bdde081050
Added test to ensure that release notes are parsed properly Updated to latest dependencies to fix security vulnerability Updated GH Actions Workflow to run test before updating tag Updated README.md to reflect proper whatsnew documentation.
86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
'use strict';
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var GetIntrinsic = require('../GetIntrinsic');
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var $RangeError = GetIntrinsic('%RangeError%');
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var $TypeError = GetIntrinsic('%TypeError%');
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var assign = require('object.assign');
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var isPropertyDescriptor = require('../helpers/isPropertyDescriptor');
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var IsArray = require('./IsArray');
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var IsAccessorDescriptor = require('./IsAccessorDescriptor');
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var IsDataDescriptor = require('./IsDataDescriptor');
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var OrdinaryDefineOwnProperty = require('./OrdinaryDefineOwnProperty');
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var OrdinaryGetOwnProperty = require('./OrdinaryGetOwnProperty');
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var ToNumber = require('./ToNumber');
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var ToString = require('./ToString');
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var ToUint32 = require('./ToUint32');
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var Type = require('./Type');
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// https://www.ecma-international.org/ecma-262/6.0/#sec-arraysetlength
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// eslint-disable-next-line max-statements, max-lines-per-function
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module.exports = function ArraySetLength(A, Desc) {
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if (!IsArray(A)) {
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throw new $TypeError('Assertion failed: A must be an Array');
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}
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if (!isPropertyDescriptor({
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Type: Type,
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IsDataDescriptor: IsDataDescriptor,
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IsAccessorDescriptor: IsAccessorDescriptor
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}, Desc)) {
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throw new $TypeError('Assertion failed: Desc must be a Property Descriptor');
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}
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if (!('[[Value]]' in Desc)) {
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return OrdinaryDefineOwnProperty(A, 'length', Desc);
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}
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var newLenDesc = assign({}, Desc);
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var newLen = ToUint32(Desc['[[Value]]']);
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var numberLen = ToNumber(Desc['[[Value]]']);
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if (newLen !== numberLen) {
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throw new $RangeError('Invalid array length');
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}
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newLenDesc['[[Value]]'] = newLen;
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var oldLenDesc = OrdinaryGetOwnProperty(A, 'length');
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if (!IsDataDescriptor(oldLenDesc)) {
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throw new $TypeError('Assertion failed: an array had a non-data descriptor on `length`');
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}
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var oldLen = oldLenDesc['[[Value]]'];
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if (newLen >= oldLen) {
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return OrdinaryDefineOwnProperty(A, 'length', newLenDesc);
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}
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if (!oldLenDesc['[[Writable]]']) {
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return false;
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}
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var newWritable;
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if (!('[[Writable]]' in newLenDesc) || newLenDesc['[[Writable]]']) {
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newWritable = true;
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} else {
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newWritable = false;
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newLenDesc['[[Writable]]'] = true;
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}
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var succeeded = OrdinaryDefineOwnProperty(A, 'length', newLenDesc);
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if (!succeeded) {
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return false;
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}
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while (newLen < oldLen) {
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oldLen -= 1;
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// eslint-disable-next-line no-param-reassign
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var deleteSucceeded = delete A[ToString(oldLen)];
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if (!deleteSucceeded) {
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newLenDesc['[[Value]]'] = oldLen + 1;
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if (!newWritable) {
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newLenDesc['[[Writable]]'] = false;
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OrdinaryDefineOwnProperty(A, 'length', newLenDesc);
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return false;
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}
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}
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}
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if (!newWritable) {
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return OrdinaryDefineOwnProperty(A, 'length', { '[[Writable]]': false });
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}
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return true;
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};
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