llvm-project

8d63e899 - [libc++] Avoid including pair in <__functional/hash.h> (#179635)

[libc++] Avoid including pair in <__functional/hash.h> (#179635) We already have `_PairT`, which is just a pair of two `size_t`s, so we might as well use that throughout the file. This avoids the `pair` include altogether, reducing header parse times a bit in some cases.