Perl6 allows it, and it's the preferred convention to boot. Small Intro: https://perl6advent.wordpress.com/2015/12/05/day-5-identifiers-have-hyphens-in-them/ h

Perl6 allows it, and it's the preferred convention to boot. Small Intro: https://perl6advent.wordpress.com/2015/12/05/day-5-identifiers-have-hyphens-in-them/ https://perl6advent.wordpress.com/2015/12/05/day-5-identifie...