Initial revision

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@1 72102866-910b-0410-8b05-ffd578937521

Source/objects/Ordering.h

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+/* Protocol for Objective-C objects that can be ordered.
+   Copyright (C) 1993,1994 Free Software Foundation, Inc.
+
+   Written by:  R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
+   Date: May 1993
+
+   This file is part of the GNU Objective C Class Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/ 
+
+#ifndef __Ordering_h_INCLUDE_GNU
+#define __Ordering_h_INCLUDE_GNU
+
+#include <objects/stdobjects.h>
+#include <objc/objc.h>
+
+@protocol Ordering
+
+- (int) compare: anObject;
+
+- (BOOL) greaterThan: anObject;
+- (BOOL) greaterThanOrEqual: anObject;
+
+- (BOOL) lessThan: anObject;
+- (BOOL) lessThanOrEqual: anObject;
+
+- (BOOL) between: firstObject and: secondObject;
+
+- maximum: anObject;
+- minimum: anObject;
+
+@end
+
+#endif /* __Ordering_h_INCLUDE_GNU */