Re: [PATCH] Add a warning for invalid function casts

[Martin Sebor <msebor at gmail dot com>]

On 10/12/2017 05:52 AM, Pedro Alves wrote:
> On 10/11/2017 03:57 AM, Martin Sebor wrote:
> > [X] This can be function that takes an argument of an incomplete
> > type, such as:
> >
> >   struct Incomplete;
> >   typedef void Uncallable (struct Incomplete);
> >
> > Any function can safely be converted to Uncallable* without
> > the risk of being called with the wrong arguments.  The only
> > way to use an Uncallable* is to explicitly convert it to
> > a pointer to a function that can be called.
>
> OOC, did you consider trying to get something like that added
> to C proper, to some standard header?  I don't imagine that it'd
> be much objectionable, and having a standard type may help
> tooling give better diagnostics and suggestions.

Yes.  In light of this discussion I am thinking it might be
worthwhile to bring up the issue of generic function pointers
with WG14 for C2X.

Martin