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45 lines
1.5 KiB
45 lines
1.5 KiB
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var $SyntaxError = require('es-errors/syntax'); |
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var $TypeError = require('es-errors/type'); |
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var isObject = require('es-object-atoms/isObject'); |
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var $Promise = GetIntrinsic('%Promise%', true); |
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var callBound = require('call-bound'); |
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var CreateIteratorResultObject = require('./CreateIteratorResultObject'); |
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var IteratorComplete = require('./IteratorComplete'); |
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var IteratorValue = require('./IteratorValue'); |
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var PromiseResolve = require('./PromiseResolve'); |
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var $then = callBound('Promise.prototype.then', true); |
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// https://262.ecma-international.org/16.0/#sec-asyncfromsynciteratorcontinuation |
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module.exports = function AsyncFromSyncIteratorContinuation(result) { |
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if (!isObject(result)) { |
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throw new $TypeError('Assertion failed: Type(O) is not Object'); |
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} |
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if (arguments.length > 1) { |
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throw new $SyntaxError('although AsyncFromSyncIteratorContinuation should take a second argument, it is not used in this implementation'); |
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} |
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if (!$Promise) { |
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throw new $SyntaxError('This environment does not support Promises.'); |
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} |
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return new $Promise(function (resolve) { |
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var done = IteratorComplete(result); // step 2 |
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var value = IteratorValue(result); // step 4 |
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var valueWrapper = PromiseResolve($Promise, value); // step 6 |
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// eslint-disable-next-line no-shadow |
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var onFulfilled = function (value) { // steps 8-9 |
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return CreateIteratorResultObject(value, done); // step 8.a |
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}; |
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resolve($then(valueWrapper, onFulfilled)); // step 11 |
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}); // step 12 |
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};
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