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

[Louis Dionne via libcxx-commits]

ldionne wrote:

Per discussion with @huixie90 just now, it seems like the PR originator might not be active anymore, so I'd encourage @huixie90 to take over the patch by applying the latest review comments and rebasing onto `main`. We can then get its review finished and landed with Co-authored-by for attribution.

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