Perl has powerful regular expressions, but it only goes so far. Doing multiline/nested structured parsing is too painful. Perl6/Raku has built in grammers that

Perl has powerful regular expressions, but it only goes so far. Doing multiline/nested structured parsing is too painful. Perl6/Raku has built in grammers that can do that idiomatically. If you have a couple minutes, give this a glance. It will give you an idea. https://andrewshitov.com/2018/10/31/a-simple-parser-in-perl-6-grammars/ https://andrewshitov.com/2018/10/31/a-simple-parser-in-perl-... I am no expert in haskell either. But parsec is similar in concept.