Is export written in perl? I would have thought that export was written in the c code that makes up perl! But if export is written in perl, I can definitely see the use of %::.
Yes it's in Perl! See perldoc -m Exporter, but don't stare at it too hard before you're ready to understand and respect the smoke and mirrors revealed.
Thanks, it's definitely more complex then anything I've written...but it's not that bad to follow, you just need to understand typeglobs and the system table structure.