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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));
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