[Issue 5140] Add __FUNCTION__

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http://d.puremagic.com/issues/show_bug.cgi?id=5140



--- Comment #12 from Don <clugdbug at yahoo.com.au> 2013-01-11 04:52:46 PST ---
(In reply to comment #11)
> (In reply to comment #8)
> > Sorry Andrej, my last comment wasn't a critique of your good work in pull 1462.
> > 
> > (In reply to comment #7)
> > 
> > > but I don't see __FUNCTION__ as conflicting with __function at all. They do two
> > > entirely different things. __FUNCTION__ is a string, whereas __function is an
> > > alias to the function that it's used in.
> > 
> > I agree they are two quite different things, so probably I have to move the
> > request for __function in another enhancement request.
> > 
> > But they are also related, as you can implement anonymous recursion with
> > __FUNCTION__:
> > 
> > 
> > long fact(long n) {
> >     if (n <= 1)
> >         return 1;
> >     else
> >         mixin("return n * " ~ __FUNCTION__ ~ "(n - 1);");
> > }
> > 
> > 
> > So I think introducing __FUNCTION__ will make less likely the introduction of
> > the __function alias. I hope to be wrong.
> 
> Can't __FUNCTION__ be implemented like this:
> 
> __traits(identifier, __function);
> 
> That is, if __function gets implemented.

No. It needs magical treatment when used as a default parameter.

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