Re: Stepping Back: A Wealth Of Completion systems Re: [ELPA] New package: vertico

[Gregory Heytings]

> > > I think it would be desirable to change the default UI just enough so 
> > > that a code like Xref can make `completing-read` display the 
> > > completions eagerly.
> >
> > I did not follow all the details of the earlier discussion, and I'm not 
> > sure I understand what you mean, but is this not already possible? IIUC 
> > Icomplete for example does this when icomplete-show-matches-on-no-input 
> > is non-nil, and RET selects the first entry.
>
> Icomplete is a completion UI, so of course it can do what it wishes. The 
> question is how can Xref tell the completion UI (whichever the user has 
> chosen to use) that it's a good idea to do it.

IIUC, a variable "completing-read-show-matches-on-no-input" that would be 
setq-local'd by Xref and read by completion UI's would do the job.  Or am 
I missing something?