Changing completion-style using the minibuffer

[arvid-harnack@lavache.com]

Is there an alternative to your attempt, so I could use the arrow
keys to move from one option to the other?

And an option at the and that allows me to manually write down
the completion-styles string in the minibuffer.

That way I can either use the predefined settings in collections
or input my own multiple completion style string in the variable
`completion-styles'.



Many Thanks




From: Jean Louis <bugs@gnu.support>
To: arvid-harnack@lavache.com
Subject: Re: Changing completion-style using the minibuffer
Date: 12/06/2021 04:49:38 Europe/Paris
Cc: help-gnu-emacs@gnu.org

* arvid-harnack@lavache.com <arvid-harnack@lavache.com> [2021-06-11 23:03]:
> I have the following code to change completion-styles by calling "M-x minibufrp-complt-style".
> 
> 
> 
> But would like to change it so that I can go through the four selections using the minibuffer.
> 
> What would I need to add exactly to be able to do so ?


(defvar k 1)

In itself the below function is just looking to variable `k' and
makes changes based on its value. If you wish to change the
variable `completion-styles' you need not have any other
variable.

(defun minibufrp-complt-style ()
(interactive)
(pcase k
(1
(setq completion-styles '(basic substring))
(setq k 2))
(2
(setq completion-styles '(partial-completion))
(setq k 3))
(3
(setq completion-styles '(initials))
(setq k 4))
(4
(setq completion-styles '(orderless))
(setq k 1)) ))

Following could be solution for multiple choice:

(defun minibufrp-complt-style ()
(interactive)
(let* ((collection '((?b '(basic substring) "Basic Substring")
(?p '(partial-completion) "Partial Completion")
(?i '(initials) "Initials")
(?o '(orderless) "Orderless")))
(style (read-multiple-choice "Style: " collection)))
(setq completion-styles (nth 1 style))))

Overall that does not nicely solve the problem as you may wish to
have multiple completion styles in the variable
`completion-styles' and you may get in trouble doing it that way.


-- 
Jean