[Bug c++/65642] [5 Regression] [C++11] GCC rejects valid constant expression

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65642

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #3)
> Created attachment 35214 [details]
> pr65642.patch
> 
> Untested patch for example 1 and 3.

1 and 2.  3 is different.