| | |
| | | export default function _asyncIterator(iterable) { |
| | | var method; |
| | | var method, |
| | | async, |
| | | sync, |
| | | retry = 2; |
| | | |
| | | if (typeof Symbol !== "undefined") { |
| | | if (Symbol.asyncIterator) method = iterable[Symbol.asyncIterator]; |
| | | if (method == null && Symbol.iterator) method = iterable[Symbol.iterator]; |
| | | for ("undefined" != typeof Symbol && (async = Symbol.asyncIterator, sync = Symbol.iterator); retry--;) { |
| | | if (async && null != (method = iterable[async])) return method.call(iterable); |
| | | if (sync && null != (method = iterable[sync])) return new AsyncFromSyncIterator(method.call(iterable)); |
| | | async = "@@asyncIterator", sync = "@@iterator"; |
| | | } |
| | | |
| | | if (method == null) method = iterable["@@asyncIterator"]; |
| | | if (method == null) method = iterable["@@iterator"]; |
| | | if (method == null) throw new TypeError("Object is not async iterable"); |
| | | return method.call(iterable); |
| | | throw new TypeError("Object is not async iterable"); |
| | | } |
| | | |
| | | function AsyncFromSyncIterator(s) { |
| | | function AsyncFromSyncIteratorContinuation(r) { |
| | | if (Object(r) !== r) return Promise.reject(new TypeError(r + " is not an object.")); |
| | | var done = r.done; |
| | | return Promise.resolve(r.value).then(function (value) { |
| | | return { |
| | | value: value, |
| | | done: done |
| | | }; |
| | | }); |
| | | } |
| | | |
| | | return AsyncFromSyncIterator = function AsyncFromSyncIterator(s) { |
| | | this.s = s, this.n = s.next; |
| | | }, AsyncFromSyncIterator.prototype = { |
| | | s: null, |
| | | n: null, |
| | | next: function next() { |
| | | return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments)); |
| | | }, |
| | | "return": function _return(value) { |
| | | var ret = this.s["return"]; |
| | | return void 0 === ret ? Promise.resolve({ |
| | | value: value, |
| | | done: !0 |
| | | }) : AsyncFromSyncIteratorContinuation(ret.apply(this.s, arguments)); |
| | | }, |
| | | "throw": function _throw(value) { |
| | | var thr = this.s["return"]; |
| | | return void 0 === thr ? Promise.reject(value) : AsyncFromSyncIteratorContinuation(thr.apply(this.s, arguments)); |
| | | } |
| | | }, new AsyncFromSyncIterator(s); |
| | | } |