swift5.0 闭包循环处理

class Test
{
    var name:String
    
    //weak 弱引用
    //unowned无主引用
     lazy var data:()->Void = {[weak self]() ->Void in
        print(self!.name)
    }
    
    init(name:String) {
        self.name = name
    }
    
    deinit {
        print("Test的示列释放:\(self.name)")
    }
}

var t:Test? = Test(name: "hello")

t!.data()

t = nil