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indexing
	description: "References to objects containing a character value"
	status: "See notice at end of class"
	date: "$Date: 2001-11-16 20:32:23 +0000 (Fri, 16 Nov 2001) $"
	revision: "$Revision: 51435 $"

class 
	WIDE_CHARACTER_REF

inherit
	COMPARABLE
		redefine
			three_way_comparison,
			is_equal
		end

	HASHABLE
		redefine
			is_hashable,
			is_equal
		end

feature -- Access

	item: WIDE_CHARACTER
			-- Character value

	code: INTEGER is
			-- Associated integer value
		do
			Result := chcode (item)
		end

	hash_code: INTEGER is
			-- Hash code value
		do
			Result := code
		end
	
feature -- Status report

	Is_hashable: BOOLEAN is True
			-- May current object be hashed?
	
feature -- Comparison

	infix "<" (other: like Current): BOOLEAN is
			-- Is other greater than current character?
		do
			Result := item < other.item
		end

	is_equal (other: like Current): BOOLEAN is
			-- Is other attached to an object of the same type
			-- as current object and identical to it?
		do
			Result := other.item = item
		end

	three_way_comparison (other: WIDE_CHARACTER_REF): INTEGER is
			-- If current object equal to other, 0;
			-- if smaller, -1; if greater, 1
		do
			if item < other.item then
				Result := - 1
			elseif other.item < item then
				Result := 1
			end
		end
	
feature -- Element change

	set_item (c: WIDE_CHARACTER) is
			-- Make c the item value.
		do
			item := c
		end
	
feature {NONE} -- Implementation

	chcode (c: like item): INTEGER is
			-- Associated integer value
		external
			"C [macro %"eif_misc.h%"]"
		end
	
indexing
	library: "[
			EiffelBase: Library of reusable components for Eiffel.
	]"
	status: "[
			Copyright 1986-2001 Interactive Software Engineering (ISE).
			For ISE customers the original versions are an ISE product
			covered by the ISE Eiffel license and support agreements.
	]"
	license: "[
			EiffelBase may now be used by anyone as FREE SOFTWARE to
			develop any product, public-domain or commercial, without
			payment to ISE, under the terms of the ISE Free Eiffel Library
			License (IFELL) at http://eiffel.com/products/base/license.html.
	]"
	source: "[
			Interactive Software Engineering Inc.
			ISE Building
			360 Storke Road, Goleta, CA 93117 USA
			Telephone 805-685-1006, Fax 805-685-6869
			Electronic mail <info@eiffel.com>
			Customer support http://support.eiffel.com
	]"
	info: "[
			For latest info see award-winning pages: http://eiffel.com
	]"

end -- class WIDE_CHARACTER_REF


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