import scala.{specialized => spec}

trait GrandParent[@spec(Int) -A] {
  def foo(a:A): Unit
  def bar[B <: A](b:B): Unit = println("grandparent got: %s" format b)
}

trait Parent[@spec(Int) -A] extends GrandParent[A] {
  def foo(a:A) = bar(a)
}

class IntChild extends Parent[Int] {
  override def bar[B <: Int](b:B): Unit = println("int child got: %s" format b)
}

class AnyChild extends Parent[Any] {
  override def bar[B <: Any](b:B): Unit = println("any child got: %s" format b)
}

object Test {
  def main(args:Array[String]) {
    new IntChild().foo(33)
    new AnyChild().foo(33)
  }
}