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codeql-action/node_modules/es-abstract/2020/IsValidIntegerIndex.js
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'use strict'; | |
var GetIntrinsic = require('get-intrinsic'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var IsInteger = require('./IsInteger'); | |
var isNegativeZero = require('../helpers/isNegativeZero'); | |
var typedArrayBuffer = require('typed-array-buffer'); | |
// https://262.ecma-international.org/11.0/#sec-isvalidintegerindex | |
module.exports = function IsValidIntegerIndex(O, index) { | |
// Assert: O is an Integer-Indexed exotic object. | |
typedArrayBuffer(O); // step 1 | |
if (typeof index !== 'number') { | |
throw new $TypeError('Assertion failed: Type(index) is not Number'); // step 2 | |
} | |
if (!IsInteger(index)) { return false; } // step 3 | |
if (isNegativeZero(index)) { return false; } // step 4 | |
if (index < 0 || index >= O.length) { return false; } // step 5 | |
return true; // step 6 | |
}; |