[Bug libstdc++/80939] Various helper function templates in <variant> incorrectly marked constexpr

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80939

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Jul 25 18:04:32 2017
New Revision: 250533

URL: https://gcc.gnu.org/viewcvs?rev=250533&root=gcc&view=rev
Log:
PR libstdc++/80939 Remove unmeetable constexpr specifiers

Backport from mainline
2017-06-02  Jonathan Wakely  <jwakely@redhat.com>

        PR libstdc++/80939
        * include/std/variant (__erased_ctor, __erased_assign, __erased_swap)
        (__erased_hash): Remove constexpr specifier and qualify calls to
        __ref_cast.
        (__erased_dtor): Remove constexpr specifier and use _Destroy.

Modified:
    branches/gcc-7-branch/libstdc++-v3/ChangeLog
    branches/gcc-7-branch/libstdc++-v3/include/std/variant