[Openmcl-devel] compute values in place

Taoufik Dachraoui dachraoui.taoufik at gmail.com
Sun Sep 30 09:49:16 UTC 2012


I was thinking about getmemloc to return the real memory address and not
finding the conses in the expr

I am thinking about something like C pointers

Taoufik

On Sun, Sep 30, 2012 at 11:38 AM, Pascal J. Bourguignon <
pjb at informatimago.com> wrote:

> Taoufik Dachraoui <dachraoui.taoufik at gmail.com> writes:
>
> > is it possible to have something like this:
> >
> > (let ((a '(#1=expr #1#))
> >        (setmemloc (getmemloc (car a)) (eval (car a))))
>
> So it's Sunday, brains are sleeping…
>
> What do you think
>
> >     (let* ((form '#1=(+ 1 2))
> >            (nv (eval form))
> >            (sexp '(#1# 3 #1# #(4 #1# #(5 #1# 6) #1#))))
> >       (values (mapcar (lambda (g.s) (funcall (cdr g.s) nv))
> >                       (find-all-places sexp form))
> >               sexp))
>
> is?
>
>     (defun getmemloc (sexp form)
>       (find-all-places sexp form))
>
>     (defun setmemloc (places new-value)
>       (mapcar (lambda (g.s) (funcall (cdr g.s) new-value)) places))
>
>     (let ((a '(#1=(+ 1 2) 3 #1# #(4 #1# #(5 #1# 6) #1#))))
>        (setmemloc (getmemloc a (car a)) (eval (car a)))
>        a)
>     --> (3 3 3 #(4 3 #(5 3 6) 3))
>
> --
> __Pascal Bourguignon__                     http://www.informatimago.com/
> A bad day in () is better than a good day in {}.
>
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