[Bug c++/116160] Rejects repeated using-declaration `using A::x;` [namespace.udecl]

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116160

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-07-31
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like this was a defect in the standard at one point and now it is acepted
and GCC just didn't implement the defect.

https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#36
https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#2663

>From DR 36:
[Accepted at the November, 2020 meeting as part of paper P1787R6 and moved to
DR at the February, 2021 meeting.]



So yes it is valid code after all; just was not until 2021 :).