tor-browser

The Tor Browser
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syntax-await-in-ConditionalExpression.js (2477B)

      1 // |reftest| async
      2 // Copyright (C) 2024 Richard Gibson. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 esid: prod-ConditionalExpression
      6 description: >
      7    await binds more tightly than conditional operators
      8 info: |
      9    ConditionalExpression[In, Yield, Await] :
     10      ShortCircuitExpression[?In, ?Yield, ?Await]
     11      ShortCircuitExpression[?In, ?Yield, ?Await] `?` AssignmentExpression[+In, ?Yield, ?Await] `:` AssignmentExpression[?In, ?Yield, ?Await]
     12    
     13    ShortCircuitExpression[In, Yield, Await] :
     14      LogicalORExpression[?In, ?Yield, ?Await]
     15      CoalesceExpression[?In, ?Yield, ?Await]
     16    
     17    LogicalORExpression[In, Yield, Await] :
     18      LogicalANDExpression[?In, ?Yield, ?Await]
     19      LogicalORExpression[?In, ?Yield, ?Await] `||` LogicalANDExpression[?In, ?Yield, ?Await]
     20    
     21    LogicalANDExpression[In, Yield, Await] :
     22      BitwiseORExpression[?In, ?Yield, ?Await]
     23      LogicalANDExpression[?In, ?Yield, ?Await] `&&` BitwiseORExpression[?In, ?Yield, ?Await]
     24    
     25    BitwiseORExpression[In, Yield, Await] :
     26      BitwiseXORExpression[?In, ?Yield, ?Await]
     27    
     28    BitwiseXORExpression[In, Yield, Await] :
     29      BitwiseANDExpression[?In, ?Yield, ?Await]
     30    
     31    BitwiseANDExpression[In, Yield, Await] :
     32      EqualityExpression[?In, ?Yield, ?Await]
     33    
     34    EqualityExpression[In, Yield, Await] :
     35      RelationalExpression[?In, ?Yield, ?Await]
     36    
     37    RelationalExpression[In, Yield, Await] :
     38      ShiftExpression[?Yield, ?Await]
     39    
     40    ShiftExpression[Yield, Await] :
     41      AdditiveExpression[?Yield, ?Await]
     42    
     43    AdditiveExpression[Yield, Await] :
     44      MultiplicativeExpression[?Yield, ?Await]
     45    
     46    MultiplicativeExpression[Yield, Await] :
     47      ExponentiationExpression[?Yield, ?Await]
     48    
     49    ExponentiationExpression[Yield, Await] :
     50      UnaryExpression[?Yield, ?Await]
     51    
     52    UnaryExpression[Yield, Await] :
     53      UpdateExpression[?Yield, ?Await]
     54      [+Await] AwaitExpression[?Yield]
     55    
     56    AwaitExpression[Yield] :
     57      `await` UnaryExpression[?Yield, +Await]
     58 flags: [async]
     59 includes: [asyncHelpers.js]
     60 ---*/
     61 
     62 async function foo() {
     63  let x = 'initial value';
     64  let shouldNotBeAwaited = {
     65    then: function(onFulfilled) {
     66      x = 'unexpected then() call';
     67      Promise.resolve().then(onFulfilled);
     68    }
     69  };
     70  // This must parse like `(await false) || shouldNotBeAwaited`.
     71  await false || shouldNotBeAwaited;
     72  assert.sameValue(x, 'initial value');
     73 }
     74 asyncTest(foo);