https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114298
--- Comment #1 from Michael Kenzel <michael.kenzel at gmail dot com> --- I just learned that this was apparently only added in C++23 (P2711 [1]), so I was likely a bit too quick to open this issue… [1]: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2711r1.html
