OOInFPStyle.scala

object World extends App {
  val pnt = Point(10, 10)
 
  val str: String = pnt(toString)
  val x: Int = pnt(getX)
  val pnt2: Point = pnt(setX)(20)
  val pnt3: Point = pnt(setXY)(20, 19)
 
  println(str)
  println(x)
  println(pnt2)
  println(pnt3)
 
  def toString(point: Point): String = point.toString
 
  /** Sets only x */
  def setX(point: Point)(newX: Int) = point.copy(x = newX)
 
  /** Sets x and y */
  def setXY(point: Point)(newXY: (Int, Int)): Point = point.copy(x = newXY._1, y = newXY._2)
 
  /** Gets x */
  def getX(point: Point): Int = point.x
}
 
case class Point(x: Int, y: Int) {
  def apply[A](f: Point => A): A = f(this)
}