From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-2.1 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED,
	RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham
	autolearn_force=no version=3.4.4
Received: (qmail 12427 invoked from network); 21 Feb 2021 00:36:28 -0000
Received: from mx1.math.uh.edu (129.7.128.32)
  by inbox.vuxu.org with ESMTPUTF8; 21 Feb 2021 00:36:28 -0000
Received: from lists1.math.uh.edu ([129.7.128.208])
	by mx1.math.uh.edu with esmtps  (TLS1.3) tls TLS_AES_256_GCM_SHA384
	(Exim 4.94)
	(envelope-from <ding-owner+M38167=ml=inbox.vuxu.org@lists.math.uh.edu>)
	id 1lDcja-003Hhe-PP
	for ml@inbox.vuxu.org; Sat, 20 Feb 2021 18:36:26 -0600
Received: from localhost ([127.0.0.1] helo=lists.math.uh.edu)
	by lists1.math.uh.edu with smtp (Exim 4.94)
	(envelope-from <ding-owner+M38167=ml=inbox.vuxu.org@lists.math.uh.edu>)
	id 1lDcja-00E0Ao-79
	for ml@inbox.vuxu.org; Sat, 20 Feb 2021 18:36:26 -0600
Received: from mx2.math.uh.edu ([129.7.128.33])
	by lists1.math.uh.edu with esmtps  (TLS1.3) tls TLS_AES_256_GCM_SHA384
	(Exim 4.94)
	(envelope-from <ding-account@m.gmane-mx.org>)
	id 1lDcjZ-00E0Ai-8N
	for ding@lists.math.uh.edu; Sat, 20 Feb 2021 18:36:25 -0600
Received: from quimby.gnus.org ([95.216.78.240])
	by mx2.math.uh.edu with esmtps  (TLS1.3) tls TLS_AES_256_GCM_SHA384
	(Exim 4.94)
	(envelope-from <ding-account@m.gmane-mx.org>)
	id 1lDcjX-003BjC-B1
	for ding@lists.math.uh.edu; Sat, 20 Feb 2021 18:36:24 -0600
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org;
	 s=20200322; h=Content-Type:Mime-Version:References:Message-ID:Date:Subject:
	From:To:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID:
	Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc
	:Resent-Message-ID:In-Reply-To:List-Id:List-Help:List-Unsubscribe:
	List-Subscribe:List-Post:List-Owner:List-Archive;
	bh=QXQPWEd5aDKgw2Gep2KpCxZ9Fxg96wBNkw8NWwjKWvY=; b=VuzsIdH8cd6M875Q20ktDCziFC
	5YzDAXWQ5c1YKTZ41XZ6FE6uxdTiIlJXOtVUcRktmhGCsuph0eJ9leOBZN9nZA9seRYScndClPjd3
	s2HM1wj0SvinLJ+1cirkjLAib7m15doa0JkbVbXGBcFyUjp/EjCMr3QR0ASaOyTpJZfI=;
Received: from ciao.gmane.io ([116.202.254.214])
	by quimby.gnus.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <ding-account@m.gmane-mx.org>)
	id 1lDcjQ-0001N5-HY
	for ding@gnus.org; Sun, 21 Feb 2021 01:36:19 +0100
Received: from list by ciao.gmane.io with local (Exim 4.92)
	(envelope-from <ding-account@m.gmane-mx.org>)
	id 1lDcjP-0003qx-Br
	for ding@gnus.org; Sun, 21 Feb 2021 01:36:15 +0100
X-Injected-Via-Gmane: http://gmane.org/
Mail-Followup-To: ding@gnus.org
To: ding@gnus.org
From: Emanuel Berg <moasenwood@zoho.eu>
Subject: Re: how can I convert the To field to CC
Date: Sun, 21 Feb 2021 01:36:08 +0100
Message-ID: <871rda5kav.fsf@zoho.eu>
References: <87k0r3kc70.fsf@mat.ucm.es> <87a6rzmtmw.fsf@zoho.eu>
	<87blcfghv2.fsf@mat.ucm.es> <87k0r27eao.fsf@zoho.eu>
	<87ft1qe5qd.fsf@mat.ucm.es> <87mtvye3nn.fsf@dick> <87blce5kub.fsf@zoho.eu>
Mime-Version: 1.0
Content-Type: text/plain
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)
Cancel-Lock: sha1:ffaFmXKRpzCX6UhNBqbFimno/q8=
Mail-Copies-To: never
List-ID: <ding.gnus.org>
Precedence: bulk

> (defun my/message-swap-to-cc ()
>   (interactive)
>   (when-let ((to (or (message-field-value "To") ""))
>              (cc (or (message-field-value "Cc") "")) )
>     (message-replace-header "To" cc "From")
>     (message-replace-header "Cc" to "To")))

This also cannot do multiliners and the reason is
`message-field-value' which I also used. One could consider
that a bug in Emacs. Maybe not the BIGGEST bug.

-- 
underground experts united
http://user.it.uu.se/~embe8573
https://dataswamp.org/~incal