// Example 1

protocol ShapeCreator {
    static func objectWith(area: Int) -> Self
}

enum TheCreator: ShapeCreator {
    case objectWith(area: Int)
}

TheCreator.objectWith(area: 99)

// Example 2

protocol ShapeCreator {
    static var defaultCreator: Self { get }
    func createStuff()
}

enum CreatorWithDefault: ShapeCreator {
    case defaultCreator

    func createStuff()
}

CreatorWithDefault.defaultCreator.createStuff()

// Example 3
// This probably is a bit of a stretch

protocol ShapeCreator {
    static var defaultArea: Int
}

enum Default: Int, ShapeCreator {
    case defaultArea = 100
}