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asyncIterator.js45 linesDownload Raw Back to helpers
1function _asyncIterator(r) {2  var n,3    t,4    o,5    e = 2;6  for ("undefined" != typeof Symbol && (t = Symbol.asyncIterator, o = Symbol.iterator); e--;) {7    if (t && null != (n = r[t])) return n.call(r);8    if (o && null != (n = r[o])) return new AsyncFromSyncIterator(n.call(r));9    t = "@@asyncIterator", o = "@@iterator";10  }11  throw new TypeError("Object is not async iterable");12}13function AsyncFromSyncIterator(r) {14  function AsyncFromSyncIteratorContinuation(r) {15    if (Object(r) !== r) return Promise.reject(new TypeError(r + " is not an object."));16    var n = r.done;17    return Promise.resolve(r.value).then(function (r) {18      return {19        value: r,20        done: n21      };22    });23  }24  return AsyncFromSyncIterator = function AsyncFromSyncIterator(r) {25    this.s = r, this.n = r.next;26  }, AsyncFromSyncIterator.prototype = {27    s: null,28    n: null,29    next: function next() {30      return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments));31    },32    "return": function _return(r) {33      var n = this.s["return"];34      return void 0 === n ? Promise.resolve({35        value: r,36        done: !037      }) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));38    },39    "throw": function _throw(r) {40      var n = this.s["return"];41      return void 0 === n ? Promise.reject(r) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));42    }43  }, new AsyncFromSyncIterator(r);44}45module.exports = _asyncIterator, module.exports.__esModule = true, module.exports["default"] = module.exports;