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21 lines
655 B
21 lines
655 B
'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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