1

Hi. When I write code I usually structure my functions like this:

func ex () -> Either<Int, String> {
   var i = Int.random(in: 0 ... 10)
   func skip () {
      i += 1
      //if i > 8 {  return! .right("special") }
      //return as if this was the parent function execution scope
   }
   return .right(double())
}

Writing logic in this style have benefits because local state of the function is managed implicitly and code is cleaner. I was recently writing a parser and found this kind of code easier to understand.
I can define it using throwing or set skip to return optional value, but I find these options suboptimal.

Any advice you can give about code like this?

2

Swift is pretty dead set on making control flow explicit.

In this case, I think the best you can do is make your functions throwing, and throw from the nested function.