vvviiimmm · January 7, 2019 14:51
diff --git a/adt5.scala b/adt5.scala
 // Scala doesn't have a nice syntax for sum types so
 // it looks like a familiar OOP inheritance tree.
 sealed trait Shape

 // But don't get confused: the 'extends' here stands for 'is'
 // relationship, not in a sense of 'extends and overrides methods'.
 // It only says that when you create a Circle it will be of type 'Shape'
 case class Circle(radius: Int) extends Shape

 case class Square(side: Int) extends Shape
	// Scala doesn't have a nice syntax for sum types so
	// it looks like a familiar OOP inheritance tree.
	sealed trait Shape

	// But don't get confused: the 'extends' here stands for 'is'
	// relationship, not in a sense of 'extends and overrides methods'.
	// It only says that when you create a Circle it will be of type 'Shape'
	case class Circle(radius: Int) extends Shape

	case class Square(side: Int) extends Shape