1 /* Interface for the Object class for Objective-C.
2 Copyright (C) 1993-2020 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 3, or (at your option) any
11 GCC is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
26 #ifndef __object_INCLUDE_GNU
27 #define __object_INCLUDE_GNU
35 /* The Object class is a very minimal root class included with the
36 runtime. It is used as superclass for the two classes included
37 with the runtime, Protocol and NXConstantString.
39 Because Objective-C allows multiple root classes, you can define
40 your own root class, different from Object.
42 In particular, a Foundation library (such as GNUstep Base) is
43 expected to provide its own root class (typically called NSObject),
44 fully integrated with the library's own high-level features. It is
45 expected that you should always use and interact with NSObject, and
46 mostly ignore Object. */
48 /* All classes are derived from Object. As such, this is the overhead
49 tacked onto those objects. */
52 Class isa
; /* A pointer to the instance's class structure. */
55 - (BOOL
)isEqual
: (id
)anObject
;