stdbool.mh

来自「开放源码的编译器open watcom 1.6.0版的源代码」· MH 代码 · 共 39 行

/***************************************************************************
 * FILE: stdbool.h (Macros to simulate the 'bool' type in C)
 *
:include crwat.sp
 *
 * Description: This header is part of the C99 standard library. It
 *              provides a way for the programmer, at his/her option
 *              to introduce the type 'bool' into a C program.
 ***************************************************************************/
#ifndef _STDBOOL_H_INCLUDED
#define _STDBOOL_H_INCLUDED
:include readonly.sp
::
:: To prevent compatibility problems for C++ programs that call C
:: functions using the 'bool' defined here, the sizeof(C++'s bool)
:: should be equal to the sizeof(C's bool defined here). Currently
:: for C++, sizeof(bool) == 1.
::
:: Similarly the values for 'true' and 'false' defined here should
:: be compatible with the values of true and false built into the
:: C++ compiler. That appears to be the case with 1 and 0 (is that
:: a consequence of the C++ standard?)
::

:: C++ programs should use the built in bool type.
#ifndef __cplusplus
#if __STDC_VERSION__ >= 199901L
 #define bool _Bool
#else
 #define bool char
#endif
#define true  1
#define false 0
#endif

#define __bool_true_false_are_defined 1

#endif