[swift-evolution] Getting rid of willSet/didSet

[Tino Heth]

> It *is* odd, and I do the described didSet trick *all* the time.
> 
> Stuff like:
The alternative wouldn’t be that complicated:

public class MyView: UIView {
	public var foo: Int {
		set(value) {
			super.foo = value
			setNeedsDisplay()
		}
	}
}

It’s just one line more, but three(!) keywords less that could be removed from the language; and I bet in the wild there are many thousand errors in subclasses of UIViewController that happen because the author didn’t remember wether he has to call super in viewDid…, loadView etc.