\" $NetBSD: stdbool.3,v 1.2 2010/05/14 02:45:39 joerg Exp $
\"
\" Copyright (c) 2010 The NetBSD Foundation, Inc.
\" All rights reserved.
\"
\" This code is derived from software contributed to The NetBSD Foundation
\" by Jukka Ruohonen.
\"
\" Redistribution and use in source and binary forms, with or without
\" modification, are permitted provided that the following conditions
\" are met:
\" 1. Redistributions of source code must retain the above copyright
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\" 2. Redistributions in binary form must reproduce the above copyright
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\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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Dd March 21, 2010
Dt STDBOOL 3
Os
Sh NAME
Nm stdbool
Nd standard boolean types
Sh SYNOPSIS
In stdbool.h
Sh DESCRIPTION
The
In stdbool.h
header defines four macros:
Bl -enum -offset 4n
It
Vt bool ,
which expands to
Vt _Bool ;
It
Vt true ,
which expands to the integer constant 1;
It
Vt false ,
which expands to the integer constant 0; and
It
Vt __bool_true_false_are_defined ,
which expands to the constant 1.
El
Pp
The ability to undefine and redefine the macros
Vt bool ,
Vt true ,
and
Vt false
is an obsolescent feature that may
be withdrawn in a future version of a standard.
Sh SEE ALSO
Xr stdint 3
Sh STANDARDS
The
In stdbool.h
header conforms to
St -isoC-99
and
St -p1003.1-2001 .
Sh HISTORY
The
In stdbool.h
header was first introduced in
Nx 1.6 .

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