object flags extends Enumeration {
      val Public = Value(5, "public");
      val Private = Value(4, "private");
      val Protected = Value(6, "protected");
      val Final = Value(7, "final");
    }
  
    class Entity {
      var flags0 : Int = ...;
      def flags = flags.Set32(flags0);
    } 
  
    val e : Entity = ...;
  
    if (e.flags.contains(flags.Private))
      e.flags0 = (e.flags | flags.Final).underlying;