[Bug c/105369] Improved diagnostics for code from statement expressions documentation [C component]

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105369

--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #0)
> Anyways, that's it for the plain-C code from that page; I'll open a separate
> bug for the C++ if it turns out that that needs one, too.

OK I opened bug 105370 for that.

(In reply to Andrew Pinski from comment #2)
> I don't think there is a way to get a warning for the abs really and maybe
> not even wanted.

OK so forget that part I guess; how about the rest of it?