With imported functions instead of module?

With imported functions instead of module?

[Marc Coquand]

Hiya!

When creating scripts in guile that uses G-expressions, it's nice to
break out parts into separate functions.

Is there a way to import functions instead of entire modules?

Thanks in advance,

-- 
Marc

Re: With imported functions instead of module?

[Felix Lechner via]

Hi Marc,

On Thu, Dec 12 2024, Marc Coquand wrote:

> Is there a way to import functions instead of entire modules?

Are you looking for something more than the selective import of module
bindings via '@'? [1]

Kind regards
Felix

P.S. In Guile, the preferred term for functions may be procedures.

[1] https://www.gnu.org/software/guile/manual/html_node/Using-Guile-Modules.html#index-_0040

Re: With imported functions instead of module?

[Marc Coquand]

Hmm,

Well essentially what I'm looking for is an easier way of importing
procedures within G-expressions.

So basically if I have

(define (my-procedure args)
   ...)

(define notify-mail-gexp
  (with-imported-modules
   '((guix build utils)
   ...)
   #~(begin
   (my-procedure)))

I'm wondering if there is a way to call my-procedure without moving the
definition to a separate module and importing that module in the
"with-imported-modules" 

-- 
Marc

On Thu, Dec 12 2024, Felix Lechner wrote:

> Hi Marc,
>
> On Thu, Dec 12 2024, Marc Coquand wrote:
>
>> Is there a way to import functions instead of entire modules?
>
> Are you looking for something more than the selective import of module
> bindings via '@'? [1]
>
> Kind regards
> Felix
>
> P.S. In Guile, the preferred term for functions may be procedures.
>
> [1] https://www.gnu.org/software/guile/manual/html_node/Using-Guile-Modules.html#index-_0040

Re: With imported functions instead of module?

[Felix Lechner via]

Hi Marc,

On Thu, Dec 12 2024, Marc Coquand wrote:

> I'm looking for is an easier way of importing procedures within
> G-expressions.

I'm not sure that's possible because the G-exp could, in the most
generalized case, run on another piece of equipment.

> I'm wondering if there is a way to call my-procedure without moving the
> definition to a separate module

You could 'define' your procedure inside the G-exp, although that may
not be what you want.

You may also be able to use 'load' on a store item (think 'plain-file'
and friends).  Those are automatically copied to the build side.

Kind regards
Felix

Re: With imported functions instead of module?

[Marc Coquand]

All right, thanks. Then I think the best approach is to just have a
separate module that I import.

-- 
Marc