Revert "Don't echo results of assignment expressions"

This reverts commit 1ee88c51b3c319b74b69540e111e4a1c24833cad.

3 files changed, 1 insertions, 63 deletions

diff --git a/lib/irb.rb b/lib/irb.rb
index a41d4e1..a08aa87 100644
--- a/lib/irb.rb
+++ b/lib/irb.rb
@@ -10,7 +10,6 @@
 #
 #
 require "e2mmap"
-require "ripper"
 
 require "irb/init"
 require "irb/context"
@@ -411,35 +410,6 @@ module IRB
   end
 
   class Irb
-    ASSIGNMENT_NODE_TYPES = [
-      # Local, instance, global, class, constant, instance, and index assignment:
-      #   "foo = bar",
-      #   "@foo = bar",
-      #   "$foo = bar",
-      #   "@@foo = bar",
-      #   "::Foo = bar",
-      #   "a::Foo = bar",
-      #   "Foo = bar"
-      #   "foo.bar = 1"
-      #   "foo[1] = bar"
-      :assign,
-
-      # Operation assignment:
-      #   "foo += bar"
-      #   "foo -= bar"
-      #   "foo ||= bar"
-      #   "foo &&= bar"
-      :opassign,
-
-      # Multiple assignment:
-      #   "foo, bar = 1, 2
-      :massign,
-    ]
-    # Note: instance and index assignment expressions could also be written like:
-    # "foo.bar=(1)" and "foo.[]=(1, bar)", when expressed that way, the former
-    # be parsed as :assign and echo will be suppressed, but the latter is
-    # parsed as a :method_add_arg and the output won't be suppressed
-
     # Creates a new irb session
     def initialize(workspace = nil, input_method = nil, output_method = nil)
       @context = Context.new(self, workspace, input_method, output_method)
@@ -528,7 +498,7 @@ module IRB
           begin
             line.untaint
             @context.evaluate(line, line_no, exception: exc)
-            output_value if @context.echo? && (@context.echo_on_assignment? || !assignment_expression?(line))
+            output_value if @context.echo?
           rescue Interrupt => exc
           rescue SystemExit, SignalException
             raise
@@ -747,18 +717,6 @@ module IRB
       format("#<%s: %s>", self.class, ary.join(", "))
     end
 
-    def assignment_expression?(line)
-      # Try to parse the line and check if the last of possibly multiple
-      # expressions is an assignment type.
-
-      # If the expression is invalid, Ripper.sexp should return nil which will
-      # result in false being returned. Any valid expression should return an
-      # s-expression where the second selement of the top level array is an
-      # array of parsed expressions. The first element of each expression is the
-      # expression's type.
-      ASSIGNMENT_NODE_TYPES.include?(Ripper.sexp(line)&.dig(1,-1,0))
-    end
-
     ATTR_TTY = "\e[%sm"
     def ATTR_TTY.[](*a) self % a.join(";"); end
     ATTR_PLAIN = ""
diff --git a/lib/irb/context.rb b/lib/irb/context.rb
index 5d23360..9544a8a 100644
--- a/lib/irb/context.rb
+++ b/lib/irb/context.rb
@@ -121,11 +121,6 @@ module IRB
       if @echo.nil?
         @echo = true
       end
-
-      @echo_on_assignment = IRB.conf[:ECHO_ON_ASSIGNMENT]
-      if @echo_on_assignment.nil?
-        @echo_on_assignment = false
-      end
     end
 
     # The top-level workspace, see WorkSpace#main
@@ -241,15 +236,6 @@ module IRB
     #     puts "omg"
     #     # omg
     attr_accessor :echo
-    # Whether to echo for assignment expressions
-    #
-    # Uses IRB.conf[:ECHO_ON_ASSIGNMENT] if available, or defaults to +false+.
-    #
-    #     a = "omg"
-    #     IRB.CurrentContext.echo_on_assignment = true
-    #     a = "omg"
-    #     #=> omg
-    attr_accessor :echo_on_assignment
     # Whether verbose messages are displayed or not.
     #
     # A copy of the default <code>IRB.conf[:VERBOSE]</code>
@@ -275,7 +261,6 @@ module IRB
     alias ignore_sigint? ignore_sigint
     alias ignore_eof? ignore_eof
     alias echo? echo
-    alias echo_on_assignment? echo_on_assignment
 
     # Returns whether messages are displayed or not.
     def verbose?
diff --git a/lib/irb/init.rb b/lib/irb/init.rb
index 5dd0c12..d7ee885 100644
--- a/lib/irb/init.rb
+++ b/lib/irb/init.rb
@@ -51,7 +51,6 @@ module IRB # :nodoc:
     @CONF[:IGNORE_SIGINT] = true
     @CONF[:IGNORE_EOF] = false
     @CONF[:ECHO] = nil
-    @CONF[:ECHO_ON_ASSIGNMENT] = nil
     @CONF[:VERBOSE] = nil
 
     @CONF[:EVAL_HISTORY] = nil
@@ -173,10 +172,6 @@ module IRB # :nodoc:
         @CONF[:ECHO] = true
       when "--noecho"
         @CONF[:ECHO] = false
-      when "--echo-on-assignment"
-        @CONF[:ECHO_ON_ASSIGNMENT] = true
-      when "--noecho-on-assignment"
-        @CONF[:ECHO_ON_ASSIGNMENT] = false
       when "--verbose"
         @CONF[:VERBOSE] = true
       when "--noverbose"