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// |reftest| error:SyntaxError
// This file was procedurally generated from the following sources:
// - src/function-forms/dflt-params-duplicates.case
// - src/function-forms/syntax/async-arrow-function.template
/*---
description: It is a Syntax Error if BoundNames of FormalParameters contains any duplicate elements. (async arrow function expression)
esid: sec-async-arrow-function-definitions
features: [default-parameters]
flags: [generated]
negative:
phase: parse
type: SyntaxError
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
14.1.2 Static Semantics: Early Errors
StrictFormalParameters : FormalParameters
- It is a Syntax Error if BoundNames of FormalParameters contains any
duplicate elements.
FormalParameters : FormalParameterList
- It is a Syntax Error if IsSimpleParameterList of FormalParameterList is
false and BoundNames of FormalParameterList contains any duplicate
elements.
---*/
$DONOTEVALUATE();
(async (x = 0, x) => {
});