"
+          )],
+         (30...35)
+       ),
+       (0...3),
+       (4...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_backslash_nl.txt b/test/yarp/snapshots/seattlerb/heredoc_backslash_nl.txt
new file mode 100644
index 0000000000..36a074222b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_backslash_nl.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...93)(
+  [],
+  StatementsNode(0...93)(
+    [StringNode(0...40)(
+       (0...1),
+       (1...39),
+       (39...40),
+       "  why would someone do this? \n" + "  blah\n"
+     ),
+     InterpolatedStringNode(42...93)(
+       (42...49),
+       [StringNode(50...88)(
+          nil,
+          (50...88),
+          nil,
+          "  why would someone do this? \n" + "  blah\n"
+        )],
+       (88...93)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_bad_hex_escape.txt b/test/yarp/snapshots/seattlerb/heredoc_bad_hex_escape.txt
new file mode 100644
index 0000000000..1917020fbd
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_bad_hex_escape.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...21)(
+  [:s],
+  StatementsNode(0...21)(
+    [LocalVariableWriteNode(0...21)(
+       :s,
+       0,
+       InterpolatedStringNode(4...21)(
+         (4...9),
+         [StringNode(10...17)(nil, (10...17), nil, "a\xE9b\n")],
+         (17...21)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_bad_oct_escape.txt b/test/yarp/snapshots/seattlerb/heredoc_bad_oct_escape.txt
new file mode 100644
index 0000000000..69776e0145
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_bad_oct_escape.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...27)(
+  [:s],
+  StatementsNode(0...27)(
+    [LocalVariableWriteNode(0...27)(
+       :s,
+       0,
+       InterpolatedStringNode(4...27)(
+         (4...10),
+         [StringNode(11...23)(nil, (11...23), nil, "a\xA7b\n" + "cöd\n")],
+         (23...27)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_comma_arg.txt b/test/yarp/snapshots/seattlerb/heredoc_comma_arg.txt
new file mode 100644
index 0000000000..98cc3184e1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_comma_arg.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...47)(
+  [],
+  StatementsNode(0...47)(
+    [ArrayNode(0...17)(
+       [StringNode(1...15)((1...2), (2...14), (14...15), "  some text\n")],
+       (0...1),
+       (16...17)
+     ),
+     ArrayNode(19...47)(
+       [InterpolatedStringNode(20...46)(
+          (20...27),
+          [StringNode(29...41)(nil, (29...41), nil, "  some text\n")],
+          (41...46)
+        )],
+       (19...20),
+       (46...47)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_lineno.txt b/test/yarp/snapshots/seattlerb/heredoc_lineno.txt
new file mode 100644
index 0000000000..e0a8f91a13
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_lineno.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...41)(
+  [:c, :d],
+  StatementsNode(0...41)(
+    [LocalVariableWriteNode(0...34)(
+       :c,
+       0,
+       InterpolatedStringNode(4...34)(
+         (4...11),
+         [StringNode(12...30)(
+            nil,
+            (12...30),
+            nil,
+            "line2\n" + "line3\n" + "line4\n"
+          )],
+         (30...34)
+       ),
+       (0...1),
+       (2...3)
+     ),
+     LocalVariableWriteNode(35...41)(
+       :d,
+       0,
+       IntegerNode(39...41)(),
+       (35...36),
+       (37...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly.txt
new file mode 100644
index 0000000000..75c1d49310
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...31)(
+  [:a],
+  StatementsNode(0...31)(
+    [LocalVariableWriteNode(0...31)(
+       :a,
+       0,
+       InterpolatedStringNode(4...31)(
+         (4...12),
+         [StringNode(13...25)(nil, (13...25), nil, "x\n" + "y\n" + "z\n")],
+         (25...31)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_blank_line_plus_interpolation.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_blank_line_plus_interpolation.txt
new file mode 100644
index 0000000000..92628b3471
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_blank_line_plus_interpolation.txt
@@ -0,0 +1,56 @@
+ProgramNode(0...20)(
+  [:a],
+  StatementsNode(0...20)(
+    [LocalVariableWriteNode(0...20)(
+       :a,
+       0,
+       CallNode(4...20)(
+         nil,
+         nil,
+         (4...7),
+         (7...8),
+         ArgumentsNode(8...19)(
+           [CallNode(8...19)(
+              InterpolatedStringNode(8...42)(
+                (8...14),
+                [StringNode(21...26)(nil, (21...26), nil, "\n"),
+                 EmbeddedStatementsNode(26...32)(
+                   (26...28),
+                   StatementsNode(28...31)(
+                     [CallNode(28...31)(
+                        nil,
+                        nil,
+                        (28...31),
+                        nil,
+                        nil,
+                        nil,
+                        nil,
+                        0,
+                        "bar"
+                      )]
+                   ),
+                   (31...32)
+                 ),
+                 StringNode(32...36)(nil, (32...36), nil, "baz\n")],
+                (36...42)
+              ),
+              (14...15),
+              (15...19),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "chop"
+            )]
+         ),
+         (19...20),
+         nil,
+         0,
+         "foo"
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_blank_lines.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_blank_lines.txt
new file mode 100644
index 0000000000..895a03d219
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_blank_lines.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...24)(
+  [:a],
+  StatementsNode(0...24)(
+    [LocalVariableWriteNode(0...24)(
+       :a,
+       0,
+       InterpolatedStringNode(4...24)(
+         (4...10),
+         [StringNode(11...20)(nil, (11...20), nil, "x\n" + "\n" + "z\n")],
+         (20...24)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_empty.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_empty.txt
new file mode 100644
index 0000000000..8de32879f3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_empty.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)([InterpolatedStringNode(0...7)((0...4), [], (5...7))])
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_interp.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_interp.txt
new file mode 100644
index 0000000000..6d99151e70
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_interp.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...42)(
+  [:a],
+  StatementsNode(0...42)(
+    [LocalVariableWriteNode(0...42)(
+       :a,
+       0,
+       InterpolatedStringNode(4...42)(
+         (4...10),
+         [StringNode(11...22)(nil, (11...22), nil, "    w\n" + "x"),
+          EmbeddedStatementsNode(22...27)(
+            (22...24),
+            StatementsNode(24...26)([IntegerNode(24...26)()]),
+            (26...27)
+          ),
+          StringNode(27...36)(nil, (27...36), nil, " y\n" + "  z\n")],
+         (36...42)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_no_indent.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_no_indent.txt
new file mode 100644
index 0000000000..38fd30f6e2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_no_indent.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [InterpolatedStringNode(0...9)(
+       (0...4),
+       [StringNode(5...7)(nil, (5...7), nil, "a\n")],
+       (7...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_tabs.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_tabs.txt
new file mode 100644
index 0000000000..0e18753a1c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_tabs.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...49)(
+  [:a],
+  StatementsNode(0...49)(
+    [LocalVariableWriteNode(0...49)(
+       :a,
+       0,
+       InterpolatedStringNode(4...49)(
+         (4...12),
+         [StringNode(13...43)(
+            nil,
+            (13...43),
+            nil,
+            "blah blah\n" + " blah blah\n"
+          )],
+         (43...49)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_tabs_extra.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_tabs_extra.txt
new file mode 100644
index 0000000000..2199b41826
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_tabs_extra.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...43)(
+  [:a],
+  StatementsNode(0...43)(
+    [LocalVariableWriteNode(0...43)(
+       :a,
+       0,
+       InterpolatedStringNode(4...43)(
+         (4...12),
+         [StringNode(13...37)(
+            nil,
+            (13...37),
+            nil,
+            "blah blah\n" + "\tblah blah\n"
+          )],
+         (37...43)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_squiggly_visually_blank_lines.txt b/test/yarp/snapshots/seattlerb/heredoc_squiggly_visually_blank_lines.txt
new file mode 100644
index 0000000000..895a03d219
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_squiggly_visually_blank_lines.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...24)(
+  [:a],
+  StatementsNode(0...24)(
+    [LocalVariableWriteNode(0...24)(
+       :a,
+       0,
+       InterpolatedStringNode(4...24)(
+         (4...10),
+         [StringNode(11...20)(nil, (11...20), nil, "x\n" + "\n" + "z\n")],
+         (20...24)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_trailing_slash_continued_call.txt b/test/yarp/snapshots/seattlerb/heredoc_trailing_slash_continued_call.txt
new file mode 100644
index 0000000000..2ec330b49e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_trailing_slash_continued_call.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       InterpolatedStringNode(0...16)(
+         (0...5),
+         [StringNode(7...12)(nil, (7...12), nil, "blah\n")],
+         (12...16)
+       ),
+       (16...17),
+       (17...22),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "strip"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_unicode.txt b/test/yarp/snapshots/seattlerb/heredoc_unicode.txt
new file mode 100644
index 0000000000..3f0b096d94
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_unicode.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [InterpolatedStringNode(0...20)(
+       (0...9),
+       [StringNode(10...12)(nil, (10...12), nil, ".\n")],
+       (12...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_carriage_return_escapes.txt b/test/yarp/snapshots/seattlerb/heredoc_with_carriage_return_escapes.txt
new file mode 100644
index 0000000000..24d7f88cff
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_carriage_return_escapes.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [InterpolatedStringNode(0...25)(
+       (0...5),
+       [StringNode(6...21)(nil, (6...21), nil, "foo\rbar\n" + "baz\r\n")],
+       (21...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_carriage_return_escapes_windows.txt b/test/yarp/snapshots/seattlerb/heredoc_with_carriage_return_escapes_windows.txt
new file mode 100644
index 0000000000..6ac06a3730
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_carriage_return_escapes_windows.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [InterpolatedStringNode(0...29)(
+       (0...5),
+       [StringNode(7...24)(nil, (7...24), nil, "foo\rbar\r\n" + "baz\r\r\n")],
+       (24...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_horrible_mix.txt b/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_horrible_mix.txt
new file mode 100644
index 0000000000..fcf6267807
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_horrible_mix.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [InterpolatedStringNode(0...19)(
+       (0...7),
+       [StringNode(9...15)(nil, (9...15), nil, "body\r\n")],
+       (15...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_returns.txt b/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_returns.txt
new file mode 100644
index 0000000000..3c538e92d1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_returns.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [InterpolatedStringNode(0...23)(
+       (0...5),
+       [StringNode(6...19)(nil, (6...19), nil, "foo\rbar\r\n" + "baz\n")],
+       (19...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_returns_windows.txt b/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_returns_windows.txt
new file mode 100644
index 0000000000..5ef9682601
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_extra_carriage_returns_windows.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [InterpolatedStringNode(0...27)(
+       (0...5),
+       [StringNode(7...22)(nil, (7...22), nil, "foo\rbar\r\r\n" + "baz\r\n")],
+       (22...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes.txt b/test/yarp/snapshots/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes.txt
new file mode 100644
index 0000000000..57cd5f75df
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [InterpolatedStringNode(0...21)(
+       (0...5),
+       [StringNode(6...11)(nil, (6...11), nil, "foo\r"),
+        EmbeddedVariableNode(11...16)(
+          (11...12),
+          InstanceVariableReadNode(12...16)()
+        ),
+        StringNode(16...17)(nil, (16...17), nil, "\n")],
+       (17...21)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes_windows.txt b/test/yarp/snapshots/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes_windows.txt
new file mode 100644
index 0000000000..6cc4d8ad45
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_interpolation_and_carriage_return_escapes_windows.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [InterpolatedStringNode(0...24)(
+       (0...5),
+       [StringNode(7...12)(nil, (7...12), nil, "foo\r"),
+        EmbeddedVariableNode(12...17)(
+          (12...13),
+          InstanceVariableReadNode(13...17)()
+        ),
+        StringNode(17...19)(nil, (17...19), nil, "\r\n")],
+       (19...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_not_global_interpolation.txt b/test/yarp/snapshots/seattlerb/heredoc_with_not_global_interpolation.txt
new file mode 100644
index 0000000000..3ea8c05892
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_not_global_interpolation.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [InterpolatedStringNode(0...23)(
+       (0...10),
+       [StringNode(11...15)(nil, (11...15), nil, "\#${\n")],
+       (15...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_only_carriage_returns.txt b/test/yarp/snapshots/seattlerb/heredoc_with_only_carriage_returns.txt
new file mode 100644
index 0000000000..d3c5c52655
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_only_carriage_returns.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [InterpolatedStringNode(0...18)(
+       (0...5),
+       [StringNode(6...14)(nil, (6...14), nil, "\r\n" + "\r\r\n" + "\r\n")],
+       (14...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_with_only_carriage_returns_windows.txt b/test/yarp/snapshots/seattlerb/heredoc_with_only_carriage_returns_windows.txt
new file mode 100644
index 0000000000..c38bebfd07
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_with_only_carriage_returns_windows.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [InterpolatedStringNode(0...23)(
+       (0...5),
+       [StringNode(7...18)(
+          nil,
+          (7...18),
+          nil,
+          "\r\r\n" + "\r\r\r\n" + "\r\r\n"
+        )],
+       (18...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/heredoc_wtf_I_hate_you.txt b/test/yarp/snapshots/seattlerb/heredoc_wtf_I_hate_you.txt
new file mode 100644
index 0000000000..9547fe7657
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/heredoc_wtf_I_hate_you.txt
@@ -0,0 +1,51 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [CallNode(0...30)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...30)(
+         [CallNode(2...30)(
+            CallNode(2...26)(
+              InterpolatedStringNode(2...22)(
+                (2...8),
+                [StringNode(12...16)(nil, (12...16), nil, "  a\n")],
+                (16...22)
+              ),
+              nil,
+              (8...9),
+              nil,
+              ArgumentsNode(9...26)(
+                [InterpolatedStringNode(9...26)(
+                   (9...10),
+                   [StringNode(10...12)(nil, (10...12), nil, "b\n"),
+                    StringNode(22...25)(nil, (22...25), nil, "  c")],
+                   (25...26)
+                 )]
+              ),
+              nil,
+              nil,
+              0,
+              "+"
+            ),
+            nil,
+            (26...27),
+            nil,
+            ArgumentsNode(27...30)(
+              [StringNode(27...30)((27...28), (28...29), (29...30), "d")]
+            ),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/i_fucking_hate_line_numbers.txt b/test/yarp/snapshots/seattlerb/i_fucking_hate_line_numbers.txt
new file mode 100644
index 0000000000..100e56df89
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/i_fucking_hate_line_numbers.txt
@@ -0,0 +1,131 @@
+ProgramNode(0...104)(
+  [],
+  StatementsNode(0...104)(
+    [IfNode(0...104)(
+       (0...2),
+       TrueNode(3...7)(),
+       StatementsNode(10...100)(
+         [CallNode(10...13)(
+            nil,
+            nil,
+            (10...11),
+            nil,
+            ArgumentsNode(12...13)([IntegerNode(12...13)()]),
+            nil,
+            nil,
+            0,
+            "p"
+          ),
+          CallNode(16...21)(
+            CallNode(16...17)(nil, nil, (16...17), nil, nil, nil, nil, 0, "a"),
+            (17...18),
+            (18...19),
+            nil,
+            ArgumentsNode(20...21)([IntegerNode(20...21)()]),
+            nil,
+            nil,
+            0,
+            "b"
+          ),
+          CallNode(24...32)(
+            CallNode(24...25)(nil, nil, (24...25), nil, nil, nil, nil, 0, "c"),
+            (25...26),
+            (26...27),
+            nil,
+            ArgumentsNode(28...32)(
+              [IntegerNode(28...29)(), IntegerNode(31...32)()]
+            ),
+            nil,
+            nil,
+            0,
+            "d"
+          ),
+          CallNode(35...40)(
+            CallNode(35...36)(nil, nil, (35...36), nil, nil, nil, nil, 0, "e"),
+            (36...37),
+            (37...38),
+            nil,
+            ArgumentsNode(39...40)([IntegerNode(39...40)()]),
+            nil,
+            nil,
+            0,
+            "f"
+          ),
+          CallNode(43...51)(
+            CallNode(43...44)(nil, nil, (43...44), nil, nil, nil, nil, 0, "g"),
+            (44...45),
+            (45...46),
+            nil,
+            ArgumentsNode(47...51)(
+              [IntegerNode(47...48)(), IntegerNode(50...51)()]
+            ),
+            nil,
+            nil,
+            0,
+            "h"
+          ),
+          CallNode(54...58)(
+            nil,
+            nil,
+            (54...55),
+            (55...56),
+            ArgumentsNode(56...57)([IntegerNode(56...57)()]),
+            (57...58),
+            nil,
+            0,
+            "p"
+          ),
+          CallNode(61...67)(
+            CallNode(61...62)(nil, nil, (61...62), nil, nil, nil, nil, 0, "a"),
+            (62...63),
+            (63...64),
+            (64...65),
+            ArgumentsNode(65...66)([IntegerNode(65...66)()]),
+            (66...67),
+            nil,
+            0,
+            "b"
+          ),
+          CallNode(70...79)(
+            CallNode(70...71)(nil, nil, (70...71), nil, nil, nil, nil, 0, "c"),
+            (71...72),
+            (72...73),
+            (73...74),
+            ArgumentsNode(74...78)(
+              [IntegerNode(74...75)(), IntegerNode(77...78)()]
+            ),
+            (78...79),
+            nil,
+            0,
+            "d"
+          ),
+          CallNode(82...88)(
+            CallNode(82...83)(nil, nil, (82...83), nil, nil, nil, nil, 0, "e"),
+            (83...84),
+            (84...85),
+            (85...86),
+            ArgumentsNode(86...87)([IntegerNode(86...87)()]),
+            (87...88),
+            nil,
+            0,
+            "f"
+          ),
+          CallNode(91...100)(
+            CallNode(91...92)(nil, nil, (91...92), nil, nil, nil, nil, 0, "g"),
+            (92...93),
+            (93...94),
+            (94...95),
+            ArgumentsNode(95...99)(
+              [IntegerNode(95...96)(), IntegerNode(98...99)()]
+            ),
+            (99...100),
+            nil,
+            0,
+            "h"
+          )]
+       ),
+       nil,
+       (101...104)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/i_fucking_hate_line_numbers2.txt b/test/yarp/snapshots/seattlerb/i_fucking_hate_line_numbers2.txt
new file mode 100644
index 0000000000..49bb711232
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/i_fucking_hate_line_numbers2.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...48)(
+  [:b, :c],
+  StatementsNode(0...48)(
+    [IfNode(0...46)(
+       (0...2),
+       TrueNode(3...7)(),
+       StatementsNode(15...42)(
+         [CallNode(15...21)(
+            nil,
+            nil,
+            (15...16),
+            (16...17),
+            ArgumentsNode(17...20)(
+              [StringNode(17...20)((17...18), (18...19), (19...20), "a")]
+            ),
+            (20...21),
+            nil,
+            0,
+            "p"
+          ),
+          LocalVariableWriteNode(24...29)(
+            :b,
+            0,
+            IntegerNode(28...29)(),
+            (24...25),
+            (26...27)
+          ),
+          CallNode(32...35)(
+            nil,
+            nil,
+            (32...33),
+            nil,
+            ArgumentsNode(34...35)([LocalVariableReadNode(34...35)(:b, 0)]),
+            nil,
+            nil,
+            0,
+            "p"
+          ),
+          LocalVariableWriteNode(38...42)(
+            :c,
+            0,
+            IntegerNode(41...42)(),
+            (38...39),
+            (40...41)
+          )]
+       ),
+       nil,
+       (43...46)
+     ),
+     CallNode(47...48)(nil, nil, (47...48), nil, nil, nil, nil, 0, "a")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/i_have_no_freakin_clue.txt b/test/yarp/snapshots/seattlerb/i_have_no_freakin_clue.txt
new file mode 100644
index 0000000000..78772ca20d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/i_have_no_freakin_clue.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [IfNode(0...13)(
+       nil,
+       IntegerNode(0...1)(),
+       StatementsNode(4...9)(
+         [CallNode(4...9)(
+            nil,
+            nil,
+            (4...5),
+            (5...6),
+            ArgumentsNode(6...8)(
+              [StringNode(6...8)((6...7), (7...7), (7...8), "")]
+            ),
+            (8...9),
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       ElseNode(10...13)(
+         (10...11),
+         StatementsNode(12...13)([IntegerNode(12...13)()]),
+         nil
+       ),
+       nil
+     ),
+     CallNode(14...20)(
+       nil,
+       nil,
+       (14...15),
+       nil,
+       ArgumentsNode(16...20)(
+         [KeywordHashNode(16...20)(
+            [AssocNode(16...20)(
+               SymbolNode(16...18)(nil, (16...17), (17...18), "d"),
+               IntegerNode(19...20)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/if_elsif.txt b/test/yarp/snapshots/seattlerb/if_elsif.txt
new file mode 100644
index 0000000000..6f1edfb62e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/if_elsif.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [IfNode(0...18)(
+       (0...2),
+       IntegerNode(3...4)(),
+       nil,
+       IfNode(6...13)((6...11), IntegerNode(12...13)(), nil, nil, nil),
+       (15...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/if_symbol.txt b/test/yarp/snapshots/seattlerb/if_symbol.txt
new file mode 100644
index 0000000000..4e4fdcefce
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/if_symbol.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [IfNode(0...12)(
+       (0...2),
+       CallNode(3...7)(
+         nil,
+         nil,
+         (3...4),
+         nil,
+         ArgumentsNode(5...7)([SymbolNode(5...7)((5...6), (6...7), nil, "x")]),
+         nil,
+         nil,
+         0,
+         "f"
+       ),
+       nil,
+       nil,
+       (9...12)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/in_expr_no_case.txt b/test/yarp/snapshots/seattlerb/in_expr_no_case.txt
new file mode 100644
index 0000000000..093b2a65f8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/in_expr_no_case.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [MatchPredicateNode(0...16)(
+       StringNode(0...6)((0...1), (1...5), (5...6), "woot"),
+       ConstantReadNode(10...16)(),
+       (7...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/index_0.txt b/test/yarp/snapshots/seattlerb/index_0.txt
new file mode 100644
index 0000000000..7e2d6f980f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/index_0.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (1...3),
+       (1...2),
+       ArgumentsNode(6...7)(
+         [CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b")]
+       ),
+       (2...3),
+       nil,
+       0,
+       "[]="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/index_0_opasgn.txt b/test/yarp/snapshots/seattlerb/index_0_opasgn.txt
new file mode 100644
index 0000000000..3271bfa598
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/index_0_opasgn.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallOperatorWriteNode(0...8)(
+       CallNode(0...3)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         nil,
+         (1...3),
+         (1...2),
+         nil,
+         (2...3),
+         nil,
+         0,
+         "[]="
+       ),
+       (4...6),
+       CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "b"),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/integer_with_if_modifier.txt b/test/yarp/snapshots/seattlerb/integer_with_if_modifier.txt
new file mode 100644
index 0000000000..f57ed6c422
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/integer_with_if_modifier.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [IfNode(0...12)(
+       (5...7),
+       TrueNode(8...12)(),
+       StatementsNode(0...5)([IntegerNode(0...5)()]),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/interpolated_symbol_array_line_breaks.txt b/test/yarp/snapshots/seattlerb/interpolated_symbol_array_line_breaks.txt
new file mode 100644
index 0000000000..0a779610a6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/interpolated_symbol_array_line_breaks.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...9)(
+       [SymbolNode(4...5)(nil, (4...5), nil, "a"),
+        SymbolNode(6...7)(nil, (6...7), nil, "b")],
+       (0...3),
+       (8...9)
+     ),
+     IntegerNode(10...11)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/interpolated_word_array_line_breaks.txt b/test/yarp/snapshots/seattlerb/interpolated_word_array_line_breaks.txt
new file mode 100644
index 0000000000..901575f9a8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/interpolated_word_array_line_breaks.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...9)(
+       [StringNode(4...5)(nil, (4...5), nil, "a"),
+        StringNode(6...7)(nil, (6...7), nil, "b")],
+       (0...3),
+       (8...9)
+     ),
+     IntegerNode(10...11)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_1.txt b/test/yarp/snapshots/seattlerb/iter_args_1.txt
new file mode 100644
index 0000000000..9fdbf68818
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_1.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...11)(
+         [:a, :b],
+         BlockParametersNode(4...9)(
+           ParametersNode(5...8)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredParameterNode(7...8)(:b)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (8...9)
+         ),
+         nil,
+         (2...3),
+         (10...11)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_10_1.txt b/test/yarp/snapshots/seattlerb/iter_args_10_1.txt
new file mode 100644
index 0000000000..5da1b5260a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_10_1.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [CallNode(0...21)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...21)(
+         [:a, :b, :c],
+         BlockParametersNode(4...19)(
+           ParametersNode(5...18)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              )],
+             [],
+             RestParameterNode(16...18)((16...17), (17...18)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (18...19)
+         ),
+         nil,
+         (2...3),
+         (20...21)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_10_2.txt b/test/yarp/snapshots/seattlerb/iter_args_10_2.txt
new file mode 100644
index 0000000000..5059820edc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_10_2.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CallNode(0...25)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...25)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...23)(
+           ParametersNode(5...22)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              )],
+             [],
+             RestParameterNode(16...18)((16...17), (17...18)),
+             [],
+             nil,
+             BlockParameterNode(20...22)((21...22), (20...21))
+           ),
+           [],
+           (4...5),
+           (22...23)
+         ),
+         nil,
+         (2...3),
+         (24...25)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_11_1.txt b/test/yarp/snapshots/seattlerb/iter_args_11_1.txt
new file mode 100644
index 0000000000..83f48569dc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_11_1.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [CallNode(0...24)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...24)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...22)(
+           ParametersNode(5...21)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              )],
+             [RequiredParameterNode(20...21)(:d)],
+             RestParameterNode(16...18)((16...17), (17...18)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (21...22)
+         ),
+         nil,
+         (2...3),
+         (23...24)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_11_2.txt b/test/yarp/snapshots/seattlerb/iter_args_11_2.txt
new file mode 100644
index 0000000000..b14ca29440
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_11_2.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallNode(0...28)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...28)(
+         [:a, :b, :c, :d, :e],
+         BlockParametersNode(4...26)(
+           ParametersNode(5...25)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...14)(
+                :b,
+                (8...9),
+                (10...11),
+                IntegerNode(12...14)()
+              )],
+             [RequiredParameterNode(20...21)(:d)],
+             RestParameterNode(16...18)((16...17), (17...18)),
+             [],
+             nil,
+             BlockParameterNode(23...25)((24...25), (23...24))
+           ),
+           [],
+           (4...5),
+           (25...26)
+         ),
+         nil,
+         (2...3),
+         (27...28)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_2__19.txt b/test/yarp/snapshots/seattlerb/iter_args_2__19.txt
new file mode 100644
index 0000000000..e9e94d3d6e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_2__19.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:a, :b],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [RequiredDestructuredParameterNode(5...11)(
+                [RequiredParameterNode(6...7)(:a),
+                 RequiredParameterNode(9...10)(:b)],
+                (5...6),
+                (10...11)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_3.txt b/test/yarp/snapshots/seattlerb/iter_args_3.txt
new file mode 100644
index 0000000000..8d191cc2e5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_3.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [CallNode(0...20)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...20)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...18)(
+           ParametersNode(5...17)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...14)(
+                [RequiredParameterNode(9...10)(:b),
+                 RequiredParameterNode(12...13)(:c)],
+                (8...9),
+                (13...14)
+              ),
+              RequiredParameterNode(16...17)(:d)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (17...18)
+         ),
+         nil,
+         (2...3),
+         (19...20)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_4.txt b/test/yarp/snapshots/seattlerb/iter_args_4.txt
new file mode 100644
index 0000000000..eaa140a522
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_4.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...16)(
+         [:a, :b, :c],
+         BlockParametersNode(4...14)(
+           ParametersNode(5...13)(
+             [RequiredParameterNode(5...6)(:a)],
+             [],
+             [RequiredParameterNode(12...13)(:c)],
+             RestParameterNode(8...10)((8...9), (9...10)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (13...14)
+         ),
+         nil,
+         (2...3),
+         (15...16)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_5.txt b/test/yarp/snapshots/seattlerb/iter_args_5.txt
new file mode 100644
index 0000000000..826ec62097
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_5.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...13)(
+         [:a, :b],
+         BlockParametersNode(4...11)(
+           ParametersNode(5...10)(
+             [RequiredParameterNode(5...6)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(8...10)((9...10), (8...9))
+           ),
+           [],
+           (4...5),
+           (10...11)
+         ),
+         nil,
+         (2...3),
+         (12...13)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_6.txt b/test/yarp/snapshots/seattlerb/iter_args_6.txt
new file mode 100644
index 0000000000..8a69456b62
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_6.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:a, :b, :c],
+         BlockParametersNode(4...16)(
+           ParametersNode(5...15)(
+             [RequiredParameterNode(5...6)(:a)],
+             [OptionalParameterNode(8...12)(
+                :b,
+                (8...9),
+                (9...10),
+                IntegerNode(10...12)()
+              )],
+             [RequiredParameterNode(14...15)(:c)],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_7_1.txt b/test/yarp/snapshots/seattlerb/iter_args_7_1.txt
new file mode 100644
index 0000000000..ad285d8cad
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_7_1.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:a, :b],
+         BlockParametersNode(4...16)(
+           ParametersNode(5...15)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :a,
+                (5...6),
+                (7...8),
+                IntegerNode(9...11)()
+              )],
+             [],
+             RestParameterNode(13...15)((13...14), (14...15)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_7_2.txt b/test/yarp/snapshots/seattlerb/iter_args_7_2.txt
new file mode 100644
index 0000000000..c151325c93
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_7_2.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...22)(
+         [:a, :b, :c],
+         BlockParametersNode(4...20)(
+           ParametersNode(5...19)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :a,
+                (5...6),
+                (7...8),
+                IntegerNode(9...11)()
+              )],
+             [],
+             RestParameterNode(13...15)((13...14), (14...15)),
+             [],
+             nil,
+             BlockParameterNode(17...19)((18...19), (17...18))
+           ),
+           [],
+           (4...5),
+           (19...20)
+         ),
+         nil,
+         (2...3),
+         (21...22)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_8_1.txt b/test/yarp/snapshots/seattlerb/iter_args_8_1.txt
new file mode 100644
index 0000000000..1a4ed0f599
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_8_1.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [CallNode(0...21)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...21)(
+         [:a, :b, :c],
+         BlockParametersNode(4...19)(
+           ParametersNode(5...18)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :a,
+                (5...6),
+                (7...8),
+                IntegerNode(9...11)()
+              )],
+             [RequiredParameterNode(17...18)(:c)],
+             RestParameterNode(13...15)((13...14), (14...15)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (18...19)
+         ),
+         nil,
+         (2...3),
+         (20...21)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_8_2.txt b/test/yarp/snapshots/seattlerb/iter_args_8_2.txt
new file mode 100644
index 0000000000..84b0ae8e65
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_8_2.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CallNode(0...25)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...25)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...23)(
+           ParametersNode(5...22)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :a,
+                (5...6),
+                (7...8),
+                IntegerNode(9...11)()
+              )],
+             [RequiredParameterNode(17...18)(:c)],
+             RestParameterNode(13...15)((13...14), (14...15)),
+             [],
+             nil,
+             BlockParameterNode(20...22)((21...22), (20...21))
+           ),
+           [],
+           (4...5),
+           (22...23)
+         ),
+         nil,
+         (2...3),
+         (24...25)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_9_1.txt b/test/yarp/snapshots/seattlerb/iter_args_9_1.txt
new file mode 100644
index 0000000000..68d1fe9338
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_9_1.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:a, :b],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :a,
+                (5...6),
+                (7...8),
+                IntegerNode(9...11)()
+              )],
+             [RequiredParameterNode(13...14)(:b)],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_args_9_2.txt b/test/yarp/snapshots/seattlerb/iter_args_9_2.txt
new file mode 100644
index 0000000000..b85e5a84bb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_args_9_2.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [CallNode(0...21)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...21)(
+         [:a, :b, :c],
+         BlockParametersNode(4...19)(
+           ParametersNode(5...18)(
+             [],
+             [OptionalParameterNode(5...11)(
+                :a,
+                (5...6),
+                (7...8),
+                IntegerNode(9...11)()
+              )],
+             [RequiredParameterNode(13...14)(:b)],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(16...18)((17...18), (16...17))
+           ),
+           [],
+           (4...5),
+           (18...19)
+         ),
+         nil,
+         (2...3),
+         (20...21)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_kwarg.txt b/test/yarp/snapshots/seattlerb/iter_kwarg.txt
new file mode 100644
index 0000000000..a3984ee42f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_kwarg.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...12)(
+         [:b],
+         BlockParametersNode(4...10)(
+           ParametersNode(5...9)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(5...9)((5...7), IntegerNode(8...9)())],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (9...10)
+         ),
+         nil,
+         (2...3),
+         (11...12)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/iter_kwarg_kwsplat.txt b/test/yarp/snapshots/seattlerb/iter_kwarg_kwsplat.txt
new file mode 100644
index 0000000000..39dce0cca3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/iter_kwarg_kwsplat.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:b, :c],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(5...9)((5...7), IntegerNode(8...9)())],
+             KeywordRestParameterNode(11...14)((11...13), (13...14)),
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me.txt b/test/yarp/snapshots/seattlerb/kill_me.txt
new file mode 100644
index 0000000000..ba5d6c3aed
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:a, :b, :c],
+         BlockParametersNode(4...16)(
+           ParametersNode(5...15)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...15)(
+                [RequiredParameterNode(9...10)(:b),
+                 SplatNode(12...14)(
+                   (12...13),
+                   RequiredParameterNode(13...14)(:c)
+                 )],
+                (8...9),
+                (14...15)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me2.txt b/test/yarp/snapshots/seattlerb/kill_me2.txt
new file mode 100644
index 0000000000..3981937066
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me2.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...13)(
+         [:a, :b],
+         BlockParametersNode(4...11)(
+           ParametersNode(5...10)(
+             [],
+             [],
+             [RequiredParameterNode(9...10)(:b)],
+             RestParameterNode(5...7)((5...6), (6...7)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (10...11)
+         ),
+         nil,
+         (2...3),
+         (12...13)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me3.txt b/test/yarp/snapshots/seattlerb/kill_me3.txt
new file mode 100644
index 0000000000..7a25bc9c8b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me3.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:a, :b, :c],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [],
+             [],
+             [RequiredParameterNode(9...10)(:b)],
+             RestParameterNode(5...7)((5...6), (6...7)),
+             [],
+             nil,
+             BlockParameterNode(12...14)((13...14), (12...13))
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me4.txt b/test/yarp/snapshots/seattlerb/kill_me4.txt
new file mode 100644
index 0000000000..80211017a6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me4.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...17)(
+  [:a],
+  StatementsNode(0...17)(
+    [LocalVariableWriteNode(0...17)(
+       :a,
+       0,
+       IfNode(2...17)(
+         nil,
+         CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "b"),
+         StatementsNode(6...10)([TrueNode(6...10)()]),
+         ElseNode(10...17)(
+           (10...11),
+           StatementsNode(12...17)([FalseNode(12...17)()]),
+           nil
+         ),
+         nil
+       ),
+       (0...1),
+       (1...2)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me5.txt b/test/yarp/snapshots/seattlerb/kill_me5.txt
new file mode 100644
index 0000000000..e7aaafc87a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me5.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [CallNode(0...19)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...19)(
+         [LambdaNode(2...19)(
+            [],
+            (2...4),
+            BlockParametersNode(4...6)(nil, [], (4...5), (5...6)),
+            StatementsNode(9...17)(
+              [CallNode(9...17)(
+                 nil,
+                 nil,
+                 (9...10),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(11...17)([], nil, nil, (11...13), (14...17)),
+                 0,
+                 "g"
+               )]
+            )
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_10.txt b/test/yarp/snapshots/seattlerb/kill_me_10.txt
new file mode 100644
index 0000000000..7b7dc6f41b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_10.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:a, :b, :c],
+         BlockParametersNode(4...16)(
+           ParametersNode(5...15)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...15)(
+                [SplatNode(9...11)(
+                   (9...10),
+                   RequiredParameterNode(10...11)(:b)
+                 ),
+                 RequiredParameterNode(13...14)(:c)],
+                (8...9),
+                (14...15)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_11.txt b/test/yarp/snapshots/seattlerb/kill_me_11.txt
new file mode 100644
index 0000000000..c5b8b81b18
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_11.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...14)(
+         [:a],
+         BlockParametersNode(4...12)(
+           ParametersNode(5...11)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...11)(
+                [SplatNode(9...10)((9...10), nil)],
+                (8...9),
+                (10...11)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (11...12)
+         ),
+         nil,
+         (2...3),
+         (13...14)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_12.txt b/test/yarp/snapshots/seattlerb/kill_me_12.txt
new file mode 100644
index 0000000000..87dd280a9e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_12.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:a, :b],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...14)(
+                [SplatNode(9...10)((9...10), nil),
+                 RequiredParameterNode(12...13)(:b)],
+                (8...9),
+                (13...14)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_6.txt b/test/yarp/snapshots/seattlerb/kill_me_6.txt
new file mode 100644
index 0000000000..578a22e843
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_6.txt
@@ -0,0 +1,45 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [CallNode(0...21)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...21)(
+         [:a, :b, :c, :d],
+         BlockParametersNode(4...19)(
+           ParametersNode(5...18)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...18)(
+                [RequiredParameterNode(9...10)(:b),
+                 SplatNode(12...14)(
+                   (12...13),
+                   RequiredParameterNode(13...14)(:c)
+                 ),
+                 RequiredParameterNode(16...17)(:d)],
+                (8...9),
+                (17...18)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (18...19)
+         ),
+         nil,
+         (2...3),
+         (20...21)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_7.txt b/test/yarp/snapshots/seattlerb/kill_me_7.txt
new file mode 100644
index 0000000000..a306b1f895
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_7.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...17)(
+         [:a, :b],
+         BlockParametersNode(4...15)(
+           ParametersNode(5...14)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...14)(
+                [RequiredParameterNode(9...10)(:b),
+                 SplatNode(12...13)((12...13), nil)],
+                (8...9),
+                (13...14)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (14...15)
+         ),
+         nil,
+         (2...3),
+         (16...17)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_8.txt b/test/yarp/snapshots/seattlerb/kill_me_8.txt
new file mode 100644
index 0000000000..9d0eb81357
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_8.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [CallNode(0...20)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...20)(
+         [:a, :b, :c],
+         BlockParametersNode(4...18)(
+           ParametersNode(5...17)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...17)(
+                [RequiredParameterNode(9...10)(:b),
+                 SplatNode(12...13)((12...13), nil),
+                 RequiredParameterNode(15...16)(:c)],
+                (8...9),
+                (16...17)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (17...18)
+         ),
+         nil,
+         (2...3),
+         (19...20)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/kill_me_9.txt b/test/yarp/snapshots/seattlerb/kill_me_9.txt
new file mode 100644
index 0000000000..a3a5ccd89d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/kill_me_9.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...15)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...15)(
+         [:a, :b],
+         BlockParametersNode(4...13)(
+           ParametersNode(5...12)(
+             [RequiredParameterNode(5...6)(:a),
+              RequiredDestructuredParameterNode(8...12)(
+                [SplatNode(9...11)(
+                   (9...10),
+                   RequiredParameterNode(10...11)(:b)
+                 )],
+                (8...9),
+                (11...12)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (12...13)
+         ),
+         nil,
+         (2...3),
+         (14...15)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/label_vs_string.txt b/test/yarp/snapshots/seattlerb/label_vs_string.txt
new file mode 100644
index 0000000000..bc2718a208
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/label_vs_string.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       CallNode(0...4)(nil, nil, (0...4), nil, nil, nil, nil, 0, "_buf"),
+       nil,
+       (5...7),
+       nil,
+       ArgumentsNode(8...12)(
+         [StringNode(8...12)((8...9), (9...11), (11...12), ":\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "<<"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lambda_do_vs_brace.txt b/test/yarp/snapshots/seattlerb/lambda_do_vs_brace.txt
new file mode 100644
index 0000000000..1c9e2efc33
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lambda_do_vs_brace.txt
@@ -0,0 +1,63 @@
+ProgramNode(0...46)(
+  [],
+  StatementsNode(0...46)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...11)([LambdaNode(2...11)([], (2...4), nil, nil)]),
+       nil,
+       nil,
+       0,
+       "f"
+     ),
+     CallNode(13...20)(
+       nil,
+       nil,
+       (13...14),
+       nil,
+       ArgumentsNode(15...20)([LambdaNode(15...20)([], (15...17), nil, nil)]),
+       nil,
+       nil,
+       0,
+       "f"
+     ),
+     CallNode(22...35)(
+       nil,
+       nil,
+       (22...23),
+       nil,
+       ArgumentsNode(24...35)(
+         [LambdaNode(24...35)(
+            [],
+            (24...26),
+            BlockParametersNode(26...28)(nil, [], (26...27), (27...28)),
+            nil
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "f"
+     ),
+     CallNode(37...46)(
+       nil,
+       nil,
+       (37...38),
+       nil,
+       ArgumentsNode(39...46)(
+         [LambdaNode(39...46)(
+            [],
+            (39...41),
+            BlockParametersNode(41...43)(nil, [], (41...42), (42...43)),
+            nil
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_arg_rescue_arg.txt b/test/yarp/snapshots/seattlerb/lasgn_arg_rescue_arg.txt
new file mode 100644
index 0000000000..03ec05d3a3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_arg_rescue_arg.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...14)(
+  [:a],
+  StatementsNode(0...14)(
+    [LocalVariableWriteNode(0...14)(
+       :a,
+       0,
+       RescueModifierNode(4...14)(
+         IntegerNode(4...5)(),
+         (6...12),
+         IntegerNode(13...14)()
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_call_bracket_rescue_arg.txt b/test/yarp/snapshots/seattlerb/lasgn_call_bracket_rescue_arg.txt
new file mode 100644
index 0000000000..c28b8c2178
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_call_bracket_rescue_arg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...17)(
+  [:a],
+  StatementsNode(0...17)(
+    [LocalVariableWriteNode(0...17)(
+       :a,
+       0,
+       RescueModifierNode(4...17)(
+         CallNode(4...8)(
+           nil,
+           nil,
+           (4...5),
+           (5...6),
+           ArgumentsNode(6...7)([IntegerNode(6...7)()]),
+           (7...8),
+           nil,
+           0,
+           "b"
+         ),
+         (9...15),
+         IntegerNode(16...17)()
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_call_nobracket_rescue_arg.txt b/test/yarp/snapshots/seattlerb/lasgn_call_nobracket_rescue_arg.txt
new file mode 100644
index 0000000000..bfb7c9b678
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_call_nobracket_rescue_arg.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...16)(
+  [:a],
+  StatementsNode(0...16)(
+    [LocalVariableWriteNode(0...16)(
+       :a,
+       0,
+       CallNode(4...16)(
+         nil,
+         nil,
+         (4...5),
+         nil,
+         ArgumentsNode(6...16)(
+           [RescueModifierNode(6...16)(
+              IntegerNode(6...7)(),
+              (8...14),
+              IntegerNode(15...16)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "b"
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_command.txt b/test/yarp/snapshots/seattlerb/lasgn_command.txt
new file mode 100644
index 0000000000..3f27e4f78c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_command.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...9)(
+  [:a],
+  StatementsNode(0...9)(
+    [LocalVariableWriteNode(0...9)(
+       :a,
+       0,
+       CallNode(4...9)(
+         CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "b"),
+         (5...6),
+         (6...7),
+         nil,
+         ArgumentsNode(8...9)([IntegerNode(8...9)()]),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_env.txt b/test/yarp/snapshots/seattlerb/lasgn_env.txt
new file mode 100644
index 0000000000..33f2f4701c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_env.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...6)(
+  [:a],
+  StatementsNode(0...6)(
+    [LocalVariableWriteNode(0...6)(
+       :a,
+       0,
+       IntegerNode(4...6)(),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_ivar_env.txt b/test/yarp/snapshots/seattlerb/lasgn_ivar_env.txt
new file mode 100644
index 0000000000..b71eeaf2a7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_ivar_env.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [InstanceVariableWriteNode(0...7)((0...2), IntegerNode(5...7)(), (3...4))]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_lasgn_command_call.txt b/test/yarp/snapshots/seattlerb/lasgn_lasgn_command_call.txt
new file mode 100644
index 0000000000..4c272c1680
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_lasgn_command_call.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...11)(
+  [:a, :b],
+  StatementsNode(0...11)(
+    [LocalVariableWriteNode(0...11)(
+       :a,
+       0,
+       LocalVariableWriteNode(4...11)(
+         :b,
+         0,
+         CallNode(8...11)(
+           nil,
+           nil,
+           (8...9),
+           nil,
+           ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+           nil,
+           nil,
+           0,
+           "c"
+         ),
+         (4...5),
+         (6...7)
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/lasgn_middle_splat.txt b/test/yarp/snapshots/seattlerb/lasgn_middle_splat.txt
new file mode 100644
index 0000000000..b9cb8e9f9b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/lasgn_middle_splat.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...12)(
+  [:a],
+  StatementsNode(0...12)(
+    [LocalVariableWriteNode(0...12)(
+       :a,
+       0,
+       ArrayNode(4...12)(
+         [CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "b"),
+          SplatNode(7...9)(
+            (7...8),
+            CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "c")
+          ),
+          CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "d")],
+         nil,
+         nil
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/magic_encoding_comment.txt b/test/yarp/snapshots/seattlerb/magic_encoding_comment.txt
new file mode 100644
index 0000000000..2ab320eda8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/magic_encoding_comment.txt
@@ -0,0 +1,36 @@
+ProgramNode(18...90)(
+  [],
+  StatementsNode(18...90)(
+    [ClassNode(18...90)(
+       [],
+       (18...23),
+       ConstantReadNode(24...52)(),
+       nil,
+       nil,
+       StatementsNode(54...86)(
+         [DefNode(54...86)(
+            (63...65),
+            SelfNode(58...62)(),
+            nil,
+            StatementsNode(67...81)(
+              [LocalVariableWriteNode(67...81)(
+                 :così,
+                 0,
+                 SymbolNode(75...81)((75...76), (76...81), nil, "però"),
+                 (67...72),
+                 (73...74)
+               )]
+            ),
+            [:così],
+            (54...57),
+            (62...63),
+            nil,
+            nil,
+            nil,
+            (83...86)
+          )]
+       ),
+       (87...90)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_anon_splat_arg.txt b/test/yarp/snapshots/seattlerb/masgn_anon_splat_arg.txt
new file mode 100644
index 0000000000..eb18d7615b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_anon_splat_arg.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...8)(
+  [:a],
+  StatementsNode(0...8)(
+    [MultiWriteNode(0...8)(
+       [MultiWriteNode(0...1)(
+          [SplatNode(0...1)((0...1), nil)],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(3...4)(:a, 0, nil, (3...4), nil)],
+       (5...6),
+       CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "b"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_arg_colon_arg.txt b/test/yarp/snapshots/seattlerb/masgn_arg_colon_arg.txt
new file mode 100644
index 0000000000..4b90bf3ddc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_arg_colon_arg.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...11)(
+  [:a],
+  StatementsNode(0...11)(
+    [MultiWriteNode(0...11)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        CallNode(3...7)(
+          CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "b"),
+          (4...6),
+          (6...7),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "c="
+        )],
+       (8...9),
+       CallNode(10...11)(nil, nil, (10...11), nil, nil, nil, nil, 0, "d"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_arg_ident.txt b/test/yarp/snapshots/seattlerb/masgn_arg_ident.txt
new file mode 100644
index 0000000000..7ca20a45ad
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_arg_ident.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...10)(
+  [:a],
+  StatementsNode(0...10)(
+    [MultiWriteNode(0...10)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        CallNode(3...6)(
+          CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "b"),
+          (4...5),
+          (5...6),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "C="
+        )],
+       (7...8),
+       CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "d"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_arg_splat_arg.txt b/test/yarp/snapshots/seattlerb/masgn_arg_splat_arg.txt
new file mode 100644
index 0000000000..cdabe61852
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_arg_splat_arg.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...12)(
+  [:a, :b, :c],
+  StatementsNode(0...12)(
+    [MultiWriteNode(0...12)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        SplatNode(3...5)(
+          (3...4),
+          LocalVariableWriteNode(4...5)(:b, 0, nil, (4...5), nil)
+        ),
+        LocalVariableWriteNode(7...8)(:c, 0, nil, (7...8), nil)],
+       (9...10),
+       CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "d"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_colon2.txt b/test/yarp/snapshots/seattlerb/masgn_colon2.txt
new file mode 100644
index 0000000000..32d035afa3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_colon2.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...14)(
+  [:a],
+  StatementsNode(0...14)(
+    [MultiWriteNode(0...14)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        ConstantPathWriteNode(3...7)(
+          ConstantPathNode(3...7)(
+            CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "b"),
+            ConstantReadNode(6...7)(),
+            (4...6)
+          ),
+          nil,
+          nil
+        )],
+       (8...9),
+       ArrayNode(10...14)(
+         [IntegerNode(10...11)(), IntegerNode(13...14)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_colon3.txt b/test/yarp/snapshots/seattlerb/masgn_colon3.txt
new file mode 100644
index 0000000000..f02dcc1f50
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_colon3.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [MultiWriteNode(0...15)(
+       [ConstantPathWriteNode(0...3)(
+          ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+          nil,
+          nil
+        ),
+        ConstantPathWriteNode(5...8)(
+          ConstantPathNode(5...8)(nil, ConstantReadNode(7...8)(), (5...7)),
+          nil,
+          nil
+        )],
+       (9...10),
+       ArrayNode(11...15)(
+         [IntegerNode(11...12)(), IntegerNode(14...15)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_command_call.txt b/test/yarp/snapshots/seattlerb/masgn_command_call.txt
new file mode 100644
index 0000000000..8ffc56de6f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_command_call.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...10)(
+  [:a],
+  StatementsNode(0...10)(
+    [MultiWriteNode(0...10)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        SplatNode(1...2)((1...2), nil)],
+       (3...4),
+       CallNode(5...10)(
+         CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "b"),
+         (6...7),
+         (7...8),
+         nil,
+         ArgumentsNode(9...10)([IntegerNode(9...10)()]),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_double_paren.txt b/test/yarp/snapshots/seattlerb/masgn_double_paren.txt
new file mode 100644
index 0000000000..85b4f05f31
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_double_paren.txt
@@ -0,0 +1,19 @@
+ProgramNode(2...9)(
+  [:a, :b],
+  StatementsNode(2...9)(
+    [MultiWriteNode(2...9)(
+       [MultiWriteNode(2...5)(
+          [LocalVariableWriteNode(2...3)(:a, 0, nil, (2...3), nil),
+           LocalVariableWriteNode(4...5)(:b, 0, nil, (4...5), nil)],
+          nil,
+          nil,
+          (1...2),
+          (5...6)
+        )],
+       (7...8),
+       CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "c"),
+       (0...1),
+       (6...7)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_lhs_splat.txt b/test/yarp/snapshots/seattlerb/masgn_lhs_splat.txt
new file mode 100644
index 0000000000..e8606e7152
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_lhs_splat.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...12)(
+  [:a],
+  StatementsNode(0...12)(
+    [MultiWriteNode(0...12)(
+       [SplatNode(0...2)(
+          (0...1),
+          LocalVariableWriteNode(1...2)(:a, 0, nil, (1...2), nil)
+        )],
+       (3...4),
+       ArrayNode(5...12)(
+         [IntegerNode(5...6)(), IntegerNode(8...9)(), IntegerNode(11...12)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_paren.txt b/test/yarp/snapshots/seattlerb/masgn_paren.txt
new file mode 100644
index 0000000000..cdf4678bc4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_paren.txt
@@ -0,0 +1,23 @@
+ProgramNode(1...12)(
+  [:a, :b],
+  StatementsNode(1...12)(
+    [MultiWriteNode(1...12)(
+       [LocalVariableWriteNode(1...2)(:a, 0, nil, (1...2), nil),
+        LocalVariableWriteNode(4...5)(:b, 0, nil, (4...5), nil)],
+       (7...8),
+       CallNode(9...12)(
+         CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "c"),
+         (10...11),
+         (11...12),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "d"
+       ),
+       (0...1),
+       (5...6)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_splat_arg.txt b/test/yarp/snapshots/seattlerb/masgn_splat_arg.txt
new file mode 100644
index 0000000000..783ddde19a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_splat_arg.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...9)(
+  [:a, :b],
+  StatementsNode(0...9)(
+    [MultiWriteNode(0...9)(
+       [MultiWriteNode(0...2)(
+          [SplatNode(0...2)(
+             (0...1),
+             LocalVariableWriteNode(1...2)(:a, 0, nil, (1...2), nil)
+           )],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(4...5)(:b, 0, nil, (4...5), nil)],
+       (6...7),
+       CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "c"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_splat_arg_arg.txt b/test/yarp/snapshots/seattlerb/masgn_splat_arg_arg.txt
new file mode 100644
index 0000000000..be516e972b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_splat_arg_arg.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...12)(
+  [:a, :b, :c],
+  StatementsNode(0...12)(
+    [MultiWriteNode(0...12)(
+       [MultiWriteNode(0...2)(
+          [SplatNode(0...2)(
+             (0...1),
+             LocalVariableWriteNode(1...2)(:a, 0, nil, (1...2), nil)
+           )],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(4...5)(:b, 0, nil, (4...5), nil),
+        LocalVariableWriteNode(7...8)(:c, 0, nil, (7...8), nil)],
+       (9...10),
+       CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "d"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_star.txt b/test/yarp/snapshots/seattlerb/masgn_star.txt
new file mode 100644
index 0000000000..8b7cb8e266
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_star.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [MultiWriteNode(0...5)(
+       [SplatNode(0...1)((0...1), nil)],
+       (2...3),
+       IntegerNode(4...5)(),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/masgn_var_star_var.txt b/test/yarp/snapshots/seattlerb/masgn_var_star_var.txt
new file mode 100644
index 0000000000..b172d0bb86
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/masgn_var_star_var.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...11)(
+  [:a, :b],
+  StatementsNode(0...11)(
+    [MultiWriteNode(0...11)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        SplatNode(3...4)((3...4), nil),
+        LocalVariableWriteNode(6...7)(:b, 0, nil, (6...7), nil)],
+       (8...9),
+       CallNode(10...11)(nil, nil, (10...11), nil, nil, nil, nil, 0, "c"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/messy_op_asgn_lineno.txt b/test/yarp/snapshots/seattlerb/messy_op_asgn_lineno.txt
new file mode 100644
index 0000000000..146ce2d61a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/messy_op_asgn_lineno.txt
@@ -0,0 +1,55 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...15)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...15)(
+         [ParenthesesNode(2...15)(
+            StatementsNode(3...14)(
+              [ConstantPathOperatorWriteNode(3...14)(
+                 ConstantPathNode(3...7)(
+                   ConstantReadNode(3...4)(),
+                   ConstantReadNode(6...7)(),
+                   (4...6)
+                 ),
+                 (8...10),
+                 CallNode(11...14)(
+                   nil,
+                   nil,
+                   (11...12),
+                   nil,
+                   ArgumentsNode(13...14)(
+                     [CallNode(13...14)(
+                        nil,
+                        nil,
+                        (13...14),
+                        nil,
+                        nil,
+                        nil,
+                        nil,
+                        0,
+                        "e"
+                      )]
+                   ),
+                   nil,
+                   nil,
+                   0,
+                   "d"
+                 ),
+                 :*
+               )]
+            ),
+            (2...3),
+            (14...15)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/method_call_assoc_trailing_comma.txt b/test/yarp/snapshots/seattlerb/method_call_assoc_trailing_comma.txt
new file mode 100644
index 0000000000..9b8bec66d2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/method_call_assoc_trailing_comma.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...10)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       (3...4),
+       ArgumentsNode(4...8)(
+         [KeywordHashNode(4...8)(
+            [AssocNode(4...8)(
+               IntegerNode(4...5)(),
+               IntegerNode(7...8)(),
+               (5...7)
+             )]
+          )]
+       ),
+       (9...10),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/method_call_trailing_comma.txt b/test/yarp/snapshots/seattlerb/method_call_trailing_comma.txt
new file mode 100644
index 0000000000..93a93d6a15
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/method_call_trailing_comma.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       (3...4),
+       ArgumentsNode(4...5)([IntegerNode(4...5)()]),
+       (6...7),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_back_anonsplat.txt b/test/yarp/snapshots/seattlerb/mlhs_back_anonsplat.txt
new file mode 100644
index 0000000000..410cfc8f14
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_back_anonsplat.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...14)(
+  [:a, :b, :c],
+  StatementsNode(0...14)(
+    [MultiWriteNode(0...14)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        LocalVariableWriteNode(3...4)(:b, 0, nil, (3...4), nil),
+        LocalVariableWriteNode(6...7)(:c, 0, nil, (6...7), nil),
+        SplatNode(9...10)((9...10), nil)],
+       (11...12),
+       CallNode(13...14)(nil, nil, (13...14), nil, nil, nil, nil, 0, "f"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_back_splat.txt b/test/yarp/snapshots/seattlerb/mlhs_back_splat.txt
new file mode 100644
index 0000000000..8086347e13
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_back_splat.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...15)(
+  [:a, :b, :c, :s],
+  StatementsNode(0...15)(
+    [MultiWriteNode(0...15)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        LocalVariableWriteNode(3...4)(:b, 0, nil, (3...4), nil),
+        LocalVariableWriteNode(6...7)(:c, 0, nil, (6...7), nil),
+        SplatNode(9...11)(
+          (9...10),
+          LocalVariableWriteNode(10...11)(:s, 0, nil, (10...11), nil)
+        )],
+       (12...13),
+       CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "f"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_front_anonsplat.txt b/test/yarp/snapshots/seattlerb/mlhs_front_anonsplat.txt
new file mode 100644
index 0000000000..beaadf1892
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_front_anonsplat.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...14)(
+  [:x, :y, :z],
+  StatementsNode(0...14)(
+    [MultiWriteNode(0...14)(
+       [MultiWriteNode(0...1)(
+          [SplatNode(0...1)((0...1), nil)],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(3...4)(:x, 0, nil, (3...4), nil),
+        LocalVariableWriteNode(6...7)(:y, 0, nil, (6...7), nil),
+        LocalVariableWriteNode(9...10)(:z, 0, nil, (9...10), nil)],
+       (11...12),
+       CallNode(13...14)(nil, nil, (13...14), nil, nil, nil, nil, 0, "f"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_front_splat.txt b/test/yarp/snapshots/seattlerb/mlhs_front_splat.txt
new file mode 100644
index 0000000000..0c786546d3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_front_splat.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...15)(
+  [:s, :x, :y, :z],
+  StatementsNode(0...15)(
+    [MultiWriteNode(0...15)(
+       [MultiWriteNode(0...2)(
+          [SplatNode(0...2)(
+             (0...1),
+             LocalVariableWriteNode(1...2)(:s, 0, nil, (1...2), nil)
+           )],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(4...5)(:x, 0, nil, (4...5), nil),
+        LocalVariableWriteNode(7...8)(:y, 0, nil, (7...8), nil),
+        LocalVariableWriteNode(10...11)(:z, 0, nil, (10...11), nil)],
+       (12...13),
+       CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "f"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_keyword.txt b/test/yarp/snapshots/seattlerb/mlhs_keyword.txt
new file mode 100644
index 0000000000..2b5fc37ee0
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_keyword.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...4),
+       (4...5),
+       ArgumentsNode(5...15)([TrueNode(5...9)(), TrueNode(11...15)()]),
+       (15...16),
+       nil,
+       0,
+       "!="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_mid_anonsplat.txt b/test/yarp/snapshots/seattlerb/mlhs_mid_anonsplat.txt
new file mode 100644
index 0000000000..54cab7d7f8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_mid_anonsplat.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...23)(
+  [:a, :b, :c, :x, :y, :z],
+  StatementsNode(0...23)(
+    [MultiWriteNode(0...23)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        LocalVariableWriteNode(3...4)(:b, 0, nil, (3...4), nil),
+        LocalVariableWriteNode(6...7)(:c, 0, nil, (6...7), nil),
+        SplatNode(9...10)((9...10), nil),
+        LocalVariableWriteNode(12...13)(:x, 0, nil, (12...13), nil),
+        LocalVariableWriteNode(15...16)(:y, 0, nil, (15...16), nil),
+        LocalVariableWriteNode(18...19)(:z, 0, nil, (18...19), nil)],
+       (20...21),
+       CallNode(22...23)(nil, nil, (22...23), nil, nil, nil, nil, 0, "f"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_mid_splat.txt b/test/yarp/snapshots/seattlerb/mlhs_mid_splat.txt
new file mode 100644
index 0000000000..e8dd882dd2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_mid_splat.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...24)(
+  [:a, :b, :c, :s, :x, :y, :z],
+  StatementsNode(0...24)(
+    [MultiWriteNode(0...24)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        LocalVariableWriteNode(3...4)(:b, 0, nil, (3...4), nil),
+        LocalVariableWriteNode(6...7)(:c, 0, nil, (6...7), nil),
+        SplatNode(9...11)(
+          (9...10),
+          LocalVariableWriteNode(10...11)(:s, 0, nil, (10...11), nil)
+        ),
+        LocalVariableWriteNode(13...14)(:x, 0, nil, (13...14), nil),
+        LocalVariableWriteNode(16...17)(:y, 0, nil, (16...17), nil),
+        LocalVariableWriteNode(19...20)(:z, 0, nil, (19...20), nil)],
+       (21...22),
+       CallNode(23...24)(nil, nil, (23...24), nil, nil, nil, nil, 0, "f"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/mlhs_rescue.txt b/test/yarp/snapshots/seattlerb/mlhs_rescue.txt
new file mode 100644
index 0000000000..cd6276e76e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/mlhs_rescue.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...18)(
+  [:a, :b],
+  StatementsNode(0...18)(
+    [MultiWriteNode(0...18)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        LocalVariableWriteNode(3...4)(:b, 0, nil, (3...4), nil)],
+       (5...6),
+       RescueModifierNode(7...18)(
+         CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "f"),
+         (9...15),
+         IntegerNode(16...18)()
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/module_comments.txt b/test/yarp/snapshots/seattlerb/module_comments.txt
new file mode 100644
index 0000000000..5d11f23a4d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/module_comments.txt
@@ -0,0 +1,26 @@
+ProgramNode(22...75)(
+  [],
+  StatementsNode(22...75)(
+    [ModuleNode(22...75)(
+       [],
+       (22...28),
+       ConstantReadNode(29...30)(),
+       StatementsNode(44...71)(
+         [DefNode(44...71)(
+            (48...52),
+            nil,
+            nil,
+            nil,
+            [],
+            (44...47),
+            nil,
+            nil,
+            nil,
+            nil,
+            (68...71)
+          )]
+       ),
+       (72...75)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/motherfuckin_leading_dots.txt b/test/yarp/snapshots/seattlerb/motherfuckin_leading_dots.txt
new file mode 100644
index 0000000000..352bcbab60
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/motherfuckin_leading_dots.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (2...3),
+       (3...4),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/motherfuckin_leading_dots2.txt b/test/yarp/snapshots/seattlerb/motherfuckin_leading_dots2.txt
new file mode 100644
index 0000000000..8a246f5827
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/motherfuckin_leading_dots2.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [IntegerNode(0...1)(),
+     RangeNode(2...5)(nil, IntegerNode(4...5)(), (2...4), 0)]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/multiline_hash_declaration.txt b/test/yarp/snapshots/seattlerb/multiline_hash_declaration.txt
new file mode 100644
index 0000000000..e6e341fc7c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/multiline_hash_declaration.txt
@@ -0,0 +1,62 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...13)(
+         [KeywordHashNode(2...13)(
+            [AssocNode(2...13)(
+               SymbolNode(2...8)(nil, (2...7), (7...8), "state"),
+               HashNode(10...13)((10...11), [], (12...13)),
+               nil
+             )]
+          )]
+       ),
+       (13...14),
+       nil,
+       0,
+       "f"
+     ),
+     CallNode(16...29)(
+       nil,
+       nil,
+       (16...17),
+       (17...18),
+       ArgumentsNode(18...28)(
+         [KeywordHashNode(18...28)(
+            [AssocNode(18...28)(
+               SymbolNode(18...24)(nil, (18...23), (23...24), "state"),
+               HashNode(25...28)((25...26), [], (27...28)),
+               nil
+             )]
+          )]
+       ),
+       (28...29),
+       nil,
+       0,
+       "f"
+     ),
+     CallNode(31...43)(
+       nil,
+       nil,
+       (31...32),
+       (32...33),
+       ArgumentsNode(33...42)(
+         [KeywordHashNode(33...42)(
+            [AssocNode(33...42)(
+               SymbolNode(33...39)(nil, (33...38), (38...39), "state"),
+               HashNode(40...42)((40...41), [], (41...42)),
+               nil
+             )]
+          )]
+       ),
+       (42...43),
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/non_interpolated_symbol_array_line_breaks.txt b/test/yarp/snapshots/seattlerb/non_interpolated_symbol_array_line_breaks.txt
new file mode 100644
index 0000000000..0a779610a6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/non_interpolated_symbol_array_line_breaks.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...9)(
+       [SymbolNode(4...5)(nil, (4...5), nil, "a"),
+        SymbolNode(6...7)(nil, (6...7), nil, "b")],
+       (0...3),
+       (8...9)
+     ),
+     IntegerNode(10...11)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/non_interpolated_word_array_line_breaks.txt b/test/yarp/snapshots/seattlerb/non_interpolated_word_array_line_breaks.txt
new file mode 100644
index 0000000000..901575f9a8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/non_interpolated_word_array_line_breaks.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...9)(
+       [StringNode(4...5)(nil, (4...5), nil, "a"),
+        StringNode(6...7)(nil, (6...7), nil, "b")],
+       (0...3),
+       (8...9)
+     ),
+     IntegerNode(10...11)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_command_call.txt b/test/yarp/snapshots/seattlerb/op_asgn_command_call.txt
new file mode 100644
index 0000000000..256a063f40
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_command_call.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...11)(
+  [:a],
+  StatementsNode(0...11)(
+    [LocalVariableOperatorOrWriteNode(0...11)(
+       (0...1),
+       (2...5),
+       CallNode(6...11)(
+         CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b"),
+         (7...8),
+         (8...9),
+         nil,
+         ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       :a
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_dot_ident_command_call.txt b/test/yarp/snapshots/seattlerb/op_asgn_dot_ident_command_call.txt
new file mode 100644
index 0000000000..0bb9c07eba
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_dot_ident_command_call.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallOperatorOrWriteNode(0...11)(
+       CallNode(0...3)(
+         ConstantReadNode(0...1)(),
+         (1...2),
+         (2...3),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "B="
+       ),
+       CallNode(8...11)(
+         nil,
+         nil,
+         (8...9),
+         nil,
+         ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       (4...7)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_index_command_call.txt b/test/yarp/snapshots/seattlerb/op_asgn_index_command_call.txt
new file mode 100644
index 0000000000..9b7b6f93da
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_index_command_call.txt
@@ -0,0 +1,32 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallOperatorOrWriteNode(0...16)(
+       CallNode(0...5)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         nil,
+         (1...5),
+         (1...2),
+         ArgumentsNode(2...4)([SymbolNode(2...4)((2...3), (3...4), nil, "b")]),
+         (4...5),
+         nil,
+         0,
+         "[]="
+       ),
+       CallNode(10...16)(
+         nil,
+         nil,
+         (10...11),
+         nil,
+         ArgumentsNode(12...16)(
+           [IntegerNode(12...13)(), IntegerNode(15...16)()]
+         ),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       (6...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_const_command_call.txt b/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_const_command_call.txt
new file mode 100644
index 0000000000..051acb85b5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_const_command_call.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ConstantPathOperatorWriteNode(0...11)(
+       ConstantPathNode(0...4)(
+         ConstantReadNode(0...1)(),
+         ConstantReadNode(3...4)(),
+         (1...3)
+       ),
+       (5...7),
+       CallNode(8...11)(
+         nil,
+         nil,
+         (8...9),
+         nil,
+         ArgumentsNode(10...11)(
+           [CallNode(10...11)(nil, nil, (10...11), nil, nil, nil, nil, 0, "d")]
+         ),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       :*
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_identifier1.txt b/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_identifier1.txt
new file mode 100644
index 0000000000..88847480ee
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_identifier1.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallOperatorWriteNode(0...9)(
+       CallNode(0...4)(
+         ConstantReadNode(0...1)(),
+         (1...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (5...7),
+       IntegerNode(8...9)(),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_identifier_command_call.txt b/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_identifier_command_call.txt
new file mode 100644
index 0000000000..5ca0e3ce5c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_primary_colon_identifier_command_call.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallOperatorWriteNode(0...11)(
+       CallNode(0...4)(
+         ConstantReadNode(0...1)(),
+         (1...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (5...7),
+       CallNode(8...11)(
+         nil,
+         nil,
+         (8...9),
+         nil,
+         ArgumentsNode(10...11)(
+           [CallNode(10...11)(nil, nil, (10...11), nil, nil, nil, nil, 0, "d")]
+         ),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       :*
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/op_asgn_val_dot_ident_command_call.txt b/test/yarp/snapshots/seattlerb/op_asgn_val_dot_ident_command_call.txt
new file mode 100644
index 0000000000..363660cf20
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/op_asgn_val_dot_ident_command_call.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallOperatorOrWriteNode(0...11)(
+       CallNode(0...3)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...2),
+         (2...3),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       CallNode(8...11)(
+         nil,
+         nil,
+         (8...9),
+         nil,
+         ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       (4...7)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_def_special_name.txt b/test/yarp/snapshots/seattlerb/parse_def_special_name.txt
new file mode 100644
index 0000000000..a266ddf094
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_def_special_name.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [DefNode(0...13)(
+       (4...8),
+       nil,
+       nil,
+       nil,
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (10...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_if_not_canonical.txt b/test/yarp/snapshots/seattlerb/parse_if_not_canonical.txt
new file mode 100644
index 0000000000..3d90e11f4c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_if_not_canonical.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...41)(
+  [],
+  StatementsNode(0...41)(
+    [IfNode(0...41)(
+       (0...2),
+       CallNode(3...15)(
+         CallNode(7...15)(
+           CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "var"),
+           (10...11),
+           (11...15),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "nil?"
+         ),
+         nil,
+         (3...6),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       StatementsNode(21...26)(
+         [StringNode(21...26)((21...22), (22...25), (25...26), "foo")]
+       ),
+       ElseNode(27...41)(
+         (27...31),
+         StatementsNode(32...37)(
+           [StringNode(32...37)((32...33), (33...36), (36...37), "bar")]
+         ),
+         (38...41)
+       ),
+       (38...41)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_if_not_noncanonical.txt b/test/yarp/snapshots/seattlerb/parse_if_not_noncanonical.txt
new file mode 100644
index 0000000000..3d90e11f4c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_if_not_noncanonical.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...41)(
+  [],
+  StatementsNode(0...41)(
+    [IfNode(0...41)(
+       (0...2),
+       CallNode(3...15)(
+         CallNode(7...15)(
+           CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "var"),
+           (10...11),
+           (11...15),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "nil?"
