Last change
on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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[6a3a178] | 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var DESCRIPTORS = require('../internals/descriptors');
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| 4 | var FORCED = require('../internals/object-prototype-accessors-forced');
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| 5 | var toObject = require('../internals/to-object');
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| 6 | var toPropertyKey = require('../internals/to-property-key');
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| 7 | var getPrototypeOf = require('../internals/object-get-prototype-of');
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| 8 | var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
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| 9 |
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| 10 | // `Object.prototype.__lookupGetter__` method
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| 11 | // https://tc39.es/ecma262/#sec-object.prototype.__lookupGetter__
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| 12 | if (DESCRIPTORS) {
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| 13 | $({ target: 'Object', proto: true, forced: FORCED }, {
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| 14 | __lookupGetter__: function __lookupGetter__(P) {
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| 15 | var O = toObject(this);
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| 16 | var key = toPropertyKey(P);
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| 17 | var desc;
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| 18 | do {
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| 19 | if (desc = getOwnPropertyDescriptor(O, key)) return desc.get;
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| 20 | } while (O = getPrototypeOf(O));
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| 21 | }
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| 22 | });
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| 23 | }
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