import Foundation

class ProductFactory {
    var items = 8
}

struct Product {
    let identifier: Int
    let name: String
    let inStock: Bool
    let factory = ProductFactory()
}

// To pass reference of `carToy` into `withUnsafePointer` you need to change let into var
var productA = Product(identifier: 1234,
                     name: "Remote car",
                     inStock: true)

withUnsafePointer(to: &productA) { print("Product A address \($0)") } // 0x00007ffee156bb90

var productB = productA

withUnsafePointer(to: &productB) { print("Product B address \($0)") } // 0x00007ffee156bb48

// Let's create empty struct
struct EmptyProduct {
}

var emptyProductStruct = EmptyProduct()

withUnsafePointer(to: &emptyProductStruct) { print("Empty product address \($0)") } // 0x0000000128080880

var emptyProductStructCopy = emptyProductStruct

withUnsafePointer(to: &emptyProductStructCopy) { print("Empty product copy address \($0)") } // 0x0000000128080880