[libcxx-commits] [libcxx] [libc++] P2641R4: Checking if a `union` alternative is active (`std::is_within_lifetime`) (PR #107450)

[Louis Dionne via libcxx-commits]

ldionne wrote:

Gentle ping @MitalAshok, it looks like we're very close to being able to merge this :)

https://github.com/llvm/llvm-project/pull/107450