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- 'use strict';
- var $TypeError = require('es-errors/type');
- var ToInt32 = require('../ToInt32');
- var ToUint32 = require('../ToUint32');
- var modulo = require('../modulo');
- // https://262.ecma-international.org/12.0/#sec-numeric-types-number-leftShift
- module.exports = function NumberLeftShift(x, y) {
- if (typeof x !== 'number' || typeof y !== 'number') {
- throw new $TypeError('Assertion failed: `x` and `y` arguments must be Numbers');
- }
- var lnum = ToInt32(x);
- var rnum = ToUint32(y);
- var shiftCount = modulo(rnum, 32);
- return lnum << shiftCount;
- };
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