Based on list of Regular Expression Engines from https://en.wikipedia.org/wiki/Comparison_of_regular-expression_engines.
NOTE: Some implementations may have missing or incomplete information. If you have more information about a particular engine, please file a pull request.
| Engine | Language | Flags | Note |
|---|---|---|---|
| Boost.Regex | C++ | imsx |
|
| DEELX | C++ | imsg |
|
| Glib/GRegex | C++ | imsx |
|
| GRETA | C++ | Could not find documentation. | |
| Gregex | RTL, HLS | Could not find documentation. | |
| RXP | RTL | Could not find documentation. | |
| Hyperscan | C++ | imsx |
Based on PCRE. |
| ICU | C, C++ | imsxw |
|
| Jakarta/Regexp | Java | Deprecated project. Could not find documentation. | |
| java.util.regex | Java | imsxduU |
d flag is UNIX lines mode (only use \n for ., ^, and $). |
| Jregex | Java | imsxuX |
|
| MATLAB | MATLAB | imsx |
|
| Oniguruma | C | imxWDSPy |
D makes \d match only ASCII digits. |
| Onigmo (Oniguruma-mod) | C, Ruby | imxdau |
Fork of Oniguruma. d is Default compatiblity mode for Ruby 1.9.3. |
| PCRE | C, C++ | imnsxx |
|
| Qt/QRegExp | C++ | No character-based flags that I could find. | |
| RE2 | C++ | imsU |
|
| RGX | C++ | Could not find documentation. | |
| SubReg | C | iI |
|
| TPerlRegEx | Object Pascal | imnsxx |
Wrapper for PCRE. |
| TRE | C | inrU |
|
| TRegExpr | Object Pascal | imsgxr |
|
| XRegExp | ECMAScript | imguynsxA |
|
| APL | APL | imsx |
Based on PCRE. |
| C++ 11 | C++ | ||
| D | D | imsxg |
|
| Go | Go | imsU |
Based on RE2. |
| Haskell | Haskell | imnsxx |
Multiple implementations including PCRE. |
| ECMAScript | ECMAScript | imsugy |
|
| Julia | Julia | imsxa |
|
| Lua | Lua | No character-based flags that I could find. | |
| Mathmatica | Mathmatica | No character-based flags that I could find. | |
| .NET | .NET | imsxn |
|
| Nim | Nim | imnsxx |
Uses PCRE. |
| Ocaml | Ocaml | No character-based flags that I could find. | |
| Perl | Perl | imsxxpaadlun |
d enables legacy problematic behavior. |
| PHP | PHP | imnsxx |
Uses PCRE. |
| POSIX C | POSIX C | ||
| Python/re | Python | iLmsux |
|
| Python/regex | Python | iLmsuxV0V1 |
|
| Rust | Rust | imsUux |
|
| SAP ABAP | SAP ABAP | No character-based flags that I could find. | |
| Tcl | Tcl | imsxnbcepqtw |
|
| Wolfram | Wolfram | No character-based flags that I could find. | |
| XML Schema | XML Schema | No character-based flags that I could find. | |
| XPath 3/XQuery | XPath 3/XQuery | imsxq |