swift（四）swift的广义匹配

//swift的广义匹配
let x =
switch x {
    case ...:
    println("个位数")
    case ...:
    println("十位数")
    default:
    println("其他")

}

let point = (,)
switch point
{
case (,):
    println("0坐标")
case (...,...):
    println("x y一到十")
    case (_,):
    println("x轴")
default:
    println("其他")
}

// Value Bindings
switch point
{

case (let x, ):
    println(x)
case let( x,  y) where x == -y:
    println("\(x):\(y)")
default:
    println("其他")
}