--- /dev/null
+/** PURE_IMPORTS_START tslib,_OuterSubscriber,_InnerSubscriber,_util_subscribeToResult,_map,_observable_from PURE_IMPORTS_END */
+import * as tslib_1 from "tslib";
+import { OuterSubscriber } from '../OuterSubscriber';
+import { InnerSubscriber } from '../InnerSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+import { map } from './map';
+import { from } from '../observable/from';
+export function switchMap(project, resultSelector) {
+ if (typeof resultSelector === 'function') {
+ return function (source) { return source.pipe(switchMap(function (a, i) { return from(project(a, i)).pipe(map(function (b, ii) { return resultSelector(a, b, i, ii); })); })); };
+ }
+ return function (source) { return source.lift(new SwitchMapOperator(project)); };
+}
+var SwitchMapOperator = /*@__PURE__*/ (function () {
+ function SwitchMapOperator(project) {
+ this.project = project;
+ }
+ SwitchMapOperator.prototype.call = function (subscriber, source) {
+ return source.subscribe(new SwitchMapSubscriber(subscriber, this.project));
+ };
+ return SwitchMapOperator;
+}());
+var SwitchMapSubscriber = /*@__PURE__*/ (function (_super) {
+ tslib_1.__extends(SwitchMapSubscriber, _super);
+ function SwitchMapSubscriber(destination, project) {
+ var _this = _super.call(this, destination) || this;
+ _this.project = project;
+ _this.index = 0;
+ return _this;
+ }
+ SwitchMapSubscriber.prototype._next = function (value) {
+ var result;
+ var index = this.index++;
+ try {
+ result = this.project(value, index);
+ }
+ catch (error) {
+ this.destination.error(error);
+ return;
+ }
+ this._innerSub(result, value, index);
+ };
+ SwitchMapSubscriber.prototype._innerSub = function (result, value, index) {
+ var innerSubscription = this.innerSubscription;
+ if (innerSubscription) {
+ innerSubscription.unsubscribe();
+ }
+ var innerSubscriber = new InnerSubscriber(this, value, index);
+ var destination = this.destination;
+ destination.add(innerSubscriber);
+ this.innerSubscription = subscribeToResult(this, result, undefined, undefined, innerSubscriber);
+ if (this.innerSubscription !== innerSubscriber) {
+ destination.add(this.innerSubscription);
+ }
+ };
+ SwitchMapSubscriber.prototype._complete = function () {
+ var innerSubscription = this.innerSubscription;
+ if (!innerSubscription || innerSubscription.closed) {
+ _super.prototype._complete.call(this);
+ }
+ this.unsubscribe();
+ };
+ SwitchMapSubscriber.prototype._unsubscribe = function () {
+ this.innerSubscription = null;
+ };
+ SwitchMapSubscriber.prototype.notifyComplete = function (innerSub) {
+ var destination = this.destination;
+ destination.remove(innerSub);
+ this.innerSubscription = null;
+ if (this.isStopped) {
+ _super.prototype._complete.call(this);
+ }
+ };
+ SwitchMapSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
+ this.destination.next(innerValue);
+ };
+ return SwitchMapSubscriber;
+}(OuterSubscriber));
+//# sourceMappingURL=switchMap.js.map