From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.devel Subject: Why is FUNC in cl-callf not allowed to be an expression? Date: Thu, 09 May 2019 23:52:14 +0200 Message-ID: <874l631ek1.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="233905"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: Emacs Development Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu May 09 23:52:55 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hOqyF-000yko-0r for ged-emacs-devel@m.gmane.org; Thu, 09 May 2019 23:52:55 +0200 Original-Received: from localhost ([127.0.0.1]:33150 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hOqyD-0008G3-VK for ged-emacs-devel@m.gmane.org; Thu, 09 May 2019 17:52:53 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:56040) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hOqxf-0008Fx-FF for emacs-devel@gnu.org; Thu, 09 May 2019 17:52:20 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hOqxe-0001yD-E5 for emacs-devel@gnu.org; Thu, 09 May 2019 17:52:19 -0400 Original-Received: from mout.web.de ([212.227.15.3]:51779) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hOqxe-0001wy-3o for emacs-devel@gnu.org; Thu, 09 May 2019 17:52:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1557438735; bh=ArqE6yYnB9blsm3wZniybclwHNZaegKWHocfEQlWeOI=; h=X-UI-Sender-Class:From:To:Subject:Date; b=r0q/hHSVKzkxFQslYqVj5Txu2QdDAPHd3sHmBxHgzjvEFwN6eSCqBMvrtPmIzcfbY uf3EyQs8cUX24Oyn7s83FzKMC/GDanhhjLtJHbMfffcw7MPKW6l3z6dM64npBXhchB hQ9xTMDr2DdWSJecLj58LkTa2I/ZptBtPjaztpTg= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Original-Received: from drachen.dragon ([88.66.186.107]) by smtp.web.de (mrweb002 [213.165.67.108]) with ESMTPSA (Nemesis) id 0M2us2-1gXReq3gPe-00sgTz; Thu, 09 May 2019 23:52:14 +0200 X-Provags-ID: V03:K1:zcQMXybwJyd8d+ueq1Grgf2kmAMxvi4d5mvbZzykvpaiqWZDUqv 27X+E2jF5flyvQ/HdQg26xTwLP13QdOnU7TwrYtblI0eXA1NzPzOBLcA9OgcqpW8v+fhJ5d LDN5kw1EXaPitxfsqTvbD5XMs1Zl16G0wgaTDhj3woVkIDaRUlfACzK+zTy09LRyIOdDa6w I3whI5ERkS45TTcLuIEMQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:Mkv9knqYevY=:JL2OfOAoxxuduHCgFAY9JL pGUlD6tMnmYsydfrC94mdwOL7itde0JMllBJ5i3/TpOrA2VtommmQFYh8xNSfqeoKPQhsKdaR Tc6bCDViQ7kwy2RMF1QrcxJytPSJP6Zsiq3L2wzD0PL6SPqpwC5cNM0EQQwQ+Fm1d3LA/N4OP s2z8YdRKkOVeuxGMETv+BDBjMAAkBmGDzUHKxKhOsUZDWVsnw7KHrMfdH1lpJ9IGArjb9Eq1G 6h6jOxkaf+wOd6Tx37s6ZeA2EwjT8WNmlQEL/JlYdmpWfDu7G6ST41GyTu8tQcZEQxpTE5miI 9PhAB033sJ9QQwMSbJz7xE/xunCTkZ7E6RKQWgwTMjNDSQXRl3IxTrw6yAKVia9aK7XkFJBbt Lg+6d+Negw/V056/PQn7rp7hcXlYRz8W9R4fbiMi3HwrFebcnSRq9f1A+y7Rz6IHZurGPo6Ub MPWyXxyFyHBAeL24RbFoY1KsUQAwiyULlnFXLe8Uhh7P87YwXtYpnh2VgDNLKGSq1UnT+m9VR W7LDQyLUTpPzksY3i/JmOwrSk9voOI1u3SksBhcsEHRuH0qQhaAdKlvahRYRRKe688UJ1aH+B 8d4iLlaunadBxx/erOmITAvWCyZGbtpBMZQBQ5rxHkWdWQs7afNVQbwvMF+lHpVizA0K+eoJM 7aYZ5CSZeyonbO90pjy3DsboeWMiyeIYyzvfiiwUQmy5WIXRKeSAei6bVUAt2L0/4xhfQ3+F9 rZayqUoz2Rz3H5FII3JVc8tpwkJrVfi3Rv9/0cCgTBh1RisaJ8xqEAo6elckhNkGl11iuApc X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.15.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:236347 Archived-At: Hello, I wonder why the FUNC argument in cl-callf is restricted to symbols (and lambda expressions, though this is not documented). I don't see any reason to disallow arbitrary expressions, besides, maybe, that symbols would become ambiguous. I really would like to have an gv-callf that would simply interpret the function argument as an expression. cl-callf just saves the programmer from typing the #' but forbids many use cases. I think I would even like it most like this: (defmacro gv-callf (call &optional n) (gv-letplace (_getter setter) (nth (or n 1) call) (funcall setter call))) Example: (let ((l (list 1 2))) (gv-callf (append l (list 3 4))) l) => (1 2 3 4) (let ((l (list (list 'c 'd)))) (gv-callf (append (list 'a 'b) (car l) (list 'e 'f)) 2) l) => ((a b c d e f)) That's simpler than current cl-callf, unites cl-callf and cl-callf2 in something more general, and even eldoc still works in the CALL. Michael.