On 3/7/23 20:52, Bruno Barbier wrote:
> Zelphir Kaltstahl<zelphirkaltstahl@posteo.de>  writes:
>
>
>> If org merely wraps in a `let`, it should not notice any of the multiple values
>> business, because that is something done internally in `let-values`.
>>
> The "let", to define the org variables, ends up putting the "import"
> inside the scheme expression, like this:
>
>        ;; -*- geiser-scheme-implementation: guile -*-
>        (let ((x '1)
>              (y '2))
>        (import (except (rnrs base) error vector-map)
>                 (only (guile)
>                       lambda*
>                       λ)
>                 ;; let-values
>                 (srfi srfi-11))
>
>        (let-values ([(a b) (values x y)])
>           (simple-format #t "~a ~a\n" a b))
>        )
>
>
> which raises an error when evaluated the first time (the second time,
> the "import" has already imported the new "let-values" feature
> (srfi-11), so, the evaluation works). You can test this manually in a
> guile session.
>
> I guess you'll have to use sessions, and do the "import" in a separate
> block first.
>
> Bruno

Actually, now that I think about it, the whole problem is gone, when replacing 
the wrapping let with 2 separate (define ...), which I originally thought org 
would do:

~~~~START~~~~
$ guile
GNU Guile 3.0.9
Copyright (C) 1995-2023 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> (define x 1)
scheme@(guile-user)> (define y 2)
scheme@(guile-user)> (import (except (rnrs base) error vector-map)
...         (only (guile)
...               lambda*
...               λ)
...         ;; let-values
...         (srfi srfi-11))
scheme@(guile-user)> (let-values ([(a b) (values x y)])
...   (simple-format #t "~a ~a\n" a b))
1 2
~~~~~END~~~~~

Or in one input to the REPL:

~~~~START~~~~
$ guile
GNU Guile 3.0.9
Copyright (C) 1995-2023 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> (define x 1)
scheme@(guile-user)> (define y 2)
scheme@(guile-user)> (import (except (rnrs base) error vector-map)
...         (only (guile)
...               lambda*
...               λ)
...         ;; let-values
...         (srfi srfi-11))
scheme@(guile-user)> (let-values ([(a b) (values x y)])
...   (simple-format #t "~a ~a\n" a b))
1 2
~~~~~END~~~~~

Is there a reason it has to be wrapped in a let, instead of simply define-ing 
the variables?

Regards,
Zelphir

-- 
repositories:https://notabug.org/ZelphirKaltstahl