Cannot understand this position... a non-nullable pointer is pretty much just a normal pointer but the compiler checks if you have tested for null. In rust (and

Cannot understand this position... a non-nullable pointer is pretty much just a normal pointer but the compiler checks if you have tested for null. In rust (and I believe Swift) optional references also have the same size as normal pointer. In some version of non-nullables you only need checks for dereferencing and not for other handling.