 	//	the next value in the sequence of nodes.
 	//	:returns:	Queue.Generator
 	//
-	public func makeIterator() -> Queue.Iterator {
+	public func makeIterator() -> Iterator {
 		return list.makeIterator()
 	}
 

		:description:	Constructor.
	*/
	public init() {
		list = DoublyLinkedList<Element>()
	}

	//

	mutating public func removeAll() {
		list.removeAll()
	}

    public static func +(lhs: Queue, rhs: Queue) -> Queue<Element> {
        var q = Queue<Element>()
        for x in lhs {
            q.enqueue(x)
        }
        for x in rhs {
            q.enqueue(x)
        }
        return q
    }

    public static func +=(lhs: inout Queue, rhs: Queue) {
        for x in rhs {
            lhs.enqueue(x)
        }
    }
}
