[libcxx-commits] [libcxx] [libcxx] Implement C++20 std::chrono::is_clock, std::chrono::is_clock_v (PR #160607)

[Hristo Hristov via libcxx-commits]

H-G-Hristov wrote:

> Implemented [[_time.traits.is.clock_]](https://eel.is/c++draft/time.traits.is.clock) from [P0355R7](https://wg21.link/p0355r7).
> 
> This patch implements the C++20 feature `is_clock` and `is_clock_v` based on the documentation [on cppreference](https://en.cppreference.com/w/cpp/chrono/is_clock.html)
> 
> It doesn't seem like we track this particular feature in #99982, but it's necessary to implement.

Would it make sense to create a sub-task to track this item in #99982?

https://github.com/llvm/llvm-project/pull/160607