Capping.scala

object Main {
  implicit class Capping[+A](value: A) {
    def cap[B >: A](limit: B)(implicit ordering: Ordering[B]): B = {
      if (ordering.lteq(value, limit)) value else limit
    }
  }

  def main(args: Array[String]) {
    println( 99.cap(100)) // =>  99
    println(101.cap(100)) // => 100
  }
}