commit | 17f13863b64b25eccf565e0aa9c4c441f0562b84 | [log] [tgz] |
---|---|---|
author | jgruber <jgruber@chromium.org> | Tue Mar 28 08:02:03 2017 |
committer | Commit bot <commit-bot@chromium.org> | Tue Mar 28 08:02:03 2017 |
tree | 1f0252beb1568aaa2f5c47df72ad4614ff007f91 | |
parent | 54a1942a8471a060971997b52051cd0e1a1cd404 [diff] |
[regexp] Named capture support for string replacements This implements support for named captures in RegExp.prototype[@@replace] for when the replaceValue is not callable. Named captures can be referenced from replacement strings by using the "$<name>" syntax. A couple of examples: let re = /(?<fst>.)(?<snd>.)/u; "abcd".replace(re, "$<snd>$<fst>") // "bacd" "abcd".replace(re, "$2$1") // "bacd" (numbered refs work as always) "abcd".replace(re, "$<snd") // SyntaxError (unterminated named ref) "abcd".replace(re, "$<42$1>") // "cd" (invalid name) "abcd".replace(re, "$<thd>") // "cd" (non-existent name) "abcd".replace(/(?<fst>.)|(?<snd>.)/u, "$<snd>") // "cd" (non-matched capture) Support is currently behind the --harmony-regexp-named-captures flag. BUG=v8:5437 Review-Url: https://codereview.chromium.org/2775303002 Cr-Commit-Position: refs/heads/master@{#44171}
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
V8 can run standalone, or can be embedded into any C++ application.
V8 Project page: https://github.com/v8/v8/wiki
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