Swift: convert range to array

protocol ArrayRepresentable {
    typealias ArrayType
    
    func toArray() -> ArrayType[]
}

extension Range : ArrayRepresentable {
    func toArray() -> T[] {
        return T[](self)
    }
}



(1..5).toArray() // => [1, 2, 3, 4]

(-2.0..2.0).toArray() // => [-2.0, -1.0, 0.0, 1.0]

Swift: generic function to convert a sequence to an array

func toArray<S : Sequence>(seq: S) -> Array<S.GeneratorType.Element> {
    return Array<S.GeneratorType.Element>(seq)
}


toArray(1..5) // => [1, 2, 3, 4]

toArray(-2.0..2.0) // => [-2.0, -1.0, 0.0, 1.0]