[libcxx-commits] [libcxx] [libc++] Partially implement P2846R6: `reserve_hint` (PR #206385)

[Hristo Hristov via libcxx-commits]

Zingam wrote:

> this

No worries. I know the feeling. I think the implementation PR is almost LGTM, it just needs some polishing.
I even addopted it in my PRs but it's better to land this first.

https://github.com/llvm/llvm-project/pull/206385