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trait Foo[T] { val foo: T}
class A extends Foo[Unit]{
lazy val foo = println("Unit: called A.foo")
}
class B extends Foo[Unit]{
val foo = println("Unit: called B.foo")
}
trait Bar[T] { def foo: T}
class C extends Bar[Unit]{
lazy val foo = println("Unit: called C.foo")
}
class D extends Bar[Unit]{
def foo = println("Unit: called D.foo")
}
object Test extends App {
val a: Foo[Unit] = new A
a.foo
a.foo
val b: Foo[Unit] = new B
b.foo
b.foo
val c: Bar[Unit] = new C
c.foo
c.foo
val d: Bar[Unit] = new D
d.foo
d.foo
}
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