At 8:55 AM -0600 8/9/02, Jonathan Sillito wrote:
>On Tue, 2002-08-06 at 20:11, Sean O'Rourke wrote:
>> On Tue, 6 Aug 2002, Dan Sugalski wrote:
>>
>> > At 12:57 PM -0600 8/6/02, Jonathan Sillito wrote:
>> > >Can a prototyped sub take a variable number of parameters (ie can it
>> > >have 'rest' params?). If so, should there be some way for the caller to
>> > >specify how many params are being passed in pmc registers?
>> >
>> > A prototyped sub can take a variable number of params, and there
>> > should be a counter somewhere. I thought that was specified, but
>> > apparently not. I'll fix that.
>>
>> I'm guessing this would be:
>>
>> I1 The number of items pushed onto the stack.
>
>Though I think what is missing is the number of PMC's passed in
>registers.
Yep. I added that to PDD03. Should be in the repository now.
> > > >The pdd mentions callcc, but the callcc op seems to be going away
>> > >(replaced with invoke on a continuation pmc) ... is that the plan?
>> >
>> > Callcc needs to stay--its removal is an oversight.
>>
>> Does it? We can do the same thing (and other, more devious ones) with
>> existing ops. From my understanding of pdd03, the exact implementation
>> would be this:
>>
>> # P0 contains a function object
>> new P1, .Continuation
>> set_addr I4, L1
>> set P1, I4
>> # Setup rest of args
>> invoke
>> L1:
>
>I like it. What do you think Dan?
Works for me.
--
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
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