Plan 9 from Bell Labs’s /usr/web/sources/contrib/gabidiaz/root/sys/src/cmd/perl/lib/Attribute/Handlers/demo/demo3.pl
package main; use MyClass; my MyClass $x :Good :Bad(1**1-1) :Omni(vorous); package SomeOtherClass; use base MyClass; sub tent { 'acle' } sub w :Ugly(sister) :Omni('po',tent()) {} my @y :Good :Omni(s/cie/nt/); my %y :Good(q/bye) :Omni(q/bus/);