On Nov 1, 2016, at 11:42 PM, Zhao Xin via swift-users <swift-users at swift.org> wrote: > > I have already give a workable implementation above. Your implementation assume \(x) is always %@x. What does it do when given -- to use an example from the swift book: "\(multiplier) times 2.5 is \(Double(multiplier) * 2.5)”