mirror of
https://github.com/tc39/test262.git
synced 2025-11-03 21:24:30 +01:00
61 lines
1.7 KiB
JavaScript
61 lines
1.7 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/function-forms/dflt-params-arg-val-undefined.case
|
|
// - src/function-forms/default/async-arrow-function.template
|
|
/*---
|
|
description: Use of intializer when argument value is `undefined` (async arrow function expression)
|
|
esid: sec-async-arrow-function-definitions
|
|
features: [default-parameters]
|
|
flags: [generated, async]
|
|
info: |
|
|
14.7 Async Arrow Function Definitions
|
|
|
|
AsyncArrowFunction :
|
|
...
|
|
CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody
|
|
|
|
AsyncConciseBody :
|
|
{ AsyncFunctionBody }
|
|
|
|
...
|
|
|
|
Supplemental Syntax
|
|
|
|
When processing an instance of the production AsyncArrowFunction :
|
|
CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody the interpretation of
|
|
CoverCallExpressionAndAsyncArrowHead is refined using the following grammar:
|
|
|
|
AsyncArrowHead :
|
|
async ArrowFormalParameters
|
|
|
|
|
|
14.1.19 Runtime Semantics: IteratorBindingInitialization
|
|
|
|
FormalsList : FormalsList , FormalParameter
|
|
|
|
[...]
|
|
23. Let iteratorRecord be Record {[[Iterator]]:
|
|
CreateListIterator(argumentsList), [[Done]]: false}.
|
|
24. If hasDuplicates is true, then
|
|
[...]
|
|
25. Else,
|
|
a. Perform ? IteratorBindingInitialization for formals with
|
|
iteratorRecord and env as arguments.
|
|
[...]
|
|
|
|
---*/
|
|
|
|
|
|
var callCount = 0;
|
|
|
|
// Stores a reference `ref` for case evaluation
|
|
var ref = async (fromLiteral = 23, fromExpr = 45, fromHole = 99) => {
|
|
assert.sameValue(fromLiteral, 23);
|
|
assert.sameValue(fromExpr, 45);
|
|
assert.sameValue(fromHole, 99);
|
|
callCount = callCount + 1;
|
|
};
|
|
|
|
ref(undefined, void 0).then(() => {
|
|
assert.sameValue(callCount, 1, 'async arrow function invoked exactly once')
|
|
}).then($DONE, $DONE);
|