1

Let's say I have a function

func something(a: SomeType, b: (AnotherType) -> YetAnotherType) {
  // ...
}

Can I get the type of a or b so I can use it in a declaration?

Instead of writing

  let test: SomeType?
  let block: (AnotherType) -> YetAnotherType = { .. }

I would like to write something along the lines of:

let test: typeOf(#selector(something), at: 0)
let block: typeOf(#selector(something), at: 1) = { .. }

Also something similar for the return type would be nice.

Basically those types can get a bit verbose, I'm looking how to write less and clearer..

2

Such dynamic usage isn't possible in Swift (I'll leave it to others to explain exactly why). But if you need less verbose types, use a typealias, especially for closure types.