fancy-regex VS pyWhat

https://github.com/fancy-regex/fancy-regex/issues/84 it's still open issue

Ahh, very interesting, thanks for sharing! Do you have any thoughts around why that is? I presume that's due to Oniguruma supporting a much broader feature set and something like fancy-regexp's approach with mixing a backtracking VM and NFA implementation for simple queries would be needed for better perf? (I am aware you played a role in that) [1]

I have been playing around with regex parsing through building parsers through parser combinators at runtime recently, no clue how it will perform in practice yet (structuring parser generators at runtime is challenging in general in low-level languages) but maybe that could pan out and lead to an interesting way to support broader sets of regex syntaxes like POSIX in a relatively straightforward and performant way.

[1] https://github.com/fancy-regex/fancy-regex#theory

Not an expert but fancy regex is a Rust library that uses a hybrid approach to detect whether a sub expression contains backtracking and delegates to the appropriate engine.

https://github.com/fancy-regex/fancy-regex

Is there a library written in Go similar to PyWhat? I want to use a subset of the functionality for a simple go program I'm writing. I could just call PyWhat, link to lemmeknow, or even write a simple go implementation myself, but I wanted to ask if there was a pure go implementation. Thanks!

Lemmeknow is basically used for identifying text as mentioned in README and video. It is Rust implementation of PyWhat. You can see various usecases there too.

For rarity, we have got the database from pyWhat and the wiki says:

This project was inspired by u/beesec 's pyWhat

Do you mean something like this: https://github.com/bee-san/pyWhat

pyWhat enables you to easily identify emails, IP addresses and more. Feed it a .pcap file or some mysterious text or hex of a file, and it will tell you what it is. The tool is recursive, so it can identify everything in text, files and more. A shout out to the tool's author for sharing his creation.