* enumerator.c (ary2sv): add dup argument.

  (enumerator_next): call ary2sv with dup=0.
  (enumerator_peek): call ary2sv with dup=1 to return duplicated array.
  (enumerator_peek_values_m): new function to return duplicated array.
  (Init_Enumerator): use enumerator_peek_values_m as
  Enumerator#peek_value.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@24619 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 22 insertions, 0 deletions

diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index e70a783a0..fe8a573b2 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -141,6 +141,28 @@ class TestEnumerator < Test::Unit::TestCase
     assert_raise(StopIteration) { e.peek }
   end
 
+  def test_peek_modify
+    o = Object.new
+    def o.each
+      yield 1,2
+    end
+    e = o.to_enum
+    a = e.peek
+    a << 3
+    assert_equal([1,2], e.peek)
+  end
+
+  def test_peek_values_modify
+    o = Object.new
+    def o.each
+      yield 1,2
+    end
+    e = o.to_enum
+    a = e.peek_values
+    a << 3
+    assert_equal([1,2], e.peek)
+  end
+
   def test_next_after_stopiteration
     a = [1]
     e = a.each