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node_modules/rxjs/operators/mergeScan.d.ts

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+import { Operator } from '../Operator';
+import { Observable } from '../Observable';
+import { Subscriber } from '../Subscriber';
+import { Subscription } from '../Subscription';
+import { OuterSubscriber } from '../OuterSubscriber';
+import { InnerSubscriber } from '../InnerSubscriber';
+import { OperatorFunction } from '../interfaces';
+/**
+ * Applies an accumulator function over the source Observable where the
+ * accumulator function itself returns an Observable, then each intermediate
+ * Observable returned is merged into the output Observable.
+ *
+ * <span class="informal">It's like {@link scan}, but the Observables returned
+ * by the accumulator are merged into the outer Observable.</span>
+ *
+ * @example <caption>Count the number of click events</caption>
+ * const click$ = Rx.Observable.fromEvent(document, 'click');
+ * const one$ = click$.mapTo(1);
+ * const seed = 0;
+ * const count$ = one$.mergeScan((acc, one) => Rx.Observable.of(acc + one), seed);
+ * count$.subscribe(x => console.log(x));
+ *
+ * // Results:
+ * 1
+ * 2
+ * 3
+ * 4
+ * // ...and so on for each click
+ *
+ * @param {function(acc: R, value: T): Observable<R>} accumulator
+ * The accumulator function called on each source value.
+ * @param seed The initial accumulation value.
+ * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of
+ * input Observables being subscribed to concurrently.
+ * @return {Observable<R>} An observable of the accumulated values.
+ * @method mergeScan
+ * @owner Observable
+ */
+export declare function mergeScan<T, R>(accumulator: (acc: R, value: T) => Observable<R>, seed: R, concurrent?: number): OperatorFunction<T, R>;
+export declare class MergeScanOperator<T, R> implements Operator<T, R> {
+    private accumulator;
+    private seed;
+    private concurrent;
+    constructor(accumulator: (acc: R, value: T) => Observable<R>, seed: R, concurrent: number);
+    call(subscriber: Subscriber<R>, source: any): any;
+}
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export declare class MergeScanSubscriber<T, R> extends OuterSubscriber<T, R> {
+    private accumulator;
+    private acc;
+    private concurrent;
+    private hasValue;
+    private hasCompleted;
+    private buffer;
+    private active;
+    protected index: number;
+    constructor(destination: Subscriber<R>, accumulator: (acc: R, value: T) => Observable<R>, acc: R, concurrent: number);
+    protected _next(value: any): void;
+    private _innerSub(ish, value, index);
+    protected _complete(): void;
+    notifyNext(outerValue: T, innerValue: R, outerIndex: number, innerIndex: number, innerSub: InnerSubscriber<T, R>): void;
+    notifyComplete(innerSub: Subscription): void;
+}