memory-layout.swift

import Cocoa

var str = "Hello, playground"
let ptr = UnsafeRawPointer(str)

let origin = CGPoint(x: 0, y: 0)
var other = origin
other.x += 10
var another = origin
another.y += 5

var addressO = UnsafeMutablePointer<CGPoint>(&other)
var addressA = UnsafeMutablePointer<CGPoint>(&another)

func swapPoint(pointA : inout CGPoint, pointB : inout CGPoint) {
    let temp = pointA
    pointA = pointB
    pointB = temp
}

swapPoint(pointA: &other, pointB: &another)

var addressO1 = UnsafeMutablePointer<CGPoint>(&other)
var addressA2 = UnsafeMutablePointer<CGPoint>(&another)

print(other, another)