[libcxx-commits] [libcxx] [libc++] Make forward_list constexpr as part of P3372R3 (PR #129435)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne approved this pull request.

LGTM. Let's leave until EOD for the discussions with @philnik777 to settle but I think additional changes can also be done in a follow-up patch if needed.

https://github.com/llvm/llvm-project/pull/129435