Swift protocol

[onmyway133]

Extending generic struct with inheritance protocol. WORK 🎉 . But autocompletes shows all methods 😢

Type of expression is ambiguous without more context

protocol A {

}

protocol B: A {

}

protocol C: B {

}

struct Stack<T> {

}

extension UIView: B {

}

extension Stack where T: A {
    func a() {
        print("f")
    }
}

extension Stack where T: B {
    func b() {
        a()
    }
}

extension Stack where T: C {
    func c() {
        print("e")
    }
}

[onmyway133]

Protocol associatedtype with array. WORKS for f, not for g 😠

Cannot convert value of type '[Self.Action]' to expected argument type '[Actionable]'

protocol Actionable {

}

protocol M: class {
    associatedtype Action: Actionable
    var views: [Action] { get set }
}

func f(view: Actionable) {

}

func g(views: [Actionable]) {

}

extension M {
    func add(view: Action) {
        views.append(view)
        f(view)
        g(views)
    }
}

Oops, it is the same error for generic struct, too 😢

protocol Actionable {

}

struct M<T: Actionable> {
  var views: [T]
}

func g(views: [Actionable]) {

}

extension M {
  func add() {
    g(views)
  }
}

[onmyway133]

Use protocol as a generic constraint 🐼

Protocol 'ActionThatHaveCAAnimation' can only be used as a generic constraint because it has Self or associated type requirements

[onmyway133]

https://www.youtube.com/watch?v=XWoNjiSPqI8&feature=youtu.be
https://stackoverflow.com/questions/24888560/usage-of-protocols-as-array-types-and-function-parameters-in-swift
https://llamagraphics.com/content/combining-swift-protocols
http://stackoverflow.com/questions/24926310/what-does-protocol-can-only-be-used-as-a-generic-constraint-because-it-has
http://stackoverflow.com/questions/37504091/how-to-conform-to-protocol-using-subclass
http://stackoverflow.com/questions/37514020/how-to-make-extension-to-protocol-using-associatedtype-and-array