| import { Subscriber } from '../Subscriber'; | 
| export function isEmpty() { | 
|     return (source) => source.lift(new IsEmptyOperator()); | 
| } | 
| class IsEmptyOperator { | 
|     call(observer, source) { | 
|         return source.subscribe(new IsEmptySubscriber(observer)); | 
|     } | 
| } | 
| 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 |