https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104347
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Oh clang does not implement alias deduction even in C++20 mode. So yes this is still valid C++20.
pinskia at gcc dot gnu.org via Gcc-bugs Thu, 03 Feb 2022 01:19:52 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104347
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Oh clang does not implement alias deduction even in C++20 mode. So yes this is still valid C++20.