* ext/psych/lib/psych/visitors/to_ruby.rb: Ruby classes can be loaded

from YAML files.
* ext/psych/lib/psych/visitors/yaml_tree.rb: Ruby classes can be
  dumped to YAML files.
* test/psych/test_class.rb: corresponding test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31958 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Thu Jun  9 09:05:04 2011  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* ext/psych/lib/psych/visitors/to_ruby.rb: Ruby classes can be loaded
+	  from YAML files.
+	* ext/psych/lib/psych/visitors/yaml_tree.rb: Ruby classes can be
+	  dumped to YAML files.
+	* test/psych/test_class.rb: corresponding test.
+
 Wed Jun  8 21:38:57 2011  CHIKANAGA Tomoyuki  <nagachika00@gmail.com>
 
 	* cont.c (root_fiber_alloc): set root fiber's status RUNNING.

ext/psych/lib/psych/visitors/to_ruby.rb

@@ -57,6 +57,8 @@ module Psych
           Complex(o.value)
         when "!ruby/object:Rational"
           Rational(o.value)
+        when "!ruby/class"
+          resolve_class o.value
         when "tag:yaml.org,2002:float", "!float"
           Float(@ss.tokenize(o.value))
         when "!ruby/regexp"

ext/psych/lib/psych/visitors/yaml_tree.rb

@@ -247,7 +247,8 @@ module Psych
       end
 
       def visit_Class o
-        raise TypeError, "can't dump anonymous class #{o.class}"
+        raise TypeError, "can't dump anonymous class: #{o}" unless o.name
+        @emitter.scalar o.name, nil, '!ruby/class', false, false, Nodes::Scalar::SINGLE_QUOTED
       end
 
       def visit_Range o

test/psych/test_class.rb

@@ -2,16 +2,18 @@ require 'psych/helper'
 
 module Psych
   class TestClass < TestCase
-    def test_cycle
+    def test_cycle_anonymous_class
       assert_raises(::TypeError) do
-        assert_cycle(TestClass)
+        assert_cycle(Class.new)
       end
     end
 
+    def test_cycle
+      assert_cycle(TestClass)
+    end
+
     def test_dump
-      assert_raises(::TypeError) do
-        Psych.dump TestClass
-      end
+      Psych.dump TestClass
     end
   end
 end