| import { Observable } from '../Observable'; |
| /** |
| * An Observable that emits no items to the Observer and never completes. |
| * |
| * ![](never.png) |
| * |
| * A simple Observable that emits neither values nor errors nor the completion |
| * notification. It can be used for testing purposes or for composing with other |
| * Observables. Please note that by never emitting a complete notification, this |
| * Observable keeps the subscription from being disposed automatically. |
| * Subscriptions need to be manually disposed. |
| * |
| * ## Example |
| * ### Emit the number 7, then never emit anything else (not even complete) |
| * ```ts |
| * import { NEVER } from 'rxjs'; |
| * import { startWith } from 'rxjs/operators'; |
| * |
| * function info() { |
| * console.log('Will not be called'); |
| * } |
| * const result = NEVER.pipe(startWith(7)); |
| * result.subscribe(x => console.log(x), info, info); |
| * |
| * ``` |
| * |
| * @see {@link Observable} |
| * @see {@link index/EMPTY} |
| * @see {@link of} |
| * @see {@link throwError} |
| */ |
| export declare const NEVER: Observable<never>; |
| /** |
| * @deprecated Deprecated in favor of using {@link NEVER} constant. |
| */ |
| export declare function never(): Observable<never>; |