Have an enum bind to a return type of a class hierarchy

Top2.scala

sealed trait Top

object Top {

  final case class A(v: String) extends Top { def a: A = this }

  final case class B(v: String) extends Top { def b: B = this }

  def apply[V <: Top](select: TopEnum[V], value: String): V =
    select match {
      case SelectA => A(value)
      case SelectB => B(value)
    }

}

sealed trait TopEnum[V <: Top] extends Product with Serializable

object TopEnum {
  final case object SelectA extends TopEnum[A]
  final case object SelectB extends TopEnum[B]
}