stdbool.h man page

Prolog

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

stdbool.h — boolean type and values

Synopsis

#include <stdbool.h>

Description

The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1‐2008 defers to the ISO C standard.

The <stdbool.h> header shall define the following macros:

bool
Expands to _Bool.
true
Expands to the integer constant 1.
false
Expands to the integer constant 0.
__bool_true_false_are_defined
Expands to the integer constant 1.

An application may undefine and then possibly redefine the macros bool, true, and false.

The following sections are informative.

Future Directions

The ability to undefine and redefine the macros bool, true, and false is an obsolescent feature and may be removed in a future version.

Info

2013 IEEE/The Open Group POSIX Programmer's Manual