[Bug libstdc++/66998] not_fn invocation is not SFINAE friendly

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66998

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Sep  3 14:36:03 2015
New Revision: 227448

URL: https://gcc.gnu.org/viewcvs?rev=227448&root=gcc&view=rev
Log:
Make std::experimental::not_fn SFINAE-friendly.

        PR libstdc++/66998
        * include/experimental/functional (_Not_fn): Add exception
        specifications and non-deduced return types.
        (not_fn): Add exception specification and wrap pointer-to-member.
        * testsuite/experimental/functional/not_fn.cc: Test in SFINAE context
        and test pointer-to-member.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/experimental/functional
    trunk/libstdc++-v3/testsuite/experimental/functional/not_fn.cc