[libcxx-commits] [libcxx] [libc++] Implement LWG4072: std::optional comparisons: constrain harder (PR #209968)

[A. Jiang via libcxx-commits]

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frederick-vs-ja wrote:

> Can we just use `requires` instead? The context is C++26?

I'm not sure whether we want the C++26 context, maybe we should test these with `LIBCPP_STATIC_ASSERT` in C++17~23 and `static_assert` since C++26. I think we intend to implement the constraints in C++17 mode.

https://github.com/llvm/llvm-project/pull/209968