1 import { Subscriber } from '../Subscriber';
2 import { rxSubscriber as rxSubscriberSymbol } from '../symbol/rxSubscriber';
3 import { empty as emptyObserver } from '../Observer';
4 import { PartialObserver } from '../types';
6 export function toSubscriber<T>(
7 nextOrObserver?: PartialObserver<T> | ((value: T) => void),
8 error?: (error: any) => void,
9 complete?: () => void): Subscriber<T> {
12 if (nextOrObserver instanceof Subscriber) {
13 return (<Subscriber<T>> nextOrObserver);
16 if (nextOrObserver[rxSubscriberSymbol]) {
17 return nextOrObserver[rxSubscriberSymbol]();
21 if (!nextOrObserver && !error && !complete) {
22 return new Subscriber(emptyObserver);
25 return new Subscriber(nextOrObserver, error, complete);