__FUNCTION__ ????
Kalle Olavi Niemitalo <k...@iki.fi>
sob
...@eudoramail.com (Sobhan Vezzu) writes:
> I understood that __FUNCTION__ is a preprocessor macro, which
> will substitute a file name. Similar to __FILE__ and __LINE__.
__FUNCTION__ is a GCC-specific extension. Please read the node
"Function Names" in the GCC Info file or "Function Names as Strings"
in the printed manual; it's all explained there.
> 1) I have written a small code, only for __FUNCTION__ it
> prints as unknown why?
__FUNCTION__ is not a preprocessor macro, because the preprocessor
does not know about functions.
C99 has a similar identifier __func__, which isn't a preprocessor
macro either.
> 2) Where do I get a list of all the preprocessor macros.
If you're using GCC on Unix, you can do this:
gcc -E -dM -xc /dev/null
i.e., preprocess an empty file as C and list all defined macros when
finished. Many of those macros are not in any standard.
