main
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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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File size:
562 bytes
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| 1 | 'use strict';
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| 2 |
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| 3 | var $TypeError = require('es-errors/type');
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| 4 |
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| 5 | var ToInt32 = require('../ToInt32');
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| 6 | var ToUint32 = require('../ToUint32');
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| 7 | var modulo = require('../modulo');
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| 8 |
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| 9 | // https://262.ecma-international.org/12.0/#sec-numeric-types-number-leftShift
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| 10 |
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| 11 | module.exports = function NumberLeftShift(x, y) {
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| 12 | if (typeof x !== 'number' || typeof y !== 'number') {
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| 13 | throw new $TypeError('Assertion failed: `x` and `y` arguments must be Numbers');
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| 14 | }
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| 15 |
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| 16 | var lnum = ToInt32(x);
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| 17 | var rnum = ToUint32(y);
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| 18 |
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| 19 | var shiftCount = modulo(rnum, 32);
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| 20 |
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| 21 | return lnum << shiftCount;
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| 22 | };
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