[libcxx-commits] [libcxx] [libc++] Granularize includes of <optional> (PR #213433)

[Nikolas Klauser via libcxx-commits]

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@@ -687,21 +687,65 @@ filesystem typeinfo
 filesystem utility
 filesystem variant
 filesystem version
+flat_map atomic
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philnik777 wrote:

Looks like in some headers it has only been included since some version of C++. In these cases you should also put a `_LIBCPP_STD_VER >= <whatever>` in the include condition.

https://github.com/llvm/llvm-project/pull/213433