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node_modules/rxjs/_esm5/internal/operators/count.js

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+/** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
+import * as tslib_1 from "tslib";
+import { Subscriber } from '../Subscriber';
+export function count(predicate) {
+    return function (source) { return source.lift(new CountOperator(predicate, source)); };
+}
+var CountOperator = /*@__PURE__*/ (function () {
+    function CountOperator(predicate, source) {
+        this.predicate = predicate;
+        this.source = source;
+    }
+    CountOperator.prototype.call = function (subscriber, source) {
+        return source.subscribe(new CountSubscriber(subscriber, this.predicate, this.source));
+    };
+    return CountOperator;
+}());
+var CountSubscriber = /*@__PURE__*/ (function (_super) {
+    tslib_1.__extends(CountSubscriber, _super);
+    function CountSubscriber(destination, predicate, source) {
+        var _this = _super.call(this, destination) || this;
+        _this.predicate = predicate;
+        _this.source = source;
+        _this.count = 0;
+        _this.index = 0;
+        return _this;
+    }
+    CountSubscriber.prototype._next = function (value) {
+        if (this.predicate) {
+            this._tryPredicate(value);
+        }
+        else {
+            this.count++;
+        }
+    };
+    CountSubscriber.prototype._tryPredicate = function (value) {
+        var result;
+        try {
+            result = this.predicate(value, this.index++, this.source);
+        }
+        catch (err) {
+            this.destination.error(err);
+            return;
+        }
+        if (result) {
+            this.count++;
+        }
+    };
+    CountSubscriber.prototype._complete = function () {
+        this.destination.next(this.count);
+        this.destination.complete();
+    };
+    return CountSubscriber;
+}(Subscriber));
+//# sourceMappingURL=count.js.map