[Bug c++/90881] -Wunused-value false positive in SFINAE context

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90881

--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Sat Jun 22 14:43:00 2019
New Revision: 272585

URL: https://gcc.gnu.org/viewcvs?rev=272585&root=gcc&view=rev
Log:
        PR c++/90881 - bogus -Wunused-value in unevaluated context.
        * cvt.c (convert_to_void): Don't emit unused warnings in
        an unevaluated context.

        * g++.dg/cpp0x/Wunused-value1.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/Wunused-value1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cvt.c
    trunk/gcc/testsuite/ChangeLog