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

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/throwIfEmpty.ts b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/throwIfEmpty.ts
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+++ b/.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/src/internal/operators/throwIfEmpty.ts
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+import { EmptyError } from '../util/EmptyError';
+import { Observable } from '../Observable';
+import { Operator } from '../Operator';
+import { Subscriber } from '../Subscriber';
+import { TeardownLogic, MonoTypeOperatorFunction } from '../types';
+
+/**
+ * If the source observable completes without emitting a value, it will emit
+ * an error. The error will be created at that time by the optional
+ * `errorFactory` argument, otherwise, the error will be {@link EmptyError}.
+ *
+ * ![](throwIfEmpty.png)
+ *
+ * ## Example
+ * ```ts
+ * import { fromEvent, timer } from 'rxjs';
+ * import { throwIfEmpty, takeUntil } from 'rxjs/operators';
+ *
+ * const click$ = fromEvent(document, 'click');
+ *
+ * click$.pipe(
+ *   takeUntil(timer(1000)),
+ *   throwIfEmpty(
+ *     () => new Error('the document was not clicked within 1 second')
+ *   ),
+ * )
+ * .subscribe({
+ *   next() { console.log('The button was clicked'); },
+ *   error(err) { console.error(err); }
+ * });
+ * ```
+ *
+ * @param errorFactory A factory function called to produce the
+ * error to be thrown when the source observable completes without emitting a
+ * value.
+ */
+export function throwIfEmpty <T>(errorFactory: (() => any) = defaultErrorFactory): MonoTypeOperatorFunction<T> {
+  return (source: Observable<T>) => {
+    return source.lift(new ThrowIfEmptyOperator(errorFactory));
+  };
+}
+
+class ThrowIfEmptyOperator<T> implements Operator<T, T> {
+  constructor(private errorFactory: () => any) {
+  }
+
+  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
+    return source.subscribe(new ThrowIfEmptySubscriber(subscriber, this.errorFactory));
+  }
+}
+
+class ThrowIfEmptySubscriber<T> extends Subscriber<T> {
+  private hasValue: boolean = false;
+
+  constructor(destination: Subscriber<T>, private errorFactory: () => any) {
+    super(destination);
+  }
+
+  protected _next(value: T): void {
+    this.hasValue = true;
+    this.destination.next(value);
+  }
+
+  protected _complete() {
+    if (!this.hasValue) {
+      let err: any;
+      try {
+        err = this.errorFactory();
+      } catch (e) {
+        err = e;
+      }
+      this.destination.error(err);
+    } else {
+        return this.destination.complete();
+    }
+  }
+}
+
+function defaultErrorFactory() {
+  return new EmptyError();
+}