A question about the precompiled directive ASSERT

[George2]

Hi, everyone!

Please look at the following code,

--------
#if ASSERT
sprintf (s, "_Assert: %s, %d",__FILE__, __LINE__ );
#else
//...
#endif
--------

I want to know where is the precompiled directive ASSERT defined?
Is it compiler system defined variable? What is the meaning and
function of it?


Thanks in advance,
George

[PaulWendt]

It depends on your compiler; it's my understanding that ASSERT
isn't part of the C standard so using it might be nonportable
[as opposed to assert(), which should be portable]. Anyway,
in my compiler, ASSERT is #define'd in crtdbg.h, afx.h, and I'm sure
it's #define'd other ways in other places as well. Do a grep or
similar search through your compiler's header files and find out
for yourself where it'll be #define'd on your system.

--Paul

[George2]

Thanks!

George

Originally posted by PaulWendt
It depends on your compiler; it's my understanding that ASSERT
isn't part of the C standard so using it might be nonportable
[as opposed to assert(), which should be portable]. Anyway,
in my compiler, ASSERT is #define'd in crtdbg.h, afx.h, and I'm sure
it's #define'd other ways in other places as well. Do a grep or
similar search through your compiler's header files and find out
for yourself where it'll be #define'd on your system.

--Paul

[Dmitry Zemskov]

Moreover, ASSERT is a non-standard Microsoft MFC substitution for standard C assert macro. Nota bene, ASSERT is in effect only when the MFC macro _DEBUG defined, opposed to assert, which depends on the standard NDEBUG macro.