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Re: What "eval" means in score files?

From: Teemu Likonen
Subject: Re: What "eval" means in score files?
Date: Fri, 29 Jan 2010 21:11:56 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

* 2010-01-29 11:53 (-0600), Ted Zlatanov wrote:

> On Thu, 21 Jan 2010 06:11:13 +0200 Teemu Likonen <> wrote:
>> Gnus manual says in "(Gnus) Score File Format":
>>     `eval'
>>          The value of this entry will be `eval'el.  This element will be
>>          ignored when handling global score files.
>> Then what? What should the entry evaluate to? How does Gnus interpret
>> the result of evaluation? How can I use it with scoring?
> Nothing else in the score file is actually eval-ed, so you're limited
> to literal statements. It's like writing a function without macros.
> With an eval clause in the score file you can generate any of the
> other keys, including a string key which maps to a header. It's like
> an in-place macro.

Thanks, that's the kind of feature I'm looking for. So, if I understand
correctly, score file

    ((eval '("from"
             ("Author <...>" 1000 nil e))))

should be effectively equivalent with score file

      ("Author <...>" 1000 nil e)))

But it's not. The score file which uses "eval" has no effect. Could you
(or someone) please give some simple example on how to use it?

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