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object Test {
type Color = Int
trait Shape {
override def equals(other: Any) = true
}
trait Bordered extends Shape {
val thickness: Int
override def equals(other: Any) = other match {
case that: Bordered => this.thickness == that.thickness
case _ => false
}
}
trait Colored extends Shape {
val color: Color
override def equals(other: Any) = other match {
case that: Colored => this.color == that.color
case _ => false
}
}
trait BorderedColoredShape extends Shape with Bordered with Colored {
override def equals(other: Any) = other match {
case that: BorderedColoredShape => (
super.equals(that) &&
super[Bordered].equals(that) &&
super[Colored].equals(that))
case _ => false
}
}
val bcs1 = new BorderedColoredShape {
val thickness = 1
val color = 0
}
val bcs2 = new BorderedColoredShape {
val thickness = 2
val color = 0
}
Console.println(bcs1 == bcs1)
Console.println(bcs1 == bcs2)
}
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