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