From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Adam Porter Newsgroups: gmane.emacs.devel Subject: Re: Docs for &optional and &rest arguments together Date: Tue, 29 Dec 2020 09:10:23 -0600 Message-ID: <87eej8ejhc.fsf@alphapapa.net> References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18668"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Dec 29 16:11:53 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kuGfA-0004lE-OX for ged-emacs-devel@m.gmane-mx.org; Tue, 29 Dec 2020 16:11:52 +0100 Original-Received: from localhost ([::1]:38682 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kuGf9-0002AA-Q7 for ged-emacs-devel@m.gmane-mx.org; Tue, 29 Dec 2020 10:11:51 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55264) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kuGdv-0001Qe-Q0 for emacs-devel@gnu.org; Tue, 29 Dec 2020 10:10:35 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:60122) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kuGdt-0003VB-Fn for emacs-devel@gnu.org; Tue, 29 Dec 2020 10:10:34 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kuGdp-0003BY-96 for emacs-devel@gnu.org; Tue, 29 Dec 2020 16:10:29 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.248, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:262067 Archived-At: This doesn't exactly answer your question, but here's an alternative you might be interested in: I wrote a similar macro a while back, and I tried to follow CL-style arguments by using a list of options. https://github.com/alphapapa/elexandria/blob/83a1b08d0711fdce07a5b33525535cc3a457c6ee/elexandria.el#L105 Here's the source code: (cl-defmacro with-file-buffer (path options &body body) "Insert contents of file at PATH into a temp buffer, and evaluate and return the value of BODY in it. OPTIONS is a plist accepting the following options: `:must-exist': If non-nil, raise an error if no file exists at PATH. `:write': If non-nil, write the contents of the buffer to file at PATH after evaluating BODY. `:overwrite': If nil (or unset), raise an error instead of overwriting an existing file at PATH. If `ask', ask for confirmation before overwriting an existing file. If t, overwrite a file at PATH unconditionally. `:append': Passed to function `write-region', which see. `:visit': Passed to function `write-region', which see." (declare (indent 2)) `(with-temp-buffer (if (file-readable-p ,path) (insert-file-contents ,path) (when ,(plist-get options :must-exist) (error "File not readable: %s" ,path))) (prog1 (progn ,@body) ,(when (plist-get options :write) `(write-region nil nil path ,(plist-get options :append) ,(plist-get options :visit) ,(pcase-exhaustive (plist-get options :overwrite) ('nil ''excl) ((or 'ask ''ask) ''ask) ('t nil)))))))