gcc/ginclude/stdbool.h

   1 /* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
   2
   3 This file is part of GNU CC.
   4
   5 GNU CC is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GNU CC is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU CC; see the file COPYING.  If not, write to
  17 the Free Software Foundation, 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 /* As a special exception, if you include this header file into source
  21    files compiled by GCC, this header file does not by itself cause
  22    the resulting executable to be covered by the GNU General Public
  23    License.  This exception does not however invalidate any other
  24    reasons why the executable file might be covered by the GNU General
  25    Public License.  */
  26
  27 /*
  28  * ISO C Standard:  7.16  Boolean type and values  <stdbool.h>
  29  */
  30
  31 #ifndef _STDBOOL_H
  32 #define _STDBOOL_H
  33
  34 /* The type `_Bool' must promote to `int' or `unsigned int'.  The constants
  35    `true' and `false' must have the value 0 and 1 respectively.  */
  36 typedef enum
  37   {
  38     false = 0,
  39     true = 1
  40   } _Bool;
  41
  42 /* The names `true' and `false' must also be made available as macros.  */
  43 #define false   false
  44 #define true    true
  45
  46 /* The macro `bool', which may be undefined, expands to _Bool.  */
  47 #define bool _Bool
  48
  49 /* Signal that all the definitions are present.  */
  50 #define __bool_true_false_are_defined   1
  51
  52 #endif  /* stdbool.h */