title: enum with rawValue and agument in cases
body: <p>I just defined my enum and to each case some arguments are assigned however I wonder why can't I use the rawValue feature anymore</p>
  
  <pre><code>enum test : Int {
      case danial (Int, Double, String)
      case weiLiang(Int, String)
      case KS(Int, String)
      case Eugin(Int, Double, String)
      case sina(Int, Double, String)
  }
  </code></pre>