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node_modules/rxjs/_esm2015/internal/operators/withLatestFrom.js

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+import { OuterSubscriber } from '../OuterSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+export function withLatestFrom(...args) {
+    return (source) => {
+        let project;
+        if (typeof args[args.length - 1] === 'function') {
+            project = args.pop();
+        }
+        const observables = args;
+        return source.lift(new WithLatestFromOperator(observables, project));
+    };
+}
+class WithLatestFromOperator {
+    constructor(observables, project) {
+        this.observables = observables;
+        this.project = project;
+    }
+    call(subscriber, source) {
+        return source.subscribe(new WithLatestFromSubscriber(subscriber, this.observables, this.project));
+    }
+}
+class WithLatestFromSubscriber extends OuterSubscriber {
+    constructor(destination, observables, project) {
+        super(destination);
+        this.observables = observables;
+        this.project = project;
+        this.toRespond = [];
+        const len = observables.length;
+        this.values = new Array(len);
+        for (let i = 0; i < len; i++) {
+            this.toRespond.push(i);
+        }
+        for (let i = 0; i < len; i++) {
+            let observable = observables[i];
+            this.add(subscribeToResult(this, observable, undefined, i));
+        }
+    }
+    notifyNext(_outerValue, innerValue, outerIndex) {
+        this.values[outerIndex] = innerValue;
+        const toRespond = this.toRespond;
+        if (toRespond.length > 0) {
+            const found = toRespond.indexOf(outerIndex);
+            if (found !== -1) {
+                toRespond.splice(found, 1);
+            }
+        }
+    }
+    notifyComplete() {
+    }
+    _next(value) {
+        if (this.toRespond.length === 0) {
+            const args = [value, ...this.values];
+            if (this.project) {
+                this._tryProject(args);
+            }
+            else {
+                this.destination.next(args);
+            }
+        }
+    }
+    _tryProject(args) {
+        let result;
+        try {
+            result = this.project.apply(this, args);
+        }
+        catch (err) {
+            this.destination.error(err);
+            return;
+        }
+        this.destination.next(result);
+    }
+}
+//# sourceMappingURL=withLatestFrom.js.map