tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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computed-property-name-yield-expression.js (858B)

      1 // Copyright (C) 2020 Rick Waldron. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: >
      6    When the `yield` keyword occurs within the PropertyName of a
      7    non-generator MethodDefinition within a generator function, it behaves as a
      8    YieldExpression.
      9 info: |
     10  ComputedPropertyName:
     11    [ AssignmentExpression ]
     12 
     13  AssignmentExpression[In, Yield, Await]:
     14    [+Yield]YieldExpression[?In, ?Await]
     15 
     16 features: [computed-property-names, generators]
     17 flags: [noStrict]
     18 ---*/
     19 
     20 function * g() {
     21  let o = {
     22    [yield 10]: 1,
     23    a: 'a'
     24  };
     25 
     26  yield 20;
     27  return o;
     28 }
     29 
     30 let iter = g();
     31 assert.sameValue(iter.next().value, 10);
     32 assert.sameValue(iter.next().value, 20);
     33 
     34 let outcome = iter.next().value;
     35 
     36 assert.sameValue(outcome[undefined], 1);
     37 assert.sameValue(outcome.a, 'a');
     38 
     39 
     40 reportCompare(0, 0);