RE: [External] : Re: [PATCH] `completing-read`: Add `group-function` support to completion metadata (REVISED PATCH)

[Drew Adams]

> > This doesn't mean that it should be impossible to
> > include in the table (or metadata or whatever) some
> > info that can be used in some ways for presentation.
> 
> Yes, so: don't include presentation, but include extra information
> that can be used to build/choose/refine presentation.

What might that be, in general?

Isn't a function value of `minibuffer-completion-table'
general enough for it to encapsulate any such info you
might want/need?  Don't you already have the means to
include extra info for that?

I don't know - just asking.

Is there really some need to provide specific info or
a specific mechanism for this?  The risk I see is
that doing that might seduce some to hard-wire things
- just what I'd like to avoid.

Is there really something lacking now?

I granted that sometimes (not often, IMO) one might
really want (or even need?) to have some
presentation-helping info in the "table" or in some
metadata or whatever.

But it doesn't follow that something is missing or
needs to be added, for that.  I'm guessing that
what exists is already sufficient for doing that.

If not, just what do you think is needed, and why?