indexing
	description:
		"Comparators for characters"

	status:	"See note at end of class"
	date: "$Date$"
	revision: "$Revision$"

deferred class 
	COMPARATOR

feature -- Access

	character_set: STRING is
			-- Character set represented by comparator
		deferred
		end

	contains (c: CHARACTER): BOOLEAN is
			-- Does comparator contain `c'?
		deferred
		end
	
invariant

	no_empty_comparator: character_set /= Void and then 
			not character_set.is_empty

end -- class COMPARATOR


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--| EiffelNet: library of reusable components for ISE Eiffel.
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