That doesn't work. std::weak_ptr is a reference counted pointer matched to std::shared_ptr; there's no concept of weak pointers (i.e. non-owning with dynamic ch

That doesn't work. std::weak_ptr is a reference counted pointer matched to std::shared_ptr; there's no concept of weak pointers (i.e. non-owning with dynamic checks) for std::unique_ptr, which corresponds almost exactly to Rust's Box.