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[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / rxjs / src / internal / operators / materialize.ts

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/materialize.ts b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/materialize.ts
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+import { Operator } from '../Operator';
+import { Observable } from '../Observable';
+import { Subscriber } from '../Subscriber';
+import { Notification } from '../Notification';
+import { OperatorFunction } from '../types';
+
+/**
+ * Represents all of the notifications from the source Observable as `next`
+ * emissions marked with their original types within {@link Notification}
+ * objects.
+ *
+ * <span class="informal">Wraps `next`, `error` and `complete` emissions in
+ * {@link Notification} objects, emitted as `next` on the output Observable.
+ * </span>
+ *
+ * ![](materialize.png)
+ *
+ * `materialize` returns an Observable that emits a `next` notification for each
+ * `next`, `error`, or `complete` emission of the source Observable. When the
+ * source Observable emits `complete`, the output Observable will emit `next` as
+ * a Notification of type "complete", and then it will emit `complete` as well.
+ * When the source Observable emits `error`, the output will emit `next` as a
+ * Notification of type "error", and then `complete`.
+ *
+ * This operator is useful for producing metadata of the source Observable, to
+ * be consumed as `next` emissions. Use it in conjunction with
+ * {@link dematerialize}.
+ *
+ * ## Example
+ * Convert a faulty Observable to an Observable of Notifications
+ * ```ts
+ * import { of } from 'rxjs';
+ * import { materialize, map } from 'rxjs/operators';
+ *
+ * const letters = of('a', 'b', 13, 'd');
+ * const upperCase = letters.pipe(map(x => x.toUpperCase()));
+ * const materialized = upperCase.pipe(materialize());
+ * materialized.subscribe(x => console.log(x));
+ *
+ * // Results in the following:
+ * // - Notification {kind: "N", value: "A", error: undefined, hasValue: true}
+ * // - Notification {kind: "N", value: "B", error: undefined, hasValue: true}
+ * // - Notification {kind: "E", value: undefined, error: TypeError:
+ * //   x.toUpperCase is not a function at MapSubscriber.letters.map.x
+ * //   [as project] (http://1…, hasValue: false}
+ * ```
+ *
+ * @see {@link Notification}
+ * @see {@link dematerialize}
+ *
+ * @return {Observable<Notification<T>>} An Observable that emits
+ * {@link Notification} objects that wrap the original emissions from the source
+ * Observable with metadata.
+ * @method materialize
+ * @owner Observable
+ */
+export function materialize<T>(): OperatorFunction<T, Notification<T>> {
+  return function materializeOperatorFunction(source: Observable<T>) {
+    return source.lift(new MaterializeOperator());
+  };
+}
+
+class MaterializeOperator<T> implements Operator<T, Notification<T>> {
+  call(subscriber: Subscriber<Notification<T>>, source: any): any {
+    return source.subscribe(new MaterializeSubscriber(subscriber));
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+class MaterializeSubscriber<T> extends Subscriber<T> {
+  constructor(destination: Subscriber<Notification<T>>) {
+    super(destination);
+  }
+
+  protected _next(value: T) {
+    this.destination.next(Notification.createNext(value));
+  }
+
+  protected _error(err: any) {
+    const destination = this.destination;
+    destination.next(Notification.createError(err));
+    destination.complete();
+  }
+
+  protected _complete() {
+    const destination = this.destination;
+    destination.next(Notification.createComplete());
+    destination.complete();
+  }
+}