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

[A. Jiang via libcxx-commits]

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@@ -26,7 +26,8 @@
 
 #if _LIBCPP_HAS_LOCALIZATION
 #  include <__locale>
-#  include <optional>
+#  include <__optional/nullopt_t.h>
+#  include <__optional/optional.h>
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frederick-vs-ja wrote:

We also need to (unconditionally) include `<__cstddef/size_t.h>` in this file.

I dropped [NFC] from the PR title as this PR is not quite NFC.

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