Re: Figuring out enums and structs with foreigners

Hi Felix,

On Sun, Mar 23, 2025 at 08:23:30PM +0100, felix.winkelmann--- via Chicken-users wrote:
> the internals of modules, but foreigners happens to define foreign types
> so that the defined entities can be used in foreign function declarations.

Yeah, I noticed that (define-external (foo (TYPE arg)) ...) works for a TYPE
defined with foreigners being it a struct or an enum. I think that is what you
meant. And this precisely my use case, I am trying to write my own
define-external.

> (define-syntax ftype
>   (er-macro-transformer
>     (lambda (x r c)
>       ;; retrieve registered foreign type
>       (print `(,(cadr x) ,(chicken.compiler.support#lookup-foreign-type (cadr x))))
>       #t)))

It looks dangerous, indeed. I'll use with care. Thank you for the tip.

Regards,
-Diogo