Re: result of completing-read contradicting require-match

[Jean Louis <bugs@gnu.support>]

* Yuri Khan <yuri.v.khan@gmail.com> [2022-07-02 22:56]:
> On Sun, 3 Jul 2022 at 02:29, Jean Louis <bugs@gnu.support> wrote:
> 
> > REQUIRE-MATCH can take the following values:
> > - a function, which will be called with the input as the parameter.
> >   If it returns a non-nil value, the minibuffer is exited with that value.
> 
> > other way to persist asking until you get the true result is here:
> >
> > (defun rcd-repeat-until-not-empty-string (function &rest args)
> >   "Repeat FUNCTION with optional ARGS until result is not empty string."
> >   (let ((result))
> >     (while (string-empty-p (setq result (apply function args))))
> >       result))
> 
> Based on the quoted part of the docstring, you could probably pass a
> function that returns t for an allowed value, and nil for disallowed
> values, including an empty string or nil.

Do you mean from `completing-read':

"- a function, which will be called with the input as the parameter.
  If it returns a non-nil value, the minibuffer is exited with that value."

Do you mean this:

(let* ((cseq '("name" "name-mode"))
       (csel (completing-read "Type: " cseq nil FUNCTION-HERE? nil )))
  csel)

and what would be value name for function to check it?


-- 
Jean

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