[Bug c++/82219] [8 Regression] Not wanted warning: "type qualifiers ignored on cast result type" on template instantiation

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82219

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-09-15
     Ever confirmed|0                           |1

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(I added this warning in r248432)

(In reply to Markus Trippelsdorf from comment #2)
> I don't think this warning makes much sense for templates.

It does in general, e.g. we should still warn for static_cast<const T>(0),
but I agree it might be too noisy for static_cast<T>(0) where is_const<T> is
true.