mirror of https://github.com/tc39/test262.git
29 lines
949 B
JavaScript
29 lines
949 B
JavaScript
// Copyright 2017 the V8 project authors. 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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description: If a named group was not reached, it is replaced by the empty string
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esid: sec-getsubstitution
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features: [regexp-named-groups]
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info: |
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Runtime Semantics: GetSubstitution( matched, str, position, captures, namedCaptures, replacement )
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Table: Replacement Text Symbol Substitutions
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Unicode Characters: $<
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Replacement text:
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2. Otherwise,
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c. Let capture be ? Get(namedCaptures, groupName).
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d. If capture is undefined, replace the text through > with the empty string.
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---*/
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let source = "(?<fst>.)(?<snd>.)|(?<thd>x)";
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for (let flags of ["g", "gu"]) {
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let re = new RegExp(source, flags);
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assert.sameValue("", "abcd".replace(re, "$<thd>"));
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}
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for (let flags of ["", "u"]) {
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let re = new RegExp(source, flags);
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assert.sameValue("cd", "abcd".replace(re, "$<thd>"));
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}
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