tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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call-proto-not-ctor.js (1176B)

      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 esid: sec-super-keyword
      5 description: SuperCall should evaluate Arguments prior to checking IsConstructor
      6 info: |
      7  SuperCall : `super` Arguments
      8 
      9  [...]
     10  3. Let _func_ be ! GetSuperConstructor().
     11  4. Let _argList_ be ? ArgumentListEvaluation of |Arguments|.
     12  5. If IsConstructor(_func_) is *false*, throw a *TypeError* exception.
     13  [...]
     14 features: [class]
     15 ---*/
     16 
     17 var evaluatedArg = false;
     18 var caught;
     19 class C extends Object {
     20  constructor() {
     21    try {
     22      super(evaluatedArg = true);
     23    } catch (err) {
     24      caught = err;
     25    }
     26  }
     27 }
     28 
     29 Object.setPrototypeOf(C, parseInt);
     30 
     31 // When the "construct" invocation completes and the "this" value is
     32 // uninitialized, the specification dictates that a ReferenceError must be
     33 // thrown. That behavior is tested elsewhere, so the error is ignored (if it is
     34 // produced at all).
     35 try {
     36  new C();
     37 } catch (_) {}
     38 
     39 assert.sameValue(typeof caught, 'object');
     40 assert.sameValue(caught.constructor, TypeError);
     41 assert(evaluatedArg, 'performs ArgumentsListEvaluation');
     42 
     43 reportCompare(0, 0);