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regex
An implementation of regular expressions for Rust. This implementation uses finite automata and guarantees linear time matching on all inputs.
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fancy-regex
Rust library for regular expressions using "fancy" features like look-around and backreferences
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WorkOS
The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
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pyWhat
🐸 Identify anything. pyWhat easily lets you identify emails, IP addresses, and more. Feed it a .pcap file or some text and it'll tell you what it is! 🧙♀️
I haven't looked at its implementation, but it's probably less of a "can't" and more of a "doesn't." There just isn't a &[u8] API for fancy-regex. It only has &str APIs. The regex crate itself didn't have &[u8] APIs until 2016.
Ok, they have an issue https://github.com/fancy-regex/fancy-regex/issues/84
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.