"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 = _asyncIterator;
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function _asyncIterator(iterable) {
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var method,
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async,
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sync,
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retry = 2;
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if (typeof Symbol !== "undefined") {
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async = Symbol.asyncIterator;
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sync = Symbol.iterator;
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}
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while (retry--) {
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if (async && (method = iterable[async]) != null) {
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return method.call(iterable);
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}
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if (sync && (method = iterable[sync]) != null) {
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return new AsyncFromSyncIterator(method.call(iterable));
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}
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async = "@@asyncIterator";
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sync = "@@iterator";
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}
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throw new TypeError("Object is not async iterable");
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}
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function AsyncFromSyncIterator(s) {
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AsyncFromSyncIterator = function (s) {
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this.s = s;
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this.n = s.next;
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};
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AsyncFromSyncIterator.prototype = {
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s: null,
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n: null,
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next: function () {
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return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments));
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},
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return: function (value) {
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var ret = this.s.return;
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if (ret === undefined) {
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return Promise.resolve({
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value: value,
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done: true
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});
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}
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return AsyncFromSyncIteratorContinuation(ret.apply(this.s, arguments));
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},
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throw: function (value) {
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var thr = this.s.return;
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if (thr === undefined) return Promise.reject(value);
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return AsyncFromSyncIteratorContinuation(thr.apply(this.s, arguments));
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}
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};
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function AsyncFromSyncIteratorContinuation(r) {
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if (Object(r) !== r) {
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return Promise.reject(new TypeError(r + " is not an object."));
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}
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var done = r.done;
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return Promise.resolve(r.value).then(function (value) {
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return {
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value: value,
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done: done
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};
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});
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}
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return new AsyncFromSyncIterator(s);
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}
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