From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Lennart Borgman (gmail)" Newsgroups: gmane.emacs.devel Subject: Re: Shift selection using interactive spec Date: Sat, 29 Mar 2008 02:15:03 +0100 Message-ID: <47ED9817.8060400@gmail.com> References: <87k5k69p92.fsf@stupidchicken.com> <8763vndi0r.fsf@kfs-lx.rd.rdm> <87hcf6ratt.fsf@stupidchicken.com> <878x0if9ul.fsf@stupidchicken.com> <87od9e9gnx.fsf@stupidchicken.com> <87skyo5bvk.fsf@stupidchicken.com> <87skynrin5.fsf@stupidchicken.com> <87iqzju0lq.fsf@kfs-lx.rd.rdm> <851w5xx5ya.fsf@lola.goethe.zz> <87ve3993dt.fsf@jurta.org> <47EA37C7.7080502@gmail.com> <878x050yp0.fsf@jurta.org> <878x03ybyg.fsf@jurta.org> <871w5upcsc.fsf@jurta.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1206753332 8242 80.91.229.12 (29 Mar 2008 01:15:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 29 Mar 2008 01:15:32 +0000 (UTC) Cc: jared@hpalace.com, rms@gnu.org, emacs-devel@gnu.org To: Juri Linkov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Mar 29 02:16:02 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1JfPft-0002G1-Jm for ged-emacs-devel@m.gmane.org; Sat, 29 Mar 2008 02:16:01 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JfPfH-00088b-UK for ged-emacs-devel@m.gmane.org; Fri, 28 Mar 2008 21:15:23 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1JfPfE-000886-0X for emacs-devel@gnu.org; Fri, 28 Mar 2008 21:15:20 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1JfPfC-00087T-Cl for emacs-devel@gnu.org; Fri, 28 Mar 2008 21:15:19 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JfPfC-00087P-5o for emacs-devel@gnu.org; Fri, 28 Mar 2008 21:15:18 -0400 Original-Received: from ch-smtp01.sth.basefarm.net ([80.76.149.212]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1JfPf8-0006X1-6n; Fri, 28 Mar 2008 21:15:14 -0400 Original-Received: from c83-254-150-27.bredband.comhem.se ([83.254.150.27]:59985 helo=[127.0.0.1]) by ch-smtp01.sth.basefarm.net with esmtp (Exim 4.68) (envelope-from ) id 1JfPf5-0002fC-5y; Sat, 29 Mar 2008 02:15:12 +0100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666 In-Reply-To: <871w5upcsc.fsf@jurta.org> X-Antivirus: avast! (VPS 080328-0, 2008-03-28), Outbound message X-Antivirus-Status: Clean X-Originating-IP: 83.254.150.27 X-Scan-Result: No virus found in message 1JfPf5-0002fC-5y. X-Scan-Signature: ch-smtp01.sth.basefarm.net 1JfPf5-0002fC-5y 8d7897cc2e9c54cf985951a690077735 X-detected-kernel: by monty-python.gnu.org: Linux 2.6? (barebone, rare!) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:93731 Archived-At: Juri Linkov wrote: >> The hard part is to figure out a good design for it. >> >> It is important to support both returning a single value and returning >> a list of values. There could be a character at the beginning of the >> interactive output string which specifies that it's a list of values. >> Otherwise it is one value. >> >> But what do we use after that? >> >> It could be a format string to format the values. >> Is that general enough? >> >> And what about using Lisp code for how to format the value? >> How would that Lisp code refer to the value itself? >> Perhaps that Lisp code should take the form of a lambda expression. >> >> But how do we specify whether it wants a list of values or a single >> value? I don't see any clean and natural way to specify that. > > As I understand the purpose of this feature is practically to move > the last expression of the command's body that usually is written as > > (if (interactive-p) > (message "Result of this command is %.0f" return-value) > (format "%.0f" return-value)) > > to the second argument of `interactive'? > > If so, then I see no way to generalize this expression as it can be > anything allowed in Lisp. I can't understand the usefulness of this feature for an interactive function. Why not just do something like the above? But there is another rather similar feature that I think would be useful: handling of errors differently when a function is called interactively. I think the current implementation with debug-ignored-errors is a bug since it does not distinguish when a function is called interactively or not. This can be cured in other ways too, of course.