regexp completion (was: kill-ring visualization)

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> PS: I do not know how to do regexp-style completion, to tell you the
>> truth.  I.e. I know how to implement the all-completions part of it,
>> obviously, but I don't know how to then merge the matches into something
>> suitable for try-completion.  I guess you could just apply
>> try-completion to the list of matches, but that would only lead to
>> something useful if the matches share some prefix.

> Currently a `*' in the completion string acts as the simplest regexp
> (wildcard), and it does its job pretty well.  Couldn't this be extended
> to the true regular expressions?

It probably could, but I don't know *how*.  But maybe it's because I'd
want it to do something more than what it can.  I.e. maybe the "trivial"
answer is pretty much the only answer.


        Stefan