[libcxx-commits] [libcxx] [libc++] Create a `constexpr` hash to use during constant evaluation (PR #214946)

[A. Jiang via libcxx-commits]

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frederick-vs-ja wrote:

I think `constexpr` in the name is already meaning that it is intentionally used in both constant evaluation and runtime. If we want to add something that is consteval-only, we should probably have `consteval` in its name.
```suggestion
```

https://github.com/llvm/llvm-project/pull/214946