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Swiftの再帰的enumとパターンマッチでズンドコ
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| import Foundation | |
| enum Zundoko: CustomStringConvertible { | |
| case Start | |
| indirect case Zun(Zundoko) | |
| indirect case Doko(Zundoko) | |
| indirect case Kiyoshi(Zundoko) | |
| var description: String { | |
| switch self { | |
| case Start: return "スタート！" | |
| case Zun(let zd): return "\(zd)\nズン" | |
| case Doko(let zd): return "\(zd)\nドコ" | |
| case Kiyoshi(let zd): return "\(zd)\nキ・ヨ・シ！" | |
| } | |
| } | |
| func zundoko() -> Zundoko { | |
| if case .Doko(.Zun(.Zun(.Zun(.Zun)))) = self { | |
| return .Kiyoshi(self) | |
| } | |
| return (arc4random_uniform(2) > 0) ? Zun(self).zundoko() : Doko(self).zundoko() | |
| } | |
| } | |
| print(Zundoko.Start.zundoko()) |
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