1 | /** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
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2 | import * as tslib_1 from "tslib";
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3 | import { Subscriber } from '../Subscriber';
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4 | export function count(predicate) {
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5 | return function (source) { return source.lift(new CountOperator(predicate, source)); };
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6 | }
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7 | var CountOperator = /*@__PURE__*/ (function () {
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8 | function CountOperator(predicate, source) {
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9 | this.predicate = predicate;
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10 | this.source = source;
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11 | }
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12 | CountOperator.prototype.call = function (subscriber, source) {
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13 | return source.subscribe(new CountSubscriber(subscriber, this.predicate, this.source));
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14 | };
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15 | return CountOperator;
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16 | }());
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17 | var CountSubscriber = /*@__PURE__*/ (function (_super) {
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18 | tslib_1.__extends(CountSubscriber, _super);
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19 | function CountSubscriber(destination, predicate, source) {
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20 | var _this = _super.call(this, destination) || this;
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21 | _this.predicate = predicate;
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22 | _this.source = source;
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23 | _this.count = 0;
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24 | _this.index = 0;
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25 | return _this;
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26 | }
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27 | CountSubscriber.prototype._next = function (value) {
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28 | if (this.predicate) {
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29 | this._tryPredicate(value);
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30 | }
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31 | else {
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32 | this.count++;
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33 | }
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34 | };
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35 | CountSubscriber.prototype._tryPredicate = function (value) {
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36 | var result;
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37 | try {
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38 | result = this.predicate(value, this.index++, this.source);
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39 | }
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40 | catch (err) {
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41 | this.destination.error(err);
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42 | return;
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43 | }
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44 | if (result) {
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45 | this.count++;
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46 | }
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47 | };
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48 | CountSubscriber.prototype._complete = function () {
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49 | this.destination.next(this.count);
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50 | this.destination.complete();
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51 | };
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52 | return CountSubscriber;
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53 | }(Subscriber));
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54 | //# sourceMappingURL=count.js.map
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