163d1a8abSmrg /* Interface for the Object class for Objective-C.
2*ec02198aSmrg    Copyright (C) 1993-2020 Free Software Foundation, Inc.
363d1a8abSmrg 
463d1a8abSmrg This file is part of GCC.
563d1a8abSmrg 
663d1a8abSmrg GCC is free software; you can redistribute it and/or modify it
763d1a8abSmrg under the terms of the GNU General Public License as published by the
863d1a8abSmrg Free Software Foundation; either version 3, or (at your option) any
963d1a8abSmrg later version.
1063d1a8abSmrg 
1163d1a8abSmrg GCC is distributed in the hope that it will be useful, but WITHOUT
1263d1a8abSmrg ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1363d1a8abSmrg FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
1463d1a8abSmrg License for more details.
1563d1a8abSmrg 
1663d1a8abSmrg Under Section 7 of GPL version 3, you are granted additional
1763d1a8abSmrg permissions described in the GCC Runtime Library Exception, version
1863d1a8abSmrg 3.1, as published by the Free Software Foundation.
1963d1a8abSmrg 
2063d1a8abSmrg You should have received a copy of the GNU General Public License and
2163d1a8abSmrg a copy of the GCC Runtime Library Exception along with this program;
2263d1a8abSmrg see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
2363d1a8abSmrg <http://www.gnu.org/licenses/>.  */
2463d1a8abSmrg 
2563d1a8abSmrg 
2663d1a8abSmrg #ifndef __object_INCLUDE_GNU
2763d1a8abSmrg #define __object_INCLUDE_GNU
2863d1a8abSmrg 
2963d1a8abSmrg #include "objc.h"
3063d1a8abSmrg 
3163d1a8abSmrg #ifdef __cplusplus
3263d1a8abSmrg extern "C" {
3363d1a8abSmrg #endif
3463d1a8abSmrg 
3563d1a8abSmrg /* The Object class is a very minimal root class included with the
3663d1a8abSmrg    runtime.  It is used as superclass for the two classes included
3763d1a8abSmrg    with the runtime, Protocol and NXConstantString.
3863d1a8abSmrg 
3963d1a8abSmrg    Because Objective-C allows multiple root classes, you can define
4063d1a8abSmrg    your own root class, different from Object.
4163d1a8abSmrg 
4263d1a8abSmrg    In particular, a Foundation library (such as GNUstep Base) is
4363d1a8abSmrg    expected to provide its own root class (typically called NSObject),
4463d1a8abSmrg    fully integrated with the library's own high-level features.  It is
4563d1a8abSmrg    expected that you should always use and interact with NSObject, and
4663d1a8abSmrg    mostly ignore Object.  */
4763d1a8abSmrg 
4863d1a8abSmrg /* All classes are derived from Object.  As such, this is the overhead
4963d1a8abSmrg    tacked onto those objects.  */
5063d1a8abSmrg @interface Object
5163d1a8abSmrg {
5263d1a8abSmrg   Class isa; /* A pointer to the instance's class structure.  */
5363d1a8abSmrg }
5463d1a8abSmrg - (Class)class;
5563d1a8abSmrg - (BOOL)isEqual: (id)anObject;
5663d1a8abSmrg @end
5763d1a8abSmrg 
5863d1a8abSmrg #ifdef __cplusplus
5963d1a8abSmrg }
6063d1a8abSmrg #endif
6163d1a8abSmrg 
6263d1a8abSmrg #endif
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