Demo.scala

class Rubynizer(n:Any) {
    def to_s = n.toString
    def to_i = {
      if( n.isInstanceOf[Char] ) n.asInstanceOf[Char].toString.toInt
      else if( n.isInstanceOf[String] ) n.asInstanceOf[String].toInt
      else throw new NumberFormatException()
    }
}
class Bakanizer(n:Int) {
    implicit def rubynize(n:Any) = new Rubynizer(n)
    def ! = baka(n)

   private def baka(n: Int): String = {
    if( n < 10 ) if( n % 3 == 0 ) ichi(n) else n.to_s
    else if( n < 99 ){
      val s = n.to_s
      val k2 = s(0).to_i
      val k1 = s(1).to_i
      if( n % 3 == 0 || k2 == 3 || k1 == 3 ) ju(k2) + ichi(k1)
      else s
    }else throw new Exception("2桁まで")
  }
  private val ju:List[String]
    = List("","じゅ～","に～じゅ","さぁ～んじゅ","よぉ～んじゅ"
          ,"ごぉ～じゅ","ろぉくじゅ","しぃちじゅ","はぁ～ちじゅ","きゅ～じゅ")
  private val ichi:List[String]
    = List("","えぃち","にぃ","さぁん","しぃ","ごぉ"
          ,"ろぉく","ひぃち","はぁち","きゅ～")
}

class NiceGuy(s:java.lang.String) {
    def さん = new NiceGuy(s)

    def ありがとう = s match{
        case "まっちゃ" => throw new ノーサンキューまっちゃだいふくモゾがゆいわよException()
        case _ => s + "さん曰く「どういたしまして！」"
    }
    class ノーサンキューまっちゃだいふくモゾがゆいわよException extends Exception{
    }
}
implicit def bakanize(n: Int) = new Bakanizer(n)
implicit def foo(s:java.lang.String) = new NiceGuy(s)