From: Chip Salzenberg <[EMAIL PROTECTED]>
Date: Sat, 24 Jun 2006 21:56:32 -0700
On Sat, Jun 24, 2006 at 11:18:41PM -0400, Bob Rogers wrote:
> Such an implementation is truly and utterly stackless, which means that
> dynamic-wind needs to keep its own stack explicitly, and similarly for
> dynamic binding (which, IIUC, is generally implemented in terms of
> dynamic-wind).
... actually describes Parrot, present and future. Parrot doesn't need to
recurse in C to invoke continuations or closures . . .
Understood. However, Parrot uses an explicit chain of "Parrot_Context
=> RetContinuation => Parrot_Context => ...", which (IIUC) is something
a pure CPS implementation does not require. That's all I meant.
And my intended implementation of dynamic-wind actually does require
its own stack, separate from the current control stack . ..
Is there a PDD forthcoming? If not (or even if so), would you (Allison
now, presumably?) like help writing it?
-- Bob Rogers
http://rgrjr.dyndns.org/
