Regex parsers for ECMAScript, Python, Go, Rust, PCRE2 and Java dialects, with an error catalogue.
Part of [Rexact](https://github.com/aniket-3001/rexact), a regex equivalence and ReDoS tool that returns evidence with every verdict (a checkable certificate, a shortest counterexample, or an explicit "unknown" with the limit that was hit).
Licensed under MIT OR Apache-2.0.