在case语句中是否有一种简单的快速匹配类的方法?

I have done this:

我所做的:

func doSomething(anObject: AnyObject)
{
    switch anObject {
    case let myObj as MyClass:
        println("Is a kind of MyClass")
    case let yourObj as YourClass:
        println("Is a kind of YourClass")
    default:
        break
    }
}
func doSomething(an