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Re: Programmatically access all the possible values of a defcustom
From: |
Sebastien Vauban |
Subject: |
Re: Programmatically access all the possible values of a defcustom |
Date: |
Thu, 30 Jan 2014 13:40:26 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (windows-nt) |
Nicolas Richard wrote:
> "Sebastien Vauban" writes:
>> Now, I'll have to play with the list to obtain what I really want:
>> a string like...
>>
>> Awk, C, R, Asymptote, Calc, Clojure, CSS, Ditaa, Dot, Emacs Lisp,
>> Fortran
>
> The objects are "widgets", so e.g.
>
> (widget-get (get 'org-babel-load-languages 'custom-type) :key-type)
>
> will get you to the (choice ...) data which is documented at (info
> "(widget) composite")
>
> I'm unsure what's the best way to get rid of the [keyword value] pairs
> and only map over each inner (const ...) widget ; there ought to be
> something defined within the widget library but i couldn't find it. Or
> maybe my whole approach is wrong, I don't know.
>
> Anyway, this works for me :
>
> (mapconcat (lambda (widget)
> (widget-get widget :tag))
> (cl-remove-if-not (lambda (it)
> (and (consp it)
> (eq (car it) 'const)))
> (cdr
> (widget-get
> (get
> 'org-babel-load-languages 'custom-type)
> :key-type)))
> ", ")
You save me *a lot* of time: I'd have to "play" a lot before arriving to
such a code. Thanks! (and it's perfectly what I was after)
Best regards,
Seb
--
Sebastien Vauban