Re: [PATCH] Allow applying filters to summary consecutively (was: Summary by thread in rmail)

[Eli Zaretskii]

> From: Andrea Monaco <andrea.monaco@autistici.org>
> Cc: emacs-devel@gnu.org, rms@gnu.org
> Date: Mon, 10 Oct 2022 10:38:19 +0200
> 
> 
>   > Without some user ability to take advantage of these new options,
>   > the feature is less useful, IMO.
> 
> I agree.  One possible solution is that for every rmail-summary-by-*
> function, let's say rmail-summary-by-topic, we add another simple
> command called rmail-summary-further-by-topic that looks something like
> this:
> 
> (defun rmail-summary-further-by-topic (subject &optional whole-message)
>   (interactive)
>   (rmail-summary-by-topic subject whole-message t))

I think it could be better to use the prefix argument.  AFAICT, only
one of the Rmail's summary commands already uses the prefix argument,
the rest don't.