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45 lines
1.2 KiB
45 lines
1.2 KiB
2 years ago
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'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var $gOPD = require('../helpers/getOwnPropertyDescriptor');
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var $TypeError = GetIntrinsic('%TypeError%');
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var callBound = require('call-bind/callBound');
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var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
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var has = require('has');
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var IsArray = require('./IsArray');
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var IsPropertyKey = require('./IsPropertyKey');
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var IsRegExp = require('./IsRegExp');
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var ToPropertyDescriptor = require('./ToPropertyDescriptor');
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var Type = require('./Type');
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// https://ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
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module.exports = function OrdinaryGetOwnProperty(O, P) {
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if (Type(O) !== 'Object') {
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throw new $TypeError('Assertion failed: O must be an Object');
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}
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if (!IsPropertyKey(P)) {
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throw new $TypeError('Assertion failed: P must be a Property Key');
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}
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if (!has(O, P)) {
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return void 0;
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}
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if (!$gOPD) {
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// ES3 / IE 8 fallback
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var arrayLength = IsArray(O) && P === 'length';
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var regexLastIndex = IsRegExp(O) && P === 'lastIndex';
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return {
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'[[Configurable]]': !(arrayLength || regexLastIndex),
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'[[Enumerable]]': $isEnumerable(O, P),
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'[[Value]]': O[P],
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'[[Writable]]': true
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};
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}
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return ToPropertyDescriptor($gOPD(O, P));
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};
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