Implementing StringLiteralConvertible on NSURL in Swift 1.1

Question

Here is an older question on the same topic, but it is for Swfit 1.0. In Swift 1.1, the StringLiteralConvertible protocol has changed to use initializers instea

Answer 1

The initializers required by the protocol "StringLiteralConvertible" do not return optionals, so putting a ? after init won't help (even though XCode itself suggests it). But all initializers for NSURL do return optionals, because the parameters may not result in a valid URL. And you have to call one of the super.init initializers in all custom NSURL initializers. So it is no longer possible to have NSURL implement "StringLiteralConvertible".