Nested Types

struct BlackjackCard {

    // nested Suit enumeration
    enum Suit: Character {
        case Spades = "♠", Hearts = "♡", Diamonds = "♢", Clubs = "♣"
    }

    // nested Rank enumeration
    enum Rank: Int {
        case Two = 2, Three, Four, Five, Six, Seven, Eight, Nine, Ten
        case Jack, Queen, King, Ace
        struct Values {
            let first: Int, second: Int?
        }
        var values: Values {
        switch self {
        case .Ace:
            return Values(first: 1, second: 11)
        case .Jack, .Queen, .King:
            return Values(first: 10, second: nil)
        default:
            return Values(first: self.toRaw(), second: nil)
            }
        }
    }

    // BlackjackCard properties and methods
    let rank: Rank, suit: Suit
    var description: String {
    var output = "suit is (suit.toRaw()),"
        output += " value is (rank.values.first)"
        if let second = rank.values.second {
            output += " or (second)"
        }
        return output
    }
}

let theAceOfSpades = BlackjackCard(rank: .Ace, suit: .Spades)
println("theAceOfSpades: (theAceOfSpades.description)")
// prints "theAceOfSpades: suit is ♠, value is 1 or 11”

let heartsSymbol = BlackjackCard.Suit.Hearts.toRaw()
// heartsSymbol is "♡"