[libcxx-commits] [libcxx] Make C++ 20 std::midpoint compatible with libc++ (PR #74217)

[Louis Dionne via libcxx-commits]

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

Thanks for the patch! I have a few small comments but this is close.

https://github.com/llvm/llvm-project/pull/74217