I don't know about the continuation stuff, but you can't assume that running imc --> pasm --> exec does the same thing as imc --> exec. I ran into that before, and I don't think its going to get fixed until the new imcc lands, at which point old-school pasm might even be gone (although I don't know that I'm remembering that part right).
Regards, -- Gregor On Sun, 2004-03-21 at 08:53, Piers Cawley wrote: > So, I'm trying to get my head 'round parrot's continuations. It's my > understanding that, at creation time, a Continuation closes over the > current user stacks, control stack and lexical pad (and possibly some > other stuff but those'll do for now). > > So, it seems to me that the following code should print "Howdy, > world". > > .sub main > $P0 = new PerlUndef > $P0 = "Howdy, world\n" > save $P0 > $P1 = newcont after > # $P1 = new .Continuation > # set_addr $P1, after > invoker($P1) > sub_end: > .pcc_begin_return > .pcc_end_return > > after: > restore $P2 > print $P2 > branch sub_end > .end > > .sub invoker > .param pmc a_cont > invoke a_cont > .pcc_begin_return > .pcc_end_return > .end > > Except, what actually happens is: > > Parrot VM: PANIC: Illegal rethrow! > C file src/exceptions.c, line 356 > Parrot file (unknown file), line 0 > > Which isn't quite what I had in mind. Bizarrely, if I do: > > $ parrot -o howdy.pasm howdy.imc > $ parrot howdy.pasm > Howdy, world > $ > > everything's fine. > > Weird hunh? -- Gregor Purdy [EMAIL PROTECTED] Focus Research, Inc. http://www.focusresearch.com/
