gcc.info: Function Names
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Function Names as Strings
GNU CC predefines two string variables to be the name of the current
function. The variable `__FUNCTION__' is the name of the function as
it appears in the source. The variable `__PRETTY_FUNCTION__' is the
name of the function pretty printed in a language specific fashion.
These names are always the same in a C function, but in a C++
function they may be different. For example, this program:
extern "C" {
extern int printf (char *, ...);
}
class a {
public:
sub (int i)
{
printf ("__FUNCTION__ = %s\n", __FUNCTION__);
printf ("__PRETTY_FUNCTION__ = %s\n", __PRETTY_FUNCTION__);
}
};
int
main (void)
{
a ax;
ax.sub (0);
return 0;
}
gives this output:
__FUNCTION__ = sub
__PRETTY_FUNCTION__ = int a::sub (int)
These names are not macros: they are predefined string variables.
For example, `#ifdef __FUNCTION__' does not have any special meaning
inside a function, since the preprocessor does not do anything special
with the identifier `__FUNCTION__'.
Created Wed Sep 1 16:42:20 2004 on bee with info_to_html version 0.9.6.