gistfile1.txt

abstract class MyList{
  def toList : List[Int] = this match {
    case Nope => Nil
    case Cons(x, y) => x :: y.toList
  }

  override def equals(that : Any) = that match {
    case (that : MyList) => this.toList == that.toList; 
    case _ => false;
  }  
}

case class Cons(x : Int, y : MyList) extends MyList;
case object Nope extends MyList;

object Test{
  def main(args : Array[String]){
    println(Nope.toList)
  }
}