[libcxx-commits] [libcxx] [libc++] Implement `ranges::fold_left_first` and `ranges::fold_left_first_with_iter` (PR #180214)

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c8ef wrote:

Hi @frederick-vs-ja, when you get a chance, could you help continue reviewing this patch? After that, I plan to move on to `fold_right` and ultimately wrap up P2322!

https://github.com/llvm/llvm-project/pull/180214