method in instance_eval

* class.c (rb_special_singleton_class_of): utility function.
* vm_eval.c (eval_under): special deal for class variable scope with
  instance_eval.
* vm_eval.c (rb_obj_instance_eval, rb_obj_instance_exec): allow method
  definition in instance_eval of special constants.  [ruby-core:28324]
  [Bug #2788]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36647 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_eval.rb b/test/ruby/test_eval.rb
index fe97cd48cb..c24e4fa948 100644
--- a/test/ruby/test_eval.rb
+++ b/test/ruby/test_eval.rb
@@ -200,6 +200,21 @@ class TestEval < Test::Unit::TestCase
     end
   end
 
+  def test_instance_eval_method
+    bug2788 = '[ruby-core:28324]'
+    [Object.new, [], nil, true, false].each do |o|
+      assert_nothing_raised(TypeError, "#{bug2788} (#{o.inspect})") do
+        o.instance_eval {
+          def defd_using_instance_eval() :ok end
+        }
+      end
+      assert_equal(:ok, o.defd_using_instance_eval)
+      class << o
+        remove_method :defd_using_instance_eval
+      end
+    end
+  end
+
   #
   # From ruby/test/ruby/test_eval.rb
   #