tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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S11.4.4_A6_T3.js (584B)

      1 // Copyright (C) 2015 André Bargull. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 info: Operator ++x evaluates its reference expression once.
      6 description: >
      7    The operand expression is evaluated exactly once. Operand expression is
      8    MemberExpression: base[prop]. ToPropertyKey(prop) is not called multiple
      9    times.
     10 ---*/
     11 
     12 var propKeyEvaluated = false;
     13 var base = {};
     14 var prop = {
     15  toString: function() {
     16    assert(!propKeyEvaluated);
     17    propKeyEvaluated = true;
     18    return 1;
     19  }
     20 };
     21 
     22 ++base[prop];
     23 
     24 reportCompare(0, 0);