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What language is this? I'd expect a language with a ? -type would not use an Optional type at all. In languages such as OCaml, Haskell and Rust this of course
by _flux 9mo ago
What language is this? I'd expect a language with a ? -type would not use an Optional type at all.
In languages such as OCaml, Haskell and Rust this of course works as you say.
- _rend 9mo agoThis 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.
- _flux 9mo agoRight, so it's not like a union type Type | Null. Then naturally it works the same way as in the languages I listed.