> And it has to be a language feature in Perl 6 as there you don't have open classes as in Ruby or an equivalent feature for overriding operators or adding func

> And it has to be a language feature in Perl 6 as there you don't have open classes as in Ruby or an equivalent feature for overriding operators or adding functionality to standard lib types. I'm not sure what makes you think this. I'm not very familiar with Ruby's internals but Perl 6's MOP certainly supports modifying classes, you can add your own operators etc. Could you provide a more explicit example?