gistfile1.pde

// mutually recursive listener and broadcaster types with
// f-bounded polymorphism
class ListenerType<L extends ListenerType<L, B>, B extends BroadcasterType<L, B>> {
}
class BroadcasterType<L extends ListenerType<L, B>, B extends BroadcasterType<L, B>> {
}
class Listener extends ListenerType<Listener, Broadcaster> {
}
class Broadcaster extends BroadcasterType<Listener, Broadcaster> {
}