Option.scala

sealed trait Option[+T]

case object None extends Option[Nothing]

case class Some[@specialized +T](value: T) extends Option[T]

object Option {

  implicit class Ops[A](val opt: Option[A]) extends AnyVal {
    @inline final def get(): A = opt match {
      case Some(x) => x
      case None => throw new NoSuchElementException("None.get")
    }

    @inline final def getOrElse[B >: A] (default: => B): B = opt match {
      case Some(x) => x
      case None => default
    }

    //etc
  }

}