如何创建深度复制构造器？

class Person {
    var name: String
    var age: Int
    var address: Address
    
    init(name: String, age: Int, address: Address) {
        self.name = name
        self.age = age
        self.address = address
    }
    
    // 深度复制构造器
    init(original: Person) {
        self.name = original.name
        self.age = original.age
        self.address = Address(original: original.address)
    }
}

class Address {
    var street: String
    var city: String
    
    init(street: String, city: String) {
        self.street = street
        self.city = city
    }
    
    // 深度复制构造器
    init(original: Address) {
        self.street = original.street
        self.city = original.city
    }
}

// 创建原始对象
let originalAddress = Address(street: "123 Main St", city: "New York")
let originalPerson = Person(name: "John", age: 30, address: originalAddress)

// 使用深度复制构造器创建新对象
let copiedPerson = Person(original: originalPerson)

// 修改原始对象的属性值
originalPerson.name = "Mike"
originalPerson.address.street = "456 Elm St"

// 打印新对象和原始对象的属性值
print(copiedPerson.name) // 输出 "John"
print(copiedPerson.address.street) // 输出 "123 Main St"