FWIW back references mean you're way outside of "regular languages" so e.g. DFA ... | Hacker News

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masklinn on Dec 5, 2017 | parent | context | favorite | on: Building a Regex Engine in Fewer Than 40 Lines of ...

FWIW back references mean you're way outside of "regular languages" so e.g. DFA usually don't support them.

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