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