ostruct.rb: respond_to?

* lib/ostruct.rb (OpenStruct): make respond_to? working on
  just-allocated objects for workaround of Psych.
  [ruby-core:72501] [Bug #11884]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53366 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,15 @@
+Tue Dec 29 12:48:34 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/ostruct.rb (OpenStruct): make respond_to? working on
+	  just-allocated objects for workaround of Psych.
+	  [ruby-core:72501] [Bug #11884]
+
+Tue Dec 29 12:46:13 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/ostruct.rb (OpenStruct): make respond_to? working on
+	  just-allocated objects for workaround of Psych.
+	  [ruby-core:72501] [Bug #11884]
+
 Tue Dec 29 10:35:00 2015  Kenta Murata  <mrkn@mrkn.jp>
 
 	* test/mkmf/test_have_func.rb (test_have_func):

lib/ostruct.rb

@@ -71,6 +71,11 @@
 # of these properties compared to using a Hash or a Struct.
 #
 class OpenStruct
+  # :nodoc:
+  class << self
+    alias allocate new
+  end
+
   #
   # Creates a new OpenStruct object.  By default, the resulting OpenStruct
   # object will have no attributes.

test/ostruct/test_ostruct.rb

@@ -23,6 +23,10 @@ class TC_OpenStruct < Test::Unit::TestCase
     assert_respond_to(o, :a=)
   end
 
+  def test_respond_to_allocated
+    assert_not_respond_to(OpenStruct.allocate, :a)
+  end
+
   def test_equality
     o1 = OpenStruct.new
     o2 = OpenStruct.new