Simple design question for schemers

Simple design question for schemers

[Hartmut Goebel]

[-- Attachment #1: Type: text/html, Size: 2399 bytes --]

Re: Simple design question for schemers

[Hilton Chain]

Hi Hartmut,

On Sat, 24 Feb 2024 21:47:41 +0800,
Hartmut Goebel wrote:
>
> Hi,
>
> I'm about to refactor the Tryton packages to the (not so) new style. Now the trytond-xxx modules all share a basic list of native
> inputs,like this:
>
>     (native-inputs
>      `(,@(%standard-trytond-native-inputs)
>        ("trytond-account-fr" ,trytond-account-fr)
>        ("trytond-edocument-uncefact" ,trytond-edocument-uncefact)))
>
> Now I wonder what would be the most scheme-like way for doing this in new style?
>
> Using "apply list":
>
>     (native-inputs (apply list
>                           trytond-account-fr
>                           trytond-edocument-uncefact
>                           %standard-trytond-native-inputs ))
>
> Using "append":
>
>     (native-inputs (append %standard-trytond-native-inputs
>                            (list trytond-account-fr
>                                  trytond-edocument-uncefact)))
>
> Using a custom function "extend":
>
>     (native-inputs
>      (extend %standard-trytond-native-inputs
>              trytond-account-invoice
>              trytond-purchase
>              trytond-sale))
>
> Using a custom function "@trytond-module-native-inputs":
>
>     (native-inputs (@trytond-module-native-inputs
>                     trytond-account-invoice
>                     trytond-purchase
>                     trytond-sale))
>
> Opinions?

You may want to use ‘cons*’:
--8<---------------cut here---------------start------------->8---
(cons* trytond-account-fr
       trytond-edocument-uncefact
       %standard-trytond-native-inputs)
--8<---------------cut here---------------end--------------->8---


Thanks

Re: Simple design question for schemers

[Ricardo Wurmus]

Hartmut Goebel <h.goebel@crazy-compilers.com> writes:

> Using a custom function "extend":
>
>     (native-inputs
>      (extend %standard-trytond-native-inputs
>              trytond-account-invoice
>              trytond-purchase
>              trytond-sale))

We have a macro called MODIFY-INPUTS, which you could use, but CONS* is
probably enough in your case.

-- 
Ricardo

Re: Simple design question for schemers

[Hartmut Goebel]

Hi both of you,

Am 25.02.24 um 11:05 schrieb Ricardo Wurmus:
> We have a macro called MODIFY-INPUTS, which you could use, but CONS* is
> probably enough in your case.

Thanks. I'm using cons* now.

cons* basically is the same the "extend" I'm used to from Python - sadly 
the Guile manual is so terrible to understand that I did not get that.


-- 
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@crazy-compilers.com               |
| www.crazy-compilers.com | compilers which you thought are impossible |