debian man page for assert

ASSERT(3alleg4) 						  Allegro manual						   ASSERT(3alleg4)

NAME
       ASSERT - Debugging helper macro to assert. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       void ASSERT(condition);

DESCRIPTION
       Debugging  helper  macro.  Normally compiles away to nothing, but if you defined the preprocessor symbol DEBUGMODE before including Allegro
       headers, it will check the supplied condition and call al_assert() if it fails, whose default action is to stop the program and report  the
       assert. You can use this macro even when Allegro has not been initialised. Example:

	  #define DEBUGMODE
	  #include
	  ...
	  void my_blitter(BITMAP *source, int flags)
	  {
	     int some_variables;
	     ASSERT(source != NULL);
	     ASSERT(flags & GAME_RUNNING);
	     ...
	  }

SEE ALSO
       al_assert(3alleg4), TRACE(3alleg4), register_assert_handler(3alleg4), expackf(3alleg4)

Allegro 							   version 4.4.2						   ASSERT(3alleg4)