#
# This file contains the Ruby code from Program 5.2 of
# "Data Structures and Algorithms
# with Object-Oriented Design Patterns in Ruby"
# by Bruno R. Preiss.
#
# Copyright (c) 2004 by Bruno R. Preiss, P.Eng.  All rights reserved.
#
# http://www.brpreiss.com/books/opus8/programs/pgm05_02.txt
#
class Module

    def abstractmethod(symbol)
	module_eval <<-"end_eval"
	    def #{symbol.id2name}(*args)
		raise MethodNotImplementedError
	    end
	end_eval
    end

end