extension3.scala

extension[T] (t: T)
  infix inline def |>[B](block: T => B): B = block(t)

  infix inline def <|(block: T => Unit): T =
    block(t)
    t

enum Opt[+T]:
  case Empty
  case Box(t: T)

  def getOrElse[B >: T](b: => B): B = this match
    case Empty => b
    case Box(t) => t

  infix def ||[B >: T](b: => B): B = getOrElse(b)


@main
def main(): Unit =
  val a = Opt.Empty

  (a || 4000)
    <| println
    |> (_ + 10000)
    |> println