Kotlin 1.1 bound callable references

Since Kotlin 1.1 added bound callable references, binding observables to UI actions can be simplified significantly, mainly using normal functions as actions instead of vals with the type Func1<Observable<T>, Subscription>.

Quick example:


interface MainView {
    ...
    fun signInSuccess(success: Success)
    ...
}

class Presenter {
    ...
    signInResult
        .filter { it is Success }
        .map { it as Success }
        .bind(view::signInSuccess)
    ...
}

fun <T> Observable<T>.bind(action: (T) -> Unit): Subscription =
    observeOn(AndroidSchedulers.mainThread()).subscribe(action)

What are your thoughts on this?

artem-zinnatullin / RxUi

Kotlin 1.1 bound callable references #29