123456789101112131415161718192021222324252627282930313233343536373839404142434445 |
- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $SyntaxError = GetIntrinsic('%SyntaxError%');
- var $TypeError = GetIntrinsic('%TypeError%');
- var $Promise = GetIntrinsic('%Promise%', true);
- var callBound = require('call-bind/callBound');
- var CreateIterResultObject = require('./CreateIterResultObject');
- var IteratorComplete = require('./IteratorComplete');
- var IteratorValue = require('./IteratorValue');
- var PromiseResolve = require('./PromiseResolve');
- var Type = require('./Type');
- var $then = callBound('Promise.prototype.then', true);
- // https://262.ecma-international.org/10.0/#sec-asyncfromsynciteratorcontinuation
- module.exports = function AsyncFromSyncIteratorContinuation(result) {
- if (Type(result) !== 'Object') {
- throw new $TypeError('Assertion failed: Type(O) is not Object');
- }
- if (arguments.length > 1) {
- throw new $SyntaxError('although AsyncFromSyncIteratorContinuation should take a second argument, it is not used in this implementation');
- }
- if (!$Promise) {
- throw new $SyntaxError('This environment does not support Promises.');
- }
- return new Promise(function (resolve) {
- var done = IteratorComplete(result); // step 2
- var value = IteratorValue(result); // step 4
- var valueWrapper = PromiseResolve($Promise, value); // step 6
- // eslint-disable-next-line no-shadow
- var onFulfilled = function (value) { // steps 8-9
- return CreateIterResultObject(value, done); // step 8.a
- };
- resolve($then(valueWrapper, onFulfilled)); // step 11
- }); // step 12
- };
|