[O] Re: Completing with anything

[Dimitri Fontaine]

Stefan Monnier <address@hidden> writes:
> As Tassilo mentions, maybe we could have a post-completion step that can
> perform some kind of expansion/replacement/cleanup once a valid
> completion is selected.  I'm not sure what that would look like in terms
> of code and API, but if someone wants to try it out a propose a patch to
> start a discussion, maybe we could add such a thing.

That looks a lot like  (info "(emacs) Mail Aliases").

In particular see mailabbrev.el and the functions
mail-abbrev-insert-alias and mail-abbrev-complete-alias.

Also (add-hook 'message-mode-hook 'mail-abbrevs-setup).

Regards,
-- 
dim