RegExpress 3.21

• New experimental engines:
  • TRegEx 29.0 from Visual Component Library (VCL), used in C++Builder and Delphi.
  • QRegularExpression class from Qt 6.9.3 (in C++).
  • SRELL 4.100 — a variation of std::wregex with additional features (in C++).
  • compile-time-regular-expressions (CTRE)¹ 3.10.0 (in C++).
• The Feature Matrix (RegexFeatureMatrix.xlsx) has been updated accordingly.

__________

1. The CTRE engine is available under certain conditions only. ↩

RegExpress 3.20

• New experimental engine: GNAT.Regpat in Ada (using GCC 15.2.0, MSYS2).
• New indicators added to Feature Matrix (RegexFeatureMatrix.xlsx):
  • “Unicode” — whether engine supports Unicode characters, not just ASCII.
  • “No hang” — whether engine seems protected against catastrophic backtracking, causing cvasi-infinite execution or timeouts.
• New option added to std::wregex and PCRE2 engines: locale.

RegExpress 3.19

• New experimental engine: C++ std::wregex class using GCC (MSYS2, Mingw-w64),
• The Feature Matrix includes a new characteristics: “Split surrogates”, showing the engines in which “.” matches the components of surrogate pairs instead of matching the whole character.

RegExpress 3.18

New JavaScript engines for research:

• V8 13.6.233.10 (via Node.js) 13.6.233.10, used in Microsoft Edge and Google Chrome browsers,
• QuickJs 2025-04-26,
• SpiderMonkey C143.0, used in Mozilla Firefox browser,
• JavaScriptCore (via Bun 1.2.21¹), used in Safari browser from Apple.

Updated engines:

• PCRE2 10.46,
• Boost 1.89.0,
• RE2 2025-08-12,
• D 2.111,
• Python 3.13.6.

News:

• The status lines display the position of the caret, length of the text, and the Unicode value of the current character.
• The Feature Matrix includes a new characteristics: “Allow duplicate group names”.
• The solution file has a new format and the slnx extension.

__________

1. The Bun engine requires a modern 64-bit processor. ↩

RegExpress 3.17

Updated engine:

• RE2 2025-08-05.

RegExpress 3.16

Updated engines:

• Java 24.0.1
• Fancy-regex (in Rust) 0.16.1

A tool has been added to generate the comparison table (“Feature Matrix”) of regex engines. The table (Excel and HTML) can be found on home page of this project.

RegExpress 3.15

• New engine: RE2/J 1.8 — a port of C++ library RE2 to pure Java (https://github.com/google/re2j). Added as a package of Java engine.
• Updated engine: Boost.Regex 1.88.0.

RegExpress 3.14

• New experimental engine: tiny-regex-c (https://github.com/rurban/tiny-regex-c).
• Show engine title in tab header.

RegExpress 3.12

Updated engines:

• ICU 77.1
• Forgex v4.6.

RegExpress 3.11

• Updated engine: Forgex v4.5.