tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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privatefieldset-evaluation-order-3.js (1000B)

      1 // Copyright (C) 2021 André Bargull. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: >
      6  Evaluation order when resolving private fields.
      7 esid: sec-runtime-semantics-keyeddestructuringassignmentevaluation
      8 info: |
      9  13.15.5.6 Runtime Semantics: KeyedDestructuringAssignmentEvaluation
     10    1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
     11      a. Let lref be the result of evaluating DestructuringAssignmentTarget.
     12      b. ReturnIfAbrupt(lref).
     13  2. Let v be ? GetV(value, propertyName).
     14  3. ...
     15 
     16 features: [class, class-fields-private]
     17 ---*/
     18 
     19 class Base {
     20  constructor(o) {
     21    return o;
     22  }
     23 }
     24 
     25 class C extends Base {
     26  #field;
     27 
     28  m() {
     29    var init = () => new C(this);
     30 
     31    var object = {
     32      get a() {
     33        init();
     34 
     35        return "pass";
     36      }
     37    };
     38 
     39    ({a: this.#field} = object);
     40 
     41    assert.sameValue(this.#field, "pass");
     42  }
     43 }
     44 
     45 C.prototype.m.call({});
     46 
     47 reportCompare(0, 0);