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// |reftest| async
// This file was procedurally generated from the following sources:
// - src/function-forms/dflt-params-ref-self.case
// - src/function-forms/error/async-arrow-function.template
/*---
description: Referencing a parameter from within its own initializer (async arrow function expression)
esid: sec-async-arrow-function-definitions
features: [default-parameters, async-functions]
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
1. Let status be the result of performing IteratorBindingInitialization for
FormalsList using iteratorRecord and environment as the arguments.
2. ReturnIfAbrupt(status).
3. Return the result of performing IteratorBindingInitialization for
FormalParameter using iteratorRecord and environment as the arguments.
---*/
var x = 0;
var callCount = 0;
var f;
f = async (x = x) => {
callCount = callCount + 1;
};
f()
.then(_ => {
throw new Test262Error('function should not be resolved');
}, error => assert.sameValue(error.constructor, ReferenceError))
.then(() => {
assert.sameValue(callCount, 0, 'function body is not evaluated');
}, $DONE)
.then($DONE, $DONE);