SE-0279: Multiple Trailing Closures [Amended]

Evolution Proposal Reviews
84

Well, good API does take a lot of iteration. So it'd be fair to say that old API won't play well with new syntax. Still, how about we start with:

func with(
  duration: Double,
  animate: @escaping () -> Void,
  onComplete: ((Bool) -> Void)? = nil)

view.with(duration: 0.0, animate: defeatEnemy, onComplete: updateScore)
view.with(duration: 0.0, animate: defeatEnemy)
  onComplete: { ... }
view.with(duration: 0.0)
  animate: { ... }
  onComplete: { ... }

I'd say the reason I'm advocating for requiring the first label is that the API guideline doesn't need to play guessing game regarding whether the label is being dropped. I think It's a big plus from design perspective.

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