Recursive type parameters in kotlin

Question

I want to write something like that in Kotlin.

open class View
 where P:Presenter {
    val presenter: P = ...
}

open class          


        

Answer 1

The standard way (called F-bounded polymorphism) is

open class View<V: View<V, P>, P: Presenter<out V>> { ... }

It may make more sense to put out elsewhere here, depending on the specifics:

open class View<out V: View<V, P>, out P: Presenter<V>> { ... }