tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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super-must-be-called.js (903B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 es6id: 23.3.1
      5 description: Super need to be called to initialize internals
      6 info: |
      7  23.3.1 The WeakMap Constructor
      8 
      9  ...
     10 
     11  The WeakMap constructor is designed to be subclassable. It may be used as the
     12  value in an extends clause of a class definition. Subclass constructors that
     13  intend to inherit the specified WeakMap behaviour must include a super call to
     14  the WeakMap constructor to create and initialize the subclass instance with
     15  the internal state necessary to support the WeakMap.prototype built-in
     16  methods.
     17 features: [WeakMap]
     18 ---*/
     19 
     20 class M1 extends WeakMap {
     21  constructor() {}
     22 }
     23 
     24 assert.throws(ReferenceError, function() {
     25  new M1();
     26 });
     27 
     28 class M2 extends WeakMap {
     29  constructor() {
     30    super();
     31  }
     32 }
     33 
     34 new M2();
     35 
     36 reportCompare(0, 0);