On use of C99 __func__ macro

[Guillaume Dargaud]

Hello all,
Is it the same thing to do those two things:

#define WHERE printf("We are in %s", __func__)
void Function(void) {
WHERE;
}

And this:

void Function(void) {
#define WHERE printf("We are in %s", __func__)
WHERE;
}

 

[vippstar]

Hello all,
Is it the same thing to do those two things:

#define WHERE printf("We are in %s", __func__)
void Function(void) {
WHERE;

}

And this:

void Function(void) {
#define WHERE printf("We are in %s", __func__)
WHERE;

}

There's no __func__ in C99.

 

[Björn Paetzel]

On Dec 5, 1:29 pm, "Guillaume Dargaud"

Yes. Both expands to:

void Function(void) {
printf("We are in %s", __func__);

}

There's no __func__ in C99.

There is.

6.4.2.2 #1 says:

The identifier __func__ shall be implicitly declared by the translator
as if, immediately following the opening brace of each function
definition, the declaration

static const char __func__[] = "function-name";

appeared, where function-name is the name of the lexically- enclosing
function.

 

[Richard Tobin]

Is it the same thing to do those two things:

#define WHERE printf("We are in %s", __func__)
void Function(void) {
WHERE;
}

And this:

void Function(void) {
#define WHERE printf("We are in %s", __func__)
WHERE;
}

Yes, because __func__ is required to be like a variable, rather than
a preprocessor macro.

-- Richard

 

[santosh]

There's no __func__ in C99.

C & V please.

 

[Jalapeno]

C & V please.- Hide quoted text -

Why it's right here:

 

[vippstar]

C & V please.

I answered from memory.
Can't always be right on usenet

 

[Neil Booth]

Yes, because __func__ is required to be like a variable, rather than
a preprocessor macro.

Not "because": even if it were a macro the answer would still be yes.

Neil.

 

[Richard Tobin]

Yes, because __func__ is required to be like a variable, rather than
a preprocessor macro.

[/QUOTE]

Not "because": even if it were a macro the answer would still be yes.

Um yes. I should have said "... rather than some magic thing that
gets replaced when it is first encountered in the text".

-- Richard

 

[Guillaume Dargaud]

Not "because": even if it were a macro the answer would still be yes.

Um yes. I should have said "... rather than some magic thing that
gets replaced when it is first encountered in the text".

Thanks, that sums it up nicely.

 

[Tor Rustad]

There's no __func__ in C99.

Just for the record, there is a __func__ in C99, ref. 6.4.2.2.