[libcxx-commits] [libcxx] [libc++] Implement P2988R12: `std::optional<T&>` (PR #155202)

[A. Jiang via libcxx-commits]

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frederick-vs-ja wrote:

Why isn't this a `.compile.pass.cpp`? We don't test anything that related to runtime behavior here.

https://github.com/llvm/llvm-project/pull/155202