import {Operator} from '../Operator';
import {Subscriber} from '../Subscriber';
import {Subscription} from '../Subscription';
import {Observable} from '../Observable';
/**
* Returns an Observable that mirrors the source Observable, but will call a specified function when
* the source terminates on complete or error.
* @param {function} finallySelector function to be called when source terminates.
* @returns {Observable} an Observable that mirrors the source, but will call the specified function on termination.
*/
export function _finally<T>(finallySelector: () => void): Observable<T> {
return this.lift(new FinallyOperator(finallySelector));
}
class FinallyOperator<T> implements Operator<T, T> {
constructor(private finallySelector: () => void) {
}
call(subscriber: Subscriber<T>): Subscriber<T> {
return new FinallySubscriber(subscriber, this.finallySelector);
}
}
class FinallySubscriber<T> extends Subscriber<T> {
constructor(destination: Subscriber<T>, finallySelector: () => void) {
super(destination);
this.add(new Subscription(finallySelector));
}
}
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