+++ /dev/null
-/** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
-import * as tslib_1 from "tslib";
-import { Subscriber } from '../Subscriber';
-export function scan(accumulator, seed) {
- var hasSeed = false;
- if (arguments.length >= 2) {
- hasSeed = true;
- }
- return function scanOperatorFunction(source) {
- return source.lift(new ScanOperator(accumulator, seed, hasSeed));
- };
-}
-var ScanOperator = /*@__PURE__*/ (function () {
- function ScanOperator(accumulator, seed, hasSeed) {
- if (hasSeed === void 0) {
- hasSeed = false;
- }
- this.accumulator = accumulator;
- this.seed = seed;
- this.hasSeed = hasSeed;
- }
- ScanOperator.prototype.call = function (subscriber, source) {
- return source.subscribe(new ScanSubscriber(subscriber, this.accumulator, this.seed, this.hasSeed));
- };
- return ScanOperator;
-}());
-var ScanSubscriber = /*@__PURE__*/ (function (_super) {
- tslib_1.__extends(ScanSubscriber, _super);
- function ScanSubscriber(destination, accumulator, _seed, hasSeed) {
- var _this = _super.call(this, destination) || this;
- _this.accumulator = accumulator;
- _this._seed = _seed;
- _this.hasSeed = hasSeed;
- _this.index = 0;
- return _this;
- }
- Object.defineProperty(ScanSubscriber.prototype, "seed", {
- get: function () {
- return this._seed;
- },
- set: function (value) {
- this.hasSeed = true;
- this._seed = value;
- },
- enumerable: true,
- configurable: true
- });
- ScanSubscriber.prototype._next = function (value) {
- if (!this.hasSeed) {
- this.seed = value;
- this.destination.next(value);
- }
- else {
- return this._tryNext(value);
- }
- };
- ScanSubscriber.prototype._tryNext = function (value) {
- var index = this.index++;
- var result;
- try {
- result = this.accumulator(this.seed, value, index);
- }
- catch (err) {
- this.destination.error(err);
- }
- this.seed = result;
- this.destination.next(result);
- };
- return ScanSubscriber;
-}(Subscriber));
-//# sourceMappingURL=scan.js.map