From: Erik Veenstra <erikveen@...>
Date: 2006-07-25T06:04:25+09:00
Subject: Object to which a meta class belongs?

If a singleton class belongs to an object, it should be
possible to determine to which object it belongs. Is that
possible?

I came up with the code below, but it might not be very fast.

Thanks.

gegroet,
Erik V. - http://www.erikveen.dds.nl/

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 class Object
   def metaclass
     obj = self

     class << self
       self
     end.instance_eval do
       instance_eval <<-END
         def belongs_to
           ObjectSpace._id2ref(#{obj.__id__})
         end
       END

       self
     end
   end
 end

 a       = "TEST"

 p a.__id__
 p a.metaclass.belongs_to.__id__

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