[swift-evolution] Change `repeat` to loop indefinitely if no while clause is present

[Harlan Haskins]

You could always do your control flow with goto’s anyway…

func foo() {
  var i = 0
  func goto(_ label: String = "entry") {
    switch label {
    case "entry":
      print("beginning loop…")
      goto("cond")
    case "cond":
      goto(i < 10 ? "body" : "end")
    case "body":
      i += 1
      print("\(i)")
      goto("cond")
    case "end":
      break
    default: break
    }
  }
  goto()
}

Apologies,
Harlan

> On May 10, 2016, at 2:05 PM, Taras Zakharko via swift-evolution <swift-evolution at swift.org> wrote:
> 
> When I need a loop with complex control flow that does not fit into the classical while {} or repeat {} while structure, I use this:
> 
> do_stuff: do {
>  …
>  continue do_stuff
> } 
> 
> This pattern explicit and allows very complex control flow patterns without the drawbacks of the unrestricted goto construct. 
> 
> Therefore I don’t see utility with having a repeat {} without while clause. 
> 
> Best, 
> 
> Taras
> 
> 
>> On 10 May 2016, at 22:39, Dominik Pich via swift-evolution <swift-evolution at swift.org> wrote:
>> 
>> 
>>>> On May 10, 2016, at 3:30 PM, Tyler Cloutier via swift-evolution <swift-evolution at swift.org> wrote:
>>>> 
>>>> Secondly it’s a very simple way of introducing new programmers to loops. It’s IMHO more clear to a new programmer that repeat will just repeat indefinitely vs while true.
>>> 
>>> This point seems strange to me - why teach a new programmer about loops by first showing them a looping construct they should probably never use in actual practice until they really know what they’re doing?
>> totally agree… it would be a bad first introduction, id say :)
>> 
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