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bug#3811: marked as done (23.0.96; custom-group-members)

From: Emacs bug Tracking System
Subject: bug#3811: marked as done (23.0.96; custom-group-members)
Date: Wed, 15 Jul 2009 18:45:05 +0000

Your message dated Wed, 15 Jul 2009 14:39:05 -0400
with message-id <address@hidden>
and subject line Re: bug#3811: 23.0.96; custom-group-members
has caused the Emacs bug report #3811,
regarding 23.0.96; custom-group-members
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

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3811: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=3811
Emacs Bug Tracking System
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--- Begin Message --- Subject: 23.0.96; custom-group-members Date: Fri, 10 Jul 2009 10:53:13 -0700
emacs -Q
Dunno if this is just a doc bug or a code bug. `custom-group-members'
seems to give the same result - a list of groups, whether its second
arg GROUPS-ONLY is nil or t. I don't see any difference.
Even if there are some cases where there would be a difference, the
doc string is unclear, because it doesn't say what the alternative
is. What should you expect if GROUPS-ONLY is nil, other than groups?
What else might be included in the list?
FWIW, I was looking for a function that, given a group, would return a
list of all options and faces in that group (directly, not by
inheritance). From the function name and doc string, I thought perhaps
`custom-group-members' would do the job (with a nil arg). Apparently
not. But I don't know what it is _supposed_ to do when GROUPS-ONLY is

In GNU Emacs (i386-mingw-nt5.1.2600)
 of 2009-07-09 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'

--- End Message ---
--- Begin Message --- Subject: Re: bug#3811: 23.0.96; custom-group-members Date: Wed, 15 Jul 2009 14:39:05 -0400 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.94 (gnu/linux)
>            (let ((direct-members  (custom-group-members symbol nil)))
>              (dolist (dm  direct-members)
>                (if (eq (cadr dm) 'custom-group)
>                    (setq members
>                          (nconc (custom-group-members (car dm) nil t)
>                                 members))

Beware of infinite-recursion since the groups aren't guaranteed to form
a DAG.

> It would be even better to combine args GROUPS-ONLY and RECURSIVEP, but that
> might mean problems for backward incompatibility. But perhaps something like
> this would be OK?

Don't know.  Depends if you want to be able to get "all groups,
recursively" or not.

> We might also consider making this a command. Users could use it to
> print out a list of the options and faces for a group.

> Note that one use of the proposed recursive behavior is for a user to
> create a custom group that represents a collection of personal
> settings (across other custom groups), and then to share those
> settings with others. (See the emacs-devel discussion of "skins" as
> custom groups.)

> A user Jane could, for example, use `custom-add-to-group' with group
> `jane', and then she could publish the `jane' settings for others,
> retrieving them using `custom-group-members'. The only other piece
> missing would then be a way for non-Lisp users to do the equivalent of
> `custom-add-to-group' using only the Customize UI. That is, we would
> provide easy ways to specify that certain options and faces should be
> added to group `jane'.

Isn't that going in the same direction as Custom themes?
In any case, it's way out of the scope of this bug report, which
I hence close.


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