Rust for safety

C++ Core Guidelines are about a LOT more than memory safety. If you look at only the bits related to memory safety it's much more manageable and people have been working on it for a lot longer. The basic requirement is that you never allow a raw pointer in your code anywhere, and you have a set of smart pointers that encode ownership information. As mentioned above, though, it's almost impossible to make these rules universal. And, I'm not sure I'd call it "easy" (unless you just mean the concept rather than the implementation, which always involves a lot of trade-offs).