Gestion du type boolean

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/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. 
 
This file is part of GCC. 
 
GCC is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2, or (at your option) 
any later version. 
 
GCC 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 General Public License for more details. 
 
You should have received a copy of the GNU General Public License 
along with GCC; see the file COPYING.  If not, write to 
the Free Software Foundation, 59 Temple Place - Suite 330, 
Boston, MA 02111-1307, USA.  */ 
 
/* As a special exception, if you include this header file into source 
   files compiled by GCC, this header file does not by itself cause 
   the resulting executable to be covered by the GNU General Public 
   License.  This exception does not however invalidate any other 
   reasons why the executable file might be covered by the GNU General 
   Public License.  */ 
 
/* 
 * ISO C Standard:  7.16  Boolean type and values  <stdbool.h> 
 */ 
 
#ifndef _STDBOOL_H 
#define _STDBOOL_H 
 
#ifndef __cplusplus 
 
#define bool	_Bool 
#define true	1 
#define false	0 
 
#else /* __cplusplus */ 
 
/* Supporting <stdbool.h> in C++ is a GCC extension.  */ 
#define _Bool	bool 
#define bool	bool 
#define false	false 
#define true	true 
 
#endif /* __cplusplus */ 
 
/* Signal that all the definitions are present.  */ 
#define __bool_true_false_are_defined	1 
 
#endif	/* stdbool.h */