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, Copyright (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.opengroup.org/unix/online.html .