js/src/tests/test262/built-ins/RegExp/duplicate-named-capturing-groups-syntax.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

// |reftest| skip -- regexp-duplicate-named-groups is not supported
// Copyright 2022 Igalia, S.L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-regexp-pattern-flags
description: Runtime parsing of syntax for duplicate named capturing groups
features: [regexp-duplicate-named-groups]
---*/

assert.throws(
  SyntaxError,
  () => new RegExp("(?<x>a)(?<x>b)"),
  "Duplicate named capturing groups in the same alternative do not parse"
);

let source = "(?<x>a)|(?<x>b)";
let parsed = new RegExp(source);
assert.sameValue(parsed.source, source, "Duplicate named capturing groups in separate alternatives parse correctly");

reportCompare(0, 0);