COW.swift

import Foundation
var a = 123
var cpa = a

class Miao {}
var c = Miao()
var cc = c

struct S {}
var s = S()
var cps = s

var likes = ["comdy", "animation", "movies"]
var cpLikes = likes

var str = "str"
var cpStr = str

func address<T: AnyObject>(of object: T) -> String {
    let addr = unsafeBitCast(object, to: Int.self)
    return String(format: "%p", addr)
}

func address(of object: UnsafeRawPointer) -> String {
    let addr = Int(bitPattern: object)
    return String(format: "%p", addr)
}

print("Class")
print(address(of: c))
print(address(of: cc))

print("Int")
print(address(of: &a))
print(address(of: &cpa))

print("Struct")
print(address(of: &s))
print(address(of: &cps))

print("Array")
print(address(of: &likes))
print(address(of: &cpLikes))