functional-replace-non-global.js

Enable keyboard shortcuts

// Copyright 2017 the V8 project authors. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

description: >

  Function argument to String.prototype.replace gets groups as the last argument

esid: sec-regexp.prototype-@@replace

features: [regexp-named-groups]

info: |

  RegExp.prototype [ @@replace ] ( string, replaceValue )

    14. Repeat, for each result in results,

      j. Let namedCaptures be ? Get(result, "groups").

      k. If functionalReplace is true, then

        iv. If namedCaptures is not undefined,

          1. Append namedCaptures as the last element of replacerArgs.

---*/

let source = "(?<fst>.)(?<snd>.)";

let alternateSource = "(?<fst>.)|(?<snd>.)";

for (let flags of ["", "u"]) {

  let i = 0;

  let re = new RegExp(source, flags);

  let result = "abcd".replace(re,

      (match, fst, snd, offset, str, groups) => {

    assert.sameValue(i++, 0);

    assert.sameValue("ab", match);

    assert.sameValue("a", groups.fst);

    assert.sameValue("b", groups.snd);

    assert.sameValue("a", fst);

    assert.sameValue("b", snd);

    assert.sameValue(0, offset);

    assert.sameValue("abcd", str);

    return `${groups.snd}${groups.fst}`;

});

  assert.sameValue("bacd", result);

  assert.sameValue(i, 1);

  let re2 = new RegExp(alternateSource, flags);

  assert.sameValue("undefinedbcd",

      "abcd".replace(re2,

            (match, fst, snd, offset, str, groups) => groups.snd));

reportCompare(0, 0);