tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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private-getter-brand-check.js (1367B)

      1 // Copyright (C) 2019 Caio Lima (Igalia SL). All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: PrivateBrandCheck fails when the object O doesn't have P.[[Brand]] (private getter)
      6 esid: sec-privatefieldget
      7 info: |
      8  PrivateFieldGet (P, O)
      9    1. Assert: P is a Private Name.
     10    2. If O is not an object, throw a TypeError exception.
     11    3. If P.[[Kind]] is "field",
     12      a. Let entry be PrivateFieldFind(P, O).
     13      b. If entry is empty, throw a TypeError exception.
     14      c. Return entry.[[PrivateFieldValue]].
     15    4. Perform ? PrivateBrandCheck(O, P).
     16    5. If P.[[Kind]] is "method",
     17      a. Return P.[[Value]].
     18    6. Else,
     19      a. Assert: P.[[Kind]] is "accessor".
     20      b. If P does not have a [[Get]] field, throw a TypeError exception.
     21      c. Let getter be P.[[Get]].
     22      d. Return ? Call(getter, O).
     23 
     24  PrivateBrandCheck(O, P)
     25    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
     26      a. Throw a TypeError exception.
     27 features: [class, class-methods-private]
     28 ---*/
     29 
     30 class C {
     31  get #m() { return 'test262'; }
     32  
     33  access(o) {
     34    return o.#m;
     35  }
     36 }
     37 
     38 let c = new C();
     39 assert.sameValue(c.access(c), 'test262');
     40 
     41 let o = {};
     42 assert.throws(TypeError, function() {
     43  c.access(o);
     44 }, 'invalid access a private method');
     45 
     46 
     47 reportCompare(0, 0);