SWIFT

swift isMemberOf

class Animal {}
class Dog : Animal {}
class Cat : Animal {}

let c = Cat()

c is Dog // false
c is Cat // true
c is Animal // true

// In Swift => 3:
type(of: c) == Cat.self // true
type(of: c) == Animal.self // false

// In Swift 2:
c.dynamicType == Cat.self // true
c.dynamicType == Animal.self // false