indexing

	description:
		"Individual elements of lexical analysis";

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

class TOKEN 

feature -- Access

	type: INTEGER;
			-- Type of the token

	line_number: INTEGER;
			-- Line number in the parsed text

	column_number: INTEGER;
			-- Column number in the parsed text

	keyword_code: INTEGER;
			-- Identification number if the token is a keyword

	string_value: STRING;
			-- The token's character string

	is_keyword (i: INTEGER): BOOLEAN is
			-- If the token is a keyword,
			-- is `i' its identification number?
		do
			Result := (i = keyword_code)
		end 

feature -- Status setting

	set (typ, lin, col, key: INTEGER; str: STRING) is
		-- Reset the contents of the token:
		-- type `type', line number `lin',
		-- column number `col', keyword value `key'.
		do
			type := typ;
			line_number := lin;
			column_number := col;
			keyword_code := key;
			if type = 0 then
				string_value := ""
			else
				string_value := str
			end
		end

feature -- Obsolete

	position_in_line: INTEGER is
		obsolete "Use ``column_number'' instead"
	do
		Result := column_number
	end

end -- class TOKEN

--|----------------------------------------------------------------
--| EiffelLex: library of reusable components for ISE Eiffel.
--| Copyright (C) 1985-2004 Eiffel Software. All rights reserved.
--| Duplication and distribution prohibited.  May be used only with
--| ISE Eiffel, under terms of user license.
--| Contact Eiffel Software for any other use.
--|
--| Interactive Software Engineering Inc.
--| dba Eiffel Software
--| 356 Storke Road, Goleta, CA 93117 USA
--| Telephone 805-685-1006, Fax 805-685-6869
--| Contact us at: http://www.eiffel.com/general/email.html
--| Customer support: http://support.eiffel.com
--| For latest info on our award winning products, visit:
--|	http://www.eiffel.com
--|----------------------------------------------------------------