Created
October 17, 2014 03:20
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Swift Generic Factory
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| // | |
| // ViewController.swift | |
| // SwiftTest | |
| // | |
| // Created by Josh Holtz on 8/3/14. | |
| // Copyright (c) 2014 Josh Holtz. All rights reserved. | |
| // | |
| import UIKit | |
| class ViewController: UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| var a = Maker<A>().make(); | |
| a?.talk() // Outputs "Aaaaaa" | |
| var b = Maker<B>().make(); | |
| b?.talk() // Outputs "Bbbbbb" | |
| var c = Maker<C>().make(); | |
| c?.talk() // Outputs "Cccccc" | |
| var d = Maker<D>().make(); | |
| d?.talk() // Outputs "Dddddd" | |
| } | |
| } | |
| struct Maker<T:Base> { | |
| func make() -> T? { | |
| return self.dynamicType.bake() | |
| } | |
| private static func bake() -> T? { | |
| return T.create() | |
| } | |
| } | |
| protocol Base { | |
| init(); | |
| func talk() | |
| class func create() -> Self; | |
| } | |
| class A: Base { | |
| required init() {} | |
| func talk() { | |
| println("Aaaaaa") | |
| } | |
| class func create() -> Self { return self() } | |
| } | |
| class B: Base { | |
| required init() {} | |
| func talk() { | |
| println("Bbbbbb") | |
| } | |
| class func create() -> Self { return self() } | |
| } | |
| class C: B { | |
| required init() {} | |
| override func talk() { | |
| println("Cccccc") | |
| } | |
| override class func create() -> Self { return self() } | |
| } | |
| class D: B, Base { | |
| required init() {} | |
| override func talk() { | |
| println("Dddddd") | |
| } | |
| override class func create() -> Self { return self() } | |
| } |
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