Perl 6 contains a bunch of really powerful tools, like the ability to create operators from any (non-whitespace) Unicode string, wrap subs and methods, or rewir

Perl 6 contains a bunch of really powerful tools, like the ability to create operators from any (non-whitespace) Unicode string, wrap subs and methods, or rewire the language's grammar on the fly. Unsurprisingly, this sort of power can cause a lot of trouble if used with ill-intent. It also can make for wonderfully expressive, clean programs.