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OpenSolaris 2009.06 - man page for assert (opensolaris section 3c)

assert(3C)						   Standard C Library Functions 						assert(3C)

NAME
assert - verify program assertion
SYNOPSIS
#include <assert.h> 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 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).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+
SEE ALSO
cc(1B), abort(3C), gettext(3C), setlocale(3C), attributes(5), standards(5) SunOS 5.11 30 Mar 2005 assert(3C)