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// |reftest| error:SyntaxError
// Copyright 2019 Google, Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-OptionalExpression
description: >
optional chaining is forbidden in write contexts
info: |
UpdateExpression[Yield, Await]:
LeftHandSideExpression++
LeftHandSideExpression--
++UnaryExpression
--UnaryExpression
features: [optional-chaining]
negative:
phase: parse
type: SyntaxError
---*/
$DONOTEVALUATE();
// LeftHandSideExpression ++
const a = {};
a?.b++;