[libcxx-commits] [libcxx] [libcxx] adds ranges::fold_left_with_iter and ranges::fold_left (PR #75259)

[Konstantin Varlamov via libcxx-commits]

https://github.com/var-const requested changes to this pull request.

Finished the first pass. This looks pretty good, just a few comments.

https://github.com/llvm/llvm-project/pull/75259