[libcxx-commits] [libcxx] [libc++] Implement LWG3940: std::expected<void, E>::value() also needs E to be copy constructible (PR #71819)

[Mark de Wever via libcxx-commits]

https://github.com/mordante requested changes to this pull request.

@PragmaTwice There are some review comments still open. Do you have time to address these? Then we can merge this patch.

https://github.com/llvm/llvm-project/pull/71819