Hi,

On Fri, Apr 23 2021, Xinglu Chen wrote:

>> Wouldn’t it be nicer to write:
>>
>>   (define-configuration foo
>>     (bar (integer 123) "doc" no-serializer)
>>     (baz (string "") "doc"))
>>
>> where ‘bar’ wouldn’t have a serializer and ‘baz’ would?
>>
>> It’s also probably easier to implement correctly.
>
> I think that would be a good idea, maybe it could also make having a
> default value be optional, like this:
>
> #+begin_src scheme
> (define-configuration foo
>   (bar (integer) "doc" no-serializer) ;no default
>   (baz (string "default") "doc"))
> #+end_src

Since nobody seemed to show any objections, I went ahead and did
something like this myself (see the attached patches).  My macros skills
aren’t that good so I hope I didn’t make any obvious mistakes. :)

I haven’t tested it thoroughly, but at least it didn’t break anything
when I ran ‘./pre-inst-env guix home build ...’. :)