<assert.h>(0P)                                      POSIX Programmer's Manual                                     <assert.h>(0P)



NAME
       assert.h - verify program assertion

SYNOPSIS
       #include <assert.h>

DESCRIPTION
       The <assert.h> header shall define the assert() macro.  It refers to the macro NDEBUG which is not defined in the header.
       If NDEBUG is defined as a macro name before the inclusion of this header, the assert() macro shall be defined simply as:


              #define assert(ignore)((void) 0)

       Otherwise, the macro behaves as described in assert().

       The assert() macro shall be redefined according to the current state of NDEBUG each time <assert.h> is included.

       The assert() macro shall be implemented as a macro, not as a function. If the macro definition is suppressed in order  to
       access an actual function, the behavior is undefined.

       The following sections are informative.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The System Interfaces volume of IEEE Std 1003.1-2001, assert()

COPYRIGHT
       Portions  of  this  text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for
       Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6,  Copy-
       right (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any
       discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open  Group
       Standard   is   the   referee   document.   The   original   Standard   can   be   obtained  online  at  http://www.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                <assert.h>(0P)