[Bug c++/71484] Class with implicit public constructor triggers `-Wctor-dtor-privacy`

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71484

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Kyle J Strand from comment #0)
> A class whose only user-declared methods are `private`, but which *does*
> have an implicit public constructor, can trigger `-Wctor-dtor-privacy`.
> 
> See http://stackoverflow.com/q/33157248/1858225 for discussion and sample
> code.
> 
> The offending code is copied here for convenience:
> 
>     struct foo
>     {
>       private:
>         static int test(void) { return 3; };
>     };

That's by design, and is the documented behaviour of the warning. Nothing can
ever call that static function.