Elvis.scala

object ? {
  implicit def some[A](x: A): ? [A] = new ? (Some(x))
  implicit def wrap[A](opt: Option[A]): ? [A] = new ? (opt)
  implicit def unwrap[A](x: ? [A]): Option[A] = x.option
}
final case class ? [A](private val option: Option[A]) extends AnyVal {
  override def toString = option.toString
  def ? [B] (fun: A => B) : Option[B] = option map fun
  def !! : A = option.get
}

implicit class Elvis[A1](x: => A1) {
  def ?: [A <: A1](opt: Option[A]): A1 = opt getOrElse x
}

var b: ?[String] = "abc"
b.?(_.length)

val l = b.?(_.length) ?: -1
b.!!.length()

b = None
val m = b.?(_.length) ?: -1
b.!!.length()