1 /** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
2 import * as tslib_1 from "tslib";
3 import { Subscriber } from '../Subscriber';
4 export function pairwise() {
5 return function (source) { return source.lift(new PairwiseOperator()); };
7 var PairwiseOperator = /*@__PURE__*/ (function () {
8 function PairwiseOperator() {
10 PairwiseOperator.prototype.call = function (subscriber, source) {
11 return source.subscribe(new PairwiseSubscriber(subscriber));
13 return PairwiseOperator;
15 var PairwiseSubscriber = /*@__PURE__*/ (function (_super) {
16 tslib_1.__extends(PairwiseSubscriber, _super);
17 function PairwiseSubscriber(destination) {
18 var _this = _super.call(this, destination) || this;
19 _this.hasPrev = false;
22 PairwiseSubscriber.prototype._next = function (value) {
25 pair = [this.prev, value];
32 this.destination.next(pair);
35 return PairwiseSubscriber;
37 //# sourceMappingURL=pairwise.js.map