block6.kt

@JvmOverloads
fun <R> suspendFunction(
    onSuccees: Consumer<R?>,
    onFailure: Consumer<Throwable?>,
    dispatcher: CoroutineDispatcher = Dispatchers.Default
): Continuation<R> = object : Continuation<R> {
    override val context: CoroutineContext
        get() = dispatcher

    override fun resumeWith(result: Result<R>) {
        if (result.isSuccess && result.isFailure.not()) {
            onSuccees.accept(result.getOrNull())
        } else {
            onFailure.accept(result.exceptionOrNull())
        }
    }
}