+         ),
+         nil,
+         (3...6),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       StatementsNode(21...26)(
+         [StringNode(21...26)((21...22), (22...25), (25...26), "foo")]
+       ),
+       ElseNode(27...41)(
+         (27...31),
+         StatementsNode(32...37)(
+           [StringNode(32...37)((32...33), (33...36), (36...37), "bar")]
+         ),
+         (38...41)
+       ),
+       (38...41)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_block.txt b/test/yarp/snapshots/seattlerb/parse_line_block.txt
new file mode 100644
index 0000000000..51282de977
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_block.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...10)(
+  [:a],
+  StatementsNode(0...10)(
+    [LocalVariableWriteNode(0...6)(
+       :a,
+       0,
+       IntegerNode(4...6)(),
+       (0...1),
+       (2...3)
+     ),
+     CallNode(7...10)(
+       nil,
+       nil,
+       (7...8),
+       nil,
+       ArgumentsNode(9...10)([LocalVariableReadNode(9...10)(:a, 0)]),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_block_inline_comment.txt b/test/yarp/snapshots/seattlerb/parse_line_block_inline_comment.txt
new file mode 100644
index 0000000000..76b2ec33fa
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_block_inline_comment.txt
@@ -0,0 +1,8 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+     CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "b"),
+     CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_block_inline_comment_leading_newlines.txt b/test/yarp/snapshots/seattlerb/parse_line_block_inline_comment_leading_newlines.txt
new file mode 100644
index 0000000000..0345dae43e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_block_inline_comment_leading_newlines.txt
@@ -0,0 +1,8 @@
+ProgramNode(3...36)(
+  [],
+  StatementsNode(3...36)(
+    [CallNode(3...4)(nil, nil, (3...4), nil, nil, nil, nil, 0, "a"),
+     CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "b"),
+     CallNode(35...36)(nil, nil, (35...36), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_block_inline_multiline_comment.txt b/test/yarp/snapshots/seattlerb/parse_line_block_inline_multiline_comment.txt
new file mode 100644
index 0000000000..d8486cb823
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_block_inline_multiline_comment.txt
@@ -0,0 +1,8 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+     CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "b"),
+     CallNode(32...33)(nil, nil, (32...33), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_call_ivar_arg_no_parens_line_break.txt b/test/yarp/snapshots/seattlerb/parse_line_call_ivar_arg_no_parens_line_break.txt
new file mode 100644
index 0000000000..b7cca1732b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_call_ivar_arg_no_parens_line_break.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...4)([InstanceVariableReadNode(2...4)()]),
+       nil,
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_call_ivar_line_break_paren.txt b/test/yarp/snapshots/seattlerb/parse_line_call_ivar_line_break_paren.txt
new file mode 100644
index 0000000000..ae67416e67
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_call_ivar_line_break_paren.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...4)([InstanceVariableReadNode(2...4)()]),
+       (5...6),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_call_no_args.txt b/test/yarp/snapshots/seattlerb/parse_line_call_no_args.txt
new file mode 100644
index 0000000000..229bfdaa9f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_call_no_args.txt
@@ -0,0 +1,48 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [CallNode(0...23)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...23)(
+         [:x, :y],
+         BlockParametersNode(5...11)(
+           ParametersNode(6...10)(
+             [RequiredParameterNode(6...7)(:x),
+              RequiredParameterNode(9...10)(:y)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (5...6),
+           (10...11)
+         ),
+         StatementsNode(14...19)(
+           [CallNode(14...19)(
+              LocalVariableReadNode(14...15)(:x, 0),
+              nil,
+              (16...17),
+              nil,
+              ArgumentsNode(18...19)([LocalVariableReadNode(18...19)(:y, 0)]),
+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (2...4),
+         (20...23)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_defn_complex.txt b/test/yarp/snapshots/seattlerb/parse_line_defn_complex.txt
new file mode 100644
index 0000000000..adf81b25d1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_defn_complex.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [DefNode(0...40)(
+       (4...5),
+       nil,
+       ParametersNode(6...7)(
+         [RequiredParameterNode(6...7)(:y)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(11...35)(
+         [CallNode(11...15)(
+            nil,
+            nil,
+            (11...12),
+            (12...13),
+            ArgumentsNode(13...14)([LocalVariableReadNode(13...14)(:y, 0)]),
+            (14...15),
+            nil,
+            0,
+            "p"
+          ),
+          LocalVariableOperatorWriteNode(18...24)(
+            (18...19),
+            (20...22),
+            IntegerNode(23...24)(),
+            :y,
+            :*
+          ),
+          ReturnNode(27...35)(
+            (27...33),
+            ArgumentsNode(34...35)([LocalVariableReadNode(34...35)(:y, 0)])
+          )]
+       ),
+       [:y],
+       (0...3),
+       nil,
+       (5...6),
+       (7...8),
+       nil,
+       (37...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_defn_no_parens.txt b/test/yarp/snapshots/seattlerb/parse_line_defn_no_parens.txt
new file mode 100644
index 0000000000..ff61047cbb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_defn_no_parens.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [DefNode(0...10)(
+       (4...5),
+       nil,
+       nil,
+       nil,
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (7...10)
+     ),
+     DefNode(12...21)(
+       (16...17),
+       nil,
+       nil,
+       nil,
+       [],
+       (12...15),
+       nil,
+       nil,
+       nil,
+       nil,
+       (18...21)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_defn_no_parens_args.txt b/test/yarp/snapshots/seattlerb/parse_line_defn_no_parens_args.txt
new file mode 100644
index 0000000000..eec5acfcd7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_defn_no_parens_args.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [DefNode(0...11)(
+       (4...5),
+       nil,
+       ParametersNode(6...7)(
+         [RequiredParameterNode(6...7)(:a)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (8...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_dot2.txt b/test/yarp/snapshots/seattlerb/parse_line_dot2.txt
new file mode 100644
index 0000000000..b535ac7c1c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_dot2.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [RangeNode(0...5)(IntegerNode(0...1)(), IntegerNode(4...5)(), (1...3), 0),
+     RangeNode(6...11)(
+       CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "a"),
+       CallNode(10...11)(nil, nil, (10...11), nil, nil, nil, nil, 0, "b"),
+       (7...9),
+       0
+     ),
+     CallNode(12...13)(nil, nil, (12...13), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_dot2_open.txt b/test/yarp/snapshots/seattlerb/parse_line_dot2_open.txt
new file mode 100644
index 0000000000..757e052c08
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_dot2_open.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [RangeNode(0...3)(IntegerNode(0...1)(), nil, (1...3), 0),
+     RangeNode(6...9)(
+       CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (7...9),
+       0
+     ),
+     CallNode(12...13)(nil, nil, (12...13), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_dot3.txt b/test/yarp/snapshots/seattlerb/parse_line_dot3.txt
new file mode 100644
index 0000000000..d50e6dc275
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_dot3.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [RangeNode(0...6)(IntegerNode(0...1)(), IntegerNode(5...6)(), (1...4), 1),
+     RangeNode(7...13)(
+       CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "a"),
+       CallNode(12...13)(nil, nil, (12...13), nil, nil, nil, nil, 0, "b"),
+       (8...11),
+       1
+     ),
+     CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_dot3_open.txt b/test/yarp/snapshots/seattlerb/parse_line_dot3_open.txt
new file mode 100644
index 0000000000..16cdc0cce8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_dot3_open.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [RangeNode(0...4)(IntegerNode(0...1)(), nil, (1...4), 1),
+     RangeNode(7...11)(
+       CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (8...11),
+       1
+     ),
+     CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_dstr_escaped_newline.txt b/test/yarp/snapshots/seattlerb/parse_line_dstr_escaped_newline.txt
new file mode 100644
index 0000000000..b6f92191b6
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_dstr_escaped_newline.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedStringNode(0...9)(
+       (0...1),
+       [StringNode(1...4)(nil, (1...4), nil, "a\n"),
+        EmbeddedStatementsNode(4...8)((4...6), nil, (7...8))],
+       (8...9)
+     ),
+     TrueNode(10...14)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_dstr_soft_newline.txt b/test/yarp/snapshots/seattlerb/parse_line_dstr_soft_newline.txt
new file mode 100644
index 0000000000..a22199b3ac
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_dstr_soft_newline.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [InterpolatedStringNode(0...8)(
+       (0...1),
+       [StringNode(1...3)(nil, (1...3), nil, "a\n"),
+        EmbeddedStatementsNode(3...7)((3...5), nil, (6...7))],
+       (7...8)
+     ),
+     TrueNode(9...13)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_evstr_after_break.txt b/test/yarp/snapshots/seattlerb/parse_line_evstr_after_break.txt
new file mode 100644
index 0000000000..3807c61b20
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_evstr_after_break.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [StringConcatNode(0...11)(
+       StringNode(0...3)((0...1), (1...2), (2...3), "a"),
+       InterpolatedStringNode(5...11)(
+         (5...6),
+         [EmbeddedStatementsNode(6...10)(
+            (6...8),
+            StatementsNode(8...9)(
+              [CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "b")]
+            ),
+            (9...10)
+          )],
+         (10...11)
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_hash_lit.txt b/test/yarp/snapshots/seattlerb/parse_line_hash_lit.txt
new file mode 100644
index 0000000000..a7dd5a1f7b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_hash_lit.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [HashNode(0...13)(
+       (0...1),
+       [AssocNode(2...10)(
+          SymbolNode(2...5)((2...3), (3...5), nil, "s1"),
+          IntegerNode(9...10)(),
+          (6...8)
+        )],
+       (12...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_heredoc.txt b/test/yarp/snapshots/seattlerb/parse_line_heredoc.txt
new file mode 100644
index 0000000000..e2a8c1c665
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_heredoc.txt
@@ -0,0 +1,42 @@
+ProgramNode(6...88)(
+  [:string],
+  StatementsNode(6...88)(
+    [LocalVariableWriteNode(6...31)(
+       :string,
+       0,
+       CallNode(15...31)(
+         InterpolatedStringNode(15...71)(
+           (15...25),
+           [StringNode(32...57)(
+              nil,
+              (32...57),
+              nil,
+              "        very long string\n"
+            )],
+           (57...71)
+         ),
+         (25...26),
+         (26...31),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "strip"
+       ),
+       (6...12),
+       (13...14)
+     ),
+     CallNode(77...88)(
+       nil,
+       nil,
+       (77...81),
+       nil,
+       ArgumentsNode(82...88)([LocalVariableReadNode(82...88)(:string, 0)]),
+       nil,
+       nil,
+       0,
+       "puts"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_heredoc_evstr.txt b/test/yarp/snapshots/seattlerb/parse_line_heredoc_evstr.txt
new file mode 100644
index 0000000000..e24231dcf9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_heredoc_evstr.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedStringNode(0...14)(
+       (0...4),
+       [StringNode(5...7)(nil, (5...7), nil, "a\n"),
+        EmbeddedStatementsNode(7...11)(
+          (7...9),
+          StatementsNode(9...10)(
+            [CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "b")]
+          ),
+          (10...11)
+        ),
+        StringNode(11...12)(nil, (11...12), nil, "\n")],
+       (12...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_heredoc_hardnewline.txt b/test/yarp/snapshots/seattlerb/parse_line_heredoc_hardnewline.txt
new file mode 100644
index 0000000000..573a260958
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_heredoc_hardnewline.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...48)(
+  [],
+  StatementsNode(0...48)(
+    [InterpolatedStringNode(0...34)(
+       (0...8),
+       [StringNode(9...28)(
+          nil,
+          (9...28),
+          nil,
+          "\n" + "\n" + "\n" + "\n" + "\n" + "\n" + "\n" + "\n" + "\n" + "\n"
+        )],
+       (28...34)
+     ),
+     ClassNode(35...48)(
+       [],
+       (35...40),
+       ConstantReadNode(41...44)(),
+       nil,
+       nil,
+       nil,
+       (45...48)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_heredoc_regexp_chars.txt b/test/yarp/snapshots/seattlerb/parse_line_heredoc_regexp_chars.txt
new file mode 100644
index 0000000000..c252ec45dc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_heredoc_regexp_chars.txt
@@ -0,0 +1,32 @@
+ProgramNode(6...74)(
+  [:string],
+  StatementsNode(6...74)(
+    [LocalVariableWriteNode(6...57)(
+       :string,
+       0,
+       InterpolatedStringNode(15...57)(
+         (15...22),
+         [StringNode(23...48)(
+            nil,
+            (23...48),
+            nil,
+            "        very long string\n"
+          )],
+         (48...57)
+       ),
+       (6...12),
+       (13...14)
+     ),
+     CallNode(63...74)(
+       nil,
+       nil,
+       (63...67),
+       nil,
+       ArgumentsNode(68...74)([LocalVariableReadNode(68...74)(:string, 0)]),
+       nil,
+       nil,
+       0,
+       "puts"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_iter_call_no_parens.txt b/test/yarp/snapshots/seattlerb/parse_line_iter_call_no_parens.txt
new file mode 100644
index 0000000000..53c7b38660
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_iter_call_no_parens.txt
@@ -0,0 +1,50 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CallNode(0...25)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...3)(
+         [CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       BlockNode(4...25)(
+         [:x, :y],
+         BlockParametersNode(7...13)(
+           ParametersNode(8...12)(
+             [RequiredParameterNode(8...9)(:x),
+              RequiredParameterNode(11...12)(:y)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (7...8),
+           (12...13)
+         ),
+         StatementsNode(16...21)(
+           [CallNode(16...21)(
+              LocalVariableReadNode(16...17)(:x, 0),
+              nil,
+              (18...19),
+              nil,
+              ArgumentsNode(20...21)([LocalVariableReadNode(20...21)(:y, 0)]),
+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (4...6),
+         (22...25)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_iter_call_parens.txt b/test/yarp/snapshots/seattlerb/parse_line_iter_call_parens.txt
new file mode 100644
index 0000000000..229243ea66
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_iter_call_parens.txt
@@ -0,0 +1,50 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CallNode(0...26)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...3)(
+         [CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "a")]
+       ),
+       (3...4),
+       BlockNode(5...26)(
+         [:x, :y],
+         BlockParametersNode(8...14)(
+           ParametersNode(9...13)(
+             [RequiredParameterNode(9...10)(:x),
+              RequiredParameterNode(12...13)(:y)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (8...9),
+           (13...14)
+         ),
+         StatementsNode(17...22)(
+           [CallNode(17...22)(
+              LocalVariableReadNode(17...18)(:x, 0),
+              nil,
+              (19...20),
+              nil,
+              ArgumentsNode(21...22)([LocalVariableReadNode(21...22)(:y, 0)]),
+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (5...7),
+         (23...26)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_multiline_str.txt b/test/yarp/snapshots/seattlerb/parse_line_multiline_str.txt
new file mode 100644
index 0000000000..e12f68cfb2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_multiline_str.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [StringNode(0...5)((0...1), (1...4), (4...5), "a\n" + "b"),
+     IntegerNode(6...7)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_multiline_str_literal_n.txt b/test/yarp/snapshots/seattlerb/parse_line_multiline_str_literal_n.txt
new file mode 100644
index 0000000000..92a7b9fed1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_multiline_str_literal_n.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [StringNode(0...6)((0...1), (1...5), (5...6), "a\n" + "b"),
+     IntegerNode(7...8)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_newlines.txt b/test/yarp/snapshots/seattlerb/parse_line_newlines.txt
new file mode 100644
index 0000000000..14b0c8cecc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_newlines.txt
@@ -0,0 +1 @@
+ProgramNode(0...4)([], StatementsNode(0...4)([TrueNode(0...4)()]))
diff --git a/test/yarp/snapshots/seattlerb/parse_line_op_asgn.txt b/test/yarp/snapshots/seattlerb/parse_line_op_asgn.txt
new file mode 100644
index 0000000000..e65af5c08d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_op_asgn.txt
@@ -0,0 +1,13 @@
+ProgramNode(6...34)(
+  [:foo],
+  StatementsNode(6...34)(
+    [LocalVariableOperatorWriteNode(6...24)(
+       (6...9),
+       (10...12),
+       CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "bar"),
+       :foo,
+       :+
+     ),
+     CallNode(31...34)(nil, nil, (31...34), nil, nil, nil, nil, 0, "baz")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_postexe.txt b/test/yarp/snapshots/seattlerb/parse_line_postexe.txt
new file mode 100644
index 0000000000..775d209272
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_postexe.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [PostExecutionNode(0...11)(
+       StatementsNode(6...9)(
+         [CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (0...3),
+       (4...5),
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_preexe.txt b/test/yarp/snapshots/seattlerb/parse_line_preexe.txt
new file mode 100644
index 0000000000..59ede98b60
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_preexe.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [PreExecutionNode(0...13)(
+       StatementsNode(8...11)(
+         [CallNode(8...11)(nil, nil, (8...11), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (0...5),
+       (6...7),
+       (12...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_rescue.txt b/test/yarp/snapshots/seattlerb/parse_line_rescue.txt
new file mode 100644
index 0000000000..1a1fc6b01d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_rescue.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...35)(
+  [],
+  StatementsNode(0...35)(
+    [BeginNode(0...35)(
+       (0...5),
+       StatementsNode(8...9)(
+         [CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "a")]
+       ),
+       RescueNode(10...31)(
+         (10...16),
+         [],
+         nil,
+         nil,
+         StatementsNode(19...20)(
+           [CallNode(19...20)(nil, nil, (19...20), nil, nil, nil, nil, 0, "b")]
+         ),
+         RescueNode(21...31)(
+           (21...27),
+           [],
+           nil,
+           nil,
+           StatementsNode(30...31)(
+             [CallNode(30...31)(
+                nil,
+                nil,
+                (30...31),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "c"
+              )]
+           ),
+           nil
+         )
+       ),
+       nil,
+       nil,
+       (32...35)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_return.txt b/test/yarp/snapshots/seattlerb/parse_line_return.txt
new file mode 100644
index 0000000000..17ba7af0a5
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_return.txt
@@ -0,0 +1,31 @@
+ProgramNode(6...77)(
+  [],
+  StatementsNode(6...77)(
+    [DefNode(6...77)(
+       (10...14),
+       nil,
+       nil,
+       StatementsNode(23...67)(
+         [IfNode(23...67)(
+            (23...25),
+            TrueNode(26...30)(),
+            StatementsNode(46...55)(
+              [ReturnNode(46...55)(
+                 (46...52),
+                 ArgumentsNode(53...55)([IntegerNode(53...55)()])
+               )]
+            ),
+            nil,
+            (64...67)
+          )]
+       ),
+       [],
+       (6...9),
+       nil,
+       nil,
+       nil,
+       nil,
+       (74...77)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_str_with_newline_escape.txt b/test/yarp/snapshots/seattlerb/parse_line_str_with_newline_escape.txt
new file mode 100644
index 0000000000..e75463a0e3
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_str_with_newline_escape.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...12)(
+         [StringNode(2...6)((2...3), (3...5), (5...6), "\n"),
+          TrueNode(8...12)()]
+       ),
+       (12...13),
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_to_ary.txt b/test/yarp/snapshots/seattlerb/parse_line_to_ary.txt
new file mode 100644
index 0000000000..da2c3f5b23
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_to_ary.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...10)(
+  [:a, :b],
+  StatementsNode(0...10)(
+    [MultiWriteNode(0...8)(
+       [LocalVariableWriteNode(0...1)(:a, 0, nil, (0...1), nil),
+        LocalVariableWriteNode(3...4)(:b, 0, nil, (3...4), nil)],
+       (5...6),
+       CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "c"),
+       nil,
+       nil
+     ),
+     CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "d")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_line_trailing_newlines.txt b/test/yarp/snapshots/seattlerb/parse_line_trailing_newlines.txt
new file mode 100644
index 0000000000..c28a53ddc8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_line_trailing_newlines.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)(
+    [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+     CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_opt_call_args_assocs_comma.txt b/test/yarp/snapshots/seattlerb/parse_opt_call_args_assocs_comma.txt
new file mode 100644
index 0000000000..9a84d358bc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_opt_call_args_assocs_comma.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       IntegerNode(0...1)(),
+       nil,
+       (1...8),
+       (1...2),
+       ArgumentsNode(2...6)(
+         [KeywordHashNode(2...6)(
+            [AssocNode(2...6)(
+               IntegerNode(2...3)(),
+               IntegerNode(5...6)(),
+               (3...5)
+             )]
+          )]
+       ),
+       (7...8),
+       nil,
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_opt_call_args_lit_comma.txt b/test/yarp/snapshots/seattlerb/parse_opt_call_args_lit_comma.txt
new file mode 100644
index 0000000000..a058d01284
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_opt_call_args_lit_comma.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       IntegerNode(0...1)(),
+       nil,
+       (1...5),
+       (1...2),
+       ArgumentsNode(2...3)([IntegerNode(2...3)()]),
+       (4...5),
+       nil,
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_019.txt b/test/yarp/snapshots/seattlerb/parse_pattern_019.txt
new file mode 100644
index 0000000000..0b31742498
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_019.txt
@@ -0,0 +1,32 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CaseNode(0...26)(
+       IntegerNode(5...6)(),
+       [InNode(7...22)(
+          RangeNode(10...15)(
+            CallNode(10...12)(
+              IntegerNode(11...12)(),
+              nil,
+              (10...11),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "-@"
+            ),
+            IntegerNode(14...15)(),
+            (12...14),
+            0
+          ),
+          StatementsNode(18...22)([TrueNode(18...22)()]),
+          (7...9),
+          nil
+        )],
+       nil,
+       (0...4),
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_044.txt b/test/yarp/snapshots/seattlerb/parse_pattern_044.txt
new file mode 100644
index 0000000000..572197b776
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_044.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CaseNode(0...31)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "obj"),
+       [InNode(9...27)(
+          ArrayPatternNode(12...20)(
+            ConstantReadNode(12...18)(),
+            [],
+            nil,
+            [],
+            (18...19),
+            (19...20)
+          ),
+          StatementsNode(23...27)([TrueNode(23...27)()]),
+          (9...11),
+          nil
+        )],
+       nil,
+       (0...4),
+       (28...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_051.txt b/test/yarp/snapshots/seattlerb/parse_pattern_051.txt
new file mode 100644
index 0000000000..7f2410212d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_051.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...36)(
+  [],
+  StatementsNode(0...36)(
+    [CaseNode(0...36)(
+       ArrayNode(5...14)(
+         [IntegerNode(6...7)(), IntegerNode(9...10)(), IntegerNode(12...13)()],
+         (5...6),
+         (13...14)
+       ),
+       [InNode(15...32)(
+          ArrayPatternNode(18...25)(
+            nil,
+            [IntegerNode(19...20)(), IntegerNode(22...23)()],
+            nil,
+            [],
+            (18...19),
+            (24...25)
+          ),
+          StatementsNode(28...32)([TrueNode(28...32)()]),
+          (15...17),
+          nil
+        )],
+       nil,
+       (0...4),
+       (33...36)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_058.txt b/test/yarp/snapshots/seattlerb/parse_pattern_058.txt
new file mode 100644
index 0000000000..23b0ba5d10
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_058.txt
@@ -0,0 +1,46 @@
+ProgramNode(0...43)(
+  [:a, :rest],
+  StatementsNode(0...43)(
+    [CaseNode(0...43)(
+       HashNode(5...11)(
+         (5...6),
+         [AssocNode(6...10)(
+            SymbolNode(6...8)(nil, (6...7), (7...8), "a"),
+            IntegerNode(9...10)(),
+            nil
+          )],
+         (10...11)
+       ),
+       [InNode(12...39)(
+          HashPatternNode(15...27)(
+            nil,
+            [AssocNode(16...18)(
+               SymbolNode(16...18)(nil, (16...17), (17...18), "a"),
+               nil,
+               nil
+             ),
+             AssocSplatNode(20...26)(
+               LocalVariableWriteNode(22...26)(:rest, 0, nil, (22...26), nil),
+               (20...22)
+             )],
+            nil,
+            (15...16),
+            (26...27)
+          ),
+          StatementsNode(30...39)(
+            [ArrayNode(30...39)(
+               [LocalVariableReadNode(31...32)(:a, 0),
+                LocalVariableReadNode(34...38)(:rest, 0)],
+               (30...31),
+               (38...39)
+             )]
+          ),
+          (12...14),
+          nil
+        )],
+       nil,
+       (0...4),
+       (40...43)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_058_2.txt b/test/yarp/snapshots/seattlerb/parse_pattern_058_2.txt
new file mode 100644
index 0000000000..c1ba037a62
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_058_2.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...33)(
+  [:a],
+  StatementsNode(0...33)(
+    [CaseNode(0...33)(
+       HashNode(5...11)(
+         (5...6),
+         [AssocNode(6...10)(
+            SymbolNode(6...8)(nil, (6...7), (7...8), "a"),
+            IntegerNode(9...10)(),
+            nil
+          )],
+         (10...11)
+       ),
+       [InNode(12...29)(
+          HashPatternNode(15...23)(
+            nil,
+            [AssocNode(16...18)(
+               SymbolNode(16...18)(nil, (16...17), (17...18), "a"),
+               nil,
+               nil
+             ),
+             AssocSplatNode(20...22)(nil, (20...22))],
+            nil,
+            (15...16),
+            (22...23)
+          ),
+          StatementsNode(26...29)(
+            [ArrayNode(26...29)(
+               [LocalVariableReadNode(27...28)(:a, 0)],
+               (26...27),
+               (28...29)
+             )]
+          ),
+          (12...14),
+          nil
+        )],
+       nil,
+       (0...4),
+       (30...33)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_069.txt b/test/yarp/snapshots/seattlerb/parse_pattern_069.txt
new file mode 100644
index 0000000000..1d3772e93f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_069.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CaseNode(0...31)(
+       SymbolNode(5...7)((5...6), (6...7), nil, "a"),
+       [InNode(8...27)(
+          HashPatternNode(11...23)(
+            ConstantReadNode(11...17)(),
+            [AssocNode(18...22)(
+               SymbolNode(18...20)(nil, (18...19), (19...20), "b"),
+               IntegerNode(21...22)(),
+               nil
+             )],
+            nil,
+            (17...18),
+            (22...23)
+          ),
+          StatementsNode(26...27)([IntegerNode(26...27)()]),
+          (8...10),
+          nil
+        )],
+       nil,
+       (0...4),
+       (28...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_pattern_076.txt b/test/yarp/snapshots/seattlerb/parse_pattern_076.txt
new file mode 100644
index 0000000000..493223169b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_pattern_076.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...39)(
+  [],
+  StatementsNode(0...39)(
+    [CaseNode(0...39)(
+       HashNode(5...11)(
+         (5...6),
+         [AssocNode(6...10)(
+            SymbolNode(6...8)(nil, (6...7), (7...8), "a"),
+            IntegerNode(9...10)(),
+            nil
+          )],
+         (10...11)
+       ),
+       [InNode(12...35)(
+          HashPatternNode(15...28)(
+            nil,
+            [AssocNode(16...20)(
+               SymbolNode(16...18)(nil, (16...17), (17...18), "a"),
+               IntegerNode(19...20)(),
+               nil
+             ),
+             NoKeywordsParameterNode(22...27)((22...24), (24...27))],
+            nil,
+            (15...16),
+            (27...28)
+          ),
+          StatementsNode(31...35)([TrueNode(31...35)()]),
+          (12...14),
+          nil
+        )],
+       nil,
+       (0...4),
+       (36...39)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_until_not_canonical.txt b/test/yarp/snapshots/seattlerb/parse_until_not_canonical.txt
new file mode 100644
index 0000000000..6ac4c6f042
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_until_not_canonical.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [UntilNode(0...30)(
+       (0...5),
+       CallNode(6...18)(
+         CallNode(10...18)(
+           CallNode(10...13)(
+             nil,
+             nil,
+             (10...13),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "var"
+           ),
+           (13...14),
+           (14...18),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "nil?"
+         ),
+         nil,
+         (6...9),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       StatementsNode(21...26)(
+         [StringNode(21...26)((21...22), (22...25), (25...26), "foo")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_until_not_noncanonical.txt b/test/yarp/snapshots/seattlerb/parse_until_not_noncanonical.txt
new file mode 100644
index 0000000000..6ac4c6f042
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_until_not_noncanonical.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [UntilNode(0...30)(
+       (0...5),
+       CallNode(6...18)(
+         CallNode(10...18)(
+           CallNode(10...13)(
+             nil,
+             nil,
+             (10...13),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "var"
+           ),
+           (13...14),
+           (14...18),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "nil?"
+         ),
+         nil,
+         (6...9),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       StatementsNode(21...26)(
+         [StringNode(21...26)((21...22), (22...25), (25...26), "foo")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_while_not_canonical.txt b/test/yarp/snapshots/seattlerb/parse_while_not_canonical.txt
new file mode 100644
index 0000000000..754694cefe
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_while_not_canonical.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [WhileNode(0...30)(
+       (0...5),
+       CallNode(6...18)(
+         CallNode(10...18)(
+           CallNode(10...13)(
+             nil,
+             nil,
+             (10...13),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "var"
+           ),
+           (13...14),
+           (14...18),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "nil?"
+         ),
+         nil,
+         (6...9),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       StatementsNode(21...26)(
+         [StringNode(21...26)((21...22), (22...25), (25...26), "foo")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/parse_while_not_noncanonical.txt b/test/yarp/snapshots/seattlerb/parse_while_not_noncanonical.txt
new file mode 100644
index 0000000000..754694cefe
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/parse_while_not_noncanonical.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [WhileNode(0...30)(
+       (0...5),
+       CallNode(6...18)(
+         CallNode(10...18)(
+           CallNode(10...13)(
+             nil,
+             nil,
+             (10...13),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "var"
+           ),
+           (13...14),
+           (14...18),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "nil?"
+         ),
+         nil,
+         (6...9),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       StatementsNode(21...26)(
+         [StringNode(21...26)((21...22), (22...25), (25...26), "foo")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/pctW_lineno.txt b/test/yarp/snapshots/seattlerb/pctW_lineno.txt
new file mode 100644
index 0000000000..c9ed993026
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/pctW_lineno.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [ArrayNode(0...28)(
+       [StringNode(3...7)(nil, (3...7), nil, "a\n" + "b"),
+        StringNode(8...9)(nil, (8...9), nil, "c"),
+        StringNode(10...11)(nil, (10...11), nil, "d"),
+        StringNode(12...16)(nil, (12...16), nil, "e\n" + "f"),
+        StringNode(17...19)(nil, (17...19), nil, "gy"),
+        StringNode(20...23)(nil, (20...23), nil, "hy"),
+        StringNode(24...27)(nil, (24...27), nil, "iy")],
+       (0...3),
+       (27...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/pct_Q_backslash_nl.txt b/test/yarp/snapshots/seattlerb/pct_Q_backslash_nl.txt
new file mode 100644
index 0000000000..f8e3421ee4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/pct_Q_backslash_nl.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)([StringNode(0...7)((0...3), (3...6), (6...7), " \n")])
+)
diff --git a/test/yarp/snapshots/seattlerb/pct_nl.txt b/test/yarp/snapshots/seattlerb/pct_nl.txt
new file mode 100644
index 0000000000..8435c33e6a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/pct_nl.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...7)(
+  [:x],
+  StatementsNode(0...7)(
+    [LocalVariableWriteNode(0...7)(
+       :x,
+       0,
+       StringNode(4...7)((4...6), (6...6), (6...7), ""),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/pipe_semicolon.txt b/test/yarp/snapshots/seattlerb/pipe_semicolon.txt
new file mode 100644
index 0000000000..912eef6176
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/pipe_semicolon.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallNode(0...18)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...18)(
+         [:c],
+         BlockParametersNode(7...14)(nil, [(11...12)], (7...8), (13...14)),
+         nil,
+         (4...6),
+         (15...18)
+       ),
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/pipe_space.txt b/test/yarp/snapshots/seattlerb/pipe_space.txt
new file mode 100644
index 0000000000..dc569222e1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/pipe_space.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...14)(
+         [],
+         BlockParametersNode(7...10)(nil, [], (7...8), (9...10)),
+         nil,
+         (4...6),
+         (11...14)
+       ),
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/qWords_space.txt b/test/yarp/snapshots/seattlerb/qWords_space.txt
new file mode 100644
index 0000000000..6713c4ba71
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qWords_space.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)([ArrayNode(0...5)([], (0...3), (4...5))])
+)
diff --git a/test/yarp/snapshots/seattlerb/qsymbols.txt b/test/yarp/snapshots/seattlerb/qsymbols.txt
new file mode 100644
index 0000000000..7cf54611c2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qsymbols.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [ArrayNode(0...9)(
+       [SymbolNode(3...4)(nil, (3...4), nil, "a"),
+        SymbolNode(5...6)(nil, (5...6), nil, "b"),
+        SymbolNode(7...8)(nil, (7...8), nil, "c")],
+       (0...3),
+       (8...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/qsymbols_empty.txt b/test/yarp/snapshots/seattlerb/qsymbols_empty.txt
new file mode 100644
index 0000000000..cad298895b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qsymbols_empty.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)([ArrayNode(0...4)([], (0...3), (3...4))])
+)
diff --git a/test/yarp/snapshots/seattlerb/qsymbols_empty_space.txt b/test/yarp/snapshots/seattlerb/qsymbols_empty_space.txt
new file mode 100644
index 0000000000..6713c4ba71
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qsymbols_empty_space.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)([ArrayNode(0...5)([], (0...3), (4...5))])
+)
diff --git a/test/yarp/snapshots/seattlerb/qsymbols_interp.txt b/test/yarp/snapshots/seattlerb/qsymbols_interp.txt
new file mode 100644
index 0000000000..2f4a44fc23
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qsymbols_interp.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [ArrayNode(0...15)(
+       [SymbolNode(3...4)(nil, (3...4), nil, "a"),
+        InterpolatedSymbolNode(5...12)(
+          nil,
+          [StringNode(5...6)(nil, (5...6), nil, "b"),
+           EmbeddedStatementsNode(6...12)(
+             (6...8),
+             StatementsNode(8...11)(
+               [CallNode(8...11)(
+                  IntegerNode(8...9)(),
+                  nil,
+                  (9...10),
+                  nil,
+                  ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+                  nil,
+                  nil,
+                  0,
+                  "+"
+                )]
+             ),
+             (11...12)
+           )],
+          nil
+        ),
+        SymbolNode(13...14)(nil, (13...14), nil, "c")],
+       (0...3),
+       (14...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/quoted_symbol_hash_arg.txt b/test/yarp/snapshots/seattlerb/quoted_symbol_hash_arg.txt
new file mode 100644
index 0000000000..861fcaa6a2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/quoted_symbol_hash_arg.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       ArgumentsNode(5...12)(
+         [KeywordHashNode(5...12)(
+            [AssocNode(5...12)(
+               SymbolNode(5...9)((5...6), (6...7), (7...9), "a"),
+               HashNode(10...12)((10...11), [], (11...12)),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "puts"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/quoted_symbol_keys.txt b/test/yarp/snapshots/seattlerb/quoted_symbol_keys.txt
new file mode 100644
index 0000000000..59b2b5d62d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/quoted_symbol_keys.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [HashNode(0...11)(
+       (0...1),
+       [AssocNode(2...9)(
+          SymbolNode(2...6)((2...3), (3...4), (4...6), "a"),
+          SymbolNode(7...9)((7...8), (8...9), nil, "b"),
+          nil
+        )],
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/qw_escape.txt b/test/yarp/snapshots/seattlerb/qw_escape.txt
new file mode 100644
index 0000000000..0bf3fd8d8b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qw_escape.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [StringNode(0...7)((0...3), (3...6), (6...7), "\u0001'")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/qw_escape_term.txt b/test/yarp/snapshots/seattlerb/qw_escape_term.txt
new file mode 100644
index 0000000000..2c9eb48c3d
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qw_escape_term.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [StringNode(0...26)(
+       (0...3),
+       (3...25),
+       (25...26),
+       "blah blah \\| blah blah"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/qwords_empty.txt b/test/yarp/snapshots/seattlerb/qwords_empty.txt
new file mode 100644
index 0000000000..cad298895b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/qwords_empty.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)([ArrayNode(0...4)([], (0...3), (3...4))])
+)
diff --git a/test/yarp/snapshots/seattlerb/read_escape_unicode_curlies.txt b/test/yarp/snapshots/seattlerb/read_escape_unicode_curlies.txt
new file mode 100644
index 0000000000..26583c05a1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/read_escape_unicode_curlies.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)([StringNode(0...9)((0...1), (1...9), nil, " ")])
+)
diff --git a/test/yarp/snapshots/seattlerb/read_escape_unicode_h4.txt b/test/yarp/snapshots/seattlerb/read_escape_unicode_h4.txt
new file mode 100644
index 0000000000..b17128c620
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/read_escape_unicode_h4.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)([StringNode(0...7)((0...1), (1...7), nil, " ")])
+)
diff --git a/test/yarp/snapshots/seattlerb/regexp.txt b/test/yarp/snapshots/seattlerb/regexp.txt
new file mode 100644
index 0000000000..122d26a249
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/regexp.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...45)(
+  [],
+  StatementsNode(0...45)(
+    [RegularExpressionNode(0...5)((0...1), (1...4), (4...5), "wtf", 0),
+     RegularExpressionNode(7...13)((7...8), (8...11), (11...13), "wtf", 2),
+     RegularExpressionNode(15...21)(
+       (15...16),
+       (16...19),
+       (19...21),
+       "wtf",
+       16
+     ),
+     RegularExpressionNode(23...30)(
+       (23...24),
+       (24...27),
+       (27...30),
+       "wtf",
+       18
+     ),
+     RegularExpressionNode(32...45)(
+       (32...33),
+       (33...36),
+       (36...45),
+       "wtf",
+       18
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/regexp_esc_C_slash.txt b/test/yarp/snapshots/seattlerb/regexp_esc_C_slash.txt
new file mode 100644
index 0000000000..2605080304
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/regexp_esc_C_slash.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [RegularExpressionNode(0...7)((0...1), (1...6), (6...7), "\u0003d", 0)]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/regexp_esc_u.txt b/test/yarp/snapshots/seattlerb/regexp_esc_u.txt
new file mode 100644
index 0000000000..8b13368704
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/regexp_esc_u.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [RegularExpressionNode(0...17)((0...1), (1...16), (16...17), "[!-']", 0)]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/regexp_escape_extended.txt b/test/yarp/snapshots/seattlerb/regexp_escape_extended.txt
new file mode 100644
index 0000000000..699de5a196
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/regexp_escape_extended.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [RegularExpressionNode(0...6)((0...1), (1...5), (5...6), "“", 0)]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/regexp_unicode_curlies.txt b/test/yarp/snapshots/seattlerb/regexp_unicode_curlies.txt
new file mode 100644
index 0000000000..e4502db3f7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/regexp_unicode_curlies.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [RegularExpressionNode(0...15)((0...1), (1...14), (14...15), "샞몾", 0),
+     RegularExpressionNode(17...25)((17...18), (18...24), (24...25), "ß", 0)]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/required_kwarg_no_value.txt b/test/yarp/snapshots/seattlerb/required_kwarg_no_value.txt
new file mode 100644
index 0000000000..95cf0e279a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/required_kwarg_no_value.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [DefNode(0...16)(
+       (4...5),
+       nil,
+       ParametersNode(6...12)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...8)((6...8), nil),
+          KeywordParameterNode(10...12)((10...12), nil)],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :b],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (13...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rescue_do_end_ensure_result.txt b/test/yarp/snapshots/seattlerb/rescue_do_end_ensure_result.txt
new file mode 100644
index 0000000000..52721053a8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rescue_do_end_ensure_result.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [CallNode(0...42)(
+       CallNode(0...37)(
+         nil,
+         nil,
+         (0...4),
+         nil,
+         nil,
+         nil,
+         BlockNode(5...37)(
+           [],
+           nil,
+           BeginNode(10...37)(
+             nil,
+             StatementsNode(10...16)(
+               [SymbolNode(10...16)((10...11), (11...16), nil, "begin")]
+             ),
+             nil,
+             nil,
+             EnsureNode(17...37)(
+               (17...23),
+               StatementsNode(26...33)(
+                 [SymbolNode(26...33)((26...27), (27...33), nil, "ensure")]
+               ),
+               (34...37)
+             ),
+             (34...37)
+           ),
+           (5...7),
+           (34...37)
+         ),
+         0,
+         "proc"
+       ),
+       (37...38),
+       (38...42),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "call"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rescue_do_end_no_raise.txt b/test/yarp/snapshots/seattlerb/rescue_do_end_no_raise.txt
new file mode 100644
index 0000000000..c4d46c2f7a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rescue_do_end_no_raise.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...66)(
+  [],
+  StatementsNode(0...66)(
+    [CallNode(0...66)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...66)(
+         [],
+         nil,
+         BeginNode(9...66)(
+           nil,
+           StatementsNode(9...15)(
+             [SymbolNode(9...15)((9...10), (10...15), nil, "begin")]
+           ),
+           RescueNode(16...32)(
+             (16...22),
+             [],
+             nil,
+             nil,
+             StatementsNode(25...32)(
+               [SymbolNode(25...32)((25...26), (26...32), nil, "rescue")]
+             ),
+             nil
+           ),
+           ElseNode(33...52)(
+             (33...37),
+             StatementsNode(40...45)(
+               [SymbolNode(40...45)((40...41), (41...45), nil, "else")]
+             ),
+             (46...52)
+           ),
+           EnsureNode(46...66)(
+             (46...52),
+             StatementsNode(55...62)(
+               [SymbolNode(55...62)((55...56), (56...62), nil, "ensure")]
+             ),
+             (63...66)
+           ),
+           (63...66)
+         ),
+         (4...6),
+         (63...66)
+       ),
+       0,
+       "tap"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rescue_do_end_raised.txt b/test/yarp/snapshots/seattlerb/rescue_do_end_raised.txt
new file mode 100644
index 0000000000..7209e7eb47
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rescue_do_end_raised.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...35)(
+  [],
+  StatementsNode(0...35)(
+    [CallNode(0...35)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...35)(
+         [],
+         nil,
+         BeginNode(9...35)(
+           nil,
+           StatementsNode(9...14)(
+             [CallNode(9...14)(
+                nil,
+                nil,
+                (9...14),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "raise"
+              )]
+           ),
+           nil,
+           nil,
+           EnsureNode(15...35)(
+             (15...21),
+             StatementsNode(24...31)(
+               [SymbolNode(24...31)((24...25), (25...31), nil, "ensure")]
+             ),
+             (32...35)
+           ),
+           (32...35)
+         ),
+         (4...6),
+         (32...35)
+       ),
+       0,
+       "tap"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rescue_do_end_rescued.txt b/test/yarp/snapshots/seattlerb/rescue_do_end_rescued.txt
new file mode 100644
index 0000000000..07d7a0aa6a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rescue_do_end_rescued.txt
@@ -0,0 +1,62 @@
+ProgramNode(0...65)(
+  [],
+  StatementsNode(0...65)(
+    [CallNode(0...65)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...65)(
+         [],
+         nil,
+         BeginNode(9...65)(
+           nil,
+           StatementsNode(9...14)(
+             [CallNode(9...14)(
+                nil,
+                nil,
+                (9...14),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "raise"
+              )]
+           ),
+           RescueNode(15...31)(
+             (15...21),
+             [],
+             nil,
+             nil,
+             StatementsNode(24...31)(
+               [SymbolNode(24...31)((24...25), (25...31), nil, "rescue")]
+             ),
+             nil
+           ),
+           ElseNode(32...51)(
+             (32...36),
+             StatementsNode(39...44)(
+               [SymbolNode(39...44)((39...40), (40...44), nil, "else")]
+             ),
+             (45...51)
+           ),
+           EnsureNode(45...65)(
+             (45...51),
+             StatementsNode(54...61)(
+               [SymbolNode(54...61)((54...55), (55...61), nil, "ensure")]
+             ),
+             (62...65)
+           ),
+           (62...65)
+         ),
+         (4...6),
+         (62...65)
+       ),
+       0,
+       "tap"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rescue_in_block.txt b/test/yarp/snapshots/seattlerb/rescue_in_block.txt
new file mode 100644
index 0000000000..0a9d040814
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rescue_in_block.txt
@@ -0,0 +1,48 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CallNode(0...26)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       nil,
+       nil,
+       BlockNode(5...26)(
+         [],
+         nil,
+         BeginNode(8...26)(
+           nil,
+           nil,
+           RescueNode(8...22)(
+             (8...14),
+             [],
+             nil,
+             nil,
+             StatementsNode(17...22)(
+               [CallNode(17...22)(
+                  nil,
+                  nil,
+                  (17...22),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "stuff"
+                )]
+             ),
+             nil
+           ),
+           nil,
+           nil,
+           (23...26)
+         ),
+         (5...7),
+         (23...26)
+       ),
+       0,
+       "blah"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rescue_parens.txt b/test/yarp/snapshots/seattlerb/rescue_parens.txt
new file mode 100644
index 0000000000..f7f6a7783e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rescue_parens.txt
@@ -0,0 +1,48 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...14)(
+         [ParenthesesNode(2...14)(
+            StatementsNode(3...13)(
+              [RescueModifierNode(3...13)(
+                 CallNode(3...4)(
+                   nil,
+                   nil,
+                   (3...4),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "b"
+                 ),
+                 (5...11),
+                 CallNode(12...13)(
+                   nil,
+                   nil,
+                   (12...13),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "c"
+                 )
+               )]
+            ),
+            (2...3),
+            (13...14)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/return_call_assocs.txt b/test/yarp/snapshots/seattlerb/return_call_assocs.txt
new file mode 100644
index 0000000000..72edbbbfa4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/return_call_assocs.txt
@@ -0,0 +1,142 @@
+ProgramNode(0...106)(
+  [],
+  StatementsNode(0...106)(
+    [ReturnNode(0...17)(
+       (0...6),
+       ArgumentsNode(7...17)(
+         [IntegerNode(7...8)(),
+          KeywordHashNode(10...17)(
+            [AssocNode(10...17)(
+               SymbolNode(10...12)((10...11), (11...12), nil, "z"),
+               IntegerNode(16...17)(),
+               (13...15)
+             )]
+          )]
+       )
+     ),
+     ReturnNode(19...45)(
+       (19...25),
+       ArgumentsNode(26...45)(
+         [IntegerNode(26...27)(),
+          KeywordHashNode(29...45)(
+            [AssocNode(29...36)(
+               SymbolNode(29...31)((29...30), (30...31), nil, "z"),
+               IntegerNode(35...36)(),
+               (32...34)
+             ),
+             AssocNode(38...45)(
+               SymbolNode(38...40)((38...39), (39...40), nil, "w"),
+               IntegerNode(44...45)(),
+               (41...43)
+             )]
+          )]
+       )
+     ),
+     ReturnNode(47...61)(
+       (47...53),
+       ArgumentsNode(54...61)(
+         [CallNode(54...61)(
+            nil,
+            nil,
+            (54...55),
+            nil,
+            ArgumentsNode(56...61)(
+              [KeywordHashNode(56...61)(
+                 [AssocNode(56...61)(
+                    SymbolNode(56...58)((56...57), (57...58), nil, "z"),
+                    IntegerNode(60...61)(),
+                    (58...60)
+                  )]
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "y"
+          )]
+       )
+     ),
+     ReturnNode(63...75)(
+       (63...69),
+       ArgumentsNode(70...75)(
+         [CallNode(70...75)(
+            nil,
+            nil,
+            (70...71),
+            nil,
+            ArgumentsNode(72...75)(
+              [KeywordHashNode(72...75)(
+                 [AssocNode(72...75)(
+                    SymbolNode(72...74)(nil, (72...73), (73...74), "z"),
+                    IntegerNode(74...75)(),
+                    nil
+                  )]
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "y"
+          )]
+       )
+     ),
+     ReturnNode(77...90)(
+       (77...83),
+       ArgumentsNode(84...90)(
+         [CallNode(84...90)(
+            nil,
+            nil,
+            (84...85),
+            (85...86),
+            ArgumentsNode(86...89)(
+              [KeywordHashNode(86...89)(
+                 [AssocNode(86...89)(
+                    SymbolNode(86...88)(nil, (86...87), (87...88), "z"),
+                    IntegerNode(88...89)(),
+                    nil
+                  )]
+               )]
+            ),
+            (89...90),
+            nil,
+            0,
+            "y"
+          )]
+       )
+     ),
+     ReturnNode(92...106)(
+       (92...98),
+       ArgumentsNode(99...106)(
+         [CallNode(99...106)(
+            nil,
+            nil,
+            (99...100),
+            (100...101),
+            ArgumentsNode(101...105)(
+              [KeywordHashNode(101...105)(
+                 [AssocNode(101...105)(
+                    CallNode(101...102)(
+                      nil,
+                      nil,
+                      (101...102),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "z"
+                    ),
+                    IntegerNode(104...105)(),
+                    (102...104)
+                  )]
+               )]
+            ),
+            (105...106),
+            nil,
+            0,
+            "y"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/rhs_asgn.txt b/test/yarp/snapshots/seattlerb/rhs_asgn.txt
new file mode 100644
index 0000000000..7ba161b170
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/rhs_asgn.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...7)(
+  [:n],
+  StatementsNode(0...7)(
+    [MatchRequiredNode(0...7)(
+       IntegerNode(0...2)(),
+       LocalVariableWriteNode(6...7)(:n, 0, nil, (6...7), nil),
+       (3...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/ruby21_numbers.txt b/test/yarp/snapshots/seattlerb/ruby21_numbers.txt
new file mode 100644
index 0000000000..f250397d15
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/ruby21_numbers.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [ArrayNode(0...13)(
+       [ImaginaryNode(1...3)(IntegerNode(1...2)()),
+        RationalNode(5...7)(IntegerNode(5...6)()),
+        ImaginaryNode(9...12)(RationalNode(9...11)(IntegerNode(9...10)()))],
+       (0...1),
+       (12...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_attrasgn.txt b/test/yarp/snapshots/seattlerb/safe_attrasgn.txt
new file mode 100644
index 0000000000..fabbcb5ca7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_attrasgn.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       ArgumentsNode(7...8)([IntegerNode(7...8)()]),
+       nil,
+       nil,
+       1,
+       "b="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_attrasgn_constant.txt b/test/yarp/snapshots/seattlerb/safe_attrasgn_constant.txt
new file mode 100644
index 0000000000..b821504034
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_attrasgn_constant.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       ArgumentsNode(7...8)([IntegerNode(7...8)()]),
+       nil,
+       nil,
+       1,
+       "B="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_call.txt b/test/yarp/snapshots/seattlerb/safe_call.txt
new file mode 100644
index 0000000000..1621715838
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_call.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_call_after_newline.txt b/test/yarp/snapshots/seattlerb/safe_call_after_newline.txt
new file mode 100644
index 0000000000..d57c4b14f7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_call_after_newline.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (2...4),
+       (4...5),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_call_dot_parens.txt b/test/yarp/snapshots/seattlerb/safe_call_dot_parens.txt
new file mode 100644
index 0000000000..3eee73711e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_call_dot_parens.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [CallNode(0...5)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (0...0),
+       (3...4),
+       nil,
+       (4...5),
+       nil,
+       1,
+       "call"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_call_newline.txt b/test/yarp/snapshots/seattlerb/safe_call_newline.txt
new file mode 100644
index 0000000000..1621715838
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_call_newline.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_call_operator.txt b/test/yarp/snapshots/seattlerb/safe_call_operator.txt
new file mode 100644
index 0000000000..797d9795c1
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_call_operator.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       nil,
+       nil,
+       1,
+       ">"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_call_rhs_newline.txt b/test/yarp/snapshots/seattlerb/safe_call_rhs_newline.txt
new file mode 100644
index 0000000000..373fd18537
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_call_rhs_newline.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...8)(
+  [:c],
+  StatementsNode(0...8)(
+    [LocalVariableWriteNode(0...8)(
+       :c,
+       0,
+       CallNode(4...8)(
+         CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "a"),
+         (5...7),
+         (7...8),
+         nil,
+         nil,
+         nil,
+         nil,
+         1,
+         "b"
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_calls.txt b/test/yarp/snapshots/seattlerb/safe_calls.txt
new file mode 100644
index 0000000000..ef0fe5c7a8
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_calls.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...10)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         1,
+         "b"
+       ),
+       (4...6),
+       (6...7),
+       (7...8),
+       ArgumentsNode(8...9)([IntegerNode(8...9)()]),
+       (9...10),
+       nil,
+       1,
+       "c"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_op_asgn.txt b/test/yarp/snapshots/seattlerb/safe_op_asgn.txt
new file mode 100644
index 0000000000..a90eecb8fd
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_op_asgn.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallOperatorWriteNode(0...11)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         1,
+         "b="
+       ),
+       (5...7),
+       CallNode(8...11)(
+         nil,
+         nil,
+         (8...9),
+         nil,
+         ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+         nil,
+         nil,
+         0,
+         "x"
+       ),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/safe_op_asgn2.txt b/test/yarp/snapshots/seattlerb/safe_op_asgn2.txt
new file mode 100644
index 0000000000..bf00e7947b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/safe_op_asgn2.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallOperatorOrWriteNode(0...10)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         1,
+         "b="
+       ),
+       CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "x"),
+       (5...8)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/slashy_newlines_within_string.txt b/test/yarp/snapshots/seattlerb/slashy_newlines_within_string.txt
new file mode 100644
index 0000000000..fed889aa90
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/slashy_newlines_within_string.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [CallNode(0...33)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       ArgumentsNode(5...33)(
+         [StringNode(5...33)(
+            (5...6),
+            (6...32),
+            (32...33),
+            "hello\n" + " my\n" + " dear\n" + " friend"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "puts"
+     ),
+     CallNode(35...40)(
+       CallNode(35...36)(nil, nil, (35...36), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (37...38),
+       nil,
+       ArgumentsNode(39...40)(
+         [CallNode(39...40)(nil, nil, (39...40), nil, nil, nil, nil, 0, "b")]
+       ),
+       nil,
+       nil,
+       0,
+       "+"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_arg_no_paren.txt b/test/yarp/snapshots/seattlerb/stabby_arg_no_paren.txt
new file mode 100644
index 0000000000..bbbd0a3fcf
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_arg_no_paren.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [LambdaNode(0...5)(
+       [:a],
+       (0...2),
+       BlockParametersNode(2...3)(
+         ParametersNode(2...3)(
+           [RequiredParameterNode(2...3)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         nil,
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_arg_opt_splat_arg_block_omfg.txt b/test/yarp/snapshots/seattlerb/stabby_arg_opt_splat_arg_block_omfg.txt
new file mode 100644
index 0000000000..9475ba9c3f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_arg_opt_splat_arg_block_omfg.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [LambdaNode(0...23)(
+       [:b, :c, :d, :e, :f],
+       (0...2),
+       BlockParametersNode(2...21)(
+         ParametersNode(3...20)(
+           [RequiredParameterNode(3...4)(:b)],
+           [OptionalParameterNode(6...9)(
+              :c,
+              (6...7),
+              (7...8),
+              IntegerNode(8...9)()
+            )],
+           [RequiredParameterNode(15...16)(:e)],
+           RestParameterNode(11...13)((11...12), (12...13)),
+           [],
+           nil,
+           BlockParameterNode(18...20)((19...20), (18...19))
+         ),
+         [],
+         (2...3),
+         (20...21)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_block_iter_call.txt b/test/yarp/snapshots/seattlerb/stabby_block_iter_call.txt
new file mode 100644
index 0000000000..9d56711a76
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_block_iter_call.txt
@@ -0,0 +1,45 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CallNode(0...25)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...25)(
+         [LambdaNode(2...25)(
+            [],
+            (2...4),
+            BlockParametersNode(5...7)(nil, [], (5...6), (6...7)),
+            StatementsNode(11...21)(
+              [CallNode(11...21)(
+                 CallNode(11...12)(
+                   nil,
+                   nil,
+                   (11...12),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "a"
+                 ),
+                 (12...13),
+                 (13...14),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(15...21)([], nil, nil, (15...17), (18...21)),
+                 0,
+                 "b"
+               )]
+            )
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_block_iter_call_no_target_with_arg.txt b/test/yarp/snapshots/seattlerb/stabby_block_iter_call_no_target_with_arg.txt
new file mode 100644
index 0000000000..c24b3c63c7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_block_iter_call_no_target_with_arg.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CallNode(0...26)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...26)(
+         [LambdaNode(2...26)(
+            [],
+            (2...4),
+            BlockParametersNode(5...7)(nil, [], (5...6), (6...7)),
+            StatementsNode(11...22)(
+              [CallNode(11...22)(
+                 nil,
+                 nil,
+                 (11...12),
+                 (12...13),
+                 ArgumentsNode(13...14)([IntegerNode(13...14)()]),
+                 (14...15),
+                 BlockNode(16...22)([], nil, nil, (16...18), (19...22)),
+                 0,
+                 "a"
+               )]
+            )
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_block_kw.txt b/test/yarp/snapshots/seattlerb/stabby_block_kw.txt
new file mode 100644
index 0000000000..9554c9d37a
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_block_kw.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [LambdaNode(0...13)(
+       [:k],
+       (0...2),
+       BlockParametersNode(3...9)(
+         ParametersNode(4...8)(
+           [],
+           [],
+           [],
+           nil,
+           [KeywordParameterNode(4...8)((4...6), IntegerNode(6...8)())],
+           nil,
+           nil
+         ),
+         [],
+         (3...4),
+         (8...9)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_block_kw__required.txt b/test/yarp/snapshots/seattlerb/stabby_block_kw__required.txt
new file mode 100644
index 0000000000..e2bdaf8124
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_block_kw__required.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [LambdaNode(0...11)(
+       [:k],
+       (0...2),
+       BlockParametersNode(3...7)(
+         ParametersNode(4...6)(
+           [],
+           [],
+           [],
+           nil,
+           [KeywordParameterNode(4...6)((4...6), nil)],
+           nil,
+           nil
+         ),
+         [],
+         (3...4),
+         (6...7)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/stabby_proc_scope.txt b/test/yarp/snapshots/seattlerb/stabby_proc_scope.txt
new file mode 100644
index 0000000000..d8aef65941
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/stabby_proc_scope.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [LambdaNode(0...11)(
+       [:a, :b],
+       (0...2),
+       BlockParametersNode(2...8)(
+         ParametersNode(3...4)(
+           [RequiredParameterNode(3...4)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [(6...7)],
+         (2...3),
+         (7...8)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_backslashes.txt b/test/yarp/snapshots/seattlerb/str_backslashes.txt
new file mode 100644
index 0000000000..8ad6906611
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_backslashes.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...204)(
+  [],
+  StatementsNode(0...204)(
+    [CallNode(0...204)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...204)(
+         [StringNode(2...204)(
+            (2...3),
+            (3...203),
+            (203...204),
+            "\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n\\n"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_double_double_escaped_newline.txt b/test/yarp/snapshots/seattlerb/str_double_double_escaped_newline.txt
new file mode 100644
index 0000000000..fa91f00d29
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_double_double_escaped_newline.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...7)(
+         [StringNode(2...7)((2...3), (3...6), (6...7), "\\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_double_escaped_newline.txt b/test/yarp/snapshots/seattlerb/str_double_escaped_newline.txt
new file mode 100644
index 0000000000..2ff6d74fbb
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_double_escaped_newline.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...6)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...6)(
+         [StringNode(2...6)((2...3), (3...5), (5...6), "\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_double_newline.txt b/test/yarp/snapshots/seattlerb/str_double_newline.txt
new file mode 100644
index 0000000000..a8e003e997
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_double_newline.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...5)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...5)(
+         [StringNode(2...5)((2...3), (3...4), (4...5), "\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_evstr.txt b/test/yarp/snapshots/seattlerb/str_evstr.txt
new file mode 100644
index 0000000000..54cd37035f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_evstr.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [InterpolatedStringNode(0...8)(
+       (0...1),
+       [StringNode(1...3)(nil, (1...3), nil, "a "),
+        EmbeddedStatementsNode(3...7)(
+          (3...5),
+          StatementsNode(5...6)(
+            [CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "b")]
+          ),
+          (6...7)
+        )],
+       (7...8)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_evstr_escape.txt b/test/yarp/snapshots/seattlerb/str_evstr_escape.txt
new file mode 100644
index 0000000000..41b2b9e294
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_evstr_escape.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [InterpolatedStringNode(0...16)(
+       (0...1),
+       [StringNode(1...3)(nil, (1...3), nil, "a "),
+        EmbeddedStatementsNode(3...7)(
+          (3...5),
+          StatementsNode(5...6)(
+            [CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "b")]
+          ),
+          (6...7)
+        ),
+        StringNode(7...15)(nil, (7...15), nil, "½")],
+       (15...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_heredoc_interp.txt b/test/yarp/snapshots/seattlerb/str_heredoc_interp.txt
new file mode 100644
index 0000000000..3564378399
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_heredoc_interp.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [InterpolatedStringNode(0...17)(
+       (0...4),
+       [EmbeddedStatementsNode(5...9)(
+          (5...7),
+          StatementsNode(7...8)(
+            [CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "x")]
+          ),
+          (8...9)
+        ),
+        StringNode(9...16)(nil, (9...16), nil, "\n" + "blah2\n")],
+       (16...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_interp_ternary_or_label.txt b/test/yarp/snapshots/seattlerb/str_interp_ternary_or_label.txt
new file mode 100644
index 0000000000..d712ca00a4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_interp_ternary_or_label.txt
@@ -0,0 +1,89 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [InterpolatedStringNode(0...23)(
+       (0...1),
+       [EmbeddedStatementsNode(1...22)(
+          (1...3),
+          StatementsNode(3...21)(
+            [IfNode(3...21)(
+               nil,
+               CallNode(3...7)(
+                 CallNode(3...4)(
+                   nil,
+                   nil,
+                   (3...4),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "a"
+                 ),
+                 (4...5),
+                 (5...7),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "b?"
+               ),
+               StatementsNode(10...17)(
+                 [CallNode(10...17)(
+                    CallNode(10...14)(
+                      StringNode(10...12)((10...11), (11...11), (11...12), ""),
+                      nil,
+                      (12...13),
+                      nil,
+                      ArgumentsNode(13...14)(
+                        [CallNode(13...14)(
+                           nil,
+                           nil,
+                           (13...14),
+                           nil,
+                           nil,
+                           nil,
+                           nil,
+                           0,
+                           "a"
+                         )]
+                      ),
+                      nil,
+                      nil,
+                      0,
+                      "+"
+                    ),
+                    nil,
+                    (14...15),
+                    nil,
+                    ArgumentsNode(15...17)(
+                      [StringNode(15...17)(
+                         (15...16),
+                         (16...16),
+                         (16...17),
+                         ""
+                       )]
+                    ),
+                    nil,
+                    nil,
+                    0,
+                    "+"
+                  )]
+               ),
+               ElseNode(17...21)(
+                 (17...18),
+                 StatementsNode(19...21)(
+                   [StringNode(19...21)((19...20), (20...20), (20...21), "")]
+                 ),
+                 nil
+               ),
+               nil
+             )]
+          ),
+          (21...22)
+        )],
+       (22...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_lit_concat_bad_encodings.txt b/test/yarp/snapshots/seattlerb/str_lit_concat_bad_encodings.txt
new file mode 100644
index 0000000000..350cc6b6b9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_lit_concat_bad_encodings.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...131)(
+  [],
+  StatementsNode(0...131)(
+    [StringConcatNode(0...131)(
+       StringNode(0...62)(
+         (0...1),
+         (1...61),
+         (61...62),
+         "\xE3Ӌー\x83\xE3\x83コ\xA3\x82\x99"
+       ),
+       StringNode(73...131)(
+         (73...74),
+         (74...130),
+         (130...131),
+         "ンパý;foo@bar.com"
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_newline_hash_line_number.txt b/test/yarp/snapshots/seattlerb/str_newline_hash_line_number.txt
new file mode 100644
index 0000000000..e56d74eed7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_newline_hash_line_number.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [StringNode(0...11)(
+       (0...1),
+       (1...10),
+       (10...11),
+       "\n" + "\n" + "\n" + "\n" + "#"
+     ),
+     IntegerNode(12...13)()]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_pct_Q_nested.txt b/test/yarp/snapshots/seattlerb/str_pct_Q_nested.txt
new file mode 100644
index 0000000000..57b00effb7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_pct_Q_nested.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [InterpolatedStringNode(0...26)(
+       (0...3),
+       [StringNode(3...11)(nil, (3...11), nil, "before ["),
+        EmbeddedStatementsNode(11...18)(
+          (11...13),
+          StatementsNode(13...17)(
+            [CallNode(13...17)(
+               nil,
+               nil,
+               (13...17),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "nest"
+             )]
+          ),
+          (17...18)
+        ),
+        StringNode(18...25)(nil, (18...25), nil, "] after")],
+       (25...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_pct_nested_nested.txt b/test/yarp/snapshots/seattlerb/str_pct_nested_nested.txt
new file mode 100644
index 0000000000..b615b691cc
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_pct_nested_nested.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [InterpolatedStringNode(0...20)(
+       (0...2),
+       [StringNode(2...5)(nil, (2...5), nil, " { "),
+        EmbeddedStatementsNode(5...16)(
+          (5...7),
+          StatementsNode(8...14)(
+            [InterpolatedStringNode(8...14)(
+               (8...9),
+               [EmbeddedStatementsNode(9...13)(
+                  (9...11),
+                  StatementsNode(11...12)([IntegerNode(11...12)()]),
+                  (12...13)
+                )],
+               (13...14)
+             )]
+          ),
+          (15...16)
+        ),
+        StringNode(16...19)(nil, (16...19), nil, " } ")],
+       (19...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_pct_q.txt b/test/yarp/snapshots/seattlerb/str_pct_q.txt
new file mode 100644
index 0000000000..be3f92365c
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_pct_q.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [StringNode(0...9)((0...3), (3...8), (8...9), "a b c")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_single_double_escaped_newline.txt b/test/yarp/snapshots/seattlerb/str_single_double_escaped_newline.txt
new file mode 100644
index 0000000000..fa91f00d29
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_single_double_escaped_newline.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...7)(
+         [StringNode(2...7)((2...3), (3...6), (6...7), "\\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_single_escaped_newline.txt b/test/yarp/snapshots/seattlerb/str_single_escaped_newline.txt
new file mode 100644
index 0000000000..1d2b327f6b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_single_escaped_newline.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...6)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...6)(
+         [StringNode(2...6)((2...3), (3...5), (5...6), "\\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(7...8)(nil, nil, (7...8), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_single_newline.txt b/test/yarp/snapshots/seattlerb/str_single_newline.txt
new file mode 100644
index 0000000000..a8e003e997
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_single_newline.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...5)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...5)(
+         [StringNode(2...5)((2...3), (3...4), (4...5), "\n")]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b")]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_str.txt b/test/yarp/snapshots/seattlerb/str_str.txt
new file mode 100644
index 0000000000..964ac52f5f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_str.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [InterpolatedStringNode(0...10)(
+       (0...1),
+       [StringNode(1...3)(nil, (1...3), nil, "a "),
+        EmbeddedStatementsNode(3...9)(
+          (3...5),
+          StatementsNode(5...8)(
+            [StringNode(5...8)((5...6), (6...7), (7...8), "b")]
+          ),
+          (8...9)
+        )],
+       (9...10)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/str_str_str.txt b/test/yarp/snapshots/seattlerb/str_str_str.txt
new file mode 100644
index 0000000000..f7ca61b950
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/str_str_str.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [InterpolatedStringNode(0...12)(
+       (0...1),
+       [StringNode(1...3)(nil, (1...3), nil, "a "),
+        EmbeddedStatementsNode(3...9)(
+          (3...5),
+          StatementsNode(5...8)(
+            [StringNode(5...8)((5...6), (6...7), (7...8), "b")]
+          ),
+          (8...9)
+        ),
+        StringNode(9...11)(nil, (9...11), nil, " c")],
+       (11...12)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/super_arg.txt b/test/yarp/snapshots/seattlerb/super_arg.txt
new file mode 100644
index 0000000000..3885dbac14
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/super_arg.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [SuperNode(0...8)(
+       (0...5),
+       nil,
+       ArgumentsNode(6...8)([IntegerNode(6...8)()]),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/symbol_empty.txt b/test/yarp/snapshots/seattlerb/symbol_empty.txt
new file mode 100644
index 0000000000..f299d17642
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/symbol_empty.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)([SymbolNode(0...3)((0...2), (2...2), (2...3), "")])
+)
diff --git a/test/yarp/snapshots/seattlerb/symbol_list.txt b/test/yarp/snapshots/seattlerb/symbol_list.txt
new file mode 100644
index 0000000000..cfd59c4e0e
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/symbol_list.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [ArrayNode(0...13)(
+       [InterpolatedSymbolNode(3...7)(
+          nil,
+          [EmbeddedStatementsNode(3...7)(
+             (3...5),
+             StatementsNode(5...6)(
+               [CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "a")]
+             ),
+             (6...7)
+           )],
+          nil
+        ),
+        InterpolatedSymbolNode(8...12)(
+          nil,
+          [EmbeddedStatementsNode(8...12)(
+             (8...10),
+             StatementsNode(10...11)(
+               [CallNode(10...11)(
+                  nil,
+                  nil,
+                  (10...11),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "b"
+                )]
+             ),
+             (11...12)
+           )],
+          nil
+        )],
+       (0...3),
+       (12...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/symbols.txt b/test/yarp/snapshots/seattlerb/symbols.txt
new file mode 100644
index 0000000000..7cf54611c2
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/symbols.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [ArrayNode(0...9)(
+       [SymbolNode(3...4)(nil, (3...4), nil, "a"),
+        SymbolNode(5...6)(nil, (5...6), nil, "b"),
+        SymbolNode(7...8)(nil, (7...8), nil, "c")],
+       (0...3),
+       (8...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/symbols_empty.txt b/test/yarp/snapshots/seattlerb/symbols_empty.txt
new file mode 100644
index 0000000000..cad298895b
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/symbols_empty.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)([ArrayNode(0...4)([], (0...3), (3...4))])
+)
diff --git a/test/yarp/snapshots/seattlerb/symbols_empty_space.txt b/test/yarp/snapshots/seattlerb/symbols_empty_space.txt
new file mode 100644
index 0000000000..6713c4ba71
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/symbols_empty_space.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)([ArrayNode(0...5)([], (0...3), (4...5))])
+)
diff --git a/test/yarp/snapshots/seattlerb/symbols_interp.txt b/test/yarp/snapshots/seattlerb/symbols_interp.txt
new file mode 100644
index 0000000000..2aa2914312
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/symbols_interp.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [ArrayNode(0...15)(
+       [SymbolNode(3...4)(nil, (3...4), nil, "a"),
+        SymbolNode(5...12)(nil, (5...12), nil, "b\#{1+1}"),
+        SymbolNode(13...14)(nil, (13...14), nil, "c")],
+       (0...3),
+       (14...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/thingy.txt b/test/yarp/snapshots/seattlerb/thingy.txt
new file mode 100644
index 0000000000..1a1c467f47
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/thingy.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...6)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "f"),
+       (1...2),
+       (0...0),
+       (2...3),
+       ArgumentsNode(3...5)([IntegerNode(3...5)()]),
+       (5...6),
+       nil,
+       0,
+       "call"
+     ),
+     CallNode(8...15)(
+       CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "f"),
+       (9...11),
+       (0...0),
+       (11...12),
+       ArgumentsNode(12...14)([IntegerNode(12...14)()]),
+       (14...15),
+       nil,
+       0,
+       "call"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/uminus_float.txt b/test/yarp/snapshots/seattlerb/uminus_float.txt
new file mode 100644
index 0000000000..ba5db74284
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/uminus_float.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       FloatNode(1...4)(),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/unary_minus.txt b/test/yarp/snapshots/seattlerb/unary_minus.txt
new file mode 100644
index 0000000000..abe6695149
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/unary_minus.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...2)(
+  [],
+  StatementsNode(0...2)(
+    [CallNode(0...2)(
+       CallNode(1...2)(nil, nil, (1...2), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/unary_plus.txt b/test/yarp/snapshots/seattlerb/unary_plus.txt
new file mode 100644
index 0000000000..635c033e94
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/unary_plus.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...2)(
+  [],
+  StatementsNode(0...2)(
+    [CallNode(0...2)(
+       CallNode(1...2)(nil, nil, (1...2), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "+@"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/unary_plus_on_literal.txt b/test/yarp/snapshots/seattlerb/unary_plus_on_literal.txt
new file mode 100644
index 0000000000..08370e47e9
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/unary_plus_on_literal.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)(
+    [CallNode(0...3)(
+       SymbolNode(1...3)((1...2), (2...3), nil, "a"),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "+@"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/unary_tilde.txt b/test/yarp/snapshots/seattlerb/unary_tilde.txt
new file mode 100644
index 0000000000..e73fdd577f
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/unary_tilde.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...2)(
+  [],
+  StatementsNode(0...2)(
+    [CallNode(0...2)(
+       CallNode(1...2)(nil, nil, (1...2), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "~"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/utf8_bom.txt b/test/yarp/snapshots/seattlerb/utf8_bom.txt
new file mode 100644
index 0000000000..81f1227688
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/utf8_bom.txt
@@ -0,0 +1,16 @@
+ProgramNode(26...29)(
+  [],
+  StatementsNode(26...29)(
+    [CallNode(26...29)(
+       nil,
+       nil,
+       (26...27),
+       nil,
+       ArgumentsNode(28...29)([IntegerNode(28...29)()]),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/when_splat.txt b/test/yarp/snapshots/seattlerb/when_splat.txt
new file mode 100644
index 0000000000..a4caedf301
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/when_splat.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [CaseNode(0...25)(
+       CallNode(5...6)(nil, nil, (5...6), nil, nil, nil, nil, 0, "a"),
+       [WhenNode(8...15)(
+          (8...12),
+          [SplatNode(13...15)(
+             (13...14),
+             CallNode(14...15)(nil, nil, (14...15), nil, nil, nil, nil, 0, "b")
+           )],
+          nil
+        )],
+       nil,
+       (0...4),
+       (22...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/words_interp.txt b/test/yarp/snapshots/seattlerb/words_interp.txt
new file mode 100644
index 0000000000..658901cbda
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/words_interp.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [ArrayNode(0...9)(
+       [InterpolatedStringNode(0...8)(
+          nil,
+          [EmbeddedStatementsNode(3...7)(
+             (3...5),
+             StatementsNode(5...6)([IntegerNode(5...6)()]),
+             (6...7)
+           ),
+           StringNode(7...8)(nil, (7...8), nil, "b")],
+          nil
+        )],
+       (0...3),
+       (8...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/wtf.txt b/test/yarp/snapshots/seattlerb/wtf.txt
new file mode 100644
index 0000000000..20e419bbc4
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/wtf.txt
@@ -0,0 +1,48 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [LambdaNode(0...25)(
+       [:a, :b],
+       (0...2),
+       BlockParametersNode(2...12)(
+         ParametersNode(3...11)(
+           [RequiredParameterNode(3...4)(:a)],
+           [OptionalParameterNode(6...11)(
+              :b,
+              (6...7),
+              (7...8),
+              NilNode(8...11)()
+            )],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (2...3),
+         (11...12)
+       ),
+       StatementsNode(15...23)(
+         [CallNode(15...23)(
+            nil,
+            nil,
+            (15...16),
+            nil,
+            ArgumentsNode(17...23)(
+              [ArrayNode(17...23)(
+                 [LocalVariableReadNode(18...19)(:a, 0),
+                  LocalVariableReadNode(21...22)(:b, 0)],
+                 (17...18),
+                 (22...23)
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "p"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/wtf_7.txt b/test/yarp/snapshots/seattlerb/wtf_7.txt
new file mode 100644
index 0000000000..e74a531178
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/wtf_7.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...2),
+       (2...3),
+       nil,
+       ArgumentsNode(4...7)(
+         [ParenthesesNode(4...7)(
+            StatementsNode(5...6)([IntegerNode(5...6)()]),
+            (4...5),
+            (6...7)
+          )]
+       ),
+       nil,
+       BlockNode(8...11)(
+         [],
+         nil,
+         StatementsNode(9...10)(
+           [CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "c")]
+         ),
+         (8...9),
+         (10...11)
+       ),
+       0,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/wtf_8.txt b/test/yarp/snapshots/seattlerb/wtf_8.txt
new file mode 100644
index 0000000000..211cd9f048
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/wtf_8.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (11...12),
+       nil,
+       ArgumentsNode(5...8)(
+         [ParenthesesNode(5...8)(
+            StatementsNode(6...7)([IntegerNode(6...7)()]),
+            (5...6),
+            (7...8)
+          )]
+       ),
+       nil,
+       BlockNode(9...12)(
+         [],
+         nil,
+         StatementsNode(10...11)(
+           [CallNode(10...11)(nil, nil, (10...11), nil, nil, nil, nil, 0, "c")]
+         ),
+         (9...10),
+         (11...12)
+       ),
+       0,
+       "}"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/yield_arg.txt b/test/yarp/snapshots/seattlerb/yield_arg.txt
new file mode 100644
index 0000000000..8fa3535617
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/yield_arg.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [YieldNode(0...8)(
+       (0...5),
+       nil,
+       ArgumentsNode(6...8)([IntegerNode(6...8)()]),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/yield_call_assocs.txt b/test/yarp/snapshots/seattlerb/yield_call_assocs.txt
new file mode 100644
index 0000000000..e6a56df147
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/yield_call_assocs.txt
@@ -0,0 +1,154 @@
+ProgramNode(0...100)(
+  [],
+  StatementsNode(0...100)(
+    [YieldNode(0...16)(
+       (0...5),
+       nil,
+       ArgumentsNode(6...16)(
+         [IntegerNode(6...7)(),
+          KeywordHashNode(9...16)(
+            [AssocNode(9...16)(
+               SymbolNode(9...11)((9...10), (10...11), nil, "z"),
+               IntegerNode(15...16)(),
+               (12...14)
+             )]
+          )]
+       ),
+       nil
+     ),
+     YieldNode(18...43)(
+       (18...23),
+       nil,
+       ArgumentsNode(24...43)(
+         [IntegerNode(24...25)(),
+          KeywordHashNode(27...43)(
+            [AssocNode(27...34)(
+               SymbolNode(27...29)((27...28), (28...29), nil, "z"),
+               IntegerNode(33...34)(),
+               (30...32)
+             ),
+             AssocNode(36...43)(
+               SymbolNode(36...38)((36...37), (37...38), nil, "w"),
+               IntegerNode(42...43)(),
+               (39...41)
+             )]
+          )]
+       ),
+       nil
+     ),
+     YieldNode(45...58)(
+       (45...50),
+       nil,
+       ArgumentsNode(51...58)(
+         [CallNode(51...58)(
+            nil,
+            nil,
+            (51...52),
+            nil,
+            ArgumentsNode(53...58)(
+              [KeywordHashNode(53...58)(
+                 [AssocNode(53...58)(
+                    SymbolNode(53...55)((53...54), (54...55), nil, "z"),
+                    IntegerNode(57...58)(),
+                    (55...57)
+                  )]
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "y"
+          )]
+       ),
+       nil
+     ),
+     YieldNode(60...71)(
+       (60...65),
+       nil,
+       ArgumentsNode(66...71)(
+         [CallNode(66...71)(
+            nil,
+            nil,
+            (66...67),
+            nil,
+            ArgumentsNode(68...71)(
+              [KeywordHashNode(68...71)(
+                 [AssocNode(68...71)(
+                    SymbolNode(68...70)(nil, (68...69), (69...70), "z"),
+                    IntegerNode(70...71)(),
+                    nil
+                  )]
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "y"
+          )]
+       ),
+       nil
+     ),
+     YieldNode(73...85)(
+       (73...78),
+       nil,
+       ArgumentsNode(79...85)(
+         [CallNode(79...85)(
+            nil,
+            nil,
+            (79...80),
+            (80...81),
+            ArgumentsNode(81...84)(
+              [KeywordHashNode(81...84)(
+                 [AssocNode(81...84)(
+                    SymbolNode(81...83)(nil, (81...82), (82...83), "z"),
+                    IntegerNode(83...84)(),
+                    nil
+                  )]
+               )]
+            ),
+            (84...85),
+            nil,
+            0,
+            "y"
+          )]
+       ),
+       nil
+     ),
+     YieldNode(87...100)(
+       (87...92),
+       nil,
+       ArgumentsNode(93...100)(
+         [CallNode(93...100)(
+            nil,
+            nil,
+            (93...94),
+            (94...95),
+            ArgumentsNode(95...99)(
+              [KeywordHashNode(95...99)(
+                 [AssocNode(95...99)(
+                    CallNode(95...96)(
+                      nil,
+                      nil,
+                      (95...96),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "z"
+                    ),
+                    IntegerNode(98...99)(),
+                    (96...98)
+                  )]
+               )]
+            ),
+            (99...100),
+            nil,
+            0,
+            "y"
+          )]
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/seattlerb/yield_empty_parens.txt b/test/yarp/snapshots/seattlerb/yield_empty_parens.txt
new file mode 100644
index 0000000000..14871f50e7
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/yield_empty_parens.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)([YieldNode(0...7)((0...5), (5...6), nil, (6...7))])
+)
diff --git a/test/yarp/snapshots/seattlerb/zomg_sometimes_i_hate_this_project.txt b/test/yarp/snapshots/seattlerb/zomg_sometimes_i_hate_this_project.txt
new file mode 100644
index 0000000000..ffc7e315da
--- /dev/null
+++ b/test/yarp/snapshots/seattlerb/zomg_sometimes_i_hate_this_project.txt
@@ -0,0 +1,81 @@
+ProgramNode(6...66)(
+  [],
+  StatementsNode(6...66)(
+    [HashNode(6...66)(
+       (6...7),
+       [AssocNode(16...41)(
+          SymbolNode(16...18)(nil, (16...17), (17...18), "a"),
+          CallNode(19...41)(
+            nil,
+            nil,
+            (19...25),
+            nil,
+            nil,
+            nil,
+            BlockNode(26...41)(
+              [],
+              nil,
+              StatementsNode(28...39)(
+                [IfNode(28...39)(
+                   nil,
+                   CallNode(28...29)(
+                     nil,
+                     nil,
+                     (28...29),
+                     nil,
+                     nil,
+                     nil,
+                     nil,
+                     0,
+                     "b"
+                   ),
+                   StatementsNode(32...35)(
+                     [CallNode(32...35)(
+                        nil,
+                        nil,
+                        (32...33),
+                        (33...34),
+                        nil,
+                        (34...35),
+                        nil,
+                        0,
+                        "c"
+                      )]
+                   ),
+                   ElseNode(36...39)(
+                     (36...37),
+                     StatementsNode(38...39)(
+                       [CallNode(38...39)(
+                          nil,
+                          nil,
+                          (38...39),
+                          nil,
+                          nil,
+                          nil,
+                          nil,
+                          0,
+                          "d"
+                        )]
+                     ),
+                     nil
+                   ),
+                   nil
+                 )]
+              ),
+              (26...27),
+              (40...41)
+            ),
+            0,
+            "lambda"
+          ),
+          nil
+        ),
+        AssocNode(51...57)(
+          SymbolNode(51...53)(nil, (51...52), (52...53), "e"),
+          NilNode(54...57)(),
+          nil
+        )],
+       (65...66)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/single_quote_heredocs.txt b/test/yarp/snapshots/single_quote_heredocs.txt
new file mode 100644
index 0000000000..3e53eb791b
--- /dev/null
+++ b/test/yarp/snapshots/single_quote_heredocs.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...48)(
+  [],
+  StatementsNode(0...48)(
+    [InterpolatedStringNode(0...48)(
+       (0...8),
+       [StringNode(9...44)(
+          nil,
+          (9...44),
+          nil,
+          "    cd L:\\Work\\MG3710IQPro\\Develop\n"
+        )],
+       (44...48)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/strings.txt b/test/yarp/snapshots/strings.txt
new file mode 100644
index 0000000000..9b2821a0fd
--- /dev/null
+++ b/test/yarp/snapshots/strings.txt
@@ -0,0 +1,201 @@
+ProgramNode(0...497)(
+  [],
+  StatementsNode(0...497)(
+    [StringNode(0...6)((0...2), (2...5), (5...6), "abc"),
+     StringNode(8...14)((8...10), (10...13), (13...14), "abc"),
+     StringNode(16...22)((16...18), (18...21), (21...22), "abc"),
+     StringNode(24...30)((24...26), (26...29), (29...30), "abc"),
+     StringNode(32...38)((32...34), (34...37), (37...38), "abc"),
+     StringNode(40...46)((40...42), (42...45), (45...46), "abc"),
+     StringNode(48...54)((48...50), (50...53), (53...54), "abc"),
+     StringNode(56...62)((56...58), (58...61), (61...62), "abc"),
+     StringNode(64...70)((64...66), (66...69), (69...70), "abc"),
+     StringNode(72...78)((72...74), (74...77), (77...78), "abc"),
+     StringNode(80...86)((80...82), (82...85), (85...86), "abc"),
+     StringNode(88...94)((88...90), (90...93), (93...94), "abc"),
+     ArrayNode(96...104)([], (96...99), (103...104)),
+     StringNode(106...112)((106...108), (108...111), (111...112), "abc"),
+     StringNode(114...120)((114...116), (116...119), (119...120), "abc"),
+     InterpolatedStringNode(122...130)(
+       (122...123),
+       [EmbeddedVariableNode(123...129)(
+          (123...124),
+          ClassVariableReadNode(124...129)()
+        )],
+       (129...130)
+     ),
+     StringNode(132...138)((132...134), (134...137), (137...138), "abc"),
+     InterpolatedStringNode(140...157)(
+       (140...142),
+       [StringNode(142...146)(nil, (142...146), nil, "aaa "),
+        EmbeddedStatementsNode(146...152)(
+          (146...148),
+          StatementsNode(148...151)(
+            [CallNode(148...151)(
+               nil,
+               nil,
+               (148...151),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bbb"
+             )]
+          ),
+          (151...152)
+        ),
+        StringNode(152...156)(nil, (152...156), nil, " ccc")],
+       (156...157)
+     ),
+     StringNode(159...167)((159...161), (161...166), (166...167), "foo[]"),
+     CallNode(169...183)(
+       StringNode(169...174)((169...170), (170...173), (173...174), "foo"),
+       nil,
+       (175...176),
+       nil,
+       ArgumentsNode(178...183)(
+         [StringNode(178...183)((178...179), (179...182), (182...183), "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     StringNode(185...192)((185...188), (188...191), (191...192), "abc"),
+     SymbolNode(194...201)((194...197), (197...200), (200...201), "abc"),
+     StringNode(203...209)((203...205), (205...208), (208...209), "abc"),
+     StringNode(211...213)((211...212), (212...212), (212...213), ""),
+     StringNode(215...220)((215...216), (216...219), (219...220), "abc"),
+     StringNode(222...229)((222...223), (223...228), (228...229), "\#@---"),
+     InterpolatedStringNode(231...247)(
+       (231...232),
+       [StringNode(232...236)(nil, (232...236), nil, "aaa "),
+        EmbeddedStatementsNode(236...242)(
+          (236...238),
+          StatementsNode(238...241)(
+            [CallNode(238...241)(
+               nil,
+               nil,
+               (238...241),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bbb"
+             )]
+          ),
+          (241...242)
+        ),
+        StringNode(242...246)(nil, (242...246), nil, " ccc")],
+       (246...247)
+     ),
+     StringNode(249...254)((249...250), (250...253), (253...254), "abc"),
+     ArrayNode(256...265)(
+       [StringNode(259...260)(nil, (259...260), nil, "a"),
+        StringNode(261...262)(nil, (261...262), nil, "b"),
+        StringNode(263...264)(nil, (263...264), nil, "c")],
+       (256...259),
+       (264...265)
+     ),
+     ArrayNode(267...284)(
+       [StringNode(270...273)(nil, (270...273), nil, "a[]"),
+        StringNode(274...279)(nil, (274...279), nil, "b[[]]"),
+        StringNode(280...283)(nil, (280...283), nil, "c[]")],
+       (267...270),
+       (283...284)
+     ),
+     ArrayNode(286...304)(
+       [StringNode(289...297)(nil, (289...297), nil, "foo\\ bar"),
+        StringNode(298...303)(nil, (298...303), nil, "\\\#{1}")],
+       (286...289),
+       (303...304)
+     ),
+     ArrayNode(306...322)(
+       [StringNode(309...317)(nil, (309...317), nil, "foo\\ bar"),
+        StringNode(318...321)(nil, (318...321), nil, "baz")],
+       (306...309),
+       (321...322)
+     ),
+     ArrayNode(324...338)(
+       [StringNode(327...328)(nil, (327...328), nil, "a"),
+        InterpolatedStringNode(0...335)(
+          nil,
+          [StringNode(329...330)(nil, (329...330), nil, "b"),
+           EmbeddedStatementsNode(330...334)(
+             (330...332),
+             StatementsNode(332...333)(
+               [CallNode(332...333)(
+                  nil,
+                  nil,
+                  (332...333),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "c"
+                )]
+             ),
+             (333...334)
+           ),
+           StringNode(334...335)(nil, (334...335), nil, "d")],
+          nil
+        ),
+        StringNode(336...337)(nil, (336...337), nil, "e")],
+       (324...327),
+       (337...338)
+     ),
+     ArrayNode(340...349)(
+       [StringNode(343...344)(nil, (343...344), nil, "a"),
+        StringNode(345...346)(nil, (345...346), nil, "b"),
+        StringNode(347...348)(nil, (347...348), nil, "c")],
+       (340...343),
+       (348...349)
+     ),
+     ArrayNode(351...368)(
+       [StringNode(357...358)(nil, (357...358), nil, "a"),
+        StringNode(361...362)(nil, (361...362), nil, "b"),
+        StringNode(365...366)(nil, (365...366), nil, "c")],
+       (351...354),
+       (367...368)
+     ),
+     StringNode(370...385)(
+       (370...371),
+       (371...384),
+       (384...385),
+       "' foo ' bar"
+     ),
+     StringNode(387...402)(
+       (387...388),
+       (388...401),
+       (401...402),
+       "\\ foo \\ bar"
+     ),
+     InterpolatedStringNode(404...411)(
+       (404...405),
+       [EmbeddedVariableNode(405...410)(
+          (405...406),
+          GlobalVariableReadNode(406...410)()
+        )],
+       (410...411)
+     ),
+     InterpolatedStringNode(413...420)(
+       (413...414),
+       [EmbeddedVariableNode(414...419)(
+          (414...415),
+          InstanceVariableReadNode(415...419)()
+        )],
+       (419...420)
+     ),
+     StringNode(422...437)((422...423), (423...436), (436...437), "\a # a"),
+     StringNode(439...452)((439...440), (440...451), (451...452), "\a # a"),
+     StringNode(454...460)((454...456), (456...459), (459...460), "abc"),
+     StringNode(462...468)((462...464), (464...467), (467...468), "abc"),
+     StringNode(470...476)((470...472), (472...475), (475...476), "abc"),
+     StringNode(478...484)((478...480), (480...483), (483...484), "abc"),
+     StringNode(486...488)((486...487), (487...488), nil, "a"),
+     StringNode(490...497)((490...493), (493...496), (496...497), "abc")]
+  )
+)
diff --git a/test/yarp/snapshots/super.txt b/test/yarp/snapshots/super.txt
new file mode 100644
index 0000000000..e9d32d14bd
--- /dev/null
+++ b/test/yarp/snapshots/super.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [ForwardingSuperNode(0...5)(nil),
+     SuperNode(7...14)((7...12), (12...13), nil, (13...14), nil),
+     SuperNode(16...24)(
+       (16...21),
+       (21...22),
+       ArgumentsNode(22...23)([IntegerNode(22...23)()]),
+       (23...24),
+       nil
+     ),
+     SuperNode(26...40)(
+       (26...31),
+       (31...32),
+       ArgumentsNode(32...39)(
+         [IntegerNode(32...33)(),
+          IntegerNode(35...36)(),
+          IntegerNode(38...39)()]
+       ),
+       (39...40),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/symbols.txt b/test/yarp/snapshots/symbols.txt
new file mode 100644
index 0000000000..6e8e1c0bb7
--- /dev/null
+++ b/test/yarp/snapshots/symbols.txt
@@ -0,0 +1,147 @@
+ProgramNode(0...345)(
+  [],
+  StatementsNode(0...345)(
+    [SymbolNode(0...6)((0...2), (2...5), (5...6), "abc"),
+     InterpolatedSymbolNode(8...17)(
+       (8...10),
+       [EmbeddedStatementsNode(10...16)(
+          (10...12),
+          StatementsNode(12...15)(
+            [CallNode(12...15)(
+               nil,
+               nil,
+               (12...15),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "var"
+             )]
+          ),
+          (15...16)
+        )],
+       (16...17)
+     ),
+     InterpolatedSymbolNode(19...29)(
+       (19...21),
+       [StringNode(21...24)(nil, (21...24), nil, "abc"),
+        EmbeddedStatementsNode(24...28)(
+          (24...26),
+          StatementsNode(26...27)([IntegerNode(26...27)()]),
+          (27...28)
+        )],
+       (28...29)
+     ),
+     ArrayNode(31...51)(
+       [SymbolNode(32...35)((32...33), (33...35), nil, "Υ"),
+        SymbolNode(37...40)((37...38), (38...40), nil, "ά"),
+        SymbolNode(42...45)((42...43), (43...45), nil, "ŗ"),
+        SymbolNode(47...50)((47...48), (48...50), nil, "ρ")],
+       (31...32),
+       (50...51)
+     ),
+     SymbolNode(53...56)((53...54), (54...56), nil, "-@"),
+     SymbolNode(58...60)((58...59), (59...60), nil, "-"),
+     SymbolNode(62...64)((62...63), (63...64), nil, "%"),
+     SymbolNode(66...68)((66...67), (67...68), nil, "|"),
+     SymbolNode(70...73)((70...71), (71...73), nil, "+@"),
+     SymbolNode(75...77)((75...76), (76...77), nil, "+"),
+     SymbolNode(79...81)((79...80), (80...81), nil, "/"),
+     SymbolNode(83...86)((83...84), (84...86), nil, "**"),
+     SymbolNode(88...90)((88...89), (89...90), nil, "*"),
+     SymbolNode(92...95)((92...93), (93...95), nil, "~@"),
+     ArrayNode(97...113)(
+       [IntegerNode(98...99)(),
+        FloatNode(101...104)(),
+        RationalNode(106...108)(IntegerNode(106...107)()),
+        ImaginaryNode(110...112)(IntegerNode(110...111)())],
+       (97...98),
+       (112...113)
+     ),
+     SymbolNode(115...117)((115...116), (116...117), nil, "~"),
+     SymbolNode(119...121)((119...120), (120...121), nil, "a"),
+     ArrayNode(123...132)(
+       [SymbolNode(126...127)(nil, (126...127), nil, "a"),
+        SymbolNode(128...129)(nil, (128...129), nil, "b"),
+        SymbolNode(130...131)(nil, (130...131), nil, "c")],
+       (123...126),
+       (131...132)
+     ),
+     ArrayNode(134...158)(
+       [SymbolNode(137...138)(nil, (137...138), nil, "a"),
+        SymbolNode(139...144)(nil, (139...144), nil, "b\#{1}"),
+        SymbolNode(145...150)(nil, (145...150), nil, "\#{2}c"),
+        SymbolNode(151...157)(nil, (151...157), nil, "d\#{3}f")],
+       (134...137),
+       (157...158)
+     ),
+     ArrayNode(160...184)(
+       [SymbolNode(163...164)(nil, (163...164), nil, "a"),
+        InterpolatedSymbolNode(165...170)(
+          nil,
+          [StringNode(165...166)(nil, (165...166), nil, "b"),
+           EmbeddedStatementsNode(166...170)(
+             (166...168),
+             StatementsNode(168...169)([IntegerNode(168...169)()]),
+             (169...170)
+           )],
+          nil
+        ),
+        InterpolatedSymbolNode(171...176)(
+          nil,
+          [EmbeddedStatementsNode(171...175)(
+             (171...173),
+             StatementsNode(173...174)([IntegerNode(173...174)()]),
+             (174...175)
+           ),
+           StringNode(175...176)(nil, (175...176), nil, "c")],
+          nil
+        ),
+        InterpolatedSymbolNode(177...183)(
+          nil,
+          [StringNode(177...178)(nil, (177...178), nil, "d"),
+           EmbeddedStatementsNode(178...182)(
+             (178...180),
+             StatementsNode(180...181)([IntegerNode(180...181)()]),
+             (181...182)
+           ),
+           StringNode(182...183)(nil, (182...183), nil, "f")],
+          nil
+        )],
+       (160...163),
+       (183...184)
+     ),
+     SymbolNode(186...190)((186...187), (187...190), nil, "@@a"),
+     SymbolNode(192...197)((192...193), (193...197), nil, "👍"),
+     ArrayNode(199...206)(
+       [SymbolNode(202...205)(nil, (202...205), nil, "a\\b")],
+       (199...202),
+       (205...206)
+     ),
+     SymbolNode(208...211)((208...209), (209...211), nil, "$a"),
+     SymbolNode(213...216)((213...214), (214...216), nil, "@a"),
+     SymbolNode(218...221)((218...219), (219...221), nil, "do"),
+     SymbolNode(223...225)((223...224), (224...225), nil, "&"),
+     SymbolNode(227...229)((227...228), (228...229), nil, "`"),
+     SymbolNode(231...234)((231...232), (232...234), nil, "!@"),
+     SymbolNode(236...239)((236...237), (237...239), nil, "!~"),
+     SymbolNode(241...243)((241...242), (242...243), nil, "!"),
+     SymbolNode(245...248)((245...246), (246...248), nil, "[]"),
+     SymbolNode(250...254)((250...251), (251...254), nil, "[]="),
+     SymbolNode(256...258)((256...257), (257...258), nil, "^"),
+     SymbolNode(260...263)((260...261), (261...263), nil, "=="),
+     SymbolNode(265...269)((265...266), (266...269), nil, "==="),
+     SymbolNode(271...274)((271...272), (272...274), nil, "=~"),
+     SymbolNode(276...279)((276...277), (277...279), nil, ">="),
+     SymbolNode(281...284)((281...282), (282...284), nil, ">>"),
+     SymbolNode(286...288)((286...287), (287...288), nil, ">"),
+     SymbolNode(290...294)((290...291), (291...294), nil, "<=>"),
+     SymbolNode(296...299)((296...297), (297...299), nil, "<="),
+     SymbolNode(301...304)((301...302), (302...304), nil, "<<"),
+     SymbolNode(306...308)((306...307), (307...308), nil, "<"),
+     SymbolNode(310...319)((310...311), (311...319), nil, "__LINE__"),
+     SymbolNode(321...330)((321...322), (322...330), nil, "__FILE__"),
+     SymbolNode(332...345)((332...333), (333...345), nil, "__ENCODING__")]
+  )
+)
diff --git a/test/yarp/snapshots/ternary_operator.txt b/test/yarp/snapshots/ternary_operator.txt
new file mode 100644
index 0000000000..11d6495783
--- /dev/null
+++ b/test/yarp/snapshots/ternary_operator.txt
@@ -0,0 +1,134 @@
+ProgramNode(0...117)(
+  [],
+  StatementsNode(0...117)(
+    [IfNode(0...9)(
+       nil,
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       StatementsNode(4...5)(
+         [CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "b")]
+       ),
+       ElseNode(6...9)(
+         (6...7),
+         StatementsNode(8...9)(
+           [CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "c")]
+         ),
+         nil
+       ),
+       nil
+     ),
+     IfNode(11...38)(
+       nil,
+       CallNode(11...12)(nil, nil, (11...12), nil, nil, nil, nil, 0, "a"),
+       StatementsNode(15...25)(
+         [DefinedNode(15...25)(
+            nil,
+            CallNode(24...25)(nil, nil, (24...25), nil, nil, nil, nil, 0, "b"),
+            nil,
+            (15...23)
+          )]
+       ),
+       ElseNode(26...38)(
+         (26...27),
+         StatementsNode(28...38)(
+           [DefinedNode(28...38)(
+              nil,
+              CallNode(37...38)(
+                nil,
+                nil,
+                (37...38),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "c"
+              ),
+              nil,
+              (28...36)
+            )]
+         ),
+         nil
+       ),
+       nil
+     ),
+     IfNode(40...55)(
+       nil,
+       CallNode(40...46)(nil, nil, (40...46), nil, nil, nil, nil, 0, "empty?"),
+       StatementsNode(47...51)([TrueNode(47...51)()]),
+       ElseNode(51...55)(
+         (51...52),
+         StatementsNode(52...55)([NilNode(52...55)()]),
+         nil
+       ),
+       nil
+     ),
+     IfNode(57...73)(
+       nil,
+       CallNode(57...63)(nil, nil, (57...63), nil, nil, nil, nil, 0, "empty?"),
+       StatementsNode(64...69)([FalseNode(64...69)()]),
+       ElseNode(69...73)(
+         (69...70),
+         StatementsNode(70...73)([NilNode(70...73)()]),
+         nil
+       ),
+       nil
+     ),
+     IfNode(75...89)(
+       nil,
+       CallNode(75...81)(nil, nil, (75...81), nil, nil, nil, nil, 0, "empty?"),
+       StatementsNode(82...85)([NilNode(82...85)()]),
+       ElseNode(85...89)(
+         (85...86),
+         StatementsNode(86...89)([NilNode(86...89)()]),
+         nil
+       ),
+       nil
+     ),
+     IfNode(91...101)(
+       nil,
+       CallNode(91...93)(nil, nil, (91...93), nil, nil, nil, nil, 0, "a?"),
+       StatementsNode(94...97)([NilNode(94...97)()]),
+       ElseNode(97...101)(
+         (97...98),
+         StatementsNode(98...101)([NilNode(98...101)()]),
+         nil
+       ),
+       nil
+     ),
+     IfNode(103...117)(
+       nil,
+       CallNode(103...104)(nil, nil, (103...104), nil, nil, nil, nil, 0, "a"),
+       StatementsNode(106...110)(
+         [CallNode(106...110)(
+            nil,
+            nil,
+            (106...110),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "var1"
+          )]
+       ),
+       ElseNode(111...117)(
+         (111...112),
+         StatementsNode(113...117)(
+           [CallNode(113...117)(
+              nil,
+              nil,
+              (113...117),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "var2"
+            )]
+         ),
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/tilde_heredocs.txt b/test/yarp/snapshots/tilde_heredocs.txt
new file mode 100644
index 0000000000..fc51879e4f
--- /dev/null
+++ b/test/yarp/snapshots/tilde_heredocs.txt
@@ -0,0 +1,136 @@
+ProgramNode(0...387)(
+  [],
+  StatementsNode(0...387)(
+    [InterpolatedStringNode(0...15)(
+       (0...6),
+       [StringNode(7...11)(nil, (7...11), nil, "a\n")],
+       (11...15)
+     ),
+     InterpolatedStringNode(16...38)(
+       (16...22),
+       [StringNode(23...34)(nil, (23...34), nil, "\ta\n" + "b\n" + "\t\tc\n")],
+       (34...38)
+     ),
+     InterpolatedStringNode(39...59)(
+       (39...45),
+       [StringNode(46...48)(nil, (46...48), nil, ""),
+        EmbeddedStatementsNode(48...52)(
+          (48...50),
+          StatementsNode(50...51)([IntegerNode(50...51)()]),
+          (51...52)
+        ),
+        StringNode(52...55)(nil, (52...55), nil, " a\n")],
+       (55...59)
+     ),
+     InterpolatedStringNode(60...80)(
+       (60...66),
+       [StringNode(67...71)(nil, (67...71), nil, "a "),
+        EmbeddedStatementsNode(71...75)(
+          (71...73),
+          StatementsNode(73...74)([IntegerNode(73...74)()]),
+          (74...75)
+        ),
+        StringNode(75...76)(nil, (75...76), nil, "\n")],
+       (76...80)
+     ),
+     InterpolatedStringNode(81...102)(
+       (81...87),
+       [StringNode(88...93)(nil, (88...93), nil, " a\n"),
+        EmbeddedStatementsNode(93...97)(
+          (93...95),
+          StatementsNode(95...96)([IntegerNode(95...96)()]),
+          (96...97)
+        ),
+        StringNode(97...98)(nil, (97...98), nil, "\n")],
+       (98...102)
+     ),
+     InterpolatedStringNode(103...125)(
+       (103...109),
+       [StringNode(110...116)(nil, (110...116), nil, "a\n"),
+        EmbeddedStatementsNode(116...120)(
+          (116...118),
+          StatementsNode(118...119)([IntegerNode(118...119)()]),
+          (119...120)
+        ),
+        StringNode(120...121)(nil, (120...121), nil, "\n")],
+       (121...125)
+     ),
+     InterpolatedStringNode(126...145)(
+       (126...132),
+       [StringNode(133...141)(nil, (133...141), nil, "a\n" + "b\n")],
+       (141...145)
+     ),
+     InterpolatedStringNode(146...166)(
+       (146...152),
+       [StringNode(153...162)(nil, (153...162), nil, "a\n" + " b\n")],
+       (162...166)
+     ),
+     InterpolatedStringNode(167...187)(
+       (167...173),
+       [StringNode(174...183)(nil, (174...183), nil, "\ta\n" + "b\n")],
+       (183...187)
+     ),
+     InterpolatedStringNode(188...210)(
+       (188...196),
+       [StringNode(197...206)(nil, (197...206), nil, "a \#{1}\n")],
+       (206...210)
+     ),
+     InterpolatedStringNode(211...229)(
+       (211...217),
+       [StringNode(218...225)(nil, (218...225), nil, "a\n" + " b\n")],
+       (225...229)
+     ),
+     InterpolatedStringNode(230...248)(
+       (230...236),
+       [StringNode(237...244)(nil, (237...244), nil, " a\n" + "b\n")],
+       (244...248)
+     ),
+     InterpolatedStringNode(249...275)(
+       (249...255),
+       [StringNode(256...271)(nil, (256...271), nil, "a\n" + "b\n")],
+       (271...275)
+     ),
+     InterpolatedStringNode(276...296)(
+       (276...282),
+       [StringNode(283...292)(nil, (283...292), nil, "a\n" + "\n" + "b\n")],
+       (292...296)
+     ),
+     InterpolatedStringNode(297...317)(
+       (297...303),
+       [StringNode(304...313)(nil, (304...313), nil, "a\n" + "\n" + "b\n")],
+       (313...317)
+     ),
+     InterpolatedStringNode(318...340)(
+       (318...324),
+       [StringNode(325...336)(
+          nil,
+          (325...336),
+          nil,
+          "a\n" + "\n" + "\n" + "\n" + "b\n"
+        )],
+       (336...340)
+     ),
+     InterpolatedStringNode(341...365)(
+       (341...347),
+       [StringNode(348...351)(nil, (348...351), nil, "\n"),
+        EmbeddedStatementsNode(351...355)(
+          (351...353),
+          StatementsNode(353...354)([IntegerNode(353...354)()]),
+          (354...355)
+        ),
+        StringNode(355...357)(nil, (355...357), nil, "a\n")],
+       (357...365)
+     ),
+     InterpolatedStringNode(366...387)(
+       (366...372),
+       [StringNode(373...375)(nil, (373...375), nil, ""),
+        EmbeddedStatementsNode(375...379)(
+          (375...377),
+          StatementsNode(377...378)([IntegerNode(377...378)()]),
+          (378...379)
+        ),
+        StringNode(379...383)(nil, (379...383), nil, "\n" + "\tb\n")],
+       (383...387)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/undef.txt b/test/yarp/snapshots/undef.txt
new file mode 100644
index 0000000000..d3173a3f1c
--- /dev/null
+++ b/test/yarp/snapshots/undef.txt
@@ -0,0 +1,50 @@
+ProgramNode(0...116)(
+  [],
+  StatementsNode(0...116)(
+    [UndefNode(0...7)([SymbolNode(6...7)(nil, (6...7), nil, "a")], (0...5)),
+     UndefNode(9...19)(
+       [SymbolNode(15...16)(nil, (15...16), nil, "a"),
+        SymbolNode(18...19)(nil, (18...19), nil, "b")],
+       (9...14)
+     ),
+     UndefNode(21...29)(
+       [SymbolNode(27...29)(nil, (27...29), nil, "if")],
+       (21...26)
+     ),
+     UndefNode(31...40)(
+       [SymbolNode(37...40)(nil, (37...40), nil, "<=>")],
+       (31...36)
+     ),
+     UndefNode(42...50)(
+       [SymbolNode(48...50)((48...49), (49...50), nil, "a")],
+       (42...47)
+     ),
+     UndefNode(52...68)(
+       [SymbolNode(58...60)((58...59), (59...60), nil, "a"),
+        SymbolNode(62...64)((62...63), (63...64), nil, "b"),
+        SymbolNode(66...68)((66...67), (67...68), nil, "c")],
+       (52...57)
+     ),
+     UndefNode(70...82)(
+       [SymbolNode(76...82)((76...78), (78...81), (81...82), "abc")],
+       (70...75)
+     ),
+     UndefNode(84...100)(
+       [InterpolatedSymbolNode(90...100)(
+          (90...92),
+          [StringNode(92...95)(nil, (92...95), nil, "abc"),
+           EmbeddedStatementsNode(95...99)(
+             (95...97),
+             StatementsNode(97...98)([IntegerNode(97...98)()]),
+             (98...99)
+           )],
+          (99...100)
+        )],
+       (84...89)
+     ),
+     UndefNode(102...116)(
+       [SymbolNode(108...116)(nil, (108...116), nil, "Constant")],
+       (102...107)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unescaping.txt b/test/yarp/snapshots/unescaping.txt
new file mode 100644
index 0000000000..e63e8eb072
--- /dev/null
+++ b/test/yarp/snapshots/unescaping.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...55)(
+  [],
+  StatementsNode(0...55)(
+    [ArrayNode(0...10)(
+       [StringNode(1...9)((1...2), (2...8), (8...9), "\u0003{1}")],
+       (0...1),
+       (9...10)
+     ),
+     RegularExpressionNode(12...20)(
+       (12...13),
+       (13...19),
+       (19...20),
+       "\u0003{1}",
+       0
+     ),
+     StringNode(22...30)((22...23), (23...29), (29...30), "\u0003{1}"),
+     InterpolatedStringNode(32...55)(
+       (32...39),
+       [StringNode(40...50)(nil, (40...50), nil, "\u0003{1}\n")],
+       (50...55)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unless.txt b/test/yarp/snapshots/unless.txt
new file mode 100644
index 0000000000..66d61a7307
--- /dev/null
+++ b/test/yarp/snapshots/unless.txt
@@ -0,0 +1,83 @@
+ProgramNode(0...141)(
+  [],
+  StatementsNode(0...141)(
+    [UnlessNode(0...19)(
+       (0...6),
+       TrueNode(7...11)(),
+       StatementsNode(13...14)([IntegerNode(13...14)()]),
+       nil,
+       (16...19)
+     ),
+     UnlessNode(21...45)(
+       (21...27),
+       TrueNode(28...32)(),
+       StatementsNode(33...34)([IntegerNode(33...34)()]),
+       ElseNode(35...45)(
+         (35...39),
+         StatementsNode(40...41)([IntegerNode(40...41)()]),
+         (42...45)
+       ),
+       (42...45)
+     ),
+     UnlessNode(47...60)(
+       (49...55),
+       TrueNode(56...60)(),
+       StatementsNode(47...48)([IntegerNode(47...48)()]),
+       nil,
+       nil
+     ),
+     UnlessNode(62...79)(
+       (68...74),
+       TrueNode(75...79)(),
+       StatementsNode(62...67)([BreakNode(62...67)(nil, (62...67))]),
+       nil,
+       nil
+     ),
+     UnlessNode(81...97)(
+       (86...92),
+       TrueNode(93...97)(),
+       StatementsNode(81...85)([NextNode(81...85)(nil, (81...85))]),
+       nil,
+       nil
+     ),
+     UnlessNode(99...117)(
+       (106...112),
+       TrueNode(113...117)(),
+       StatementsNode(99...105)([ReturnNode(99...105)((99...105), nil)]),
+       nil,
+       nil
+     ),
+     UnlessNode(119...141)(
+       (130...136),
+       CallNode(137...141)(
+         nil,
+         nil,
+         (137...141),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar?"
