[libcxx-commits] [libcxx] [libc++] Implement P2988R12: `std::optional<T&>` (PR #155202)

[A. Jiang via libcxx-commits]

https://github.com/frederick-vs-ja commented:

Looks mostly fine to me. Could you update the branch (together with addressing the review comments) to see whether CI passes?

https://github.com/llvm/llvm-project/pull/155202