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

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inquisitivecrystal wrote:

I don't know what this would look like. I'd appreciate either a more detailed breakdown of what you want or a reference to an existing test that does have such comments.

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