Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| async
// Copyright (C) 2024 Richard Gibson. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-ConditionalExpression
description: >
await binds more tightly than conditional operators
info: |
ConditionalExpression[In, Yield, Await] :
ShortCircuitExpression[?In, ?Yield, ?Await]
ShortCircuitExpression[?In, ?Yield, ?Await] `?` AssignmentExpression[+In, ?Yield, ?Await] `:` AssignmentExpression[?In, ?Yield, ?Await]
ShortCircuitExpression[In, Yield, Await] :
LogicalORExpression[?In, ?Yield, ?Await]
CoalesceExpression[?In, ?Yield, ?Await]
LogicalORExpression[In, Yield, Await] :
LogicalANDExpression[?In, ?Yield, ?Await]
LogicalORExpression[?In, ?Yield, ?Await] `||` LogicalANDExpression[?In, ?Yield, ?Await]
LogicalANDExpression[In, Yield, Await] :
BitwiseORExpression[?In, ?Yield, ?Await]
LogicalANDExpression[?In, ?Yield, ?Await] `&&` BitwiseORExpression[?In, ?Yield, ?Await]
BitwiseORExpression[In, Yield, Await] :
BitwiseXORExpression[?In, ?Yield, ?Await]
BitwiseXORExpression[In, Yield, Await] :
BitwiseANDExpression[?In, ?Yield, ?Await]
BitwiseANDExpression[In, Yield, Await] :
EqualityExpression[?In, ?Yield, ?Await]
EqualityExpression[In, Yield, Await] :
RelationalExpression[?In, ?Yield, ?Await]
RelationalExpression[In, Yield, Await] :
ShiftExpression[?Yield, ?Await]
ShiftExpression[Yield, Await] :
AdditiveExpression[?Yield, ?Await]
AdditiveExpression[Yield, Await] :
MultiplicativeExpression[?Yield, ?Await]
MultiplicativeExpression[Yield, Await] :
ExponentiationExpression[?Yield, ?Await]
ExponentiationExpression[Yield, Await] :
UnaryExpression[?Yield, ?Await]
UnaryExpression[Yield, Await] :
UpdateExpression[?Yield, ?Await]
[+Await] AwaitExpression[?Yield]
AwaitExpression[Yield] :
`await` UnaryExpression[?Yield, +Await]
flags: [async]
includes: [asyncHelpers.js]
---*/
async function foo() {
let x = 'initial value';
let shouldNotBeAwaited = {
then: function(onFulfilled) {
x = 'unexpected then() call';
Promise.resolve().then(onFulfilled);
}
};
// This must parse like `(await false) || shouldNotBeAwaited`.
await false || shouldNotBeAwaited;
assert.sameValue(x, 'initial value');
}
asyncTest(foo);