嵌套枚举的最佳方法是通过Swift中的switch语句进行访问？

enum Location {
    enum Top {
      case Left
      case Right
      case Center
    }
    enum Bottom {
      case Left
      case Right
      case Center
    }
    enum Left {
      case Top
      case Bottom
      case Center
    }
    enum Right {
      case Top
      case Bottom
      case Center
    }
    enum Center {
      case Center
    }
  }

如果我尝试用它运行一个switch语句,那么所有的枚举都不会出现,如果我尝试列出它们,我会收到一个错误：

func switchOverEnum(enumCase: Location) {
  switch enumCase {
  case .Top:
    print("hey this didn't cause an error whoops no it did")
  }
}

错误是：在“位置”类型中找不到枚举案例“顶部”.

现在有一个问题here的版本,根据最有用的答案,应该这样做：

enum Location {
    enum TopLocations {
      case Left
      case Right
      case Center
    }
    enum BottomLocations {
      case Left
      case Right
      case Center
    }
    enum LeftLocations {
      case Top
      case Bottom
      case Center
    }
    enum RightLocations {
      case Top
      case Bottom
      case Center
    }
    enum CenterLocations {
      case Top
      case Bottom
      case Left
      case Right
      case Center
    }
    case Top(TopLocations)
    case Bottom(BottomLocations)
    case Left(LeftLocations)
    case Right(RightLocations)
    case Center(CenterLocations)
  }

哪个完全有效,但看起来有点笨重,或者不优雅,或者不像Swift一样.这真的是最好的方式吗？

enum HorizontalPosition {
    case Left
    case Right
    case Center
}

enum VerticalPosition {
    case Top
    case Bottom
    case Center
}

typealias Location = (horizontal: HorizontalPosition, vertical: VerticalPosition)

let aLocation = Location(horizontal: .Left, vertical: .Bottom)

switch aLocation {

case (.Left, .Bottom): print ("left bottom")
case (.Center, .Center): print ("center center")
default: print ("everything else")
}