+       ),
+       StatementsNode(119...129)(
+         [CallNode(119...129)(
+            nil,
+            nil,
+            (119...122),
+            nil,
+            ArgumentsNode(123...129)(
+              [SymbolNode(123...125)((123...124), (124...125), nil, "a"),
+               SymbolNode(127...129)((127...128), (128...129), nil, "b")]
+            ),
+            nil,
+            nil,
+            0,
+            "foo"
+          )]
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/alias.txt b/test/yarp/snapshots/unparser/corpus/literal/alias.txt
new file mode 100644
index 0000000000..cf6c04cd2e
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/alias.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [AliasNode(0...15)(
+       GlobalVariableReadNode(6...10)(),
+       GlobalVariableReadNode(11...15)(),
+       (0...5)
+     ),
+     AliasNode(16...31)(
+       SymbolNode(22...26)((22...23), (23...26), nil, "foo"),
+       SymbolNode(27...31)((27...28), (28...31), nil, "bar"),
+       (16...21)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/assignment.txt b/test/yarp/snapshots/unparser/corpus/literal/assignment.txt
new file mode 100644
index 0000000000..1e06024e29
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/assignment.txt
@@ -0,0 +1,718 @@
+ProgramNode(0...719)(
+  [:a, :b, :foo, :c, :x],
+  StatementsNode(0...719)(
+    [GlobalVariableWriteNode(0...6)((0...2), (3...4), IntegerNode(5...6)()),
+     MultiWriteNode(8...24)(
+       [GlobalVariableWriteNode(8...10)((8...10), nil, nil),
+        GlobalVariableWriteNode(12...14)((12...14), nil, nil)],
+       (16...17),
+       ArrayNode(18...24)(
+         [IntegerNode(19...20)(), IntegerNode(22...23)()],
+         (18...19),
+         (23...24)
+       ),
+       (7...8),
+       (14...15)
+     ),
+     MultiWriteNode(27...38)(
+       [MultiWriteNode(27...29)(
+          [LocalVariableWriteNode(27...28)(:a, 0, nil, (27...28), nil),
+           SplatNode(28...29)((28...29), nil)],
+          nil,
+          nil,
+          (26...27),
+          (29...30)
+        ),
+        LocalVariableWriteNode(32...33)(:b, 0, nil, (32...33), nil)],
+       (35...36),
+       IntegerNode(37...38)(),
+       (25...26),
+       (33...34)
+     ),
+     MultiWriteNode(40...48)(
+       [SplatNode(40...42)(
+          (40...41),
+          LocalVariableWriteNode(41...42)(:a, 0, nil, (41...42), nil)
+        )],
+       (44...45),
+       ArrayNode(46...48)([], (46...47), (47...48)),
+       (39...40),
+       (42...43)
+     ),
+     MultiWriteNode(50...64)(
+       [SplatNode(50...54)(
+          (50...51),
+          LocalVariableWriteNode(51...54)(:foo, 0, nil, (51...54), nil)
+        )],
+       (56...57),
+       ArrayNode(58...64)(
+         [IntegerNode(59...60)(), IntegerNode(62...63)()],
+         (58...59),
+         (63...64)
+       ),
+       (49...50),
+       (54...55)
+     ),
+     MultiWriteNode(66...84)(
+       [ClassVariableWriteNode(66...69)((66...69), nil, nil),
+        ClassVariableWriteNode(71...74)((71...74), nil, nil)],
+       (76...77),
+       ArrayNode(78...84)(
+         [IntegerNode(79...80)(), IntegerNode(82...83)()],
+         (78...79),
+         (83...84)
+       ),
+       (65...66),
+       (74...75)
+     ),
+     MultiWriteNode(86...102)(
+       [InstanceVariableWriteNode(86...88)((86...88), nil, nil),
+        InstanceVariableWriteNode(90...92)((90...92), nil, nil)],
+       (94...95),
+       ArrayNode(96...102)(
+         [IntegerNode(97...98)(), IntegerNode(100...101)()],
+         (96...97),
+         (101...102)
+       ),
+       (85...86),
+       (92...93)
+     ),
+     MultiWriteNode(104...128)(
+       [LocalVariableWriteNode(104...105)(:a, 0, nil, (104...105), nil),
+        MultiWriteNode(108...113)(
+          [LocalVariableWriteNode(108...109)(:b, 0, nil, (108...109), nil),
+           LocalVariableWriteNode(111...112)(:c, 0, nil, (111...112), nil)],
+          nil,
+          nil,
+          (107...108),
+          (112...113)
+        )],
+       (115...116),
+       ArrayNode(117...128)(
+         [IntegerNode(118...119)(),
+          ArrayNode(121...127)(
+            [IntegerNode(122...123)(), IntegerNode(125...126)()],
+            (121...122),
+            (126...127)
+          )],
+         (117...118),
+         (127...128)
+       ),
+       (103...104),
+       (113...114)
+     ),
+     MultiWriteNode(130...144)(
+       [LocalVariableWriteNode(130...131)(:a, 0, nil, (130...131), nil),
+        SplatNode(133...134)((133...134), nil)],
+       (136...137),
+       ArrayNode(138...144)(
+         [IntegerNode(139...140)(), IntegerNode(142...143)()],
+         (138...139),
+         (143...144)
+       ),
+       (129...130),
+       (134...135)
+     ),
+     MultiWriteNode(146...163)(
+       [LocalVariableWriteNode(146...147)(:a, 0, nil, (146...147), nil),
+        SplatNode(149...153)(
+          (149...150),
+          LocalVariableWriteNode(150...153)(:foo, 0, nil, (150...153), nil)
+        )],
+       (155...156),
+       ArrayNode(157...163)(
+         [IntegerNode(158...159)(), IntegerNode(161...162)()],
+         (157...158),
+         (162...163)
+       ),
+       (145...146),
+       (153...154)
+     ),
+     MultiWriteNode(165...179)(
+       [LocalVariableWriteNode(165...166)(:a, 0, nil, (165...166), nil),
+        LocalVariableWriteNode(168...169)(:b, 0, nil, (168...169), nil)],
+       (171...172),
+       ArrayNode(173...179)(
+         [IntegerNode(174...175)(), IntegerNode(177...178)()],
+         (173...174),
+         (178...179)
+       ),
+       (164...165),
+       (169...170)
+     ),
+     MultiWriteNode(181...192)(
+       [LocalVariableWriteNode(181...182)(:a, 0, nil, (181...182), nil),
+        LocalVariableWriteNode(184...185)(:b, 0, nil, (184...185), nil)],
+       (187...188),
+       LocalVariableReadNode(189...192)(:foo, 0),
+       (180...181),
+       (185...186)
+     ),
+     MultiWriteNode(194...203)(
+       [LocalVariableWriteNode(194...195)(:a, 0, nil, (194...195), nil),
+        SplatNode(195...196)((195...196), nil)],
+       (198...199),
+       LocalVariableReadNode(200...203)(:foo, 0),
+       (193...194),
+       (196...197)
+     ),
+     MultiWriteNode(205...227)(
+       [CallNode(205...210)(
+          LocalVariableReadNode(205...206)(:a, 0),
+          (206...207),
+          (207...210),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "foo="
+        ),
+        CallNode(212...217)(
+          LocalVariableReadNode(212...213)(:a, 0),
+          (213...214),
+          (214...217),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "bar="
+        )],
+       (219...220),
+       ArrayNode(221...227)(
+         [IntegerNode(222...223)(), IntegerNode(225...226)()],
+         (221...222),
+         (226...227)
+       ),
+       (204...205),
+       (217...218)
+     ),
+     MultiWriteNode(229...252)(
+       [CallNode(229...236)(
+          LocalVariableReadNode(229...230)(:a, 0),
+          nil,
+          (230...236),
+          (230...231),
+          ArgumentsNode(231...235)(
+            [SplatNode(231...235)(
+               (231...232),
+               LocalVariableReadNode(232...235)(:foo, 0)
+             )]
+          ),
+          (235...236),
+          nil,
+          0,
+          "[]="
+        ),
+        CallNode(238...242)(
+          LocalVariableReadNode(238...239)(:a, 0),
+          nil,
+          (239...242),
+          (239...240),
+          ArgumentsNode(240...241)([IntegerNode(240...241)()]),
+          (241...242),
+          nil,
+          0,
+          "[]="
+        )],
+       (244...245),
+       ArrayNode(246...252)(
+         [IntegerNode(247...248)(), IntegerNode(250...251)()],
+         (246...247),
+         (251...252)
+       ),
+       (228...229),
+       (242...243)
+     ),
+     MultiWriteNode(254...274)(
+       [CallNode(254...258)(
+          LocalVariableReadNode(254...255)(:a, 0),
+          nil,
+          (255...258),
+          (255...256),
+          ArgumentsNode(256...257)([IntegerNode(256...257)()]),
+          (257...258),
+          nil,
+          0,
+          "[]="
+        ),
+        CallNode(260...264)(
+          LocalVariableReadNode(260...261)(:a, 0),
+          nil,
+          (261...264),
+          (261...262),
+          ArgumentsNode(262...263)([IntegerNode(262...263)()]),
+          (263...264),
+          nil,
+          0,
+          "[]="
+        )],
+       (266...267),
+       ArrayNode(268...274)(
+         [IntegerNode(269...270)(), IntegerNode(272...273)()],
+         (268...269),
+         (273...274)
+       ),
+       (253...254),
+       (264...265)
+     ),
+     MultiWriteNode(276...287)(
+       [SplatNode(276...282)(
+          (276...277),
+          CallNode(277...282)(
+            LocalVariableReadNode(277...278)(:c, 0),
+            (278...279),
+            (279...282),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "foo="
+          )
+        )],
+       (284...285),
+       IntegerNode(286...287)(),
+       (275...276),
+       (282...283)
+     ),
+     ConstantPathWriteNode(288...301)(
+       ConstantPathNode(288...293)(
+         nil,
+         ConstantReadNode(290...293)(),
+         (288...290)
+       ),
+       (294...295),
+       ConstantPathNode(296...301)(
+         nil,
+         ConstantReadNode(298...301)(),
+         (296...298)
+       )
+     ),
+     ClassVariableWriteNode(302...309)(
+       (302...305),
+       IntegerNode(308...309)(),
+       (306...307)
+     ),
+     InstanceVariableWriteNode(310...316)(
+       (310...312),
+       IntegerNode(315...316)(),
+       (313...314)
+     ),
+     ConstantPathWriteNode(317...326)(
+       ConstantReadNode(317...322)(),
+       (323...324),
+       IntegerNode(325...326)()
+     ),
+     ConstantPathWriteNode(327...350)(
+       ConstantPathNode(327...346)(
+         ConstantPathNode(327...339)(
+           ConstantReadNode(327...331)(),
+           ConstantReadNode(333...339)(),
+           (331...333)
+         ),
+         ConstantReadNode(341...346)(),
+         (339...341)
+       ),
+       (347...348),
+       IntegerNode(349...350)()
+     ),
+     LocalVariableWriteNode(351...367)(
+       :a,
+       0,
+       ParenthesesNode(355...367)(
+         StatementsNode(357...366)(
+           [MultiWriteNode(357...366)(
+              [LocalVariableWriteNode(357...358)(:b, 0, nil, (357...358), nil),
+               LocalVariableWriteNode(360...361)(
+                 :c,
+                 0,
+                 nil,
+                 (360...361),
+                 nil
+               )],
+              (363...364),
+              IntegerNode(365...366)(),
+              (356...357),
+              (361...362)
+            )]
+         ),
+         (355...356),
+         (366...367)
+       ),
+       (351...352),
+       (353...354)
+     ),
+     LocalVariableWriteNode(368...373)(
+       :a,
+       0,
+       IntegerNode(372...373)(),
+       (368...369),
+       (370...371)
+     ),
+     LocalVariableWriteNode(374...385)(
+       :foo,
+       0,
+       CallNode(380...385)(
+         nil,
+         nil,
+         (380...383),
+         (383...384),
+         nil,
+         (384...385),
+         nil,
+         0,
+         "foo"
+       ),
+       (374...377),
+       (378...379)
+     ),
+     CallNode(386...395)(
+       LocalVariableReadNode(386...389)(:foo, 0),
+       (389...390),
+       (390...393),
+       (393...394),
+       nil,
+       (394...395),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(396...409)(
+       LocalVariableReadNode(396...399)(:foo, 0),
+       (399...400),
+       (400...403),
+       (403...404),
+       ArgumentsNode(404...408)(
+         [IntegerNode(404...405)(), IntegerNode(407...408)()]
+       ),
+       (408...409),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(410...421)(
+       LocalVariableReadNode(410...413)(:foo, 0),
+       (413...414),
+       (414...417),
+       nil,
+       ArgumentsNode(417...421)([TrueNode(417...421)()]),
+       nil,
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(422...441)(
+       LocalVariableReadNode(422...425)(:foo, 0),
+       nil,
+       (425...433),
+       (425...426),
+       ArgumentsNode(426...441)(
+         [SplatNode(426...432)(
+            (426...427),
+            CallNode(427...432)(
+              nil,
+              nil,
+              (427...432),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "index"
+            )
+          ),
+          CallNode(436...441)(
+            nil,
+            nil,
+            (436...441),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "value"
+          )]
+       ),
+       (432...433),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(442...459)(
+       LocalVariableReadNode(442...445)(:foo, 0),
+       nil,
+       (445...451),
+       (445...446),
+       ArgumentsNode(446...459)(
+         [RangeNode(446...450)(
+            IntegerNode(446...447)(),
+            IntegerNode(449...450)(),
+            (447...449),
+            0
+          ),
+          CallNode(454...459)(
+            nil,
+            nil,
+            (454...459),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "value"
+          )]
+       ),
+       (450...451),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(460...469)(
+       LocalVariableReadNode(460...463)(:foo, 0),
+       nil,
+       (463...465),
+       (463...464),
+       ArgumentsNode(468...469)([IntegerNode(468...469)()]),
+       (464...465),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(470...487)(
+       LocalVariableReadNode(470...473)(:foo, 0),
+       nil,
+       (473...479),
+       (473...474),
+       ArgumentsNode(474...487)(
+         [LocalVariableReadNode(474...475)(:a, 0),
+          LocalVariableReadNode(477...478)(:b, 0),
+          CallNode(482...487)(
+            nil,
+            nil,
+            (482...487),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "value"
+          )]
+       ),
+       (478...479),
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(488...506)(
+       LocalVariableReadNode(488...491)(:foo, 0),
+       nil,
+       (491...498),
+       (491...492),
+       ArgumentsNode(492...506)(
+         [CallNode(492...497)(
+            nil,
+            nil,
+            (492...497),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "index"
+          ),
+          CallNode(501...506)(
+            nil,
+            nil,
+            (501...506),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "value"
+          )]
+       ),
+       (497...498),
+       nil,
+       0,
+       "[]="
+     ),
+     LocalVariableWriteNode(507...514)(
+       :x,
+       0,
+       StringNode(511...514)((511...513), (513...513), (513...514), ""),
+       (507...508),
+       (509...510)
+     ),
+     CallNode(515...522)(
+       LocalVariableReadNode(515...516)(:x, 0),
+       (516...517),
+       (517...518),
+       nil,
+       ArgumentsNode(519...522)(
+         [StringNode(519...522)((519...521), (521...521), (521...522), "")]
+       ),
+       nil,
+       nil,
+       0,
+       "x="
+     ),
+     CallNode(523...535)(
+       LocalVariableReadNode(523...524)(:x, 0),
+       nil,
+       (524...529),
+       (524...525),
+       ArgumentsNode(525...535)(
+         [StringNode(525...528)((525...527), (527...527), (527...528), ""),
+          CallNode(532...535)(
+            nil,
+            nil,
+            (532...535),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       (528...529),
+       nil,
+       0,
+       "[]="
+     ),
+     CallOperatorOrWriteNode(536...550)(
+       CallNode(536...542)(
+         LocalVariableReadNode(536...537)(:a, 0),
+         nil,
+         (537...542),
+         (537...538),
+         ArgumentsNode(538...541)(
+           [StringNode(538...541)((538...540), (540...540), (540...541), "")]
+         ),
+         (541...542),
+         nil,
+         0,
+         "[]="
+       ),
+       CallNode(547...550)(
+         nil,
+         nil,
+         (547...550),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       (543...546)
+     ),
+     InstanceVariableOperatorOrWriteNode(551...561)(
+       (551...553),
+       (554...557),
+       StringNode(558...561)((558...560), (560...560), (560...561), "")
+     ),
+     LocalVariableWriteNode(562...591)(
+       :x,
+       0,
+       InterpolatedStringNode(566...591)(
+         (566...576),
+         [StringNode(577...579)(nil, (577...579), nil, "  "),
+          EmbeddedStatementsNode(579...582)((579...581), nil, (581...582)),
+          StringNode(582...583)(nil, (582...583), nil, "\n")],
+         (583...591)
+       ),
+       (562...563),
+       (564...565)
+     ),
+     CallNode(591...620)(
+       LocalVariableReadNode(591...592)(:x, 0),
+       (592...593),
+       (593...594),
+       nil,
+       ArgumentsNode(595...620)(
+         [InterpolatedStringNode(595...620)(
+            (595...605),
+            [StringNode(606...608)(nil, (606...608), nil, "  "),
+             EmbeddedStatementsNode(608...611)((608...610), nil, (610...611)),
+             StringNode(611...612)(nil, (611...612), nil, "\n")],
+            (612...620)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "x="
+     ),
+     CallNode(620...651)(
+       LocalVariableReadNode(620...621)(:x, 0),
+       nil,
+       (621...623),
+       (621...622),
+       ArgumentsNode(626...651)(
+         [InterpolatedStringNode(626...651)(
+            (626...636),
+            [StringNode(637...639)(nil, (637...639), nil, "  "),
+             EmbeddedStatementsNode(639...642)((639...641), nil, (641...642)),
+             StringNode(642...643)(nil, (642...643), nil, "\n")],
+            (643...651)
+          )]
+       ),
+       (622...623),
+       nil,
+       0,
+       "[]="
+     ),
+     CallOperatorOrWriteNode(651...672)(
+       CallNode(651...664)(
+         LocalVariableReadNode(651...652)(:a, 0),
+         nil,
+         (652...664),
+         (652...653),
+         ArgumentsNode(653...687)(
+           [InterpolatedStringNode(653...687)(
+              (653...663),
+              [StringNode(673...675)(nil, (673...675), nil, "  "),
+               EmbeddedStatementsNode(675...678)(
+                 (675...677),
+                 nil,
+                 (677...678)
+               ),
+               StringNode(678...679)(nil, (678...679), nil, "\n")],
+              (679...687)
+            )]
+         ),
+         (663...664),
+         nil,
+         0,
+         "[]="
+       ),
+       CallNode(669...672)(
+         nil,
+         nil,
+         (669...672),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       (665...668)
+     ),
+     InstanceVariableOperatorOrWriteNode(687...719)(
+       (687...689),
+       (690...693),
+       InterpolatedStringNode(694...719)(
+         (694...704),
+         [StringNode(705...707)(nil, (705...707), nil, "  "),
+          EmbeddedStatementsNode(707...710)((707...709), nil, (709...710)),
+          StringNode(710...711)(nil, (710...711), nil, "\n")],
+         (711...719)
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/block.txt b/test/yarp/snapshots/unparser/corpus/literal/block.txt
new file mode 100644
index 0000000000..7d4bd2c4e6
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/block.txt
@@ -0,0 +1,1286 @@
+ProgramNode(0...737)(
+  [],
+  StatementsNode(0...737)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...7)([], nil, nil, (4...5), (6...7)),
+       0,
+       "foo"
+     ),
+     CallNode(8...19)(
+       nil,
+       nil,
+       (8...11),
+       nil,
+       nil,
+       nil,
+       BlockNode(12...19)(
+         [:a],
+         BlockParametersNode(14...17)(
+           ParametersNode(15...16)(
+             [RequiredParameterNode(15...16)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (14...15),
+           (16...17)
+         ),
+         nil,
+         (12...13),
+         (18...19)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(20...32)(
+       nil,
+       nil,
+       (20...23),
+       nil,
+       nil,
+       nil,
+       BlockNode(24...32)(
+         [:a],
+         BlockParametersNode(26...30)(
+           ParametersNode(27...29)(
+             [RequiredParameterNode(27...28)(:a)],
+             [],
+             [],
+             RestParameterNode(28...29)((28...29), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (26...27),
+           (29...30)
+         ),
+         nil,
+         (24...25),
+         (31...32)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(33...48)(
+       nil,
+       nil,
+       (33...36),
+       nil,
+       nil,
+       nil,
+       BlockNode(37...48)(
+         [:a, :x],
+         BlockParametersNode(39...46)(
+           ParametersNode(40...42)(
+             [RequiredParameterNode(40...41)(:a)],
+             [],
+             [],
+             RestParameterNode(41...42)((41...42), nil),
+             [],
+             nil,
+             nil
+           ),
+           [(44...45)],
+           (39...40),
+           (45...46)
+         ),
+         nil,
+         (37...38),
+         (47...48)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(49...63)(
+       nil,
+       nil,
+       (49...52),
+       nil,
+       nil,
+       nil,
+       BlockNode(53...63)(
+         [:a, :b],
+         BlockParametersNode(55...61)(
+           ParametersNode(56...60)(
+             [RequiredParameterNode(56...57)(:a),
+              RequiredParameterNode(59...60)(:b)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (55...56),
+           (60...61)
+         ),
+         nil,
+         (53...54),
+         (62...63)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(64...80)(
+       nil,
+       nil,
+       (64...67),
+       (67...68),
+       ArgumentsNode(68...69)([IntegerNode(68...69)()]),
+       (69...70),
+       BlockNode(71...80)(
+         [],
+         nil,
+         StatementsNode(75...78)([NilNode(75...78)()]),
+         (71...72),
+         (79...80)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(81...102)(
+       nil,
+       nil,
+       (81...84),
+       nil,
+       nil,
+       nil,
+       BlockNode(85...102)(
+         [:a, :b],
+         BlockParametersNode(87...94)(
+           ParametersNode(88...93)(
+             [RequiredParameterNode(88...89)(:a)],
+             [],
+             [],
+             RestParameterNode(91...93)((91...92), (92...93)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (87...88),
+           (93...94)
+         ),
+         StatementsNode(97...100)([NilNode(97...100)()]),
+         (85...86),
+         (101...102)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(103...123)(
+       nil,
+       nil,
+       (103...106),
+       nil,
+       nil,
+       nil,
+       BlockNode(107...123)(
+         [:a, :*],
+         BlockParametersNode(109...115)(
+           ParametersNode(110...114)(
+             [RequiredParameterNode(110...111)(:a)],
+             [],
+             [],
+             RestParameterNode(113...114)((113...114), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (109...110),
+           (114...115)
+         ),
+         StatementsNode(118...121)([NilNode(118...121)()]),
+         (107...108),
+         (122...123)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(124...137)(
+       nil,
+       nil,
+       (124...127),
+       nil,
+       nil,
+       nil,
+       BlockNode(128...137)(
+         [],
+         nil,
+         StatementsNode(132...135)(
+           [CallNode(132...135)(
+              nil,
+              nil,
+              (132...135),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (128...129),
+         (136...137)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(138...165)(
+       CallNode(138...141)(
+         nil,
+         nil,
+         (138...141),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (141...142),
+       (142...145),
+       nil,
+       nil,
+       nil,
+       BlockNode(146...165)(
+         [:a, :b, :c],
+         BlockParametersNode(148...159)(
+           ParametersNode(149...158)(
+             [RequiredDestructuredParameterNode(149...155)(
+                [RequiredParameterNode(150...151)(:a),
+                 RequiredParameterNode(153...154)(:b)],
+                (149...150),
+                (154...155)
+              ),
+              RequiredParameterNode(157...158)(:c)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (148...149),
+           (158...159)
+         ),
+         StatementsNode(162...163)(
+           [CallNode(162...163)(
+              nil,
+              nil,
+              (162...163),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "d"
+            )]
+         ),
+         (146...147),
+         (164...165)
+       ),
+       0,
+       "bar"
+     ),
+     CallNode(166...185)(
+       CallNode(166...169)(
+         nil,
+         nil,
+         (166...169),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (169...170),
+       (170...173),
+       nil,
+       nil,
+       nil,
+       BlockNode(174...185)(
+         [:a, :b],
+         BlockParametersNode(176...183)(
+           ParametersNode(177...179)(
+             [],
+             [],
+             [],
+             RestParameterNode(177...179)((177...178), (178...179)),
+             [],
+             nil,
+             nil
+           ),
+           [(181...182)],
+           (176...177),
+           (182...183)
+         ),
+         nil,
+         (174...175),
+         (184...185)
+       ),
+       0,
+       "bar"
+     ),
+     CallNode(186...204)(
+       CallNode(186...189)(
+         nil,
+         nil,
+         (186...189),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (189...190),
+       (190...193),
+       nil,
+       nil,
+       nil,
+       BlockNode(194...204)(
+         [:a, :b],
+         BlockParametersNode(196...202)(
+           ParametersNode(197...198)(
+             [RequiredParameterNode(197...198)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [(200...201)],
+           (196...197),
+           (201...202)
+         ),
+         nil,
+         (194...195),
+         (203...204)
+       ),
+       0,
+       "bar"
+     ),
+     CallNode(205...225)(
+       CallNode(205...208)(
+         nil,
+         nil,
+         (205...208),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (208...209),
+       (209...212),
+       nil,
+       nil,
+       nil,
+       BlockNode(213...225)(
+         [:a, :b],
+         BlockParametersNode(215...223)(
+           nil,
+           [(218...219), (221...222)],
+           (215...216),
+           (222...223)
+         ),
+         nil,
+         (213...214),
+         (224...225)
+       ),
+       0,
+       "bar"
+     ),
+     CallNode(226...245)(
+       CallNode(226...229)(
+         nil,
+         nil,
+         (226...229),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (229...230),
+       (230...233),
+       nil,
+       nil,
+       nil,
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diff --git a/test/yarp/snapshots/unparser/corpus/literal/case.txt b/test/yarp/snapshots/unparser/corpus/literal/case.txt
new file mode 100644
index 0000000000..3a3041c0b6
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/case.txt
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new file mode 100644
index 0000000000..eee58beb4c
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new file mode 100644
index 0000000000..182bddab60
--- /dev/null
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new file mode 100644
index 0000000000..dab4a983c9
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diff --git a/test/yarp/snapshots/unparser/corpus/literal/defined.txt b/test/yarp/snapshots/unparser/corpus/literal/defined.txt
new file mode 100644
index 0000000000..1ea9cb9d87
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/defined.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...56)(
+  [:a, :b],
+  StatementsNode(0...56)(
+    [DefinedNode(0...14)(
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+       InstanceVariableReadNode(9...13)(),
+       (13...14),
+       (0...8)
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+              (46...47),
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+                (53...54)
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+            )]
+         ),
+         (38...39),
+         (54...55)
+       ),
+       (55...56),
+       (29...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/defs.txt b/test/yarp/snapshots/unparser/corpus/literal/defs.txt
new file mode 100644
index 0000000000..94a86678dc
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/defs.txt
@@ -0,0 +1,297 @@
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diff --git a/test/yarp/snapshots/unparser/corpus/literal/dstr.txt b/test/yarp/snapshots/unparser/corpus/literal/dstr.txt
new file mode 100644
index 0000000000..221a8939a7
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/dstr.txt
@@ -0,0 +1,205 @@
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+        EmbeddedVariableNode(161...164)(
+          (161...162),
+          InstanceVariableReadNode(162...164)()
+        )],
+       (164...165)
+     ),
+     InterpolatedStringNode(166...173)(
+       (166...167),
+       [StringNode(167...168)(nil, (167...168), nil, "a"),
+        EmbeddedVariableNode(168...172)(
+          (168...169),
+          ClassVariableReadNode(169...172)()
+        )],
+       (172...173)
+     ),
+     IfNode(174...225)(
+       (174...176),
+       TrueNode(177...181)(),
+       StatementsNode(184...222)(
+         [ReturnNode(184...222)(
+            (184...190),
+            ArgumentsNode(191...222)(
+              [InterpolatedStringNode(191...222)(
+                 (191...201),
+                 [StringNode(202...206)(nil, (202...206), nil, "    "),
+                  EmbeddedStatementsNode(206...211)(
+                    (206...208),
+                    StatementsNode(208...210)([IntegerNode(208...210)()]),
+                    (210...211)
+                  ),
+                  StringNode(211...212)(nil, (211...212), nil, "\n")],
+                 (212...222)
+               )]
+            )
+          )]
+       ),
+       nil,
+       (222...225)
+     ),
+     CallNode(226...241)(
+       nil,
+       nil,
+       (226...229),
+       (229...230),
+       ArgumentsNode(230...259)(
+         [InterpolatedStringNode(230...259)(
+            (230...240),
+            [StringNode(242...244)(nil, (242...244), nil, "  "),
+             EmbeddedStatementsNode(244...250)(
+               (244...246),
+               StatementsNode(246...249)(
+                 [CallNode(246...249)(
+                    nil,
+                    nil,
+                    (246...249),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "bar"
+                  )]
+               ),
+               (249...250)
+             ),
+             StringNode(250...251)(nil, (250...251), nil, "\n")],
+            (251...259)
+          )]
+       ),
+       (240...241),
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(259...299)(
+       nil,
+       nil,
+       (259...262),
+       (262...263),
+       ArgumentsNode(263...298)(
+         [InterpolatedStringNode(263...298)(
+            (263...273),
+            [StringNode(281...283)(nil, (281...283), nil, "  "),
+             EmbeddedStatementsNode(283...289)(
+               (283...285),
+               StatementsNode(285...288)(
+                 [CallNode(285...288)(
+                    nil,
+                    nil,
+                    (285...288),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "bar"
+                  )]
+               ),
+               (288...289)
+             ),
+             StringNode(289...290)(nil, (289...290), nil, "\n")],
+            (290...298)
+          )]
+       ),
+       (273...274),
+       BlockNode(275...299)(
+         [:x],
+         BlockParametersNode(277...280)(
+           ParametersNode(278...279)(
+             [RequiredParameterNode(278...279)(:x)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (277...278),
+           (279...280)
+         ),
+         nil,
+         (275...276),
+         (298...299)
+       ),
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/empty.txt b/test/yarp/snapshots/unparser/corpus/literal/empty.txt
new file mode 100644
index 0000000000..bd3eaf5ff4
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/empty.txt
@@ -0,0 +1 @@
+ProgramNode(0...0)([], StatementsNode(0...0)([]))
diff --git a/test/yarp/snapshots/unparser/corpus/literal/empty_begin.txt b/test/yarp/snapshots/unparser/corpus/literal/empty_begin.txt
new file mode 100644
index 0000000000..d998f704cf
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/empty_begin.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...2)(
+  [],
+  StatementsNode(0...2)([ParenthesesNode(0...2)(nil, (0...1), (1...2))])
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/flipflop.txt b/test/yarp/snapshots/unparser/corpus/literal/flipflop.txt
new file mode 100644
index 0000000000..b4837b7dc8
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/flipflop.txt
@@ -0,0 +1,149 @@
+ProgramNode(0...68)(
+  [],
+  StatementsNode(0...68)(
+    [IfNode(0...33)(
+       (0...2),
+       ParenthesesNode(3...23)(
+         StatementsNode(4...22)(
+           [RangeNode(4...22)(
+              ParenthesesNode(4...12)(
+                StatementsNode(5...11)(
+                  [CallNode(5...11)(
+                     CallNode(5...6)(
+                       nil,
+                       nil,
+                       (5...6),
+                       nil,
+                       nil,
+                       nil,
+                       nil,
+                       0,
+                       "i"
+                     ),
+                     nil,
+                     (7...9),
+                     nil,
+                     ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+                     nil,
+                     nil,
+                     0,
+                     "=="
+                   )]
+                ),
+                (4...5),
+                (11...12)
+              ),
+              ParenthesesNode(14...22)(
+                StatementsNode(15...21)(
+                  [CallNode(15...21)(
+                     CallNode(15...16)(
+                       nil,
+                       nil,
+                       (15...16),
+                       nil,
+                       nil,
+                       nil,
+                       nil,
+                       0,
+                       "i"
+                     ),
+                     nil,
+                     (17...19),
+                     nil,
+                     ArgumentsNode(20...21)([IntegerNode(20...21)()]),
+                     nil,
+                     nil,
+                     0,
+                     "=="
+                   )]
+                ),
+                (14...15),
+                (21...22)
+              ),
+              (12...14),
+              0
+            )]
+         ),
+         (3...4),
+         (22...23)
+       ),
+       StatementsNode(26...29)(
+         [CallNode(26...29)(nil, nil, (26...29), nil, nil, nil, nil, 0, "foo")]
+       ),
+       nil,
+       (30...33)
+     ),
+     IfNode(34...68)(
+       (34...36),
+       ParenthesesNode(37...58)(
+         StatementsNode(38...57)(
+           [RangeNode(38...57)(
+              ParenthesesNode(38...46)(
+                StatementsNode(39...45)(
+                  [CallNode(39...45)(
+                     CallNode(39...40)(
+                       nil,
+                       nil,
+                       (39...40),
+                       nil,
+                       nil,
+                       nil,
+                       nil,
+                       0,
+                       "i"
+                     ),
+                     nil,
+                     (41...43),
+                     nil,
+                     ArgumentsNode(44...45)([IntegerNode(44...45)()]),
+                     nil,
+                     nil,
+                     0,
+                     "=="
+                   )]
+                ),
+                (38...39),
+                (45...46)
+              ),
+              ParenthesesNode(49...57)(
+                StatementsNode(50...56)(
+                  [CallNode(50...56)(
+                     CallNode(50...51)(
+                       nil,
+                       nil,
+                       (50...51),
+                       nil,
+                       nil,
+                       nil,
+                       nil,
+                       0,
+                       "i"
+                     ),
+                     nil,
+                     (52...54),
+                     nil,
+                     ArgumentsNode(55...56)([IntegerNode(55...56)()]),
+                     nil,
+                     nil,
+                     0,
+                     "=="
+                   )]
+                ),
+                (49...50),
+                (56...57)
+              ),
+              (46...49),
+              1
+            )]
+         ),
+         (37...38),
+         (57...58)
+       ),
+       StatementsNode(61...64)(
+         [CallNode(61...64)(nil, nil, (61...64), nil, nil, nil, nil, 0, "foo")]
+       ),
+       nil,
+       (65...68)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/for.txt b/test/yarp/snapshots/unparser/corpus/literal/for.txt
new file mode 100644
index 0000000000..4fdb3e3d73
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/for.txt
@@ -0,0 +1,130 @@
+ProgramNode(0...119)(
+  [:a, :b],
+  StatementsNode(0...119)(
+    [CallNode(0...30)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...29)(
+         [ForNode(4...29)(
+            MultiWriteNode(8...9)(
+              [LocalVariableWriteNode(8...9)(:a, 0, nil, (8...9), nil)],
+              nil,
+              nil,
+              nil,
+              nil
+            ),
+            CallNode(13...16)(
+              nil,
+              nil,
+              (13...16),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            StatementsNode(22...25)(
+              [CallNode(22...25)(
+                 nil,
+                 nil,
+                 (22...25),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "baz"
+               )]
+            ),
+            (4...7),
+            (10...12),
+            (17...19),
+            (26...29)
+          )]
+       ),
+       (29...30),
+       nil,
+       0,
+       "bar"
+     ),
+     ForNode(31...56)(
+       MultiWriteNode(35...36)(
+         [LocalVariableWriteNode(35...36)(:a, 0, nil, (35...36), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       CallNode(40...43)(nil, nil, (40...43), nil, nil, nil, nil, 0, "bar"),
+       StatementsNode(49...52)(
+         [CallNode(49...52)(nil, nil, (49...52), nil, nil, nil, nil, 0, "baz")]
+       ),
+       (31...34),
+       (37...39),
+       (44...46),
+       (53...56)
+     ),
+     ForNode(57...88)(
+       MultiWriteNode(61...68)(
+         [LocalVariableWriteNode(62...63)(:a, 0, nil, (62...63), nil),
+          SplatNode(65...67)(
+            (65...66),
+            LocalVariableWriteNode(66...67)(:b, 0, nil, (66...67), nil)
+          )],
+         nil,
+         nil,
+         (61...62),
+         (67...68)
+       ),
+       CallNode(72...75)(nil, nil, (72...75), nil, nil, nil, nil, 0, "bar"),
+       StatementsNode(81...84)(
+         [CallNode(81...84)(nil, nil, (81...84), nil, nil, nil, nil, 0, "baz")]
+       ),
+       (57...60),
+       (69...71),
+       (76...78),
+       (85...88)
+     ),
+     ForNode(89...119)(
+       MultiWriteNode(93...99)(
+         [LocalVariableWriteNode(94...95)(:a, 0, nil, (94...95), nil),
+          LocalVariableWriteNode(97...98)(:b, 0, nil, (97...98), nil)],
+         nil,
+         nil,
+         (93...94),
+         (98...99)
+       ),
+       CallNode(103...106)(
+         nil,
+         nil,
+         (103...106),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       StatementsNode(112...115)(
+         [CallNode(112...115)(
+            nil,
+            nil,
+            (112...115),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "baz"
+          )]
+       ),
+       (89...92),
+       (100...102),
+       (107...109),
+       (116...119)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/hookexe.txt b/test/yarp/snapshots/unparser/corpus/literal/hookexe.txt
new file mode 100644
index 0000000000..9cd7da16bf
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/hookexe.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [PreExecutionNode(0...15)(
+       StatementsNode(10...13)(
+         [CallNode(10...13)(nil, nil, (10...13), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (0...5),
+       (6...7),
+       (14...15)
+     ),
+     CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "bar"),
+     PostExecutionNode(20...33)(
+       StatementsNode(28...31)(
+         [CallNode(28...31)(nil, nil, (28...31), nil, nil, nil, nil, 0, "baz")]
+       ),
+       (20...23),
+       (24...25),
+       (32...33)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/if.txt b/test/yarp/snapshots/unparser/corpus/literal/if.txt
new file mode 100644
index 0000000000..32f5fed1ed
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/if.txt
@@ -0,0 +1,201 @@
+ProgramNode(0...246)(
+  [:foo, :pair],
+  StatementsNode(0...246)(
+    [IfNode(0...18)(
+       (0...2),
+       RegularExpressionNode(3...8)((3...4), (4...7), (7...8), "foo", 0),
+       StatementsNode(11...14)(
+         [CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       (15...18)
+     ),
+     IfNode(19...31)(
+       (19...21),
+       IntegerNode(22...23)(),
+       StatementsNode(26...27)([IntegerNode(26...27)()]),
+       nil,
+       (28...31)
+     ),
+     IfNode(32...53)(
+       (32...34),
+       IntegerNode(35...36)(),
+       StatementsNode(39...40)([IntegerNode(39...40)()]),
+       ElseNode(41...53)(
+         (41...45),
+         StatementsNode(48...49)([IntegerNode(48...49)()]),
+         (50...53)
+       ),
+       (50...53)
+     ),
+     UnlessNode(54...72)(
+       (54...60),
+       IntegerNode(61...62)(),
+       StatementsNode(65...68)([NilNode(65...68)()]),
+       nil,
+       (69...72)
+     ),
+     UnlessNode(73...89)(
+       (73...79),
+       IntegerNode(80...81)(),
+       StatementsNode(84...85)([IntegerNode(84...85)()]),
+       nil,
+       (86...89)
+     ),
+     IfNode(90...100)(
+       (90...92),
+       CallNode(93...96)(nil, nil, (93...96), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       nil,
+       (97...100)
+     ),
+     ModuleNode(102...133)(
+       [:foo],
+       (102...108),
+       ConstantReadNode(109...110)(),
+       StatementsNode(113...129)(
+         [IfNode(113...129)(
+            (123...125),
+            LocalVariableReadNode(126...129)(:foo, 0),
+            StatementsNode(113...122)(
+              [LocalVariableWriteNode(113...122)(
+                 :foo,
+                 0,
+                 CallNode(119...122)(
+                   nil,
+                   nil,
+                   (119...122),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (113...116),
+                 (117...118)
+               )]
+            ),
+            nil,
+            nil
+          )]
+       ),
+       (130...133)
+     ),
+     ModuleNode(135...170)(
+       [:foo],
+       (135...141),
+       ConstantReadNode(142...143)(),
+       StatementsNode(146...166)(
+         [UnlessNode(146...166)(
+            (156...162),
+            LocalVariableReadNode(163...166)(:foo, 0),
+            StatementsNode(146...155)(
+              [LocalVariableWriteNode(146...155)(
+                 :foo,
+                 0,
+                 CallNode(152...155)(
+                   nil,
+                   nil,
+                   (152...155),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (146...149),
+                 (150...151)
+               )]
+            ),
+            nil,
+            nil
+          )]
+       ),
+       (167...170)
+     ),
+     UnlessNode(171...197)(
+       (171...177),
+       CallNode(178...181)(
+         nil,
+         nil,
+         (178...181),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       StatementsNode(184...193)(
+         [LocalVariableWriteNode(184...193)(
+            :foo,
+            0,
+            CallNode(190...193)(
+              nil,
+              nil,
+              (190...193),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            (184...187),
+            (188...189)
+          )]
+       ),
+       nil,
+       (194...197)
+     ),
+     IfNode(198...246)(
+       (198...200),
+       CallNode(201...222)(
+         nil,
+         nil,
+         (201...204),
+         nil,
+         nil,
+         nil,
+         BlockNode(205...222)(
+           [:pair],
+           BlockParametersNode(207...213)(
+             ParametersNode(208...212)(
+               [RequiredParameterNode(208...212)(:pair)],
+               [],
+               [],
+               nil,
+               [],
+               nil,
+               nil
+             ),
+             [],
+             (207...208),
+             (212...213)
+           ),
+           StatementsNode(216...220)(
+             [LocalVariableReadNode(216...220)(:pair, 0)]
+           ),
+           (205...206),
+           (221...222)
+         ),
+         0,
+         "foo"
+       ),
+       StatementsNode(225...242)(
+         [LocalVariableWriteNode(225...236)(
+            :pair,
+            0,
+            SymbolNode(232...236)((232...233), (233...236), nil, "foo"),
+            (225...229),
+            (230...231)
+          ),
+          LocalVariableReadNode(239...242)(:foo, 0)]
+       ),
+       nil,
+       (243...246)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/kwbegin.txt b/test/yarp/snapshots/unparser/corpus/literal/kwbegin.txt
new file mode 100644
index 0000000000..b7ed53b276
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/kwbegin.txt
@@ -0,0 +1,379 @@
+ProgramNode(0...530)(
+  [:foo, :bar, :exception],
+  StatementsNode(0...530)(
+    [BeginNode(0...16)(
+       (0...5),
+       nil,
+       RescueNode(6...12)((6...12), [], nil, nil, nil, nil),
+       nil,
+       nil,
+       (13...16)
+     ),
+     BeginNode(18...34)(
+       (18...23),
+       nil,
+       nil,
+       nil,
+       EnsureNode(24...34)((24...30), nil, (31...34)),
+       (31...34)
+     ),
+     BeginNode(36...49)(
+       (36...41),
+       StatementsNode(44...45)(
+         [CallNode(44...45)(nil, nil, (44...45), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       nil,
+       (46...49)
+     ),
+     BeginNode(51...75)(
+       (51...56),
+       StatementsNode(59...60)(
+         [CallNode(59...60)(nil, nil, (59...60), nil, nil, nil, nil, 0, "a")]
+       ),
+       RescueNode(61...71)(
+         (61...67),
+         [],
+         nil,
+         nil,
+         StatementsNode(70...71)(
+           [CallNode(70...71)(nil, nil, (70...71), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (72...75)
+     ),
+     BeginNode(77...105)(
+       (77...82),
+       StatementsNode(85...90)(
+         [CallNode(85...86)(nil, nil, (85...86), nil, nil, nil, nil, 0, "a"),
+          CallNode(89...90)(nil, nil, (89...90), nil, nil, nil, nil, 0, "b")]
+       ),
+       RescueNode(91...101)(
+         (91...97),
+         [],
+         nil,
+         nil,
+         StatementsNode(100...101)(
+           [CallNode(100...101)(
+              nil,
+              nil,
+              (100...101),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (102...105)
+     ),
+     BeginNode(107...125)(
+       (107...112),
+       nil,
+       RescueNode(113...121)(
+         (113...119),
+         [ConstantReadNode(120...121)()],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       nil,
+       nil,
+       (122...125)
+     ),
+     BeginNode(127...152)(
+       (127...132),
+       nil,
+       RescueNode(133...148)(
+         (133...139),
+         [ConstantReadNode(140...141)()],
+         (142...144),
+         LocalVariableWriteNode(145...148)(:foo, 0, nil, (145...148), nil),
+         nil,
+         nil
+       ),
+       nil,
+       nil,
+       (149...152)
+     ),
+     BeginNode(154...204)(
+       (154...159),
+       StatementsNode(162...163)(
+         [CallNode(162...163)(
+            nil,
+            nil,
+            (162...163),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(164...189)(
+         (164...170),
+         [ConstantReadNode(171...172)()],
+         nil,
+         nil,
+         StatementsNode(175...176)(
+           [CallNode(175...176)(
+              nil,
+              nil,
+              (175...176),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         RescueNode(177...189)(
+           (177...183),
+           [ConstantReadNode(184...185)()],
+           nil,
+           nil,
+           StatementsNode(188...189)(
+             [CallNode(188...189)(
+                nil,
+                nil,
+                (188...189),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "c"
+              )]
+           ),
+           nil
+         )
+       ),
+       nil,
+       EnsureNode(190...204)(
+         (190...196),
+         StatementsNode(199...200)(
+           [CallNode(199...200)(
+              nil,
+              nil,
+              (199...200),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "d"
+            )]
+         ),
+         (201...204)
+       ),
+       (201...204)
+     ),
+     BeginNode(206...273)(
+       (206...211),
+       StatementsNode(214...250)(
+         [BeginNode(214...250)(
+            (214...219),
+            StatementsNode(224...235)(
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+               CallNode(232...235)(
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diff --git a/test/yarp/snapshots/unparser/corpus/literal/lambda.txt b/test/yarp/snapshots/unparser/corpus/literal/lambda.txt
new file mode 100644
index 0000000000..66300fd726
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/lambda.txt
@@ -0,0 +1,112 @@
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diff --git a/test/yarp/snapshots/unparser/corpus/literal/literal.txt b/test/yarp/snapshots/unparser/corpus/literal/literal.txt
new file mode 100644
index 0000000000..01e9155ec2
--- /dev/null
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+       0,
+       "-@"
+     ),
+     FloatNode(662...665)(),
+     ArrayNode(666...672)(
+       [IntegerNode(667...668)(), IntegerNode(670...671)()],
+       (666...667),
+       (671...672)
+     ),
+     ArrayNode(673...684)(
+       [IntegerNode(674...675)(),
+        ParenthesesNode(677...679)(nil, (677...678), (678...679)),
+        CallNode(681...683)(
+          nil,
+          nil,
+          (681...683),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "n2"
+        )],
+       (673...674),
+       (683...684)
+     ),
+     ArrayNode(685...688)(
+       [IntegerNode(686...687)()],
+       (685...686),
+       (687...688)
+     ),
+     ArrayNode(689...691)([], (689...690), (690...691)),
+     ArrayNode(692...702)(
+       [IntegerNode(693...694)(),
+        SplatNode(696...701)(
+          (696...697),
+          InstanceVariableReadNode(697...701)()
+        )],
+       (692...693),
+       (701...702)
+     ),
+     ArrayNode(703...713)(
+       [SplatNode(704...709)(
+          (704...705),
+          InstanceVariableReadNode(705...709)()
+        ),
+        IntegerNode(711...712)()],
+       (703...704),
+       (712...713)
+     ),
+     ArrayNode(714...728)(
+       [SplatNode(715...720)(
+          (715...716),
+          InstanceVariableReadNode(716...720)()
+        ),
+        SplatNode(722...727)(
+          (722...723),
+          InstanceVariableReadNode(723...727)()
+        )],
+       (714...715),
+       (727...728)
+     ),
+     HashNode(729...731)((729...730), [], (730...731)),
+     HashNode(732...744)(
+       (732...733),
+       [AssocNode(734...742)(
+          ParenthesesNode(734...736)(nil, (734...735), (735...736)),
+          ParenthesesNode(740...742)(nil, (740...741), (741...742)),
+          (737...739)
+        )],
+       (743...744)
+     ),
+     HashNode(745...755)(
+       (745...746),
+       [AssocNode(747...753)(
+          IntegerNode(747...748)(),
+          IntegerNode(752...753)(),
+          (749...751)
+        )],
+       (754...755)
+     ),
+     HashNode(756...774)(
+       (756...757),
+       [AssocNode(758...764)(
+          IntegerNode(758...759)(),
+          IntegerNode(763...764)(),
+          (760...762)
+        ),
+        AssocNode(766...772)(
+          IntegerNode(766...767)(),
+          IntegerNode(771...772)(),
+          (768...770)
+        )],
+       (773...774)
+     ),
+     HashNode(775...802)(
+       (775...776),
+       [AssocNode(777...794)(
+          SymbolNode(777...779)(nil, (777...778), (778...779), "a"),
+          ParenthesesNode(780...794)(
+            StatementsNode(781...793)(
+              [RescueModifierNode(781...793)(
+                 IntegerNode(781...782)(),
+                 (783...789),
+                 CallNode(790...793)(
+                   nil,
+                   nil,
+                   (790...793),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "foo"
+                 )
+               )]
+            ),
+            (780...781),
+            (793...794)
+          ),
+          nil
+        ),
+        AssocNode(796...800)(
+          SymbolNode(796...798)(nil, (796...797), (797...798), "b"),
+          IntegerNode(799...800)(),
+          nil
+        )],
+       (801...802)
+     ),
+     HashNode(803...817)(
+       (803...804),
+       [AssocNode(805...809)(
+          SymbolNode(805...807)(nil, (805...806), (806...807), "a"),
+          IntegerNode(808...809)(),
+          nil
+        ),
+        AssocNode(811...815)(
+          SymbolNode(811...813)(nil, (811...812), (812...813), "b"),
+          IntegerNode(814...815)(),
+          nil
+        )],
+       (816...817)
+     ),
+     HashNode(818...827)(
+       (818...819),
+       [AssocNode(820...825)(
+          SymbolNode(820...822)(nil, (820...821), (821...822), "a"),
+          SymbolNode(823...825)((823...824), (824...825), nil, "a"),
+          nil
+        )],
+       (826...827)
+     ),
+     HashNode(828...843)(
+       (828...829),
+       [AssocNode(830...841)(
+          InterpolatedSymbolNode(830...836)(
+            (830...832),
+            [StringNode(832...835)(nil, (832...835), nil, "a b")],
+            (835...836)
+          ),
+          IntegerNode(840...841)(),
+          (837...839)
+        )],
+       (842...843)
+     ),
+     HashNode(844...856)(
+       (844...845),
+       [AssocNode(846...854)(
+          SymbolNode(846...849)((846...847), (847...849), nil, "-@"),
+          IntegerNode(853...854)(),
+          (850...852)
+        )],
+       (855...856)
+     ),
+     InterpolatedStringNode(857...869)(
+       (857...858),
+       [EmbeddedStatementsNode(858...861)((858...860), nil, (860...861)),
+        StringNode(861...862)(nil, (861...862), nil, "\n"),
+        EmbeddedStatementsNode(862...865)((862...864), nil, (864...865)),
+        StringNode(865...868)(nil, (865...868), nil, "\n" + "a")],
+       (868...869)
+     ),
+     CallNode(870...892)(
+       nil,
+       nil,
+       (870...873),
+       nil,
+       nil,
+       nil,
+       BlockNode(874...892)(
+         [],
+         nil,
+         StatementsNode(878...890)(
+           [InterpolatedStringNode(878...890)(
+              (878...879),
+              [EmbeddedStatementsNode(879...882)(
+                 (879...881),
+                 nil,
+                 (881...882)
+               ),
+               StringNode(882...883)(nil, (882...883), nil, "\n"),
+               EmbeddedStatementsNode(883...886)(
+                 (883...885),
+                 nil,
+                 (885...886)
+               ),
+               StringNode(886...889)(nil, (886...889), nil, "\n" + "a")],
+              (889...890)
+            )]
+         ),
+         (874...875),
+         (891...892)
+       ),
+       0,
+       "foo"
+     ),
+     InterpolatedSymbolNode(893...901)(
+       (893...895),
+       [StringNode(895...900)(nil, (895...900), nil, "a\\\n" + "b")],
+       (900...901)
+     ),
+     InterpolatedXStringNode(902...916)(
+       (902...903),
+       [StringNode(903...907)(nil, (903...907), nil, "  x\n"),
+        EmbeddedStatementsNode(907...913)(
+          (907...909),
+          StatementsNode(909...912)(
+            [CallNode(909...912)(
+               nil,
+               nil,
+               (909...912),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "foo"
+             )]
+          ),
+          (912...913)
+        ),
+        StringNode(913...915)(nil, (913...915), nil, "\n" + "#")],
+       (915...916)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/module.txt b/test/yarp/snapshots/unparser/corpus/literal/module.txt
new file mode 100644
index 0000000000..c917fedd23
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/module.txt
@@ -0,0 +1,78 @@
+ProgramNode(0...106)(
+  [],
+  StatementsNode(0...106)(
+    [ModuleNode(0...12)([], (0...6), ConstantReadNode(7...8)(), nil, (9...12)),
+     ModuleNode(14...29)(
+       [],
+       (14...20),
+       ConstantPathNode(21...25)(
+         ConstantReadNode(21...22)(),
+         ConstantReadNode(24...25)(),
+         (22...24)
+       ),
+       nil,
+       (26...29)
+     ),
+     ModuleNode(31...49)(
+       [],
+       (31...37),
+       ConstantPathNode(38...45)(
+         ConstantPathNode(38...42)(
+           ConstantReadNode(38...39)(),
+           ConstantReadNode(41...42)(),
+           (39...41)
+         ),
+         ConstantReadNode(44...45)(),
+         (42...44)
+       ),
+       nil,
+       (46...49)
+     ),
+     ModuleNode(51...106)(
+       [],
+       (51...57),
+       ConstantReadNode(58...59)(),
+       StatementsNode(62...102)(
+         [CallNode(62...76)(
+            nil,
+            nil,
+            (62...69),
+            (69...70),
+            ArgumentsNode(70...75)(
+              [CallNode(70...75)(
+                 ConstantReadNode(70...71)(),
+                 (71...72),
+                 (72...75),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "new"
+               )]
+            ),
+            (75...76),
+            nil,
+            0,
+            "include"
+          ),
+          DefNode(80...102)(
+            (84...87),
+            nil,
+            nil,
+            StatementsNode(92...96)(
+              [SymbolNode(92...96)((92...93), (93...96), nil, "bar")]
+            ),
+            [],
+            (80...83),
+            nil,
+            nil,
+            nil,
+            nil,
+            (99...102)
+          )]
+       ),
+       (103...106)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/opasgn.txt b/test/yarp/snapshots/unparser/corpus/literal/opasgn.txt
new file mode 100644
index 0000000000..df1836e4c5
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/opasgn.txt
@@ -0,0 +1,429 @@
+ProgramNode(0...233)(
+  [:a, :h],
+  StatementsNode(0...233)(
+    [LocalVariableOperatorWriteNode(0...6)(
+       (0...1),
+       (2...4),
+       IntegerNode(5...6)(),
+       :a,
+       :+
+     ),
+     LocalVariableOperatorWriteNode(7...13)(
+       (7...8),
+       (9...11),
+       IntegerNode(12...13)(),
+       :a,
+       :-
+     ),
+     LocalVariableOperatorWriteNode(14...21)(
+       (14...15),
+       (16...19),
+       IntegerNode(20...21)(),
+       :a,
+       :**
+     ),
+     LocalVariableOperatorWriteNode(22...28)(
+       (22...23),
+       (24...26),
+       IntegerNode(27...28)(),
+       :a,
+       :*
+     ),
+     LocalVariableOperatorWriteNode(29...35)(
+       (29...30),
+       (31...33),
+       IntegerNode(34...35)(),
+       :a,
+       :/
+     ),
+     LocalVariableOperatorAndWriteNode(36...43)(
+       (36...37),
+       (38...41),
+       CallNode(42...43)(nil, nil, (42...43), nil, nil, nil, nil, 0, "b"),
+       :a
+     ),
+     LocalVariableOperatorOrWriteNode(44...51)(
+       (44...45),
+       (46...49),
+       IntegerNode(50...51)(),
+       :a
+     ),
+     CallNode(52...65)(
+       ParenthesesNode(52...61)(
+         StatementsNode(53...60)(
+           [LocalVariableOperatorOrWriteNode(53...60)(
+              (53...54),
+              (55...58),
+              IntegerNode(59...60)(),
+              :a
+            )]
+         ),
+         (52...53),
+         (60...61)
+       ),
+       (61...62),
+       (62...65),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "bar"
+     ),
+     CallNode(66...83)(
+       ParenthesesNode(66...76)(
+         StatementsNode(67...75)(
+           [LocalVariableOperatorOrWriteNode(67...75)(
+              (67...68),
+              (69...72),
+              HashNode(73...75)((73...74), [], (74...75)),
+              :h
+            )]
+         ),
+         (66...67),
+         (75...76)
+       ),
+       nil,
+       (76...79),
+       (76...77),
+       ArgumentsNode(77...83)(
+         [CallNode(77...78)(nil, nil, (77...78), nil, nil, nil, nil, 0, "k"),
+          CallNode(82...83)(nil, nil, (82...83), nil, nil, nil, nil, 0, "v")]
+       ),
+       (78...79),
+       nil,
+       0,
+       "[]="
+     ),
+     CallOperatorWriteNode(84...92)(
+       CallNode(84...87)(
+         LocalVariableReadNode(84...85)(:a, 0),
+         (85...86),
+         (86...87),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (88...90),
+       IntegerNode(91...92)(),
+       :+
+     ),
+     CallOperatorWriteNode(93...101)(
+       CallNode(93...96)(
+         LocalVariableReadNode(93...94)(:a, 0),
+         (94...95),
+         (95...96),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (97...99),
+       IntegerNode(100...101)(),
+       :-
+     ),
+     CallOperatorWriteNode(102...111)(
+       CallNode(102...105)(
+         LocalVariableReadNode(102...103)(:a, 0),
+         (103...104),
+         (104...105),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (106...109),
+       IntegerNode(110...111)(),
+       :**
+     ),
+     CallOperatorWriteNode(112...120)(
+       CallNode(112...115)(
+         LocalVariableReadNode(112...113)(:a, 0),
+         (113...114),
+         (114...115),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (116...118),
+       IntegerNode(119...120)(),
+       :*
+     ),
+     CallOperatorWriteNode(121...129)(
+       CallNode(121...124)(
+         LocalVariableReadNode(121...122)(:a, 0),
+         (122...123),
+         (123...124),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (125...127),
+       IntegerNode(128...129)(),
+       :/
+     ),
+     CallOperatorAndWriteNode(130...139)(
+       CallNode(130...133)(
+         LocalVariableReadNode(130...131)(:a, 0),
+         (131...132),
+         (132...133),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       (134...137),
+       CallNode(138...139)(nil, nil, (138...139), nil, nil, nil, nil, 0, "b")
+     ),
+     CallOperatorOrWriteNode(140...149)(
+       CallNode(140...143)(
+         LocalVariableReadNode(140...141)(:a, 0),
+         (141...142),
+         (142...143),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "b="
+       ),
+       IntegerNode(148...149)(),
+       (144...147)
+     ),
+     CallOperatorWriteNode(150...159)(
+       CallNode(150...154)(
+         LocalVariableReadNode(150...151)(:a, 0),
+         nil,
+         (151...154),
+         (151...152),
+         ArgumentsNode(152...153)(
+           [CallNode(152...153)(
+              nil,
+              nil,
+              (152...153),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (153...154),
+         nil,
+         0,
+         "[]="
+       ),
+       (155...157),
+       IntegerNode(158...159)(),
+       :+
+     ),
+     CallOperatorWriteNode(160...169)(
+       CallNode(160...164)(
+         LocalVariableReadNode(160...161)(:a, 0),
+         nil,
+         (161...164),
+         (161...162),
+         ArgumentsNode(162...163)(
+           [CallNode(162...163)(
+              nil,
+              nil,
+              (162...163),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (163...164),
+         nil,
+         0,
+         "[]="
+       ),
+       (165...167),
+       IntegerNode(168...169)(),
+       :-
+     ),
+     CallOperatorWriteNode(170...180)(
+       CallNode(170...174)(
+         LocalVariableReadNode(170...171)(:a, 0),
+         nil,
+         (171...174),
+         (171...172),
+         ArgumentsNode(172...173)(
+           [CallNode(172...173)(
+              nil,
+              nil,
+              (172...173),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (173...174),
+         nil,
+         0,
+         "[]="
+       ),
+       (175...178),
+       IntegerNode(179...180)(),
+       :**
+     ),
+     CallOperatorWriteNode(181...190)(
+       CallNode(181...185)(
+         LocalVariableReadNode(181...182)(:a, 0),
+         nil,
+         (182...185),
+         (182...183),
+         ArgumentsNode(183...184)(
+           [CallNode(183...184)(
+              nil,
+              nil,
+              (183...184),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (184...185),
+         nil,
+         0,
+         "[]="
+       ),
+       (186...188),
+       IntegerNode(189...190)(),
+       :*
+     ),
+     CallOperatorWriteNode(191...200)(
+       CallNode(191...195)(
+         LocalVariableReadNode(191...192)(:a, 0),
+         nil,
+         (192...195),
+         (192...193),
+         ArgumentsNode(193...194)(
+           [CallNode(193...194)(
+              nil,
+              nil,
+              (193...194),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (194...195),
+         nil,
+         0,
+         "[]="
+       ),
+       (196...198),
+       IntegerNode(199...200)(),
+       :/
+     ),
+     CallOperatorAndWriteNode(201...211)(
+       CallNode(201...205)(
+         LocalVariableReadNode(201...202)(:a, 0),
+         nil,
+         (202...205),
+         (202...203),
+         ArgumentsNode(203...204)(
+           [CallNode(203...204)(
+              nil,
+              nil,
+              (203...204),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (204...205),
+         nil,
+         0,
+         "[]="
+       ),
+       (206...209),
+       CallNode(210...211)(nil, nil, (210...211), nil, nil, nil, nil, 0, "b")
+     ),
+     CallOperatorOrWriteNode(212...222)(
+       CallNode(212...216)(
+         LocalVariableReadNode(212...213)(:a, 0),
+         nil,
+         (213...216),
+         (213...214),
+         ArgumentsNode(214...215)(
+           [CallNode(214...215)(
+              nil,
+              nil,
+              (214...215),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         (215...216),
+         nil,
+         0,
+         "[]="
+       ),
+       IntegerNode(221...222)(),
+       (217...220)
+     ),
+     CallOperatorWriteNode(223...233)(
+       CallNode(223...228)(
+         CallNode(223...226)(
+           nil,
+           nil,
+           (223...226),
+           nil,
+           nil,
+           nil,
+           nil,
+           0,
+           "foo"
+         ),
+         (226...227),
+         (227...228),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "A="
+       ),
+       (229...231),
+       IntegerNode(232...233)(),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/pattern.txt b/test/yarp/snapshots/unparser/corpus/literal/pattern.txt
new file mode 100644
index 0000000000..cc8b9242d6
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/pattern.txt
@@ -0,0 +1,291 @@
+ProgramNode(0...408)(
+  [:a, :x, :y],
+  StatementsNode(0...408)(
+    [CaseNode(0...345)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [InNode(9...38)(
+          ArrayPatternNode(12...26)(
+            ConstantReadNode(12...13)(),
+            [IntegerNode(14...15)(), IntegerNode(17...18)()],
+            SplatNode(20...22)(
+              (20...21),
+              LocalVariableWriteNode(21...22)(:a, 0, nil, (21...22), nil)
+            ),
+            [IntegerNode(24...25)()],
+            (13...14),
+            (25...26)
+          ),
+          StatementsNode(34...38)([TrueNode(34...38)()]),
+          (9...11),
+          (27...31)
+        ),
+        InNode(39...59)(
+          ArrayPatternNode(42...50)(
+            nil,
+            [IntegerNode(43...44)(), IntegerNode(46...47)()],
+            nil,
+            [],
+            (42...43),
+            (49...50)
+          ),
+          StatementsNode(58...59)(
+            [CallNode(58...59)(
+               nil,
+               nil,
+               (58...59),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "y"
+             )]
+          ),
+          (39...41),
+          (51...55)
+        ),
+        InNode(60...80)(
+          HashPatternNode(63...68)(
+            ConstantReadNode(63...64)(),
+            [AssocNode(65...67)(
+               SymbolNode(65...67)(nil, (65...66), (66...67), "x"),
+               nil,
+               nil
+             )],
+            nil,
+            (64...65),
+            (67...68)
+          ),
+          StatementsNode(76...80)([TrueNode(76...80)()]),
+          (60...62),
+          (69...73)
+        ),
+        InNode(81...101)(
+          HashPatternNode(84...89)(
+            nil,
+            [AssocNode(85...88)(
+               AssocSplatNode(85...88)(
+                 LocalVariableWriteNode(87...88)(:a, 0, nil, (87...88), nil),
+                 (85...87)
+               ),
+               nil,
+               nil
+             )],
+            nil,
+            (84...85),
+            (88...89)
+          ),
+          StatementsNode(97...101)([TrueNode(97...101)()]),
+          (81...83),
+          (90...94)
+        ),
+        InNode(102...127)(
+          IfNode(105...115)(
+            (108...110),
+            TrueNode(111...115)(),
+            StatementsNode(105...107)(
+              [HashPatternNode(105...107)(
+                 nil,
+                 [],
+                 nil,
+                 (105...106),
+                 (106...107)
+               )]
+            ),
+            nil,
+            nil
+          ),
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+          (102...104),
+          (116...120)
+        ),
+        InNode(128...152)(
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+            [LocalVariableWriteNode(132...133)(:x, 0, nil, (132...133), nil),
+             LocalVariableWriteNode(135...136)(:y, 0, nil, (135...136), nil)],
+            SplatNode(138...139)((138...139), nil),
+            [],
+            (131...132),
+            (139...140)
+          ),
+          StatementsNode(148...152)([TrueNode(148...152)()]),
+          (128...130),
+          (141...145)
+        ),
+        InNode(153...181)(
+          HashPatternNode(156...169)(
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+            [AssocNode(157...161)(
+               SymbolNode(157...159)(nil, (157...158), (158...159), "a"),
+               IntegerNode(160...161)(),
+               nil
+             ),
+             AssocNode(163...168)(
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+               IntegerNode(167...168)(),
+               nil
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+            nil,
+            (156...157),
+            (168...169)
+          ),
+          StatementsNode(177...181)([TrueNode(177...181)()]),
+          (153...155),
+          (170...174)
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+          (182...184),
+          (188...192)
+        ),
+        InNode(200...222)(
+          HashPatternNode(203...210)(
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+            [AssocNode(204...209)(
+               NoKeywordsParameterNode(204...209)((204...206), (206...209)),
+               nil,
+               nil
+             )],
+            nil,
+            (203...204),
+            (209...210)
+          ),
+          StatementsNode(218...222)([TrueNode(218...222)()]),
+          (200...202),
+          (211...215)
+        ),
+        InNode(223...246)(
+          HashPatternNode(226...234)(
+            nil,
+            [AssocNode(227...233)(
+               SymbolNode(227...231)(
+                 (227...228),
+                 (228...229),
+                 (229...231),
+                 "a"
+               ),
+               IntegerNode(232...233)(),
+               nil
+             )],
+            nil,
+            (226...227),
+            (233...234)
+          ),
+          StatementsNode(242...246)([TrueNode(242...246)()]),
+          (223...225),
+          (235...239)
+        ),
+        InNode(247...267)(
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+            IntegerNode(254...255)(),
+            (252...253)
+          ),
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+          (247...249),
+          (256...260)
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+        InNode(268...289)(
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+          (268...270),
+          (278...282)
+        ),
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+          (290...292),
+          (296...300)
+        ),
+        InNode(308...312)(IntegerNode(311...312)(), nil, (308...310), nil),
+        InNode(313...329)(
+          IntegerNode(316...317)(),
+          StatementsNode(325...329)([TrueNode(325...329)()]),
+          (313...315),
+          (318...322)
+        )],
+       ElseNode(330...345)(
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+         StatementsNode(337...341)([TrueNode(337...341)()]),
+         (342...345)
+       ),
+       (0...4),
+       (342...345)
+     ),
+     CaseNode(346...376)(
+       CallNode(351...354)(
+         nil,
+         nil,
+         (351...354),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(355...372)(
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+            [IntegerNode(360...361)(), IntegerNode(363...364)()],
+            SplatNode(366...368)(
+              (366...367),
+              LocalVariableWriteNode(367...368)(:a, 0, nil, (367...368), nil)
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+            [IntegerNode(370...371)()],
+            (359...360),
+            (371...372)
+          ),
+          nil,
+          (355...357),
+          nil
+        )],
+       nil,
+       (346...350),
+       (373...376)
+     ),
+     CaseNode(377...399)(
+       CallNode(382...385)(
+         nil,
+         nil,
+         (382...385),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       [InNode(386...390)(
+          ConstantReadNode(389...390)(),
+          nil,
+          (386...388),
+          nil
+        )],
+       ElseNode(391...399)((391...395), nil, (396...399)),
+       (377...381),
+       (396...399)
+     ),
+     MatchPredicateNode(400...408)(
+       IntegerNode(400...401)(),
+       ArrayPatternNode(405...408)(
+         nil,
+         [LocalVariableWriteNode(406...407)(:a, 0, nil, (406...407), nil)],
+         nil,
+         [],
+         (405...406),
+         (407...408)
+       ),
+       (402...404)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/pragma.txt b/test/yarp/snapshots/unparser/corpus/literal/pragma.txt
new file mode 100644
index 0000000000..a50b8d7942
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/pragma.txt
@@ -0,0 +1,9 @@
+ProgramNode(0...38)(
+  [],
+  StatementsNode(0...38)(
+    [SourceEncodingNode(0...12)(),
+     SourceFileNode(13...21)("/fixtures/unparser/corpus/literal/pragma.txt"),
+     SourceLineNode(22...30)(),
+     CallNode(31...38)(nil, nil, (31...38), nil, nil, nil, nil, 0, "__dir__")]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/range.txt b/test/yarp/snapshots/unparser/corpus/literal/range.txt
new file mode 100644
index 0000000000..ea2b362a32
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/range.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [ParenthesesNode(0...5)(
+       StatementsNode(1...4)(
+         [RangeNode(1...4)(IntegerNode(1...2)(), nil, (2...4), 0)]
+       ),
+       (0...1),
+       (4...5)
+     ),
+     RangeNode(6...10)(
+       IntegerNode(6...7)(),
+       IntegerNode(9...10)(),
+       (7...9),
+       0
+     ),
+     ParenthesesNode(11...17)(
+       StatementsNode(12...16)(
+         [RangeNode(12...16)(IntegerNode(12...13)(), nil, (13...16), 1)]
+       ),
+       (11...12),
+       (16...17)
+     ),
+     RangeNode(18...23)(
+       IntegerNode(18...19)(),
+       IntegerNode(22...23)(),
+       (19...22),
+       1
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/rescue.txt b/test/yarp/snapshots/unparser/corpus/literal/rescue.txt
new file mode 100644
index 0000000000..f0018fbfad
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/rescue.txt
@@ -0,0 +1,72 @@
+ProgramNode(0...64)(
+  [:x],
+  StatementsNode(0...64)(
+    [RescueModifierNode(0...14)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (4...10),
+       CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "bar")
+     ),
+     RescueModifierNode(15...36)(
+       CallNode(15...18)(nil, nil, (15...18), nil, nil, nil, nil, 0, "foo"),
+       (19...25),
+       ReturnNode(26...36)(
+         (26...32),
+         ArgumentsNode(33...36)(
+           [CallNode(33...36)(
+              nil,
+              nil,
+              (33...36),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         )
+       )
+     ),
+     LocalVariableWriteNode(37...64)(
+       :x,
+       0,
+       ParenthesesNode(41...64)(
+         StatementsNode(42...63)(
+           [RescueModifierNode(42...63)(
+              CallNode(42...45)(
+                nil,
+                nil,
+                (42...45),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "foo"
+              ),
+              (46...52),
+              ReturnNode(53...63)(
+                (53...59),
+                ArgumentsNode(60...63)(
+                  [CallNode(60...63)(
+                     nil,
+                     nil,
+                     (60...63),
+                     nil,
+                     nil,
+                     nil,
+                     nil,
+                     0,
+                     "bar"
+                   )]
+                )
+              )
+            )]
+         ),
+         (41...42),
+         (63...64)
+       ),
+       (37...38),
+       (39...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/send.txt b/test/yarp/snapshots/unparser/corpus/literal/send.txt
new file mode 100644
index 0000000000..a91a323914
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/send.txt
@@ -0,0 +1,2029 @@
+ProgramNode(0...991)(
+  [],
+  StatementsNode(0...991)(
+    [ModuleNode(0...35)(
+       [:foo, :a, :_],
+       (0...6),
+       ConstantReadNode(7...8)(),
+       StatementsNode(11...31)(
+         [LocalVariableOperatorOrWriteNode(11...31)(
+            (11...14),
+            (15...18),
+            ParenthesesNode(19...31)(
+              StatementsNode(21...30)(
+                [MultiWriteNode(21...30)(
+                   [LocalVariableWriteNode(21...22)(
+                      :a,
+                      0,
+                      nil,
+                      (21...22),
+                      nil
+                    ),
+                    LocalVariableWriteNode(24...25)(
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+                      0,
+                      nil,
+                      (24...25),
+                      nil
+                    )],
+                   (27...28),
+                   CallNode(29...30)(
+                     nil,
+                     nil,
+                     (29...30),
+                     nil,
+                     nil,
+                     nil,
+                     nil,
+                     0,
+                     "b"
+                   ),
+                   (20...21),
+                   (25...26)
+                 )]
+              ),
+              (19...20),
+              (30...31)
+            ),
+            :foo
+          )]
+       ),
+       (32...35)
+     ),
+     ModuleNode(37...73)(
+       [:local],
+       (37...43),
+       ConstantReadNode(44...45)(),
+       StatementsNode(48...69)(
+         [LocalVariableWriteNode(48...57)(
+            :local,
+            0,
+            IntegerNode(56...57)(),
+            (48...53),
+            (54...55)
+          ),
+          CallNode(60...69)(
+            LocalVariableReadNode(60...65)(:local, 0),
+            (65...66),
+            (66...69),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       (70...73)
+     ),
+     CallNode(74...89)(
+       ClassNode(74...85)(
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+         (74...79),
+         ConstantReadNode(80...81)(),
+         nil,
+         nil,
+         nil,
+         (82...85)
+       ),
+       (85...86),
+       (86...89),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "bar"
+     ),
+     CallNode(90...106)(
+       ModuleNode(90...102)(
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+         (90...96),
+         ConstantReadNode(97...98)(),
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+       (102...103),
+       (103...106),
+       nil,
+       nil,
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+       nil,
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+     CallNode(107...127)(
+       BeginNode(107...123)(
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+         nil,
+         RescueNode(113...119)((113...119), [], nil, nil, nil, nil),
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+         nil,
+         (120...123)
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+       (123...124),
+       (124...127),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "bar"
+     ),
+     CallNode(128...169)(
+       CaseNode(128...165)(
+         ParenthesesNode(133...152)(
+           StatementsNode(134...151)(
+             [DefNode(134...145)(
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+                nil,
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+                nil,
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+                nil,
+                nil,
+                (142...145)
+              ),
+              SymbolNode(147...151)((147...148), (148...151), nil, "bar")]
+           ),
+           (133...134),
+           (151...152)
+         ),
+         [WhenNode(153...161)(
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+            [CallNode(158...161)(
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+            nil
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+         nil,
+         (128...132),
+         (162...165)
+       ),
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+       (166...169),
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+       nil,
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+     CallNode(170...195)(
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+            nil
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+         nil,
+         (170...174),
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+       "baz"
+     ),
+     CallNode(196...217)(
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+         (202...204),
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+     CallNode(239...254)(
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+              nil,
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+       nil,
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+              ArgumentsNode(358...363)(
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+     CallNode(432...450)(
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+                "a"
+              ),
+              nil,
+              (914...915),
+              nil,
+              ArgumentsNode(916...917)(
+                [CallNode(916...917)(
+                   nil,
+                   nil,
+                   (916...917),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "b"
+                 )]
+              ),
+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (911...912),
+         (917...918)
+       ),
+       nil,
+       (919...920),
+       nil,
+       ArgumentsNode(921...928)(
+         [ParenthesesNode(921...928)(
+            StatementsNode(922...927)(
+              [CallNode(922...927)(
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+                   nil,
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+                 nil,
+                 (924...925),
+                 nil,
+                 ArgumentsNode(926...927)(
+                   [CallNode(926...927)(
+                      nil,
+                      nil,
+                      (926...927),
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+                      nil,
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+                 nil,
+                 nil,
+                 0,
+                 "-"
+               )]
+            ),
+            (921...922),
+            (927...928)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(929...948)(
+       ParenthesesNode(929...936)(
+         StatementsNode(930...935)(
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+                nil,
+                nil,
+                nil,
+                0,
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+              nil,
+              (932...933),
+              nil,
+              ArgumentsNode(934...935)(
+                [CallNode(934...935)(
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+              nil,
+              nil,
+              0,
+              "+"
+            )]
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+         (935...936)
+       ),
+       nil,
+       (937...938),
+       nil,
+       ArgumentsNode(939...948)(
+         [CallNode(939...948)(
+            CallNode(939...940)(
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+              nil,
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+              nil,
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+              nil,
+              0,
+              "c"
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+            (940...941),
+            (941...942),
+            (942...943),
+            ArgumentsNode(943...947)(
+              [CallNode(943...944)(
+                 nil,
+                 nil,
+                 (943...944),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "e"
+               ),
+               CallNode(946...947)(
+                 nil,
+                 nil,
+                 (946...947),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "f"
+               )]
+            ),
+            (947...948),
+            nil,
+            0,
+            "-"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(949...966)(
+       ParenthesesNode(949...956)(
+         StatementsNode(950...955)(
+           [CallNode(950...955)(
+              CallNode(950...951)(
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+                nil,
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+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "a"
+              ),
+              nil,
+              (952...953),
+              nil,
+              ArgumentsNode(954...955)(
+                [CallNode(954...955)(
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+                   nil,
+                   (954...955),
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+                   "b"
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+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (949...950),
+         (955...956)
+       ),
+       nil,
+       (957...958),
+       nil,
+       ArgumentsNode(959...966)(
+         [CallNode(959...966)(
+            CallNode(959...960)(
+              nil,
+              nil,
+              (959...960),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "c"
+            ),
+            (960...961),
+            (961...962),
+            (962...963),
+            ArgumentsNode(963...965)(
+              [SplatNode(963...965)(
+                 (963...964),
+                 CallNode(964...965)(
+                   nil,
+                   nil,
+                   (964...965),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "f"
+                 )
+               )]
+            ),
+            (965...966),
+            nil,
+            0,
+            "-"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(967...975)(
+       nil,
+       nil,
+       (967...968),
+       (968...969),
+       ArgumentsNode(969...974)(
+         [KeywordHashNode(969...974)(
+            [AssocSplatNode(969...974)(
+               CallNode(971...974)(
+                 nil,
+                 nil,
+                 (971...974),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               ),
+               (969...971)
+             )]
+          )]
+       ),
+       (974...975),
+       nil,
+       0,
+       "x"
+     ),
+     CallNode(976...982)(
+       CallNode(976...979)(
+         nil,
+         nil,
+         (976...979),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (979...981),
+       (981...982),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "!"
