gistfile1.scala

  val nonIgnoredFields = {
    @annotation.tailrec
    def loop(k: Class[_], fields: List[Array[Field]]): List[Array[Field]] = {
      if (k == null) fields
      else
        loop(k.getSuperclass, k.getDeclaredFields.filterNot(ignoreField _).reverse :: fields)
    }
    loop(klass, Nil).flatten
  }