[Bug c++/79502] [c++1z] [[nodiscard]] attribute ignored for class template

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79502

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Latest untested patch at:
https://gcc.gnu.org/ml/gcc-patches/2017-02/msg01051.html
The earlier one caused bootstrap failures (this one includes testcases from
that as well as adjusted testcases from that, one fails also with GCC 6).