https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66834
--- Comment #6 from Eric Niebler <eric.niebler at gmail dot com> --- Exhaustively overloading Constructible to avoid the kind mismatch and the ambiguity runs into a different problem: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66841 I haven't filed an issue for the ambiguity/partial order problem. Should I, or is that by design? Either the kind mismatch problem needs to be fixed, or issue #66841. Right now I don't seem to have a way to express what I'm trying to express.
