On Mon, Jun 13, 2005 at 09:21:00AM -0700, Brent 'Dax' Royal-Gordon wrote: > On 6/13/05, Chip Salzenberg <[EMAIL PROTECTED]> wrote: > > Oh no ... it's even worse than you think. Almost *any* opcode that > > operates on a PMC can trigger a continuation. And I only need two > > words to prove it: > > > > "Tied variables." > > Isn't this *exactly* why Perl 6 is requiring you to mark tied > variables when they're declared?
Well, that doesn't help you in and of itself, unless every reference that could point to a tied variable was also marked. And I don't see it happening. That said, I was just informed on IRC that it's already established that once you descend into a PMC vtable entry or anything else in Parrot that's written in C (or could be), you're not allowed to jump sideways with a full continuation, but only upward in the style of an escape continuation (e.g. throwing an exception). So consider me unpanicked. About PMCs vs. register allocation, anyway. I'm still a bit on edge about this "Perl 6" thingy. -- Chip Salzenberg <[EMAIL PROTECTED]>
