ripgrep author here. Yes, the Teddy algorithm was originally extracted from Hyperscan. But this is a teeny tiny piece of Hyperscan. And AFAIK, ripgrep's impleme

ripgrep author here. Yes, the Teddy algorithm was originally extracted from Hyperscan. But this is a teeny tiny piece of Hyperscan. And AFAIK, ripgrep's implementation (which is actually in the underlying regex library) doesn't carry over the full Teddy algorithm. Or so I've been told. :-)