ASSERT(T)           Linux Programmer's Manual           ASSERT(T)



NAME
       assert - abort the program if assertion is false

SYNOPSIS
       #include <assert.h>

       void assert(int expression);

DESCRIPTION
       assert()  prints  an  error message to standard output and
       terminates the program by calling abort() if expression is
       false  (i.e.,  compares equal to zero).  This only happens
       when the macro NDEBUG was undefined  when  <assert.h>  was
       last included.

RETURN VALUE
       No value is returned.

CONFORMING TO
       ISO9899  (ANSI  C).   In  the 1990 standard, expression is
       required to be of type int and undefined behavior  results
       if  it  is  not,  but in the 1999 standard it may have any
       scalar type.

BUGS
       assert() is implemented as  a  macro;  if  the  expression
       tested has side-effects, program behaviour will be differ-
       ent depending on whether NDEBUG is defined.  This may cre-
       ate  Heisenbugs which go away when debugging is turned on.

SEE ALSO
       exit(t), abort(t)



GNU                         1993-04-04                  ASSERT(T)