How to make an enum conform to a protocol in Swift?

Question

Swift documentation says that classes, structs, and enums can all conform to protocols, and I can get to a point where they all conform. But I can

Answer 1

I came up with this

protocol ExampleProtocol {
    var simpleDescription: String { get }
    mutating func adjust()
}

enum Seat: ExampleProtocol {
    case WindowSeat, MiddleSeat, AisleSeat

    var simpleDescription : String {
        switch self {
        case .WindowSeat:
            return "Window Seat"
        case .MiddleSeat:
            return "Middle Seat"
        case .AisleSeat:
            return "Aisle Seat"
        }
    }

    mutating func adjust() {
        switch self {
        case .WindowSeat:
            self = .MiddleSeat
        case .MiddleSeat:
            self = . AisleSeat
        case .AisleSeat:
            self = .WindowSeat
        }
    }
}

var seat = Seat.MiddleSeat
print(seat.simpleDescription) // Middle Seat
seat.adjust()
print(seat.simpleDescription) // Aisle Seat