+     ),
+     CallNode(983...991)(
+       CallNode(983...986)(
+         nil,
+         nil,
+         (983...986),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       (986...987),
+       (987...988),
+       (988...989),
+       ArgumentsNode(989...990)(
+         [CallNode(989...990)(
+            nil,
+            nil,
+            (989...990),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       (990...991),
+       nil,
+       0,
+       "~"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/since/27.txt b/test/yarp/snapshots/unparser/corpus/literal/since/27.txt
new file mode 100644
index 0000000000..0f2e6cc90c
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/since/27.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [LambdaNode(0...16)(
+       [],
+       (0...2),
+       nil,
+       StatementsNode(7...14)(
+         [CallNode(7...14)(
+            CallNode(7...9)(nil, nil, (7...9), nil, nil, nil, nil, 0, "_1"),
+            nil,
+            (10...11),
+            nil,
+            ArgumentsNode(12...14)(
+              [CallNode(12...14)(
+                 nil,
+                 nil,
+                 (12...14),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "_2"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       )
+     ),
+     ParenthesesNode(17...22)(
+       StatementsNode(18...21)(
+         [RangeNode(18...21)(nil, IntegerNode(20...21)(), (18...20), 0)]
+       ),
+       (17...18),
+       (21...22)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/since/30.txt b/test/yarp/snapshots/unparser/corpus/literal/since/30.txt
new file mode 100644
index 0000000000..15d5136d83
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/since/30.txt
@@ -0,0 +1,56 @@
+ProgramNode(0...51)(
+  [:a, :foo],
+  StatementsNode(0...51)(
+    [MatchRequiredNode(0...8)(
+       IntegerNode(0...1)(),
+       ArrayPatternNode(5...8)(
+         nil,
+         [LocalVariableWriteNode(6...7)(:a, 0, nil, (6...7), nil)],
+         nil,
+         [],
+         (5...6),
+         (7...8)
+       ),
+       (2...4)
+     ),
+     MatchRequiredNode(9...17)(
+       IntegerNode(9...10)(),
+       ArrayPatternNode(14...17)(
+         nil,
+         [],
+         SplatNode(15...16)((15...16), nil),
+         [],
+         (14...15),
+         (16...17)
+       ),
+       (11...13)
+     ),
+     MatchPredicateNode(18...33)(
+       IntegerNode(18...19)(),
+       FindPatternNode(23...33)(
+         nil,
+         SplatNode(24...25)((24...25), nil),
+         [IntegerNode(27...29)()],
+         SplatNode(31...32)((31...32), nil),
+         (23...24),
+         (32...33)
+       ),
+       (20...22)
+     ),
+     MatchPredicateNode(34...51)(
+       IntegerNode(34...35)(),
+       FindPatternNode(39...51)(
+         nil,
+         SplatNode(40...41)((40...41), nil),
+         [LocalVariableWriteNode(43...44)(:a, 0, nil, (43...44), nil)],
+         SplatNode(46...50)(
+           (46...47),
+           LocalVariableWriteNode(47...50)(:foo, 0, nil, (47...50), nil)
+         ),
+         (39...40),
+         (50...51)
+       ),
+       (36...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/since/31.txt b/test/yarp/snapshots/unparser/corpus/literal/since/31.txt
new file mode 100644
index 0000000000..b646850e2b
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/since/31.txt
@@ -0,0 +1,75 @@
+ProgramNode(0...51)(
+  [],
+  StatementsNode(0...51)(
+    [DefNode(0...23)(
+       (4...7),
+       nil,
+       ParametersNode(8...9)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         BlockParameterNode(8...9)(nil, (8...9))
+       ),
+       StatementsNode(13...19)(
+         [CallNode(13...19)(
+            nil,
+            nil,
+            (13...16),
+            (16...17),
+            ArgumentsNode(17...18)(
+              [BlockArgumentNode(17...18)(nil, (17...18))]
+            ),
+            (18...19),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:&],
+       (0...3),
+       nil,
+       (7...8),
+       (9...10),
+       nil,
+       (20...23)
+     ),
+     DefNode(25...51)(
+       (29...32),
+       nil,
+       ParametersNode(33...37)(
+         [RequiredParameterNode(33...34)(:a)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         BlockParameterNode(36...37)(nil, (36...37))
+       ),
+       StatementsNode(41...47)(
+         [CallNode(41...47)(
+            nil,
+            nil,
+            (41...44),
+            (44...45),
+            ArgumentsNode(45...46)(
+              [BlockArgumentNode(45...46)(nil, (45...46))]
+            ),
+            (46...47),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:a, :&],
+       (25...28),
+       nil,
+       (32...33),
+       (37...38),
+       nil,
+       (48...51)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/since/32.txt b/test/yarp/snapshots/unparser/corpus/literal/since/32.txt
new file mode 100644
index 0000000000..31397bf468
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/since/32.txt
@@ -0,0 +1,79 @@
+ProgramNode(0...90)(
+  [],
+  StatementsNode(0...90)(
+    [DefNode(0...45)(
+       (4...7),
+       nil,
+       ParametersNode(8...20)(
+         [RequiredParameterNode(8...16)(:argument)],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(18...20)((18...20), nil),
+         nil
+       ),
+       StatementsNode(24...41)(
+         [CallNode(24...41)(
+            nil,
+            nil,
+            (24...27),
+            (27...28),
+            ArgumentsNode(28...40)(
+              [LocalVariableReadNode(28...36)(:argument, 0),
+               KeywordHashNode(38...40)(
+                 [AssocSplatNode(38...40)(nil, (38...40))]
+               )]
+            ),
+            (40...41),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:argument, :**],
+       (0...3),
+       nil,
+       (7...8),
+       (20...21),
+       nil,
+       (42...45)
+     ),
+     DefNode(47...90)(
+       (51...54),
+       nil,
+       ParametersNode(55...66)(
+         [RequiredParameterNode(55...63)(:argument)],
+         [],
+         [],
+         RestParameterNode(65...66)((65...66), nil),
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(70...86)(
+         [CallNode(70...86)(
+            nil,
+            nil,
+            (70...73),
+            (73...74),
+            ArgumentsNode(74...85)(
+              [LocalVariableReadNode(74...82)(:argument, 0),
+               SplatNode(84...85)((84...85), nil)]
+            ),
+            (85...86),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:argument, :*],
+       (47...50),
+       nil,
+       (54...55),
+       (66...67),
+       nil,
+       (87...90)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/singletons.txt b/test/yarp/snapshots/unparser/corpus/literal/singletons.txt
new file mode 100644
index 0000000000..53cc92e636
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/singletons.txt
@@ -0,0 +1,9 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [FalseNode(0...5)(),
+     NilNode(6...9)(),
+     SelfNode(10...14)(),
+     TrueNode(15...19)()]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/super.txt b/test/yarp/snapshots/unparser/corpus/literal/super.txt
new file mode 100644
index 0000000000..6a06faa9cf
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/super.txt
@@ -0,0 +1,239 @@
+ProgramNode(0...159)(
+  [],
+  StatementsNode(0...159)(
+    [ForwardingSuperNode(0...5)(nil),
+     SuperNode(6...13)((6...11), (11...12), nil, (12...13), nil),
+     SuperNode(14...22)(
+       (14...19),
+       (19...20),
+       ArgumentsNode(20...21)(
+         [CallNode(20...21)(nil, nil, (20...21), nil, nil, nil, nil, 0, "a")]
+       ),
+       (21...22),
+       nil
+     ),
+     SuperNode(23...34)(
+       (23...28),
+       (28...29),
+       ArgumentsNode(29...33)(
+         [CallNode(29...30)(nil, nil, (29...30), nil, nil, nil, nil, 0, "a"),
+          CallNode(32...33)(nil, nil, (32...33), nil, nil, nil, nil, 0, "b")]
+       ),
+       (33...34),
+       nil
+     ),
+     SuperNode(35...48)(
+       (35...40),
+       (40...41),
+       ArgumentsNode(41...47)(
+         [BlockArgumentNode(41...47)(
+            CallNode(42...47)(
+              nil,
+              nil,
+              (42...47),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "block"
+            ),
+            (41...42)
+          )]
+       ),
+       (47...48),
+       nil
+     ),
+     SuperNode(49...65)(
+       (49...54),
+       (54...55),
+       ArgumentsNode(55...64)(
+         [CallNode(55...56)(nil, nil, (55...56), nil, nil, nil, nil, 0, "a"),
+          BlockArgumentNode(58...64)(
+            CallNode(59...64)(
+              nil,
+              nil,
+              (59...64),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "block"
+            ),
+            (58...59)
+          )]
+       ),
+       (64...65),
+       nil
+     ),
+     SuperNode(66...84)(
+       (66...71),
+       (71...72),
+       ArgumentsNode(72...83)(
+         [CallNode(72...83)(
+            nil,
+            nil,
+            (72...73),
+            nil,
+            nil,
+            nil,
+            BlockNode(74...83)(
+              [],
+              nil,
+              StatementsNode(78...81)(
+                [CallNode(78...81)(
+                   nil,
+                   nil,
+                   (78...81),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "foo"
+                 )]
+              ),
+              (74...75),
+              (82...83)
+            ),
+            0,
+            "a"
+          )]
+       ),
+       (83...84),
+       nil
+     ),
+     ForwardingSuperNode(85...100)(
+       BlockNode(91...100)(
+         [],
+         nil,
+         StatementsNode(95...98)(
+           [CallNode(95...98)(
+              nil,
+              nil,
+              (95...98),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         (91...92),
+         (99...100)
+       )
+     ),
+     SuperNode(101...119)(
+       (101...106),
+       (106...107),
+       ArgumentsNode(107...108)(
+         [CallNode(107...108)(
+            nil,
+            nil,
+            (107...108),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       (108...109),
+       BlockNode(110...119)(
+         [],
+         nil,
+         StatementsNode(114...117)(
+           [CallNode(114...117)(
+              nil,
+              nil,
+              (114...117),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         (110...111),
+         (118...119)
+       )
+     ),
+     SuperNode(120...137)(
+       (120...125),
+       (125...126),
+       nil,
+       (126...127),
+       BlockNode(128...137)(
+         [],
+         nil,
+         StatementsNode(132...135)(
+           [CallNode(132...135)(
+              nil,
+              nil,
+              (132...135),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         (128...129),
+         (136...137)
+       )
+     ),
+     SuperNode(138...159)(
+       (138...143),
+       (143...144),
+       ArgumentsNode(144...148)(
+         [CallNode(144...145)(
+            nil,
+            nil,
+            (144...145),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          ),
+          CallNode(147...148)(
+            nil,
+            nil,
+            (147...148),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       (148...149),
+       BlockNode(150...159)(
+         [],
+         nil,
+         StatementsNode(154...157)(
+           [CallNode(154...157)(
+              nil,
+              nil,
+              (154...157),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         (150...151),
+         (158...159)
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/unary.txt b/test/yarp/snapshots/unparser/corpus/literal/unary.txt
new file mode 100644
index 0000000000..ac41353770
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/unary.txt
@@ -0,0 +1,217 @@
+ProgramNode(0...54)(
+  [],
+  StatementsNode(0...54)(
+    [CallNode(0...2)(
+       IntegerNode(1...2)(),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(3...8)(
+       ParenthesesNode(4...8)(
+         StatementsNode(5...7)(
+           [CallNode(5...7)(
+              IntegerNode(6...7)(),
+              nil,
+              (5...6),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "!"
+            )]
+         ),
+         (4...5),
+         (7...8)
+       ),
+       nil,
+       (3...4),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(9...25)(
+       ParenthesesNode(10...25)(
+         StatementsNode(11...24)(
+           [CallNode(11...24)(
+              ParenthesesNode(12...24)(
+                StatementsNode(13...23)(
+                  [OrNode(13...23)(
+                     CallNode(13...16)(
+                       nil,
+                       nil,
+                       (13...16),
+                       nil,
+                       nil,
+                       nil,
+                       nil,
+                       0,
+                       "foo"
+                     ),
+                     CallNode(20...23)(
+                       nil,
+                       nil,
+                       (20...23),
+                       nil,
+                       nil,
+                       nil,
+                       nil,
+                       0,
+                       "bar"
+                     ),
+                     (17...19)
+                   )]
+                ),
+                (12...13),
+                (23...24)
+              ),
+              nil,
+              (11...12),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "!"
+            )]
+         ),
+         (10...11),
+         (24...25)
+       ),
+       nil,
+       (9...10),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(26...35)(
+       CallNode(27...35)(
+         ParenthesesNode(27...31)(
+           StatementsNode(28...30)(
+             [CallNode(28...30)(
+                IntegerNode(29...30)(),
+                nil,
+                (28...29),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "!"
+              )]
+           ),
+           (27...28),
+           (30...31)
+         ),
+         (31...32),
+         (32...35),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "baz"
+       ),
+       nil,
+       (26...27),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(36...38)(
+       CallNode(37...38)(nil, nil, (37...38), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (36...37),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "~"
+     ),
+     CallNode(39...41)(
+       CallNode(40...41)(nil, nil, (40...41), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (39...40),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     CallNode(42...44)(
+       CallNode(43...44)(nil, nil, (43...44), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (42...43),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "+@"
+     ),
+     CallNode(45...54)(
+       CallNode(46...54)(
+         ParenthesesNode(46...50)(
+           StatementsNode(47...49)(
+             [CallNode(47...49)(
+                CallNode(48...49)(
+                  nil,
+                  nil,
+                  (48...49),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "a"
+                ),
+                nil,
+                (47...48),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "-@"
+              )]
+           ),
+           (46...47),
+           (49...50)
+         ),
+         (50...51),
+         (51...54),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (45...46),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/undef.txt b/test/yarp/snapshots/unparser/corpus/literal/undef.txt
new file mode 100644
index 0000000000..30e513d19e
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/undef.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [UndefNode(0...10)(
+       [SymbolNode(6...10)((6...7), (7...10), nil, "foo")],
+       (0...5)
+     ),
+     UndefNode(11...27)(
+       [SymbolNode(17...21)((17...18), (18...21), nil, "foo"),
+        SymbolNode(23...27)((23...24), (24...27), nil, "bar")],
+       (11...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/variables.txt b/test/yarp/snapshots/unparser/corpus/literal/variables.txt
new file mode 100644
index 0000000000..1cf71a2360
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/variables.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...66)(
+  [],
+  StatementsNode(0...66)(
+    [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+     InstanceVariableReadNode(2...4)(),
+     ClassVariableReadNode(5...8)(),
+     GlobalVariableReadNode(9...11)(),
+     NumberedReferenceReadNode(12...14)(),
+     BackReferenceReadNode(15...17)(),
+     ConstantReadNode(18...23)(),
+     ConstantPathNode(24...37)(
+       ConstantReadNode(24...30)(),
+       ConstantReadNode(32...37)(),
+       (30...32)
+     ),
+     ConstantPathNode(38...48)(nil, ConstantReadNode(40...48)(), (38...40)),
+     ConstantPathNode(49...66)(
+       ConstantPathNode(49...59)(nil, ConstantReadNode(51...59)(), (49...51)),
+       ConstantReadNode(61...66)(),
+       (59...61)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/while.txt b/test/yarp/snapshots/unparser/corpus/literal/while.txt
new file mode 100644
index 0000000000..a08e9696dd
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/while.txt
@@ -0,0 +1,599 @@
+ProgramNode(0...620)(
+  [:x],
+  StatementsNode(0...620)(
+    [ModuleNode(0...68)(
+       [],
+       (0...6),
+       ConstantReadNode(7...8)(),
+       StatementsNode(11...64)(
+         [CallNode(11...64)(
+            nil,
+            nil,
+            (11...14),
+            nil,
+            nil,
+            nil,
+            BlockNode(15...64)(
+              [:bar, :foo],
+              BlockParametersNode(17...22)(
+                ParametersNode(18...21)(
+                  [RequiredParameterNode(18...21)(:bar)],
+                  [],
+                  [],
+                  nil,
+                  [],
+                  nil,
+                  nil
+                ),
+                [],
+                (17...18),
+                (21...22)
+              ),
+              StatementsNode(27...60)(
+                [WhileNode(27...60)(
+                   (27...32),
+                   CallNode(33...36)(
+                     nil,
+                     nil,
+                     (33...36),
+                     nil,
+                     nil,
+                     nil,
+                     nil,
+                     0,
+                     "foo"
+                   ),
+                   StatementsNode(43...52)(
+                     [LocalVariableWriteNode(43...52)(
+                        :foo,
+                        0,
+                        LocalVariableReadNode(49...52)(:bar, 0),
+                        (43...46),
+                        (47...48)
+                      )]
+                   )
+                 )]
+              ),
+              (15...16),
+              (63...64)
+            ),
+            0,
+            "foo"
+          )]
+       ),
+       (65...68)
+     ),
+     DefNode(70...110)(
+       (74...77),
+       nil,
+       nil,
+       StatementsNode(80...106)(
+         [WhileNode(80...106)(
+            (90...95),
+            CallNode(96...106)(
+              LocalVariableReadNode(96...99)(:foo, 0),
+              nil,
+              (100...102),
+              nil,
+              ArgumentsNode(103...106)(
+                [CallNode(103...106)(
+                   nil,
+                   nil,
+                   (103...106),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "baz"
+                 )]
+              ),
+              nil,
+              nil,
+              0,
+              "!="
+            ),
+            StatementsNode(80...89)(
+              [LocalVariableWriteNode(80...89)(
+                 :foo,
+                 0,
+                 CallNode(86...89)(
+                   nil,
+                   nil,
+                   (86...89),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (80...83),
+                 (84...85)
+               )]
+            )
+          )]
+       ),
+       [:foo],
+       (70...73),
+       nil,
+       nil,
+       nil,
+       nil,
+       (107...110)
+     ),
+     ModuleNode(112...146)(
+       [:foo],
+       (112...118),
+       ConstantReadNode(119...120)(),
+       StatementsNode(123...142)(
+         [WhileNode(123...142)(
+            (133...138),
+            LocalVariableReadNode(139...142)(:foo, 0),
+            StatementsNode(123...132)(
+              [LocalVariableWriteNode(123...132)(
+                 :foo,
+                 0,
+                 CallNode(129...132)(
+                   nil,
+                   nil,
+                   (129...132),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (123...126),
+                 (127...128)
+               )]
+            )
+          )]
+       ),
+       (143...146)
+     ),
+     ModuleNode(148...182)(
+       [:foo],
+       (148...154),
+       ConstantReadNode(155...156)(),
+       StatementsNode(159...178)(
+         [UntilNode(159...178)(
+            (169...174),
+            LocalVariableReadNode(175...178)(:foo, 0),
+            StatementsNode(159...168)(
+              [LocalVariableWriteNode(159...168)(
+                 :foo,
+                 0,
+                 CallNode(165...168)(
+                   nil,
+                   nil,
+                   (165...168),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (159...162),
+                 (163...164)
+               )]
+            )
+          )]
+       ),
+       (179...182)
+     ),
+     ModuleNode(184...228)(
+       [:foo],
+       (184...190),
+       ConstantReadNode(191...192)(),
+       StatementsNode(195...224)(
+         [WhileNode(195...224)(
+            (195...200),
+            CallNode(201...204)(
+              nil,
+              nil,
+              (201...204),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            ),
+            StatementsNode(209...218)(
+              [LocalVariableWriteNode(209...218)(
+                 :foo,
+                 0,
+                 CallNode(215...218)(
+                   nil,
+                   nil,
+                   (215...218),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (209...212),
+                 (213...214)
+               )]
+            )
+          )]
+       ),
+       (225...228)
+     ),
+     ModuleNode(230...299)(
+       [],
+       (230...236),
+       ConstantReadNode(237...238)(),
+       StatementsNode(241...295)(
+         [CallNode(241...295)(
+            nil,
+            nil,
+            (241...245),
+            nil,
+            nil,
+            nil,
+            BlockNode(246...295)(
+              [:baz, :foo],
+              BlockParametersNode(248...253)(
+                ParametersNode(249...252)(
+                  [RequiredParameterNode(249...252)(:baz)],
+                  [],
+                  [],
+                  nil,
+                  [],
+                  nil,
+                  nil
+                ),
+                [],
+                (248...249),
+                (252...253)
+              ),
+              StatementsNode(258...291)(
+                [WhileNode(258...291)(
+                   (258...263),
+                   CallNode(264...267)(
+                     nil,
+                     nil,
+                     (264...267),
+                     nil,
+                     nil,
+                     nil,
+                     nil,
+                     0,
+                     "foo"
+                   ),
+                   StatementsNode(274...283)(
+                     [LocalVariableWriteNode(274...283)(
+                        :foo,
+                        0,
+                        CallNode(280...283)(
+                          nil,
+                          nil,
+                          (280...283),
+                          nil,
+                          nil,
+                          nil,
+                          nil,
+                          0,
+                          "bar"
+                        ),
+                        (274...277),
+                        (278...279)
+                      )]
+                   )
+                 )]
+              ),
+              (246...247),
+              (294...295)
+            ),
+            0,
+            "each"
+          )]
+       ),
+       (296...299)
+     ),
+     ModuleNode(301...370)(
+       [],
+       (301...307),
+       ConstantReadNode(308...309)(),
+       StatementsNode(312...366)(
+         [CallNode(312...366)(
+            nil,
+            nil,
+            (312...316),
+            nil,
+            nil,
+            nil,
+            BlockNode(317...366)(
+              [:foo],
+              BlockParametersNode(319...324)(
+                ParametersNode(320...323)(
+                  [RequiredParameterNode(320...323)(:foo)],
+                  [],
+                  [],
+                  nil,
+                  [],
+                  nil,
+                  nil
+                ),
+                [],
+                (319...320),
+                (323...324)
+              ),
+              StatementsNode(329...362)(
+                [WhileNode(329...362)(
+                   (329...334),
+                   LocalVariableReadNode(335...338)(:foo, 0),
+                   StatementsNode(345...354)(
+                     [LocalVariableWriteNode(345...354)(
+                        :foo,
+                        0,
+                        CallNode(351...354)(
+                          nil,
+                          nil,
+                          (351...354),
+                          nil,
+                          nil,
+                          nil,
+                          nil,
+                          0,
+                          "bar"
+                        ),
+                        (345...348),
+                        (349...350)
+                      )]
+                   )
+                 )]
+              ),
+              (317...318),
+              (365...366)
+            ),
+            0,
+            "each"
+          )]
+       ),
+       (367...370)
+     ),
+     LocalVariableWriteNode(371...402)(
+       :x,
+       0,
+       ParenthesesNode(375...402)(
+         StatementsNode(376...401)(
+           [WhileNode(376...401)(
+              (392...397),
+              CallNode(398...401)(
+                nil,
+                nil,
+                (398...401),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "baz"
+              ),
+              StatementsNode(376...391)(
+                [BeginNode(376...391)(
+                   (376...381),
+                   StatementsNode(384...387)(
+                     [CallNode(384...387)(
+                        nil,
+                        nil,
+                        (384...387),
+                        nil,
+                        nil,
+                        nil,
+                        nil,
+                        0,
+                        "foo"
+                      )]
+                   ),
+                   nil,
+                   nil,
+                   nil,
+                   (388...391)
+                 )]
+              )
+            )]
+         ),
+         (375...376),
+         (401...402)
+       ),
+       (371...372),
+       (373...374)
+     ),
+     WhileNode(403...428)(
+       (419...424),
+       CallNode(425...428)(
+         nil,
+         nil,
+         (425...428),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "baz"
+       ),
+       StatementsNode(403...418)(
+         [BeginNode(403...418)(
+            (403...408),
+            StatementsNode(411...414)(
+              [CallNode(411...414)(
+                 nil,
+                 nil,
+                 (411...414),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (415...418)
+          )]
+       )
+     ),
+     UntilNode(429...460)(
+       (451...456),
+       CallNode(457...460)(
+         nil,
+         nil,
+         (457...460),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "baz"
+       ),
+       StatementsNode(429...450)(
+         [BeginNode(429...450)(
+            (429...434),
+            StatementsNode(437...446)(
+              [CallNode(437...440)(
+                 nil,
+                 nil,
+                 (437...440),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               ),
+               CallNode(443...446)(
+                 nil,
+                 nil,
+                 (443...446),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (447...450)
+          )]
+       )
+     ),
+     WhileNode(461...492)(
+       (483...488),
+       CallNode(489...492)(
+         nil,
+         nil,
+         (489...492),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "baz"
+       ),
+       StatementsNode(461...482)(
+         [BeginNode(461...482)(
+            (461...466),
+            StatementsNode(469...478)(
+              [CallNode(469...472)(
+                 nil,
+                 nil,
+                 (469...472),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               ),
+               CallNode(475...478)(
+                 nil,
+                 nil,
+                 (475...478),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (479...482)
+          )]
+       )
+     ),
+     WhileNode(493...508)((493...498), FalseNode(499...504)(), nil),
+     WhileNode(509...528)(
+       (509...514),
+       FalseNode(515...520)(),
+       StatementsNode(523...524)([IntegerNode(523...524)()])
+     ),
+     WhileNode(529...556)(
+       (529...534),
+       ParenthesesNode(535...544)(
+         StatementsNode(536...543)(
+           [CallNode(536...543)(
+              nil,
+              nil,
+              (536...539),
+              nil,
+              nil,
+              nil,
+              BlockNode(540...543)([], nil, nil, (540...541), (542...543)),
+              0,
+              "foo"
+            )]
+         ),
+         (535...536),
+         (543...544)
+       ),
+       StatementsNode(547...552)(
+         [SymbolNode(547...552)((547...548), (548...552), nil, "body")]
+       )
+     ),
+     UntilNode(557...572)((557...562), FalseNode(563...568)(), nil),
+     UntilNode(573...592)(
+       (573...578),
+       FalseNode(579...584)(),
+       StatementsNode(587...588)([IntegerNode(587...588)()])
+     ),
+     UntilNode(593...620)(
+       (593...598),
+       ParenthesesNode(599...608)(
+         StatementsNode(600...607)(
+           [CallNode(600...607)(
+              nil,
+              nil,
+              (600...603),
+              nil,
+              nil,
+              nil,
+              BlockNode(604...607)([], nil, nil, (604...605), (606...607)),
+              0,
+              "foo"
+            )]
+         ),
+         (599...600),
+         (607...608)
+       ),
+       StatementsNode(611...616)(
+         [SymbolNode(611...616)((611...612), (612...616), nil, "body")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/literal/yield.txt b/test/yarp/snapshots/unparser/corpus/literal/yield.txt
new file mode 100644
index 0000000000..224659ffb1
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/literal/yield.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [YieldNode(0...5)((0...5), nil, nil, nil),
+     YieldNode(6...14)(
+       (6...11),
+       (11...12),
+       ArgumentsNode(12...13)(
+         [CallNode(12...13)(nil, nil, (12...13), nil, nil, nil, nil, 0, "a")]
+       ),
+       (13...14)
+     ),
+     YieldNode(15...26)(
+       (15...20),
+       (20...21),
+       ArgumentsNode(21...25)(
+         [CallNode(21...22)(nil, nil, (21...22), nil, nil, nil, nil, 0, "a"),
+          CallNode(24...25)(nil, nil, (24...25), nil, nil, nil, nil, 0, "b")]
+       ),
+       (25...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/and.txt b/test/yarp/snapshots/unparser/corpus/semantic/and.txt
new file mode 100644
index 0000000000..470615af51
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/and.txt
@@ -0,0 +1,77 @@
+ProgramNode(0...77)(
+  [],
+  StatementsNode(0...77)(
+    [OrNode(0...14)(
+       RangeNode(0...5)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "b"),
+         (1...4),
+         1
+       ),
+       RangeNode(9...14)(
+         CallNode(9...10)(nil, nil, (9...10), nil, nil, nil, nil, 0, "c"),
+         CallNode(13...14)(nil, nil, (13...14), nil, nil, nil, nil, 0, "d"),
+         (10...13),
+         1
+       ),
+       (6...8)
+     ),
+     AndNode(15...30)(
+       RangeNode(15...20)(
+         CallNode(15...16)(nil, nil, (15...16), nil, nil, nil, nil, 0, "a"),
+         CallNode(19...20)(nil, nil, (19...20), nil, nil, nil, nil, 0, "b"),
+         (16...19),
+         1
+       ),
+       RangeNode(25...30)(
+         CallNode(25...26)(nil, nil, (25...26), nil, nil, nil, nil, 0, "c"),
+         CallNode(29...30)(nil, nil, (29...30), nil, nil, nil, nil, 0, "d"),
+         (26...29),
+         1
+       ),
+       (21...24)
+     ),
+     IfNode(32...53)(
+       (32...34),
+       OrNode(35...49)(
+         RangeNode(35...40)(
+           CallNode(35...36)(nil, nil, (35...36), nil, nil, nil, nil, 0, "a"),
+           CallNode(39...40)(nil, nil, (39...40), nil, nil, nil, nil, 0, "b"),
+           (36...39),
+           1
+         ),
+         RangeNode(44...49)(
+           CallNode(44...45)(nil, nil, (44...45), nil, nil, nil, nil, 0, "c"),
+           CallNode(48...49)(nil, nil, (48...49), nil, nil, nil, nil, 0, "d"),
+           (45...48),
+           1
+         ),
+         (41...43)
+       ),
+       nil,
+       nil,
+       (50...53)
+     ),
+     IfNode(55...77)(
+       (55...57),
+       AndNode(58...73)(
+         RangeNode(58...63)(
+           CallNode(58...59)(nil, nil, (58...59), nil, nil, nil, nil, 0, "a"),
+           CallNode(62...63)(nil, nil, (62...63), nil, nil, nil, nil, 0, "b"),
+           (59...62),
+           1
+         ),
+         RangeNode(68...73)(
+           CallNode(68...69)(nil, nil, (68...69), nil, nil, nil, nil, 0, "c"),
+           CallNode(72...73)(nil, nil, (72...73), nil, nil, nil, nil, 0, "d"),
+           (69...72),
+           1
+         ),
+         (64...67)
+       ),
+       nil,
+       nil,
+       (74...77)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/block.txt b/test/yarp/snapshots/unparser/corpus/semantic/block.txt
new file mode 100644
index 0000000000..c4b2d1ab4c
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/block.txt
@@ -0,0 +1,165 @@
+ProgramNode(0...148)(
+  [],
+  StatementsNode(0...148)(
+    [CallNode(0...10)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...10)([], nil, nil, (4...6), (7...10)),
+       0,
+       "foo"
+     ),
+     CallNode(12...29)(
+       nil,
+       nil,
+       (12...15),
+       nil,
+       nil,
+       nil,
+       BlockNode(16...29)(
+         [],
+         nil,
+         BeginNode(19...29)(
+           nil,
+           nil,
+           RescueNode(19...25)((19...25), [], nil, nil, nil, nil),
+           nil,
+           nil,
+           (26...29)
+         ),
+         (16...18),
+         (26...29)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(31...64)(
+       nil,
+       nil,
+       (31...34),
+       nil,
+       nil,
+       nil,
+       BlockNode(35...64)(
+         [],
+         nil,
+         StatementsNode(40...60)(
+           [RescueModifierNode(40...54)(
+              NilNode(40...43)(),
+              (44...50),
+              NilNode(51...54)()
+            ),
+            NilNode(57...60)()]
+         ),
+         (35...37),
+         (61...64)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(66...80)(
+       nil,
+       nil,
+       (66...69),
+       nil,
+       nil,
+       nil,
+       BlockNode(70...80)(
+         [:a],
+         BlockParametersNode(73...76)(
+           ParametersNode(74...75)(
+             [RequiredParameterNode(74...75)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (73...74),
+           (75...76)
+         ),
+         nil,
+         (70...72),
+         (77...80)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(82...116)(
+       nil,
+       nil,
+       (82...85),
+       (85...86),
+       ArgumentsNode(86...109)(
+         [InterpolatedStringNode(86...109)(
+            (86...92),
+            [StringNode(101...105)(nil, (101...105), nil, "  b\n")],
+            (105...109)
+          )]
+       ),
+       (92...93),
+       BlockNode(94...116)(
+         [:a],
+         BlockParametersNode(97...100)(
+           ParametersNode(98...99)(
+             [RequiredParameterNode(98...99)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (97...98),
+           (99...100)
+         ),
+         StatementsNode(111...112)([LocalVariableReadNode(111...112)(:a, 0)]),
+         (94...96),
+         (113...116)
+       ),
+       0,
+       "foo"
+     ),
+     CallNode(118...148)(
+       nil,
+       nil,
+       (118...121),
+       (121...122),
+       ArgumentsNode(122...141)(
+         [InterpolatedStringNode(122...141)(
+            (122...128),
+            [StringNode(133...137)(nil, (133...137), nil, "  b\n")],
+            (137...141)
+          )]
+       ),
+       (128...129),
+       BlockNode(130...148)(
+         [],
+         nil,
+         StatementsNode(143...144)(
+           [CallNode(143...144)(
+              nil,
+              nil,
+              (143...144),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "a"
+            )]
+         ),
+         (130...132),
+         (145...148)
+       ),
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/def.txt b/test/yarp/snapshots/unparser/corpus/semantic/def.txt
new file mode 100644
index 0000000000..922dbc5a45
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/def.txt
@@ -0,0 +1,77 @@
+ProgramNode(0...55)(
+  [],
+  StatementsNode(0...55)(
+    [DefNode(0...21)(
+       (4...7),
+       nil,
+       nil,
+       StatementsNode(10...17)(
+         [ParenthesesNode(10...17)(
+            StatementsNode(11...16)(
+              [CallNode(11...16)(
+                 CallNode(11...12)(
+                   nil,
+                   nil,
+                   (11...12),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "a"
+                 ),
+                 nil,
+                 (13...14),
+                 nil,
+                 ArgumentsNode(15...16)(
+                   [CallNode(15...16)(
+                      nil,
+                      nil,
+                      (15...16),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "b"
+                    )]
+                 ),
+                 nil,
+                 nil,
+                 0,
+                 "-"
+               )]
+            ),
+            (10...11),
+            (16...17)
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (18...21)
+     ),
+     DefNode(23...55)(
+       (27...30),
+       nil,
+       nil,
+       StatementsNode(33...51)(
+         [RescueModifierNode(33...51)(
+            CallNode(33...34)(nil, nil, (33...34), nil, nil, nil, nil, 0, "a"),
+            (35...41),
+            ConstantReadNode(42...51)()
+          )]
+       ),
+       [],
+       (23...26),
+       nil,
+       nil,
+       nil,
+       nil,
+       (52...55)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/dstr.txt b/test/yarp/snapshots/unparser/corpus/semantic/dstr.txt
new file mode 100644
index 0000000000..b3ea49149c
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/dstr.txt
@@ -0,0 +1,257 @@
+ProgramNode(0...608)(
+  [],
+  StatementsNode(0...608)(
+    [InterpolatedStringNode(0...10)((0...5), [], (6...10)),
+     InterpolatedStringNode(11...23)((11...18), [], (19...23)),
+     InterpolatedStringNode(24...35)((24...30), [], (31...35)),
+     InterpolatedStringNode(36...49)((36...44), [], (45...49)),
+     InterpolatedStringNode(50...64)(
+       (50...55),
+       [StringNode(56...60)(nil, (56...60), nil, "  a\n")],
+       (60...64)
+     ),
+     InterpolatedStringNode(65...81)(
+       (65...72),
+       [StringNode(73...77)(nil, (73...77), nil, "  a\n")],
+       (77...81)
+     ),
+     InterpolatedStringNode(82...102)(
+       (82...87),
+       [StringNode(88...94)(nil, (88...94), nil, "  a\n" + "  "),
+        EmbeddedStatementsNode(94...97)((94...96), nil, (96...97)),
+        StringNode(97...98)(nil, (97...98), nil, "\n")],
+       (98...102)
+     ),
+     InterpolatedStringNode(103...124)(
+       (103...109),
+       [StringNode(110...116)(nil, (110...116), nil, "a\n"),
+        EmbeddedStatementsNode(116...119)((116...118), nil, (118...119)),
+        StringNode(119...120)(nil, (119...120), nil, "\n")],
+       (120...124)
+     ),
+     InterpolatedStringNode(125...150)(
+       (125...131),
+       [StringNode(132...138)(nil, (132...138), nil, "a\n"),
+        EmbeddedStatementsNode(138...141)((138...140), nil, (140...141)),
+        StringNode(141...146)(nil, (141...146), nil, "\n" + "b\n")],
+       (146...150)
+     ),
+     InterpolatedStringNode(151...172)(
+       (151...157),
+       [StringNode(158...168)(nil, (158...168), nil, "a\n" + "  b\n")],
+       (168...172)
+     ),
+     InterpolatedStringNode(173...190)(
+       (173...180),
+       [StringNode(181...186)(nil, (181...186), nil, "a\n" + "\n" + "b\n")],
+       (186...190)
+     ),
+     InterpolatedStringNode(191...210)(
+       (191...198),
+       [StringNode(199...206)(nil, (199...206), nil, " a\n" + "\n" + " b\n")],
+       (206...210)
+     ),
+     InterpolatedStringNode(211...229)(
+       (211...218),
+       [StringNode(219...225)(nil, (219...225), nil, " a\\nb\n")],
+       (225...229)
+     ),
+     InterpolatedStringNode(230...251)(
+       (230...235),
+       [EmbeddedStatementsNode(236...239)((236...238), nil, (238...239)),
+        StringNode(239...242)(nil, (239...242), nil, "a\n" + " "),
+        EmbeddedStatementsNode(242...245)((242...244), nil, (244...245)),
+        StringNode(245...247)(nil, (245...247), nil, "a\n")],
+       (247...251)
+     ),
+     InterpolatedStringNode(252...275)(
+       (252...257),
+       [StringNode(258...260)(nil, (258...260), nil, "  "),
+        EmbeddedStatementsNode(260...263)((260...262), nil, (262...263)),
+        StringNode(263...271)(nil, (263...271), nil, "\n" + "  \#{}\n")],
+       (271...275)
+     ),
+     InterpolatedStringNode(276...296)(
+       (276...281),
+       [StringNode(282...284)(nil, (282...284), nil, " a"),
+        EmbeddedStatementsNode(284...287)((284...286), nil, (286...287)),
+        StringNode(287...292)(nil, (287...292), nil, "b\n" + " c\n")],
+       (292...296)
+     ),
+     InterpolatedStringNode(297...314)(
+       (297...303),
+       [StringNode(304...306)(nil, (304...306), nil, ""),
+        EmbeddedStatementsNode(306...309)((306...308), nil, (308...309)),
+        StringNode(309...310)(nil, (309...310), nil, "\n")],
+       (310...314)
+     ),
+     IfNode(315...349)(
+       (315...317),
+       TrueNode(318...322)(),
+       StatementsNode(325...346)(
+         [InterpolatedStringNode(325...346)(
+            (325...331),
+            [StringNode(332...336)(nil, (332...336), nil, ""),
+             EmbeddedStatementsNode(336...339)((336...338), nil, (338...339)),
+             StringNode(339...340)(nil, (339...340), nil, "\n")],
+            (340...346)
+          )]
+       ),
+       nil,
+       (346...349)
+     ),
+     IfNode(351...386)(
+       (351...353),
+       TrueNode(354...358)(),
+       StatementsNode(361...383)(
+         [InterpolatedStringNode(361...383)(
+            (361...367),
+            [StringNode(368...373)(nil, (368...373), nil, "b"),
+             EmbeddedStatementsNode(373...376)((373...375), nil, (375...376)),
+             StringNode(376...377)(nil, (376...377), nil, "\n")],
+            (377...383)
+          )]
+       ),
+       nil,
+       (383...386)
+     ),
+     IfNode(388...423)(
+       (388...390),
+       TrueNode(391...395)(),
+       StatementsNode(398...420)(
+         [InterpolatedStringNode(398...420)(
+            (398...404),
+            [StringNode(405...409)(nil, (405...409), nil, ""),
+             EmbeddedStatementsNode(409...412)((409...411), nil, (411...412)),
+             StringNode(412...414)(nil, (412...414), nil, "a\n")],
+            (414...420)
+          )]
+       ),
+       nil,
+       (420...423)
+     ),
+     IfNode(425...464)(
+       (425...427),
+       TrueNode(428...432)(),
+       StatementsNode(435...461)(
+         [InterpolatedStringNode(435...461)(
+            (435...443),
+            [StringNode(444...455)(
+               nil,
+               (444...455),
+               nil,
+               "   a\n" + "\n" + "   b\n"
+             )],
+            (455...461)
+          )]
+       ),
+       nil,
+       (461...464)
+     ),
+     InterpolatedStringNode(466...472)(
+       (466...467),
+       [EmbeddedStatementsNode(467...470)((467...469), nil, (469...470)),
+        StringNode(470...471)(nil, (470...471), nil, "a")],
+       (471...472)
+     ),
+     InterpolatedStringNode(474...486)(
+       (474...476),
+       [StringNode(476...479)(nil, (476...479), nil, "\n" + "\""),
+        EmbeddedStatementsNode(479...482)((479...481), nil, (481...482)),
+        StringNode(482...485)(nil, (482...485), nil, "\"\n")],
+       (485...486)
+     ),
+     InterpolatedStringNode(488...502)(
+       (488...491),
+       [StringNode(491...495)(nil, (491...495), nil, "-\n" + "\""),
+        EmbeddedStatementsNode(495...498)((495...497), nil, (497...498)),
+        StringNode(498...501)(nil, (498...501), nil, "\"\n")],
+       (501...502)
+     ),
+     InterpolatedStringNode(504...513)(
+       (504...505),
+       [StringNode(505...507)(nil, (505...507), nil, "a\n"),
+        EmbeddedStatementsNode(507...510)((507...509), nil, (509...510)),
+        StringNode(510...512)(nil, (510...512), nil, "\n" + "b")],
+       (512...513)
+     ),
+     InterpolatedStringNode(515...525)(
+       (515...516),
+       [StringNode(516...519)(nil, (516...519), nil, "a\n"),
+        EmbeddedStatementsNode(519...522)((519...521), nil, (521...522)),
+        StringNode(522...524)(nil, (522...524), nil, "\n" + "b")],
+       (524...525)
+     ),
+     InterpolatedStringNode(527...537)(
+       (527...528),
+       [StringNode(528...530)(nil, (528...530), nil, "a\n"),
+        EmbeddedStatementsNode(530...533)((530...532), nil, (532...533)),
+        StringNode(533...536)(nil, (533...536), nil, "\n" + "b")],
+       (536...537)
+     ),
+     StringConcatNode(539...550)(
+       StringNode(539...542)((539...540), (540...541), (541...542), "a"),
+       InterpolatedStringNode(545...550)(
+         (545...546),
+         [EmbeddedStatementsNode(546...549)((546...548), nil, (548...549))],
+         (549...550)
+       )
+     ),
+     StringConcatNode(552...560)(
+       StringNode(552...554)((552...553), (553...553), (553...554), ""),
+       StringConcatNode(555...560)(
+         StringNode(555...557)((555...556), (556...556), (556...557), ""),
+         StringNode(558...560)((558...559), (559...559), (559...560), "")
+       )
+     ),
+     StringConcatNode(562...574)(
+       InterpolatedStringNode(562...570)(
+         (562...563),
+         [StringNode(563...564)(nil, (563...564), nil, "a"),
+          EmbeddedStatementsNode(564...569)(
+            (564...566),
+            StatementsNode(566...568)([InstanceVariableReadNode(566...568)()]),
+            (568...569)
+          )],
+         (569...570)
+       ),
+       StringNode(571...574)((571...572), (572...573), (573...574), "b")
+     ),
+     StringConcatNode(575...585)(
+       InterpolatedStringNode(575...581)(
+         (575...576),
+         [StringNode(576...577)(nil, (576...577), nil, "a"),
+          EmbeddedVariableNode(577...580)(
+            (577...578),
+            InstanceVariableReadNode(578...580)()
+          )],
+         (580...581)
+       ),
+       StringNode(582...585)((582...583), (583...584), (584...585), "b")
+     ),
+     StringConcatNode(586...596)(
+       InterpolatedStringNode(586...592)(
+         (586...587),
+         [StringNode(587...588)(nil, (587...588), nil, "a"),
+          EmbeddedVariableNode(588...591)(
+            (588...589),
+            GlobalVariableReadNode(589...591)()
+          )],
+         (591...592)
+       ),
+       StringNode(593...596)((593...594), (594...595), (595...596), "b")
+     ),
+     StringConcatNode(597...608)(
+       InterpolatedStringNode(597...604)(
+         (597...598),
+         [StringNode(598...599)(nil, (598...599), nil, "a"),
+          EmbeddedVariableNode(599...603)(
+            (599...600),
+            ClassVariableReadNode(600...603)()
+          )],
+         (603...604)
+       ),
+       StringNode(605...608)((605...606), (606...607), (607...608), "b")
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/kwbegin.txt b/test/yarp/snapshots/unparser/corpus/semantic/kwbegin.txt
new file mode 100644
index 0000000000..b0ea59e21d
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/kwbegin.txt
@@ -0,0 +1,184 @@
+ProgramNode(0...215)(
+  [],
+  StatementsNode(0...215)(
+    [BeginNode(0...16)(
+       (0...5),
+       nil,
+       RescueNode(6...12)((6...12), [], nil, nil, nil, nil),
+       nil,
+       nil,
+       (13...16)
+     ),
+     BeginNode(18...39)(
+       (18...23),
+       nil,
+       RescueNode(24...30)((24...30), [], nil, nil, nil, nil),
+       ElseNode(31...39)((31...35), nil, (36...39)),
+       nil,
+       (36...39)
+     ),
+     BeginNode(41...54)(
+       (41...46),
+       StatementsNode(49...50)(
+         [CallNode(49...50)(nil, nil, (49...50), nil, nil, nil, nil, 0, "a")]
+       ),
+       nil,
+       nil,
+       nil,
+       (51...54)
+     ),
+     BeginNode(56...80)(
+       (56...61),
+       StatementsNode(64...65)(
+         [CallNode(64...65)(nil, nil, (64...65), nil, nil, nil, nil, 0, "a")]
+       ),
+       RescueNode(66...76)(
+         (66...72),
+         [],
+         nil,
+         nil,
+         StatementsNode(75...76)(
+           [CallNode(75...76)(nil, nil, (75...76), nil, nil, nil, nil, 0, "b")]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (77...80)
+     ),
+     BeginNode(82...110)(
+       (82...87),
+       StatementsNode(90...95)(
+         [CallNode(90...91)(nil, nil, (90...91), nil, nil, nil, nil, 0, "a"),
+          CallNode(94...95)(nil, nil, (94...95), nil, nil, nil, nil, 0, "b")]
+       ),
+       RescueNode(96...106)(
+         (96...102),
+         [],
+         nil,
+         nil,
+         StatementsNode(105...106)(
+           [CallNode(105...106)(
+              nil,
+              nil,
+              (105...106),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (107...110)
+     ),
+     BeginNode(112...135)(
+       (112...117),
+       nil,
+       RescueNode(118...126)(
+         (118...124),
+         [ConstantReadNode(125...126)()],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       ElseNode(127...135)((127...131), nil, (132...135)),
+       nil,
+       (132...135)
+     ),
+     BeginNode(137...163)(
+       (137...142),
+       nil,
+       RescueNode(144...152)(
+         (144...150),
+         [ConstantReadNode(151...152)()],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       ElseNode(154...163)((154...158), nil, (160...163)),
+       nil,
+       (160...163)
+     ),
+     BeginNode(165...215)(
+       (165...170),
+       StatementsNode(173...174)(
+         [CallNode(173...174)(
+            nil,
+            nil,
+            (173...174),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       RescueNode(175...200)(
+         (175...181),
+         [ConstantReadNode(182...183)()],
+         nil,
+         nil,
+         StatementsNode(186...187)(
+           [CallNode(186...187)(
+              nil,
+              nil,
+              (186...187),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "b"
+            )]
+         ),
+         RescueNode(188...200)(
+           (188...194),
+           [ConstantReadNode(195...196)()],
+           nil,
+           nil,
+           StatementsNode(199...200)(
+             [CallNode(199...200)(
+                nil,
+                nil,
+                (199...200),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "c"
+              )]
+           ),
+           nil
+         )
+       ),
+       nil,
+       EnsureNode(201...215)(
+         (201...207),
+         StatementsNode(210...211)(
+           [CallNode(210...211)(
+              nil,
+              nil,
+              (210...211),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "d"
+            )]
+         ),
+         (212...215)
+       ),
+       (212...215)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/literal.txt b/test/yarp/snapshots/unparser/corpus/semantic/literal.txt
new file mode 100644
index 0000000000..30225ed2ca
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/literal.txt
@@ -0,0 +1,93 @@
+ProgramNode(0...131)(
+  [],
+  StatementsNode(0...131)(
+    [RationalNode(0...4)(FloatNode(0...3)()),
+     CallNode(5...8)(
+       RationalNode(6...8)(IntegerNode(6...7)()),
+       nil,
+       (5...6),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     IntegerNode(9...12)(),
+     IntegerNode(13...18)(),
+     FloatNode(19...23)(),
+     FloatNode(24...38)(),
+     CallNode(39...54)(
+       FloatNode(40...54)(),
+       nil,
+       (39...40),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     StringNode(55...57)((55...56), (56...57), nil, "c"),
+     RegularExpressionNode(58...63)((58...61), (61...62), (62...63), "/", 0),
+     RegularExpressionNode(64...70)((64...67), (67...69), (69...70), ")", 0),
+     InterpolatedRegularExpressionNode(71...85)(
+       (71...74),
+       [EmbeddedStatementsNode(74...81)(
+          (74...76),
+          StatementsNode(76...80)([InstanceVariableReadNode(76...80)()]),
+          (80...81)
+        ),
+        StringNode(81...84)(nil, (81...84), nil, "baz")],
+       (84...85),
+       0
+     ),
+     FloatNode(86...102)(),
+     CallNode(103...120)(
+       FloatNode(104...120)(),
+       nil,
+       (103...104),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     CallNode(121...131)(
+       nil,
+       nil,
+       (121...122),
+       (122...123),
+       ArgumentsNode(123...130)(
+         [CallNode(123...130)(
+            nil,
+            nil,
+            (123...126),
+            nil,
+            ArgumentsNode(127...130)(
+              [CallNode(127...130)(
+                 nil,
+                 nil,
+                 (127...130),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "foo"
+          )]
+       ),
+       (130...131),
+       nil,
+       0,
+       "w"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/send.txt b/test/yarp/snapshots/unparser/corpus/semantic/send.txt
new file mode 100644
index 0000000000..4f2c294e9e
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/send.txt
@@ -0,0 +1,117 @@
+ProgramNode(0...44)(
+  [],
+  StatementsNode(0...44)(
+    [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+     CallNode(4...10)(
+       nil,
+       nil,
+       (4...7),
+       (7...8),
+       ArgumentsNode(8...9)([IntegerNode(8...9)()]),
+       (9...10),
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(12...27)(
+       CallNode(12...22)(
+         CallNode(12...20)(
+           CallNode(12...13)(nil, nil, (12...13), nil, nil, nil, nil, 0, "a"),
+           (13...14),
+           (14...17),
+           (17...18),
+           ArgumentsNode(18...19)(
+             [CallNode(18...19)(
+                nil,
+                nil,
+                (18...19),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "b"
+              )]
+           ),
+           (19...20),
+           nil,
+           0,
+           "==="
+         ),
+         (20...21),
+         (21...22),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "c"
+       ),
+       nil,
+       (23...25),
+       nil,
+       ArgumentsNode(26...27)(
+         [CallNode(26...27)(nil, nil, (26...27), nil, nil, nil, nil, 0, "d")]
+       ),
+       nil,
+       nil,
+       0,
+       "=="
+     ),
+     CallNode(29...44)(
+       CallNode(29...30)(nil, nil, (29...30), nil, nil, nil, nil, 0, "a"),
+       nil,
+       (31...33),
+       nil,
+       ArgumentsNode(34...44)(
+         [CallNode(34...44)(
+            CallNode(34...37)(
+              CallNode(34...35)(
+                nil,
+                nil,
+                (34...35),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "d"
+              ),
+              (35...36),
+              (36...37),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "c"
+            ),
+            (37...38),
+            (38...41),
+            (41...42),
+            ArgumentsNode(42...43)(
+              [CallNode(42...43)(
+                 nil,
+                 nil,
+                 (42...43),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "c"
+               )]
+            ),
+            (43...44),
+            nil,
+            0,
+            "==="
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "=="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/undef.txt b/test/yarp/snapshots/unparser/corpus/semantic/undef.txt
new file mode 100644
index 0000000000..429e904481
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/undef.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [UndefNode(0...9)([SymbolNode(6...9)(nil, (6...9), nil, "foo")], (0...5)),
+     UndefNode(10...24)(
+       [SymbolNode(16...19)(nil, (16...19), nil, "foo"),
+        SymbolNode(21...24)(nil, (21...24), nil, "bar")],
+       (10...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/unparser/corpus/semantic/while.txt b/test/yarp/snapshots/unparser/corpus/semantic/while.txt
new file mode 100644
index 0000000000..f608e21cfb
--- /dev/null
+++ b/test/yarp/snapshots/unparser/corpus/semantic/while.txt
@@ -0,0 +1,177 @@
+ProgramNode(0...188)(
+  [:foo, :a],
+  StatementsNode(0...188)(
+    [UntilNode(0...13)(
+       (2...7),
+       CallNode(8...13)(
+         nil,
+         nil,
+         (8...10),
+         nil,
+         nil,
+         nil,
+         BlockNode(11...13)([], nil, nil, (11...12), (12...13)),
+         0,
+         "b?"
+       ),
+       StatementsNode(0...1)(
+         [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a")]
+       )
+     ),
+     UntilNode(15...34)(
+       (15...20),
+       CallNode(21...26)(
+         nil,
+         nil,
+         (21...23),
+         nil,
+         nil,
+         nil,
+         BlockNode(24...26)([], nil, nil, (24...25), (25...26)),
+         0,
+         "b?"
+       ),
+       StatementsNode(29...30)(
+         [CallNode(29...30)(nil, nil, (29...30), nil, nil, nil, nil, 0, "a")]
+       )
+     ),
+     WhileNode(36...55)(
+       (46...51),
+       LocalVariableReadNode(52...55)(:foo, 0),
+       StatementsNode(36...45)(
+         [LocalVariableWriteNode(36...45)(
+            :foo,
+            0,
+            CallNode(42...45)(
+              nil,
+              nil,
+              (42...45),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            ),
+            (36...39),
+            (40...41)
+          )]
+       )
+     ),
+     UntilNode(57...75)(
+       (59...64),
+       AndNode(65...75)(
+         CallNode(65...66)(nil, nil, (65...66), nil, nil, nil, nil, 0, "b"),
+         CallNode(70...75)(
+           nil,
+           nil,
+           (70...71),
+           nil,
+           nil,
+           nil,
+           BlockNode(72...75)([], nil, nil, (72...73), (74...75)),
+           0,
+           "a"
+         ),
+         (67...69)
+       ),
+       StatementsNode(57...58)(
+         [CallNode(57...58)(nil, nil, (57...58), nil, nil, nil, nil, 0, "a")]
+       )
+     ),
+     WhileNode(77...96)(
+       (77...82),
+       LocalVariableWriteNode(83...88)(
+         :a,
+         0,
+         CallNode(87...88)(nil, nil, (87...88), nil, nil, nil, nil, 0, "b"),
+         (83...84),
+         (85...86)
+       ),
+       StatementsNode(91...92)([LocalVariableReadNode(91...92)(:a, 0)])
+     ),
+     UntilNode(98...130)(
+       (100...105),
+       CallNode(106...130)(
+         nil,
+         nil,
+         (106...107),
+         (107...108),
+         ArgumentsNode(108...123)(
+           [InterpolatedStringNode(108...123)((108...114), [], (119...123))]
+         ),
+         (114...115),
+         BlockNode(116...130)(
+           [],
+           nil,
+           StatementsNode(125...126)(
+             [CallNode(125...126)(
+                nil,
+                nil,
+                (125...126),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "c"
+              )]
+           ),
+           (116...118),
+           (127...130)
+         ),
+         0,
+         "b"
+       ),
+       StatementsNode(98...99)([LocalVariableReadNode(98...99)(:a, 0)])
+     ),
+     ModuleNode(132...188)(
+       [:foo],
+       (132...138),
+       ConstantReadNode(139...140)(),
+       StatementsNode(143...184)(
+         [LocalVariableWriteNode(143...152)(
+            :foo,
+            0,
+            CallNode(149...152)(
+              nil,
+              nil,
+              (149...152),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "exp"
+            ),
+            (143...146),
+            (147...148)
+          ),
+          WhileNode(155...184)(
+            (155...160),
+            LocalVariableReadNode(161...164)(:foo, 0),
+            StatementsNode(169...178)(
+              [LocalVariableWriteNode(169...178)(
+                 :foo,
+                 0,
+                 CallNode(175...178)(
+                   nil,
+                   nil,
+                   (175...178),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "bar"
+                 ),
+                 (169...172),
+                 (173...174)
+               )]
+            )
+          )]
+       ),
+       (185...188)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/until.txt b/test/yarp/snapshots/until.txt
new file mode 100644
index 0000000000..c9ae1f6fbd
--- /dev/null
+++ b/test/yarp/snapshots/until.txt
@@ -0,0 +1,60 @@
+ProgramNode(0...109)(
+  [],
+  StatementsNode(0...109)(
+    [UntilNode(0...18)(
+       (0...5),
+       TrueNode(6...10)(),
+       StatementsNode(12...13)([IntegerNode(12...13)()])
+     ),
+     UntilNode(20...32)(
+       (22...27),
+       TrueNode(28...32)(),
+       StatementsNode(20...21)([IntegerNode(20...21)()])
+     ),
+     UntilNode(34...50)(
+       (40...45),
+       TrueNode(46...50)(),
+       StatementsNode(34...39)([BreakNode(34...39)(nil, (34...39))])
+     ),
+     UntilNode(52...67)(
+       (57...62),
+       TrueNode(63...67)(),
+       StatementsNode(52...56)([NextNode(52...56)(nil, (52...56))])
+     ),
+     UntilNode(69...86)(
+       (76...81),
+       TrueNode(82...86)(),
+       StatementsNode(69...75)([ReturnNode(69...75)((69...75), nil)])
+     ),
+     UntilNode(88...109)(
+       (99...104),
+       CallNode(105...109)(
+         nil,
+         nil,
+         (105...109),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar?"
