[Bug c++/100976] [C++23] Make constexpr reference temp constexpr

[jason at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100976

--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
  constexpr const int &r = 42;
  static_assert(r == 42);