[libcxx-commits] [libcxx] [libc++] Applied `[[nodiscard]]` to some general utilities (PR #169322)

[A. Jiang via libcxx-commits]

frederick-vs-ja wrote:

Is it intended to add `[[nodiscard]]` to `hash` in another PR? (Related to a recent PR adding C++ `hash` specializations to `chrono` types.)

https://github.com/llvm/llvm-project/pull/169322