Swift enum raw value: not working with CGFloat = -1.0

Question

What does this not work?

enum Aspect : CGFloat {
    case Clockwise = 1.0
    case Anticlockwise = -1.0
}

On Anticlockwise line I\'m told t

Answer 1

That sounds like a bug. However it seems to work if you omit the decimal part:

enum Aspect : CGFloat {
    case Clockwise = 1
    case Anticlockwise = -1
}