Fix EsLint Brackets (error markup 'const').

node_modules/rxjs/src/internal/operators/dematerialize.ts

@@ -0,0 +1,75 @@
+import { Operator } from '../Operator';
+import { Observable } from '../Observable';
+import { Subscriber } from '../Subscriber';
+import { Notification } from '../Notification';
+import { OperatorFunction } from '../types';
+
+/**
+ * Converts an Observable of {@link Notification} objects into the emissions
+ * that they represent.
+ *
+ * <span class="informal">Unwraps {@link Notification} objects as actual `next`,
+ * `error` and `complete` emissions. The opposite of {@link materialize}.</span>
+ *
+ * ![](dematerialize.png)
+ *
+ * `dematerialize` is assumed to operate an Observable that only emits
+ * {@link Notification} objects as `next` emissions, and does not emit any
+ * `error`. Such Observable is the output of a `materialize` operation. Those
+ * notifications are then unwrapped using the metadata they contain, and emitted
+ * as `next`, `error`, and `complete` on the output Observable.
+ *
+ * Use this operator in conjunction with {@link materialize}.
+ *
+ * ## Example
+ * Convert an Observable of Notifications to an actual Observable
+ * ```javascript
+ * const notifA = new Notification('N', 'A');
+ * const notifB = new Notification('N', 'B');
+ * const notifE = new Notification('E', undefined,
+ *   new TypeError('x.toUpperCase is not a function')
+ * );
+ * const materialized = of(notifA, notifB, notifE);
+ * const upperCase = materialized.pipe(dematerialize());
+ * upperCase.subscribe(x => console.log(x), e => console.error(e));
+ *
+ * // Results in:
+ * // A
+ * // B
+ * // TypeError: x.toUpperCase is not a function
+ * ```
+ *
+ * @see {@link Notification}
+ * @see {@link materialize}
+ *
+ * @return {Observable} An Observable that emits items and notifications
+ * embedded in Notification objects emitted by the source Observable.
+ * @method dematerialize
+ * @owner Observable
+ */
+export function dematerialize<T>(): OperatorFunction<Notification<T>, T> {
+  return function dematerializeOperatorFunction(source: Observable<Notification<T>>) {
+    return source.lift(new DeMaterializeOperator());
+  };
+}
+
+class DeMaterializeOperator<T extends Notification<any>, R> implements Operator<T, R> {
+  call(subscriber: Subscriber<any>, source: any): any {
+    return source.subscribe(new DeMaterializeSubscriber(subscriber));
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+class DeMaterializeSubscriber<T extends Notification<any>> extends Subscriber<T> {
+  constructor(destination: Subscriber<any>) {
+    super(destination);
+  }
+
+  protected _next(value: T) {
+    value.observe(this.destination);
+  }
+}