[Bug c++/116160] [DR36] Rejects repeated using-declaration `using A::x;` [namespace.udecl]

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

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

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Oh yes GCC does not currently implement P1787R6 (PR 98939) . This explains most
of this really.

P1787R6 has huge implications across the compiler which is one of the reasons
why it has not be done yet.