[clang-tools-extra] [llvm] [clang] [libcxx] [libcxx] adds ranges::fold_left_with_iter and ranges::fold_left (PR #75259)

[Christopher Di Bella via cfe-commits]

cjdb wrote:

> > I see @var-const has "requested changes" set, but I feel we've addressed the one unresolved comment of his.
> 
> @EricWF In fact, this patch changed quite significantly since I last looked at it (based on your feedback, I believe), so I would have appreciated being able to do another round of review before this was merged.

That is fair. My understanding is that Eric was trying to balance respecting that you might have feedback with me struggling to switch off while OOO, if a PR is still in my "active context".

I ended up coming back into the office early, and prioritised applying your feedback as a result (see #76534). Please do make further commentary as necessary.

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