1  require 'active_support/deprecation'
   2 
   3  class Object
   4    # Get object's meta (ghost, eigenclass, singleton) class.
   5    #
   6    # Deprecated in favor of Object#singleton_class.
   7    def metaclass
   8      class << self
   9        self
  10      end
  11    end
  12 
  13    deprecate :metaclass => :singleton_class
  14  end