[Bug c++/101681] New: PMF comparison to nullptr is not considered a constexpr

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101681

            Bug ID: 101681
           Summary: PMF comparison to nullptr is not considered a
                    constexpr
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
            Blocks: 55004, 101603
  Target Milestone: ---

Take:
template <bool> struct Z { };

struct C
{
    void f();
    Z<&C::f == nullptr> z;
};
---- CUT ---
This should be accepted in C++11 or newer.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101603
[Bug 101603] [meta-bug] pointer to member functions issues