[Bug libstdc++/96416] address_of() is broken by static_assert in pointer_traits

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96416

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2020-11-11
     Ever confirmed|0                           |1
   Target Milestone|---                         |10.3

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
On reading this again, I think the implementation should be required to check
whether the specialization pointer_­traits<Ptr>​ would be well-formed as part
of checking the expression pointer_­traits<Ptr>​::​to_­address(p).

So it's unnecessarily awkward, but still the implementation's job to do that.