marcandre	2009-12-29 10:56:55 +0900 (Tue, 29 Dec 2009)

  New Revision: 26195

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=26195

  Log:
    * lib/delegate.rb (marshal_dump/load): Provide forward compatibility [ruby-core:24211]

  Modified files:
    trunk/lib/delegate.rb

Index: lib/delegate.rb
===================================================================
--- lib/delegate.rb	(revision 26194)
+++ lib/delegate.rb	(revision 26195)
@@ -184,16 +184,21 @@
   # Serialization support for the object returned by \_\_getobj\_\_.
   def marshal_dump
     [
+      :__v2__,
       instance_variables,
       instance_variables.map{|var| instance_variable_get(var)},
       __getobj__
     ]
   end
   # Reinitializes delegation from a serialized object.
-  def marshal_load(obj)
-    vars, values, obj = obj
-    vars.each_with_index{|var, i| instance_variable_set(var, values[i])}
-    __setobj__(obj)
+  def marshal_load(data)
+    version, vars, values, obj = data
+    if version == :__v2__
+      vars.each_with_index{|var, i| instance_variable_set(var, values[i])}
+      __setobj__(obj)
+    else
+      __setobj__(data)
+    end
   end
 
   # Clone support for the object returned by \_\_getobj\_\_.

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