On Sun, Feb 1, 2009 at 7:26 PM, Mirko Vukovic <mirko.vukovic@gmail.com> wrote:

On Sat, Jan 31, 2009 at 10:23 PM, Liam Healy <lhealy@common-lisp.net> wrote:

...

Mirko,

It looks like there is a bug there in CLISP; symbol-macrolet is a part of the standard and it should work. I have given up on testing in CLISP because I encounter so many errors that seem to be a problem on their side. If you can get a useful answer out of CLISP, that's great, but you should switch to SBCL or CCL if you can because I do test on these.

Liam, I use SBCL at work on my linux box. But at home I have a windows laptop where I use clisp on cygwin. I have not ventured yet into using the windows version of SBCL -- if you have heard of user stories about that I would love to hear them.

If I do find `fixable' problems on CLISP, do you want me to post them here?

If the problem is not due to a bug in CLISP, by all means, post it here. If it is some grey area where CLISP has a problem with some arguably-acceptable construct in GSLL, I will consider changing it if it reasonably straightforward to do so. Maybe using a flet or labels is a workaround for the present problem, but from your description symbol-macrolet is being incorrectly compiled in CLISP. By the way, I put in the :cygwin feature switch in init.lisp for you. Does that work OK?

...

As to whether it should be a symbol-macro or a function call I think it is a style issue. I'm not terribly happy with the macro as it is, I think it requires rethinking anyway, I just hacked through it to get something out that would get rid of the with-c-double. I'll return to it at some point but I have other things I'm working on first.

I may need to use it in the next few weeks. If I come up with something more `elegant', I will post it.

Maybe something like

(with-ode-stepper (stepper ...) ... (do-ode-steps (stopping-test) (post-step-form)) ... )

That looks OK.

I will post the offending example code on the clisp group to get their feedback.

OK.

Mirko

Liam