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(_Bool, bool, false, true, __bool_true_false_are_defined):

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Use the pattern recommended by Autoconf 2.57, except also protect
against double-definition.
This commit is contained in:
Paul Eggert
2003-01-03 14:15:16 +00:00
parent 1029ea6d02
commit 45aa0550a1
1 changed files with 15 additions and 2 deletions
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17
src/system.h
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@@ -1,5 +1,6 @@
/* System-dependent definitions for Bison. /* System-dependent definitions for Bison.
Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by it under the terms of the GNU General Public License as published by
@@ -185,7 +186,19 @@ void *memrchr (const void *s, int c, size_t n);
#if HAVE_STDBOOL_H #if HAVE_STDBOOL_H
# include <stdbool.h> # include <stdbool.h>
#else #else
typedef enum {false = 0, true = 1} bool; # ifndef __bool_true_false_are_defined
# if ! HAVE__BOOL
# ifdef __cplusplus
typedef bool _Bool;
# else
typedef unsigned char _Bool;
# endif
# endif
# define bool _Bool
# define false 0
# define true 1
# define __bool_true_false_are_defined 1
# endif
#endif #endif