https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77337
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org, | |jason at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- This is rejected starting with r239268, P0170R1 implementation. clang++ doesn't seem to implement that part of C++17 from what I can see. Whether the test is valid C++17 or not I'll defer to others.