Thanks for the pointer. I haven't been following Perl 6 at all, so some of the new syntax I'm seeing in Synopsis 4 is still a bit unclear, but I'm pretty sure I've at least got the formal parameters bit worked out. Personally, I think it looks less obvious/consistent than the existing Perl 5 equivalent (use my to create lexicals in some situations, use -> or ^ in others) for the small benefit of eliminating implicit scopes, but I can easily see how others would disagree, given the number of complaints I've seen about subs always starting with a bunch of mys and shifts.