[ruby/prism] Rebase against main

https://github.com/ruby/prism/commit/813e20d449

2 files changed, 1 insertions, 209 deletions

diff --git a/lib/prism/parse_result.rb b/lib/prism/parse_result.rb
index af4006d683..102567f59c 100644
--- a/lib/prism/parse_result.rb
+++ b/lib/prism/parse_result.rb
@@ -67,7 +67,7 @@ module Prism
     # concept of code units that differs from the number of characters in other
     # encodings, it is not captured here.
     def code_units_offset(byte_offset, encoding)
-      byteslice = source.byteslice(0, byte_offset).encode(encoding)
+      byteslice = (source.byteslice(0, byte_offset) or raise).encode(encoding)
       (encoding == Encoding::UTF_16LE || encoding == Encoding::UTF_16BE) ? (byteslice.bytesize / 2) : byteslice.length
     end
 
diff --git a/lib/prism/ripper_compat.rb b/lib/prism/ripper_compat.rb
deleted file mode 100644
index 51b4339426..0000000000
--- a/lib/prism/ripper_compat.rb
+++ /dev/null
@@ -1,208 +0,0 @@
-# frozen_string_literal: true
-
-require "ripper"
-
-module Prism
-  # Note: This integration is not finished, and therefore still has many
-  # inconsistencies with Ripper. If you'd like to help out, pull requests would
-  # be greatly appreciated!
-  #
-  # This class is meant to provide a compatibility layer between prism and
-  # Ripper. It functions by parsing the entire tree first and then walking it
-  # and executing each of the Ripper callbacks as it goes.
-  #
-  # This class is going to necessarily be slower than the native Ripper API. It
-  # is meant as a stopgap until developers migrate to using prism. It is also
-  # meant as a test harness for the prism parser.
-  #
-  # To use this class, you treat `Prism::RipperCompat` effectively as you would
-  # treat the `Ripper` class.
-  class RipperCompat < Visitor
-    # This class mirrors the ::Ripper::SexpBuilder subclass of ::Ripper that
-    # returns the arrays of [type, *children].
-    class SexpBuilder < RipperCompat
-      private
-
-      Ripper::PARSER_EVENTS.each do |event|
-        define_method(:"on_#{event}") do |*args|
-          [event, *args]
-        end
-      end
-
-      Ripper::SCANNER_EVENTS.each do |event|
-        define_method(:"on_#{event}") do |value|
-          [:"@#{event}", value, [lineno, column]]
-        end
-      end
-    end
-
-    # This class mirrors the ::Ripper::SexpBuilderPP subclass of ::Ripper that
-    # returns the same values as ::Ripper::SexpBuilder except with a couple of
-    # niceties that flatten linked lists into arrays.
-    class SexpBuilderPP < SexpBuilder
-      private
-
-      def _dispatch_event_new # :nodoc:
-        []
-      end
-
-      def _dispatch_event_push(list, item) # :nodoc:
-        list << item
-        list
-      end
-
-      Ripper::PARSER_EVENT_TABLE.each do |event, arity|
-        case event
-        when /_new\z/
-          alias_method :"on_#{event}", :_dispatch_event_new if arity == 0
-        when /_add\z/
-          alias_method :"on_#{event}", :_dispatch_event_push
-        end
-      end
-    end
-
-    # The source that is being parsed.
-    attr_reader :source
-
-    # The current line number of the parser.
-    attr_reader :lineno
-
-    # The current column number of the parser.
-    attr_reader :column
-
-    # Create a new RipperCompat object with the given source.
-    def initialize(source)
-      @source = source
-      @result = nil
-      @lineno = nil
-      @column = nil
-    end
-
-    ############################################################################
-    # Public interface
-    ############################################################################
-
-    # True if the parser encountered an error during parsing.
-    def error?
-      result.failure?
-    end
-
-    # Parse the source and return the result.
-    def parse
-      result.magic_comments.each do |magic_comment|
-        on_magic_comment(magic_comment.key, magic_comment.value)
-      end
-
-      if error?
-        result.errors.each do |error|
-          on_parse_error(error.message)
-        end
-      else
-        result.value.accept(self)
-      end
-    end
-
-    ############################################################################
-    # Visitor methods
-    ############################################################################
-
-    # Visit a CallNode node.
-    def visit_call_node(node)
-      message = node.message
-      if message && !message.match?(/^[[:alpha:]_]/) && node.opening_loc.nil? && node.arguments && node.arguments.arguments && node.arguments.arguments.length == 1
-        left = visit(node.receiver)
-        right = visit(node.arguments.arguments.first)
-
-        bounds(node.location)
-        on_binary(left, node.name, right)
-      else
-        raise NotImplementedError
-      end
-    end
-
-    # Visit a FloatNode node.
-    def visit_float_node(node)
-      bounds(node.location)
-      on_float(node.slice)
-    end
-
-    # Visit a ImaginaryNode node.
-    def visit_imaginary_node(node)
-      bounds(node.location)
-      on_imaginary(node.slice)
-    end
-
-    # Visit an IntegerNode node.
-    def visit_integer_node(node)
-      bounds(node.location)
-      on_int(node.slice)
-    end
-
-    # Visit a RationalNode node.
-    def visit_rational_node(node)
-      bounds(node.location)
-      on_rational(node.slice)
-    end
-
-    # Visit a StatementsNode node.
-    def visit_statements_node(node)
-      bounds(node.location)
-      node.body.inject(on_stmts_new) do |stmts, stmt|
-        on_stmts_add(stmts, visit(stmt))
-      end
-    end
-
-    # Visit a ProgramNode node.
-    def visit_program_node(node)
-      statements = visit(node.statements)
-      bounds(node.location)
-      on_program(statements)
-    end
-
-    ############################################################################
-    # Entrypoints for subclasses
-    ############################################################################
-
-    # This is a convenience method that runs the SexpBuilder subclass parser.
-    def self.sexp_raw(source)
-      SexpBuilder.new(source).parse
-    end
-
-    # This is a convenience method that runs the SexpBuilderPP subclass parser.
-    def self.sexp(source)
-      SexpBuilderPP.new(source).parse
-    end
-
-    private
-
-    # This method is responsible for updating lineno and column information
-    # to reflect the current node.
-    #
-    # This method could be drastically improved with some caching on the start
-    # of every line, but for now it's good enough.
-    def bounds(location)
-      @lineno = location.start_line
-      @column = location.start_column
-    end
-
-    # Lazily initialize the parse result.
-    def result
-      @result ||= Prism.parse(source)
-    end
-
-    def _dispatch0; end # :nodoc:
-    def _dispatch1(_); end # :nodoc:
-    def _dispatch2(_, _); end # :nodoc:
-    def _dispatch3(_, _, _); end # :nodoc:
-    def _dispatch4(_, _, _, _); end # :nodoc:
-    def _dispatch5(_, _, _, _, _); end # :nodoc:
-    def _dispatch7(_, _, _, _, _, _, _); end # :nodoc:
-
-    alias_method :on_parse_error, :_dispatch1
-    alias_method :on_magic_comment, :_dispatch2
-
-    (Ripper::SCANNER_EVENT_TABLE.merge(Ripper::PARSER_EVENT_TABLE)).each do |event, arity|
-      alias_method :"on_#{event}", :"_dispatch#{arity}"
-    end
-  end
-end