That's only for regular languages. Backreferences aren't regular. | Hacker News

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		wahern on Sept 17, 2019 \| parent \| context \| favorite \| on: MSVC's implementation of the C++ Standard Library That's only for regular languages. Backreferences aren't regular.

ridiculous_fish on Sept 17, 2019 | [–]

Yes, hence my question about using NFAs for std::regex!

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