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// Copyright 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Named groups may be accessed in their replacement string by number
esid: sec-getsubstitution
features: [regexp-named-groups]
info: |
Runtime Semantics: GetSubstitution( matched, str, position, captures, namedCaptures, replacement )
Table: Replacement Text Symbol Substitutions
Unicode Characters: $n
Replacement text:
The nth element of captures, where n is a single digit in the range 1 to 9. If
n≤m and the nth element of captures is undefined, use the empty String instead.
If n>m, the result is implementation-defined.
---*/
let source = "(?<fst>.)(?<snd>.)|(?<thd>x)";
for (let flags of ["g", "gu"]) {
let re = new RegExp(source, flags);
assert.sameValue("badc", "abcd".replace(re, "$2$1"));
}
for (let flags of ["", "u"]) {
let re = new RegExp(source, flags);
assert.sameValue("bacd", "abcd".replace(re, "$2$1"));
}
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