[libcxx-commits] [libcxx] [libc++] Make optional::iterator experimental (PR #173470)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne commented:

LGTM but we should update the release note. Otherwise, we're claiming that we implement a paper that we don't out of the box.

https://github.com/llvm/llvm-project/pull/173470