[libcxx-commits] [libcxx] [libc++] Deprecate the C++20 synchronization library before C++20 (PR #86410)

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EricWF wrote:

I would argue this is a unfortunate use for the deprecation warning, given that in the future the thing is not deprecated, we're just deprecating backwards support for it?

I would also be careful with this because synchronization is one of those things that we may want to use internally prior to C++20.

https://github.com/llvm/llvm-project/pull/86410