lazyLeaks.swift

import Foundation

struct ExpensiveType {
    init(name: String) {
        print("This is expensive: \(name)")
    }
}

class MyType {
    
    lazy var prop: ExpensiveType = {
        print(self)
        return ExpensiveType(name: "E5")
    }()
    
    deinit {
        print("Deiniting MyType")
    }
}

var t: MyType? = MyType()
t = nil