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23 lines
917 B
23 lines
917 B
'use strict'; |
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var $ = require('../internals/export'); |
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var DESCRIPTORS = require('../internals/descriptors'); |
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var FORCED = require('../internals/object-prototype-accessors-forced'); |
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var toObject = require('../internals/to-object'); |
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var toPrimitive = require('../internals/to-primitive'); |
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var getPrototypeOf = require('../internals/object-get-prototype-of'); |
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var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f; |
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// `Object.prototype.__lookupGetter__` method |
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// https://tc39.github.io/ecma262/#sec-object.prototype.__lookupGetter__ |
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if (DESCRIPTORS) { |
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$({ target: 'Object', proto: true, forced: FORCED }, { |
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__lookupGetter__: function __lookupGetter__(P) { |
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var O = toObject(this); |
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var key = toPrimitive(P, true); |
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var desc; |
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do { |
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if (desc = getOwnPropertyDescriptor(O, key)) return desc.get; |
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} while (O = getPrototypeOf(O)); |
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} |
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}); |
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}
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