Re: [PING^2] [C/C++] PR c/4076 -Wunused doesn't warn about static function only called by itself

["Manuel López-Ibáñez" <lopezibanez at gmail dot com>]

On 15/03/07, Nathan Sidwell <nathan@codesourcery.com> wrote:
> Manuel López-Ibáñez wrote:
>
> > Index: gcc/cp/semantics.c
> > ===================================================================
> > --- gcc/cp/semantics.c        (revision 122472)
> > +++ gcc/cp/semantics.c        (working copy)
> > @@ -2852,7 +2852,8 @@ finish_id_expression (tree id_expression
> >         if (TREE_CODE (first_fn) == TEMPLATE_DECL)
> >           first_fn = DECL_TEMPLATE_RESULT (first_fn);
> >
> > -       if (!really_overloaded_fn (decl))
> > +       /* Recursive call does not count as usage.  */
> > +       if (!really_overloaded_fn (decl) && decl != current_function_decl)
> >           mark_used (first_fn);
> >
> >         if (!template_arg_p
>
> what about the other mark_used earlier on in that function:
>
>        if (scope)
>         {
>           decl = (adjust_result_of_qualified_name_lookup
>                   (decl, scope, current_class_type));
>
>           if (TREE_CODE (decl) == FUNCTION_DECL)
>             mark_used (decl);
>
> why not similarly protect that?  the other c++ bits are ok.
>
> nathan

I could but I was not able to construct a case where it was necessary.
How can a static function make a scoped recursive call? Sorry my
knowledge of C++ is not so good.

Cheers,

Manuel.