SimpleStructExample.swift

enum FruitType: String {
    case fuji, gala, crispin
}

struct Fruit {
    var type: FruitType
    let expirationDate: Date
}

var apple = Fruit(type: .fuji, expirationDate: Date())
let appleCopy = apple

apple.type = .gala // change apple type

print(apple.type) // gala
print(appleCopy.type) // fuji