[libcxx-commits] [PATCH] D90257: [libc++] Use the using_if_exists attribute when provided

[Louis Dionne via Phabricator via libcxx-commits]

ldionne added a comment.

Note that once this is in, we can also start dropping existing `#if`s in the headers to workaround various declarations missing in the underlying C stdlib, as long as we require a sufficiently recent Clang.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D90257/new/

https://reviews.llvm.org/D90257