Using CL in Gnus (was: gnus-agentize versus emacs 20 mapc)

[Reiner Steib <4.uce.03.r.s@nurfuerspam.de>]

On Wed, Nov 26 2003, Katsumi Yamaoka wrote:
>>>>>>	Kevin Ryde <user42@zip.com.au> wrote:

[ spam-stat.el ]
>> Looks like this one has its own trickery to drag in 'cl when required.
>> With dgnushack doing it perhaps that's no longer wanted.
>
> That is only for smap-stat and Emacs 20 users.  However, mapc
> you wrote about is in gnus-agent.el and gnus.el which may be
> used by most of Gnus and Emacs 20 users.

IMHO, the point isn't how many users are affected by loading cl, but
that all GNU Emacs packages (thus Gnus) should not load it at run time
at all:

,----[ (info "(cl)Overview") in Emacs CVS HEAD ]
|    *Please note:* the "CL" functions are not standard parts of the
| Emacs Lisp name space, so it is legitimate for users to define them
| with other, conflicting meanings.  To avoid conflicting with those user
| activities, we have a policy that packages installed in Emacs must not
| load "CL" at run time.  (It is ok for them to load "CL" at compile time
| only, with `eval-when-compile', and use the macros it provides.)  If
| you are writing packages that you plan to distribute and invite
| widespread use for, you might want to observe the same rule.
`----

OTOH, Gnus 5.10.x (labeled Gnus 5.11) will be included in Emacs 21.y
where the relevant functions for `spam-stat.el' (gethash
hash-table-count make-hash-table mapc puthash) are built-in functions
already.  So I'm not sure how relevant it is to avoid mapc and friends
in Gnus 5.10.

Bye, Reiner.
-- 
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