NotNilOperator.swift

// Source: https://twitter.com/AirspeedSwift/status/618546432954474497

prefix func !<T>(t: T?) -> T {
    return t ?? Array<Int8>(count: sizeof(T), repeatedValue: 0).withUnsafeBufferPointer {
        UnsafePointer($0.baseAddress).memory
    }
}

prefix func !<T: ExtensibleCollectionType>(t: T?) -> T {
    return t ?? T()
}

let i: Int = !nil
let s: String = !nil
let r: Range<Int> = !nil
let a: Array<Int> = !nil
!(!nil)