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object ShapeTest extends Application {
class Point(x : int, y : int) {
override def toString() = "[" + x + "," + y + "]"
}
abstract class Shape {
def draw() : unit
}
class Line(s : Point, e : Point) extends Shape {
def draw() : unit = { Console.println("draw line " + s + "," + e) }
}
abstract class Foo {
type T <: Object
def show(o : T) : unit
def print() : unit = {Console.println("in Foo")}
}
abstract class ShapeFoo extends Foo {
type T <: Shape
def show(o : T) : unit = { o.draw() }
override def print() : unit = {Console.println("in ShapeFoo")}
}
class LineFoo extends ShapeFoo {
type T = Line
override def print() : unit = {Console.println("in LineFoo")}
}
val p1 = new Point(1,4)
val p2 = new Point(12, 28)
val l1 = new Line(p1, p2)
val l = new ShapeFoo{ // ** //
type T = Line // ** //
override def print() : unit = {Console.println("in LineFoo")} // ** //
}
l.show(l1) // ** //
}
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