Re: unrecognized pattern operator list

[Damien Mattei <damien.mattei@gmail.com>]

     one of problem is coming from the special syntax of kawa that use
[ ] where others scheme don't and incompatible with SRFI 105, this
limits some use.
like: in type[] or match with patterns looking like ([_ y] ...
this would be a good idea to have an option in Kawa that allow
replacing those [ ] by normal ( ) or even be compatible with the 2
syntaxes should be possible

in my case i dislike 'match form and do not using typing in scheme
when available so this not a big problem in my codes but for now i do
not know how to modify the SRFI-105 reader for be compatible. It is
also possible to parse it with SRFI 105 and after modify again the
code to set back the transformed [] in () again in [] in 'match and
type[]  ....


On Mon, Oct 9, 2023 at 4:48 PM Damien Mattei <damien.mattei@gmail.com> wrote:
>
> hello,
>
> in this code belonging from Guile and Racket version:
>
> (match (list index1-or-keyword-eval-pos index2-or-keyword-eval-pos
> index3-or-keyword-or-step-eval-pos)
>
>
>
>
>      ;;  {a <+ (make-vector 7 0)}
>      ;; '#(0 0 0 0 0 0 0)
>      ;; > {a[$ $] <- #(1 2 3)}
>      ;; > a
>      ;; '#(1 2 3 0 0 0 0)
>      ((list (== slice) (== slice))
>       (container-copy! container-eval
>                0
>                expr-eval)
>
> i have this error:
> unrecognized pattern operator list near ((list (== slice) i2 (== slice))
> slice is defined like that:
>
> (define $ '$)
> (define slice $)
>
> what is the equivalent syntax for kawa?
>
> damien