1assert.h(0P)               POSIX Programmer's Manual              assert.h(0P)
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PROLOG

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

13       assert.h — verify program assertion
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SYNOPSIS

16       #include <assert.h>
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DESCRIPTION

19       The functionality described on this reference page is aligned with  the
20       ISO C  standard.  Any  conflict between the requirements described here
21       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2008
22       defers to the ISO C standard.
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24       The <assert.h> header shall define the assert() macro. It refers to the
25       macro NDEBUG which is not defined in the header. If NDEBUG  is  defined
26       as a macro name before the inclusion of this header, the assert() macro
27       shall be defined simply as:
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29           #define assert(ignore)((void) 0)
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31       Otherwise, the macro behaves as described in assert().
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33       The assert() macro shall be redefined according to the current state of
34       NDEBUG each time <assert.h> is included.
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36       The  assert() macro shall be implemented as a macro, not as a function.
37       If the macro definition is suppressed in  order  to  access  an  actual
38       function, the behavior is undefined.
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40       The following sections are informative.
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APPLICATION USAGE

43       None.
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RATIONALE

46       None.
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FUTURE DIRECTIONS

49       None.
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SEE ALSO

52       The System Interfaces volume of POSIX.1‐2008, assert()
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55       Portions  of  this text are reprinted and reproduced in electronic form
56       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
57       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
58       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
59       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
60       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  In  the
61       event of any discrepancy between this version and the original IEEE and
62       The Open Group Standard, the original IEEE and The Open Group  Standard
63       is  the  referee document. The original Standard can be obtained online
64       at http://www.unix.org/online.html .
65
66       Any typographical or formatting errors that appear  in  this  page  are
67       most likely to have been introduced during the conversion of the source
68       files to man page format. To report such errors,  see  https://www.ker‐
69       nel.org/doc/man-pages/reporting_bugs.html .
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73IEEE/The Open Group                  2013                         assert.h(0P)
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