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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 .