PropertyObserver.swift

import Foundation

// Property Observers - `willSet`, `didSet`

// Property observers let you observe the change in the state or value
// of properties and provides single source of truth

// 'didSet' and 'willSet' cannot be provided together with a getter
//  If `set` is provided then it is mandotory to add `get`

class User {
    var name : String {
        didSet {
            print("didSet --> \(name)")
        }
        
        willSet {
            print("willSet --> \(newValue)")
        }
    }
    
    init(name: String) {
        self.name = name
    }
}


let user = User(name: "jarvis")
user.name = "tony"