gistfile1.scala

case class Month(m: Int)
implicit def IntToMonth(n: Int) = Month(n)
case class YearMonth(y: Int, m: Month) {
  def unapply(in: (Int, Int)): Option[(Int, Month)] = Some(in._1, Month(in._2))
}

YearMonth(2011, Month(1)) match { 
  case YearMonth(2011, 1) => println("now")
  case _ => println("not now") 
}