22 lines
655 B
JavaScript
22 lines
655 B
JavaScript
'use strict';
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var $TypeError = require('es-errors/type');
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var IteratorComplete = require('./IteratorComplete');
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var IteratorNext = require('./IteratorNext');
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var isIteratorRecord = require('../helpers/records/iterator-record');
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// https://262.ecma-international.org/15.0/#sec-iteratorstep
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module.exports = function IteratorStep(iteratorRecord) {
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if (!isIteratorRecord(iteratorRecord)) {
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throw new $TypeError('Assertion failed: `iteratorRecord` must be an Iterator Record'); // step 1
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}
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var result = IteratorNext(iteratorRecord); // step 1
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var done = IteratorComplete(result); // step 2
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return done === true ? false : result; // steps 3-4
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};
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