[libcxx-commits] [libcxx] [libc++][ranges] implement `ranges::shift_left` (PR #83231)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 requested changes to this pull request.

Thanks for the patch! From a correctness point of view this looks quite good. The performance can be improved for a few cases, but nothing major. I haven't looked at the tests closely yet.

https://github.com/llvm/llvm-project/pull/83231