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

[nicole mazzuca via libcxx-commits]

strega-nil wrote:

Okay, this should be complete (ish) with testing - ready for real review!

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