+       ),
+       StatementsNode(88...98)(
+         [CallNode(88...98)(
+            nil,
+            nil,
+            (88...91),
+            nil,
+            ArgumentsNode(92...98)(
+              [SymbolNode(92...94)((92...93), (93...94), nil, "a"),
+               SymbolNode(96...98)((96...97), (97...98), nil, "b")]
+            ),
+            nil,
+            nil,
+            0,
+            "foo"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/variables.txt b/test/yarp/snapshots/variables.txt
new file mode 100644
index 0000000000..8976f74a38
--- /dev/null
+++ b/test/yarp/snapshots/variables.txt
@@ -0,0 +1,232 @@
+ProgramNode(0...293)(
+  [:abc, :foo, :bar, :baz],
+  StatementsNode(0...293)(
+    [ClassVariableReadNode(0...5)(),
+     ClassVariableWriteNode(7...16)(
+       (7...12),
+       IntegerNode(15...16)(),
+       (13...14)
+     ),
+     MultiWriteNode(18...34)(
+       [ClassVariableWriteNode(18...23)((18...23), nil, nil),
+        ClassVariableWriteNode(25...30)((25...30), nil, nil)],
+       (31...32),
+       IntegerNode(33...34)(),
+       nil,
+       nil
+     ),
+     ClassVariableWriteNode(36...48)(
+       (36...41),
+       ArrayNode(44...48)(
+         [IntegerNode(44...45)(), IntegerNode(47...48)()],
+         nil,
+         nil
+       ),
+       (42...43)
+     ),
+     GlobalVariableWriteNode(50...58)(
+       (50...54),
+       (55...56),
+       IntegerNode(57...58)()
+     ),
+     GlobalVariableReadNode(60...64)(),
+     InstanceVariableReadNode(66...70)(),
+     InstanceVariableWriteNode(72...80)(
+       (72...76),
+       IntegerNode(79...80)(),
+       (77...78)
+     ),
+     CallNode(82...83)(nil, nil, (82...83), nil, nil, nil, nil, 0, "a"),
+     LocalVariableWriteNode(85...92)(
+       :abc,
+       0,
+       IntegerNode(91...92)(),
+       (85...88),
+       (89...90)
+     ),
+     MultiWriteNode(94...108)(
+       [GlobalVariableWriteNode(94...98)((94...98), nil, nil),
+        GlobalVariableWriteNode(100...104)((100...104), nil, nil)],
+       (105...106),
+       IntegerNode(107...108)(),
+       nil,
+       nil
+     ),
+     GlobalVariableWriteNode(110...121)(
+       (110...114),
+       (115...116),
+       ArrayNode(117...121)(
+         [IntegerNode(117...118)(), IntegerNode(120...121)()],
+         nil,
+         nil
+       )
+     ),
+     MultiWriteNode(123...137)(
+       [InstanceVariableWriteNode(123...127)((123...127), nil, nil),
+        InstanceVariableWriteNode(129...133)((129...133), nil, nil)],
+       (134...135),
+       IntegerNode(136...137)(),
+       nil,
+       nil
+     ),
+     InstanceVariableWriteNode(139...150)(
+       (139...143),
+       ArrayNode(146...150)(
+         [IntegerNode(146...147)(), IntegerNode(149...150)()],
+         nil,
+         nil
+       ),
+       (144...145)
+     ),
+     LocalVariableWriteNode(152...159)(
+       :foo,
+       0,
+       IntegerNode(158...159)(),
+       (152...155),
+       (156...157)
+     ),
+     LocalVariableWriteNode(161...171)(
+       :foo,
+       0,
+       ArrayNode(167...171)(
+         [IntegerNode(167...168)(), IntegerNode(170...171)()],
+         nil,
+         nil
+       ),
+       (161...164),
+       (165...166)
+     ),
+     LocalVariableWriteNode(173...183)(
+       :foo,
+       0,
+       ArrayNode(179...183)(
+         [IntegerNode(179...180)(), IntegerNode(182...183)()],
+         nil,
+         nil
+       ),
+       (173...176),
+       (177...178)
+     ),
+     MultiWriteNode(185...198)(
+       [LocalVariableWriteNode(185...188)(:foo, 0, nil, (185...188), nil),
+        SplatNode(190...191)((190...191), nil)],
+       (192...193),
+       ArrayNode(194...198)(
+         [IntegerNode(194...195)(), IntegerNode(197...198)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(200...211)(
+       [LocalVariableWriteNode(200...203)(:foo, 0, nil, (200...203), nil),
+        SplatNode(203...204)((203...204), nil)],
+       (205...206),
+       ArrayNode(207...211)(
+         [IntegerNode(207...208)(), IntegerNode(210...211)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(213...229)(
+       [LocalVariableWriteNode(213...216)(:foo, 0, nil, (213...216), nil),
+        SplatNode(218...222)(
+          (218...219),
+          LocalVariableWriteNode(219...222)(:bar, 0, nil, (219...222), nil)
+        )],
+       (223...224),
+       ArrayNode(225...229)(
+         [IntegerNode(225...226)(), IntegerNode(228...229)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(231...258)(
+       [LocalVariableWriteNode(231...234)(:foo, 0, nil, (231...234), nil),
+        MultiWriteNode(237...246)(
+          [LocalVariableWriteNode(237...240)(:bar, 0, nil, (237...240), nil),
+           LocalVariableWriteNode(242...245)(:baz, 0, nil, (242...245), nil)],
+          nil,
+          nil,
+          (236...237),
+          (245...246)
+        )],
+       (247...248),
+       ArrayNode(249...258)(
+         [IntegerNode(249...250)(),
+          ArrayNode(252...258)(
+            [IntegerNode(253...254)(), IntegerNode(256...257)()],
+            (252...253),
+            (257...258)
+          )],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     ),
+     LocalVariableWriteNode(260...270)(
+       :foo,
+       0,
+       SplatNode(266...270)(
+         (266...267),
+         LocalVariableReadNode(267...270)(:bar, 0)
+       ),
+       (260...263),
+       (264...265)
+     ),
+     ConstantPathWriteNode(272...282)(
+       ConstantReadNode(272...275)(),
+       (276...277),
+       ArrayNode(278...282)(
+         [IntegerNode(278...279)(), IntegerNode(281...282)()],
+         nil,
+         nil
+       )
+     ),
+     ParenthesesNode(284...293)(
+       StatementsNode(285...292)(
+         [CallNode(285...286)(
+            nil,
+            nil,
+            (285...286),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "a"
+          ),
+          CallNode(288...289)(
+            nil,
+            nil,
+            (288...289),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "b"
+          ),
+          CallNode(291...292)(
+            nil,
+            nil,
+            (291...292),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "c"
+          )]
+       ),
+       (284...285),
+       (292...293)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/while.txt b/test/yarp/snapshots/while.txt
new file mode 100644
index 0000000000..4f87258cf9
--- /dev/null
+++ b/test/yarp/snapshots/while.txt
@@ -0,0 +1,185 @@
+ProgramNode(0...314)(
+  [],
+  StatementsNode(0...314)(
+    [WhileNode(0...18)(
+       (0...5),
+       TrueNode(6...10)(),
+       StatementsNode(12...13)([IntegerNode(12...13)()])
+     ),
+     WhileNode(20...32)(
+       (22...27),
+       TrueNode(28...32)(),
+       StatementsNode(20...21)([IntegerNode(20...21)()])
+     ),
+     WhileNode(34...50)(
+       (40...45),
+       TrueNode(46...50)(),
+       StatementsNode(34...39)([BreakNode(34...39)(nil, (34...39))])
+     ),
+     WhileNode(52...67)(
+       (57...62),
+       TrueNode(63...67)(),
+       StatementsNode(52...56)([NextNode(52...56)(nil, (52...56))])
+     ),
+     WhileNode(69...86)(
+       (76...81),
+       TrueNode(82...86)(),
+       StatementsNode(69...75)([ReturnNode(69...75)((69...75), nil)])
+     ),
+     WhileNode(88...109)(
+       (99...104),
+       CallNode(105...109)(
+         nil,
+         nil,
+         (105...109),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar?"
+       ),
+       StatementsNode(88...98)(
+         [CallNode(88...98)(
+            nil,
+            nil,
+            (88...91),
+            nil,
+            ArgumentsNode(92...98)(
+              [SymbolNode(92...94)((92...93), (93...94), nil, "a"),
+               SymbolNode(96...98)((96...97), (97...98), nil, "b")]
+            ),
+            nil,
+            nil,
+            0,
+            "foo"
+          )]
+       )
+     ),
+     WhileNode(111...161)(
+       (111...116),
+       DefNode(117...149)(
+         (126...129),
+         SelfNode(121...125)(),
+         ParametersNode(130...144)(
+           [],
+           [OptionalParameterNode(130...144)(
+              :a,
+              (130...131),
+              (132...133),
+              CallNode(134...144)(
+                nil,
+                nil,
+                (134...137),
+                nil,
+                nil,
+                nil,
+                BlockNode(138...144)([], nil, nil, (138...140), (141...144)),
+                0,
+                "tap"
+              )
+            )],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         nil,
+         [:a],
+         (117...120),
+         (125...126),
+         nil,
+         nil,
+         nil,
+         (146...149)
+       ),
+       StatementsNode(151...156)([BreakNode(151...156)(nil, (151...156))])
+     ),
+     WhileNode(163...210)(
+       (163...168),
+       ClassNode(169...198)(
+         [:a],
+         (169...174),
+         ConstantReadNode(175...178)(),
+         nil,
+         nil,
+         StatementsNode(179...193)(
+           [LocalVariableWriteNode(179...193)(
+              :a,
+              0,
+              CallNode(183...193)(
+                nil,
+                nil,
+                (183...186),
+                nil,
+                nil,
+                nil,
+                BlockNode(187...193)([], nil, nil, (187...189), (190...193)),
+                0,
+                "tap"
+              ),
+              (179...180),
+              (181...182)
+            )]
+         ),
+         (195...198)
+       ),
+       StatementsNode(200...205)([BreakNode(200...205)(nil, (200...205))])
+     ),
+     WhileNode(212...260)(
+       (212...217),
+       SingletonClassNode(218...248)(
+         [],
+         (218...223),
+         (224...226),
+         SelfNode(227...231)(),
+         StatementsNode(233...243)(
+           [CallNode(233...243)(
+              nil,
+              nil,
+              (233...236),
+              nil,
+              nil,
+              nil,
+              BlockNode(237...243)([], nil, nil, (237...239), (240...243)),
+              0,
+              "tap"
+            )]
+         ),
+         (245...248)
+       ),
+       StatementsNode(250...255)([BreakNode(250...255)(nil, (250...255))])
+     ),
+     WhileNode(262...314)(
+       (262...267),
+       SingletonClassNode(268...302)(
+         [:a],
+         (268...273),
+         (274...276),
+         SelfNode(277...281)(),
+         StatementsNode(283...297)(
+           [LocalVariableWriteNode(283...297)(
+              :a,
+              0,
+              CallNode(287...297)(
+                nil,
+                nil,
+                (287...290),
+                nil,
+                nil,
+                nil,
+                BlockNode(291...297)([], nil, nil, (291...293), (294...297)),
+                0,
+                "tap"
+              ),
+              (283...284),
+              (285...286)
+            )]
+         ),
+         (299...302)
+       ),
+       StatementsNode(304...309)([BreakNode(304...309)(nil, (304...309))])
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/__ENCODING__.txt b/test/yarp/snapshots/whitequark/__ENCODING__.txt
new file mode 100644
index 0000000000..2f5aaa5dfc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/__ENCODING__.txt
@@ -0,0 +1 @@
+ProgramNode(0...12)([], StatementsNode(0...12)([SourceEncodingNode(0...12)()]))
diff --git a/test/yarp/snapshots/whitequark/__ENCODING___legacy_.txt b/test/yarp/snapshots/whitequark/__ENCODING___legacy_.txt
new file mode 100644
index 0000000000..2f5aaa5dfc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/__ENCODING___legacy_.txt
@@ -0,0 +1 @@
+ProgramNode(0...12)([], StatementsNode(0...12)([SourceEncodingNode(0...12)()]))
diff --git a/test/yarp/snapshots/whitequark/alias.txt b/test/yarp/snapshots/whitequark/alias.txt
new file mode 100644
index 0000000000..3960bea48a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/alias.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [AliasNode(0...14)(
+       SymbolNode(6...10)((6...7), (7...10), nil, "foo"),
+       SymbolNode(11...14)(nil, (11...14), nil, "bar"),
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/alias_gvar.txt b/test/yarp/snapshots/whitequark/alias_gvar.txt
new file mode 100644
index 0000000000..c615e52655
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/alias_gvar.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [AliasNode(0...11)(
+       GlobalVariableReadNode(6...8)(),
+       BackReferenceReadNode(9...11)(),
+       (0...5)
+     ),
+     AliasNode(13...24)(
+       GlobalVariableReadNode(19...21)(),
+       GlobalVariableReadNode(22...24)(),
+       (13...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ambiuous_quoted_label_in_ternary_operator.txt b/test/yarp/snapshots/whitequark/ambiuous_quoted_label_in_ternary_operator.txt
new file mode 100644
index 0000000000..481a9c5f92
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ambiuous_quoted_label_in_ternary_operator.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [IfNode(0...15)(
+       nil,
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       StatementsNode(4...10)(
+         [CallNode(4...10)(
+            CallNode(4...5)(nil, nil, (4...5), nil, nil, nil, nil, 0, "b"),
+            nil,
+            (6...7),
+            nil,
+            ArgumentsNode(8...10)(
+              [StringNode(8...10)((8...9), (9...9), (9...10), "")]
+            ),
+            nil,
+            nil,
+            0,
+            "&"
+          )]
+       ),
+       ElseNode(10...15)(
+         (10...11),
+         StatementsNode(12...15)([NilNode(12...15)()]),
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/and.txt b/test/yarp/snapshots/whitequark/and.txt
new file mode 100644
index 0000000000..6a488935e0
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/and.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [AndNode(0...10)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "bar"),
+       (4...6)
+     ),
+     AndNode(12...23)(
+       CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "foo"),
+       CallNode(20...23)(nil, nil, (20...23), nil, nil, nil, nil, 0, "bar"),
+       (16...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/and_asgn.txt b/test/yarp/snapshots/whitequark/and_asgn.txt
new file mode 100644
index 0000000000..abbaf77617
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/and_asgn.txt
@@ -0,0 +1,37 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallOperatorAndWriteNode(0...11)(
+       CallNode(0...5)(
+         CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+         (3...4),
+         (4...5),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a="
+       ),
+       (6...9),
+       IntegerNode(10...11)()
+     ),
+     CallOperatorAndWriteNode(13...28)(
+       CallNode(13...22)(
+         CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (16...22),
+         (16...17),
+         ArgumentsNode(17...21)(
+           [IntegerNode(17...18)(), IntegerNode(20...21)()]
+         ),
+         (21...22),
+         nil,
+         0,
+         "[]="
+       ),
+       (23...26),
+       IntegerNode(27...28)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/and_or_masgn.txt b/test/yarp/snapshots/whitequark/and_or_masgn.txt
new file mode 100644
index 0000000000..7fc2e35e04
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/and_or_masgn.txt
@@ -0,0 +1,61 @@
+ProgramNode(0...40)(
+  [:a, :b],
+  StatementsNode(0...40)(
+    [AndNode(0...19)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       ParenthesesNode(7...19)(
+         StatementsNode(8...18)(
+           [MultiWriteNode(8...18)(
+              [LocalVariableWriteNode(8...9)(:a, 0, nil, (8...9), nil),
+               LocalVariableWriteNode(11...12)(:b, 0, nil, (11...12), nil)],
+              (13...14),
+              CallNode(15...18)(
+                nil,
+                nil,
+                (15...18),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              nil,
+              nil
+            )]
+         ),
+         (7...8),
+         (18...19)
+       ),
+       (4...6)
+     ),
+     OrNode(21...40)(
+       CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "foo"),
+       ParenthesesNode(28...40)(
+         StatementsNode(29...39)(
+           [MultiWriteNode(29...39)(
+              [LocalVariableWriteNode(29...30)(:a, 0, nil, (29...30), nil),
+               LocalVariableWriteNode(32...33)(:b, 0, nil, (32...33), nil)],
+              (34...35),
+              CallNode(36...39)(
+                nil,
+                nil,
+                (36...39),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              nil,
+              nil
+            )]
+         ),
+         (28...29),
+         (39...40)
+       ),
+       (25...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/anonymous_blockarg.txt b/test/yarp/snapshots/whitequark/anonymous_blockarg.txt
new file mode 100644
index 0000000000..d3679ca424
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/anonymous_blockarg.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [DefNode(0...23)(
+       (4...7),
+       nil,
+       ParametersNode(8...9)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         BlockParameterNode(8...9)(nil, (8...9))
+       ),
+       StatementsNode(12...18)(
+         [CallNode(12...18)(
+            nil,
+            nil,
+            (12...15),
+            (15...16),
+            ArgumentsNode(16...17)(
+              [BlockArgumentNode(16...17)(nil, (16...17))]
+            ),
+            (17...18),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:&],
+       (0...3),
+       nil,
+       (7...8),
+       (9...10),
+       nil,
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/arg.txt b/test/yarp/snapshots/whitequark/arg.txt
new file mode 100644
index 0000000000..403c382cb7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/arg.txt
@@ -0,0 +1,48 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [DefNode(0...15)(
+       (4...5),
+       nil,
+       ParametersNode(6...9)(
+         [RequiredParameterNode(6...9)(:foo)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo],
+       (0...3),
+       nil,
+       (5...6),
+       (9...10),
+       nil,
+       (12...15)
+     ),
+     DefNode(17...37)(
+       (21...22),
+       nil,
+       ParametersNode(23...31)(
+         [RequiredParameterNode(23...26)(:foo),
+          RequiredParameterNode(28...31)(:bar)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo, :bar],
+       (17...20),
+       nil,
+       (22...23),
+       (31...32),
+       nil,
+       (34...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/arg_duplicate_ignored.txt b/test/yarp/snapshots/whitequark/arg_duplicate_ignored.txt
new file mode 100644
index 0000000000..5c88c71d50
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/arg_duplicate_ignored.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [DefNode(0...18)(
+       (4...7),
+       nil,
+       ParametersNode(8...12)(
+         [RequiredParameterNode(8...9)(:_),
+          RequiredParameterNode(11...12)(:_)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:_],
+       (0...3),
+       nil,
+       (7...8),
+       (12...13),
+       nil,
+       (15...18)
+     ),
+     DefNode(20...40)(
+       (24...27),
+       nil,
+       ParametersNode(28...34)(
+         [RequiredParameterNode(28...30)(:_a),
+          RequiredParameterNode(32...34)(:_a)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:_a],
+       (20...23),
+       nil,
+       (27...28),
+       (34...35),
+       nil,
+       (37...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/arg_label.txt b/test/yarp/snapshots/whitequark/arg_label.txt
new file mode 100644
index 0000000000..cfa55d0124
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/arg_label.txt
@@ -0,0 +1,90 @@
+ProgramNode(0...49)(
+  [],
+  StatementsNode(0...49)(
+    [DefNode(0...16)(
+       (4...7),
+       nil,
+       nil,
+       StatementsNode(9...12)(
+         [CallNode(9...12)(
+            nil,
+            nil,
+            (9...10),
+            nil,
+            ArgumentsNode(10...12)(
+              [SymbolNode(10...12)((10...11), (11...12), nil, "b")]
+            ),
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (13...16)
+     ),
+     DefNode(18...35)(
+       (22...25),
+       nil,
+       nil,
+       StatementsNode(28...31)(
+         [CallNode(28...31)(
+            nil,
+            nil,
+            (28...29),
+            nil,
+            ArgumentsNode(29...31)(
+              [SymbolNode(29...31)((29...30), (30...31), nil, "b")]
+            ),
+            nil,
+            nil,
+            0,
+            "a"
+          )]
+       ),
+       [],
+       (18...21),
+       nil,
+       (25...26),
+       (26...27),
+       nil,
+       (32...35)
+     ),
+     CallNode(37...49)(
+       nil,
+       nil,
+       (37...38),
+       nil,
+       nil,
+       nil,
+       BlockNode(39...49)(
+         [],
+         BlockParametersNode(41...43)(nil, [], (41...42), (42...43)),
+         StatementsNode(44...47)(
+           [CallNode(44...47)(
+              nil,
+              nil,
+              (44...45),
+              nil,
+              ArgumentsNode(45...47)(
+                [SymbolNode(45...47)((45...46), (46...47), nil, "b")]
+              ),
+              nil,
+              nil,
+              0,
+              "a"
+            )]
+         ),
+         (39...40),
+         (48...49)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/arg_scope.txt b/test/yarp/snapshots/whitequark/arg_scope.txt
new file mode 100644
index 0000000000..fd5ae0f61d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/arg_scope.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       nil,
+       nil,
+       (0...6),
+       nil,
+       nil,
+       nil,
+       BlockNode(6...13)(
+         [:a],
+         BlockParametersNode(7...11)(nil, [(9...10)], (7...8), (10...11)),
+         StatementsNode(11...12)([LocalVariableReadNode(11...12)(:a, 0)]),
+         (6...7),
+         (12...13)
+       ),
+       0,
+       "lambda"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/args.txt b/test/yarp/snapshots/whitequark/args.txt
new file mode 100644
index 0000000000..fe899700d2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args.txt
@@ -0,0 +1,776 @@
+ProgramNode(0...690)(
+  [],
+  StatementsNode(0...690)(
+    [DefNode(0...13)(
+       (4...5),
+       nil,
+       ParametersNode(6...8)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         BlockParameterNode(6...8)((7...8), (6...7))
+       ),
+       nil,
+       [:b],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (10...13)
+     ),
+     DefNode(15...33)(
+       (19...20),
+       nil,
+       ParametersNode(22...27)(
+         [RequiredDestructuredParameterNode(22...27)(
+            [RequiredDestructuredParameterNode(23...26)(
+               [RequiredParameterNode(24...25)(:a)],
+               (23...24),
+               (25...26)
+             )],
+            (22...23),
+            (26...27)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a],
+       (15...18),
+       nil,
+       (21...22),
+       (27...28),
+       nil,
+       (30...33)
+     ),
+     DefNode(35...51)(
+       (39...40),
+       nil,
+       ParametersNode(42...45)(
+         [RequiredDestructuredParameterNode(42...45)(
+            [SplatNode(43...44)((43...44), nil)],
+            (42...43),
+            (44...45)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [],
+       (35...38),
+       nil,
+       (41...42),
+       (45...46),
+       nil,
+       (48...51)
+     ),
+     DefNode(53...72)(
+       (57...58),
+       nil,
+       ParametersNode(60...66)(
+         [RequiredDestructuredParameterNode(60...66)(
+            [SplatNode(61...62)((61...62), nil),
+             RequiredParameterNode(64...65)(:p)],
+            (60...61),
+            (65...66)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:p],
+       (53...56),
+       nil,
+       (59...60),
+       (66...67),
+       nil,
+       (69...72)
+     ),
+     DefNode(74...91)(
+       (78...79),
+       nil,
+       ParametersNode(81...85)(
+         [RequiredDestructuredParameterNode(81...85)(
+            [SplatNode(82...84)(
+               (82...83),
+               RequiredParameterNode(83...84)(:r)
+             )],
+            (81...82),
+            (84...85)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:r],
+       (74...77),
+       nil,
+       (80...81),
+       (85...86),
+       nil,
+       (88...91)
+     ),
+     DefNode(93...113)(
+       (97...98),
+       nil,
+       ParametersNode(100...107)(
+         [RequiredDestructuredParameterNode(100...107)(
+            [SplatNode(101...103)(
+               (101...102),
+               RequiredParameterNode(102...103)(:r)
+             ),
+             RequiredParameterNode(105...106)(:p)],
+            (100...101),
+            (106...107)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:r, :p],
+       (93...96),
+       nil,
+       (99...100),
+       (107...108),
+       nil,
+       (110...113)
+     ),
+     DefNode(115...134)(
+       (119...120),
+       nil,
+       ParametersNode(122...128)(
+         [RequiredDestructuredParameterNode(122...128)(
+            [RequiredParameterNode(123...124)(:a),
+             SplatNode(126...127)((126...127), nil)],
+            (122...123),
+            (127...128)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a],
+       (115...118),
+       nil,
+       (121...122),
+       (128...129),
+       nil,
+       (131...134)
+     ),
+     DefNode(136...158)(
+       (140...141),
+       nil,
+       ParametersNode(143...152)(
+         [RequiredDestructuredParameterNode(143...152)(
+            [RequiredParameterNode(144...145)(:a),
+             SplatNode(147...148)((147...148), nil),
+             RequiredParameterNode(150...151)(:p)],
+            (143...144),
+            (151...152)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :p],
+       (136...139),
+       nil,
+       (142...143),
+       (152...153),
+       nil,
+       (155...158)
+     ),
+     DefNode(160...180)(
+       (164...165),
+       nil,
+       ParametersNode(167...174)(
+         [RequiredDestructuredParameterNode(167...174)(
+            [RequiredParameterNode(168...169)(:a),
+             SplatNode(171...173)(
+               (171...172),
+               RequiredParameterNode(172...173)(:r)
+             )],
+            (167...168),
+            (173...174)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :r],
+       (160...163),
+       nil,
+       (166...167),
+       (174...175),
+       nil,
+       (177...180)
+     ),
+     DefNode(182...205)(
+       (186...187),
+       nil,
+       ParametersNode(189...199)(
+         [RequiredDestructuredParameterNode(189...199)(
+            [RequiredParameterNode(190...191)(:a),
+             SplatNode(193...195)(
+               (193...194),
+               RequiredParameterNode(194...195)(:r)
+             ),
+             RequiredParameterNode(197...198)(:p)],
+            (189...190),
+            (198...199)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :r, :p],
+       (182...185),
+       nil,
+       (188...189),
+       (199...200),
+       nil,
+       (202...205)
+     ),
+     DefNode(207...227)(
+       (211...212),
+       nil,
+       ParametersNode(214...221)(
+         [RequiredDestructuredParameterNode(214...221)(
+            [RequiredParameterNode(215...216)(:a),
+             RequiredParameterNode(218...220)(:a1)],
+            (214...215),
+            (220...221)
+          )],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:a, :a1],
+       (207...210),
+       nil,
+       (213...214),
+       (221...222),
+       nil,
+       (224...227)
+     ),
+     DefNode(229...252)(
+       (233...234),
+       nil,
+       ParametersNode(236...246)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(236...242)(
+            (236...240),
+            IntegerNode(241...242)()
+          )],
+         nil,
+         BlockParameterNode(244...246)((245...246), (244...245))
+       ),
+       nil,
+       [:foo, :b],
+       (229...232),
+       nil,
+       (235...236),
+       (246...247),
+       nil,
+       (249...252)
+     ),
+     DefNode(254...292)(
+       (258...259),
+       nil,
+       ParametersNode(261...286)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(261...267)(
+            (261...265),
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diff --git a/test/yarp/snapshots/whitequark/args_args_assocs.txt b/test/yarp/snapshots/whitequark/args_args_assocs.txt
new file mode 100644
index 0000000000..ee787d08a2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_args_assocs.txt
@@ -0,0 +1,59 @@
+ProgramNode(0...46)(
+  [],
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+    [CallNode(0...19)(
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+)
diff --git a/test/yarp/snapshots/whitequark/args_args_assocs_comma.txt b/test/yarp/snapshots/whitequark/args_args_assocs_comma.txt
new file mode 100644
index 0000000000..fead72a533
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_args_assocs_comma.txt
@@ -0,0 +1,25 @@
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+  [],
+  StatementsNode(0...20)(
+    [CallNode(0...20)(
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+       0,
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diff --git a/test/yarp/snapshots/whitequark/args_args_comma.txt b/test/yarp/snapshots/whitequark/args_args_comma.txt
new file mode 100644
index 0000000000..ff53a58eca
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_args_comma.txt
@@ -0,0 +1,18 @@
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+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/args_args_star.txt b/test/yarp/snapshots/whitequark/args_args_star.txt
new file mode 100644
index 0000000000..52b2c41202
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_args_star.txt
@@ -0,0 +1,73 @@
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diff --git a/test/yarp/snapshots/whitequark/args_assocs.txt b/test/yarp/snapshots/whitequark/args_assocs.txt
new file mode 100644
index 0000000000..8905c41d17
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_assocs.txt
@@ -0,0 +1,125 @@
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diff --git a/test/yarp/snapshots/whitequark/args_assocs_comma.txt b/test/yarp/snapshots/whitequark/args_assocs_comma.txt
new file mode 100644
index 0000000000..0989a82c63
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_assocs_comma.txt
@@ -0,0 +1,24 @@
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diff --git a/test/yarp/snapshots/whitequark/args_assocs_legacy.txt b/test/yarp/snapshots/whitequark/args_assocs_legacy.txt
new file mode 100644
index 0000000000..8905c41d17
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_assocs_legacy.txt
@@ -0,0 +1,125 @@
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+       (42...43),
+       (43...46),
+       nil,
+       ArgumentsNode(47...59)(
+         [CallNode(47...50)(nil, nil, (47...50), nil, nil, nil, nil, 0, "foo"),
+          KeywordHashNode(52...59)(
+            [AssocNode(52...59)(
+               SymbolNode(52...54)((52...53), (53...54), nil, "a"),
+               IntegerNode(58...59)(),
+               (55...57)
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "[]="
+     ),
+     CallNode(61...76)(
+       SelfNode(61...65)(),
+       nil,
+       (65...76),
+       (65...66),
+       ArgumentsNode(66...75)(
+         [KeywordHashNode(66...75)(
+            [AssocNode(66...75)(
+               SymbolNode(66...70)((66...67), (67...70), nil, "bar"),
+               IntegerNode(74...75)(),
+               (71...73)
+             )]
+          )]
+       ),
+       (75...76),
+       nil,
+       0,
+       "[]"
+     ),
+     SuperNode(78...95)(
+       (78...83),
+       (83...84),
+       ArgumentsNode(84...94)(
+         [KeywordHashNode(84...94)(
+            [AssocNode(84...94)(
+               SymbolNode(84...88)((84...85), (85...88), nil, "foo"),
+               IntegerNode(92...94)(),
+               (89...91)
+             )]
+          )]
+       ),
+       (94...95),
+       nil
+     ),
+     YieldNode(97...114)(
+       (97...102),
+       (102...103),
+       ArgumentsNode(103...113)(
+         [KeywordHashNode(103...113)(
+            [AssocNode(103...113)(
+               SymbolNode(103...107)((103...104), (104...107), nil, "foo"),
+               IntegerNode(111...113)(),
+               (108...110)
+             )]
+          )]
+       ),
+       (113...114)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/args_block_pass.txt b/test/yarp/snapshots/whitequark/args_block_pass.txt
new file mode 100644
index 0000000000..548019ab2f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_block_pass.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...8)(
+         [BlockArgumentNode(4...8)(
+            CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "bar"),
+            (4...5)
+          )]
+       ),
+       (8...9),
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/args_cmd.txt b/test/yarp/snapshots/whitequark/args_cmd.txt
new file mode 100644
index 0000000000..cbb8ec0769
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_cmd.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...10)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...9)(
+         [CallNode(4...9)(
+            nil,
+            nil,
+            (4...5),
+            nil,
+            ArgumentsNode(6...9)(
+              [CallNode(6...9)(
+                 nil,
+                 nil,
+                 (6...9),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "f"
+          )]
+       ),
+       (9...10),
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/args_star.txt b/test/yarp/snapshots/whitequark/args_star.txt
new file mode 100644
index 0000000000..160865108b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/args_star.txt
@@ -0,0 +1,61 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...8)(
+         [SplatNode(4...8)(
+            (4...5),
+            CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "bar")
+          )]
+       ),
+       (8...9),
+       nil,
+       0,
+       "fun"
+     ),
+     CallNode(11...26)(
+       nil,
+       nil,
+       (11...14),
+       (14...15),
+       ArgumentsNode(15...25)(
+         [SplatNode(15...19)(
+            (15...16),
+            CallNode(16...19)(
+              nil,
+              nil,
+              (16...19),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )
+          ),
+          BlockArgumentNode(21...25)(
+            CallNode(22...25)(
+              nil,
+              nil,
+              (22...25),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            ),
+            (21...22)
+          )]
+       ),
+       (25...26),
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_assocs.txt b/test/yarp/snapshots/whitequark/array_assocs.txt
new file mode 100644
index 0000000000..6dc20662ca
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_assocs.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [ArrayNode(0...10)(
+       [KeywordHashNode(2...8)(
+          [AssocNode(2...8)(
+             IntegerNode(2...3)(),
+             IntegerNode(7...8)(),
+             (4...6)
+           )]
+        )],
+       (0...1),
+       (9...10)
+     ),
+     ArrayNode(12...25)(
+       [IntegerNode(14...15)(),
+        KeywordHashNode(17...23)(
+          [AssocNode(17...23)(
+             IntegerNode(17...18)(),
+             IntegerNode(22...23)(),
+             (19...21)
+           )]
+        )],
+       (12...13),
+       (24...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_plain.txt b/test/yarp/snapshots/whitequark/array_plain.txt
new file mode 100644
index 0000000000..d8c89ba8b9
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_plain.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [ArrayNode(0...6)(
+       [IntegerNode(1...2)(), IntegerNode(4...5)()],
+       (0...1),
+       (5...6)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_splat.txt b/test/yarp/snapshots/whitequark/array_splat.txt
new file mode 100644
index 0000000000..a691e67405
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_splat.txt
@@ -0,0 +1,32 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [ArrayNode(0...6)(
+       [SplatNode(1...5)(
+          (1...2),
+          CallNode(2...5)(nil, nil, (2...5), nil, nil, nil, nil, 0, "foo")
+        )],
+       (0...1),
+       (5...6)
+     ),
+     ArrayNode(8...20)(
+       [IntegerNode(9...10)(),
+        SplatNode(12...16)(
+          (12...13),
+          CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo")
+        ),
+        IntegerNode(18...19)()],
+       (8...9),
+       (19...20)
+     ),
+     ArrayNode(22...31)(
+       [IntegerNode(23...24)(),
+        SplatNode(26...30)(
+          (26...27),
+          CallNode(27...30)(nil, nil, (27...30), nil, nil, nil, nil, 0, "foo")
+        )],
+       (22...23),
+       (30...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_symbols.txt b/test/yarp/snapshots/whitequark/array_symbols.txt
new file mode 100644
index 0000000000..9d036af7cf
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_symbols.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...11)(
+       [SymbolNode(3...6)(nil, (3...6), nil, "foo"),
+        SymbolNode(7...10)(nil, (7...10), nil, "bar")],
+       (0...3),
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_symbols_empty.txt b/test/yarp/snapshots/whitequark/array_symbols_empty.txt
new file mode 100644
index 0000000000..ce2b82c914
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_symbols_empty.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [ArrayNode(0...4)([], (0...3), (3...4)),
+     ArrayNode(6...10)([], (6...9), (9...10))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_symbols_interp.txt b/test/yarp/snapshots/whitequark/array_symbols_interp.txt
new file mode 100644
index 0000000000..204ee1372d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_symbols_interp.txt
@@ -0,0 +1,57 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [ArrayNode(0...14)(
+       [SymbolNode(3...6)(nil, (3...6), nil, "foo"),
+        InterpolatedSymbolNode(7...13)(
+          nil,
+          [EmbeddedStatementsNode(7...13)(
+             (7...9),
+             StatementsNode(9...12)(
+               [CallNode(9...12)(
+                  nil,
+                  nil,
+                  (9...12),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "bar"
+                )]
+             ),
+             (12...13)
+           )],
+          nil
+        )],
+       (0...3),
+       (13...14)
+     ),
+     ArrayNode(16...29)(
+       [InterpolatedSymbolNode(19...28)(
+          nil,
+          [StringNode(19...22)(nil, (19...22), nil, "foo"),
+           EmbeddedStatementsNode(22...28)(
+             (22...24),
+             StatementsNode(24...27)(
+               [CallNode(24...27)(
+                  nil,
+                  nil,
+                  (24...27),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "bar"
+                )]
+             ),
+             (27...28)
+           )],
+          nil
+        )],
+       (16...19),
+       (28...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_words.txt b/test/yarp/snapshots/whitequark/array_words.txt
new file mode 100644
index 0000000000..3308b6b7f2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_words.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [ArrayNode(0...11)(
+       [StringNode(3...6)(nil, (3...6), nil, "foo"),
+        StringNode(7...10)(nil, (7...10), nil, "bar")],
+       (0...3),
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_words_empty.txt b/test/yarp/snapshots/whitequark/array_words_empty.txt
new file mode 100644
index 0000000000..ce2b82c914
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_words_empty.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [ArrayNode(0...4)([], (0...3), (3...4)),
+     ArrayNode(6...10)([], (6...9), (9...10))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/array_words_interp.txt b/test/yarp/snapshots/whitequark/array_words_interp.txt
new file mode 100644
index 0000000000..e90e20d5e2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/array_words_interp.txt
@@ -0,0 +1,62 @@
+ProgramNode(0...38)(
+  [],
+  StatementsNode(0...38)(
+    [ArrayNode(0...14)(
+       [StringNode(3...6)(nil, (3...6), nil, "foo"),
+        InterpolatedStringNode(0...13)(
+          nil,
+          [EmbeddedStatementsNode(7...13)(
+             (7...9),
+             StatementsNode(9...12)(
+               [CallNode(9...12)(
+                  nil,
+                  nil,
+                  (9...12),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "bar"
+                )]
+             ),
+             (12...13)
+           )],
+          nil
+        )],
+       (0...3),
+       (13...14)
+     ),
+     ArrayNode(16...38)(
+       [StringNode(19...22)(nil, (19...22), nil, "foo"),
+        InterpolatedStringNode(0...37)(
+          nil,
+          [EmbeddedStatementsNode(23...29)(
+             (23...25),
+             StatementsNode(25...28)(
+               [CallNode(25...28)(
+                  nil,
+                  nil,
+                  (25...28),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "bar"
+                )]
+             ),
+             (28...29)
+           ),
+           StringNode(29...32)(nil, (29...32), nil, "foo"),
+           EmbeddedVariableNode(32...37)(
+             (32...33),
+             InstanceVariableReadNode(33...37)()
+           )],
+          nil
+        )],
+       (16...19),
+       (37...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/asgn_cmd.txt b/test/yarp/snapshots/whitequark/asgn_cmd.txt
new file mode 100644
index 0000000000..218c28dc0f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/asgn_cmd.txt
@@ -0,0 +1,45 @@
+ProgramNode(0...30)(
+  [:foo, :bar],
+  StatementsNode(0...30)(
+    [LocalVariableWriteNode(0...17)(
+       :foo,
+       0,
+       LocalVariableWriteNode(6...17)(
+         :bar,
+         0,
+         CallNode(12...17)(
+           nil,
+           nil,
+           (12...13),
+           nil,
+           ArgumentsNode(14...17)([LocalVariableReadNode(14...17)(:foo, 0)]),
+           nil,
+           nil,
+           0,
+           "m"
+         ),
+         (6...9),
+         (10...11)
+       ),
+       (0...3),
+       (4...5)
+     ),
+     LocalVariableWriteNode(19...30)(
+       :foo,
+       0,
+       CallNode(25...30)(
+         nil,
+         nil,
+         (25...26),
+         nil,
+         ArgumentsNode(27...30)([LocalVariableReadNode(27...30)(:foo, 0)]),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       (19...22),
+       (23...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/asgn_mrhs.txt b/test/yarp/snapshots/whitequark/asgn_mrhs.txt
new file mode 100644
index 0000000000..947c8e4450
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/asgn_mrhs.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...41)(
+  [:foo],
+  StatementsNode(0...41)(
+    [LocalVariableWriteNode(0...10)(
+       :foo,
+       0,
+       SplatNode(6...10)(
+         (6...7),
+         CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "bar")
+       ),
+       (0...3),
+       (4...5)
+     ),
+     LocalVariableWriteNode(12...24)(
+       :foo,
+       0,
+       ArrayNode(18...24)(
+         [CallNode(18...21)(nil, nil, (18...21), nil, nil, nil, nil, 0, "bar"),
+          IntegerNode(23...24)()],
+         nil,
+         nil
+       ),
+       (12...15),
+       (16...17)
+     ),
+     LocalVariableWriteNode(26...41)(
+       :foo,
+       0,
+       ArrayNode(32...41)(
+         [CallNode(32...35)(nil, nil, (32...35), nil, nil, nil, nil, 0, "baz"),
+          SplatNode(37...41)(
+            (37...38),
+            CallNode(38...41)(
+              nil,
+              nil,
+              (38...41),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )
+          )],
+         nil,
+         nil
+       ),
+       (26...29),
+       (30...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/back_ref.txt b/test/yarp/snapshots/whitequark/back_ref.txt
new file mode 100644
index 0000000000..d072409376
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/back_ref.txt
@@ -0,0 +1 @@
+ProgramNode(0...2)([], StatementsNode(0...2)([BackReferenceReadNode(0...2)()]))
diff --git a/test/yarp/snapshots/whitequark/bang.txt b/test/yarp/snapshots/whitequark/bang.txt
new file mode 100644
index 0000000000..25f3da6f04
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bang.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       CallNode(1...4)(nil, nil, (1...4), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bang_cmd.txt b/test/yarp/snapshots/whitequark/bang_cmd.txt
new file mode 100644
index 0000000000..3e5080cebd
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bang_cmd.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...6)(
+  [],
+  StatementsNode(0...6)(
+    [CallNode(0...6)(
+       CallNode(1...6)(
+         nil,
+         nil,
+         (1...2),
+         nil,
+         ArgumentsNode(3...6)(
+           [CallNode(3...6)(nil, nil, (3...6), nil, nil, nil, nil, 0, "foo")]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/begin_cmdarg.txt b/test/yarp/snapshots/whitequark/begin_cmdarg.txt
new file mode 100644
index 0000000000..2d1d4e53e5
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/begin_cmdarg.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallNode(0...28)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...28)(
+         [BeginNode(2...28)(
+            (2...7),
+            StatementsNode(8...24)(
+              [CallNode(8...24)(
+                 IntegerNode(8...9)(),
+                 (9...10),
+                 (10...15),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(16...24)(
+                   [],
+                   nil,
+                   StatementsNode(19...20)([IntegerNode(19...20)()]),
+                   (16...18),
+                   (21...24)
+                 ),
+                 0,
+                 "times"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (25...28)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/beginless_erange_after_newline.txt b/test/yarp/snapshots/whitequark/beginless_erange_after_newline.txt
new file mode 100644
index 0000000000..50383976f2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/beginless_erange_after_newline.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+     RangeNode(4...10)(nil, IntegerNode(7...10)(), (4...7), 1)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/beginless_irange_after_newline.txt b/test/yarp/snapshots/whitequark/beginless_irange_after_newline.txt
new file mode 100644
index 0000000000..a49985c762
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/beginless_irange_after_newline.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+     RangeNode(4...9)(nil, IntegerNode(6...9)(), (4...6), 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/beginless_range.txt b/test/yarp/snapshots/whitequark/beginless_range.txt
new file mode 100644
index 0000000000..3750508629
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/beginless_range.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [RangeNode(0...6)(nil, IntegerNode(3...6)(), (0...3), 1),
+     RangeNode(8...13)(nil, IntegerNode(10...13)(), (8...10), 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/blockarg.txt b/test/yarp/snapshots/whitequark/blockarg.txt
new file mode 100644
index 0000000000..544b14f8bb
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/blockarg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [DefNode(0...18)(
+       (4...5),
+       nil,
+       ParametersNode(6...12)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         BlockParameterNode(6...12)((7...12), (6...7))
+       ),
+       nil,
+       [:block],
+       (0...3),
+       nil,
+       (5...6),
+       (12...13),
+       nil,
+       (15...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/blockargs.txt b/test/yarp/snapshots/whitequark/blockargs.txt
new file mode 100644
index 0000000000..3115c58df1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/blockargs.txt
@@ -0,0 +1,1052 @@
+ProgramNode(0...550)(
+  [],
+  StatementsNode(0...550)(
+    [CallNode(0...5)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(1...5)([], nil, nil, (1...2), (4...5)),
+       0,
+       "f"
+     ),
+     CallNode(7...15)(
+       nil,
+       nil,
+       (7...8),
+       nil,
+       nil,
+       nil,
+       BlockNode(8...15)(
+         [],
+         BlockParametersNode(10...13)(nil, [], (10...11), (12...13)),
+         nil,
+         (8...9),
+         (14...15)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(17...26)(
+       nil,
+       nil,
+       (17...18),
+       nil,
+       nil,
+       nil,
+       BlockNode(18...26)(
+         [:b],
+         BlockParametersNode(20...24)(
+           ParametersNode(21...23)(
+             [],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(21...23)((22...23), (21...22))
+           ),
+           [],
+           (20...21),
+           (23...24)
+         ),
+         nil,
+         (18...19),
+         (25...26)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(28...44)(
+       nil,
+       nil,
+       (28...29),
+       nil,
+       nil,
+       nil,
+       BlockNode(29...44)(
+         [:baz, :b],
+         BlockParametersNode(31...42)(
+           ParametersNode(32...41)(
+             [],
+             [],
+             [],
+             nil,
+             [],
+             KeywordRestParameterNode(32...37)((32...34), (34...37)),
+             BlockParameterNode(39...41)((40...41), (39...40))
+           ),
+           [],
+           (31...32),
+           (41...42)
+         ),
+         nil,
+         (29...30),
+         (43...44)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(46...58)(
+       nil,
+       nil,
+       (46...47),
+       nil,
+       nil,
+       nil,
+       BlockNode(47...58)(
+         [:*, :b],
+         BlockParametersNode(49...56)(
+           ParametersNode(50...55)(
+             [],
+             [],
+             [],
+             RestParameterNode(50...51)((50...51), nil),
+             [],
+             nil,
+             BlockParameterNode(53...55)((54...55), (53...54))
+           ),
+           [],
+           (49...50),
+           (55...56)
+         ),
+         nil,
+         (47...48),
+         (57...58)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(60...76)(
+       nil,
+       nil,
+       (60...61),
+       nil,
+       nil,
+       nil,
+       BlockNode(61...76)(
+         [:r, :p, :b],
+         BlockParametersNode(63...74)(
+           ParametersNode(64...73)(
+             [],
+             [],
+             [RequiredParameterNode(68...69)(:p)],
+             RestParameterNode(64...66)((64...65), (65...66)),
+             [],
+             nil,
+             BlockParameterNode(71...73)((72...73), (71...72))
+           ),
+           [],
+           (63...64),
+           (73...74)
+         ),
+         nil,
+         (61...62),
+         (75...76)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(78...91)(
+       nil,
+       nil,
+       (78...79),
+       nil,
+       nil,
+       nil,
+       BlockNode(79...91)(
+         [:s, :b],
+         BlockParametersNode(81...89)(
+           ParametersNode(82...88)(
+             [],
+             [],
+             [],
+             RestParameterNode(82...84)((82...83), (83...84)),
+             [],
+             nil,
+             BlockParameterNode(86...88)((87...88), (86...87))
+           ),
+           [],
+           (81...82),
+           (88...89)
+         ),
+         nil,
+         (79...80),
+         (90...91)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(93...102)(
+       nil,
+       nil,
+       (93...94),
+       nil,
+       nil,
+       nil,
+       BlockNode(94...102)(
+         [:s],
+         BlockParametersNode(96...100)(
+           ParametersNode(97...99)(
+             [],
+             [],
+             [],
+             RestParameterNode(97...99)((97...98), (98...99)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (96...97),
+           (99...100)
+         ),
+         nil,
+         (94...95),
+         (101...102)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(104...112)(
+       nil,
+       nil,
+       (104...105),
+       nil,
+       nil,
+       nil,
+       BlockNode(105...112)(
+         [:*],
+         BlockParametersNode(107...110)(
+           ParametersNode(108...109)(
+             [],
+             [],
+             [],
+             RestParameterNode(108...109)((108...109), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (107...108),
+           (109...110)
+         ),
+         nil,
+         (105...106),
+         (111...112)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(114...125)(
+       nil,
+       nil,
+       (114...115),
+       nil,
+       nil,
+       nil,
+       BlockNode(115...125)(
+         [:a],
+         BlockParametersNode(117...123)(
+           nil,
+           [(120...121)],
+           (117...118),
+           (122...123)
+         ),
+         nil,
+         (115...116),
+         (124...125)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(127...136)(
+       nil,
+       nil,
+       (127...128),
+       nil,
+       nil,
+       nil,
+       BlockNode(128...136)(
+         [:a],
+         BlockParametersNode(130...134)(
+           nil,
+           [(132...133)],
+           (130...131),
+           (133...134)
+         ),
+         nil,
+         (128...129),
+         (135...136)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(138...150)(
+       nil,
+       nil,
+       (138...139),
+       nil,
+       nil,
+       nil,
+       BlockNode(139...150)(
+         [:a, :b],
+         BlockParametersNode(141...148)(
+           ParametersNode(142...147)(
+             [RequiredParameterNode(142...143)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(145...147)((146...147), (145...146))
+           ),
+           [],
+           (141...142),
+           (147...148)
+         ),
+         nil,
+         (139...140),
+         (149...150)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(152...167)(
+       nil,
+       nil,
+       (152...153),
+       nil,
+       nil,
+       nil,
+       BlockNode(153...167)(
+         [:a, :*, :b],
+         BlockParametersNode(155...165)(
+           ParametersNode(156...164)(
+             [RequiredParameterNode(156...157)(:a)],
+             [],
+             [],
+             RestParameterNode(159...160)((159...160), nil),
+             [],
+             nil,
+             BlockParameterNode(162...164)((163...164), (162...163))
+           ),
+           [],
+           (155...156),
+           (164...165)
+         ),
+         nil,
+         (153...154),
+         (166...167)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(169...188)(
+       nil,
+       nil,
+       (169...170),
+       nil,
+       nil,
+       nil,
+       BlockNode(170...188)(
+         [:a, :r, :p, :b],
+         BlockParametersNode(172...186)(
+           ParametersNode(173...185)(
+             [RequiredParameterNode(173...174)(:a)],
+             [],
+             [RequiredParameterNode(180...181)(:p)],
+             RestParameterNode(176...178)((176...177), (177...178)),
+             [],
+             nil,
+             BlockParameterNode(183...185)((184...185), (183...184))
+           ),
+           [],
+           (172...173),
+           (185...186)
+         ),
+         nil,
+         (170...171),
+         (187...188)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(190...206)(
+       nil,
+       nil,
+       (190...191),
+       nil,
+       nil,
+       nil,
+       BlockNode(191...206)(
+         [:a, :s, :b],
+         BlockParametersNode(193...204)(
+           ParametersNode(194...203)(
+             [RequiredParameterNode(194...195)(:a)],
+             [],
+             [],
+             RestParameterNode(197...199)((197...198), (198...199)),
+             [],
+             nil,
+             BlockParameterNode(201...203)((202...203), (201...202))
+           ),
+           [],
+           (193...194),
+           (203...204)
+         ),
+         nil,
+         (191...192),
+         (205...206)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(208...220)(
+       nil,
+       nil,
+       (208...209),
+       nil,
+       nil,
+       nil,
+       BlockNode(209...220)(
+         [:a, :s],
+         BlockParametersNode(211...218)(
+           ParametersNode(212...217)(
+             [RequiredParameterNode(212...213)(:a)],
+             [],
+             [],
+             RestParameterNode(215...217)((215...216), (216...217)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (211...212),
+           (217...218)
+         ),
+         nil,
+         (209...210),
+         (219...220)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(222...233)(
+       nil,
+       nil,
+       (222...223),
+       nil,
+       nil,
+       nil,
+       BlockNode(223...233)(
+         [:a, :*],
+         BlockParametersNode(225...231)(
+           ParametersNode(226...230)(
+             [RequiredParameterNode(226...227)(:a)],
+             [],
+             [],
+             RestParameterNode(229...230)((229...230), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (225...226),
+           (230...231)
+         ),
+         nil,
+         (223...224),
+         (232...233)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(235...247)(
+       nil,
+       nil,
+       (235...236),
+       nil,
+       nil,
+       nil,
+       BlockNode(236...247)(
+         [:a, :b],
+         BlockParametersNode(238...245)(
+           ParametersNode(239...244)(
+             [RequiredParameterNode(239...240)(:a),
+              RequiredParameterNode(242...243)(:b)],
+             [],
+             [],
+             RestParameterNode(243...244)((243...244), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (238...239),
+           (244...245)
+         ),
+         nil,
+         (236...237),
+         (246...247)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(249...260)(
+       nil,
+       nil,
+       (249...250),
+       nil,
+       nil,
+       nil,
+       BlockNode(250...260)(
+         [:a, :c],
+         BlockParametersNode(252...258)(
+           ParametersNode(253...257)(
+             [RequiredParameterNode(253...254)(:a),
+              RequiredParameterNode(256...257)(:c)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (252...253),
+           (257...258)
+         ),
+         nil,
+         (250...251),
+         (259...260)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(262...279)(
+       nil,
+       nil,
+       (262...263),
+       nil,
+       nil,
+       nil,
+       BlockNode(263...279)(
+         [:a, :o, :b],
+         BlockParametersNode(265...277)(
+           ParametersNode(266...276)(
+             [RequiredParameterNode(266...267)(:a)],
+             [OptionalParameterNode(269...272)(
+                :o,
+                (269...270),
+                (270...271),
+                IntegerNode(271...272)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(274...276)((275...276), (274...275))
+           ),
+           [],
+           (265...266),
+           (276...277)
+         ),
+         nil,
+         (263...264),
+         (278...279)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(281...305)(
+       nil,
+       nil,
+       (281...282),
+       nil,
+       nil,
+       nil,
+       BlockNode(282...305)(
+         [:a, :o, :r, :p, :b],
+         BlockParametersNode(284...303)(
+           ParametersNode(285...302)(
+             [RequiredParameterNode(285...286)(:a)],
+             [OptionalParameterNode(288...291)(
+                :o,
+                (288...289),
+                (289...290),
+                IntegerNode(290...291)()
+              )],
+             [RequiredParameterNode(297...298)(:p)],
+             RestParameterNode(293...295)((293...294), (294...295)),
+             [],
+             nil,
+             BlockParameterNode(300...302)((301...302), (300...301))
+           ),
+           [],
+           (284...285),
+           (302...303)
+         ),
+         nil,
+         (282...283),
+         (304...305)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(307...334)(
+       nil,
+       nil,
+       (307...308),
+       nil,
+       nil,
+       nil,
+       BlockNode(308...334)(
+         [:a, :o, :o1, :r, :b],
+         BlockParametersNode(310...332)(
+           ParametersNode(311...331)(
+             [RequiredParameterNode(311...312)(:a)],
+             [OptionalParameterNode(314...317)(
+                :o,
+                (314...315),
+                (315...316),
+                IntegerNode(316...317)()
+              ),
+              OptionalParameterNode(319...323)(
+                :o1,
+                (319...321),
+                (321...322),
+                IntegerNode(322...323)()
+              )],
+             [],
+             RestParameterNode(325...327)((325...326), (326...327)),
+             [],
+             nil,
+             BlockParameterNode(329...331)((330...331), (329...330))
+           ),
+           [],
+           (310...311),
+           (331...332)
+         ),
+         nil,
+         (308...309),
+         (333...334)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(336...356)(
+       nil,
+       nil,
+       (336...337),
+       nil,
+       nil,
+       nil,
+       BlockNode(337...356)(
+         [:a, :o, :p, :b],
+         BlockParametersNode(339...354)(
+           ParametersNode(340...353)(
+             [RequiredParameterNode(340...341)(:a)],
+             [OptionalParameterNode(343...346)(
+                :o,
+                (343...344),
+                (344...345),
+                IntegerNode(345...346)()
+              )],
+             [RequiredParameterNode(348...349)(:p)],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(351...353)((352...353), (351...352))
+           ),
+           [],
+           (339...340),
+           (353...354)
+         ),
+         nil,
+         (337...338),
+         (355...356)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(358...367)(
+       nil,
+       nil,
+       (358...359),
+       nil,
+       nil,
+       nil,
+       BlockNode(359...367)(
+         [:a],
+         BlockParametersNode(361...365)(
+           ParametersNode(362...364)(
+             [RequiredParameterNode(362...363)(:a)],
+             [],
+             [],
+             RestParameterNode(363...364)((363...364), nil),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (361...362),
+           (364...365)
+         ),
+         nil,
+         (359...360),
+         (366...367)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(369...377)(
+       nil,
+       nil,
+       (369...370),
+       nil,
+       nil,
+       nil,
+       BlockNode(370...377)(
+         [:a],
+         BlockParametersNode(372...375)(
+           ParametersNode(373...374)(
+             [RequiredParameterNode(373...374)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (372...373),
+           (374...375)
+         ),
+         nil,
+         (370...371),
+         (376...377)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(379...387)(
+       nil,
+       nil,
+       (379...380),
+       nil,
+       nil,
+       nil,
+       BlockNode(380...387)(
+         [:a],
+         BlockParametersNode(382...385)(
+           ParametersNode(383...384)(
+             [RequiredParameterNode(383...384)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (382...383),
+           (384...385)
+         ),
+         nil,
+         (380...381),
+         (386...387)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(389...397)(
+       nil,
+       nil,
+       (389...390),
+       nil,
+       nil,
+       nil,
+       BlockNode(390...397)(
+         [:a],
+         BlockParametersNode(392...395)(
+           ParametersNode(393...394)(
+             [RequiredParameterNode(393...394)(:a)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (392...393),
+           (394...395)
+         ),
+         nil,
+         (390...391),
+         (396...397)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(399...416)(
+       nil,
+       nil,
+       (399...400),
+       nil,
+       nil,
+       nil,
+       BlockNode(400...416)(
+         [:foo, :b],
+         BlockParametersNode(402...414)(
+           ParametersNode(403...413)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(403...409)(
+                (403...407),
+                IntegerNode(408...409)()
+              )],
+             nil,
+             BlockParameterNode(411...413)((412...413), (411...412))
+           ),
+           [],
+           (402...403),
+           (413...414)
+         ),
+         nil,
+         (400...401),
+         (415...416)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(418...450)(
+       nil,
+       nil,
+       (418...419),
+       nil,
+       nil,
+       nil,
+       BlockNode(419...450)(
+         [:foo, :bar, :baz, :b],
+         BlockParametersNode(421...448)(
+           ParametersNode(422...447)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(422...428)(
+                (422...426),
+                IntegerNode(427...428)()
+              ),
+              KeywordParameterNode(430...436)(
+                (430...434),
+                IntegerNode(435...436)()
+              )],
+             KeywordRestParameterNode(438...443)((438...440), (440...443)),
+             BlockParameterNode(445...447)((446...447), (445...446))
+           ),
+           [],
+           (421...422),
+           (447...448)
+         ),
+         nil,
+         (419...420),
+         (449...450)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(452...463)(
+       nil,
+       nil,
+       (452...453),
+       nil,
+       nil,
+       nil,
+       BlockNode(453...463)(
+         [:foo],
+         BlockParametersNode(455...461)(
+           ParametersNode(456...460)(
+             [],
+             [],
+             [],
+             nil,
+             [KeywordParameterNode(456...460)((456...460), nil)],
+             nil,
+             nil
+           ),
+           [],
+           (455...456),
+           (460...461)
+         ),
+         nil,
+         (453...454),
+         (462...463)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(465...479)(
+       nil,
+       nil,
+       (465...466),
+       nil,
+       nil,
+       nil,
+       BlockNode(466...479)(
+         [:o, :b],
+         BlockParametersNode(468...477)(
+           ParametersNode(469...476)(
+             [],
+             [OptionalParameterNode(469...472)(
+                :o,
+                (469...470),
+                (470...471),
+                IntegerNode(471...472)()
+              )],
+             [],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(474...476)((475...476), (474...475))
+           ),
+           [],
+           (468...469),
+           (476...477)
+         ),
+         nil,
+         (466...467),
+         (478...479)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(481...499)(
+       nil,
+       nil,
+       (481...482),
+       nil,
+       nil,
+       nil,
+       BlockNode(482...499)(
+         [:o, :r, :b],
+         BlockParametersNode(484...497)(
+           ParametersNode(485...496)(
+             [],
+             [OptionalParameterNode(485...488)(
+                :o,
+                (485...486),
+                (486...487),
+                IntegerNode(487...488)()
+              )],
+             [],
+             RestParameterNode(490...492)((490...491), (491...492)),
+             [],
+             nil,
+             BlockParameterNode(494...496)((495...496), (494...495))
+           ),
+           [],
+           (484...485),
+           (496...497)
+         ),
+         nil,
+         (482...483),
+         (498...499)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(501...522)(
+       nil,
+       nil,
+       (501...502),
+       nil,
+       nil,
+       nil,
+       BlockNode(502...522)(
+         [:o, :r, :p, :b],
+         BlockParametersNode(504...520)(
+           ParametersNode(505...519)(
+             [],
+             [OptionalParameterNode(505...508)(
+                :o,
+                (505...506),
+                (506...507),
+                IntegerNode(507...508)()
+              )],
+             [RequiredParameterNode(514...515)(:p)],
+             RestParameterNode(510...512)((510...511), (511...512)),
+             [],
+             nil,
+             BlockParameterNode(517...519)((518...519), (517...518))
+           ),
+           [],
+           (504...505),
+           (519...520)
+         ),
+         nil,
+         (502...503),
+         (521...522)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(524...541)(
+       nil,
+       nil,
+       (524...525),
+       nil,
+       nil,
+       nil,
+       BlockNode(525...541)(
+         [:o, :p, :b],
+         BlockParametersNode(527...539)(
+           ParametersNode(528...538)(
+             [],
+             [OptionalParameterNode(528...531)(
+                :o,
+                (528...529),
+                (529...530),
+                IntegerNode(530...531)()
+              )],
+             [RequiredParameterNode(533...534)(:p)],
+             nil,
+             [],
+             nil,
+             BlockParameterNode(536...538)((537...538), (536...537))
+           ),
+           [],
+           (527...528),
+           (538...539)
+         ),
+         nil,
+         (525...526),
+         (540...541)
+       ),
+       0,
+       "f"
+     ),
+     CallNode(543...550)(
+       nil,
+       nil,
+       (543...544),
+       nil,
+       nil,
+       nil,
+       BlockNode(544...550)(
+         [],
+         BlockParametersNode(546...548)(nil, [], (546...547), (547...548)),
+         nil,
+         (544...545),
+         (549...550)
+       ),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/break.txt b/test/yarp/snapshots/whitequark/break.txt
new file mode 100644
index 0000000000..df24567c4d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/break.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [BreakNode(0...5)(nil, (0...5)),
+     BreakNode(7...16)(
+       ArgumentsNode(13...16)(
+         [CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (7...12)
+     ),
+     BreakNode(18...25)(
+       ArgumentsNode(23...25)(
+         [ParenthesesNode(23...25)(nil, (23...24), (24...25))]
+       ),
+       (18...23)
+     ),
+     BreakNode(27...37)(
+       ArgumentsNode(32...37)(
+         [ParenthesesNode(32...37)(
+            StatementsNode(33...36)(
+              [CallNode(33...36)(
+                 nil,
+                 nil,
+                 (33...36),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            (32...33),
+            (36...37)
+          )]
+       ),
+       (27...32)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/break_block.txt b/test/yarp/snapshots/whitequark/break_block.txt
new file mode 100644
index 0000000000..41e083f25f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/break_block.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [BreakNode(0...20)(
+       ArgumentsNode(6...20)(
+         [CallNode(6...20)(
+            nil,
+            nil,
+            (6...9),
+            nil,
+            ArgumentsNode(10...13)(
+              [CallNode(10...13)(
+                 nil,
+                 nil,
+                 (10...13),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            nil,
+            BlockNode(14...20)([], nil, nil, (14...16), (17...20)),
+            0,
+            "fun"
+          )]
+       ),
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_435.txt b/test/yarp/snapshots/whitequark/bug_435.txt
new file mode 100644
index 0000000000..ed5a985e3a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_435.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedStringNode(0...14)(
+       (0...1),
+       [EmbeddedStatementsNode(1...13)(
+          (1...3),
+          StatementsNode(3...12)(
+            [LambdaNode(3...12)(
+               [:foo],
+               (3...5),
+               BlockParametersNode(6...9)(
+                 ParametersNode(6...9)(
+                   [RequiredParameterNode(6...9)(:foo)],
+                   [],
+                   [],
+                   nil,
+                   [],
+                   nil,
+                   nil
+                 ),
+                 [],
+                 nil,
+                 nil
+               ),
+               nil
+             )]
+          ),
+          (12...13)
+        )],
+       (13...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_447.txt b/test/yarp/snapshots/whitequark/bug_447.txt
new file mode 100644
index 0000000000..3903748cec
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_447.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...4)([ArrayNode(2...4)([], (2...3), (3...4))]),
+       nil,
+       BlockNode(5...11)([], nil, nil, (5...7), (8...11)),
+       0,
+       "m"
+     ),
+     CallNode(13...27)(
+       nil,
+       nil,
+       (13...14),
+       nil,
+       ArgumentsNode(15...20)(
+         [ArrayNode(15...17)([], (15...16), (16...17)), IntegerNode(19...20)()]
+       ),
+       nil,
+       BlockNode(21...27)([], nil, nil, (21...23), (24...27)),
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_452.txt b/test/yarp/snapshots/whitequark/bug_452.txt
new file mode 100644
index 0000000000..78fc5f28a2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_452.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [CallNode(0...21)(
+       nil,
+       nil,
+       (0...2),
+       nil,
+       ArgumentsNode(3...21)(
+         [CallNode(3...21)(
+            ParenthesesNode(3...10)(
+              StatementsNode(4...9)([IntegerNode(4...9)()]),
+              (3...4),
+              (9...10)
+            ),
+            (10...11),
+            (11...19),
+            (19...20),
+            nil,
+            (20...21),
+            nil,
+            0,
+            "toString"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "td"
+     ),
+     CallNode(23...37)(
+       CallNode(23...25)(nil, nil, (23...25), nil, nil, nil, nil, 0, "td"),
+       (25...26),
+       (26...29),
+       nil,
+       nil,
+       nil,
+       BlockNode(30...37)([], nil, nil, (30...32), (34...37)),
+       0,
+       "num"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_466.txt b/test/yarp/snapshots/whitequark/bug_466.txt
new file mode 100644
index 0000000000..3b153e4995
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_466.txt
@@ -0,0 +1,54 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [CallNode(0...27)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...19)(
+         [InterpolatedStringNode(4...19)(
+            (4...5),
+            [EmbeddedStatementsNode(5...18)(
+               (5...7),
+               StatementsNode(7...17)(
+                 [CallNode(7...17)(
+                    ParenthesesNode(7...12)(
+                      StatementsNode(8...11)(
+                        [CallNode(8...11)(
+                           IntegerNode(8...9)(),
+                           nil,
+                           (9...10),
+                           nil,
+                           ArgumentsNode(10...11)([IntegerNode(10...11)()]),
+                           nil,
+                           nil,
+                           0,
+                           "+"
+                         )]
+                      ),
+                      (7...8),
+                      (11...12)
+                    ),
+                    (12...13),
+                    (13...17),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "to_i"
+                  )]
+               ),
+               (17...18)
+             )],
+            (18...19)
+          )]
+       ),
+       nil,
+       BlockNode(20...27)([], nil, nil, (20...22), (24...27)),
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_473.txt b/test/yarp/snapshots/whitequark/bug_473.txt
new file mode 100644
index 0000000000..a9978db50d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_473.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...9)(
+         [InterpolatedStringNode(2...9)(
+            (2...3),
+            [EmbeddedStatementsNode(3...8)(
+               (3...5),
+               StatementsNode(5...7)([ArrayNode(5...7)([], (5...6), (6...7))]),
+               (7...8)
+             )],
+            (8...9)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_480.txt b/test/yarp/snapshots/whitequark/bug_480.txt
new file mode 100644
index 0000000000..8457cefa86
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_480.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...12)(
+         [InterpolatedStringNode(2...12)(
+            (2...3),
+            [EmbeddedStatementsNode(3...6)((3...5), nil, (5...6)),
+             EmbeddedStatementsNode(6...11)(
+               (6...8),
+               StatementsNode(8...10)(
+                 [ParenthesesNode(8...10)(nil, (8...9), (9...10))]
+               ),
+               (10...11)
+             )],
+            (11...12)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_481.txt b/test/yarp/snapshots/whitequark/bug_481.txt
new file mode 100644
index 0000000000..1bd74e1235
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_481.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...14)(
+         [DefNode(2...14)(
+            (6...7),
+            nil,
+            nil,
+            nil,
+            [],
+            (2...5),
+            nil,
+            (7...8),
+            (8...9),
+            nil,
+            (11...14)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "m"
+     ),
+     CallNode(16...28)(
+       IntegerNode(16...17)(),
+       (17...18),
+       (18...21),
+       nil,
+       nil,
+       nil,
+       BlockNode(22...28)([], nil, nil, (22...24), (25...28)),
+       0,
+       "tap"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_ascii_8bit_in_literal.txt b/test/yarp/snapshots/whitequark/bug_ascii_8bit_in_literal.txt
new file mode 100644
index 0000000000..40251879fc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_ascii_8bit_in_literal.txt
@@ -0,0 +1,6 @@
+ProgramNode(24...90)(
+  [],
+  StatementsNode(24...90)(
+    [StringNode(24...90)((24...25), (25...89), (89...90), "проверка")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_cmd_string_lookahead.txt b/test/yarp/snapshots/whitequark/bug_cmd_string_lookahead.txt
new file mode 100644
index 0000000000..0004e1a758
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_cmd_string_lookahead.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       ArgumentsNode(5...10)(
+         [StringNode(5...10)((5...6), (6...9), (9...10), "foo")]
+       ),
+       nil,
+       BlockNode(11...17)([], nil, nil, (11...13), (14...17)),
+       0,
+       "desc"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_cmdarg.txt b/test/yarp/snapshots/whitequark/bug_cmdarg.txt
new file mode 100644
index 0000000000..bfce248782
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_cmdarg.txt
@@ -0,0 +1,83 @@
+ProgramNode(0...56)(
+  [],
+  StatementsNode(0...56)(
+    [CallNode(0...15)(
+       nil,
+       nil,
+       (0...6),
+       nil,
+       ArgumentsNode(7...15)(
+         [KeywordHashNode(7...15)(
+            [AssocNode(7...15)(
+               SymbolNode(7...10)(nil, (7...9), (9...10), "do"),
+               TrueNode(11...15)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "assert"
+     ),
+     CallNode(17...28)(
+       nil,
+       nil,
+       (17...23),
+       nil,
+       ArgumentsNode(24...28)(
+         [CallNode(24...28)(
+            nil,
+            nil,
+            (24...28),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "dogs"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "assert"
+     ),
+     CallNode(30...56)(
+       nil,
+       nil,
+       (30...31),
+       nil,
+       ArgumentsNode(32...56)(
+         [KeywordHashNode(32...56)(
+            [AssocNode(32...56)(
+               SymbolNode(32...34)(nil, (32...33), (33...34), "x"),
+               LambdaNode(35...56)(
+                 [],
+                 (35...37),
+                 nil,
+                 StatementsNode(41...52)(
+                   [CallNode(41...52)(
+                      nil,
+                      nil,
+                      (41...45),
+                      nil,
+                      nil,
+                      nil,
+                      BlockNode(46...52)([], nil, nil, (46...48), (49...52)),
+                      0,
+                      "meth"
+                    )]
+                 )
+               ),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_def_no_paren_eql_begin.txt b/test/yarp/snapshots/whitequark/bug_def_no_paren_eql_begin.txt
new file mode 100644
index 0000000000..12efa14109
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_def_no_paren_eql_begin.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [DefNode(0...23)(
+       (4...7),
+       nil,
+       nil,
+       nil,
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_do_block_in_call_args.txt b/test/yarp/snapshots/whitequark/bug_do_block_in_call_args.txt
new file mode 100644
index 0000000000..555819dfbd
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_do_block_in_call_args.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [CallNode(0...33)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...33)(
+         [DefNode(4...33)(
+            (8...11),
+            nil,
+            nil,
+            StatementsNode(13...29)(
+              [CallNode(13...29)(
+                 SelfNode(13...17)(),
+                 (17...18),
+                 (18...22),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(23...29)([], nil, nil, (23...25), (26...29)),
+                 0,
+                 "each"
+               )]
+            ),
+            [],
+            (4...7),
+            nil,
+            nil,
+            nil,
+            nil,
+            (30...33)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "bar"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_do_block_in_cmdarg.txt b/test/yarp/snapshots/whitequark/bug_do_block_in_cmdarg.txt
new file mode 100644
index 0000000000..81fa1d3609
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_do_block_in_cmdarg.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...17)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...17)(
+         [ParenthesesNode(4...17)(
+            StatementsNode(5...16)(
+              [CallNode(5...16)(
+                 nil,
+                 nil,
+                 (5...9),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(10...16)([], nil, nil, (10...12), (13...16)),
+                 0,
+                 "proc"
+               )]
+            ),
+            (4...5),
+            (16...17)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "tap"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_do_block_in_hash_brace.txt b/test/yarp/snapshots/whitequark/bug_do_block_in_hash_brace.txt
new file mode 100644
index 0000000000..bce92ea25b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_do_block_in_hash_brace.txt
@@ -0,0 +1,249 @@
+ProgramNode(0...225)(
+  [],
+  StatementsNode(0...225)(
+    [CallNode(0...42)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...42)(
+         [SymbolNode(2...6)((2...3), (3...6), nil, "foo"),
+          HashNode(8...42)(
+            (8...9),
+            [AssocNode(9...25)(
+               SymbolNode(9...13)((9...10), (10...11), (11...13), "a"),
+               CallNode(14...25)(
+                 nil,
+                 nil,
+                 (14...18),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(19...25)([], nil, nil, (19...21), (22...25)),
+                 0,
+                 "proc"
+               ),
+               nil
+             ),
+             AssocNode(27...41)(
+               SymbolNode(27...29)(nil, (27...28), (28...29), "b"),
+               CallNode(30...41)(
+                 nil,
+                 nil,
+                 (30...34),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(35...41)([], nil, nil, (35...37), (38...41)),
+                 0,
+                 "proc"
+               ),
+               nil
+             )],
+            (41...42)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(44...84)(
+       nil,
+       nil,
+       (44...45),
+       nil,
+       ArgumentsNode(46...84)(
+         [SymbolNode(46...50)((46...47), (47...50), nil, "foo"),
+          HashNode(52...84)(
+            (52...53),
+            [AssocSplatNode(53...67)(
+               CallNode(56...67)(
+                 nil,
+                 nil,
+                 (56...60),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(61...67)([], nil, nil, (61...63), (64...67)),
+                 0,
+                 "proc"
+               ),
+               (53...55)
+             ),
+             AssocNode(69...83)(
+               SymbolNode(69...71)(nil, (69...70), (70...71), "b"),
+               CallNode(72...83)(
+                 nil,
+                 nil,
+                 (72...76),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(77...83)([], nil, nil, (77...79), (80...83)),
+                 0,
+                 "proc"
+               ),
+               nil
+             )],
+            (83...84)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(86...129)(
+       nil,
+       nil,
+       (86...87),
+       nil,
+       ArgumentsNode(88...129)(
+         [SymbolNode(88...92)((88...89), (89...92), nil, "foo"),
+          HashNode(94...129)(
+            (94...95),
+            [AssocNode(95...112)(
+               SymbolNode(95...97)((95...96), (96...97), nil, "a"),
+               CallNode(101...112)(
+                 nil,
+                 nil,
+                 (101...105),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(106...112)([], nil, nil, (106...108), (109...112)),
+                 0,
+                 "proc"
+               ),
+               (98...100)
+             ),
+             AssocNode(114...128)(
+               SymbolNode(114...116)(nil, (114...115), (115...116), "b"),
+               CallNode(117...128)(
+                 nil,
+                 nil,
+                 (117...121),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(122...128)([], nil, nil, (122...124), (125...128)),
+                 0,
+                 "proc"
+               ),
+               nil
+             )],
+            (128...129)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(131...171)(
+       nil,
+       nil,
+       (131...132),
+       nil,
+       ArgumentsNode(133...171)(
+         [SymbolNode(133...137)((133...134), (134...137), nil, "foo"),
+          HashNode(139...171)(
+            (139...140),
+            [AssocNode(140...154)(
+               SymbolNode(140...142)(nil, (140...141), (141...142), "a"),
+               CallNode(143...154)(
+                 nil,
+                 nil,
+                 (143...147),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(148...154)([], nil, nil, (148...150), (151...154)),
+                 0,
+                 "proc"
+               ),
+               nil
+             ),
+             AssocNode(156...170)(
+               SymbolNode(156...158)(nil, (156...157), (157...158), "b"),
+               CallNode(159...170)(
+                 nil,
+                 nil,
+                 (159...163),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(164...170)([], nil, nil, (164...166), (167...170)),
+                 0,
+                 "proc"
+               ),
+               nil
+             )],
+            (170...171)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(173...225)(
+       nil,
+       nil,
+       (173...174),
+       nil,
+       ArgumentsNode(175...225)(
+         [SymbolNode(175...179)((175...176), (176...179), nil, "foo"),
+          HashNode(181...225)(
+            (181...182),
+            [AssocNode(182...208)(
+               CallNode(182...193)(
+                 nil,
+                 nil,
+                 (182...186),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(187...193)([], nil, nil, (187...189), (190...193)),
+                 0,
+                 "proc"
+               ),
+               CallNode(197...208)(
+                 nil,
+                 nil,
+                 (197...201),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(202...208)([], nil, nil, (202...204), (205...208)),
+                 0,
+                 "proc"
+               ),
+               (194...196)
+             ),
+             AssocNode(210...224)(
+               SymbolNode(210...212)(nil, (210...211), (211...212), "b"),
+               CallNode(213...224)(
+                 nil,
+                 nil,
+                 (213...217),
+                 nil,
+                 nil,
+                 nil,
+                 BlockNode(218...224)([], nil, nil, (218...220), (221...224)),
+                 0,
+                 "proc"
+               ),
+               nil
+             )],
+            (224...225)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_heredoc_do.txt b/test/yarp/snapshots/whitequark/bug_heredoc_do.txt
new file mode 100644
index 0000000000..b3ca8ffab1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_heredoc_do.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [CallNode(0...23)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...20)(
+         [InterpolatedStringNode(2...20)((2...10), [], (14...20))]
+       ),
+       nil,
+       BlockNode(11...23)([], nil, nil, (11...13), (20...23)),
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_interp_single.txt b/test/yarp/snapshots/whitequark/bug_interp_single.txt
new file mode 100644
index 0000000000..abfa2dfe89
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_interp_single.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [InterpolatedStringNode(0...6)(
+       (0...1),
+       [EmbeddedStatementsNode(1...5)(
+          (1...3),
+          StatementsNode(3...4)([IntegerNode(3...4)()]),
+          (4...5)
+        )],
+       (5...6)
+     ),
+     ArrayNode(8...16)(
+       [InterpolatedStringNode(0...15)(
+          nil,
+          [EmbeddedStatementsNode(11...15)(
+             (11...13),
+             StatementsNode(13...14)([IntegerNode(13...14)()]),
+             (14...15)
+           )],
+          nil
+        )],
+       (8...11),
+       (15...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_lambda_leakage.txt b/test/yarp/snapshots/whitequark/bug_lambda_leakage.txt
new file mode 100644
index 0000000000..4fac00cf34
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_lambda_leakage.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [LambdaNode(0...12)(
+       [:scope],
+       (0...2),
+       BlockParametersNode(2...9)(
+         ParametersNode(3...8)(
+           [RequiredParameterNode(3...8)(:scope)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (2...3),
+         (8...9)
+       ),
+       nil
+     ),
+     CallNode(14...19)(nil, nil, (14...19), nil, nil, nil, nil, 0, "scope")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_regex_verification.txt b/test/yarp/snapshots/whitequark/bug_regex_verification.txt
new file mode 100644
index 0000000000..e1fc0ec0e6
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_regex_verification.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [RegularExpressionNode(0...5)((0...1), (1...3), (3...5), "#)", 4)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_rescue_empty_else.txt b/test/yarp/snapshots/whitequark/bug_rescue_empty_else.txt
new file mode 100644
index 0000000000..83ea8818ee
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_rescue_empty_else.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...34)(
+  [],
+  StatementsNode(0...34)(
+    [BeginNode(0...34)(
+       (0...5),
+       nil,
+       RescueNode(7...23)(
+         (7...13),
+         [ConstantReadNode(14...23)()],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       ElseNode(25...34)((25...29), nil, (31...34)),
+       nil,
+       (31...34)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/bug_while_not_parens_do.txt b/test/yarp/snapshots/whitequark/bug_while_not_parens_do.txt
new file mode 100644
index 0000000000..26c198608c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/bug_while_not_parens_do.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [WhileNode(0...23)(
+       (0...5),
+       CallNode(6...16)(
+         ParenthesesNode(10...16)(
+           StatementsNode(11...15)([TrueNode(11...15)()]),
+           (10...11),
+           (15...16)
+         ),
+         nil,
+         (6...9),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "!"
