import { Subscriber } from '../Subscriber'; export function isEmpty() { return (source) => source.lift(new IsEmptyOperator()); } class IsEmptyOperator { call(observer, source) { return source.subscribe(new IsEmptySubscriber(observer)); } } /** * We need this JSDoc comment for affecting ESDoc. * @ignore * @extends {Ignored} */ class IsEmptySubscriber extends Subscriber { constructor(destination) { super(destination); } notifyComplete(isEmpty) { const destination = this.destination; destination.next(isEmpty); destination.complete(); } _next(value) { this.notifyComplete(false); } _complete() { this.notifyComplete(true); } } //# sourceMappingURL=isEmpty.js.map