Yeah.. that got me thinking too. I would not have called it "new". As of version 5.10, Perl regex engine implements a complete recursive-descent parsing. Allow

Yeah.. that got me thinking too. I would not have called it "new". As of version 5.10, Perl regex engine implements a complete recursive-descent parsing. Allowing things like Regexp::Grammars[0] to exist. Perl also has a nice PEG parser framework called Pegex[1] -- [0] - https://metacpan.org/pod/Regexp::Grammars https://metacpan.org/pod/Regexp::Grammars [1] - https://metacpan.org/pod/Pegex https://metacpan.org/pod/Pegex