temp.scala

temp.scala

sealed trait PacketType { def name: String; def id: Int }
case object disconnect extends PacketType { val name = "disconnect"; val id = 0 }
case object connect extends PacketType { val name = "connect"; val id = 1 }
case object heartbeat extends PacketType { val name = "heartbeat"; val id = 2 }
case object message extends PacketType { val name = "message"; val id = 3 }
case object Json extends PacketType { val name = "json"; val id = 4 }
case object event extends PacketType { val name = "event"; val id = 5 }
case object ack extends PacketType { val name = "ack"; val id = 6 }
case object error extends PacketType { val name = "error"; val id = 7 }
case object noop extends PacketType { val name = "noop"; val id = 8 }

case object NewType extends PacketType {val name = "new"; val id = 9 }

packetType match {
       // case PacketType.error.id
       case error => (Reason(Option(resid).getOrElse("3") toInt), Advise(Option(adid).getOrElse("1") toInt))
       case message => (noreason, noAdvise, None, None, pdata)
       //        case PacketType.ack => (noreason, noAdvise, None, args, None, ackid)
       case json => (noreason, noAdvise, (jsval \ "name").asOpt[String].getOrElse("UNNAMED_EVENT"), jsval \ "args")
       case _ => (noreason, noAdvise)
}


G:\Scala\SocketIOPlay\module\app\socketio\Parser.scala:90: patterns after a variable pattern cannot match (SLS 8.1.1)
[warn] If you intended to match against object error in package socketio, you must use backticks, like: case `error` =>
[warn]         case error => (Reason(Option(resid).getOrElse("3") toInt), Advise(Option(adid).getOrElse("1") toInt))
[warn]  

______________________________________________
the above gives error because there is a constraint on what case takes as case clases to patt match against. It is there to disambiguate against object (created ones not MODULE$).
So 

packetType match {
       // case PacketType.error.id
       case NewType => "Works"
       case m => s"I am object $m"
}