"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = AsyncGenerator;
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var _OverloadYield = require("OverloadYield");
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function AsyncGenerator(gen) {
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var front, back;
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function send(key, arg) {
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return new Promise(function (resolve, reject) {
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var request = {
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key: key,
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arg: arg,
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resolve: resolve,
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reject: reject,
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next: null
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};
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if (back) {
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back = back.next = request;
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} else {
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front = back = request;
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resume(key, arg);
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}
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});
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}
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function resume(key, arg) {
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try {
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var result = gen[key](arg);
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var value = result.value;
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var overloaded = value instanceof _OverloadYield;
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Promise.resolve(overloaded ? value.v : value).then(function (arg) {
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if (overloaded) {
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var nextKey = key === "return" ? "return" : "next";
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if (!value.k || arg.done) {
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return resume(nextKey, arg);
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} else {
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arg = gen[nextKey](arg).value;
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}
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}
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settle(result.done ? "return" : "normal", arg);
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}, function (err) {
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resume("throw", err);
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});
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} catch (err) {
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settle("throw", err);
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}
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}
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function settle(type, value) {
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switch (type) {
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case "return":
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front.resolve({
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value: value,
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done: true
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});
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break;
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case "throw":
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front.reject(value);
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break;
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default:
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front.resolve({
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value: value,
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done: false
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});
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break;
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}
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front = front.next;
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if (front) {
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resume(front.key, front.arg);
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} else {
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back = null;
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}
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}
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this._invoke = send;
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if (typeof gen.return !== "function") {
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this.return = undefined;
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}
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}
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AsyncGenerator.prototype[typeof Symbol === "function" && Symbol.asyncIterator || "@@asyncIterator"] = function () {
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return this;
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};
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AsyncGenerator.prototype.next = function (arg) {
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return this._invoke("next", arg);
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};
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AsyncGenerator.prototype.throw = function (arg) {
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return this._invoke("throw", arg);
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};
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AsyncGenerator.prototype.return = function (arg) {
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return this._invoke("return", arg);
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};
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//# sourceMappingURL=AsyncGenerator.js.map
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