I guess you could argue that 'null' refers to the '1' in a sum type 'T + 1'. I still think 'unit' is the most precise term though, especially seeing as Rust doe

I guess you could argue that 'null' refers to the '1' in a sum type 'T + 1'. I still think 'unit' is the most precise term though, especially seeing as Rust doesn't have structural sum types. `None` is the closest we get to null.