Careful with Perl-style regexpes (aptly renamed to "Patterns" in Perl 6 AFAICT) being proper. They have higher complexity than standard regexpes [1], and have b

Careful with Perl-style regexpes (aptly renamed to "Patterns" in Perl 6 AFAICT) being proper. They have higher complexity than standard regexpes [1], and have been conjectured to recognize (a larger fragment of) context-free languages [2] rather than just regular languages. [1]: https://swtch.com/~rsc/regexp/regexp1.html https://swtch.com/~rsc/regexp/regexp1.html [2]: https://www.perlmonks.org/?node_id=406253 https://www.perlmonks.org/?node_id=406253