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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: If a named group was not reached, it is replaced by the empty string
esid: sec-getsubstitution
features: [regexp-named-groups]
info: |
Runtime Semantics: GetSubstitution( matched, str, position, captures, namedCaptures, replacement )
Table: Replacement Text Symbol Substitutions
Unicode Characters: $<
Replacement text:
2. Otherwise,
c. Let capture be ? Get(namedCaptures, groupName).
d. If capture is undefined, replace the text through > with the empty string.
---*/
let source = "(?<fst>.)(?<snd>.)|(?<thd>x)";
for (let flags of ["g", "gu"]) {
let re = new RegExp(source, flags);
assert.sameValue("", "abcd".replace(re, "$<thd>"));
}
for (let flags of ["", "u"]) {
let re = new RegExp(source, flags);
assert.sameValue("cd", "abcd".replace(re, "$<thd>"));
}
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