[PATCH] D45179: [libc++] Add _LIBCPP_ENABLE_NODISCARD and _LIBCPP_NODISCARD_EXT to allow pre-C++2a [[nodiscard]]

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

In https://reviews.llvm.org/D45179#1225911, @EricWF wrote:

> I don't think it ever landed. I'll try to get it in this week.


What does this need?
Is there some changes missing still?
Or this simply needs to be committed (and bots watched?)


https://reviews.llvm.org/D45179