I don't do Rust, but I feel there must be more to it that's missing in your description b/c what you wrote sounds exactly like a C++ smart pointer? With the ex

I don't do Rust, but I feel there must be more to it that's missing in your description b/c what you wrote sounds exactly like a C++ smart pointer? With the exception of the last point (which I can't imagine tacking on in C++) Maybe I'm missing some subtle point?