https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80187
--- Comment #5 from Tim Shen <timshen at gcc dot gnu.org> --- (In reply to Ambroz Bizjak from comment #4) > Oh wait sorry, that doesn't solve it (yet), the variant_storage_byte would > still have a default copy constructor that copies the byte member. Yeah, your solution seems to move the triviality forwarding down to the individual elements, not in the variant level. However, I'm not sure if it helps on the forwarding itself. You may still need the 4-layer inheritance on each byte.