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/case_cond.txt b/test/yarp/snapshots/whitequark/case_cond.txt
new file mode 100644
index 0000000000..4fbc69e3ba
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/case_cond.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CaseNode(0...26)(
+       nil,
+       [WhenNode(6...21)(
+          (6...10),
+          [CallNode(11...14)(
+             nil,
+             nil,
+             (11...14),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "foo"
+           )],
+          StatementsNode(16...21)(
+            [StringNode(16...21)((16...17), (17...20), (20...21), "foo")]
+          )
+        )],
+       nil,
+       (0...4),
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/case_cond_else.txt b/test/yarp/snapshots/whitequark/case_cond_else.txt
new file mode 100644
index 0000000000..c4a035f178
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/case_cond_else.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...38)(
+  [],
+  StatementsNode(0...38)(
+    [CaseNode(0...38)(
+       nil,
+       [WhenNode(6...21)(
+          (6...10),
+          [CallNode(11...14)(
+             nil,
+             nil,
+             (11...14),
+             nil,
+             nil,
+             nil,
+             nil,
+             0,
+             "foo"
+           )],
+          StatementsNode(16...21)(
+            [StringNode(16...21)((16...17), (17...20), (20...21), "foo")]
+          )
+        )],
+       ElseNode(23...38)(
+         (23...27),
+         StatementsNode(28...33)(
+           [StringNode(28...33)((28...29), (29...32), (32...33), "bar")]
+         ),
+         (35...38)
+       ),
+       (0...4),
+       (35...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/case_expr.txt b/test/yarp/snapshots/whitequark/case_expr.txt
new file mode 100644
index 0000000000..22763ee9fe
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/case_expr.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [CaseNode(0...30)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [WhenNode(10...25)(
+          (10...14),
+          [StringNode(15...20)((15...16), (16...19), (19...20), "bar")],
+          StatementsNode(22...25)(
+            [CallNode(22...25)(
+               nil,
+               nil,
+               (22...25),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          )
+        )],
+       nil,
+       (0...4),
+       (27...30)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/case_expr_else.txt b/test/yarp/snapshots/whitequark/case_expr_else.txt
new file mode 100644
index 0000000000..9782ba04cb
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/case_expr_else.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [CaseNode(0...40)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [WhenNode(10...25)(
+          (10...14),
+          [StringNode(15...20)((15...16), (16...19), (19...20), "bar")],
+          StatementsNode(22...25)(
+            [CallNode(22...25)(
+               nil,
+               nil,
+               (22...25),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          )
+        )],
+       ElseNode(27...40)(
+         (27...31),
+         StatementsNode(32...35)(
+           [CallNode(32...35)(
+              nil,
+              nil,
+              (32...35),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (37...40)
+       ),
+       (0...4),
+       (37...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/casgn_scoped.txt b/test/yarp/snapshots/whitequark/casgn_scoped.txt
new file mode 100644
index 0000000000..4f3dbf682e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/casgn_scoped.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [ConstantPathWriteNode(0...13)(
+       ConstantPathNode(0...8)(
+         ConstantReadNode(0...3)(),
+         ConstantReadNode(5...8)(),
+         (3...5)
+       ),
+       (9...10),
+       IntegerNode(11...13)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/casgn_toplevel.txt b/test/yarp/snapshots/whitequark/casgn_toplevel.txt
new file mode 100644
index 0000000000..50d683b366
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/casgn_toplevel.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [ConstantPathWriteNode(0...10)(
+       ConstantPathNode(0...5)(nil, ConstantReadNode(2...5)(), (0...2)),
+       (6...7),
+       IntegerNode(8...10)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/casgn_unscoped.txt b/test/yarp/snapshots/whitequark/casgn_unscoped.txt
new file mode 100644
index 0000000000..3687e38891
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/casgn_unscoped.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [ConstantPathWriteNode(0...8)(
+       ConstantReadNode(0...3)(),
+       (4...5),
+       IntegerNode(6...8)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/character.txt b/test/yarp/snapshots/whitequark/character.txt
new file mode 100644
index 0000000000..7865df42fa
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/character.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...2)(
+  [],
+  StatementsNode(0...2)([StringNode(0...2)((0...1), (1...2), nil, "a")])
+)
diff --git a/test/yarp/snapshots/whitequark/class.txt b/test/yarp/snapshots/whitequark/class.txt
new file mode 100644
index 0000000000..0061b34a8a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/class.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [ClassNode(0...13)(
+       [],
+       (0...5),
+       ConstantReadNode(6...9)(),
+       nil,
+       nil,
+       nil,
+       (10...13)
+     ),
+     ClassNode(15...29)(
+       [],
+       (15...20),
+       ConstantReadNode(21...24)(),
+       nil,
+       nil,
+       nil,
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/class_definition_in_while_cond.txt b/test/yarp/snapshots/whitequark/class_definition_in_while_cond.txt
new file mode 100644
index 0000000000..95b3caf5c7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/class_definition_in_while_cond.txt
@@ -0,0 +1,115 @@
+ProgramNode(0...197)(
+  [],
+  StatementsNode(0...197)(
+    [WhileNode(0...52)(
+       (0...5),
+       SingletonClassNode(6...40)(
+         [:a],
+         (6...11),
+         (12...14),
+         SelfNode(15...19)(),
+         StatementsNode(21...35)(
+           [LocalVariableWriteNode(21...35)(
+              :a,
+              0,
+              CallNode(25...35)(
+                nil,
+                nil,
+                (25...28),
+                nil,
+                nil,
+                nil,
+                BlockNode(29...35)([], nil, nil, (29...31), (32...35)),
+                0,
+                "tap"
+              ),
+              (21...22),
+              (23...24)
+            )]
+         ),
+         (37...40)
+       ),
+       StatementsNode(42...47)([BreakNode(42...47)(nil, (42...47))])
+     ),
+     WhileNode(54...102)(
+       (54...59),
+       SingletonClassNode(60...90)(
+         [],
+         (60...65),
+         (66...68),
+         SelfNode(69...73)(),
+         StatementsNode(75...85)(
+           [CallNode(75...85)(
+              nil,
+              nil,
+              (75...78),
+              nil,
+              nil,
+              nil,
+              BlockNode(79...85)([], nil, nil, (79...81), (82...85)),
+              0,
+              "tap"
+            )]
+         ),
+         (87...90)
+       ),
+       StatementsNode(92...97)([BreakNode(92...97)(nil, (92...97))])
+     ),
+     WhileNode(104...151)(
+       (104...109),
+       ClassNode(110...139)(
+         [:a],
+         (110...115),
+         ConstantReadNode(116...119)(),
+         nil,
+         nil,
+         StatementsNode(120...134)(
+           [LocalVariableWriteNode(120...134)(
+              :a,
+              0,
+              CallNode(124...134)(
+                nil,
+                nil,
+                (124...127),
+                nil,
+                nil,
+                nil,
+                BlockNode(128...134)([], nil, nil, (128...130), (131...134)),
+                0,
+                "tap"
+              ),
+              (120...121),
+              (122...123)
+            )]
+         ),
+         (136...139)
+       ),
+       StatementsNode(141...146)([BreakNode(141...146)(nil, (141...146))])
+     ),
+     WhileNode(153...197)(
+       (153...158),
+       ClassNode(159...185)(
+         [],
+         (159...164),
+         ConstantReadNode(165...168)(),
+         nil,
+         nil,
+         StatementsNode(170...180)(
+           [CallNode(170...180)(
+              nil,
+              nil,
+              (170...173),
+              nil,
+              nil,
+              nil,
+              BlockNode(174...180)([], nil, nil, (174...176), (177...180)),
+              0,
+              "tap"
+            )]
+         ),
+         (182...185)
+       ),
+       StatementsNode(187...192)([BreakNode(187...192)(nil, (187...192))])
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/class_super.txt b/test/yarp/snapshots/whitequark/class_super.txt
new file mode 100644
index 0000000000..aa2845a13e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/class_super.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [ClassNode(0...20)(
+       [],
+       (0...5),
+       ConstantReadNode(6...9)(),
+       (10...11),
+       ConstantReadNode(12...15)(),
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/class_super_label.txt b/test/yarp/snapshots/whitequark/class_super_label.txt
new file mode 100644
index 0000000000..ae6759c1e4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/class_super_label.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [ClassNode(0...20)(
+       [],
+       (0...5),
+       ConstantReadNode(6...9)(),
+       (10...11),
+       CallNode(12...15)(
+         nil,
+         nil,
+         (12...13),
+         nil,
+         ArgumentsNode(13...15)(
+           [SymbolNode(13...15)((13...14), (14...15), nil, "b")]
+         ),
+         nil,
+         nil,
+         0,
+         "a"
+       ),
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/comments_before_leading_dot__27.txt b/test/yarp/snapshots/whitequark/comments_before_leading_dot__27.txt
new file mode 100644
index 0000000000..08dc7c2f5c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/comments_before_leading_dot__27.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...55)(
+  [],
+  StatementsNode(0...55)(
+    [CallNode(0...13)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (8...10),
+       (10...13),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "foo"
+     ),
+     CallNode(16...28)(
+       CallNode(16...17)(nil, nil, (16...17), nil, nil, nil, nil, 0, "a"),
+       (24...25),
+       (25...28),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(31...42)(
+       CallNode(31...32)(nil, nil, (31...32), nil, nil, nil, nil, 0, "a"),
+       (37...39),
+       (39...42),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "foo"
+     ),
+     CallNode(45...55)(
+       CallNode(45...46)(nil, nil, (45...46), nil, nil, nil, nil, 0, "a"),
+       (51...52),
+       (52...55),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/complex.txt b/test/yarp/snapshots/whitequark/complex.txt
new file mode 100644
index 0000000000..f8273f3806
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/complex.txt
@@ -0,0 +1,9 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [ImaginaryNode(0...5)(FloatNode(0...4)()),
+     ImaginaryNode(7...13)(RationalNode(7...12)(FloatNode(7...11)())),
+     ImaginaryNode(15...18)(IntegerNode(15...17)()),
+     ImaginaryNode(20...24)(RationalNode(20...23)(IntegerNode(20...22)()))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/cond_begin.txt b/test/yarp/snapshots/whitequark/cond_begin.txt
new file mode 100644
index 0000000000..0d378e24c9
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cond_begin.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [IfNode(0...18)(
+       (0...2),
+       ParenthesesNode(3...8)(
+         StatementsNode(4...7)(
+           [CallNode(4...7)(nil, nil, (4...7), nil, nil, nil, nil, 0, "bar")]
+         ),
+         (3...4),
+         (7...8)
+       ),
+       StatementsNode(10...13)(
+         [CallNode(10...13)(nil, nil, (10...13), nil, nil, nil, nil, 0, "foo")]
+       ),
+       nil,
+       (15...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/cond_begin_masgn.txt b/test/yarp/snapshots/whitequark/cond_begin_masgn.txt
new file mode 100644
index 0000000000..17a0cd4141
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cond_begin_masgn.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...25)(
+  [:a, :b],
+  StatementsNode(0...25)(
+    [IfNode(0...25)(
+       (0...2),
+       ParenthesesNode(3...20)(
+         StatementsNode(4...19)(
+           [CallNode(4...7)(nil, nil, (4...7), nil, nil, nil, nil, 0, "bar"),
+            MultiWriteNode(9...19)(
+              [LocalVariableWriteNode(9...10)(:a, 0, nil, (9...10), nil),
+               LocalVariableWriteNode(12...13)(:b, 0, nil, (12...13), nil)],
+              (14...15),
+              CallNode(16...19)(
+                nil,
+                nil,
+                (16...19),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "foo"
+              ),
+              nil,
+              nil
+            )]
+         ),
+         (3...4),
+         (19...20)
+       ),
+       nil,
+       nil,
+       (22...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/cond_eflipflop.txt b/test/yarp/snapshots/whitequark/cond_eflipflop.txt
new file mode 100644
index 0000000000..6e1e6718d5
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cond_eflipflop.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CallNode(0...12)(
+       ParenthesesNode(1...12)(
+         StatementsNode(2...11)(
+           [RangeNode(2...11)(
+              CallNode(2...5)(nil, nil, (2...5), nil, nil, nil, nil, 0, "foo"),
+              CallNode(8...11)(
+                nil,
+                nil,
+                (8...11),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (5...8),
+              1
+            )]
+         ),
+         (1...2),
+         (11...12)
+       ),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     IfNode(14...31)(
+       (14...16),
+       RangeNode(17...26)(
+         CallNode(17...20)(nil, nil, (17...20), nil, nil, nil, nil, 0, "foo"),
+         CallNode(23...26)(nil, nil, (23...26), nil, nil, nil, nil, 0, "bar"),
+         (20...23),
+         1
+       ),
+       nil,
+       nil,
+       (28...31)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/cond_iflipflop.txt b/test/yarp/snapshots/whitequark/cond_iflipflop.txt
new file mode 100644
index 0000000000..e45eec8922
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cond_iflipflop.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [CallNode(0...11)(
+       ParenthesesNode(1...11)(
+         StatementsNode(2...10)(
+           [RangeNode(2...10)(
+              CallNode(2...5)(nil, nil, (2...5), nil, nil, nil, nil, 0, "foo"),
+              CallNode(7...10)(
+                nil,
+                nil,
+                (7...10),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (5...7),
+              0
+            )]
+         ),
+         (1...2),
+         (10...11)
+       ),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     IfNode(13...29)(
+       (13...15),
+       RangeNode(16...24)(
+         CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "foo"),
+         CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "bar"),
+         (19...21),
+         0
+       ),
+       nil,
+       nil,
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/cond_match_current_line.txt b/test/yarp/snapshots/whitequark/cond_match_current_line.txt
new file mode 100644
index 0000000000..02bceef3d7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cond_match_current_line.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [CallNode(0...6)(
+       RegularExpressionNode(1...6)((1...2), (2...5), (5...6), "wat", 0),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     IfNode(8...21)(
+       (8...10),
+       RegularExpressionNode(11...16)(
+         (11...12),
+         (12...15),
+         (15...16),
+         "wat",
+         0
+       ),
+       nil,
+       nil,
+       (18...21)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/const_op_asgn.txt b/test/yarp/snapshots/whitequark/const_op_asgn.txt
new file mode 100644
index 0000000000..ef5e755c8e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/const_op_asgn.txt
@@ -0,0 +1,73 @@
+ProgramNode(0...77)(
+  [],
+  StatementsNode(0...77)(
+    [ConstantPathOperatorWriteNode(0...8)(
+       ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+       (4...6),
+       IntegerNode(7...8)(),
+       :+
+     ),
+     ConstantOperatorWriteNode(10...16)(
+       (10...11),
+       (12...14),
+       IntegerNode(15...16)(),
+       :+
+     ),
+     ConstantPathOperatorWriteNode(18...27)(
+       ConstantPathNode(18...22)(
+         ConstantReadNode(18...19)(),
+         ConstantReadNode(21...22)(),
+         (19...21)
+       ),
+       (23...25),
+       IntegerNode(26...27)(),
+       :+
+     ),
+     DefNode(29...50)(
+       (33...34),
+       nil,
+       nil,
+       StatementsNode(36...45)(
+         [ConstantPathOperatorOrWriteNode(36...45)(
+            ConstantPathNode(36...39)(
+              nil,
+              ConstantReadNode(38...39)(),
+              (36...38)
+            ),
+            (40...43),
+            IntegerNode(44...45)()
+          )]
+       ),
+       [],
+       (29...32),
+       nil,
+       nil,
+       nil,
+       nil,
+       (47...50)
+     ),
+     DefNode(52...77)(
+       (56...57),
+       nil,
+       nil,
+       StatementsNode(59...72)(
+         [ConstantPathOperatorOrWriteNode(59...72)(
+            ConstantPathNode(59...66)(
+              SelfNode(59...63)(),
+              ConstantReadNode(65...66)(),
+              (63...65)
+            ),
+            (67...70),
+            IntegerNode(71...72)()
+          )]
+       ),
+       [],
+       (52...55),
+       nil,
+       nil,
+       nil,
+       nil,
+       (74...77)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/const_scoped.txt b/test/yarp/snapshots/whitequark/const_scoped.txt
new file mode 100644
index 0000000000..8aa53922cd
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/const_scoped.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [ConstantPathNode(0...8)(
+       ConstantReadNode(0...3)(),
+       ConstantReadNode(5...8)(),
+       (3...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/const_toplevel.txt b/test/yarp/snapshots/whitequark/const_toplevel.txt
new file mode 100644
index 0000000000..248b407e67
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/const_toplevel.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [ConstantPathNode(0...5)(nil, ConstantReadNode(2...5)(), (0...2))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/const_unscoped.txt b/test/yarp/snapshots/whitequark/const_unscoped.txt
new file mode 100644
index 0000000000..8b8198ef49
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/const_unscoped.txt
@@ -0,0 +1 @@
+ProgramNode(0...3)([], StatementsNode(0...3)([ConstantReadNode(0...3)()]))
diff --git a/test/yarp/snapshots/whitequark/cpath.txt b/test/yarp/snapshots/whitequark/cpath.txt
new file mode 100644
index 0000000000..94714a1ac6
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cpath.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...39)(
+  [],
+  StatementsNode(0...39)(
+    [ModuleNode(0...17)(
+       [],
+       (0...6),
+       ConstantPathNode(7...12)(nil, ConstantReadNode(9...12)(), (7...9)),
+       nil,
+       (14...17)
+     ),
+     ModuleNode(19...39)(
+       [],
+       (19...25),
+       ConstantPathNode(26...34)(
+         ConstantReadNode(26...29)(),
+         ConstantReadNode(31...34)(),
+         (29...31)
+       ),
+       nil,
+       (36...39)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/cvar.txt b/test/yarp/snapshots/whitequark/cvar.txt
new file mode 100644
index 0000000000..069ff24b17
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cvar.txt
@@ -0,0 +1 @@
+ProgramNode(0...5)([], StatementsNode(0...5)([ClassVariableReadNode(0...5)()]))
diff --git a/test/yarp/snapshots/whitequark/cvasgn.txt b/test/yarp/snapshots/whitequark/cvasgn.txt
new file mode 100644
index 0000000000..b972caaab7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/cvasgn.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [ClassVariableWriteNode(0...10)((0...5), IntegerNode(8...10)(), (6...7))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/dedenting_heredoc.txt b/test/yarp/snapshots/whitequark/dedenting_heredoc.txt
new file mode 100644
index 0000000000..8db35f7228
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/dedenting_heredoc.txt
@@ -0,0 +1,323 @@
+ProgramNode(0...327)(
+  [],
+  StatementsNode(0...327)(
+    [CallNode(0...28)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...28)(
+         [InterpolatedStringNode(2...28)(
+            (2...8),
+            [StringNode(9...17)(nil, (9...17), nil, "  x\n"),
+             EmbeddedStatementsNode(17...25)(
+               (17...19),
+               StatementsNode(19...24)(
+                 [StringNode(19...24)((19...20), (20...23), (23...24), "  y")]
+               ),
+               (24...25)
+             ),
+             StringNode(25...26)(nil, (25...26), nil, "\n")],
+            (26...28)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(29...55)(
+       nil,
+       nil,
+       (29...30),
+       nil,
+       ArgumentsNode(31...55)(
+         [InterpolatedStringNode(31...55)(
+            (31...37),
+            [StringNode(38...46)(nil, (38...46), nil, "  x\n"),
+             EmbeddedStatementsNode(46...52)(
+               (46...48),
+               StatementsNode(48...51)(
+                 [CallNode(48...51)(
+                    nil,
+                    nil,
+                    (48...51),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "foo"
+                  )]
+               ),
+               (51...52)
+             ),
+             StringNode(52...53)(nil, (52...53), nil, "\n")],
+            (53...55)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(56...78)(
+       nil,
+       nil,
+       (56...57),
+       nil,
+       ArgumentsNode(58...78)(
+         [InterpolatedStringNode(58...78)(
+            (58...62),
+            [StringNode(63...76)(nil, (63...76), nil, "x\n" + "y\n")],
+            (76...78)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(79...97)(
+       nil,
+       nil,
+       (79...80),
+       nil,
+       ArgumentsNode(81...97)(
+         [InterpolatedStringNode(81...97)(
+            (81...85),
+            [StringNode(86...95)(nil, (86...95), nil, "\tx\n" + "y\n")],
+            (95...97)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(98...124)(
+       nil,
+       nil,
+       (98...99),
+       nil,
+       ArgumentsNode(100...124)(
+         [InterpolatedStringNode(100...124)(
+            (100...104),
+            [StringNode(105...122)(nil, (105...122), nil, "x\n" + "y\n")],
+            (122...124)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(125...148)(
+       nil,
+       nil,
+       (125...126),
+       nil,
+       ArgumentsNode(127...148)(
+         [InterpolatedStringNode(127...148)(
+            (127...131),
+            [StringNode(132...146)(nil, (132...146), nil, "\tx\n" + "y\n")],
+            (146...148)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(149...170)(
+       nil,
+       nil,
+       (149...150),
+       nil,
+       ArgumentsNode(151...170)(
+         [InterpolatedStringNode(151...170)(
+            (151...155),
+            [StringNode(156...168)(nil, (156...168), nil, "  x\n" + "\ty\n")],
+            (168...170)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(171...193)(
+       nil,
+       nil,
+       (171...172),
+       nil,
+       ArgumentsNode(173...193)(
+         [InterpolatedStringNode(173...193)(
+            (173...177),
+            [StringNode(178...191)(nil, (178...191), nil, "  x\n" + "  y\n")],
+            (191...193)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(194...205)(
+       nil,
+       nil,
+       (194...195),
+       nil,
+       ArgumentsNode(196...205)(
+         [InterpolatedStringNode(196...205)((196...200), [], (201...205))]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(206...222)(
+       nil,
+       nil,
+       (206...207),
+       nil,
+       ArgumentsNode(208...222)(
+         [InterpolatedStringNode(208...222)(
+            (208...212),
+            [StringNode(213...220)(
+               nil,
+               (213...220),
+               nil,
+               "  x\n" + "\n" + "y\n"
+             )],
+            (220...222)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(223...241)(
+       nil,
+       nil,
+       (223...224),
+       nil,
+       ArgumentsNode(225...241)(
+         [InterpolatedStringNode(225...241)(
+            (225...229),
+            [StringNode(230...239)(
+               nil,
+               (230...239),
+               nil,
+               "x\n" + "\n" + "y\n"
+             )],
+            (239...241)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(242...261)(
+       nil,
+       nil,
+       (242...243),
+       nil,
+       ArgumentsNode(244...261)(
+         [InterpolatedStringNode(244...261)(
+            (244...248),
+            [StringNode(249...259)(nil, (249...259), nil, "x\n" + "  y\n")],
+            (259...261)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(262...275)(
+       nil,
+       nil,
+       (262...263),
+       nil,
+       ArgumentsNode(264...275)(
+         [InterpolatedStringNode(264...275)(
+            (264...268),
+            [StringNode(269...273)(nil, (269...273), nil, "x\n")],
+            (273...275)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(276...290)(
+       nil,
+       nil,
+       (276...277),
+       nil,
+       ArgumentsNode(278...290)(
+         [InterpolatedStringNode(278...290)(
+            (278...282),
+            [StringNode(283...288)(nil, (283...288), nil, "ð\n")],
+            (288...290)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(291...300)(
+       nil,
+       nil,
+       (291...292),
+       nil,
+       ArgumentsNode(293...300)(
+         [InterpolatedStringNode(293...300)((293...297), [], (298...300))]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     ),
+     CallNode(301...327)(
+       nil,
+       nil,
+       (301...302),
+       nil,
+       ArgumentsNode(303...327)(
+         [InterpolatedXStringNode(303...327)(
+            (303...309),
+            [StringNode(310...318)(nil, (310...318), nil, "  x\n"),
+             EmbeddedStatementsNode(318...324)(
+               (318...320),
+               StatementsNode(320...323)(
+                 [CallNode(320...323)(
+                    nil,
+                    nil,
+                    (320...323),
+                    nil,
+                    nil,
+                    nil,
+                    nil,
+                    0,
+                    "foo"
+                  )]
+               ),
+               (323...324)
+             ),
+             StringNode(324...325)(nil, (324...325), nil, "\n")],
+            (325...327)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/dedenting_interpolating_heredoc_fake_line_continuation.txt b/test/yarp/snapshots/whitequark/dedenting_interpolating_heredoc_fake_line_continuation.txt
new file mode 100644
index 0000000000..57cd4345c4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/dedenting_interpolating_heredoc_fake_line_continuation.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [InterpolatedStringNode(0...27)(
+       (0...8),
+       [StringNode(9...23)(nil, (9...23), nil, "baz\\\n" + "qux\n")],
+       (23...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/dedenting_non_interpolating_heredoc_line_continuation.txt b/test/yarp/snapshots/whitequark/dedenting_non_interpolating_heredoc_line_continuation.txt
new file mode 100644
index 0000000000..eea236db48
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/dedenting_non_interpolating_heredoc_line_continuation.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [InterpolatedStringNode(0...26)(
+       (0...8),
+       [StringNode(9...22)(nil, (9...22), nil, "baz\\\n" + "qux\n")],
+       (22...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/def.txt b/test/yarp/snapshots/whitequark/def.txt
new file mode 100644
index 0000000000..f745476533
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/def.txt
@@ -0,0 +1,83 @@
+ProgramNode(0...93)(
+  [],
+  StatementsNode(0...93)(
+    [DefNode(0...14)(
+       (4...9),
+       nil,
+       nil,
+       nil,
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (11...14)
+     ),
+     DefNode(16...28)(
+       (20...23),
+       nil,
+       nil,
+       nil,
+       [],
+       (16...19),
+       nil,
+       nil,
+       nil,
+       nil,
+       (25...28)
+     ),
+     DefNode(30...45)(
+       (34...40),
+       nil,
+       nil,
+       nil,
+       [],
+       (30...33),
+       nil,
+       nil,
+       nil,
+       nil,
+       (42...45)
+     ),
+     DefNode(47...63)(
+       (51...58),
+       nil,
+       nil,
+       nil,
+       [],
+       (47...50),
+       nil,
+       nil,
+       nil,
+       nil,
+       (60...63)
+     ),
+     DefNode(65...77)(
+       (69...72),
+       nil,
+       nil,
+       nil,
+       [],
+       (65...68),
+       nil,
+       nil,
+       nil,
+       nil,
+       (74...77)
+     ),
+     DefNode(79...93)(
+       (83...88),
+       nil,
+       nil,
+       nil,
+       [],
+       (79...82),
+       nil,
+       nil,
+       nil,
+       nil,
+       (90...93)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/defined.txt b/test/yarp/snapshots/whitequark/defined.txt
new file mode 100644
index 0000000000..8dc2e5493e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/defined.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [DefinedNode(0...13)(
+       nil,
+       InstanceVariableReadNode(9...13)(),
+       nil,
+       (0...8)
+     ),
+     DefinedNode(15...27)(
+       nil,
+       CallNode(24...27)(nil, nil, (24...27), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (15...23)
+     ),
+     DefinedNode(29...42)(
+       (37...38),
+       CallNode(38...41)(nil, nil, (38...41), nil, nil, nil, nil, 0, "foo"),
+       (41...42),
+       (29...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/defs.txt b/test/yarp/snapshots/whitequark/defs.txt
new file mode 100644
index 0000000000..d27de42bf2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/defs.txt
@@ -0,0 +1,74 @@
+ProgramNode(0...100)(
+  [],
+  StatementsNode(0...100)(
+    [DefNode(0...18)(
+       (10...13),
+       ParenthesesNode(4...9)(
+         CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+         (4...5),
+         (8...9)
+       ),
+       nil,
+       nil,
+       [],
+       (0...3),
+       (9...10),
+       nil,
+       nil,
+       nil,
+       (15...18)
+     ),
+     DefNode(20...39)(
+       (31...34),
+       ConstantReadNode(24...30)(),
+       nil,
+       nil,
+       [],
+       (20...23),
+       (30...31),
+       nil,
+       nil,
+       nil,
+       (36...39)
+     ),
+     DefNode(41...61)(
+       (53...56),
+       ConstantReadNode(45...51)(),
+       nil,
+       nil,
+       [],
+       (41...44),
+       (51...53),
+       nil,
+       nil,
+       nil,
+       (58...61)
+     ),
+     DefNode(63...80)(
+       (72...75),
+       SelfNode(67...71)(),
+       nil,
+       nil,
+       [],
+       (63...66),
+       (71...72),
+       nil,
+       nil,
+       nil,
+       (77...80)
+     ),
+     DefNode(82...100)(
+       (92...95),
+       SelfNode(86...90)(),
+       nil,
+       nil,
+       [],
+       (82...85),
+       (90...92),
+       nil,
+       nil,
+       nil,
+       (97...100)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/empty_stmt.txt b/test/yarp/snapshots/whitequark/empty_stmt.txt
new file mode 100644
index 0000000000..bd3eaf5ff4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/empty_stmt.txt
@@ -0,0 +1 @@
+ProgramNode(0...0)([], StatementsNode(0...0)([]))
diff --git a/test/yarp/snapshots/whitequark/endless_comparison_method.txt b/test/yarp/snapshots/whitequark/endless_comparison_method.txt
new file mode 100644
index 0000000000..47f43e8235
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/endless_comparison_method.txt
@@ -0,0 +1,203 @@
+ProgramNode(0...179)(
+  [],
+  StatementsNode(0...179)(
+    [DefNode(0...28)(
+       (4...6),
+       nil,
+       ParametersNode(7...12)(
+         [RequiredParameterNode(7...12)(:other)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(16...28)(
+         [CallNode(16...28)(
+            nil,
+            nil,
+            (16...28),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "do_something"
+          )]
+       ),
+       [:other],
+       (0...3),
+       nil,
+       (6...7),
+       (12...13),
+       (14...15),
+       nil
+     ),
+     DefNode(30...58)(
+       (34...36),
+       nil,
+       ParametersNode(37...42)(
+         [RequiredParameterNode(37...42)(:other)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(46...58)(
+         [CallNode(46...58)(
+            nil,
+            nil,
+            (46...58),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "do_something"
+          )]
+       ),
+       [:other],
+       (30...33),
+       nil,
+       (36...37),
+       (42...43),
+       (44...45),
+       nil
+     ),
+     DefNode(60...88)(
+       (64...66),
+       nil,
+       ParametersNode(67...72)(
+         [RequiredParameterNode(67...72)(:other)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(76...88)(
+         [CallNode(76...88)(
+            nil,
+            nil,
+            (76...88),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "do_something"
+          )]
+       ),
+       [:other],
+       (60...63),
+       nil,
+       (66...67),
+       (72...73),
+       (74...75),
+       nil
+     ),
+     DefNode(90...118)(
+       (94...96),
+       nil,
+       ParametersNode(97...102)(
+         [RequiredParameterNode(97...102)(:other)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(106...118)(
+         [CallNode(106...118)(
+            nil,
+            nil,
+            (106...118),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "do_something"
+          )]
+       ),
+       [:other],
+       (90...93),
+       nil,
+       (96...97),
+       (102...103),
+       (104...105),
+       nil
+     ),
+     DefNode(120...149)(
+       (124...127),
+       nil,
+       ParametersNode(128...133)(
+         [RequiredParameterNode(128...133)(:other)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(137...149)(
+         [CallNode(137...149)(
+            nil,
+            nil,
+            (137...149),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "do_something"
+          )]
+       ),
+       [:other],
+       (120...123),
+       nil,
+       (127...128),
+       (133...134),
+       (135...136),
+       nil
+     ),
+     DefNode(151...179)(
+       (155...157),
+       nil,
+       ParametersNode(158...163)(
+         [RequiredParameterNode(158...163)(:other)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(167...179)(
+         [CallNode(167...179)(
+            nil,
+            nil,
+            (167...179),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "do_something"
+          )]
+       ),
+       [:other],
+       (151...154),
+       nil,
+       (157...158),
+       (163...164),
+       (165...166),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/endless_method.txt b/test/yarp/snapshots/whitequark/endless_method.txt
new file mode 100644
index 0000000000..24bd704d3c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/endless_method.txt
@@ -0,0 +1,97 @@
+ProgramNode(0...78)(
+  [],
+  StatementsNode(0...78)(
+    [DefNode(0...14)(
+       (4...7),
+       nil,
+       nil,
+       StatementsNode(12...14)([IntegerNode(12...14)()]),
+       [],
+       (0...3),
+       nil,
+       (7...8),
+       (8...9),
+       (10...11),
+       nil
+     ),
+     DefNode(16...34)(
+       (20...23),
+       nil,
+       ParametersNode(24...25)(
+         [RequiredParameterNode(24...25)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(29...34)(
+         [CallNode(29...34)(
+            LocalVariableReadNode(29...30)(:x, 0),
+            nil,
+            (31...32),
+            nil,
+            ArgumentsNode(33...34)([IntegerNode(33...34)()]),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       [:x],
+       (16...19),
+       nil,
+       (23...24),
+       (25...26),
+       (27...28),
+       nil
+     ),
+     DefNode(36...54)(
+       (44...47),
+       CallNode(40...43)(nil, nil, (40...43), nil, nil, nil, nil, 0, "obj"),
+       nil,
+       StatementsNode(52...54)([IntegerNode(52...54)()]),
+       [],
+       (36...39),
+       (43...44),
+       (47...48),
+       (48...49),
+       (50...51),
+       nil
+     ),
+     DefNode(56...78)(
+       (64...67),
+       CallNode(60...63)(nil, nil, (60...63), nil, nil, nil, nil, 0, "obj"),
+       ParametersNode(68...69)(
+         [RequiredParameterNode(68...69)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(73...78)(
+         [CallNode(73...78)(
+            LocalVariableReadNode(73...74)(:x, 0),
+            nil,
+            (75...76),
+            nil,
+            ArgumentsNode(77...78)([IntegerNode(77...78)()]),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       [:x],
+       (56...59),
+       (63...64),
+       (67...68),
+       (69...70),
+       (71...72),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/endless_method_command_syntax.txt b/test/yarp/snapshots/whitequark/endless_method_command_syntax.txt
new file mode 100644
index 0000000000..476b6f34f6
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/endless_method_command_syntax.txt
@@ -0,0 +1,316 @@
+ProgramNode(0...278)(
+  [],
+  StatementsNode(0...278)(
+    [DefNode(0...22)(
+       (4...7),
+       nil,
+       nil,
+       StatementsNode(10...22)(
+         [CallNode(10...22)(
+            nil,
+            nil,
+            (10...14),
+            nil,
+            ArgumentsNode(15...22)(
+              [StringNode(15...22)((15...16), (16...21), (21...22), "Hello")]
+            ),
+            nil,
+            nil,
+            0,
+            "puts"
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       (8...9),
+       nil
+     ),
+     DefNode(24...48)(
+       (28...31),
+       nil,
+       nil,
+       StatementsNode(36...48)(
+         [CallNode(36...48)(
+            nil,
+            nil,
+            (36...40),
+            nil,
+            ArgumentsNode(41...48)(
+              [StringNode(41...48)((41...42), (42...47), (47...48), "Hello")]
+            ),
+            nil,
+            nil,
+            0,
+            "puts"
+          )]
+       ),
+       [],
+       (24...27),
+       nil,
+       (31...32),
+       (32...33),
+       (34...35),
+       nil
+     ),
+     DefNode(50...69)(
+       (54...57),
+       nil,
+       ParametersNode(58...59)(
+         [RequiredParameterNode(58...59)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(63...69)(
+         [CallNode(63...69)(
+            nil,
+            nil,
+            (63...67),
+            nil,
+            ArgumentsNode(68...69)([LocalVariableReadNode(68...69)(:x, 0)]),
+            nil,
+            nil,
+            0,
+            "puts"
+          )]
+       ),
+       [:x],
+       (50...53),
+       nil,
+       (57...58),
+       (59...60),
+       (61...62),
+       nil
+     ),
+     DefNode(71...97)(
+       (79...82),
+       CallNode(75...78)(nil, nil, (75...78), nil, nil, nil, nil, 0, "obj"),
+       nil,
+       StatementsNode(85...97)(
+         [CallNode(85...97)(
+            nil,
+            nil,
+            (85...89),
+            nil,
+            ArgumentsNode(90...97)(
+              [StringNode(90...97)((90...91), (91...96), (96...97), "Hello")]
+            ),
+            nil,
+            nil,
+            0,
+            "puts"
+          )]
+       ),
+       [],
+       (71...74),
+       (78...79),
+       nil,
+       nil,
+       (83...84),
+       nil
+     ),
+     DefNode(99...127)(
+       (107...110),
+       CallNode(103...106)(
+         nil,
+         nil,
+         (103...106),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "obj"
+       ),
+       nil,
+       StatementsNode(115...127)(
+         [CallNode(115...127)(
+            nil,
+            nil,
+            (115...119),
+            nil,
+            ArgumentsNode(120...127)(
+              [StringNode(120...127)(
+                 (120...121),
+                 (121...126),
+                 (126...127),
+                 "Hello"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "puts"
+          )]
+       ),
+       [],
+       (99...102),
+       (106...107),
+       (110...111),
+       (111...112),
+       (113...114),
+       nil
+     ),
+     DefNode(129...152)(
+       (137...140),
+       CallNode(133...136)(
+         nil,
+         nil,
+         (133...136),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "obj"
+       ),
+       ParametersNode(141...142)(
+         [RequiredParameterNode(141...142)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(146...152)(
+         [CallNode(146...152)(
+            nil,
+            nil,
+            (146...150),
+            nil,
+            ArgumentsNode(151...152)(
+              [LocalVariableReadNode(151...152)(:x, 0)]
+            ),
+            nil,
+            nil,
+            0,
+            "puts"
+          )]
+       ),
+       [:x],
+       (129...132),
+       (136...137),
+       (140...141),
+       (142...143),
+       (144...145),
+       nil
+     ),
+     DefNode(154...214)(
+       (158...165),
+       nil,
+       ParametersNode(166...167)(
+         [RequiredParameterNode(166...167)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(171...214)(
+         [CallNode(171...214)(
+            nil,
+            nil,
+            (171...176),
+            nil,
+            ArgumentsNode(177...214)(
+              [RescueModifierNode(177...214)(
+                 StringNode(177...191)(
+                   (177...178),
+                   (178...190),
+                   (190...191),
+                   "to be caught"
+                 ),
+                 (192...198),
+                 InterpolatedStringNode(199...214)(
+                   (199...200),
+                   [StringNode(200...209)(nil, (200...209), nil, "instance "),
+                    EmbeddedStatementsNode(209...213)(
+                      (209...211),
+                      StatementsNode(211...212)(
+                        [LocalVariableReadNode(211...212)(:x, 0)]
+                      ),
+                      (212...213)
+                    )],
+                   (213...214)
+                 )
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "raise"
+          )]
+       ),
+       [:x],
+       (154...157),
+       nil,
+       (165...166),
+       (167...168),
+       (169...170),
+       nil
+     ),
+     DefNode(216...278)(
+       (225...232),
+       SelfNode(220...224)(),
+       ParametersNode(233...234)(
+         [RequiredParameterNode(233...234)(:x)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(238...278)(
+         [CallNode(238...278)(
+            nil,
+            nil,
+            (238...243),
+            nil,
+            ArgumentsNode(244...278)(
+              [RescueModifierNode(244...278)(
+                 StringNode(244...258)(
+                   (244...245),
+                   (245...257),
+                   (257...258),
+                   "to be caught"
+                 ),
+                 (259...265),
+                 InterpolatedStringNode(266...278)(
+                   (266...267),
+                   [StringNode(267...273)(nil, (267...273), nil, "class "),
+                    EmbeddedStatementsNode(273...277)(
+                      (273...275),
+                      StatementsNode(275...276)(
+                        [LocalVariableReadNode(275...276)(:x, 0)]
+                      ),
+                      (276...277)
+                    )],
+                   (277...278)
+                 )
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "raise"
+          )]
+       ),
+       [:x],
+       (216...219),
+       (224...225),
+       (232...233),
+       (234...235),
+       (236...237),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/endless_method_forwarded_args_legacy.txt b/test/yarp/snapshots/whitequark/endless_method_forwarded_args_legacy.txt
new file mode 100644
index 0000000000..87c50ca846
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/endless_method_forwarded_args_legacy.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [DefNode(0...23)(
+       (4...7),
+       nil,
+       ParametersNode(8...11)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(8...11)(),
+         nil
+       ),
+       StatementsNode(15...23)(
+         [CallNode(15...23)(
+            nil,
+            nil,
+            (15...18),
+            (18...19),
+            ArgumentsNode(19...22)([ForwardingArgumentsNode(19...22)()]),
+            (22...23),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:"..."],
+       (0...3),
+       nil,
+       (7...8),
+       (11...12),
+       (13...14),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/endless_method_with_rescue_mod.txt b/test/yarp/snapshots/whitequark/endless_method_with_rescue_mod.txt
new file mode 100644
index 0000000000..ac757efdbb
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/endless_method_with_rescue_mod.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...47)(
+  [],
+  StatementsNode(0...47)(
+    [DefNode(0...20)(
+       (4...5),
+       nil,
+       nil,
+       StatementsNode(10...20)(
+         [RescueModifierNode(10...20)(
+            IntegerNode(10...11)(),
+            (12...18),
+            IntegerNode(19...20)()
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       (5...6),
+       (6...7),
+       (8...9),
+       nil
+     ),
+     DefNode(22...47)(
+       (31...32),
+       SelfNode(26...30)(),
+       nil,
+       StatementsNode(37...47)(
+         [RescueModifierNode(37...47)(
+            IntegerNode(37...38)(),
+            (39...45),
+            IntegerNode(46...47)()
+          )]
+       ),
+       [],
+       (22...25),
+       (30...31),
+       (32...33),
+       (33...34),
+       (35...36),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/endless_method_without_args.txt b/test/yarp/snapshots/whitequark/endless_method_without_args.txt
new file mode 100644
index 0000000000..778c2b595b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/endless_method_without_args.txt
@@ -0,0 +1,69 @@
+ProgramNode(0...86)(
+  [],
+  StatementsNode(0...86)(
+    [DefNode(0...12)(
+       (4...7),
+       nil,
+       nil,
+       StatementsNode(10...12)([IntegerNode(10...12)()]),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       (8...9),
+       nil
+     ),
+     DefNode(14...37)(
+       (18...21),
+       nil,
+       nil,
+       StatementsNode(24...37)(
+         [RescueModifierNode(24...37)(
+            IntegerNode(24...26)(),
+            (27...33),
+            NilNode(34...37)()
+          )]
+       ),
+       [],
+       (14...17),
+       nil,
+       nil,
+       nil,
+       (22...23),
+       nil
+     ),
+     DefNode(39...56)(
+       (48...51),
+       SelfNode(43...47)(),
+       nil,
+       StatementsNode(54...56)([IntegerNode(54...56)()]),
+       [],
+       (39...42),
+       (47...48),
+       nil,
+       nil,
+       (52...53),
+       nil
+     ),
+     DefNode(58...86)(
+       (67...70),
+       SelfNode(62...66)(),
+       nil,
+       StatementsNode(73...86)(
+         [RescueModifierNode(73...86)(
+            IntegerNode(73...75)(),
+            (76...82),
+            NilNode(83...86)()
+          )]
+       ),
+       [],
+       (58...61),
+       (66...67),
+       nil,
+       nil,
+       (71...72),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ensure.txt b/test/yarp/snapshots/whitequark/ensure.txt
new file mode 100644
index 0000000000..2306cc754d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ensure.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [BeginNode(0...29)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       nil,
+       nil,
+       EnsureNode(13...29)(
+         (13...19),
+         StatementsNode(21...24)(
+           [CallNode(21...24)(
+              nil,
+              nil,
+              (21...24),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (26...29)
+       ),
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ensure_empty.txt b/test/yarp/snapshots/whitequark/ensure_empty.txt
new file mode 100644
index 0000000000..39ac8bfea1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ensure_empty.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [BeginNode(0...16)(
+       (0...5),
+       nil,
+       nil,
+       nil,
+       EnsureNode(6...16)((6...12), nil, (13...16)),
+       (13...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/false.txt b/test/yarp/snapshots/whitequark/false.txt
new file mode 100644
index 0000000000..b435f45a62
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/false.txt
@@ -0,0 +1 @@
+ProgramNode(0...5)([], StatementsNode(0...5)([FalseNode(0...5)()]))
diff --git a/test/yarp/snapshots/whitequark/float.txt b/test/yarp/snapshots/whitequark/float.txt
new file mode 100644
index 0000000000..6ad50dfc58
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/float.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...5)(
+       FloatNode(1...5)(),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     FloatNode(7...11)()]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/for.txt b/test/yarp/snapshots/whitequark/for.txt
new file mode 100644
index 0000000000..cb99b7854e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/for.txt
@@ -0,0 +1,59 @@
+ProgramNode(0...48)(
+  [:a],
+  StatementsNode(0...48)(
+    [ForNode(0...24)(
+       MultiWriteNode(4...5)(
+         [LocalVariableWriteNode(4...5)(:a, 0, nil, (4...5), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       CallNode(9...12)(nil, nil, (9...12), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(16...19)(
+         [CallNode(16...19)(
+            nil,
+            nil,
+            (16...17),
+            nil,
+            ArgumentsNode(18...19)([LocalVariableReadNode(18...19)(:a, 0)]),
+            nil,
+            nil,
+            0,
+            "p"
+          )]
+       ),
+       (0...3),
+       (6...8),
+       (13...15),
+       (21...24)
+     ),
+     ForNode(26...48)(
+       MultiWriteNode(30...31)(
+         [LocalVariableWriteNode(30...31)(:a, 0, nil, (30...31), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       CallNode(35...38)(nil, nil, (35...38), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(40...43)(
+         [CallNode(40...43)(
+            nil,
+            nil,
+            (40...41),
+            nil,
+            ArgumentsNode(42...43)([LocalVariableReadNode(42...43)(:a, 0)]),
+            nil,
+            nil,
+            0,
+            "p"
+          )]
+       ),
+       (26...29),
+       (32...34),
+       nil,
+       (45...48)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/for_mlhs.txt b/test/yarp/snapshots/whitequark/for_mlhs.txt
new file mode 100644
index 0000000000..53e5f67750
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/for_mlhs.txt
@@ -0,0 +1,36 @@
+ProgramNode(0...28)(
+  [:a, :b],
+  StatementsNode(0...28)(
+    [ForNode(0...28)(
+       MultiWriteNode(4...8)(
+         [LocalVariableWriteNode(4...5)(:a, 0, nil, (4...5), nil),
+          LocalVariableWriteNode(7...8)(:b, 0, nil, (7...8), nil)],
+         nil,
+         nil,
+         nil,
+         nil
+       ),
+       CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(17...23)(
+         [CallNode(17...23)(
+            nil,
+            nil,
+            (17...18),
+            nil,
+            ArgumentsNode(19...23)(
+              [LocalVariableReadNode(19...20)(:a, 0),
+               LocalVariableReadNode(22...23)(:b, 0)]
+            ),
+            nil,
+            nil,
+            0,
+            "p"
+          )]
+       ),
+       (0...3),
+       (9...11),
+       nil,
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forward_arg.txt b/test/yarp/snapshots/whitequark/forward_arg.txt
new file mode 100644
index 0000000000..449db10831
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forward_arg.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [DefNode(0...27)(
+       (4...7),
+       nil,
+       ParametersNode(8...11)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(8...11)(),
+         nil
+       ),
+       StatementsNode(14...22)(
+         [CallNode(14...22)(
+            nil,
+            nil,
+            (14...17),
+            (17...18),
+            ArgumentsNode(18...21)([ForwardingArgumentsNode(18...21)()]),
+            (21...22),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:"..."],
+       (0...3),
+       nil,
+       (7...8),
+       (11...12),
+       nil,
+       (24...27)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forward_arg_with_open_args.txt b/test/yarp/snapshots/whitequark/forward_arg_with_open_args.txt
new file mode 100644
index 0000000000..55352e9d70
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forward_arg_with_open_args.txt
@@ -0,0 +1,338 @@
+ProgramNode(0...292)(
+  [],
+  StatementsNode(0...292)(
+    [ParenthesesNode(0...28)(
+       StatementsNode(1...27)(
+         [DefNode(1...27)(
+            (5...8),
+            nil,
+            ParametersNode(9...12)(
+              [],
+              [],
+              [],
+              nil,
+              [],
+              ForwardingParameterNode(9...12)(),
+              nil
+            ),
+            StatementsNode(15...23)(
+              [CallNode(15...23)(
+                 nil,
+                 nil,
+                 (15...18),
+                 (18...19),
+                 ArgumentsNode(19...22)([ForwardingArgumentsNode(19...22)()]),
+                 (22...23),
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            [:"..."],
+            (1...4),
+            nil,
+            nil,
+            nil,
+            nil,
+            (24...27)
+          )]
+       ),
+       (0...1),
+       (27...28)
+     ),
+     ParenthesesNode(30...58)(
+       StatementsNode(31...57)(
+         [DefNode(31...57)(
+            (35...38),
+            nil,
+            ParametersNode(39...42)(
+              [],
+              [],
+              [],
+              nil,
+              [],
+              ForwardingParameterNode(39...42)(),
+              nil
+            ),
+            StatementsNode(44...52)(
+              [CallNode(44...52)(
+                 nil,
+                 nil,
+                 (44...47),
+                 (47...48),
+                 ArgumentsNode(48...51)([ForwardingArgumentsNode(48...51)()]),
+                 (51...52),
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            [:"..."],
+            (31...34),
+            nil,
+            nil,
+            nil,
+            nil,
+            (54...57)
+          )]
+       ),
+       (30...31),
+       (57...58)
+     ),
+     DefNode(60...75)(
+       (64...67),
+       nil,
+       ParametersNode(68...71)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(68...71)(),
+         nil
+       ),
+       nil,
+       [:"..."],
+       (60...63),
+       nil,
+       nil,
+       nil,
+       nil,
+       (72...75)
+     ),
+     DefNode(77...103)(
+       (81...84),
+       nil,
+       ParametersNode(85...88)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(85...88)(),
+         nil
+       ),
+       StatementsNode(90...98)(
+         [CallNode(90...98)(
+            nil,
+            nil,
+            (90...93),
+            (93...94),
+            ArgumentsNode(94...97)([ForwardingArgumentsNode(94...97)()]),
+            (97...98),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:"..."],
+       (77...80),
+       nil,
+       nil,
+       nil,
+       nil,
+       (100...103)
+     ),
+     DefNode(105...134)(
+       (109...112),
+       nil,
+       ParametersNode(113...119)(
+         [RequiredParameterNode(113...114)(:a)],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(116...119)(),
+         nil
+       ),
+       StatementsNode(122...130)(
+         [CallNode(122...130)(
+            nil,
+            nil,
+            (122...125),
+            (125...126),
+            ArgumentsNode(126...129)([ForwardingArgumentsNode(126...129)()]),
+            (129...130),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:a, :"..."],
+       (105...108),
+       nil,
+       nil,
+       nil,
+       nil,
+       (131...134)
+     ),
+     DefNode(136...165)(
+       (140...143),
+       nil,
+       ParametersNode(144...150)(
+         [RequiredParameterNode(144...145)(:a)],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(147...150)(),
+         nil
+       ),
+       StatementsNode(152...160)(
+         [CallNode(152...160)(
+            nil,
+            nil,
+            (152...155),
+            (155...156),
+            ArgumentsNode(156...159)([ForwardingArgumentsNode(156...159)()]),
+            (159...160),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:a, :"..."],
+       (136...139),
+       nil,
+       nil,
+       nil,
+       nil,
+       (162...165)
+     ),
+     DefNode(167...192)(
+       (171...174),
+       nil,
+       ParametersNode(175...188)(
+         [RequiredParameterNode(175...176)(:a)],
+         [OptionalParameterNode(178...183)(
+            :b,
+            (178...179),
+            (180...181),
+            IntegerNode(182...183)()
+          )],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(185...188)(),
+         nil
+       ),
+       nil,
+       [:a, :b, :"..."],
+       (167...170),
+       nil,
+       nil,
+       nil,
+       nil,
+       (189...192)
+     ),
+     DefNode(194...227)(
+       (198...201),
+       nil,
+       ParametersNode(202...212)(
+         [],
+         [OptionalParameterNode(202...207)(
+            :b,
+            (202...203),
+            (204...205),
+            IntegerNode(206...207)()
+          )],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(209...212)(),
+         nil
+       ),
+       StatementsNode(215...223)(
+         [CallNode(215...223)(
+            nil,
+            nil,
+            (215...218),
+            (218...219),
+            ArgumentsNode(219...222)([ForwardingArgumentsNode(219...222)()]),
+            (222...223),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:b, :"..."],
+       (194...197),
+       nil,
+       nil,
+       nil,
+       nil,
+       (224...227)
+     ),
+     DefNode(229...262)(
+       (233...236),
+       nil,
+       ParametersNode(237...247)(
+         [],
+         [OptionalParameterNode(237...242)(
+            :b,
+            (237...238),
+            (239...240),
+            IntegerNode(241...242)()
+          )],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(244...247)(),
+         nil
+       ),
+       StatementsNode(249...257)(
+         [CallNode(249...257)(
+            nil,
+            nil,
+            (249...252),
+            (252...253),
+            ArgumentsNode(253...256)([ForwardingArgumentsNode(253...256)()]),
+            (256...257),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:b, :"..."],
+       (229...232),
+       nil,
+       nil,
+       nil,
+       nil,
+       (259...262)
+     ),
+     DefNode(264...292)(
+       (268...271),
+       nil,
+       ParametersNode(272...278)(
+         [RequiredParameterNode(272...273)(:a)],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(275...278)(),
+         nil
+       ),
+       StatementsNode(280...288)(
+         [CallNode(280...288)(
+            nil,
+            nil,
+            (280...283),
+            (283...284),
+            ArgumentsNode(284...287)([ForwardingArgumentsNode(284...287)()]),
+            (287...288),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:a, :"..."],
+       (264...267),
+       nil,
+       (271...272),
+       (278...279),
+       nil,
+       (289...292)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forward_args_legacy.txt b/test/yarp/snapshots/whitequark/forward_args_legacy.txt
new file mode 100644
index 0000000000..eeaf4f1d53
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forward_args_legacy.txt
@@ -0,0 +1,88 @@
+ProgramNode(0...77)(
+  [],
+  StatementsNode(0...77)(
+    [DefNode(0...27)(
+       (4...7),
+       nil,
+       ParametersNode(8...11)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(8...11)(),
+         nil
+       ),
+       StatementsNode(14...22)(
+         [CallNode(14...22)(
+            nil,
+            nil,
+            (14...17),
+            (17...18),
+            ArgumentsNode(18...21)([ForwardingArgumentsNode(18...21)()]),
+            (21...22),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:"..."],
+       (0...3),
+       nil,
+       (7...8),
+       (11...12),
+       nil,
+       (24...27)
+     ),
+     DefNode(29...46)(
+       (33...36),
+       nil,
+       ParametersNode(37...40)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(37...40)(),
+         nil
+       ),
+       nil,
+       [:"..."],
+       (29...32),
+       nil,
+       (36...37),
+       (40...41),
+       nil,
+       (43...46)
+     ),
+     DefNode(48...77)(
+       (52...55),
+       nil,
+       ParametersNode(56...59)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(56...59)(),
+         nil
+       ),
+       StatementsNode(62...72)(
+         [SuperNode(62...72)(
+            (62...67),
+            (67...68),
+            ArgumentsNode(68...71)([ForwardingArgumentsNode(68...71)()]),
+            (71...72),
+            nil
+          )]
+       ),
+       [:"..."],
+       (48...51),
+       nil,
+       (55...56),
+       (59...60),
+       nil,
+       (74...77)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forwarded_argument_with_kwrestarg.txt b/test/yarp/snapshots/whitequark/forwarded_argument_with_kwrestarg.txt
new file mode 100644
index 0000000000..a751f923c1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forwarded_argument_with_kwrestarg.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...45)(
+  [],
+  StatementsNode(0...45)(
+    [DefNode(0...45)(
+       (4...7),
+       nil,
+       ParametersNode(8...20)(
+         [RequiredParameterNode(8...16)(:argument)],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(18...20)((18...20), nil),
+         nil
+       ),
+       StatementsNode(23...40)(
+         [CallNode(23...40)(
+            nil,
+            nil,
+            (23...26),
+            (26...27),
+            ArgumentsNode(27...39)(
+              [LocalVariableReadNode(27...35)(:argument, 0),
+               KeywordHashNode(37...39)(
+                 [AssocSplatNode(37...39)(nil, (37...39))]
+               )]
+            ),
+            (39...40),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:argument, :**],
+       (0...3),
+       nil,
+       (7...8),
+       (20...21),
+       nil,
+       (42...45)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forwarded_argument_with_restarg.txt b/test/yarp/snapshots/whitequark/forwarded_argument_with_restarg.txt
new file mode 100644
index 0000000000..ff0602c398
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forwarded_argument_with_restarg.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [DefNode(0...43)(
+       (4...7),
+       nil,
+       ParametersNode(8...19)(
+         [RequiredParameterNode(8...16)(:argument)],
+         [],
+         [],
+         RestParameterNode(18...19)((18...19), nil),
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(22...38)(
+         [CallNode(22...38)(
+            nil,
+            nil,
+            (22...25),
+            (25...26),
+            ArgumentsNode(26...37)(
+              [LocalVariableReadNode(26...34)(:argument, 0),
+               SplatNode(36...37)((36...37), nil)]
+            ),
+            (37...38),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:argument, :*],
+       (0...3),
+       nil,
+       (7...8),
+       (19...20),
+       nil,
+       (40...43)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forwarded_kwrestarg.txt b/test/yarp/snapshots/whitequark/forwarded_kwrestarg.txt
new file mode 100644
index 0000000000..0fcac6a298
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forwarded_kwrestarg.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [DefNode(0...25)(
+       (4...7),
+       nil,
+       ParametersNode(8...10)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(8...10)((8...10), nil),
+         nil
+       ),
+       StatementsNode(13...20)(
+         [CallNode(13...20)(
+            nil,
+            nil,
+            (13...16),
+            (16...17),
+            ArgumentsNode(17...19)(
+              [KeywordHashNode(17...19)(
+                 [AssocSplatNode(17...19)(nil, (17...19))]
+               )]
+            ),
+            (19...20),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:**],
+       (0...3),
+       nil,
+       (7...8),
+       (10...11),
+       nil,
+       (22...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forwarded_kwrestarg_with_additional_kwarg.txt b/test/yarp/snapshots/whitequark/forwarded_kwrestarg_with_additional_kwarg.txt
new file mode 100644
index 0000000000..65f75e723a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forwarded_kwrestarg_with_additional_kwarg.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...41)(
+  [],
+  StatementsNode(0...41)(
+    [DefNode(0...41)(
+       (4...7),
+       nil,
+       ParametersNode(8...10)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(8...10)((8...10), nil),
+         nil
+       ),
+       StatementsNode(13...36)(
+         [CallNode(13...36)(
+            nil,
+            nil,
+            (13...16),
+            (16...17),
+            ArgumentsNode(17...35)(
+              [KeywordHashNode(17...35)(
+                 [AssocSplatNode(17...19)(nil, (17...19)),
+                  AssocNode(21...35)(
+                    SymbolNode(21...30)(nil, (21...29), (29...30), "from_foo"),
+                    TrueNode(31...35)(),
+                    nil
+                  )]
+               )]
+            ),
+            (35...36),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:**],
+       (0...3),
+       nil,
+       (7...8),
+       (10...11),
+       nil,
+       (38...41)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/forwarded_restarg.txt b/test/yarp/snapshots/whitequark/forwarded_restarg.txt
new file mode 100644
index 0000000000..d45b60fc0a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/forwarded_restarg.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [DefNode(0...23)(
+       (4...7),
+       nil,
+       ParametersNode(8...9)(
+         [],
+         [],
+         [],
+         RestParameterNode(8...9)((8...9), nil),
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(12...18)(
+         [CallNode(12...18)(
+            nil,
+            nil,
+            (12...15),
+            (15...16),
+            ArgumentsNode(16...17)([SplatNode(16...17)((16...17), nil)]),
+            (17...18),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:*],
+       (0...3),
+       nil,
+       (7...8),
+       (9...10),
+       nil,
+       (20...23)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/gvar.txt b/test/yarp/snapshots/whitequark/gvar.txt
new file mode 100644
index 0000000000..2ac61ed4f4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/gvar.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)([GlobalVariableReadNode(0...4)()])
+)
diff --git a/test/yarp/snapshots/whitequark/gvasgn.txt b/test/yarp/snapshots/whitequark/gvasgn.txt
new file mode 100644
index 0000000000..d6a5327590
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/gvasgn.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [GlobalVariableWriteNode(0...9)((0...4), (5...6), IntegerNode(7...9)())]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/hash_empty.txt b/test/yarp/snapshots/whitequark/hash_empty.txt
new file mode 100644
index 0000000000..b06b9d299b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/hash_empty.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)([HashNode(0...3)((0...1), [], (2...3))])
+)
diff --git a/test/yarp/snapshots/whitequark/hash_hashrocket.txt b/test/yarp/snapshots/whitequark/hash_hashrocket.txt
new file mode 100644
index 0000000000..9b96268c01
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/hash_hashrocket.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [HashNode(0...10)(
+       (0...1),
+       [AssocNode(2...8)(IntegerNode(2...3)(), IntegerNode(7...8)(), (4...6))],
+       (9...10)
+     ),
+     HashNode(12...37)(
+       (12...13),
+       [AssocNode(14...20)(
+          IntegerNode(14...15)(),
+          IntegerNode(19...20)(),
+          (16...18)
+        ),
+        AssocNode(22...35)(
+          SymbolNode(22...26)((22...23), (23...26), nil, "foo"),
+          StringNode(30...35)((30...31), (31...34), (34...35), "bar"),
+          (27...29)
+        )],
+       (36...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/hash_kwsplat.txt b/test/yarp/snapshots/whitequark/hash_kwsplat.txt
new file mode 100644
index 0000000000..ee33876082
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/hash_kwsplat.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [HashNode(0...17)(
+       (0...1),
+       [AssocNode(2...8)(
+          SymbolNode(2...6)(nil, (2...5), (5...6), "foo"),
+          IntegerNode(7...8)(),
+          nil
+        ),
+        AssocSplatNode(10...15)(
+          CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "bar"),
+          (10...12)
+        )],
+       (16...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/hash_label.txt b/test/yarp/snapshots/whitequark/hash_label.txt
new file mode 100644
index 0000000000..cfebb4b70c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/hash_label.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [HashNode(0...10)(
+       (0...1),
+       [AssocNode(2...8)(
+          SymbolNode(2...6)(nil, (2...5), (5...6), "foo"),
+          IntegerNode(7...8)(),
+          nil
+        )],
+       (9...10)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/hash_label_end.txt b/test/yarp/snapshots/whitequark/hash_label_end.txt
new file mode 100644
index 0000000000..7e208d4d84
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/hash_label_end.txt
@@ -0,0 +1,53 @@
+ProgramNode(0...50)(
+  [],
+  StatementsNode(0...50)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...1),
+       (1...2),
+       ArgumentsNode(2...11)(
+         [IfNode(2...11)(
+            nil,
+            CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "a"),
+            StatementsNode(6...9)(
+              [StringNode(6...9)((6...7), (7...8), (8...9), "a")]
+            ),
+            ElseNode(9...11)(
+              (9...10),
+              StatementsNode(10...11)([IntegerNode(10...11)()]),
+              nil
+            ),
+            nil
+          )]
+       ),
+       (11...12),
+       nil,
+       0,
+       "f"
+     ),
+     HashNode(14...26)(
+       (14...15),
+       [AssocNode(16...24)(
+          SymbolNode(16...22)((16...17), (17...20), (20...22), "foo"),
+          IntegerNode(23...24)(),
+          nil
+        )],
+       (25...26)
+     ),
+     HashNode(28...50)(
+       (28...29),
+       [AssocNode(30...38)(
+          SymbolNode(30...36)((30...31), (31...34), (34...36), "foo"),
+          IntegerNode(37...38)(),
+          nil
+        ),
+        AssocNode(40...49)(
+          SymbolNode(40...46)((40...41), (41...44), (44...46), "bar"),
+          HashNode(47...49)((47...48), [], (48...49)),
+          nil
+        )],
+       (49...50)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/hash_pair_value_omission.txt b/test/yarp/snapshots/whitequark/hash_pair_value_omission.txt
new file mode 100644
index 0000000000..825fe1beaa
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/hash_pair_value_omission.txt
@@ -0,0 +1,37 @@
+ProgramNode(0...25)(
+  [],
+  StatementsNode(0...25)(
+    [HashNode(0...6)(
+       (0...1),
+       [AssocNode(1...5)(
+          SymbolNode(1...5)(nil, (1...4), (4...5), "BAR"),
+          nil,
+          nil
+        )],
+       (5...6)
+     ),
+     HashNode(8...16)(
+       (8...9),
+       [AssocNode(9...11)(
+          SymbolNode(9...11)(nil, (9...10), (10...11), "a"),
+          nil,
+          nil
+        ),
+        AssocNode(13...15)(
+          SymbolNode(13...15)(nil, (13...14), (14...15), "b"),
+          nil,
+          nil
+        )],
+       (15...16)
+     ),
+     HashNode(18...25)(
+       (18...19),
+       [AssocNode(19...24)(
+          SymbolNode(19...24)(nil, (19...23), (23...24), "puts"),
+          nil,
+          nil
+        )],
+       (24...25)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/heredoc.txt b/test/yarp/snapshots/whitequark/heredoc.txt
new file mode 100644
index 0000000000..ca45278d3c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/heredoc.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...66)(
+  [],
+  StatementsNode(0...66)(
+    [InterpolatedStringNode(0...22)(
+       (0...8),
+       [StringNode(9...17)(nil, (9...17), nil, "foo\n" + "bar\n")],
+       (17...22)
+     ),
+     InterpolatedStringNode(23...43)(
+       (23...29),
+       [StringNode(30...38)(nil, (30...38), nil, "foo\n" + "bar\n")],
+       (38...43)
+     ),
+     InterpolatedXStringNode(44...66)(
+       (44...52),
+       [StringNode(53...61)(nil, (53...61), nil, "foo\n" + "bar\n")],
+       (61...66)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if.txt b/test/yarp/snapshots/whitequark/if.txt
new file mode 100644
index 0000000000..4d830abafe
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...38)(
+  [],
+  StatementsNode(0...38)(
+    [IfNode(0...20)(
+       (0...2),
+       CallNode(3...6)(nil, nil, (3...6), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(12...15)(
+         [CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       (17...20)
+     ),
+     IfNode(22...38)(
+       (22...24),
+       CallNode(25...28)(nil, nil, (25...28), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(30...33)(
+         [CallNode(30...33)(nil, nil, (30...33), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       (35...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if_else.txt b/test/yarp/snapshots/whitequark/if_else.txt
new file mode 100644
index 0000000000..936195e8da
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if_else.txt
@@ -0,0 +1,55 @@
+ProgramNode(0...58)(
+  [],
+  StatementsNode(0...58)(
+    [IfNode(0...30)(
+       (0...2),
+       CallNode(3...6)(nil, nil, (3...6), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(12...15)(
+         [CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "bar")]
+       ),
+       ElseNode(17...30)(
+         (17...21),
+         StatementsNode(22...25)(
+           [CallNode(22...25)(
+              nil,
+              nil,
+              (22...25),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (27...30)
+       ),
+       (27...30)
+     ),
+     IfNode(32...58)(
+       (32...34),
+       CallNode(35...38)(nil, nil, (35...38), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(40...43)(
+         [CallNode(40...43)(nil, nil, (40...43), nil, nil, nil, nil, 0, "bar")]
+       ),
+       ElseNode(45...58)(
+         (45...49),
+         StatementsNode(50...53)(
+           [CallNode(50...53)(
+              nil,
+              nil,
+              (50...53),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (55...58)
+       ),
+       (55...58)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if_elsif.txt b/test/yarp/snapshots/whitequark/if_elsif.txt
new file mode 100644
index 0000000000..35add80565
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if_elsif.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...38)(
+  [],
+  StatementsNode(0...38)(
+    [IfNode(0...38)(
+       (0...2),
+       CallNode(3...6)(nil, nil, (3...6), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(8...11)(
+         [CallNode(8...11)(nil, nil, (8...11), nil, nil, nil, nil, 0, "bar")]
+       ),
+       IfNode(13...38)(
+         (13...18),
+         CallNode(19...22)(nil, nil, (19...22), nil, nil, nil, nil, 0, "baz"),
+         StatementsNode(24...25)([IntegerNode(24...25)()]),
+         ElseNode(27...38)(
+           (27...31),
+           StatementsNode(32...33)([IntegerNode(32...33)()]),
+           (35...38)
+         ),
+         (35...38)
+       ),
+       (35...38)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if_masgn__24.txt b/test/yarp/snapshots/whitequark/if_masgn__24.txt
new file mode 100644
index 0000000000..59b556f604
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if_masgn__24.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...20)(
+  [:a, :b],
+  StatementsNode(0...20)(
+    [IfNode(0...20)(
+       (0...2),
+       ParenthesesNode(3...15)(
+         StatementsNode(4...14)(
+           [MultiWriteNode(4...14)(
+              [LocalVariableWriteNode(4...5)(:a, 0, nil, (4...5), nil),
+               LocalVariableWriteNode(7...8)(:b, 0, nil, (7...8), nil)],
+              (9...10),
+              CallNode(11...14)(
+                nil,
+                nil,
+                (11...14),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "foo"
+              ),
+              nil,
+              nil
+            )]
+         ),
+         (3...4),
+         (14...15)
+       ),
+       nil,
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if_mod.txt b/test/yarp/snapshots/whitequark/if_mod.txt
new file mode 100644
index 0000000000..5325b8660a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if_mod.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [IfNode(0...10)(
+       (4...6),
+       CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(0...3)(
+         [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if_nl_then.txt b/test/yarp/snapshots/whitequark/if_nl_then.txt
new file mode 100644
index 0000000000..0dae26ffdf
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if_nl_then.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [IfNode(0...19)(
+       (0...2),
+       CallNode(3...6)(nil, nil, (3...6), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(12...15)(
+         [CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       (16...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/if_while_after_class__since_32.txt b/test/yarp/snapshots/whitequark/if_while_after_class__since_32.txt
new file mode 100644
index 0000000000..afa047c4f8
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/if_while_after_class__since_32.txt
@@ -0,0 +1,83 @@
+ProgramNode(0...178)(
+  [],
+  StatementsNode(0...178)(
+    [ClassNode(0...38)(
+       [],
+       (0...5),
+       ConstantPathNode(6...33)(
+         IfNode(6...25)(
+           (6...8),
+           TrueNode(9...13)(),
+           StatementsNode(15...21)([ConstantReadNode(15...21)()]),
+           nil,
+           (22...25)
+         ),
+         ConstantReadNode(27...33)(),
+         (25...27)
+       ),
+       nil,
+       nil,
+       nil,
+       (35...38)
+     ),
+     ClassNode(40...87)(
+       [],
+       (40...45),
+       ConstantPathNode(46...82)(
+         WhileNode(46...74)(
+           (46...51),
+           TrueNode(52...56)(),
+           StatementsNode(58...70)(
+             [BreakNode(58...70)(
+                ArgumentsNode(64...70)([ConstantReadNode(64...70)()]),
+                (58...63)
+              )]
+           )
+         ),
+         ConstantReadNode(76...82)(),
+         (74...76)
+       ),
+       nil,
+       nil,
+       nil,
+       (84...87)
+     ),
+     ModuleNode(89...128)(
+       [],
+       (89...95),
+       ConstantPathNode(96...123)(
+         IfNode(96...115)(
+           (96...98),
+           TrueNode(99...103)(),
+           StatementsNode(105...111)([ConstantReadNode(105...111)()]),
+           nil,
+           (112...115)
+         ),
+         ConstantReadNode(117...123)(),
+         (115...117)
+       ),
+       nil,
+       (125...128)
+     ),
+     ModuleNode(130...178)(
+       [],
+       (130...136),
+       ConstantPathNode(137...173)(
+         WhileNode(137...165)(
+           (137...142),
+           TrueNode(143...147)(),
+           StatementsNode(149...161)(
+             [BreakNode(149...161)(
+                ArgumentsNode(155...161)([ConstantReadNode(155...161)()]),
+                (149...154)
+              )]
+           )
+         ),
+         ConstantReadNode(167...173)(),
+         (165...167)
+       ),
+       nil,
+       (175...178)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/int.txt b/test/yarp/snapshots/whitequark/int.txt
new file mode 100644
index 0000000000..c388070c41
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/int.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [IntegerNode(0...3)(),
+     CallNode(5...8)(
+       IntegerNode(6...8)(),
+       nil,
+       (5...6),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     IntegerNode(10...12)()]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/int___LINE__.txt b/test/yarp/snapshots/whitequark/int___LINE__.txt
new file mode 100644
index 0000000000..0f6e7aa884
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/int___LINE__.txt
@@ -0,0 +1 @@
+ProgramNode(0...8)([], StatementsNode(0...8)([SourceLineNode(0...8)()]))
diff --git a/test/yarp/snapshots/whitequark/interp_digit_var.txt b/test/yarp/snapshots/whitequark/interp_digit_var.txt
new file mode 100644
index 0000000000..0cf76b470b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/interp_digit_var.txt
@@ -0,0 +1,131 @@
+ProgramNode(1...444)(
+  [],
+  StatementsNode(1...444)(
+    [StringNode(1...6)((1...2), (2...5), (5...6), "\#@1"),
+     StringNode(9...15)((9...10), (10...14), (14...15), "\#@@1"),
+     ArrayNode(18...25)(
+       [SymbolNode(21...24)(nil, (21...24), nil, "\#@1")],
+       (18...21),
+       (24...25)
+     ),
+     ArrayNode(28...36)(
+       [SymbolNode(31...35)(nil, (31...35), nil, "\#@@1")],
+       (28...31),
+       (35...36)
+     ),
+     StringNode(39...46)((39...42), (42...45), (45...46), "\#@1"),
+     StringNode(49...57)((49...52), (52...56), (56...57), "\#@@1"),
+     ArrayNode(60...67)(
+       [StringNode(63...66)(nil, (63...66), nil, "\#@1")],
+       (60...63),
+       (66...67)
+     ),
+     ArrayNode(70...78)(
+       [StringNode(73...77)(nil, (73...77), nil, "\#@@1")],
+       (70...73),
+       (77...78)
+     ),
+     ArrayNode(81...90)(
+       [SymbolNode(85...88)(nil, (85...88), nil, "\#@1")],
+       (81...84),
+       (89...90)
+     ),
+     ArrayNode(93...103)(
+       [SymbolNode(97...101)(nil, (97...101), nil, "\#@@1")],
+       (93...96),
+       (102...103)
+     ),
+     StringNode(106...113)((106...109), (109...112), (112...113), "\#@1"),
+     StringNode(116...124)((116...119), (119...123), (123...124), "\#@@1"),
+     RegularExpressionNode(127...134)(
+       (127...130),
+       (130...133),
+       (133...134),
+       "\#@1",
+       0
+     ),
+     RegularExpressionNode(137...145)(
+       (137...140),
+       (140...144),
+       (144...145),
+       "\#@@1",
+       0
+     ),
+     SymbolNode(148...155)((148...151), (151...154), (154...155), "\#@1"),
+     SymbolNode(158...166)((158...161), (161...165), (165...166), "\#@@1"),
+     ArrayNode(169...178)(
+       [StringNode(173...176)(nil, (173...176), nil, "\#@1")],
+       (169...172),
+       (177...178)
+     ),
+     ArrayNode(181...191)(
+       [StringNode(185...189)(nil, (185...189), nil, "\#@@1")],
+       (181...184),
+       (190...191)
+     ),
+     XStringNode(194...201)((194...197), (197...200), (200...201), "\#@1"),
+     XStringNode(204...212)((204...207), (207...211), (211...212), "\#@@1"),
+     StringNode(215...221)((215...217), (217...220), (220...221), "\#@1"),
+     StringNode(224...231)((224...226), (226...230), (230...231), "\#@@1"),
+     StringNode(234...239)((234...235), (235...238), (238...239), "\#@1"),
+     StringNode(242...248)((242...243), (243...247), (247...248), "\#@@1"),
+     RegularExpressionNode(251...256)(
+       (251...252),
+       (252...255),
+       (255...256),
+       "\#@1",
+       0
+     ),
+     RegularExpressionNode(259...265)(
+       (259...260),
+       (260...264),
+       (264...265),
+       "\#@@1",
+       0
+     ),
+     InterpolatedSymbolNode(268...274)(
+       (268...270),
+       [StringNode(270...273)(nil, (270...273), nil, "\#@1")],
+       (273...274)
+     ),
+     InterpolatedSymbolNode(277...284)(
+       (277...279),
+       [StringNode(279...283)(nil, (279...283), nil, "\#@@1")],
+       (283...284)
+     ),
+     SymbolNode(287...293)((287...289), (289...292), (292...293), "\#@1"),
+     SymbolNode(296...303)((296...298), (298...302), (302...303), "\#@@1"),
+     XStringNode(306...311)((306...307), (307...310), (310...311), "\#@1"),
+     XStringNode(314...320)((314...315), (315...319), (319...320), "\#@@1"),
+     InterpolatedStringNode(322...341)(
+       (322...331),
+       [StringNode(332...336)(nil, (332...336), nil, "\#@1\n")],
+       (336...341)
+     ),
+     InterpolatedStringNode(342...362)(
+       (342...351),
+       [StringNode(352...357)(nil, (352...357), nil, "\#@@1\n")],
+       (357...362)
+     ),
+     InterpolatedStringNode(363...382)(
+       (363...372),
+       [StringNode(373...377)(nil, (373...377), nil, "\#@1\n")],
+       (377...382)
+     ),
+     InterpolatedStringNode(383...403)(
+       (383...392),
+       [StringNode(393...398)(nil, (393...398), nil, "\#@@1\n")],
+       (398...403)
+     ),
+     InterpolatedXStringNode(404...423)(
+       (404...413),
+       [StringNode(414...418)(nil, (414...418), nil, "\#@1\n")],
+       (418...423)
+     ),
+     InterpolatedXStringNode(424...444)(
+       (424...433),
+       [StringNode(434...439)(nil, (434...439), nil, "\#@@1\n")],
+       (439...444)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ivar.txt b/test/yarp/snapshots/whitequark/ivar.txt
new file mode 100644
index 0000000000..88bb2ace35
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ivar.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)([InstanceVariableReadNode(0...4)()])
+)
diff --git a/test/yarp/snapshots/whitequark/ivasgn.txt b/test/yarp/snapshots/whitequark/ivasgn.txt
new file mode 100644
index 0000000000..4f6f90bbd7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ivasgn.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [InstanceVariableWriteNode(0...9)((0...4), IntegerNode(7...9)(), (5...6))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/keyword_argument_omission.txt b/test/yarp/snapshots/whitequark/keyword_argument_omission.txt
new file mode 100644
index 0000000000..c1b3b8800d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/keyword_argument_omission.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...3),
+       (3...4),
+       ArgumentsNode(4...10)(
+         [KeywordHashNode(4...10)(
+            [AssocNode(4...6)(
+               SymbolNode(4...6)(nil, (4...5), (5...6), "a"),
+               nil,
+               nil
+             ),
+             AssocNode(8...10)(
+               SymbolNode(8...10)(nil, (8...9), (9...10), "b"),
+               nil,
+               nil
+             )]
+          )]
+       ),
+       (10...11),
+       nil,
+       0,
+       "foo"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwarg.txt b/test/yarp/snapshots/whitequark/kwarg.txt
new file mode 100644
index 0000000000..d096caece0
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwarg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [DefNode(0...16)(
+       (4...5),
+       nil,
+       ParametersNode(6...10)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...10)((6...10), nil)],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo],
+       (0...3),
+       nil,
+       (5...6),
+       (10...11),
+       nil,
+       (13...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwbegin_compstmt.txt b/test/yarp/snapshots/whitequark/kwbegin_compstmt.txt
new file mode 100644
index 0000000000..0d05407aad
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwbegin_compstmt.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [BeginNode(0...20)(
+       (0...5),
+       StatementsNode(6...16)(
+         [CallNode(6...10)(nil, nil, (6...10), nil, nil, nil, nil, 0, "foo!"),
+          CallNode(12...16)(
+            nil,
+            nil,
+            (12...16),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar!"
