tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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string-replace-numbered.js (1032B)

      1 // Copyright 2017 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: Named groups may be accessed in their replacement string by number
      6 esid: sec-getsubstitution
      7 features: [regexp-named-groups]
      8 info: |
      9  Runtime Semantics: GetSubstitution( matched, str, position, captures, namedCaptures, replacement )
     10 
     11  Table: Replacement Text Symbol Substitutions
     12 
     13  Unicode Characters: $n
     14  Replacement text:
     15    The nth element of captures, where n is a single digit in the range 1 to 9. If
     16    n≤m and the nth element of captures is undefined, use the empty String instead.
     17    If n>m, the result is implementation-defined.
     18 ---*/
     19 
     20 let source = "(?<fst>.)(?<snd>.)|(?<thd>x)";
     21 for (let flags of ["g", "gu"]) {
     22  let re = new RegExp(source, flags);
     23  assert.sameValue("badc", "abcd".replace(re, "$2$1"));
     24 }
     25 for (let flags of ["", "u"]) {
     26  let re = new RegExp(source, flags);
     27  assert.sameValue("bacd", "abcd".replace(re, "$2$1"));
     28 }
     29 
     30 
     31 reportCompare(0, 0);