ruby classes can round trip

3 files changed, 11 insertions, 6 deletions

diff --git a/lib/psych/visitors/to_ruby.rb b/lib/psych/visitors/to_ruby.rb
index f8b1585..cb0afd2 100644
--- a/lib/psych/visitors/to_ruby.rb
+++ b/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"
diff --git a/lib/psych/visitors/yaml_tree.rb b/lib/psych/visitors/yaml_tree.rb
index 6f90377..de35c76 100644
--- a/lib/psych/visitors/yaml_tree.rb
+++ b/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
diff --git a/test/psych/test_class.rb b/test/psych/test_class.rb
index cba88ba..8fd4ad0 100644
--- a/test/psych/test_class.rb
+++ b/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