[libcxx-commits] [libcxx] [libcxx] P2278R4: implement `{basic_, }const_iterator`, and have `cbegin` et. al. return it (PR #99915)

[A. Jiang via libcxx-commits]

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

I think we can and should just merge the changes in #102301 to this PR. It's less confusing to me to have a unified PR completing this paper (and P2836R1, and several LWG issues).

https://github.com/llvm/llvm-project/pull/99915