assert(3) [minix man page]

ASSERT(3)						     Library Functions Manual							 ASSERT(3)

NAME

       assert - program verification

SYNOPSIS

       #include <assert.h>

       void assert(int expression)

DESCRIPTION

       Assert  is  a macro that indicates expression is expected to be true at this point in the program.  It causes an abort(3) with a diagnostic
       comment on the standard output when expression is false (0).  Compiling with the cc(1) option -DNDEBUG effectively deletes assert from  the
       program.

DIAGNOSTICS

       `Assertion "expression" failed: file f line n.'	F is the source file and n the source line number of the assert statement.

7th Edition							   May 12, 1986 							 ASSERT(3)

assert(3C)																assert(3C)

NAME

       assert - verify program assertion

SYNOPSIS

       #include <assert.h>

       void assert(int expression);

       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 message, xyz is the name of the source file and nnn the source line number of the
       assert() statement. These are respectively 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 (see cc(1B)), or with the preprocessor  control	statement  #define  NDEBUG  ahead  of  the
       #include <assert.h> 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).

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

       cc(1B), abort(3C), gettext(3C), setlocale(3C), attributes(5), standards(5)

								    30 Mar 2005 							assert(3C)