[libcxx-commits] [libcxx] [libc++] Implement P3168R2: Give optional range support (PR #149441)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne requested changes to this pull request.

Thanks a lot for the patch! This seems to check most of the boxes for what we're usually looking in a patch, which is great. I do have some comments and a few requests for changes.

https://github.com/llvm/llvm-project/pull/149441