alt Hacker NewsThis is Swift, where Type? is syntax sugar for Optional<Type>. Swift's Optional is a standard sum type, with a lot of syntax sugar and compiler niceties to make common cases easier and nicer to work with.
This is Swift, where Type? is syntax sugar for Optional<Type>. Swift's Optional is a standard sum type, with a lot of syntax sugar and compiler niceties to make common cases easier and nicer to work with.
Right, so it's not like a union type Type | Null. Then naturally it works the same way as in the languages I listed.