+          )]
+       ),
+       nil,
+       nil,
+       nil,
+       (17...20)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwnilarg.txt b/test/yarp/snapshots/whitequark/kwnilarg.txt
new file mode 100644
index 0000000000..d7ca269299
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwnilarg.txt
@@ -0,0 +1,75 @@
+ProgramNode(0...46)(
+  [],
+  StatementsNode(0...46)(
+    [LambdaNode(0...12)(
+       [],
+       (0...2),
+       BlockParametersNode(2...9)(
+         ParametersNode(3...8)(
+           [],
+           [],
+           [],
+           nil,
+           [],
+           NoKeywordsParameterNode(3...8)((3...5), (5...8)),
+           nil
+         ),
+         [],
+         (2...3),
+         (8...9)
+       ),
+       nil
+     ),
+     DefNode(14...31)(
+       (18...19),
+       nil,
+       ParametersNode(20...25)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         NoKeywordsParameterNode(20...25)((20...22), (22...25)),
+         nil
+       ),
+       nil,
+       [],
+       (14...17),
+       nil,
+       (19...20),
+       (25...26),
+       nil,
+       (28...31)
+     ),
+     CallNode(33...46)(
+       nil,
+       nil,
+       (33...34),
+       nil,
+       nil,
+       nil,
+       BlockNode(35...46)(
+         [],
+         BlockParametersNode(37...44)(
+           ParametersNode(38...43)(
+             [],
+             [],
+             [],
+             nil,
+             [],
+             NoKeywordsParameterNode(38...43)((38...40), (40...43)),
+             nil
+           ),
+           [],
+           (37...38),
+           (43...44)
+         ),
+         nil,
+         (35...36),
+         (45...46)
+       ),
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwoptarg.txt b/test/yarp/snapshots/whitequark/kwoptarg.txt
new file mode 100644
index 0000000000..9514567387
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwoptarg.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [DefNode(0...18)(
+       (4...5),
+       nil,
+       ParametersNode(6...12)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...12)((6...10), IntegerNode(11...12)())],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo],
+       (0...3),
+       nil,
+       (5...6),
+       (12...13),
+       nil,
+       (15...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwoptarg_with_kwrestarg_and_forwarded_args.txt b/test/yarp/snapshots/whitequark/kwoptarg_with_kwrestarg_and_forwarded_args.txt
new file mode 100644
index 0000000000..14fd8da395
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwoptarg_with_kwrestarg_and_forwarded_args.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [DefNode(0...28)(
+       (4...5),
+       nil,
+       ParametersNode(6...16)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...12)((6...8), NilNode(9...12)())],
+         KeywordRestParameterNode(14...16)((14...16), nil),
+         nil
+       ),
+       StatementsNode(19...24)(
+         [CallNode(19...24)(
+            nil,
+            nil,
+            (19...20),
+            (20...21),
+            ArgumentsNode(21...23)(
+              [KeywordHashNode(21...23)(
+                 [AssocSplatNode(21...23)(nil, (21...23))]
+               )]
+            ),
+            (23...24),
+            nil,
+            0,
+            "b"
+          )]
+       ),
+       [:a, :**],
+       (0...3),
+       nil,
+       (5...6),
+       (16...17),
+       nil,
+       (25...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwrestarg_named.txt b/test/yarp/snapshots/whitequark/kwrestarg_named.txt
new file mode 100644
index 0000000000..591c59dfba
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwrestarg_named.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [DefNode(0...17)(
+       (4...5),
+       nil,
+       ParametersNode(6...11)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(6...11)((6...8), (8...11)),
+         nil
+       ),
+       nil,
+       [:foo],
+       (0...3),
+       nil,
+       (5...6),
+       (11...12),
+       nil,
+       (14...17)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/kwrestarg_unnamed.txt b/test/yarp/snapshots/whitequark/kwrestarg_unnamed.txt
new file mode 100644
index 0000000000..57bf8cc8b4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/kwrestarg_unnamed.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [DefNode(0...14)(
+       (4...5),
+       nil,
+       ParametersNode(6...8)(
+         [],
+         [],
+         [],
+         nil,
+         [],
+         KeywordRestParameterNode(6...8)((6...8), nil),
+         nil
+       ),
+       nil,
+       [:**],
+       (0...3),
+       nil,
+       (5...6),
+       (8...9),
+       nil,
+       (11...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/lbrace_arg_after_command_args.txt b/test/yarp/snapshots/whitequark/lbrace_arg_after_command_args.txt
new file mode 100644
index 0000000000..0b2c12417d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/lbrace_arg_after_command_args.txt
@@ -0,0 +1,42 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [CallNode(0...22)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...8)(
+         [ParenthesesNode(4...8)(
+            StatementsNode(5...7)(
+              [SymbolNode(5...7)((5...6), (6...7), nil, "a")]
+            ),
+            (4...5),
+            (7...8)
+          )]
+       ),
+       nil,
+       BlockNode(9...22)(
+         [],
+         nil,
+         StatementsNode(11...20)(
+           [CallNode(11...20)(
+              nil,
+              nil,
+              (11...12),
+              nil,
+              nil,
+              nil,
+              BlockNode(13...20)([], nil, nil, (13...15), (17...20)),
+              0,
+              "m"
+            )]
+         ),
+         (9...10),
+         (21...22)
+       ),
+       0,
+       "let"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/lparenarg_after_lvar__since_25.txt b/test/yarp/snapshots/whitequark/lparenarg_after_lvar__since_25.txt
new file mode 100644
index 0000000000..c55c1d3c8a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/lparenarg_after_lvar__since_25.txt
@@ -0,0 +1,83 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...14)(
+         [CallNode(4...14)(
+            ParenthesesNode(4...10)(
+              StatementsNode(5...9)(
+                [CallNode(5...9)(
+                   FloatNode(6...9)(),
+                   nil,
+                   (5...6),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "-@"
+                 )]
+              ),
+              (4...5),
+              (9...10)
+            ),
+            (10...11),
+            (11...14),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "abs"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "foo"
+     ),
+     CallNode(16...31)(
+       nil,
+       nil,
+       (16...20),
+       nil,
+       ArgumentsNode(21...31)(
+         [CallNode(21...31)(
+            ParenthesesNode(21...27)(
+              StatementsNode(22...26)(
+                [CallNode(22...26)(
+                   FloatNode(23...26)(),
+                   nil,
+                   (22...23),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "-@"
+                 )]
+              ),
+              (21...22),
+              (26...27)
+            ),
+            (27...28),
+            (28...31),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "abs"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "meth"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/lvar.txt b/test/yarp/snapshots/whitequark/lvar.txt
new file mode 100644
index 0000000000..fc27a87f84
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/lvar.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)(
+    [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/lvar_injecting_match.txt b/test/yarp/snapshots/whitequark/lvar_injecting_match.txt
new file mode 100644
index 0000000000..924b997bc7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/lvar_injecting_match.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...31)(
+  [:match],
+  StatementsNode(0...31)(
+    [CallNode(0...24)(
+       RegularExpressionNode(0...15)(
+         (0...1),
+         (1...14),
+         (14...15),
+         "(?<match>bar)",
+         0
+       ),
+       nil,
+       (16...18),
+       nil,
+       ArgumentsNode(19...24)(
+         [StringNode(19...24)((19...20), (20...23), (23...24), "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "=~"
+     ),
+     LocalVariableReadNode(26...31)(:match, 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/lvasgn.txt b/test/yarp/snapshots/whitequark/lvasgn.txt
new file mode 100644
index 0000000000..403c7f8042
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/lvasgn.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...13)(
+  [:var],
+  StatementsNode(0...13)(
+    [LocalVariableWriteNode(0...8)(
+       :var,
+       0,
+       IntegerNode(6...8)(),
+       (0...3),
+       (4...5)
+     ),
+     LocalVariableReadNode(10...13)(:var, 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/masgn.txt b/test/yarp/snapshots/whitequark/masgn.txt
new file mode 100644
index 0000000000..9945a348c1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/masgn.txt
@@ -0,0 +1,42 @@
+ProgramNode(1...56)(
+  [:foo, :bar, :baz],
+  StatementsNode(1...56)(
+    [MultiWriteNode(1...17)(
+       [LocalVariableWriteNode(1...4)(:foo, 0, nil, (1...4), nil),
+        LocalVariableWriteNode(6...9)(:bar, 0, nil, (6...9), nil)],
+       (11...12),
+       ArrayNode(13...17)(
+         [IntegerNode(13...14)(), IntegerNode(16...17)()],
+         nil,
+         nil
+       ),
+       (0...1),
+       (9...10)
+     ),
+     MultiWriteNode(19...34)(
+       [LocalVariableWriteNode(19...22)(:foo, 0, nil, (19...22), nil),
+        LocalVariableWriteNode(24...27)(:bar, 0, nil, (24...27), nil)],
+       (28...29),
+       ArrayNode(30...34)(
+         [IntegerNode(30...31)(), IntegerNode(33...34)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(36...56)(
+       [LocalVariableWriteNode(36...39)(:foo, 0, nil, (36...39), nil),
+        LocalVariableWriteNode(41...44)(:bar, 0, nil, (41...44), nil),
+        LocalVariableWriteNode(46...49)(:baz, 0, nil, (46...49), nil)],
+       (50...51),
+       ArrayNode(52...56)(
+         [IntegerNode(52...53)(), IntegerNode(55...56)()],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/masgn_attr.txt b/test/yarp/snapshots/whitequark/masgn_attr.txt
new file mode 100644
index 0000000000..c5ab22eb0e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/masgn_attr.txt
@@ -0,0 +1,71 @@
+ProgramNode(0...63)(
+  [:foo],
+  StatementsNode(0...63)(
+    [MultiWriteNode(0...17)(
+       [CallNode(0...6)(
+          SelfNode(0...4)(),
+          (4...5),
+          (5...6),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "A="
+        ),
+        LocalVariableWriteNode(8...11)(:foo, 0, nil, (8...11), nil)],
+       (12...13),
+       LocalVariableReadNode(14...17)(:foo, 0),
+       nil,
+       nil
+     ),
+     MultiWriteNode(19...43)(
+       [CallNode(19...25)(
+          SelfNode(19...23)(),
+          (23...24),
+          (24...25),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "a="
+        ),
+        CallNode(27...37)(
+          SelfNode(27...31)(),
+          nil,
+          (31...37),
+          (31...32),
+          ArgumentsNode(32...36)(
+            [IntegerNode(32...33)(), IntegerNode(35...36)()]
+          ),
+          (36...37),
+          nil,
+          0,
+          "[]="
+        )],
+       (38...39),
+       LocalVariableReadNode(40...43)(:foo, 0),
+       nil,
+       nil
+     ),
+     MultiWriteNode(45...63)(
+       [CallNode(45...52)(
+          SelfNode(45...49)(),
+          (49...51),
+          (51...52),
+          nil,
+          nil,
+          nil,
+          nil,
+          0,
+          "a="
+        ),
+        LocalVariableWriteNode(54...57)(:foo, 0, nil, (54...57), nil)],
+       (58...59),
+       LocalVariableReadNode(60...63)(:foo, 0),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/masgn_cmd.txt b/test/yarp/snapshots/whitequark/masgn_cmd.txt
new file mode 100644
index 0000000000..1ca3b64a0a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/masgn_cmd.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...16)(
+  [:foo, :bar],
+  StatementsNode(0...16)(
+    [MultiWriteNode(0...16)(
+       [LocalVariableWriteNode(0...3)(:foo, 0, nil, (0...3), nil),
+        LocalVariableWriteNode(5...8)(:bar, 0, nil, (5...8), nil)],
+       (9...10),
+       CallNode(11...16)(
+         nil,
+         nil,
+         (11...12),
+         nil,
+         ArgumentsNode(13...16)([LocalVariableReadNode(13...16)(:foo, 0)]),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/masgn_const.txt b/test/yarp/snapshots/whitequark/masgn_const.txt
new file mode 100644
index 0000000000..4db22ceb7a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/masgn_const.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...34)(
+  [:foo],
+  StatementsNode(0...34)(
+    [MultiWriteNode(0...14)(
+       [ConstantPathWriteNode(0...3)(
+          ConstantPathNode(0...3)(nil, ConstantReadNode(2...3)(), (0...2)),
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(5...8)(:foo, 0, nil, (5...8), nil)],
+       (9...10),
+       LocalVariableReadNode(11...14)(:foo, 0),
+       nil,
+       nil
+     ),
+     MultiWriteNode(16...34)(
+       [ConstantPathWriteNode(16...23)(
+          ConstantPathNode(16...23)(
+            SelfNode(16...20)(),
+            ConstantReadNode(22...23)(),
+            (20...22)
+          ),
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(25...28)(:foo, 0, nil, (25...28), nil)],
+       (29...30),
+       LocalVariableReadNode(31...34)(:foo, 0),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/masgn_nested.txt b/test/yarp/snapshots/whitequark/masgn_nested.txt
new file mode 100644
index 0000000000..6321eaa74a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/masgn_nested.txt
@@ -0,0 +1,34 @@
+ProgramNode(2...30)(
+  [:b, :a, :c],
+  StatementsNode(2...30)(
+    [MultiWriteNode(2...13)(
+       [MultiWriteNode(2...4)(
+          [LocalVariableWriteNode(2...3)(:b, 0, nil, (2...3), nil),
+           SplatNode(3...4)((3...4), nil)],
+          nil,
+          nil,
+          (1...2),
+          (5...6)
+        )],
+       (8...9),
+       CallNode(10...13)(nil, nil, (10...13), nil, nil, nil, nil, 0, "foo"),
+       (0...1),
+       (6...7)
+     ),
+     MultiWriteNode(15...30)(
+       [LocalVariableWriteNode(15...16)(:a, 0, nil, (15...16), nil),
+        MultiWriteNode(19...24)(
+          [LocalVariableWriteNode(19...20)(:b, 0, nil, (19...20), nil),
+           LocalVariableWriteNode(22...23)(:c, 0, nil, (22...23), nil)],
+          nil,
+          nil,
+          (18...19),
+          (23...24)
+        )],
+       (25...26),
+       CallNode(27...30)(nil, nil, (27...30), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/masgn_splat.txt b/test/yarp/snapshots/whitequark/masgn_splat.txt
new file mode 100644
index 0000000000..a20c9a1919
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/masgn_splat.txt
@@ -0,0 +1,161 @@
+ProgramNode(0...139)(
+  [:c, :d, :b, :a],
+  StatementsNode(0...139)(
+    [MultiWriteNode(0...7)(
+       [SplatNode(0...1)((0...1), nil)],
+       (2...3),
+       CallNode(4...7)(nil, nil, (4...7), nil, nil, nil, nil, 0, "bar"),
+       nil,
+       nil
+     ),
+     MultiWriteNode(9...22)(
+       [MultiWriteNode(9...10)(
+          [SplatNode(9...10)((9...10), nil)],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(12...13)(:c, 0, nil, (12...13), nil),
+        LocalVariableWriteNode(15...16)(:d, 0, nil, (15...16), nil)],
+       (17...18),
+       CallNode(19...22)(nil, nil, (19...22), nil, nil, nil, nil, 0, "bar"),
+       nil,
+       nil
+     ),
+     MultiWriteNode(24...32)(
+       [SplatNode(24...26)(
+          (24...25),
+          LocalVariableWriteNode(25...26)(:b, 0, nil, (25...26), nil)
+        )],
+       (27...28),
+       CallNode(29...32)(nil, nil, (29...32), nil, nil, nil, nil, 0, "bar"),
+       nil,
+       nil
+     ),
+     MultiWriteNode(34...45)(
+       [MultiWriteNode(34...36)(
+          [SplatNode(34...36)(
+             (34...35),
+             LocalVariableWriteNode(35...36)(:b, 0, nil, (35...36), nil)
+           )],
+          nil,
+          nil,
+          nil,
+          nil
+        ),
+        LocalVariableWriteNode(38...39)(:c, 0, nil, (38...39), nil)],
+       (40...41),
+       CallNode(42...45)(nil, nil, (42...45), nil, nil, nil, nil, 0, "bar"),
+       nil,
+       nil
+     ),
+     MultiWriteNode(47...65)(
+       [InstanceVariableWriteNode(47...51)((47...51), nil, nil),
+        ClassVariableWriteNode(53...58)((53...58), nil, nil)],
+       (59...60),
+       SplatNode(61...65)(
+         (61...62),
+         CallNode(62...65)(nil, nil, (62...65), nil, nil, nil, nil, 0, "foo")
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(67...77)(
+       [LocalVariableWriteNode(67...68)(:a, 0, nil, (67...68), nil),
+        SplatNode(70...71)((70...71), nil)],
+       (72...73),
+       CallNode(74...77)(nil, nil, (74...77), nil, nil, nil, nil, 0, "bar"),
+       nil,
+       nil
+     ),
+     MultiWriteNode(79...92)(
+       [LocalVariableWriteNode(79...80)(:a, 0, nil, (79...80), nil),
+        SplatNode(82...83)((82...83), nil),
+        LocalVariableWriteNode(85...86)(:c, 0, nil, (85...86), nil)],
+       (87...88),
+       CallNode(89...92)(nil, nil, (89...92), nil, nil, nil, nil, 0, "bar"),
+       nil,
+       nil
+     ),
+     MultiWriteNode(94...105)(
+       [LocalVariableWriteNode(94...95)(:a, 0, nil, (94...95), nil),
+        SplatNode(97...99)(
+          (97...98),
+          LocalVariableWriteNode(98...99)(:b, 0, nil, (98...99), nil)
+        )],
+       (100...101),
+       CallNode(102...105)(
+         nil,
+         nil,
+         (102...105),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(107...121)(
+       [LocalVariableWriteNode(107...108)(:a, 0, nil, (107...108), nil),
+        SplatNode(110...112)(
+          (110...111),
+          LocalVariableWriteNode(111...112)(:b, 0, nil, (111...112), nil)
+        ),
+        LocalVariableWriteNode(114...115)(:c, 0, nil, (114...115), nil)],
+       (116...117),
+       CallNode(118...121)(
+         nil,
+         nil,
+         (118...121),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "bar"
+       ),
+       nil,
+       nil
+     ),
+     MultiWriteNode(123...139)(
+       [LocalVariableWriteNode(123...124)(:a, 0, nil, (123...124), nil),
+        LocalVariableWriteNode(126...127)(:b, 0, nil, (126...127), nil)],
+       (128...129),
+       ArrayNode(130...139)(
+         [SplatNode(130...134)(
+            (130...131),
+            CallNode(131...134)(
+              nil,
+              nil,
+              (131...134),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )
+          ),
+          CallNode(136...139)(
+            nil,
+            nil,
+            (136...139),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )],
+         nil,
+         nil
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/method_definition_in_while_cond.txt b/test/yarp/snapshots/whitequark/method_definition_in_while_cond.txt
new file mode 100644
index 0000000000..bf615a18e8
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/method_definition_in_while_cond.txt
@@ -0,0 +1,143 @@
+ProgramNode(0...190)(
+  [],
+  StatementsNode(0...190)(
+    [WhileNode(0...45)(
+       (0...5),
+       DefNode(6...33)(
+         (10...13),
+         nil,
+         ParametersNode(14...28)(
+           [],
+           [OptionalParameterNode(14...28)(
+              :a,
+              (14...15),
+              (16...17),
+              CallNode(18...28)(
+                nil,
+                nil,
+                (18...21),
+                nil,
+                nil,
+                nil,
+                BlockNode(22...28)([], nil, nil, (22...24), (25...28)),
+                0,
+                "tap"
+              )
+            )],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         nil,
+         [:a],
+         (6...9),
+         nil,
+         nil,
+         nil,
+         nil,
+         (30...33)
+       ),
+       StatementsNode(35...40)([BreakNode(35...40)(nil, (35...40))])
+     ),
+     WhileNode(47...89)(
+       (47...52),
+       DefNode(53...77)(
+         (57...60),
+         nil,
+         nil,
+         StatementsNode(62...72)(
+           [CallNode(62...72)(
+              nil,
+              nil,
+              (62...65),
+              nil,
+              nil,
+              nil,
+              BlockNode(66...72)([], nil, nil, (66...68), (69...72)),
+              0,
+              "tap"
+            )]
+         ),
+         [],
+         (53...56),
+         nil,
+         nil,
+         nil,
+         nil,
+         (74...77)
+       ),
+       StatementsNode(79...84)([BreakNode(79...84)(nil, (79...84))])
+     ),
+     WhileNode(91...141)(
+       (91...96),
+       DefNode(97...129)(
+         (106...109),
+         SelfNode(101...105)(),
+         ParametersNode(110...124)(
+           [],
+           [OptionalParameterNode(110...124)(
+              :a,
+              (110...111),
+              (112...113),
+              CallNode(114...124)(
+                nil,
+                nil,
+                (114...117),
+                nil,
+                nil,
+                nil,
+                BlockNode(118...124)([], nil, nil, (118...120), (121...124)),
+                0,
+                "tap"
+              )
+            )],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         nil,
+         [:a],
+         (97...100),
+         (105...106),
+         nil,
+         nil,
+         nil,
+         (126...129)
+       ),
+       StatementsNode(131...136)([BreakNode(131...136)(nil, (131...136))])
+     ),
+     WhileNode(143...190)(
+       (143...148),
+       DefNode(149...178)(
+         (158...161),
+         SelfNode(153...157)(),
+         nil,
+         StatementsNode(163...173)(
+           [CallNode(163...173)(
+              nil,
+              nil,
+              (163...166),
+              nil,
+              nil,
+              nil,
+              BlockNode(167...173)([], nil, nil, (167...169), (170...173)),
+              0,
+              "tap"
+            )]
+         ),
+         [],
+         (149...152),
+         (157...158),
+         nil,
+         nil,
+         nil,
+         (175...178)
+       ),
+       StatementsNode(180...185)([BreakNode(180...185)(nil, (180...185))])
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/module.txt b/test/yarp/snapshots/whitequark/module.txt
new file mode 100644
index 0000000000..54fccb1fa3
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/module.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [ModuleNode(0...15)(
+       [],
+       (0...6),
+       ConstantReadNode(7...10)(),
+       nil,
+       (12...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/multiple_pattern_matches.txt b/test/yarp/snapshots/whitequark/multiple_pattern_matches.txt
new file mode 100644
index 0000000000..7f655240cd
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/multiple_pattern_matches.txt
@@ -0,0 +1,97 @@
+ProgramNode(0...52)(
+  [:a],
+  StatementsNode(0...52)(
+    [MatchRequiredNode(0...12)(
+       HashNode(0...6)(
+         (0...1),
+         [AssocNode(1...5)(
+            SymbolNode(1...3)(nil, (1...2), (2...3), "a"),
+            IntegerNode(4...5)(),
+            nil
+          )],
+         (5...6)
+       ),
+       HashPatternNode(10...12)(
+         nil,
+         [AssocNode(10...12)(
+            SymbolNode(10...12)(nil, (10...11), (11...12), "a"),
+            nil,
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (7...9)
+     ),
+     MatchRequiredNode(13...25)(
+       HashNode(13...19)(
+         (13...14),
+         [AssocNode(14...18)(
+            SymbolNode(14...16)(nil, (14...15), (15...16), "a"),
+            IntegerNode(17...18)(),
+            nil
+          )],
+         (18...19)
+       ),
+       HashPatternNode(23...25)(
+         nil,
+         [AssocNode(23...25)(
+            SymbolNode(23...25)(nil, (23...24), (24...25), "a"),
+            nil,
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (20...22)
+     ),
+     MatchPredicateNode(27...39)(
+       HashNode(27...33)(
+         (27...28),
+         [AssocNode(28...32)(
+            SymbolNode(28...30)(nil, (28...29), (29...30), "a"),
+            IntegerNode(31...32)(),
+            nil
+          )],
+         (32...33)
+       ),
+       HashPatternNode(37...39)(
+         nil,
+         [AssocNode(37...39)(
+            SymbolNode(37...39)(nil, (37...38), (38...39), "a"),
+            nil,
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (34...36)
+     ),
+     MatchPredicateNode(40...52)(
+       HashNode(40...46)(
+         (40...41),
+         [AssocNode(41...45)(
+            SymbolNode(41...43)(nil, (41...42), (42...43), "a"),
+            IntegerNode(44...45)(),
+            nil
+          )],
+         (45...46)
+       ),
+       HashPatternNode(50...52)(
+         nil,
+         [AssocNode(50...52)(
+            SymbolNode(50...52)(nil, (50...51), (51...52), "a"),
+            nil,
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (47...49)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/newline_in_hash_argument.txt b/test/yarp/snapshots/whitequark/newline_in_hash_argument.txt
new file mode 100644
index 0000000000..e2b0456381
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/newline_in_hash_argument.txt
@@ -0,0 +1,85 @@
+ProgramNode(0...74)(
+  [:a, :b],
+  StatementsNode(0...74)(
+    [CaseNode(0...40)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [InNode(9...21)(
+          HashPatternNode(12...14)(
+            nil,
+            [AssocNode(12...14)(
+               SymbolNode(12...14)(nil, (12...13), (13...14), "a"),
+               nil,
+               nil
+             )],
+            nil,
+            nil,
+            nil
+          ),
+          StatementsNode(15...21)(
+            [IntegerNode(15...16)(), TrueNode(17...21)()]
+          ),
+          (9...11),
+          nil
+        ),
+        InNode(22...36)(
+          HashPatternNode(25...29)(
+            nil,
+            [AssocNode(25...29)(
+               SymbolNode(25...29)((25...26), (26...27), (27...29), "b"),
+               nil,
+               nil
+             )],
+            nil,
+            nil,
+            nil
+          ),
+          StatementsNode(30...36)(
+            [IntegerNode(30...31)(), TrueNode(32...36)()]
+          ),
+          (22...24),
+          nil
+        )],
+       nil,
+       (0...4),
+       (37...40)
+     ),
+     CallNode(42...58)(
+       CallNode(42...45)(nil, nil, (42...45), nil, nil, nil, nil, 0, "obj"),
+       (45...46),
+       (46...49),
+       nil,
+       ArgumentsNode(50...58)(
+         [KeywordHashNode(50...58)(
+            [AssocNode(50...58)(
+               SymbolNode(50...56)((50...51), (51...54), (54...56), "foo"),
+               IntegerNode(57...58)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "set"
+     ),
+     CallNode(60...74)(
+       CallNode(60...63)(nil, nil, (60...63), nil, nil, nil, nil, 0, "obj"),
+       (63...64),
+       (64...67),
+       nil,
+       ArgumentsNode(68...74)(
+         [KeywordHashNode(68...74)(
+            [AssocNode(68...74)(
+               SymbolNode(68...72)(nil, (68...71), (71...72), "foo"),
+               IntegerNode(73...74)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "set"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/next.txt b/test/yarp/snapshots/whitequark/next.txt
new file mode 100644
index 0000000000..06997e7d1a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/next.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...33)(
+  [],
+  StatementsNode(0...33)(
+    [NextNode(0...4)(nil, (0...4)),
+     NextNode(6...14)(
+       ArgumentsNode(11...14)(
+         [CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (6...10)
+     ),
+     NextNode(16...22)(
+       ArgumentsNode(20...22)(
+         [ParenthesesNode(20...22)(nil, (20...21), (21...22))]
+       ),
+       (16...20)
+     ),
+     NextNode(24...33)(
+       ArgumentsNode(28...33)(
+         [ParenthesesNode(28...33)(
+            StatementsNode(29...32)(
+              [CallNode(29...32)(
+                 nil,
+                 nil,
+                 (29...32),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            (28...29),
+            (32...33)
+          )]
+       ),
+       (24...28)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/next_block.txt b/test/yarp/snapshots/whitequark/next_block.txt
new file mode 100644
index 0000000000..70f102b417
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/next_block.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [NextNode(0...19)(
+       ArgumentsNode(5...19)(
+         [CallNode(5...19)(
+            nil,
+            nil,
+            (5...8),
+            nil,
+            ArgumentsNode(9...12)(
+              [CallNode(9...12)(
+                 nil,
+                 nil,
+                 (9...12),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            nil,
+            BlockNode(13...19)([], nil, nil, (13...15), (16...19)),
+            0,
+            "fun"
+          )]
+       ),
+       (0...4)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/nil.txt b/test/yarp/snapshots/whitequark/nil.txt
new file mode 100644
index 0000000000..4af940de66
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/nil.txt
@@ -0,0 +1 @@
+ProgramNode(0...3)([], StatementsNode(0...3)([NilNode(0...3)()]))
diff --git a/test/yarp/snapshots/whitequark/nil_expression.txt b/test/yarp/snapshots/whitequark/nil_expression.txt
new file mode 100644
index 0000000000..b9e8d19adb
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/nil_expression.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [ParenthesesNode(0...2)(nil, (0...1), (1...2)),
+     BeginNode(4...13)((4...9), nil, nil, nil, nil, (10...13))]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/non_lvar_injecting_match.txt b/test/yarp/snapshots/whitequark/non_lvar_injecting_match.txt
new file mode 100644
index 0000000000..e44f5db294
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/non_lvar_injecting_match.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallNode(0...28)(
+       InterpolatedRegularExpressionNode(0...19)(
+         (0...1),
+         [EmbeddedStatementsNode(1...5)(
+            (1...3),
+            StatementsNode(3...4)([IntegerNode(3...4)()]),
+            (4...5)
+          ),
+          StringNode(5...18)(nil, (5...18), nil, "(?<match>bar)")],
+         (18...19),
+         0
+       ),
+       nil,
+       (20...22),
+       nil,
+       ArgumentsNode(23...28)(
+         [StringNode(23...28)((23...24), (24...27), (27...28), "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "=~"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/not.txt b/test/yarp/snapshots/whitequark/not.txt
new file mode 100644
index 0000000000..e80943ad15
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/not.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [CallNode(0...7)(
+       CallNode(4...7)(nil, nil, (4...7), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(9...14)(
+       nil,
+       nil,
+       (9...12),
+       (12...13),
+       nil,
+       (13...14),
+       nil,
+       0,
+       "!"
+     ),
+     CallNode(16...24)(
+       CallNode(20...23)(nil, nil, (20...23), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (16...19),
+       (19...20),
+       nil,
+       (23...24),
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/not_cmd.txt b/test/yarp/snapshots/whitequark/not_cmd.txt
new file mode 100644
index 0000000000..b361e5b61c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/not_cmd.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       CallNode(4...9)(
+         nil,
+         nil,
+         (4...5),
+         nil,
+         ArgumentsNode(6...9)(
+           [CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "foo")]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/not_masgn__24.txt b/test/yarp/snapshots/whitequark/not_masgn__24.txt
new file mode 100644
index 0000000000..6880ed7561
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/not_masgn__24.txt
@@ -0,0 +1,39 @@
+ProgramNode(0...13)(
+  [:a, :b],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       ParenthesesNode(1...13)(
+         StatementsNode(2...12)(
+           [MultiWriteNode(2...12)(
+              [LocalVariableWriteNode(2...3)(:a, 0, nil, (2...3), nil),
+               LocalVariableWriteNode(5...6)(:b, 0, nil, (5...6), nil)],
+              (7...8),
+              CallNode(9...12)(
+                nil,
+                nil,
+                (9...12),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "foo"
+              ),
+              nil,
+              nil
+            )]
+         ),
+         (1...2),
+         (12...13)
+       ),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "!"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/nth_ref.txt b/test/yarp/snapshots/whitequark/nth_ref.txt
new file mode 100644
index 0000000000..3bfe4c9a5c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/nth_ref.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...3)(
+  [],
+  StatementsNode(0...3)([NumberedReferenceReadNode(0...3)()])
+)
diff --git a/test/yarp/snapshots/whitequark/numbered_args_after_27.txt b/test/yarp/snapshots/whitequark/numbered_args_after_27.txt
new file mode 100644
index 0000000000..c2cf4217e3
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/numbered_args_after_27.txt
@@ -0,0 +1,177 @@
+ProgramNode(0...65)(
+  [],
+  StatementsNode(0...65)(
+    [LambdaNode(0...17)(
+       [],
+       (0...2),
+       nil,
+       StatementsNode(6...13)(
+         [CallNode(6...13)(
+            CallNode(6...8)(nil, nil, (6...8), nil, nil, nil, nil, 0, "_1"),
+            nil,
+            (9...10),
+            nil,
+            ArgumentsNode(11...13)(
+              [CallNode(11...13)(
+                 nil,
+                 nil,
+                 (11...13),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "_9"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       )
+     ),
+     LambdaNode(19...32)(
+       [],
+       (19...21),
+       nil,
+       StatementsNode(24...31)(
+         [CallNode(24...31)(
+            CallNode(24...26)(
+              nil,
+              nil,
+              (24...26),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "_1"
+            ),
+            nil,
+            (27...28),
+            nil,
+            ArgumentsNode(29...31)(
+              [CallNode(29...31)(
+                 nil,
+                 nil,
+                 (29...31),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "_9"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       )
+     ),
+     CallNode(34...50)(
+       nil,
+       nil,
+       (34...35),
+       nil,
+       nil,
+       nil,
+       BlockNode(36...50)(
+         [],
+         nil,
+         StatementsNode(39...46)(
+           [CallNode(39...46)(
+              CallNode(39...41)(
+                nil,
+                nil,
+                (39...41),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "_1"
+              ),
+              nil,
+              (42...43),
+              nil,
+              ArgumentsNode(44...46)(
+                [CallNode(44...46)(
+                   nil,
+                   nil,
+                   (44...46),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "_9"
+                 )]
+              ),
+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (36...38),
+         (47...50)
+       ),
+       0,
+       "m"
+     ),
+     CallNode(52...65)(
+       nil,
+       nil,
+       (52...53),
+       nil,
+       nil,
+       nil,
+       BlockNode(54...65)(
+         [],
+         nil,
+         StatementsNode(56...63)(
+           [CallNode(56...63)(
+              CallNode(56...58)(
+                nil,
+                nil,
+                (56...58),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "_1"
+              ),
+              nil,
+              (59...60),
+              nil,
+              ArgumentsNode(61...63)(
+                [CallNode(61...63)(
+                   nil,
+                   nil,
+                   (61...63),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "_9"
+                 )]
+              ),
+              nil,
+              nil,
+              0,
+              "+"
+            )]
+         ),
+         (54...55),
+         (64...65)
+       ),
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/numparam_outside_block.txt b/test/yarp/snapshots/whitequark/numparam_outside_block.txt
new file mode 100644
index 0000000000..f99094a3a6
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/numparam_outside_block.txt
@@ -0,0 +1,51 @@
+ProgramNode(0...83)(
+  [],
+  StatementsNode(0...83)(
+    [CallNode(0...2)(nil, nil, (0...2), nil, nil, nil, nil, 0, "_1"),
+     SingletonClassNode(4...25)(
+       [],
+       (4...9),
+       (10...12),
+       CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(18...20)(
+         [CallNode(18...20)(nil, nil, (18...20), nil, nil, nil, nil, 0, "_1")]
+       ),
+       (22...25)
+     ),
+     ClassNode(27...43)(
+       [],
+       (27...32),
+       ConstantReadNode(33...34)(),
+       nil,
+       nil,
+       StatementsNode(36...38)(
+         [CallNode(36...38)(nil, nil, (36...38), nil, nil, nil, nil, 0, "_1")]
+       ),
+       (40...43)
+     ),
+     DefNode(45...64)(
+       (54...55),
+       SelfNode(49...53)(),
+       nil,
+       StatementsNode(57...59)(
+         [CallNode(57...59)(nil, nil, (57...59), nil, nil, nil, nil, 0, "_1")]
+       ),
+       [],
+       (45...48),
+       (53...54),
+       nil,
+       nil,
+       nil,
+       (61...64)
+     ),
+     ModuleNode(66...83)(
+       [],
+       (66...72),
+       ConstantReadNode(73...74)(),
+       StatementsNode(76...78)(
+         [CallNode(76...78)(nil, nil, (76...78), nil, nil, nil, nil, 0, "_1")]
+       ),
+       (80...83)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/op_asgn.txt b/test/yarp/snapshots/whitequark/op_asgn.txt
new file mode 100644
index 0000000000..cb4b4a662f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/op_asgn.txt
@@ -0,0 +1,53 @@
+ProgramNode(0...35)(
+  [],
+  StatementsNode(0...35)(
+    [CallOperatorWriteNode(0...10)(
+       CallNode(0...5)(
+         CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+         (3...4),
+         (4...5),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "A="
+       ),
+       (6...8),
+       IntegerNode(9...10)(),
+       :+
+     ),
+     CallOperatorWriteNode(12...22)(
+       CallNode(12...17)(
+         CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "foo"),
+         (15...16),
+         (16...17),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a="
+       ),
+       (18...20),
+       IntegerNode(21...22)(),
+       :+
+     ),
+     CallOperatorWriteNode(24...35)(
+       CallNode(24...30)(
+         CallNode(24...27)(nil, nil, (24...27), nil, nil, nil, nil, 0, "foo"),
+         (27...29),
+         (29...30),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a="
+       ),
+       (31...33),
+       IntegerNode(34...35)(),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/op_asgn_cmd.txt b/test/yarp/snapshots/whitequark/op_asgn_cmd.txt
new file mode 100644
index 0000000000..e18088fc60
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/op_asgn_cmd.txt
@@ -0,0 +1,151 @@
+ProgramNode(0...64)(
+  [],
+  StatementsNode(0...64)(
+    [CallOperatorWriteNode(0...14)(
+       CallNode(0...5)(
+         CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+         (3...4),
+         (4...5),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "A="
+       ),
+       (6...8),
+       CallNode(9...14)(
+         nil,
+         nil,
+         (9...10),
+         nil,
+         ArgumentsNode(11...14)(
+           [CallNode(11...14)(
+              nil,
+              nil,
+              (11...14),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(16...30)(
+       CallNode(16...21)(
+         CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "foo"),
+         (19...20),
+         (20...21),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a="
+       ),
+       (22...24),
+       CallNode(25...30)(
+         nil,
+         nil,
+         (25...26),
+         nil,
+         ArgumentsNode(27...30)(
+           [CallNode(27...30)(
+              nil,
+              nil,
+              (27...30),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       :+
+     ),
+     ConstantPathOperatorWriteNode(32...47)(
+       ConstantPathNode(32...38)(
+         CallNode(32...35)(nil, nil, (32...35), nil, nil, nil, nil, 0, "foo"),
+         ConstantReadNode(37...38)(),
+         (35...37)
+       ),
+       (39...41),
+       CallNode(42...47)(
+         nil,
+         nil,
+         (42...43),
+         nil,
+         ArgumentsNode(44...47)(
+           [CallNode(44...47)(
+              nil,
+              nil,
+              (44...47),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(49...64)(
+       CallNode(49...55)(
+         CallNode(49...52)(nil, nil, (49...52), nil, nil, nil, nil, 0, "foo"),
+         (52...54),
+         (54...55),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a="
+       ),
+       (56...58),
+       CallNode(59...64)(
+         nil,
+         nil,
+         (59...60),
+         nil,
+         ArgumentsNode(61...64)(
+           [CallNode(61...64)(
+              nil,
+              nil,
+              (61...64),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/op_asgn_index.txt b/test/yarp/snapshots/whitequark/op_asgn_index.txt
new file mode 100644
index 0000000000..8e0bc5f7dc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/op_asgn_index.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallOperatorWriteNode(0...14)(
+       CallNode(0...9)(
+         CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (3...9),
+         (3...4),
+         ArgumentsNode(4...8)([IntegerNode(4...5)(), IntegerNode(7...8)()]),
+         (8...9),
+         nil,
+         0,
+         "[]="
+       ),
+       (10...12),
+       IntegerNode(13...14)(),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/op_asgn_index_cmd.txt b/test/yarp/snapshots/whitequark/op_asgn_index_cmd.txt
new file mode 100644
index 0000000000..c2e27b4353
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/op_asgn_index_cmd.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...18)(
+  [],
+  StatementsNode(0...18)(
+    [CallOperatorWriteNode(0...18)(
+       CallNode(0...9)(
+         CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (3...9),
+         (3...4),
+         ArgumentsNode(4...8)([IntegerNode(4...5)(), IntegerNode(7...8)()]),
+         (8...9),
+         nil,
+         0,
+         "[]="
+       ),
+       (10...12),
+       CallNode(13...18)(
+         nil,
+         nil,
+         (13...14),
+         nil,
+         ArgumentsNode(15...18)(
+           [CallNode(15...18)(
+              nil,
+              nil,
+              (15...18),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/optarg.txt b/test/yarp/snapshots/whitequark/optarg.txt
new file mode 100644
index 0000000000..2cbb681c61
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/optarg.txt
@@ -0,0 +1,63 @@
+ProgramNode(0...44)(
+  [],
+  StatementsNode(0...44)(
+    [DefNode(0...18)(
+       (4...5),
+       nil,
+       ParametersNode(6...13)(
+         [],
+         [OptionalParameterNode(6...13)(
+            :foo,
+            (6...9),
+            (10...11),
+            IntegerNode(12...13)()
+          )],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (15...18)
+     ),
+     DefNode(20...44)(
+       (24...25),
+       nil,
+       ParametersNode(26...38)(
+         [],
+         [OptionalParameterNode(26...31)(
+            :foo,
+            (26...29),
+            (29...30),
+            IntegerNode(30...31)()
+          ),
+          OptionalParameterNode(33...38)(
+            :bar,
+            (33...36),
+            (36...37),
+            IntegerNode(37...38)()
+          )],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo, :bar],
+       (20...23),
+       nil,
+       (25...26),
+       (38...39),
+       nil,
+       (41...44)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/or.txt b/test/yarp/snapshots/whitequark/or.txt
new file mode 100644
index 0000000000..023490e6d3
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/or.txt
@@ -0,0 +1,15 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [OrNode(0...10)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "bar"),
+       (4...6)
+     ),
+     OrNode(12...22)(
+       CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "foo"),
+       CallNode(19...22)(nil, nil, (19...22), nil, nil, nil, nil, 0, "bar"),
+       (16...18)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/or_asgn.txt b/test/yarp/snapshots/whitequark/or_asgn.txt
new file mode 100644
index 0000000000..21cede138f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/or_asgn.txt
@@ -0,0 +1,37 @@
+ProgramNode(0...28)(
+  [],
+  StatementsNode(0...28)(
+    [CallOperatorOrWriteNode(0...11)(
+       CallNode(0...5)(
+         CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+         (3...4),
+         (4...5),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "a="
+       ),
+       IntegerNode(10...11)(),
+       (6...9)
+     ),
+     CallOperatorOrWriteNode(13...28)(
+       CallNode(13...22)(
+         CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo"),
+         nil,
+         (16...22),
+         (16...17),
+         ArgumentsNode(17...21)(
+           [IntegerNode(17...18)(), IntegerNode(20...21)()]
+         ),
+         (21...22),
+         nil,
+         0,
+         "[]="
+       ),
+       IntegerNode(27...28)(),
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_272.txt b/test/yarp/snapshots/whitequark/parser_bug_272.txt
new file mode 100644
index 0000000000..eeb981d694
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_272.txt
@@ -0,0 +1,35 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [CallNode(0...15)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...4)([InstanceVariableReadNode(2...4)()]),
+       nil,
+       BlockNode(5...15)(
+         [:c],
+         BlockParametersNode(8...11)(
+           ParametersNode(9...10)(
+             [RequiredParameterNode(9...10)(:c)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (8...9),
+           (10...11)
+         ),
+         nil,
+         (5...7),
+         (12...15)
+       ),
+       0,
+       "a"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_490.txt b/test/yarp/snapshots/whitequark/parser_bug_490.txt
new file mode 100644
index 0000000000..cd38544ea7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_490.txt
@@ -0,0 +1,95 @@
+ProgramNode(0...132)(
+  [],
+  StatementsNode(0...132)(
+    [DefNode(0...39)(
+       (4...5),
+       nil,
+       nil,
+       StatementsNode(7...34)(
+         [SingletonClassNode(7...34)(
+            [],
+            (7...12),
+            (13...15),
+            SelfNode(16...20)(),
+            StatementsNode(22...29)(
+              [ConstantPathWriteNode(22...29)(
+                 ConstantReadNode(22...23)(),
+                 (24...25),
+                 NilNode(26...29)()
+               )]
+            ),
+            (31...34)
+          )]
+       ),
+       [],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (36...39)
+     ),
+     DefNode(41...85)(
+       (45...46),
+       nil,
+       nil,
+       StatementsNode(48...80)(
+         [SingletonClassNode(48...80)(
+            [],
+            (48...53),
+            (54...56),
+            SelfNode(57...61)(),
+            StatementsNode(63...75)(
+              [ClassNode(63...75)(
+                 [],
+                 (63...68),
+                 ConstantReadNode(69...70)(),
+                 nil,
+                 nil,
+                 nil,
+                 (72...75)
+               )]
+            ),
+            (77...80)
+          )]
+       ),
+       [],
+       (41...44),
+       nil,
+       nil,
+       nil,
+       nil,
+       (82...85)
+     ),
+     DefNode(87...132)(
+       (91...92),
+       nil,
+       nil,
+       StatementsNode(94...127)(
+         [SingletonClassNode(94...127)(
+            [],
+            (94...99),
+            (100...102),
+            SelfNode(103...107)(),
+            StatementsNode(109...122)(
+              [ModuleNode(109...122)(
+                 [],
+                 (109...115),
+                 ConstantReadNode(116...117)(),
+                 nil,
+                 (119...122)
+               )]
+            ),
+            (124...127)
+          )]
+       ),
+       [],
+       (87...90),
+       nil,
+       nil,
+       nil,
+       nil,
+       (129...132)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_507.txt b/test/yarp/snapshots/whitequark/parser_bug_507.txt
new file mode 100644
index 0000000000..e0b69e4c8b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_507.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...19)(
+  [:m],
+  StatementsNode(0...19)(
+    [LocalVariableWriteNode(0...19)(
+       :m,
+       0,
+       LambdaNode(4...19)(
+         [:args],
+         (4...6),
+         BlockParametersNode(7...12)(
+           ParametersNode(7...12)(
+             [],
+             [],
+             [],
+             RestParameterNode(7...12)((7...8), (8...12)),
+             [],
+             nil,
+             nil
+           ),
+           [],
+           nil,
+           nil
+         ),
+         nil
+       ),
+       (0...1),
+       (2...3)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_518.txt b/test/yarp/snapshots/whitequark/parser_bug_518.txt
new file mode 100644
index 0000000000..4de48dad9f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_518.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [ClassNode(0...15)(
+       [],
+       (0...5),
+       ConstantReadNode(6...7)(),
+       (8...9),
+       ConstantReadNode(10...11)(),
+       nil,
+       (12...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_525.txt b/test/yarp/snapshots/whitequark/parser_bug_525.txt
new file mode 100644
index 0000000000..e6fc74d2f6
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_525.txt
@@ -0,0 +1,52 @@
+ProgramNode(0...32)(
+  [],
+  StatementsNode(0...32)(
+    [CallNode(0...32)(
+       nil,
+       nil,
+       (0...2),
+       nil,
+       ArgumentsNode(3...11)(
+         [KeywordHashNode(3...11)(
+            [AssocNode(3...11)(
+               SymbolNode(3...5)((3...4), (4...5), nil, "k"),
+               CallNode(9...11)(
+                 nil,
+                 nil,
+                 (9...11),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "m2"
+               ),
+               (6...8)
+             )]
+          )]
+       ),
+       nil,
+       BlockNode(12...32)(
+         [],
+         nil,
+         StatementsNode(16...27)(
+           [CallNode(16...27)(
+              nil,
+              nil,
+              (16...18),
+              (18...19),
+              nil,
+              (19...20),
+              BlockNode(21...27)([], nil, nil, (21...23), (24...27)),
+              0,
+              "m3"
+            )]
+         ),
+         (12...14),
+         (29...32)
+       ),
+       0,
+       "m1"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_604.txt b/test/yarp/snapshots/whitequark/parser_bug_604.txt
new file mode 100644
index 0000000000..99f5a7a71a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_604.txt
@@ -0,0 +1,30 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [CallNode(0...14)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...7)(
+         [CallNode(2...7)(
+            CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "a"),
+            nil,
+            (4...5),
+            nil,
+            ArgumentsNode(6...7)(
+              [CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "b")]
+            ),
+            nil,
+            nil,
+            0,
+            "+"
+          )]
+       ),
+       nil,
+       BlockNode(8...14)([], nil, nil, (8...10), (11...14)),
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_640.txt b/test/yarp/snapshots/whitequark/parser_bug_640.txt
new file mode 100644
index 0000000000..7af6f48f95
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_640.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [InterpolatedStringNode(0...24)(
+       (0...6),
+       [StringNode(7...20)(nil, (7...20), nil, "baz\n" + "qux\n")],
+       (20...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_645.txt b/test/yarp/snapshots/whitequark/parser_bug_645.txt
new file mode 100644
index 0000000000..22ae40a011
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_645.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [LambdaNode(0...14)(
+       [:arg],
+       (0...2),
+       BlockParametersNode(3...11)(
+         ParametersNode(4...10)(
+           [],
+           [OptionalParameterNode(4...10)(
+              :arg,
+              (4...7),
+              (7...8),
+              HashNode(8...10)((8...9), [], (9...10))
+            )],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (3...4),
+         (10...11)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_bug_830.txt b/test/yarp/snapshots/whitequark/parser_bug_830.txt
new file mode 100644
index 0000000000..c8f0c34e7d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_bug_830.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [RegularExpressionNode(0...4)((0...1), (1...3), (3...4), "(", 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_drops_truncated_parts_of_squiggly_heredoc.txt b/test/yarp/snapshots/whitequark/parser_drops_truncated_parts_of_squiggly_heredoc.txt
new file mode 100644
index 0000000000..b9b0a9ca4d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_drops_truncated_parts_of_squiggly_heredoc.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [InterpolatedStringNode(0...19)(
+       (0...7),
+       [StringNode(8...10)(nil, (8...10), nil, ""),
+        EmbeddedStatementsNode(10...13)((10...12), nil, (12...13)),
+        StringNode(13...14)(nil, (13...14), nil, "\n")],
+       (14...19)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/parser_slash_slash_n_escaping_in_literals.txt b/test/yarp/snapshots/whitequark/parser_slash_slash_n_escaping_in_literals.txt
new file mode 100644
index 0000000000..7228359d39
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/parser_slash_slash_n_escaping_in_literals.txt
@@ -0,0 +1,78 @@
+ProgramNode(0...210)(
+  [],
+  StatementsNode(0...210)(
+    [StringNode(0...6)((0...1), (1...5), (5...6), "a\n" + "b"),
+     ArrayNode(8...16)(
+       [SymbolNode(11...15)(nil, (11...15), nil, "a\n" + "b")],
+       (8...11),
+       (15...16)
+     ),
+     StringNode(18...26)((18...21), (21...25), (25...26), "a\n" + "b"),
+     ArrayNode(28...36)(
+       [StringNode(31...35)(nil, (31...35), nil, "a\n" + "b")],
+       (28...31),
+       (35...36)
+     ),
+     ArrayNode(38...46)(
+       [SymbolNode(41...45)(nil, (41...45), nil, "a\\\n" + "b")],
+       (38...41),
+       (45...46)
+     ),
+     StringNode(48...56)((48...51), (51...55), (55...56), "a\\\n" + "b"),
+     RegularExpressionNode(58...66)(
+       (58...61),
+       (61...65),
+       (65...66),
+       "a\n" + "b",
+       0
+     ),
+     SymbolNode(68...76)((68...71), (71...75), (75...76), "a\n" + "b"),
+     ArrayNode(78...86)(
+       [StringNode(81...85)(nil, (81...85), nil, "a\\\n" + "b")],
+       (78...81),
+       (85...86)
+     ),
+     XStringNode(88...96)((88...91), (91...95), (95...96), "a\n" + "b"),
+     StringNode(98...105)((98...100), (100...104), (104...105), "a\n" + "b"),
+     StringNode(107...113)(
+       (107...108),
+       (108...112),
+       (112...113),
+       "a\\\n" + "b"
+     ),
+     RegularExpressionNode(115...121)(
+       (115...116),
+       (116...120),
+       (120...121),
+       "a\n" + "b",
+       0
+     ),
+     InterpolatedSymbolNode(123...130)(
+       (123...125),
+       [StringNode(125...129)(nil, (125...129), nil, "a\n" + "b")],
+       (129...130)
+     ),
+     SymbolNode(132...139)((132...134), (134...138), (138...139), "a\n" + "b"),
+     InterpolatedStringNode(141...161)(
+       (141...150),
+       [StringNode(151...156)(nil, (151...156), nil, "a\n" + "b\n")],
+       (156...161)
+     ),
+     InterpolatedStringNode(162...182)(
+       (162...171),
+       [StringNode(172...177)(nil, (172...177), nil, "a\\\n" + "b\n")],
+       (177...182)
+     ),
+     InterpolatedXStringNode(183...203)(
+       (183...192),
+       [StringNode(193...198)(nil, (193...198), nil, "a\n" + "b\n")],
+       (198...203)
+     ),
+     XStringNode(204...210)(
+       (204...205),
+       (205...209),
+       (209...210),
+       "a\n" + "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/pattern_matching__FILE__LINE_literals.txt b/test/yarp/snapshots/whitequark/pattern_matching__FILE__LINE_literals.txt
new file mode 100644
index 0000000000..12c279f896
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/pattern_matching__FILE__LINE_literals.txt
@@ -0,0 +1,42 @@
+ProgramNode(8...111)(
+  [],
+  StatementsNode(8...111)(
+    [CaseNode(8...111)(
+       ArrayNode(13...51)(
+         [SourceFileNode(14...22)("/fixtures/whitequark/pattern_matching__FILE__LINE_literals.txt"),
+          CallNode(24...36)(
+            SourceLineNode(24...32)(),
+            nil,
+            (33...34),
+            nil,
+            ArgumentsNode(35...36)([IntegerNode(35...36)()]),
+            nil,
+            nil,
+            0,
+            "+"
+          ),
+          SourceEncodingNode(38...50)()],
+         (13...14),
+         (50...51)
+       ),
+       [InNode(62...99)(
+          ArrayPatternNode(65...99)(
+            nil,
+            [SourceFileNode(66...74)("/fixtures/whitequark/pattern_matching__FILE__LINE_literals.txt"),
+             SourceLineNode(76...84)(),
+             SourceEncodingNode(86...98)()],
+            nil,
+            [],
+            (65...66),
+            (98...99)
+          ),
+          nil,
+          (62...64),
+          nil
+        )],
+       nil,
+       (8...12),
+       (108...111)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/pattern_matching_blank_else.txt b/test/yarp/snapshots/whitequark/pattern_matching_blank_else.txt
new file mode 100644
index 0000000000..df949e90b0
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/pattern_matching_blank_else.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [CaseNode(0...26)(
+       IntegerNode(5...6)(),
+       [InNode(8...15)(
+          IntegerNode(11...12)(),
+          StatementsNode(14...15)([IntegerNode(14...15)()]),
+          (8...10),
+          nil
+        )],
+       ElseNode(17...26)((17...21), nil, (23...26)),
+       (0...4),
+       (23...26)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/pattern_matching_else.txt b/test/yarp/snapshots/whitequark/pattern_matching_else.txt
new file mode 100644
index 0000000000..d776a0ba1e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/pattern_matching_else.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [CaseNode(0...29)(
+       IntegerNode(5...6)(),
+       [InNode(8...15)(
+          IntegerNode(11...12)(),
+          StatementsNode(14...15)([IntegerNode(14...15)()]),
+          (8...10),
+          nil
+        )],
+       ElseNode(17...29)(
+         (17...21),
+         StatementsNode(23...24)([IntegerNode(23...24)()]),
+         (26...29)
+       ),
+       (0...4),
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/pattern_matching_single_line.txt b/test/yarp/snapshots/whitequark/pattern_matching_single_line.txt
new file mode 100644
index 0000000000..7a0546c569
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/pattern_matching_single_line.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...24)(
+  [:a],
+  StatementsNode(0...24)(
+    [MatchRequiredNode(0...8)(
+       IntegerNode(0...1)(),
+       ArrayPatternNode(5...8)(
+         nil,
+         [LocalVariableWriteNode(6...7)(:a, 0, nil, (6...7), nil)],
+         nil,
+         [],
+         (5...6),
+         (7...8)
+       ),
+       (2...4)
+     ),
+     LocalVariableReadNode(10...11)(:a, 0),
+     MatchPredicateNode(13...21)(
+       IntegerNode(13...14)(),
+       ArrayPatternNode(18...21)(
+         nil,
+         [LocalVariableWriteNode(19...20)(:a, 0, nil, (19...20), nil)],
+         nil,
+         [],
+         (18...19),
+         (20...21)
+       ),
+       (15...17)
+     ),
+     LocalVariableReadNode(23...24)(:a, 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/pattern_matching_single_line_allowed_omission_of_parentheses.txt b/test/yarp/snapshots/whitequark/pattern_matching_single_line_allowed_omission_of_parentheses.txt
new file mode 100644
index 0000000000..c6d53befee
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/pattern_matching_single_line_allowed_omission_of_parentheses.txt
@@ -0,0 +1,143 @@
+ProgramNode(0...142)(
+  [:a, :b, :value],
+  StatementsNode(0...142)(
+    [MatchRequiredNode(0...14)(
+       ArrayNode(0...6)(
+         [IntegerNode(1...2)(), IntegerNode(4...5)()],
+         (0...1),
+         (5...6)
+       ),
+       ArrayPatternNode(10...14)(
+         nil,
+         [LocalVariableWriteNode(10...11)(:a, 0, nil, (10...11), nil),
+          LocalVariableWriteNode(13...14)(:b, 0, nil, (13...14), nil)],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       (7...9)
+     ),
+     LocalVariableReadNode(16...17)(:a, 0),
+     MatchPredicateNode(19...33)(
+       ArrayNode(19...25)(
+         [IntegerNode(20...21)(), IntegerNode(23...24)()],
+         (19...20),
+         (24...25)
+       ),
+       ArrayPatternNode(29...33)(
+         nil,
+         [LocalVariableWriteNode(29...30)(:a, 0, nil, (29...30), nil),
+          LocalVariableWriteNode(32...33)(:b, 0, nil, (32...33), nil)],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       (26...28)
+     ),
+     LocalVariableReadNode(35...36)(:a, 0),
+     MatchRequiredNode(38...50)(
+       HashNode(38...44)(
+         (38...39),
+         [AssocNode(39...43)(
+            SymbolNode(39...41)(nil, (39...40), (40...41), "a"),
+            IntegerNode(42...43)(),
+            nil
+          )],
+         (43...44)
+       ),
+       HashPatternNode(48...50)(
+         nil,
+         [AssocNode(48...50)(
+            SymbolNode(48...50)(nil, (48...49), (49...50), "a"),
+            nil,
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (45...47)
+     ),
+     LocalVariableReadNode(52...53)(:a, 0),
+     MatchPredicateNode(55...67)(
+       HashNode(55...61)(
+         (55...56),
+         [AssocNode(56...60)(
+            SymbolNode(56...58)(nil, (56...57), (57...58), "a"),
+            IntegerNode(59...60)(),
+            nil
+          )],
+         (60...61)
+       ),
+       HashPatternNode(65...67)(
+         nil,
+         [AssocNode(65...67)(
+            SymbolNode(65...67)(nil, (65...66), (66...67), "a"),
+            nil,
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (62...64)
+     ),
+     LocalVariableReadNode(69...70)(:a, 0),
+     MatchRequiredNode(72...99)(
+       HashNode(72...85)(
+         (72...73),
+         [AssocNode(73...84)(
+            SymbolNode(73...77)(nil, (73...76), (76...77), "key"),
+            SymbolNode(78...84)((78...79), (79...84), nil, "value"),
+            nil
+          )],
+         (84...85)
+       ),
+       HashPatternNode(89...99)(
+         nil,
+         [AssocNode(89...99)(
+            SymbolNode(89...93)(nil, (89...92), (92...93), "key"),
+            LocalVariableWriteNode(94...99)(:value, 0, nil, (94...99), nil),
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (86...88)
+     ),
+     LocalVariableReadNode(101...106)(:value, 0),
+     MatchPredicateNode(108...135)(
+       HashNode(108...121)(
+         (108...109),
+         [AssocNode(109...120)(
+            SymbolNode(109...113)(nil, (109...112), (112...113), "key"),
+            SymbolNode(114...120)((114...115), (115...120), nil, "value"),
+            nil
+          )],
+         (120...121)
+       ),
+       HashPatternNode(125...135)(
+         nil,
+         [AssocNode(125...135)(
+            SymbolNode(125...129)(nil, (125...128), (128...129), "key"),
+            LocalVariableWriteNode(130...135)(
+              :value,
+              0,
+              nil,
+              (130...135),
+              nil
+            ),
+            nil
+          )],
+         nil,
+         nil,
+         nil
+       ),
+       (122...124)
+     ),
+     LocalVariableReadNode(137...142)(:value, 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/postexe.txt b/test/yarp/snapshots/whitequark/postexe.txt
new file mode 100644
index 0000000000..d6af82bf15
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/postexe.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [PostExecutionNode(0...9)(
+       StatementsNode(6...7)([IntegerNode(6...7)()]),
+       (0...3),
+       (4...5),
+       (8...9)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/preexe.txt b/test/yarp/snapshots/whitequark/preexe.txt
new file mode 100644
index 0000000000..bfa071f72c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/preexe.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [PreExecutionNode(0...11)(
+       StatementsNode(8...9)([IntegerNode(8...9)()]),
+       (0...5),
+       (6...7),
+       (10...11)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/procarg0.txt b/test/yarp/snapshots/whitequark/procarg0.txt
new file mode 100644
index 0000000000..8153bfdd9d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/procarg0.txt
@@ -0,0 +1,70 @@
+ProgramNode(0...31)(
+  [],
+  StatementsNode(0...31)(
+    [CallNode(0...18)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       BlockNode(2...18)(
+         [:foo, :bar],
+         BlockParametersNode(4...16)(
+           ParametersNode(5...15)(
+             [RequiredDestructuredParameterNode(5...15)(
+                [RequiredParameterNode(6...9)(:foo),
+                 RequiredParameterNode(11...14)(:bar)],
+                (5...6),
+                (14...15)
+              )],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (4...5),
+           (15...16)
+         ),
+         nil,
+         (2...3),
+         (17...18)
+       ),
+       0,
+       "m"
+     ),
+     CallNode(20...31)(
+       nil,
+       nil,
+       (20...21),
+       nil,
+       nil,
+       nil,
+       BlockNode(22...31)(
+         [:foo],
+         BlockParametersNode(24...29)(
+           ParametersNode(25...28)(
+             [RequiredParameterNode(25...28)(:foo)],
+             [],
+             [],
+             nil,
+             [],
+             nil,
+             nil
+           ),
+           [],
+           (24...25),
+           (28...29)
+         ),
+         nil,
+         (22...23),
+         (30...31)
+       ),
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/range_exclusive.txt b/test/yarp/snapshots/whitequark/range_exclusive.txt
new file mode 100644
index 0000000000..4571ea317a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/range_exclusive.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)(
+    [RangeNode(0...5)(IntegerNode(0...1)(), IntegerNode(4...5)(), (1...4), 1)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/range_inclusive.txt b/test/yarp/snapshots/whitequark/range_inclusive.txt
new file mode 100644
index 0000000000..021f010a66
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/range_inclusive.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [RangeNode(0...4)(IntegerNode(0...1)(), IntegerNode(3...4)(), (1...3), 0)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rational.txt b/test/yarp/snapshots/whitequark/rational.txt
new file mode 100644
index 0000000000..dfa7d0c29f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rational.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [RationalNode(0...5)(FloatNode(0...4)()),
+     RationalNode(7...10)(IntegerNode(7...9)())]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/redo.txt b/test/yarp/snapshots/whitequark/redo.txt
new file mode 100644
index 0000000000..99ab66873b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/redo.txt
@@ -0,0 +1 @@
+ProgramNode(0...4)([], StatementsNode(0...4)([RedoNode(0...4)()]))
diff --git a/test/yarp/snapshots/whitequark/regex_interp.txt b/test/yarp/snapshots/whitequark/regex_interp.txt
new file mode 100644
index 0000000000..2819567035
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/regex_interp.txt
@@ -0,0 +1,19 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedRegularExpressionNode(0...14)(
+       (0...1),
+       [StringNode(1...4)(nil, (1...4), nil, "foo"),
+        EmbeddedStatementsNode(4...10)(
+          (4...6),
+          StatementsNode(6...9)(
+            [CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "bar")]
+          ),
+          (9...10)
+        ),
+        StringNode(10...13)(nil, (10...13), nil, "baz")],
+       (13...14),
+       0
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/regex_plain.txt b/test/yarp/snapshots/whitequark/regex_plain.txt
new file mode 100644
index 0000000000..cf2728065e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/regex_plain.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [RegularExpressionNode(0...10)((0...1), (1...7), (7...10), "source", 3)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/resbody_list.txt b/test/yarp/snapshots/whitequark/resbody_list.txt
new file mode 100644
index 0000000000..772a0a55f7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/resbody_list.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...39)(
+  [],
+  StatementsNode(0...39)(
+    [BeginNode(0...39)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...34)(
+         (13...19),
+         [ConstantReadNode(20...29)()],
+         nil,
+         nil,
+         StatementsNode(31...34)(
+           [CallNode(31...34)(
+              nil,
+              nil,
+              (31...34),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (36...39)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/resbody_list_mrhs.txt b/test/yarp/snapshots/whitequark/resbody_list_mrhs.txt
new file mode 100644
index 0000000000..29e4ae792b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/resbody_list_mrhs.txt
@@ -0,0 +1,45 @@
+ProgramNode(0...44)(
+  [],
+  StatementsNode(0...44)(
+    [BeginNode(0...44)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...39)(
+         (13...19),
+         [ConstantReadNode(20...29)(),
+          CallNode(31...34)(
+            nil,
+            nil,
+            (31...34),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "foo"
+          )],
+         nil,
+         nil,
+         StatementsNode(36...39)(
+           [CallNode(36...39)(
+              nil,
+              nil,
+              (36...39),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (41...44)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/resbody_list_var.txt b/test/yarp/snapshots/whitequark/resbody_list_var.txt
new file mode 100644
index 0000000000..aca812cd01
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/resbody_list_var.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...39)(
+  [:ex],
+  StatementsNode(0...39)(
+    [BeginNode(0...39)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...34)(
+         (13...19),
+         [CallNode(20...23)(
+            nil,
+            nil,
+            (20...23),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "foo"
+          )],
+         (24...26),
+         LocalVariableWriteNode(27...29)(:ex, 0, nil, (27...29), nil),
+         StatementsNode(31...34)(
+           [CallNode(31...34)(
+              nil,
+              nil,
+              (31...34),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (36...39)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/resbody_var.txt b/test/yarp/snapshots/whitequark/resbody_var.txt
new file mode 100644
index 0000000000..0acad7e908
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/resbody_var.txt
@@ -0,0 +1,73 @@
+ProgramNode(0...73)(
+  [:ex],
+  StatementsNode(0...73)(
+    [BeginNode(0...36)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...31)(
+         (13...19),
+         [],
+         (20...22),
+         InstanceVariableWriteNode(23...26)((23...26), nil, nil),
+         StatementsNode(28...31)(
+           [CallNode(28...31)(
+              nil,
+              nil,
+              (28...31),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (33...36)
+     ),
+     BeginNode(38...73)(
+       (38...43),
+       StatementsNode(45...49)(
+         [CallNode(45...49)(
+            nil,
+            nil,
+            (45...49),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "meth"
+          )]
+       ),
+       RescueNode(51...68)(
+         (51...57),
+         [],
+         (58...60),
+         LocalVariableWriteNode(61...63)(:ex, 0, nil, (61...63), nil),
+         StatementsNode(65...68)(
+           [CallNode(65...68)(
+              nil,
+              nil,
+              (65...68),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (70...73)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue.txt b/test/yarp/snapshots/whitequark/rescue.txt
new file mode 100644
index 0000000000..ae9063361a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue.txt
@@ -0,0 +1,34 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [BeginNode(0...29)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...24)(
+         (13...19),
+         [],
+         nil,
+         nil,
+         StatementsNode(21...24)(
+           [CallNode(21...24)(
+              nil,
+              nil,
+              (21...24),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       nil,
+       (26...29)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_else.txt b/test/yarp/snapshots/whitequark/rescue_else.txt
new file mode 100644
index 0000000000..4c4e9ab987
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_else.txt
@@ -0,0 +1,50 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [BeginNode(0...40)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...24)(
+         (13...19),
+         [],
+         nil,
+         nil,
+         StatementsNode(21...24)(
+           [CallNode(21...24)(
+              nil,
+              nil,
+              (21...24),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         nil
+       ),
+       ElseNode(26...40)(
+         (26...30),
+         StatementsNode(32...35)(
+           [CallNode(32...35)(
+              nil,
+              nil,
+              (32...35),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (37...40)
+       ),
+       nil,
+       (37...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_else_ensure.txt b/test/yarp/snapshots/whitequark/rescue_else_ensure.txt
new file mode 100644
index 0000000000..0d44b99b70
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_else_ensure.txt
@@ -0,0 +1,66 @@
+ProgramNode(0...51)(
+  [],
+  StatementsNode(0...51)(
+    [BeginNode(0...51)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...24)(
+         (13...19),
+         [],
+         nil,
+         nil,
+         StatementsNode(21...24)(
+           [CallNode(21...24)(
+              nil,
+              nil,
+              (21...24),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         nil
+       ),
+       ElseNode(26...42)(
+         (26...30),
+         StatementsNode(31...34)(
+           [CallNode(31...34)(
+              nil,
+              nil,
+              (31...34),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "foo"
+            )]
+         ),
+         (36...42)
+       ),
+       EnsureNode(36...51)(
+         (36...42),
+         StatementsNode(44...47)(
+           [CallNode(44...47)(
+              nil,
+              nil,
+              (44...47),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (48...51)
+       ),
+       (48...51)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_ensure.txt b/test/yarp/snapshots/whitequark/rescue_ensure.txt
new file mode 100644
index 0000000000..6f9b287c1c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_ensure.txt
@@ -0,0 +1,50 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [BeginNode(0...42)(
+       (0...5),
+       StatementsNode(7...11)(
+         [CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth")]
+       ),
+       RescueNode(13...24)(
+         (13...19),
+         [],
+         nil,
+         nil,
+         StatementsNode(21...24)(
+           [CallNode(21...24)(
+              nil,
+              nil,
+              (21...24),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         nil
+       ),
+       nil,
+       EnsureNode(26...42)(
+         (26...32),
+         StatementsNode(34...37)(
+           [CallNode(34...37)(
+              nil,
+              nil,
+              (34...37),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "bar"
+            )]
+         ),
+         (39...42)
+       ),
+       (39...42)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_in_lambda_block.txt b/test/yarp/snapshots/whitequark/rescue_in_lambda_block.txt
new file mode 100644
index 0000000000..475b72dbe8
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_in_lambda_block.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [LambdaNode(0...17)(
+       [],
+       (0...2),
+       nil,
+       BeginNode(6...17)(
+         nil,
+         nil,
+         RescueNode(6...12)((6...12), [], nil, nil, nil, nil),
+         nil,
+         nil,
+         (14...17)
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_mod.txt b/test/yarp/snapshots/whitequark/rescue_mod.txt
new file mode 100644
index 0000000000..baae026bb8
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_mod.txt
@@ -0,0 +1,10 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [RescueModifierNode(0...15)(
+       CallNode(0...4)(nil, nil, (0...4), nil, nil, nil, nil, 0, "meth"),
+       (5...11),
+       CallNode(12...15)(nil, nil, (12...15), nil, nil, nil, nil, 0, "bar")
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_mod_asgn.txt b/test/yarp/snapshots/whitequark/rescue_mod_asgn.txt
new file mode 100644
index 0000000000..39ddc02f3b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_mod_asgn.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...21)(
+  [:foo],
+  StatementsNode(0...21)(
+    [LocalVariableWriteNode(0...21)(
+       :foo,
+       0,
+       RescueModifierNode(6...21)(
+         CallNode(6...10)(nil, nil, (6...10), nil, nil, nil, nil, 0, "meth"),
+         (11...17),
+         CallNode(18...21)(nil, nil, (18...21), nil, nil, nil, nil, 0, "bar")
+       ),
+       (0...3),
+       (4...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_mod_masgn.txt b/test/yarp/snapshots/whitequark/rescue_mod_masgn.txt
new file mode 100644
index 0000000000..f027de1f73
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_mod_masgn.txt
@@ -0,0 +1,21 @@
+ProgramNode(0...29)(
+  [:foo, :bar],
+  StatementsNode(0...29)(
+    [MultiWriteNode(0...29)(
+       [LocalVariableWriteNode(0...3)(:foo, 0, nil, (0...3), nil),
+        LocalVariableWriteNode(5...8)(:bar, 0, nil, (5...8), nil)],
+       (9...10),
+       RescueModifierNode(11...29)(
+         CallNode(11...15)(nil, nil, (11...15), nil, nil, nil, nil, 0, "meth"),
+         (16...22),
+         ArrayNode(23...29)(
+           [IntegerNode(24...25)(), IntegerNode(27...28)()],
+           (23...24),
+           (28...29)
+         )
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_mod_op_assign.txt b/test/yarp/snapshots/whitequark/rescue_mod_op_assign.txt
new file mode 100644
index 0000000000..9f846f792e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_mod_op_assign.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...22)(
+  [:foo],
+  StatementsNode(0...22)(
+    [LocalVariableOperatorWriteNode(0...22)(
+       (0...3),
+       (4...6),
+       RescueModifierNode(7...22)(
+         CallNode(7...11)(nil, nil, (7...11), nil, nil, nil, nil, 0, "meth"),
+         (12...18),
+         CallNode(19...22)(nil, nil, (19...22), nil, nil, nil, nil, 0, "bar")
+       ),
+       :foo,
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/rescue_without_begin_end.txt b/test/yarp/snapshots/whitequark/rescue_without_begin_end.txt
new file mode 100644
index 0000000000..bc290f265b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/rescue_without_begin_end.txt
@@ -0,0 +1,60 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [CallNode(0...30)(
+       nil,
+       nil,
+       (0...4),
+       nil,
+       nil,
+       nil,
+       BlockNode(5...30)(
+         [],
+         nil,
+         BeginNode(9...30)(
+           nil,
+           StatementsNode(9...12)(
+             [CallNode(9...12)(
+                nil,
+                nil,
+                (9...12),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "foo"
+              )]
+           ),
+           RescueNode(14...25)(
+             (14...20),
+             [],
+             nil,
+             nil,
+             StatementsNode(22...25)(
+               [CallNode(22...25)(
+                  nil,
+                  nil,
+                  (22...25),
+                  nil,
+                  nil,
+                  nil,
+                  nil,
+                  0,
+                  "bar"
+                )]
+             ),
+             nil
+           ),
+           nil,
+           nil,
+           (27...30)
+         ),
+         (5...7),
+         (27...30)
+       ),
+       0,
+       "meth"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/restarg_named.txt b/test/yarp/snapshots/whitequark/restarg_named.txt
new file mode 100644
index 0000000000..ce26b2fc67
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/restarg_named.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [DefNode(0...16)(
+       (4...5),
+       nil,
+       ParametersNode(6...10)(
+         [],
+         [],
+         [],
+         RestParameterNode(6...10)((6...7), (7...10)),
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:foo],
+       (0...3),
+       nil,
+       (5...6),
+       (10...11),
+       nil,
+       (13...16)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/restarg_unnamed.txt b/test/yarp/snapshots/whitequark/restarg_unnamed.txt
new file mode 100644
index 0000000000..b6778e293c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/restarg_unnamed.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [DefNode(0...13)(
+       (4...5),
+       nil,
+       ParametersNode(6...7)(
+         [],
+         [],
+         [],
+         RestParameterNode(6...7)((6...7), nil),
+         [],
+         nil,
+         nil
+       ),
+       nil,
+       [:*],
+       (0...3),
+       nil,
+       (5...6),
+       (7...8),
+       nil,
+       (10...13)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/retry.txt b/test/yarp/snapshots/whitequark/retry.txt
new file mode 100644
index 0000000000..8963228e67
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/retry.txt
@@ -0,0 +1 @@
+ProgramNode(0...5)([], StatementsNode(0...5)([RetryNode(0...5)()]))
diff --git a/test/yarp/snapshots/whitequark/return.txt b/test/yarp/snapshots/whitequark/return.txt
new file mode 100644
index 0000000000..da8c8a6f0f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/return.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...41)(
+  [],
+  StatementsNode(0...41)(
+    [ReturnNode(0...6)((0...6), nil),
+     ReturnNode(8...18)(
+       (8...14),
+       ArgumentsNode(15...18)(
+         [CallNode(15...18)(nil, nil, (15...18), nil, nil, nil, nil, 0, "foo")]
+       )
+     ),
+     ReturnNode(20...28)(
+       (20...26),
+       ArgumentsNode(26...28)(
+         [ParenthesesNode(26...28)(nil, (26...27), (27...28))]
+       )
+     ),
+     ReturnNode(30...41)(
+       (30...36),
+       ArgumentsNode(36...41)(
+         [ParenthesesNode(36...41)(
+            StatementsNode(37...40)(
+              [CallNode(37...40)(
+                 nil,
+                 nil,
+                 (37...40),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            (36...37),
+            (40...41)
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/return_block.txt b/test/yarp/snapshots/whitequark/return_block.txt
new file mode 100644
index 0000000000..87b2028abe
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/return_block.txt
@@ -0,0 +1,33 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [ReturnNode(0...21)(
+       (0...6),
+       ArgumentsNode(7...21)(
+         [CallNode(7...21)(
+            nil,
+            nil,
+            (7...10),
+            nil,
+            ArgumentsNode(11...14)(
+              [CallNode(11...14)(
+                 nil,
+                 nil,
+                 (11...14),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "foo"
+               )]
+            ),
+            nil,
+            BlockNode(15...21)([], nil, nil, (15...17), (18...21)),
+            0,
+            "fun"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_10279.txt b/test/yarp/snapshots/whitequark/ruby_bug_10279.txt
new file mode 100644
index 0000000000..74c9d70fa3
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_10279.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [HashNode(0...24)(
+       (0...1),
+       [AssocNode(1...23)(
+          SymbolNode(1...3)(nil, (1...2), (2...3), "a"),
+          IfNode(4...23)(
+            (4...6),
+            TrueNode(7...11)(),
+            StatementsNode(17...19)([IntegerNode(17...19)()]),
+            nil,
+            (20...23)
+          ),
+          nil
+        )],
+       (23...24)
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+  )
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_10653.txt b/test/yarp/snapshots/whitequark/ruby_bug_10653.txt
new file mode 100644
index 0000000000..9223db088b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_10653.txt
@@ -0,0 +1,131 @@
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11107.txt b/test/yarp/snapshots/whitequark/ruby_bug_11107.txt
new file mode 100644
index 0000000000..0f5b129c5c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11107.txt
@@ -0,0 +1,35 @@
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11380.txt b/test/yarp/snapshots/whitequark/ruby_bug_11380.txt
new file mode 100644
index 0000000000..5962097a6a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11380.txt
@@ -0,0 +1,32 @@
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11873.txt b/test/yarp/snapshots/whitequark/ruby_bug_11873.txt
new file mode 100644
index 0000000000..fa2e919f6e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11873.txt
@@ -0,0 +1,665 @@
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11873_a.txt b/test/yarp/snapshots/whitequark/ruby_bug_11873_a.txt
new file mode 100644
index 0000000000..4cb06f16cd
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11873_a.txt
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11873_b.txt b/test/yarp/snapshots/whitequark/ruby_bug_11873_b.txt
new file mode 100644
index 0000000000..b84ec0e5b1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11873_b.txt
@@ -0,0 +1,82 @@
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diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11989.txt b/test/yarp/snapshots/whitequark/ruby_bug_11989.txt
new file mode 100644
index 0000000000..fb5f7330c9
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11989.txt
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+       ArgumentsNode(2...21)(
+         [InterpolatedStringNode(2...21)(
+            (2...8),
+            [StringNode(9...19)(nil, (9...19), nil, "x\n" + " y\n")],
+            (19...21)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_11990.txt b/test/yarp/snapshots/whitequark/ruby_bug_11990.txt
new file mode 100644
index 0000000000..1a1a68796e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_11990.txt
@@ -0,0 +1,25 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...12)(
+         [StringConcatNode(2...12)(
+            InterpolatedStringNode(2...19)(
+              (2...6),
+              [StringNode(13...17)(nil, (13...17), nil, "x\n")],
+              (17...19)
+            ),
+            StringNode(7...12)((7...8), (8...11), (11...12), "  y")
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "p"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_12073.txt b/test/yarp/snapshots/whitequark/ruby_bug_12073.txt
new file mode 100644
index 0000000000..7614f1b120
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_12073.txt
@@ -0,0 +1,71 @@
+ProgramNode(0...49)(
+  [:a],
+  StatementsNode(0...49)(
