tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

private-field-rhs-non-object.js (1361B)

      1 // Copyright 2021 the V8 project authors.  All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: Algorithm interrupted by non-object right-hand side
      6 info: |
      7  Syntax
      8    RelationalExpression[In, Yield, Await]:
      9    [...]
     10    [+In]PrivateIdentifier in ShiftExpression[?Yield, ?Await]
     11 
     12  [...]
     13 
     14  1. Let privateIdentifier be the StringValue of PrivateIdentifier.
     15  2. Let rref be the result of evaluating ShiftExpression.
     16  3. Let rval be ? GetValue(rref).
     17  4. If Type(rval) is not Object, throw a TypeError exception.
     18 esid: sec-relational-operators-runtime-semantics-evaluation
     19 features: [class-fields-private, class-fields-private-in]
     20 ---*/
     21 
     22 let caught = null;
     23 
     24 class C {
     25  #field;
     26 
     27  constructor() {
     28    try {
     29      /**
     30       * Using a ShiftExpression to produce the non-object value verifies that
     31       * the implementation uses the operator precedence implied by the
     32       * syntactic grammar. In other words, the following statement should be
     33       * interpreted as:
     34       *
     35       *     #field in ({} << 0);
     36       *
     37       * ...rather than:
     38       *
     39       *     (#field in {}) << 0;
     40       */
     41      #field in {} << 0;
     42    } catch (error) {
     43      caught = error;
     44    }
     45  }
     46 }
     47 
     48 new C();
     49 
     50 assert.notSameValue(caught, null);
     51 assert.sameValue(caught.constructor, TypeError);
     52 
     53 reportCompare(0, 0);