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-- File: PCollection_Compare.cdl
-- Created: Tue May 14 18:07:48 1991
-- Author: Annick PANCHER
-- <apc@topsn2>
-- Revised: Mireille MERCIEN
-- <mip@sdsun3>
-- Copyright: Matra Datavision 1992
deferred generic class Compare from PCollection ( Item as Storable)
inherits Storable
---Purpose: Defines a comparison operator which can be used by
-- any ordered structure. The way to compare items
-- has to be described in subclasses, which inherit
-- from instantiations of Compare.
is
IsLower (me; Left, Right: Item)
---Purpose: Returns True if <Left> is lower than <Right>
returns Boolean is virtual;
---Level: Public
IsGreater (me; Left, Right: Item)
---Purpose: Returns True if <Left> is greater than <Right>
returns Boolean is virtual;
---Level: Public
IsEqual(me; Left, Right: Item)
---Purpose: Returns True when <Right> and <Left> are equal.
returns Boolean;
---Level: Public
end;
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