Re: inputting characters by hexadigit

[Lennart Borgman (gmail)]

Drew Adams wrote:
> > > > > > > > How about having `completing-read' just call a
> > > > > > > > `completing-read-function' variable if non-nil?
> > > > > > > > This is the same thing that `read-file-name' does,
> > > > > > > > with `read-file-name-function'.
> > > > > > > It sounds useful to authors of Emacs extensions and 
> > > > > > > might even be useful directly for end users, letting
> > > > > > > them decide what completing-read function they feel
> > > > > > > like using on any particular day.
> > > > > > I agree. Is there any reason not to add 
> > > > > > completing-read-function?
> > > > > No one has objected to the idea.
> > > > > Could someone please implement this?
> > > Let's wait when Stefan moves completing-read to 
> > > minibuffer.el and then just add
> > > (if completing-read-function
> > >     (funcall completing-read-function ;-)
>
>
> SM> I'm not opposed to such a change, but I have other things
> SM> to do. So if someone else wants to install such a thing,
> SM> he should go right ahead.
>
> I hope someone will please do that. Thanks.

Could not this be done by just renaming the C function completing-read 
to completing-read-1 and then adding

(defun completing-read (prompt
                        collection
                        &optional predicate require-match
                        initial-input hist def
                        inherit-input-method)
  ... documentation ...
  (if completing-read-function
      (funcall completing-read-function ...)
    (completing-read-1 ...)))

to minibuffer.el?