Search Results for "regular expression parser"

RE2/J is a high-performance regular expression engine implemented in pure Java as a port of Google’s C++ RE2 library. Unlike traditional regex engines such as Java’s java.util.regex, PCRE, or Perl’s implementation—which rely on backtracking and can suffer from catastrophic exponential runtimes—RE2/J guarantees linear-time matching relative to input size. It achieves this efficiency by simulating all possible matches in a single pass using a nondeterministic finite automaton (NFA), ensuring predictable and safe performance even with complex patterns. ...

RegexAssistant is a Regex GUI application to help learn, create, and test Regular Expressions. It's an open source stand alone Windows application. RegexAssistant is great for beginners and intermediate-advanced regex users. -It helps beginners to learn regex by providing examples and token cheat-sheet. -Intermediate-advanced users can use RegexAssistant to test complex expressions.

A very simple tool to debug perl regular expression.

EPIC is an open source Perl IDE for the Eclipse platform. Features supported are syntax highlighting, on the fly syntax check, content assist, perldoc support, source formatter, templating support, regular expression plugin and a Perl debugger.

Grevis is a Linux graphical tool for learning and debugging the Perl regular expressions. It uses the output of the regular expression debugger (as of version 5.8.10) to obtain data needed to visualise the matching process step-by-step.

Graphically displays matches of Perl regular expressions. Useful for teaching how to write regular expression as well as developing/testing your own.