Re: Embedded list selection with ido-completing-read.

[Hongyi Zhao <hongyi.zhao@gmail.com>]

On Mon, Oct 25, 2021 at 12:23 AM Emanuel Berg via Users list for the
GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:
>
> Hongyi Zhao wrote:
>
> >> 1) Use a formal parameter.
> >>
> >> 2) Don't do anything in the `interactive' form except
> >>    get/assign the argument(s).
> >>
> >> 3) Test interactively and non-interactively (i.e., from Lisp).
> >>
> >> (defun atomic-position (flag)
> >>   (interactive
> >>    (list (completing-read
> >>           "flag: "
> >>           '("alat" "angstrom" "bohr" "crystal" "crystal_sg") )))
> >>   (insert (format "Atomic Kitten: %s" flag) ))
> >
> > I've tried to rewrite the following more complex function
> > written by me by your above rules/guidelines, but still
> > failed to do the trick
>
> ... ? Is this for real?
>
> Do 1-2, then 3.

But the formal parameter isn't used in the `interactive' part of your code:

(defun atomic-position (flag)
  (interactive
   (list
    (completing-read "flag: " '("alat" "angstrom" "bohr" "crystal"
"crystal_sg") nil t)))
  (insert (format "Atomic position: %s\n" flag)))

This makes it difficult for me to adapt the above code to a
multi-parameter situation.


> > (defun ATOMIC_POSITIONS ()
> >   (interactive
> >    (let* ((prog '("neb" "pw" "cp"))
> >       (prog-read (completing-read "prog: " prog))
> >       )
> >
> >      (cond ((or (equal prog-read "neb")
> >         (equal prog-read "pw"))
> >         (insert "ATOMIC_POSITIONS "
> >             (completing-read "flag: "
> >                      '("alat" "bohr" "angstrom" "crystal" "crystal_sg"))))
> >        ((equal prog-read "cp")
> >         (insert "ATOMIC_POSITIONS "
> >             (completing-read "flag: "
> >                      '("alat" "bohr" "angstrom" "crystal")))))
> >      ))
> >   (newline 1))
>
> ...
>
> --
> underground experts united
> https://dataswamp.org/~incal