Manual Pages for UNIX Operating System command usage for man assert

Standard C Library Functions                           assert(3C)



NAME
     assert - verify program assertion

SYNOPSIS
     #include 

     void assert(int expression);


DESCRIPTION
     The assert() macro inserts  diagnostics  into  applications.
     When  executed,  if  expression  is  FALSE  (zero), assert()
     prints the error message

       Assertion failed: expression, file xyz, line nnn



     on the standard error output and aborts. In the  error  mes-
     sage,  xyz is the name of the source file and nnn the source
     line number of the assert()  statement.  These  are  respec-
     tively  the  values  of the preprocessor macros __FILE__ and
     __LINE__.


     Since assert() is implemented as a macro, the expression may
     not contain any string literals.


     Compiling with the preprocessor option -DNDEBUG or with  the
     preprocessor  control  statement #define NDEBUG ahead of the
     #include  statement,  will  stop  assertions  from
     being compiled into the program.


     Messages printed  from  this  function  are  in  the  native
     language  specified  by the LC_MESSAGES locale category. See
     setlocale(3C).

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:













SunOS 5.11          Last change: 30 Mar 2005                    1






Standard C Library Functions                           assert(3C)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | Safe                        |
    |_____________________________|_____________________________|
    | Standard                    | See standards(5).           |
    |_____________________________|_____________________________|


SEE ALSO
     abort(3C), gettext(3C), setlocale(3C), attributes(5),  stan-
     dards(5)









































SunOS 5.11          Last change: 30 Mar 2005                    2