Re: append, push, and add-to-list.

[Hongyi Zhao]

On Mon, Jul 5, 2021 at 12:01 AM Jean Louis <bugs@gnu.support> wrote:
>
> * Hongyi Zhao <hongyi.zhao@gmail.com> [2021-07-04 16:52]:
> > I'm curious why `add-to-list' must take 'company-backends, i.e.,
> > (quote company-backends) as one of its argument, while the other
> > functions can directly use the unquoted form.
>
> It must not. But add-to-list is by tradition older and more used
> function. And it will not require cl library such as `cl-pushnew'.
>
> I am verifying:
>
> (type-of company-backends) ⇒ cons
>
> (company-bbdb company-eclim company-semantic company-clang
>               company-xcode company-cmake company-capf company-files
>               (company-dabbrev-code company-gtags company-etags
>               company-keywords) company-oddmuse company-dabbrev)


See my results obtained by putting `(type-of company-backends)' in
scratch buffer, and with the point on any part of `company-backends',
then hit `M-.':

(defcustom company-backends `(company-bbdb
                              ,@(unless (version<= "26" emacs-version)
                                  (list 'company-nxml))
                              ,@(unless (version<= "26" emacs-version)
                                  (list 'company-css))
                              company-semantic
                              company-cmake
                              company-capf
                              company-clang
                              company-files
                              (company-dabbrev-code company-gtags company-etags
                               company-keywords)
                              company-oddmuse company-dabbrev)


>
> This is the list, so you may use any method you wish to put elements
> in the list.
>
> --
> Jean
>
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-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China