[swift-evolution] Proposal: optionally define nested functions elsewhere

[Amir Michail]

The problem with nested functions is that they can make the function containing them very long and hard to read.

So the idea is to separate the body of a nested function from where it is declared.

For example:

func f() {
  var x:Int
  func g(y:String) {
    print(“x=\(x), y=\(y)")
  }  
  ...
}

could be refactored as:

func f() {
  var x:Int
  func g(y:String) // function body elsewhere to avoid clutter in f
  ...
}

func f().g(y:String) {
    print(“x=\(x), y=\(y)")
}