Re: [Maxima-discuss] Calling user-defined function from lisp

[Thomas B. <bar...@gm...>]

On Wed, 7 Sep 2022, Michel Talon wrote:
> Le 07/09/2022 à 20:17, Thomas Baruchel a écrit :
>> Hi,
>>
>> I wrote large parts of my scripts in Lisp, calling Maxima functions from
>> within the Lisp code. Knowing the $ naming convention, it is easy to call
>> Maxima functions, but I can't manage to call a user-defined function, even
>> by adding the $-sign in front of the name.
>>
>> How can I do this?
>>
>> Best regards,

> To add to the other answers, this is because "user-defined maxima functions"
> are not really functions

Thank you to all of you. It now works as expected.

Maybe a slightly different question however. Is it possible to access Maxima
as a "library" without having to start the interpreter as itself.

I mean: currently, I have to

   * run Maxima;
   * load some Lisp script containing a $main function
   * run (from Maxima) the "main" function

It works greatly, but I don't like too much the idea of having three layers:

   * Maxima interpreter at the toplevel
   * Main loop and most of the work in Lisp code called from Maxima
   * from time to time calling back Maxima from my Lisp code.

Assuming I don't want (this time) to define any function in Maxima, but only
use some core functions, I would expect the following process to work:

   * compile maxima but replace

       (sb-ext:save-lisp-and-die "binary-sbcl/maxima.core" :toplevel #'cl-user::run)

     with

       (sb-ext:save-lisp-and-die "binary-sbcl/maxima.core")

   * run sbcl with    sbcl --core maxima.core --load myfile.lisp
   * calling (for instance) $sqrt from within myfile.lisp

But it doesn't work.

Again, I can already do what I want with my workaround, but curious about it.

Best regards,

--
Thomas Baruchel