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26 lines
862 B
JavaScript
26 lines
862 B
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-object-initializer
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description: Permitted duplicate `__proto__` property (shorthand)
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info: |
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Annex B defines an early error for duplicate PropertyName of `__proto__`,
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but this does not apply to properties created from other productions.
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B.3.1 __proto__ Property Names in Object Initializers
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It is a Syntax Error if PropertyNameList of PropertyDefinitionList contains
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any duplicate entries for "__proto__" and at least two of those entries
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were obtained from productions of the form
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PropertyDefinition : PropertyName : AssignmentExpression .
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---*/
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var __proto__ = 2;
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var obj = {
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__proto__,
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__proto__,
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};
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assert(obj.hasOwnProperty("__proto__"));
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assert.sameValue(obj.__proto__, 2);
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