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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/96416] address_of() is broken by static_assert in
 pointer_traits
Date: Wed, 11 Nov 2020 17:46:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96416

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 che=
ck
whether the specialization pointer_=C2=ADtraits<Ptr>=E2=80=8B would be well=
-formed as part
of checking the expression pointer_=C2=ADtraits<Ptr>=E2=80=8B::=E2=80=8Bto_=
=C2=ADaddress(p).

So it's unnecessarily awkward, but still the implementation's job to do tha=
t.=