Automatic generation produced by ISE Eiffel
indexing description: "Objects that may be compared according to a total order relation" note: "The basic operation is `<' (less than); others are defined in terms of this operation and `is_equal'." status: "See notice at end of class" names: comparable, comparison date: "$Date: 2001-11-16 20:32:23 +0000 (Fri, 16 Nov 2001) $" revision: "$Revision: 51435 $" deferred class interface COMPARABLE feature -- Comparison is_equal (other: like Current): BOOLEAN -- Is other attached to an object of the same type -- as current object and identical to it? require -- from ANY other_not_void: other /= void ensure -- from ANY symmetric: Result implies other.is_equal (Current) consistent: standard_is_equal (other) implies Result ensure then trichotomy: Result = (not (Current < other) and not (other < Current)) max (other: like Current): like Current -- The greater of current object and other require other_exists: other /= void ensure current_if_not_smaller: Current >= other implies Result = Current other_if_smaller: Current < other implies Result = other min (other: like Current): like Current -- The smaller of current object and other require other_exists: other /= void ensure current_if_not_greater: Current <= other implies Result = Current other_if_greater: Current > other implies Result = other three_way_comparison (other: like Current): INTEGER -- If current object equal to other, 0; -- if smaller, -1; if greater, 1 require other_exists: other /= void ensure equal_zero: (Result = 0) = is_equal (other) smaller_negative: (Result = - 1) = (Current < other) greater_positive: (Result = 1) = (Current > other) infix "<" (other: like Current): BOOLEAN -- Is current object less than other? require -- from PART_COMPARABLE other_exists: other /= void ensure then asymmetric: Result implies not (other < Current) infix "<=" (other: like Current): BOOLEAN -- Is current object less than or equal to other? require -- from PART_COMPARABLE other_exists: other /= void ensure then definition: Result = ((Current < other) or is_equal (other)) infix ">" (other: like Current): BOOLEAN -- Is current object greater than other? require -- from PART_COMPARABLE other_exists: other /= void ensure then definition: Result = (other < Current) infix ">=" (other: like Current): BOOLEAN -- Is current object greater than or equal to other? require -- from PART_COMPARABLE other_exists: other /= void ensure then definition: Result = (other <= Current) invariant irreflexive_comparison: not (Current < Current) -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) 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 COMPARABLE -- Generated by ISE Eiffel --
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