[parenscript-devel] Looking for examples to pass lisp values into parenscript

[Daniel Gackle]

There is also the 'lisp macro which can be used from inside a Parenscript
expression:

(ps:ps (setf y (lisp (* 2 2))))
=> "y = 4;"

This allows your example to work if we declare x special:

(let ((x 1))
  (declare (special x))
  (ps:ps (setf y (lisp x))))
=> "y = 1;"

But it doesn't pick up the lexical environment:

(let ((x 1))
  (ps:ps (setf y (lisp x))))
  => [Condition of type UNBOUND-VARIABLE]

This is true even when PS is the current package. Can anyone (Vladimir?)
explain whether it has to be this way? Or could PS be extended to pick up
lexical bindings as well?

Daniel






On Mon, Mar 17, 2008 at 4:25 PM, Simon Cusack <scusack at fastmail.com.au>
wrote:

> Hi Wout,
>
> On Mon, 17 Mar 2008 23:56:34 +0000
> Wout Perquin <hedres at skynet.be> wrote:
>
> > Hi,
> > I am looking for examples that show how lisp data can be passed to ps
> > scripts.  E.g. :
> > I would like that
> > (let ((x 1))
> >   (ps:ps (setf y x)))
> > is translated into :
> > "y = 1;"
> > in other words, how do I refer from within a parenscript construct to
> > the lisp environment to collect a value ?
> > Many thanks,
> > -Wout
>
> I use ps:ps* like so;
>
> (let ((x 1))
>  (ps:ps* `(setf y ,x)))
>
> - sim
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