Lazy readonly property in Swift

Question

While playing a little bit with Swift I tried to write a readonly and lazy initialized property. I quickly wrote that line of code just to learn that it\'s not allowed.

Answer 1

If readonly and private are synonyms for you in this specific case, then you can make the setter private by explicitly declaring it:

private(set) lazy var foo : Int = { return 42 }()

That's a good compromise between immutability and laziness.