+    [LocalVariableWriteNode(0...5)(
+       :a,
+       0,
+       IntegerNode(4...5)(),
+       (0...1),
+       (2...3)
+     ),
+     CallNode(7...13)(
+       nil,
+       nil,
+       (7...8),
+       nil,
+       ArgumentsNode(9...13)(
+         [KeywordHashNode(9...13)(
+            [AssocNode(9...13)(
+               SymbolNode(9...11)(nil, (9...10), (10...11), "b"),
+               IntegerNode(12...13)(),
+               nil
+             )]
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "a"
+     ),
+     DefNode(15...49)(
+       (19...22),
+       nil,
+       ParametersNode(23...28)(
+         [RequiredParameterNode(23...28)(:raise)],
+         [],
+         [],
+         nil,
+         [],
+         nil,
+         nil
+       ),
+       StatementsNode(30...44)(
+         [CallNode(30...44)(
+            nil,
+            nil,
+            (30...35),
+            nil,
+            ArgumentsNode(36...44)(
+              [ConstantPathNode(36...40)(
+                 ConstantReadNode(36...37)(),
+                 ConstantReadNode(39...40)(),
+                 (37...39)
+               ),
+               StringNode(42...44)((42...43), (43...43), (43...44), "")]
+            ),
+            nil,
+            nil,
+            0,
+            "raise"
+          )]
+       ),
+       [:raise],
+       (15...18),
+       nil,
+       nil,
+       nil,
+       nil,
+       (46...49)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_12402.txt b/test/yarp/snapshots/whitequark/ruby_bug_12402.txt
new file mode 100644
index 0000000000..f68c8dc46b
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_12402.txt
@@ -0,0 +1,543 @@
+ProgramNode(0...437)(
+  [:foo],
+  StatementsNode(0...437)(
+    [LocalVariableOperatorWriteNode(0...27)(
+       (0...3),
+       (4...6),
+       CallNode(7...27)(
+         nil,
+         nil,
+         (7...12),
+         nil,
+         ArgumentsNode(13...27)(
+           [RescueModifierNode(13...27)(
+              CallNode(13...16)(
+                nil,
+                nil,
+                (13...16),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (17...23),
+              NilNode(24...27)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       ),
+       :foo,
+       :+
+     ),
+     LocalVariableOperatorWriteNode(29...57)(
+       (29...32),
+       (33...35),
+       RescueModifierNode(36...57)(
+         CallNode(36...46)(
+           nil,
+           nil,
+           (36...41),
+           (41...42),
+           ArgumentsNode(42...45)(
+             [CallNode(42...45)(
+                nil,
+                nil,
+                (42...45),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (45...46),
+           nil,
+           0,
+           "raise"
+         ),
+         (47...53),
+         NilNode(54...57)()
+       ),
+       :foo,
+       :+
+     ),
+     LocalVariableWriteNode(59...85)(
+       :foo,
+       0,
+       CallNode(65...85)(
+         nil,
+         nil,
+         (65...70),
+         nil,
+         ArgumentsNode(71...85)(
+           [RescueModifierNode(71...85)(
+              CallNode(71...74)(
+                nil,
+                nil,
+                (71...74),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (75...81),
+              NilNode(82...85)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       ),
+       (59...62),
+       (63...64)
+     ),
+     LocalVariableWriteNode(87...114)(
+       :foo,
+       0,
+       RescueModifierNode(93...114)(
+         CallNode(93...103)(
+           nil,
+           nil,
+           (93...98),
+           (98...99),
+           ArgumentsNode(99...102)(
+             [CallNode(99...102)(
+                nil,
+                nil,
+                (99...102),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (102...103),
+           nil,
+           0,
+           "raise"
+         ),
+         (104...110),
+         NilNode(111...114)()
+       ),
+       (87...90),
+       (91...92)
+     ),
+     CallOperatorWriteNode(116...145)(
+       CallNode(116...121)(
+         LocalVariableReadNode(116...119)(:foo, 0),
+         (119...120),
+         (120...121),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "C="
+       ),
+       (122...124),
+       CallNode(125...145)(
+         nil,
+         nil,
+         (125...130),
+         nil,
+         ArgumentsNode(131...145)(
+           [RescueModifierNode(131...145)(
+              CallNode(131...134)(
+                nil,
+                nil,
+                (131...134),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (135...141),
+              NilNode(142...145)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(147...177)(
+       CallNode(147...152)(
+         LocalVariableReadNode(147...150)(:foo, 0),
+         (150...151),
+         (151...152),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "C="
+       ),
+       (153...155),
+       RescueModifierNode(156...177)(
+         CallNode(156...166)(
+           nil,
+           nil,
+           (156...161),
+           (161...162),
+           ArgumentsNode(162...165)(
+             [CallNode(162...165)(
+                nil,
+                nil,
+                (162...165),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (165...166),
+           nil,
+           0,
+           "raise"
+         ),
+         (167...173),
+         NilNode(174...177)()
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(179...208)(
+       CallNode(179...184)(
+         LocalVariableReadNode(179...182)(:foo, 0),
+         (182...183),
+         (183...184),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "m="
+       ),
+       (185...187),
+       CallNode(188...208)(
+         nil,
+         nil,
+         (188...193),
+         nil,
+         ArgumentsNode(194...208)(
+           [RescueModifierNode(194...208)(
+              CallNode(194...197)(
+                nil,
+                nil,
+                (194...197),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (198...204),
+              NilNode(205...208)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(210...240)(
+       CallNode(210...215)(
+         LocalVariableReadNode(210...213)(:foo, 0),
+         (213...214),
+         (214...215),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "m="
+       ),
+       (216...218),
+       RescueModifierNode(219...240)(
+         CallNode(219...229)(
+           nil,
+           nil,
+           (219...224),
+           (224...225),
+           ArgumentsNode(225...228)(
+             [CallNode(225...228)(
+                nil,
+                nil,
+                (225...228),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (228...229),
+           nil,
+           0,
+           "raise"
+         ),
+         (230...236),
+         NilNode(237...240)()
+       ),
+       :+
+     ),
+     ConstantPathOperatorOrWriteNode(242...273)(
+       ConstantPathNode(242...248)(
+         LocalVariableReadNode(242...245)(:foo, 0),
+         ConstantReadNode(247...248)(),
+         (245...247)
+       ),
+       (249...252),
+       CallNode(253...273)(
+         nil,
+         nil,
+         (253...258),
+         nil,
+         ArgumentsNode(259...273)(
+           [RescueModifierNode(259...273)(
+              CallNode(259...262)(
+                nil,
+                nil,
+                (259...262),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (263...269),
+              NilNode(270...273)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       )
+     ),
+     ConstantPathOperatorOrWriteNode(275...307)(
+       ConstantPathNode(275...281)(
+         LocalVariableReadNode(275...278)(:foo, 0),
+         ConstantReadNode(280...281)(),
+         (278...280)
+       ),
+       (282...285),
+       RescueModifierNode(286...307)(
+         CallNode(286...296)(
+           nil,
+           nil,
+           (286...291),
+           (291...292),
+           ArgumentsNode(292...295)(
+             [CallNode(292...295)(
+                nil,
+                nil,
+                (292...295),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (295...296),
+           nil,
+           0,
+           "raise"
+         ),
+         (297...303),
+         NilNode(304...307)()
+       )
+     ),
+     CallOperatorWriteNode(309...339)(
+       CallNode(309...315)(
+         LocalVariableReadNode(309...312)(:foo, 0),
+         (312...314),
+         (314...315),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "m="
+       ),
+       (316...318),
+       CallNode(319...339)(
+         nil,
+         nil,
+         (319...324),
+         nil,
+         ArgumentsNode(325...339)(
+           [RescueModifierNode(325...339)(
+              CallNode(325...328)(
+                nil,
+                nil,
+                (325...328),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (329...335),
+              NilNode(336...339)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(341...372)(
+       CallNode(341...347)(
+         LocalVariableReadNode(341...344)(:foo, 0),
+         (344...346),
+         (346...347),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "m="
+       ),
+       (348...350),
+       RescueModifierNode(351...372)(
+         CallNode(351...361)(
+           nil,
+           nil,
+           (351...356),
+           (356...357),
+           ArgumentsNode(357...360)(
+             [CallNode(357...360)(
+                nil,
+                nil,
+                (357...360),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (360...361),
+           nil,
+           0,
+           "raise"
+         ),
+         (362...368),
+         NilNode(369...372)()
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(374...404)(
+       CallNode(374...380)(
+         LocalVariableReadNode(374...377)(:foo, 0),
+         nil,
+         (377...380),
+         (377...378),
+         ArgumentsNode(378...379)([IntegerNode(378...379)()]),
+         (379...380),
+         nil,
+         0,
+         "[]="
+       ),
+       (381...383),
+       CallNode(384...404)(
+         nil,
+         nil,
+         (384...389),
+         nil,
+         ArgumentsNode(390...404)(
+           [RescueModifierNode(390...404)(
+              CallNode(390...393)(
+                nil,
+                nil,
+                (390...393),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              ),
+              (394...400),
+              NilNode(401...404)()
+            )]
+         ),
+         nil,
+         nil,
+         0,
+         "raise"
+       ),
+       :+
+     ),
+     CallOperatorWriteNode(406...437)(
+       CallNode(406...412)(
+         LocalVariableReadNode(406...409)(:foo, 0),
+         nil,
+         (409...412),
+         (409...410),
+         ArgumentsNode(410...411)([IntegerNode(410...411)()]),
+         (411...412),
+         nil,
+         0,
+         "[]="
+       ),
+       (413...415),
+       RescueModifierNode(416...437)(
+         CallNode(416...426)(
+           nil,
+           nil,
+           (416...421),
+           (421...422),
+           ArgumentsNode(422...425)(
+             [CallNode(422...425)(
+                nil,
+                nil,
+                (422...425),
+                nil,
+                nil,
+                nil,
+                nil,
+                0,
+                "bar"
+              )]
+           ),
+           (425...426),
+           nil,
+           0,
+           "raise"
+         ),
+         (427...433),
+         NilNode(434...437)()
+       ),
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_12669.txt b/test/yarp/snapshots/whitequark/ruby_bug_12669.txt
new file mode 100644
index 0000000000..fc6b673c50
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_12669.txt
@@ -0,0 +1,105 @@
+ProgramNode(0...74)(
+  [:a, :b],
+  StatementsNode(0...74)(
+    [LocalVariableOperatorWriteNode(0...18)(
+       (0...1),
+       (2...4),
+       LocalVariableOperatorWriteNode(5...18)(
+         (5...6),
+         (7...9),
+         CallNode(10...18)(
+           nil,
+           nil,
+           (10...15),
+           nil,
+           ArgumentsNode(16...18)(
+             [SymbolNode(16...18)((16...17), (17...18), nil, "x")]
+           ),
+           nil,
+           nil,
+           0,
+           "raise"
+         ),
+         :b,
+         :+
+       ),
+       :a,
+       :+
+     ),
+     LocalVariableOperatorWriteNode(20...37)(
+       (20...21),
+       (22...24),
+       LocalVariableWriteNode(25...37)(
+         :b,
+         0,
+         CallNode(29...37)(
+           nil,
+           nil,
+           (29...34),
+           nil,
+           ArgumentsNode(35...37)(
+             [SymbolNode(35...37)((35...36), (36...37), nil, "x")]
+           ),
+           nil,
+           nil,
+           0,
+           "raise"
+         ),
+         (25...26),
+         (27...28)
+       ),
+       :a,
+       :+
+     ),
+     LocalVariableWriteNode(39...56)(
+       :a,
+       0,
+       LocalVariableOperatorWriteNode(43...56)(
+         (43...44),
+         (45...47),
+         CallNode(48...56)(
+           nil,
+           nil,
+           (48...53),
+           nil,
+           ArgumentsNode(54...56)(
+             [SymbolNode(54...56)((54...55), (55...56), nil, "x")]
+           ),
+           nil,
+           nil,
+           0,
+           "raise"
+         ),
+         :b,
+         :+
+       ),
+       (39...40),
+       (41...42)
+     ),
+     LocalVariableWriteNode(58...74)(
+       :a,
+       0,
+       LocalVariableWriteNode(62...74)(
+         :b,
+         0,
+         CallNode(66...74)(
+           nil,
+           nil,
+           (66...71),
+           nil,
+           ArgumentsNode(72...74)(
+             [SymbolNode(72...74)((72...73), (73...74), nil, "x")]
+           ),
+           nil,
+           nil,
+           0,
+           "raise"
+         ),
+         (62...63),
+         (64...65)
+       ),
+       (58...59),
+       (60...61)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_12686.txt b/test/yarp/snapshots/whitequark/ruby_bug_12686.txt
new file mode 100644
index 0000000000..6e23f38355
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_12686.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...16)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...16)(
+         [ParenthesesNode(2...16)(
+            StatementsNode(3...15)(
+              [RescueModifierNode(3...15)(
+                 CallNode(3...4)(
+                   nil,
+                   nil,
+                   (3...4),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "g"
+                 ),
+                 (5...11),
+                 NilNode(12...15)()
+               )]
+            ),
+            (2...3),
+            (15...16)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "f"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_13547.txt b/test/yarp/snapshots/whitequark/ruby_bug_13547.txt
new file mode 100644
index 0000000000..42592cfc6a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_13547.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       CallNode(0...4)(nil, nil, (0...4), nil, nil, nil, nil, 0, "meth"),
+       nil,
+       (4...6),
+       (4...5),
+       nil,
+       (5...6),
+       BlockNode(7...9)([], nil, nil, (7...8), (8...9)),
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_14690.txt b/test/yarp/snapshots/whitequark/ruby_bug_14690.txt
new file mode 100644
index 0000000000..65a6cb5737
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_14690.txt
@@ -0,0 +1,46 @@
+ProgramNode(0...23)(
+  [],
+  StatementsNode(0...23)(
+    [CallNode(0...23)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...6)([ParenthesesNode(4...6)(nil, (4...5), (5...6))]),
+       nil,
+       BlockNode(7...23)(
+         [],
+         nil,
+         StatementsNode(9...21)(
+           [CallNode(9...21)(
+              nil,
+              nil,
+              (9...10),
+              (10...11),
+              ArgumentsNode(11...12)(
+                [CallNode(11...12)(
+                   nil,
+                   nil,
+                   (11...12),
+                   nil,
+                   nil,
+                   nil,
+                   nil,
+                   0,
+                   "a"
+                 )]
+              ),
+              (12...13),
+              BlockNode(14...21)([], nil, nil, (14...16), (18...21)),
+              0,
+              "m"
+            )]
+         ),
+         (7...8),
+         (22...23)
+       ),
+       0,
+       "let"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_15789.txt b/test/yarp/snapshots/whitequark/ruby_bug_15789.txt
new file mode 100644
index 0000000000..705992927f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_15789.txt
@@ -0,0 +1,109 @@
+ProgramNode(0...41)(
+  [],
+  StatementsNode(0...41)(
+    [CallNode(0...20)(
+       nil,
+       nil,
+       (0...1),
+       nil,
+       ArgumentsNode(2...20)(
+         [LambdaNode(2...20)(
+            [:a],
+            (2...4),
+            BlockParametersNode(4...16)(
+              ParametersNode(5...15)(
+                [],
+                [OptionalParameterNode(5...15)(
+                   :a,
+                   (5...6),
+                   (7...8),
+                   LambdaNode(9...15)(
+                     [],
+                     (9...11),
+                     nil,
+                     StatementsNode(12...14)(
+                       [CallNode(12...14)(
+                          nil,
+                          nil,
+                          (12...14),
+                          nil,
+                          nil,
+                          nil,
+                          nil,
+                          0,
+                          "_1"
+                        )]
+                     )
+                   )
+                 )],
+                [],
+                nil,
+                [],
+                nil,
+                nil
+              ),
+              [],
+              (4...5),
+              (15...16)
+            ),
+            StatementsNode(18...19)([LocalVariableReadNode(18...19)(:a, 0)])
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "m"
+     ),
+     CallNode(22...41)(
+       nil,
+       nil,
+       (22...23),
+       nil,
+       ArgumentsNode(24...41)(
+         [LambdaNode(24...41)(
+            [:a],
+            (24...26),
+            BlockParametersNode(26...37)(
+              ParametersNode(27...36)(
+                [],
+                [],
+                [],
+                nil,
+                [KeywordParameterNode(27...36)(
+                   (27...29),
+                   LambdaNode(30...36)(
+                     [],
+                     (30...32),
+                     nil,
+                     StatementsNode(33...35)(
+                       [CallNode(33...35)(
+                          nil,
+                          nil,
+                          (33...35),
+                          nil,
+                          nil,
+                          nil,
+                          nil,
+                          0,
+                          "_1"
+                        )]
+                     )
+                   )
+                 )],
+                nil,
+                nil
+              ),
+              [],
+              (26...27),
+              (36...37)
+            ),
+            StatementsNode(39...40)([LocalVariableReadNode(39...40)(:a, 0)])
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "m"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ruby_bug_9669.txt b/test/yarp/snapshots/whitequark/ruby_bug_9669.txt
new file mode 100644
index 0000000000..3cdaf91407
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ruby_bug_9669.txt
@@ -0,0 +1,41 @@
+ProgramNode(0...33)(
+  [:o],
+  StatementsNode(0...33)(
+    [DefNode(0...19)(
+       (4...5),
+       nil,
+       ParametersNode(6...8)(
+         [],
+         [],
+         [],
+         nil,
+         [KeywordParameterNode(6...8)((6...8), nil)],
+         nil,
+         nil
+       ),
+       StatementsNode(9...15)([ReturnNode(9...15)((9...15), nil)]),
+       [:b],
+       (0...3),
+       nil,
+       nil,
+       nil,
+       nil,
+       (16...19)
+     ),
+     LocalVariableWriteNode(21...33)(
+       :o,
+       0,
+       HashNode(25...33)(
+         (25...26),
+         [AssocNode(27...31)(
+            SymbolNode(27...29)(nil, (27...28), (28...29), "a"),
+            IntegerNode(30...31)(),
+            nil
+          )],
+         (32...33)
+       ),
+       (21...22),
+       (23...24)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/sclass.txt b/test/yarp/snapshots/whitequark/sclass.txt
new file mode 100644
index 0000000000..1f032b1cf0
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/sclass.txt
@@ -0,0 +1,13 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [SingletonClassNode(0...22)(
+       [],
+       (0...5),
+       (6...8),
+       CallNode(9...12)(nil, nil, (9...12), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(14...17)([NilNode(14...17)()]),
+       (19...22)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/self.txt b/test/yarp/snapshots/whitequark/self.txt
new file mode 100644
index 0000000000..0002d6ee6d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/self.txt
@@ -0,0 +1 @@
+ProgramNode(0...4)([], StatementsNode(0...4)([SelfNode(0...4)()]))
diff --git a/test/yarp/snapshots/whitequark/send_attr_asgn.txt b/test/yarp/snapshots/whitequark/send_attr_asgn.txt
new file mode 100644
index 0000000000..a220143a97
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_attr_asgn.txt
@@ -0,0 +1,47 @@
+ProgramNode(0...44)(
+  [],
+  StatementsNode(0...44)(
+    [CallNode(0...9)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...4),
+       (4...5),
+       nil,
+       ArgumentsNode(8...9)([IntegerNode(8...9)()]),
+       nil,
+       nil,
+       0,
+       "A="
+     ),
+     CallNode(11...20)(
+       CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo"),
+       (14...15),
+       (15...16),
+       nil,
+       ArgumentsNode(19...20)([IntegerNode(19...20)()]),
+       nil,
+       nil,
+       0,
+       "a="
+     ),
+     ConstantPathWriteNode(22...32)(
+       ConstantPathNode(22...28)(
+         CallNode(22...25)(nil, nil, (22...25), nil, nil, nil, nil, 0, "foo"),
+         ConstantReadNode(27...28)(),
+         (25...27)
+       ),
+       (29...30),
+       IntegerNode(31...32)()
+     ),
+     CallNode(34...44)(
+       CallNode(34...37)(nil, nil, (34...37), nil, nil, nil, nil, 0, "foo"),
+       (37...39),
+       (39...40),
+       nil,
+       ArgumentsNode(43...44)([IntegerNode(43...44)()]),
+       nil,
+       nil,
+       0,
+       "a="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_attr_asgn_conditional.txt b/test/yarp/snapshots/whitequark/send_attr_asgn_conditional.txt
new file mode 100644
index 0000000000..fabbcb5ca7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_attr_asgn_conditional.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       ArgumentsNode(7...8)([IntegerNode(7...8)()]),
+       nil,
+       nil,
+       1,
+       "b="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_binary_op.txt b/test/yarp/snapshots/whitequark/send_binary_op.txt
new file mode 100644
index 0000000000..c8f2682cf1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_binary_op.txt
@@ -0,0 +1,336 @@
+ProgramNode(0...200)(
+  [],
+  StatementsNode(0...200)(
+    [CallNode(0...8)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (4...6),
+       nil,
+       ArgumentsNode(7...8)([IntegerNode(7...8)()]),
+       nil,
+       nil,
+       0,
+       "!="
+     ),
+     CallNode(10...18)(
+       CallNode(10...13)(nil, nil, (10...13), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (14...16),
+       nil,
+       ArgumentsNode(17...18)([IntegerNode(17...18)()]),
+       nil,
+       nil,
+       0,
+       "!~"
+     ),
+     CallNode(20...27)(
+       CallNode(20...23)(nil, nil, (20...23), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (24...25),
+       nil,
+       ArgumentsNode(26...27)([IntegerNode(26...27)()]),
+       nil,
+       nil,
+       0,
+       "%"
+     ),
+     CallNode(29...36)(
+       CallNode(29...32)(nil, nil, (29...32), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (33...34),
+       nil,
+       ArgumentsNode(35...36)([IntegerNode(35...36)()]),
+       nil,
+       nil,
+       0,
+       "&"
+     ),
+     CallNode(38...45)(
+       CallNode(38...41)(nil, nil, (38...41), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (42...43),
+       nil,
+       ArgumentsNode(44...45)([IntegerNode(44...45)()]),
+       nil,
+       nil,
+       0,
+       "*"
+     ),
+     CallNode(47...55)(
+       CallNode(47...50)(nil, nil, (47...50), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (51...53),
+       nil,
+       ArgumentsNode(54...55)([IntegerNode(54...55)()]),
+       nil,
+       nil,
+       0,
+       "**"
+     ),
+     CallNode(57...64)(
+       CallNode(57...60)(nil, nil, (57...60), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (61...62),
+       nil,
+       ArgumentsNode(63...64)([IntegerNode(63...64)()]),
+       nil,
+       nil,
+       0,
+       "+"
+     ),
+     CallNode(66...73)(
+       CallNode(66...69)(nil, nil, (66...69), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (70...71),
+       nil,
+       ArgumentsNode(72...73)([IntegerNode(72...73)()]),
+       nil,
+       nil,
+       0,
+       "-"
+     ),
+     CallNode(75...82)(
+       CallNode(75...78)(nil, nil, (75...78), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (79...80),
+       nil,
+       ArgumentsNode(81...82)([IntegerNode(81...82)()]),
+       nil,
+       nil,
+       0,
+       "/"
+     ),
+     CallNode(84...91)(
+       CallNode(84...87)(nil, nil, (84...87), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (88...89),
+       nil,
+       ArgumentsNode(90...91)([IntegerNode(90...91)()]),
+       nil,
+       nil,
+       0,
+       "<"
+     ),
+     CallNode(93...101)(
+       CallNode(93...96)(nil, nil, (93...96), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (97...99),
+       nil,
+       ArgumentsNode(100...101)([IntegerNode(100...101)()]),
+       nil,
+       nil,
+       0,
+       "<<"
+     ),
+     CallNode(103...111)(
+       CallNode(103...106)(
+         nil,
+         nil,
+         (103...106),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (107...109),
+       nil,
+       ArgumentsNode(110...111)([IntegerNode(110...111)()]),
+       nil,
+       nil,
+       0,
+       "<="
+     ),
+     CallNode(113...122)(
+       CallNode(113...116)(
+         nil,
+         nil,
+         (113...116),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (117...120),
+       nil,
+       ArgumentsNode(121...122)([IntegerNode(121...122)()]),
+       nil,
+       nil,
+       0,
+       "<=>"
+     ),
+     CallNode(124...132)(
+       CallNode(124...127)(
+         nil,
+         nil,
+         (124...127),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (128...130),
+       nil,
+       ArgumentsNode(131...132)([IntegerNode(131...132)()]),
+       nil,
+       nil,
+       0,
+       "=="
+     ),
+     CallNode(134...143)(
+       CallNode(134...137)(
+         nil,
+         nil,
+         (134...137),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (138...141),
+       nil,
+       ArgumentsNode(142...143)([IntegerNode(142...143)()]),
+       nil,
+       nil,
+       0,
+       "==="
+     ),
+     CallNode(145...153)(
+       CallNode(145...148)(
+         nil,
+         nil,
+         (145...148),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (149...151),
+       nil,
+       ArgumentsNode(152...153)([IntegerNode(152...153)()]),
+       nil,
+       nil,
+       0,
+       "=~"
+     ),
+     CallNode(155...162)(
+       CallNode(155...158)(
+         nil,
+         nil,
+         (155...158),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (159...160),
+       nil,
+       ArgumentsNode(161...162)([IntegerNode(161...162)()]),
+       nil,
+       nil,
+       0,
+       ">"
+     ),
+     CallNode(164...172)(
+       CallNode(164...167)(
+         nil,
+         nil,
+         (164...167),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (168...170),
+       nil,
+       ArgumentsNode(171...172)([IntegerNode(171...172)()]),
+       nil,
+       nil,
+       0,
+       ">="
+     ),
+     CallNode(174...182)(
+       CallNode(174...177)(
+         nil,
+         nil,
+         (174...177),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (178...180),
+       nil,
+       ArgumentsNode(181...182)([IntegerNode(181...182)()]),
+       nil,
+       nil,
+       0,
+       ">>"
+     ),
+     CallNode(184...191)(
+       CallNode(184...187)(
+         nil,
+         nil,
+         (184...187),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (188...189),
+       nil,
+       ArgumentsNode(190...191)([IntegerNode(190...191)()]),
+       nil,
+       nil,
+       0,
+       "^"
+     ),
+     CallNode(193...200)(
+       CallNode(193...196)(
+         nil,
+         nil,
+         (193...196),
+         nil,
+         nil,
+         nil,
+         nil,
+         0,
+         "foo"
+       ),
+       nil,
+       (197...198),
+       nil,
+       ArgumentsNode(199...200)([IntegerNode(199...200)()]),
+       nil,
+       nil,
+       0,
+       "|"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_block_chain_cmd.txt b/test/yarp/snapshots/whitequark/send_block_chain_cmd.txt
new file mode 100644
index 0000000000..15e364b829
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_block_chain_cmd.txt
@@ -0,0 +1,194 @@
+ProgramNode(0...173)(
+  [],
+  StatementsNode(0...173)(
+    [CallNode(0...21)(
+       CallNode(0...13)(
+         nil,
+         nil,
+         (0...4),
+         nil,
+         ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+         nil,
+         BlockNode(7...13)([], nil, nil, (7...9), (10...13)),
+         0,
+         "meth"
+       ),
+       (13...14),
+       (14...17),
+       nil,
+       ArgumentsNode(18...21)(
+         [CallNode(18...21)(nil, nil, (18...21), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "fun"
+     ),
+     CallNode(23...51)(
+       CallNode(23...36)(
+         nil,
+         nil,
+         (23...27),
+         nil,
+         ArgumentsNode(28...29)([IntegerNode(28...29)()]),
+         nil,
+         BlockNode(30...36)([], nil, nil, (30...32), (33...36)),
+         0,
+         "meth"
+       ),
+       (36...37),
+       (37...40),
+       nil,
+       ArgumentsNode(41...44)(
+         [CallNode(41...44)(nil, nil, (41...44), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       BlockNode(45...51)([], nil, nil, (45...47), (48...51)),
+       0,
+       "fun"
+     ),
+     CallNode(53...73)(
+       CallNode(53...66)(
+         nil,
+         nil,
+         (53...57),
+         nil,
+         ArgumentsNode(58...59)([IntegerNode(58...59)()]),
+         nil,
+         BlockNode(60...66)([], nil, nil, (60...62), (63...66)),
+         0,
+         "meth"
+       ),
+       (66...67),
+       (67...70),
+       nil,
+       nil,
+       nil,
+       BlockNode(71...73)([], nil, nil, (71...72), (72...73)),
+       0,
+       "fun"
+     ),
+     CallNode(75...97)(
+       CallNode(75...88)(
+         nil,
+         nil,
+         (75...79),
+         nil,
+         ArgumentsNode(80...81)([IntegerNode(80...81)()]),
+         nil,
+         BlockNode(82...88)([], nil, nil, (82...84), (85...88)),
+         0,
+         "meth"
+       ),
+       (88...89),
+       (89...92),
+       (92...93),
+       ArgumentsNode(93...96)(
+         [CallNode(93...96)(nil, nil, (93...96), nil, nil, nil, nil, 0, "bar")]
+       ),
+       (96...97),
+       nil,
+       0,
+       "fun"
+     ),
+     CallNode(99...124)(
+       CallNode(99...112)(
+         nil,
+         nil,
+         (99...103),
+         nil,
+         ArgumentsNode(104...105)([IntegerNode(104...105)()]),
+         nil,
+         BlockNode(106...112)([], nil, nil, (106...108), (109...112)),
+         0,
+         "meth"
+       ),
+       (112...113),
+       (113...116),
+       (116...117),
+       ArgumentsNode(117...120)(
+         [CallNode(117...120)(
+            nil,
+            nil,
+            (117...120),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       (120...121),
+       BlockNode(122...124)([], nil, nil, (122...123), (123...124)),
+       0,
+       "fun"
+     ),
+     CallNode(126...148)(
+       CallNode(126...139)(
+         nil,
+         nil,
+         (126...130),
+         nil,
+         ArgumentsNode(131...132)([IntegerNode(131...132)()]),
+         nil,
+         BlockNode(133...139)([], nil, nil, (133...135), (136...139)),
+         0,
+         "meth"
+       ),
+       (139...141),
+       (145...148),
+       nil,
+       ArgumentsNode(145...148)(
+         [CallNode(145...148)(
+            nil,
+            nil,
+            (145...148),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "bar"
+     ),
+     CallNode(150...173)(
+       CallNode(150...163)(
+         nil,
+         nil,
+         (150...154),
+         nil,
+         ArgumentsNode(155...156)([IntegerNode(155...156)()]),
+         nil,
+         BlockNode(157...163)([], nil, nil, (157...159), (160...163)),
+         0,
+         "meth"
+       ),
+       (163...165),
+       (172...173),
+       (168...169),
+       ArgumentsNode(169...172)(
+         [CallNode(169...172)(
+            nil,
+            nil,
+            (169...172),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       (172...173),
+       nil,
+       0,
+       ")"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_block_conditional.txt b/test/yarp/snapshots/whitequark/send_block_conditional.txt
new file mode 100644
index 0000000000..a25fb4ac4e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_block_conditional.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...5),
+       (5...8),
+       nil,
+       nil,
+       nil,
+       BlockNode(9...11)([], nil, nil, (9...10), (10...11)),
+       1,
+       "bar"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_call.txt b/test/yarp/snapshots/whitequark/send_call.txt
new file mode 100644
index 0000000000..6c52bec0fe
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_call.txt
@@ -0,0 +1,27 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...7)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...4),
+       (0...0),
+       (4...5),
+       ArgumentsNode(5...6)([IntegerNode(5...6)()]),
+       (6...7),
+       nil,
+       0,
+       "call"
+     ),
+     CallNode(9...17)(
+       CallNode(9...12)(nil, nil, (9...12), nil, nil, nil, nil, 0, "foo"),
+       (12...14),
+       (0...0),
+       (14...15),
+       ArgumentsNode(15...16)([IntegerNode(15...16)()]),
+       (16...17),
+       nil,
+       0,
+       "call"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_conditional.txt b/test/yarp/snapshots/whitequark/send_conditional.txt
new file mode 100644
index 0000000000..1621715838
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_conditional.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...4)(
+  [],
+  StatementsNode(0...4)(
+    [CallNode(0...4)(
+       CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+       (1...3),
+       (3...4),
+       nil,
+       nil,
+       nil,
+       nil,
+       1,
+       "b"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_index.txt b/test/yarp/snapshots/whitequark/send_index.txt
new file mode 100644
index 0000000000..f09270736f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_index.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (3...9),
+       (3...4),
+       ArgumentsNode(4...8)([IntegerNode(4...5)(), IntegerNode(7...8)()]),
+       (8...9),
+       nil,
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_index_asgn.txt b/test/yarp/snapshots/whitequark/send_index_asgn.txt
new file mode 100644
index 0000000000..d6cfd22a29
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_index_asgn.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (3...9),
+       (3...4),
+       ArgumentsNode(4...13)(
+         [IntegerNode(4...5)(), IntegerNode(7...8)(), IntegerNode(12...13)()]
+       ),
+       (8...9),
+       nil,
+       0,
+       "[]="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_index_asgn_legacy.txt b/test/yarp/snapshots/whitequark/send_index_asgn_legacy.txt
new file mode 100644
index 0000000000..d6cfd22a29
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_index_asgn_legacy.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...13)(
+  [],
+  StatementsNode(0...13)(
+    [CallNode(0...13)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (3...9),
+       (3...4),
+       ArgumentsNode(4...13)(
+         [IntegerNode(4...5)(), IntegerNode(7...8)(), IntegerNode(12...13)()]
+       ),
+       (8...9),
+       nil,
+       0,
+       "[]="
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_index_cmd.txt b/test/yarp/snapshots/whitequark/send_index_cmd.txt
new file mode 100644
index 0000000000..cf98204073
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_index_cmd.txt
@@ -0,0 +1,40 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallNode(0...10)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (3...10),
+       (3...4),
+       ArgumentsNode(4...9)(
+         [CallNode(4...9)(
+            nil,
+            nil,
+            (4...5),
+            nil,
+            ArgumentsNode(6...9)(
+              [CallNode(6...9)(
+                 nil,
+                 nil,
+                 (6...9),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "bar"
+               )]
+            ),
+            nil,
+            nil,
+            0,
+            "m"
+          )]
+       ),
+       (9...10),
+       nil,
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_index_legacy.txt b/test/yarp/snapshots/whitequark/send_index_legacy.txt
new file mode 100644
index 0000000000..f09270736f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_index_legacy.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (3...9),
+       (3...4),
+       ArgumentsNode(4...8)([IntegerNode(4...5)(), IntegerNode(7...8)()]),
+       (8...9),
+       nil,
+       0,
+       "[]"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_lambda.txt b/test/yarp/snapshots/whitequark/send_lambda.txt
new file mode 100644
index 0000000000..3c9f4f56cb
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_lambda.txt
@@ -0,0 +1,26 @@
+ProgramNode(0...26)(
+  [],
+  StatementsNode(0...26)(
+    [LambdaNode(0...8)(
+       [:*],
+       (0...2),
+       BlockParametersNode(3...4)(
+         ParametersNode(3...4)(
+           [],
+           [],
+           [],
+           RestParameterNode(3...4)((3...4), nil),
+           [],
+           nil,
+           nil
+         ),
+         [],
+         nil,
+         nil
+       ),
+       nil
+     ),
+     LambdaNode(10...19)([], (10...12), nil, nil),
+     LambdaNode(21...26)([], (21...23), nil, nil)]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_lambda_args.txt b/test/yarp/snapshots/whitequark/send_lambda_args.txt
new file mode 100644
index 0000000000..f904384781
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_lambda_args.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...21)(
+  [],
+  StatementsNode(0...21)(
+    [LambdaNode(0...10)(
+       [:a],
+       (0...2),
+       BlockParametersNode(3...6)(
+         ParametersNode(4...5)(
+           [RequiredParameterNode(4...5)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (3...4),
+         (5...6)
+       ),
+       nil
+     ),
+     LambdaNode(12...21)(
+       [:a],
+       (12...14),
+       BlockParametersNode(14...17)(
+         ParametersNode(15...16)(
+           [RequiredParameterNode(15...16)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [],
+         (14...15),
+         (16...17)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_lambda_args_noparen.txt b/test/yarp/snapshots/whitequark/send_lambda_args_noparen.txt
new file mode 100644
index 0000000000..8767cf48fa
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_lambda_args_noparen.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...22)(
+  [],
+  StatementsNode(0...22)(
+    [LambdaNode(0...11)(
+       [:a],
+       (0...2),
+       BlockParametersNode(3...7)(
+         ParametersNode(3...7)(
+           [],
+           [],
+           [],
+           nil,
+           [KeywordParameterNode(3...7)((3...5), IntegerNode(6...7)())],
+           nil,
+           nil
+         ),
+         [],
+         nil,
+         nil
+       ),
+       nil
+     ),
+     LambdaNode(13...22)(
+       [:a],
+       (13...15),
+       BlockParametersNode(16...18)(
+         ParametersNode(16...18)(
+           [],
+           [],
+           [],
+           nil,
+           [KeywordParameterNode(16...18)((16...18), nil)],
+           nil,
+           nil
+         ),
+         [],
+         nil,
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_lambda_args_shadow.txt b/test/yarp/snapshots/whitequark/send_lambda_args_shadow.txt
new file mode 100644
index 0000000000..a2e92a67dc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_lambda_args_shadow.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...19)(
+  [],
+  StatementsNode(0...19)(
+    [LambdaNode(0...19)(
+       [:a, :foo, :bar],
+       (0...2),
+       BlockParametersNode(2...15)(
+         ParametersNode(3...4)(
+           [RequiredParameterNode(3...4)(:a)],
+           [],
+           [],
+           nil,
+           [],
+           nil,
+           nil
+         ),
+         [(6...9), (11...14)],
+         (2...3),
+         (14...15)
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_lambda_legacy.txt b/test/yarp/snapshots/whitequark/send_lambda_legacy.txt
new file mode 100644
index 0000000000..fdc30c30dc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_lambda_legacy.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)([LambdaNode(0...5)([], (0...2), nil, nil)])
+)
diff --git a/test/yarp/snapshots/whitequark/send_op_asgn_conditional.txt b/test/yarp/snapshots/whitequark/send_op_asgn_conditional.txt
new file mode 100644
index 0000000000..db30a2a0ee
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_op_asgn_conditional.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...10)(
+  [],
+  StatementsNode(0...10)(
+    [CallOperatorAndWriteNode(0...10)(
+       CallNode(0...4)(
+         CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
+         (1...3),
+         (3...4),
+         nil,
+         nil,
+         nil,
+         nil,
+         1,
+         "b="
+       ),
+       (5...8),
+       IntegerNode(9...10)()
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_plain.txt b/test/yarp/snapshots/whitequark/send_plain.txt
new file mode 100644
index 0000000000..892e30696c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_plain.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...29)(
+  [],
+  StatementsNode(0...29)(
+    [CallNode(0...7)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...4),
+       (4...7),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "fun"
+     ),
+     CallNode(9...19)(
+       CallNode(9...12)(nil, nil, (9...12), nil, nil, nil, nil, 0, "foo"),
+       (12...14),
+       (14...17),
+       (17...18),
+       nil,
+       (18...19),
+       nil,
+       0,
+       "Fun"
+     ),
+     CallNode(21...29)(
+       CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "foo"),
+       (24...26),
+       (26...29),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_plain_cmd.txt b/test/yarp/snapshots/whitequark/send_plain_cmd.txt
new file mode 100644
index 0000000000..0b13828cb4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_plain_cmd.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...39)(
+  [],
+  StatementsNode(0...39)(
+    [CallNode(0...11)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...4),
+       (4...7),
+       nil,
+       ArgumentsNode(8...11)(
+         [CallNode(8...11)(nil, nil, (8...11), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "fun"
+     ),
+     CallNode(13...25)(
+       CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo"),
+       (16...18),
+       (18...21),
+       nil,
+       ArgumentsNode(22...25)(
+         [CallNode(22...25)(nil, nil, (22...25), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "Fun"
+     ),
+     CallNode(27...39)(
+       CallNode(27...30)(nil, nil, (27...30), nil, nil, nil, nil, 0, "foo"),
+       (30...32),
+       (36...39),
+       nil,
+       ArgumentsNode(36...39)(
+         [CallNode(36...39)(nil, nil, (36...39), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil,
+       0,
+       "bar"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_self.txt b/test/yarp/snapshots/whitequark/send_self.txt
new file mode 100644
index 0000000000..e12291d277
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_self.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...17)(
+  [],
+  StatementsNode(0...17)(
+    [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "fun"),
+     CallNode(5...9)(nil, nil, (5...9), nil, nil, nil, nil, 0, "fun!"),
+     CallNode(11...17)(
+       nil,
+       nil,
+       (11...14),
+       (14...15),
+       ArgumentsNode(15...16)([IntegerNode(15...16)()]),
+       (16...17),
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_self_block.txt b/test/yarp/snapshots/whitequark/send_self_block.txt
new file mode 100644
index 0000000000..1ae9968e74
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_self_block.txt
@@ -0,0 +1,49 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [CallNode(0...10)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       nil,
+       nil,
+       BlockNode(4...10)([], nil, nil, (4...6), (7...10)),
+       0,
+       "fun"
+     ),
+     CallNode(12...19)(
+       nil,
+       nil,
+       (12...15),
+       nil,
+       nil,
+       nil,
+       BlockNode(16...19)([], nil, nil, (16...17), (18...19)),
+       0,
+       "fun"
+     ),
+     CallNode(21...30)(
+       nil,
+       nil,
+       (21...24),
+       (24...25),
+       nil,
+       (25...26),
+       BlockNode(27...30)([], nil, nil, (27...28), (29...30)),
+       0,
+       "fun"
+     ),
+     CallNode(32...42)(
+       nil,
+       nil,
+       (32...35),
+       (35...36),
+       ArgumentsNode(36...37)([IntegerNode(36...37)()]),
+       (37...38),
+       BlockNode(39...42)([], nil, nil, (39...40), (41...42)),
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/send_unary_op.txt b/test/yarp/snapshots/whitequark/send_unary_op.txt
new file mode 100644
index 0000000000..6e1a3315b9
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/send_unary_op.txt
@@ -0,0 +1,38 @@
+ProgramNode(0...16)(
+  [],
+  StatementsNode(0...16)(
+    [CallNode(0...4)(
+       CallNode(1...4)(nil, nil, (1...4), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (0...1),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "+@"
+     ),
+     CallNode(6...10)(
+       CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (6...7),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     CallNode(12...16)(
+       CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo"),
+       nil,
+       (12...13),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "~"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/slash_newline_in_heredocs.txt b/test/yarp/snapshots/whitequark/slash_newline_in_heredocs.txt
new file mode 100644
index 0000000000..facffc7a2a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/slash_newline_in_heredocs.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...56)(
+  [],
+  StatementsNode(0...56)(
+    [InterpolatedStringNode(0...27)(
+       (0...4),
+       [StringNode(5...25)(
+          nil,
+          (5...25),
+          nil,
+          "    1 \n" + "    2\n" + "    3\n"
+        )],
+       (25...27)
+     ),
+     InterpolatedStringNode(29...56)(
+       (29...33),
+       [StringNode(34...54)(nil, (34...54), nil, "1 \n" + "2\n" + "3\n")],
+       (54...56)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/space_args_arg.txt b/test/yarp/snapshots/whitequark/space_args_arg.txt
new file mode 100644
index 0000000000..d1dfcc4f65
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/space_args_arg.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...7)(
+  [],
+  StatementsNode(0...7)(
+    [CallNode(0...7)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...7)(
+         [ParenthesesNode(4...7)(
+            StatementsNode(5...6)([IntegerNode(5...6)()]),
+            (4...5),
+            (6...7)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/space_args_arg_block.txt b/test/yarp/snapshots/whitequark/space_args_arg_block.txt
new file mode 100644
index 0000000000..4ac9d1d7e4
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/space_args_arg_block.txt
@@ -0,0 +1,56 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [CallNode(0...14)(
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       (3...4),
+       (4...7),
+       nil,
+       ArgumentsNode(8...11)(
+         [ParenthesesNode(8...11)(
+            StatementsNode(9...10)([IntegerNode(9...10)()]),
+            (8...9),
+            (10...11)
+          )]
+       ),
+       nil,
+       BlockNode(12...14)([], nil, nil, (12...13), (13...14)),
+       0,
+       "fun"
+     ),
+     CallNode(16...31)(
+       CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "foo"),
+       (19...21),
+       (30...31),
+       nil,
+       ArgumentsNode(25...28)(
+         [ParenthesesNode(25...28)(
+            StatementsNode(26...27)([IntegerNode(26...27)()]),
+            (25...26),
+            (27...28)
+          )]
+       ),
+       nil,
+       BlockNode(29...31)([], nil, nil, (29...30), (30...31)),
+       0,
+       "}"
+     ),
+     CallNode(33...43)(
+       nil,
+       nil,
+       (33...36),
+       nil,
+       ArgumentsNode(37...40)(
+         [ParenthesesNode(37...40)(
+            StatementsNode(38...39)([IntegerNode(38...39)()]),
+            (37...38),
+            (39...40)
+          )]
+       ),
+       nil,
+       BlockNode(41...43)([], nil, nil, (41...42), (42...43)),
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/space_args_arg_call.txt b/test/yarp/snapshots/whitequark/space_args_arg_call.txt
new file mode 100644
index 0000000000..01bc1dbde3
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/space_args_arg_call.txt
@@ -0,0 +1,32 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [CallNode(0...12)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...12)(
+         [CallNode(4...12)(
+            ParenthesesNode(4...7)(
+              StatementsNode(5...6)([IntegerNode(5...6)()]),
+              (4...5),
+              (6...7)
+            ),
+            (7...8),
+            (8...12),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "to_i"
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/space_args_arg_newline.txt b/test/yarp/snapshots/whitequark/space_args_arg_newline.txt
new file mode 100644
index 0000000000..36e321ad7c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/space_args_arg_newline.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [CallNode(0...8)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...8)(
+         [ParenthesesNode(4...8)(
+            StatementsNode(5...6)([IntegerNode(5...6)()]),
+            (4...5),
+            (7...8)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/space_args_block.txt b/test/yarp/snapshots/whitequark/space_args_block.txt
new file mode 100644
index 0000000000..7895ad2606
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/space_args_block.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...9)(
+  [],
+  StatementsNode(0...9)(
+    [CallNode(0...9)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...6)([ParenthesesNode(4...6)(nil, (4...5), (5...6))]),
+       nil,
+       BlockNode(7...9)([], nil, nil, (7...8), (8...9)),
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/space_args_cmd.txt b/test/yarp/snapshots/whitequark/space_args_cmd.txt
new file mode 100644
index 0000000000..289ef54f8c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/space_args_cmd.txt
@@ -0,0 +1,46 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [CallNode(0...11)(
+       nil,
+       nil,
+       (0...3),
+       nil,
+       ArgumentsNode(4...11)(
+         [ParenthesesNode(4...11)(
+            StatementsNode(5...10)(
+              [CallNode(5...10)(
+                 nil,
+                 nil,
+                 (5...6),
+                 nil,
+                 ArgumentsNode(7...10)(
+                   [CallNode(7...10)(
+                      nil,
+                      nil,
+                      (7...10),
+                      nil,
+                      nil,
+                      nil,
+                      nil,
+                      0,
+                      "bar"
+                    )]
+                 ),
+                 nil,
+                 nil,
+                 0,
+                 "f"
+               )]
+            ),
+            (4...5),
+            (10...11)
+          )]
+       ),
+       nil,
+       nil,
+       0,
+       "fun"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/string___FILE__.txt b/test/yarp/snapshots/whitequark/string___FILE__.txt
new file mode 100644
index 0000000000..31d5437b21
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/string___FILE__.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [SourceFileNode(0...8)("/fixtures/whitequark/string___FILE__.txt")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/string_concat.txt b/test/yarp/snapshots/whitequark/string_concat.txt
new file mode 100644
index 0000000000..c20f4ac35e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/string_concat.txt
@@ -0,0 +1,17 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [StringConcatNode(0...14)(
+       InterpolatedStringNode(0...8)(
+         (0...1),
+         [StringNode(1...4)(nil, (1...4), nil, "foo"),
+          EmbeddedVariableNode(4...7)(
+            (4...5),
+            InstanceVariableReadNode(5...7)()
+          )],
+         (7...8)
+       ),
+       StringNode(9...14)((9...10), (10...13), (13...14), "bar")
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/string_dvar.txt b/test/yarp/snapshots/whitequark/string_dvar.txt
new file mode 100644
index 0000000000..c89e359565
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/string_dvar.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedStringNode(0...14)(
+       (0...1),
+       [EmbeddedVariableNode(1...4)(
+          (1...2),
+          InstanceVariableReadNode(2...4)()
+        ),
+        StringNode(4...5)(nil, (4...5), nil, " "),
+        EmbeddedVariableNode(5...9)((5...6), ClassVariableReadNode(6...9)()),
+        StringNode(9...10)(nil, (9...10), nil, " "),
+        EmbeddedVariableNode(10...13)(
+          (10...11),
+          GlobalVariableReadNode(11...13)()
+        )],
+       (13...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/string_interp.txt b/test/yarp/snapshots/whitequark/string_interp.txt
new file mode 100644
index 0000000000..20a4555ae2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/string_interp.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedStringNode(0...14)(
+       (0...1),
+       [StringNode(1...4)(nil, (1...4), nil, "foo"),
+        EmbeddedStatementsNode(4...10)(
+          (4...6),
+          StatementsNode(6...9)(
+            [CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "bar")]
+          ),
+          (9...10)
+        ),
+        StringNode(10...13)(nil, (10...13), nil, "baz")],
+       (13...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/string_plain.txt b/test/yarp/snapshots/whitequark/string_plain.txt
new file mode 100644
index 0000000000..fe0822a568
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/string_plain.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...20)(
+  [],
+  StatementsNode(0...20)(
+    [StringNode(0...10)((0...3), (3...9), (9...10), "foobar"),
+     StringNode(12...20)((12...13), (13...19), (19...20), "foobar")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/super.txt b/test/yarp/snapshots/whitequark/super.txt
new file mode 100644
index 0000000000..0724119add
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/super.txt
@@ -0,0 +1,24 @@
+ProgramNode(0...30)(
+  [],
+  StatementsNode(0...30)(
+    [SuperNode(0...9)(
+       (0...5),
+       nil,
+       ArgumentsNode(6...9)(
+         [CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "foo")]
+       ),
+       nil,
+       nil
+     ),
+     SuperNode(11...18)((11...16), (16...17), nil, (17...18), nil),
+     SuperNode(20...30)(
+       (20...25),
+       (25...26),
+       ArgumentsNode(26...29)(
+         [CallNode(26...29)(nil, nil, (26...29), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (29...30),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/super_block.txt b/test/yarp/snapshots/whitequark/super_block.txt
new file mode 100644
index 0000000000..e2af525f24
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/super_block.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...35)(
+  [],
+  StatementsNode(0...35)(
+    [ForwardingSuperNode(0...12)(
+       BlockNode(6...12)([], nil, nil, (6...8), (9...12))
+     ),
+     SuperNode(14...35)(
+       (14...19),
+       nil,
+       ArgumentsNode(20...28)(
+         [CallNode(20...23)(nil, nil, (20...23), nil, nil, nil, nil, 0, "foo"),
+          CallNode(25...28)(nil, nil, (25...28), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       BlockNode(29...35)([], nil, nil, (29...31), (32...35))
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/symbol_interp.txt b/test/yarp/snapshots/whitequark/symbol_interp.txt
new file mode 100644
index 0000000000..cc6da96739
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/symbol_interp.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...15)(
+  [],
+  StatementsNode(0...15)(
+    [InterpolatedSymbolNode(0...15)(
+       (0...2),
+       [StringNode(2...5)(nil, (2...5), nil, "foo"),
+        EmbeddedStatementsNode(5...11)(
+          (5...7),
+          StatementsNode(7...10)(
+            [CallNode(7...10)(
+               nil,
+               nil,
+               (7...10),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          ),
+          (10...11)
+        ),
+        StringNode(11...14)(nil, (11...14), nil, "baz")],
+       (14...15)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/symbol_plain.txt b/test/yarp/snapshots/whitequark/symbol_plain.txt
new file mode 100644
index 0000000000..7cbac4e19d
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/symbol_plain.txt
@@ -0,0 +1,7 @@
+ProgramNode(0...12)(
+  [],
+  StatementsNode(0...12)(
+    [SymbolNode(0...6)((0...2), (2...5), (5...6), "foo"),
+     SymbolNode(8...12)((8...9), (9...12), nil, "foo")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ternary.txt b/test/yarp/snapshots/whitequark/ternary.txt
new file mode 100644
index 0000000000..58bccdd8be
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ternary.txt
@@ -0,0 +1,16 @@
+ProgramNode(0...11)(
+  [],
+  StatementsNode(0...11)(
+    [IfNode(0...11)(
+       nil,
+       CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(6...7)([IntegerNode(6...7)()]),
+       ElseNode(8...11)(
+         (8...9),
+         StatementsNode(10...11)([IntegerNode(10...11)()]),
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/ternary_ambiguous_symbol.txt b/test/yarp/snapshots/whitequark/ternary_ambiguous_symbol.txt
new file mode 100644
index 0000000000..012b77a3d2
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/ternary_ambiguous_symbol.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...13)(
+  [:t],
+  StatementsNode(0...13)(
+    [LocalVariableWriteNode(0...3)(
+       :t,
+       0,
+       IntegerNode(2...3)(),
+       (0...1),
+       (1...2)
+     ),
+     IfNode(4...13)(
+       nil,
+       ParenthesesNode(4...9)(
+         StatementsNode(5...8)(
+           [CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo")]
+         ),
+         (4...5),
+         (8...9)
+       ),
+       StatementsNode(10...11)([LocalVariableReadNode(10...11)(:t, 0)]),
+       ElseNode(11...13)(
+         (11...12),
+         StatementsNode(12...13)([ConstantReadNode(12...13)()]),
+         nil
+       ),
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/trailing_forward_arg.txt b/test/yarp/snapshots/whitequark/trailing_forward_arg.txt
new file mode 100644
index 0000000000..61f29acca5
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/trailing_forward_arg.txt
@@ -0,0 +1,43 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [DefNode(0...40)(
+       (4...7),
+       nil,
+       ParametersNode(8...17)(
+         [RequiredParameterNode(8...9)(:a),
+          RequiredParameterNode(11...12)(:b)],
+         [],
+         [],
+         nil,
+         [],
+         ForwardingParameterNode(14...17)(),
+         nil
+       ),
+       StatementsNode(20...35)(
+         [CallNode(20...35)(
+            nil,
+            nil,
+            (20...23),
+            (23...24),
+            ArgumentsNode(24...34)(
+              [LocalVariableReadNode(24...25)(:a, 0),
+               IntegerNode(27...29)(),
+               ForwardingArgumentsNode(31...34)()]
+            ),
+            (34...35),
+            nil,
+            0,
+            "bar"
+          )]
+       ),
+       [:a, :b, :"..."],
+       (0...3),
+       nil,
+       (7...8),
+       (17...18),
+       nil,
+       (37...40)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/true.txt b/test/yarp/snapshots/whitequark/true.txt
new file mode 100644
index 0000000000..14b0c8cecc
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/true.txt
@@ -0,0 +1 @@
+ProgramNode(0...4)([], StatementsNode(0...4)([TrueNode(0...4)()]))
diff --git a/test/yarp/snapshots/whitequark/unary_num_pow_precedence.txt b/test/yarp/snapshots/whitequark/unary_num_pow_precedence.txt
new file mode 100644
index 0000000000..319b29b170
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/unary_num_pow_precedence.txt
@@ -0,0 +1,58 @@
+ProgramNode(0...32)(
+  [],
+  StatementsNode(0...32)(
+    [CallNode(0...10)(
+       FloatNode(0...4)(),
+       nil,
+       (5...7),
+       nil,
+       ArgumentsNode(8...10)([IntegerNode(8...10)()]),
+       nil,
+       nil,
+       0,
+       "**"
+     ),
+     CallNode(12...20)(
+       CallNode(13...20)(
+         IntegerNode(13...14)(),
+         nil,
+         (15...17),
+         nil,
+         ArgumentsNode(18...20)([IntegerNode(18...20)()]),
+         nil,
+         nil,
+         0,
+         "**"
+       ),
+       nil,
+       (12...13),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     ),
+     CallNode(22...32)(
+       CallNode(23...32)(
+         FloatNode(23...26)(),
+         nil,
+         (27...29),
+         nil,
+         ArgumentsNode(30...32)([IntegerNode(30...32)()]),
+         nil,
+         nil,
+         0,
+         "**"
+       ),
+       nil,
+       (22...23),
+       nil,
+       nil,
+       nil,
+       nil,
+       0,
+       "-@"
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/undef.txt b/test/yarp/snapshots/whitequark/undef.txt
new file mode 100644
index 0000000000..eb253762b3
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/undef.txt
@@ -0,0 +1,20 @@
+ProgramNode(0...27)(
+  [],
+  StatementsNode(0...27)(
+    [UndefNode(0...27)(
+       [SymbolNode(6...9)(nil, (6...9), nil, "foo"),
+        SymbolNode(11...15)((11...12), (12...15), nil, "bar"),
+        InterpolatedSymbolNode(17...27)(
+          (17...19),
+          [StringNode(19...22)(nil, (19...22), nil, "foo"),
+           EmbeddedStatementsNode(22...26)(
+             (22...24),
+             StatementsNode(24...25)([IntegerNode(24...25)()]),
+             (25...26)
+           )],
+          (26...27)
+        )],
+       (0...5)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/unless.txt b/test/yarp/snapshots/whitequark/unless.txt
new file mode 100644
index 0000000000..291a636f99
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/unless.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...46)(
+  [],
+  StatementsNode(0...46)(
+    [UnlessNode(0...24)(
+       (0...6),
+       CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(16...19)(
+         [CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       (21...24)
+     ),
+     UnlessNode(26...46)(
+       (26...32),
+       CallNode(33...36)(nil, nil, (33...36), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(38...41)(
+         [CallNode(38...41)(nil, nil, (38...41), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       (43...46)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/unless_else.txt b/test/yarp/snapshots/whitequark/unless_else.txt
new file mode 100644
index 0000000000..a3564a0c29
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/unless_else.txt
@@ -0,0 +1,55 @@
+ProgramNode(0...66)(
+  [],
+  StatementsNode(0...66)(
+    [UnlessNode(0...34)(
+       (0...6),
+       CallNode(7...10)(nil, nil, (7...10), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(16...19)(
+         [CallNode(16...19)(nil, nil, (16...19), nil, nil, nil, nil, 0, "bar")]
+       ),
+       ElseNode(21...34)(
+         (21...25),
+         StatementsNode(26...29)(
+           [CallNode(26...29)(
+              nil,
+              nil,
+              (26...29),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (31...34)
+       ),
+       (31...34)
+     ),
+     UnlessNode(36...66)(
+       (36...42),
+       CallNode(43...46)(nil, nil, (43...46), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(48...51)(
+         [CallNode(48...51)(nil, nil, (48...51), nil, nil, nil, nil, 0, "bar")]
+       ),
+       ElseNode(53...66)(
+         (53...57),
+         StatementsNode(58...61)(
+           [CallNode(58...61)(
+              nil,
+              nil,
+              (58...61),
+              nil,
+              nil,
+              nil,
+              nil,
+              0,
+              "baz"
+            )]
+         ),
+         (63...66)
+       ),
+       (63...66)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/unless_mod.txt b/test/yarp/snapshots/whitequark/unless_mod.txt
new file mode 100644
index 0000000000..37e4f48881
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/unless_mod.txt
@@ -0,0 +1,14 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [UnlessNode(0...14)(
+       (4...10),
+       CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(0...3)(
+         [CallNode(0...3)(nil, nil, (0...3), nil, nil, nil, nil, 0, "bar")]
+       ),
+       nil,
+       nil
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/until.txt b/test/yarp/snapshots/whitequark/until.txt
new file mode 100644
index 0000000000..46632a6734
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/until.txt
@@ -0,0 +1,39 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [UntilNode(0...21)(
+       (0...5),
+       CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(13...17)(
+         [CallNode(13...17)(
+            nil,
+            nil,
+            (13...17),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "meth"
+          )]
+       )
+     ),
+     UntilNode(23...42)(
+       (23...28),
+       CallNode(29...32)(nil, nil, (29...32), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(34...38)(
+         [CallNode(34...38)(
+            nil,
+            nil,
+            (34...38),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "meth"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/until_mod.txt b/test/yarp/snapshots/whitequark/until_mod.txt
new file mode 100644
index 0000000000..604dc3d9ec
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/until_mod.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [UntilNode(0...14)(
+       (5...10),
+       CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(0...4)(
+         [CallNode(0...4)(nil, nil, (0...4), nil, nil, nil, nil, 0, "meth")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/until_post.txt b/test/yarp/snapshots/whitequark/until_post.txt
new file mode 100644
index 0000000000..0c2a28ab5c
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/until_post.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [UntilNode(0...24)(
+       (15...20),
+       CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(0...14)(
+         [BeginNode(0...14)(
+            (0...5),
+            StatementsNode(6...10)(
+              [CallNode(6...10)(
+                 nil,
+                 nil,
+                 (6...10),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "meth"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (11...14)
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/var_and_asgn.txt b/test/yarp/snapshots/whitequark/var_and_asgn.txt
new file mode 100644
index 0000000000..76469d6b93
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/var_and_asgn.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...7)(
+  [:a],
+  StatementsNode(0...7)(
+    [LocalVariableOperatorAndWriteNode(0...7)(
+       (0...1),
+       (2...5),
+       IntegerNode(6...7)(),
+       :a
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/var_op_asgn.txt b/test/yarp/snapshots/whitequark/var_op_asgn.txt
new file mode 100644
index 0000000000..2bc8667b6a
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/var_op_asgn.txt
@@ -0,0 +1,44 @@
+ProgramNode(0...53)(
+  [:a],
+  StatementsNode(0...53)(
+    [ClassVariableOperatorWriteNode(0...11)(
+       (0...5),
+       (6...8),
+       IntegerNode(9...11)(),
+       :|
+     ),
+     InstanceVariableOperatorWriteNode(13...20)(
+       (13...15),
+       (16...18),
+       IntegerNode(19...20)(),
+       :|
+     ),
+     LocalVariableOperatorWriteNode(22...28)(
+       (22...23),
+       (24...26),
+       IntegerNode(27...28)(),
+       :a,
+       :+
+     ),
+     DefNode(30...53)(
+       (34...35),
+       nil,
+       nil,
+       StatementsNode(37...48)(
+         [ClassVariableOperatorWriteNode(37...48)(
+            (37...42),
+            (43...45),
+            IntegerNode(46...48)(),
+            :|
+          )]
+       ),
+       [],
+       (30...33),
+       nil,
+       nil,
+       nil,
+       nil,
+       (50...53)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/var_op_asgn_cmd.txt b/test/yarp/snapshots/whitequark/var_op_asgn_cmd.txt
new file mode 100644
index 0000000000..4ef661f2fd
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/var_op_asgn_cmd.txt
@@ -0,0 +1,22 @@
+ProgramNode(0...12)(
+  [:foo],
+  StatementsNode(0...12)(
+    [LocalVariableOperatorWriteNode(0...12)(
+       (0...3),
+       (4...6),
+       CallNode(7...12)(
+         nil,
+         nil,
+         (7...8),
+         nil,
+         ArgumentsNode(9...12)([LocalVariableReadNode(9...12)(:foo, 0)]),
+         nil,
+         nil,
+         0,
+         "m"
+       ),
+       :foo,
+       :+
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/var_or_asgn.txt b/test/yarp/snapshots/whitequark/var_or_asgn.txt
new file mode 100644
index 0000000000..39cc823867
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/var_or_asgn.txt
@@ -0,0 +1,11 @@
+ProgramNode(0...7)(
+  [:a],
+  StatementsNode(0...7)(
+    [LocalVariableOperatorOrWriteNode(0...7)(
+       (0...1),
+       (2...5),
+       IntegerNode(6...7)(),
+       :a
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/when_multi.txt b/test/yarp/snapshots/whitequark/when_multi.txt
new file mode 100644
index 0000000000..d81232ad20
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/when_multi.txt
@@ -0,0 +1,29 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [CaseNode(0...37)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [WhenNode(10...32)(
+          (10...14),
+          [StringNode(15...20)((15...16), (16...19), (19...20), "bar"),
+           StringNode(22...27)((22...23), (23...26), (26...27), "baz")],
+          StatementsNode(29...32)(
+            [CallNode(29...32)(
+               nil,
+               nil,
+               (29...32),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          )
+        )],
+       nil,
+       (0...4),
+       (34...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/when_splat.txt b/test/yarp/snapshots/whitequark/when_splat.txt
new file mode 100644
index 0000000000..428ea20d6e
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/when_splat.txt
@@ -0,0 +1,60 @@
+ProgramNode(0...43)(
+  [],
+  StatementsNode(0...43)(
+    [CaseNode(0...43)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [WhenNode(10...27)(
+          (10...14),
+          [IntegerNode(15...16)(),
+           SplatNode(18...22)(
+             (18...19),
+             CallNode(19...22)(
+               nil,
+               nil,
+               (19...22),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "baz"
+             )
+           )],
+          StatementsNode(24...27)(
+            [CallNode(24...27)(
+               nil,
+               nil,
+               (24...27),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          )
+        ),
+        WhenNode(29...38)(
+          (29...33),
+          [SplatNode(34...38)(
+             (34...35),
+             CallNode(35...38)(
+               nil,
+               nil,
+               (35...38),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "foo"
+             )
+           )],
+          nil
+        )],
+       nil,
+       (0...4),
+       (40...43)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/when_then.txt b/test/yarp/snapshots/whitequark/when_then.txt
new file mode 100644
index 0000000000..3880028b7f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/when_then.txt
@@ -0,0 +1,28 @@
+ProgramNode(0...34)(
+  [],
+  StatementsNode(0...34)(
+    [CaseNode(0...34)(
+       CallNode(5...8)(nil, nil, (5...8), nil, nil, nil, nil, 0, "foo"),
+       [WhenNode(10...29)(
+          (10...14),
+          [StringNode(15...20)((15...16), (16...19), (19...20), "bar")],
+          StatementsNode(26...29)(
+            [CallNode(26...29)(
+               nil,
+               nil,
+               (26...29),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          )
+        )],
+       nil,
+       (0...4),
+       (31...34)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/while.txt b/test/yarp/snapshots/whitequark/while.txt
new file mode 100644
index 0000000000..9cd21ff154
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/while.txt
@@ -0,0 +1,39 @@
+ProgramNode(0...42)(
+  [],
+  StatementsNode(0...42)(
+    [WhileNode(0...21)(
+       (0...5),
+       CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(13...17)(
+         [CallNode(13...17)(
+            nil,
+            nil,
+            (13...17),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "meth"
+          )]
+       )
+     ),
+     WhileNode(23...42)(
+       (23...28),
+       CallNode(29...32)(nil, nil, (29...32), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(34...38)(
+         [CallNode(34...38)(
+            nil,
+            nil,
+            (34...38),
+            nil,
+            nil,
+            nil,
+            nil,
+            0,
+            "meth"
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/while_mod.txt b/test/yarp/snapshots/whitequark/while_mod.txt
new file mode 100644
index 0000000000..b39baf15c1
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/while_mod.txt
@@ -0,0 +1,12 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [WhileNode(0...14)(
+       (5...10),
+       CallNode(11...14)(nil, nil, (11...14), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(0...4)(
+         [CallNode(0...4)(nil, nil, (0...4), nil, nil, nil, nil, 0, "meth")]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/while_post.txt b/test/yarp/snapshots/whitequark/while_post.txt
new file mode 100644
index 0000000000..94adefedc7
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/while_post.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...24)(
+  [],
+  StatementsNode(0...24)(
+    [WhileNode(0...24)(
+       (15...20),
+       CallNode(21...24)(nil, nil, (21...24), nil, nil, nil, nil, 0, "foo"),
+       StatementsNode(0...14)(
+         [BeginNode(0...14)(
+            (0...5),
+            StatementsNode(6...10)(
+              [CallNode(6...10)(
+                 nil,
+                 nil,
+                 (6...10),
+                 nil,
+                 nil,
+                 nil,
+                 nil,
+                 0,
+                 "meth"
+               )]
+            ),
+            nil,
+            nil,
+            nil,
+            (11...14)
+          )]
+       )
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/xstring_interp.txt b/test/yarp/snapshots/whitequark/xstring_interp.txt
new file mode 100644
index 0000000000..0b7c91cf7f
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/xstring_interp.txt
@@ -0,0 +1,18 @@
+ProgramNode(0...14)(
+  [],
+  StatementsNode(0...14)(
+    [InterpolatedXStringNode(0...14)(
+       (0...1),
+       [StringNode(1...4)(nil, (1...4), nil, "foo"),
+        EmbeddedStatementsNode(4...10)(
+          (4...6),
+          StatementsNode(6...9)(
+            [CallNode(6...9)(nil, nil, (6...9), nil, nil, nil, nil, 0, "bar")]
+          ),
+          (9...10)
+        ),
+        StringNode(10...13)(nil, (10...13), nil, "baz")],
+       (13...14)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/xstring_plain.txt b/test/yarp/snapshots/whitequark/xstring_plain.txt
new file mode 100644
index 0000000000..61515d89d9
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/xstring_plain.txt
@@ -0,0 +1,6 @@
+ProgramNode(0...8)(
+  [],
+  StatementsNode(0...8)(
+    [XStringNode(0...8)((0...1), (1...7), (7...8), "foobar")]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/yield.txt b/test/yarp/snapshots/whitequark/yield.txt
new file mode 100644
index 0000000000..89b53914b6
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/yield.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...37)(
+  [],
+  StatementsNode(0...37)(
+    [YieldNode(0...5)((0...5), nil, nil, nil),
+     YieldNode(7...16)(
+       (7...12),
+       nil,
+       ArgumentsNode(13...16)(
+         [CallNode(13...16)(nil, nil, (13...16), nil, nil, nil, nil, 0, "foo")]
+       ),
+       nil
+     ),
+     YieldNode(18...25)((18...23), (23...24), nil, (24...25)),
+     YieldNode(27...37)(
+       (27...32),
+       (32...33),
+       ArgumentsNode(33...36)(
+         [CallNode(33...36)(nil, nil, (33...36), nil, nil, nil, nil, 0, "foo")]
+       ),
+       (36...37)
+     )]
+  )
+)
diff --git a/test/yarp/snapshots/whitequark/zsuper.txt b/test/yarp/snapshots/whitequark/zsuper.txt
new file mode 100644
index 0000000000..b9f92d0055
--- /dev/null
+++ b/test/yarp/snapshots/whitequark/zsuper.txt
@@ -0,0 +1,4 @@
+ProgramNode(0...5)(
+  [],
+  StatementsNode(0...5)([ForwardingSuperNode(0...5)(nil)])
+)
diff --git a/test/yarp/snapshots/xstring.txt b/test/yarp/snapshots/xstring.txt
new file mode 100644
index 0000000000..5bc0e9be56
--- /dev/null
+++ b/test/yarp/snapshots/xstring.txt
@@ -0,0 +1,31 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [XStringNode(0...7)((0...3), (3...6), (6...7), "foo"),
+     InterpolatedXStringNode(9...25)(
+       (9...10),
+       [StringNode(10...14)(nil, (10...14), nil, "foo "),
+        EmbeddedStatementsNode(14...20)(
+          (14...16),
+          StatementsNode(16...19)(
+            [CallNode(16...19)(
+               nil,
+               nil,
+               (16...19),
+               nil,
+               nil,
+               nil,
+               nil,
+               0,
+               "bar"
+             )]
+          ),
+          (19...20)
+        ),
+        StringNode(20...24)(nil, (20...24), nil, " baz")],
+       (24...25)
+     ),
+     XStringNode(27...33)((27...28), (28...32), (32...33), "foo"),
+     XStringNode(35...40)((35...36), (36...39), (39...40), "foo")]
+  )
+)
diff --git a/test/yarp/snapshots/yield.txt b/test/yarp/snapshots/yield.txt
new file mode 100644
index 0000000000..9dba03e7b7
--- /dev/null
+++ b/test/yarp/snapshots/yield.txt
@@ -0,0 +1,23 @@
+ProgramNode(0...40)(
+  [],
+  StatementsNode(0...40)(
+    [YieldNode(0...5)((0...5), nil, nil, nil),
+     YieldNode(7...14)((7...12), (12...13), nil, (13...14)),
+     YieldNode(16...24)(
+       (16...21),
+       (21...22),
+       ArgumentsNode(22...23)([IntegerNode(22...23)()]),
+       (23...24)
+     ),
+     YieldNode(26...40)(
+       (26...31),
+       (31...32),
+       ArgumentsNode(32...39)(
+         [IntegerNode(32...33)(),
+          IntegerNode(35...36)(),
+          IntegerNode(38...39)()]
+       ),
+       (39...40)
+     )]
+  )
+)
diff --git a/test/yarp/unescape_test.rb b/test/yarp/unescape_test.rb
new file mode 100644
index 0000000000..314e59aa6a
--- /dev/null
+++ b/test/yarp/unescape_test.rb
@@ -0,0 +1,152 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+module UnescapeTest
+  class UnescapeNoneTest < Test::Unit::TestCase
+    def test_backslash
+      assert_unescape_none("\\")
+    end
+
+    def test_single_quote
+      assert_unescape_none("'")
+    end
+
+    private
+
+    def assert_unescape_none(source)
+      assert_equal(source, YARP.unescape_none(source))
+    end
+  end
+
+  class UnescapeMinimalTest < Test::Unit::TestCase
+    def test_backslash
+      assert_unescape_minimal("\\", "\\\\")
+    end
+
+    def test_single_quote
+      assert_unescape_minimal("'", "\\'")
+    end
+
+    def test_single_char
+      assert_unescape_minimal("\\a", "\\a")
+    end
+
+    private
+
+    def assert_unescape_minimal(expected, source)
+      assert_equal(expected, YARP.unescape_minimal(source))
+    end
+  end
+
+  class UnescapeAllTest < Test::Unit::TestCase
+    def test_backslash
+      assert_unescape_all("\\", "\\\\")
+    end
+
+    def test_single_quote
+      assert_unescape_all("'", "\\'")
+    end
+
+    def test_single_char
+      assert_unescape_all("\a", "\\a")
+      assert_unescape_all("\b", "\\b")
+      assert_unescape_all("\e", "\\e")
+      assert_unescape_all("\f", "\\f")
+      assert_unescape_all("\n", "\\n")
+      assert_unescape_all("\r", "\\r")
+      assert_unescape_all("\s", "\\s")
+      assert_unescape_all("\t", "\\t")
+      assert_unescape_all("\v", "\\v")
+    end
+
+    def test_octal
+      assert_unescape_all("\a", "\\7")
+      assert_unescape_all("#", "\\43")
+      assert_unescape_all("a", "\\141")
+    end
+
+    def test_hexadecimal
+      assert_unescape_all("\a", "\\x7")
+      assert_unescape_all("#", "\\x23")
+      assert_unescape_all("a", "\\x61")
+    end
+
+    def test_deletes
+      assert_unescape_all("\x7f", "\\c?")
+      assert_unescape_all("\x7f", "\\C-?")
+    end
+
+    def test_unicode_codepoint
+      assert_unescape_all("a", "\\u0061")
+      assert_unescape_all("Ā", "\\u0100", "UTF-8")
+      assert_unescape_all("က", "\\u1000", "UTF-8")
+      assert_unescape_all("တ", "\\u1010", "UTF-8")
+
+      assert_nil(YARP.unescape_all("\\uxxxx"))
+    end
+
+    def test_unicode_codepoints
+      assert_unescape_all("a", "\\u{61}")
+      assert_unescape_all("Ā", "\\u{0100}", "UTF-8")
+      assert_unescape_all("က", "\\u{1000}", "UTF-8")
+      assert_unescape_all("တ", "\\u{1010}", "UTF-8")
+      assert_unescape_all("𐀀", "\\u{10000}", "UTF-8")
+      assert_unescape_all("𐀐", "\\u{10010}", "UTF-8")
+      assert_unescape_all("aĀကတ𐀀𐀐", "\\u{ 61\s100\n1000\t1010\r10000\v10010 }", "UTF-8")
+
+      assert_nil(YARP.unescape_all("\\u{110000}"))
+      assert_nil(YARP.unescape_all("\\u{110000 110001 110002}"))
+    end
+
+    def test_control_characters
+      each_printable do |chr|
+        byte = eval("\"\\c#{chr}\"").bytes.first
+        assert_unescape_all(byte.chr, "\\c#{chr}")
+
+        byte = eval("\"\\C-#{chr}\"").bytes.first
+        assert_unescape_all(byte.chr, "\\C-#{chr}")
+      end
+    end
+
+    def test_meta_characters
+      each_printable do |chr|
+        byte = eval("\"\\M-#{chr}\"").bytes.first
+        assert_unescape_all(byte.chr, "\\M-#{chr}")
+      end
+    end
+
+    def test_meta_control_characters
+      each_printable do |chr|
+        byte = eval("\"\\M-\\c#{chr}\"").bytes.first
+        assert_unescape_all(byte.chr, "\\M-\\c#{chr}")
+
+        byte = eval("\"\\M-\\C-#{chr}\"").bytes.first
+        assert_unescape_all(byte.chr, "\\M-\\C-#{chr}")
+
+        byte = eval("\"\\c\\M-#{chr}\"").bytes.first
+        assert_unescape_all(byte.chr, "\\c\\M-#{chr}")
+      end
+    end
+
+    def test_escaping_normal_characters
+      assert_unescape_all("d", "\\d")
+      assert_unescape_all("g", "\\g")
+    end
+
+    private
+
+    def assert_unescape_all(expected, source, forced_encoding = nil)
+      result = YARP.unescape_all(source)
+      result.force_encoding(forced_encoding) if forced_encoding
+      assert_equal(expected, result)
+    end
+
+    def each_printable
+      (1..127).each do |ord|
+        chr = ord.chr
+        yield chr if chr.match?(/[[:print:]]/) && chr != " " && chr != "\\"
+      end
+    end
+  end
+end
diff --git a/test/yarp/version_test.rb b/test/yarp/version_test.rb
new file mode 100644
index 0000000000..f431157ae9
--- /dev/null
+++ b/test/yarp/version_test.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+require "yarp_test_helper"
+
+class VersionTest < Test::Unit::TestCase
+  def test_version_is_set
+    refute_nil YARP::VERSION
+  end
+end
diff --git a/test/yarp/yarp_test_helper.rb b/test/yarp/yarp_test_helper.rb
new file mode 100644
index 0000000000..666bc337c7
--- /dev/null
+++ b/test/yarp/yarp_test_helper.rb
@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+require "yarp"
+require "ripper"
+require "pp"
+require "test/unit"
+require "tempfile"
+
+module YARP
+  module Assertions
+    private
+
+    def assert_equal_nodes(expected, actual, compare_location: true, parent: nil)
+      assert_equal expected.class, actual.class
+
+      case expected
+      when Array
+        assert_equal(
+          expected.size,
+          actual.size,
+          -> { "Arrays were different sizes. Parent: #{parent.pretty_inspect}" }
+        )
+
+        expected.zip(actual).each do |(expected_element, actual_element)|
+          assert_equal_nodes(
+            expected_element,
+            actual_element,
+            compare_location: compare_location,
+            parent: actual
+          )
+        end
+      when YARP::SourceFileNode
+        deconstructed_expected = expected.deconstruct_keys(nil)
+        deconstructed_actual = actual.deconstruct_keys(nil)
+        assert_equal deconstructed_expected.keys, deconstructed_actual.keys
+
+        # Filepaths can be different if test suites were run
+        # on different machines.
+        # We accommodate for this by comparing the basenames,
+        # and not the absolute filepaths
+        assert_equal deconstructed_expected.except(:filepath), deconstructed_actual.except(:filepath)
+        assert_equal File.basename(deconstructed_expected[:filepath]), File.basename(deconstructed_actual[:filepath])
+      when YARP::Node
+        deconstructed_expected = expected.deconstruct_keys(nil)
+        deconstructed_actual = actual.deconstruct_keys(nil)
+        assert_equal deconstructed_expected.keys, deconstructed_actual.keys
+
+        deconstructed_expected.each_key do |key|
+          assert_equal_nodes(
+            deconstructed_expected[key],
+            deconstructed_actual[key],
+            compare_location: compare_location,
+            parent: actual
+          )
+        end
+      when YARP::Location
+        assert_operator actual.start_offset, :<=, actual.end_offset, -> {
+          "start_offset > end_offset for #{actual.inspect}, parent is #{parent.pretty_inspect}"
+        }
+        if compare_location
+          assert_equal(
+            expected.start_offset,
+            actual.start_offset,
+            -> { "Start locations were different. Parent: #{parent.pretty_inspect}" }
+          )
+
+          assert_equal(
+            expected.end_offset,
+            actual.end_offset,
+            -> { "End locations were different. Parent: #{parent.pretty_inspect}" }
+          )
+
+        end
+      else
+        assert_equal expected, actual
+      end
+    end
+
+    def assert_valid_locations(value, parent: nil)
+      case value
+      when Array
+        value.each do |element|
+          assert_valid_locations(element, parent: value)
+        end
+      when YARP::Node
+        value.deconstruct_keys(nil).each_value do |field|
+          assert_valid_locations(field, parent: value)
+        end
+      when YARP::Location
+        assert_operator value.start_offset, :<=, value.end_offset, -> {
+          "start_offset > end_offset for #{value.inspect}, parent is #{parent.pretty_inspect}"
+        }
+      end
+    end
+  end
+end
+
+Test::Unit::TestCase.include(YARP::Assertions)