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// |reftest| shell-option(--enable-regexp-duplicate-named-groups) skip-if(!xulRuntime.shell) -- requires shell-options
// 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);