From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Proposal: Forwards-Compatibility Library for Emacs Date: Tue, 21 Sep 2021 06:10:51 +0200 Message-ID: <87wnnafu0k.fsf@gnus.org> References: <877dfavmzw.fsf@posteo.net> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20619"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Philip Kaludercic Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Sep 21 06:11:47 2021 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 1mSX8E-00052S-RX for ged-emacs-devel@m.gmane-mx.org; Tue, 21 Sep 2021 06:11:46 +0200 Original-Received: from localhost ([::1]:58758 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mSX8C-0004uu-Cj for ged-emacs-devel@m.gmane-mx.org; Tue, 21 Sep 2021 00:11:44 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55252) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mSX7U-0003lh-IR for emacs-devel@gnu.org; Tue, 21 Sep 2021 00:11:00 -0400 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:57252) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mSX7T-0007la-3j for emacs-devel@gnu.org; Tue, 21 Sep 2021 00:11:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=8SIlQgTcFdzaSmecB5T7tkxgOaPess0SltZ6qWHrClI=; b=rp54SFfAzb02BdYA6QX+zJJCOr SCJhEhqvgaSmomtCpkwsli2hdTL2/CTbDdfMbrPu2Bh0bnXV8m+Ocpmg4aE1VknPVXXmFQfZTFC9R PWak0h/+h2DZD9nlxdlB3siacWe5AV4vzqvcYzk+jA73dFTEaXeEqMMvqPSNej5LLFJg=; Original-Received: from [84.212.220.105] (helo=elva) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mSX7N-0000QZ-UO; Tue, 21 Sep 2021 06:10:57 +0200 Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAAAXNSR0IArs4c6QAAAAZQTFRF 7uvq////b1GyvQAAAAFiS0dEAf8CLd4AAAAJcEhZcwAACxIAAAsSAdLdfvwAAAAHdElNRQflCRUD KAZW8lCLAAAADUlEQVQY02NgGAXUBAABUAABp+LaFgAAAFplWElmTU0AKgAAAAgABQESAAMAAAAB AAEAAAEaAAUAAAABAAAASgEbAAUAAAABAAAAUgEoAAMAAAABAAIAAAITAAMAAAABAAEAAAAAAAAA AABIAAAAAQAAAEgAAAABH1L3NAAAACV0RVh0ZGF0ZTpjcmVhdGUAMjAyMS0wOS0yMVQwMzo0MDow NiswMDowMNFgtM8AAAAldEVYdGRhdGU6bW9kaWZ5ADIwMjEtMDktMjFUMDM6NDA6MDYrMDA6MDCg PQxzAAAAF3RFWHRleGlmOllDYkNyUG9zaXRpb25pbmcAMawPgGMAAAA4dEVYdGljYzpjb3B5cmln aHQAQ29weXJpZ2h0IChjKSAxOTk4IEhld2xldHQtUGFja2FyZCBDb21wYW55+Vd5NwAAACF0RVh0 aWNjOmRlc2NyaXB0aW9uAHNSR0IgSUVDNjE5NjYtMi4xV63aRwAAACZ0RVh0aWNjOm1hbnVmYWN0 dXJlcgBJRUMgaHR0cDovL3d3dy5pZWMuY2gcfwBMAAAAN3RFWHRpY2M6bW9kZWwASUVDIDYxOTY2 LTIuMSBEZWZhdWx0IFJHQiBjb2xvdXIgc3BhY2UgLSBzUkdCRFNIqQAAAABJRU5ErkJggg== X-Now-Playing: Foxtrott's _Modern Love_: "Chant of the Ever Circling Skeletal Family" In-Reply-To: <877dfavmzw.fsf@posteo.net> (Philip Kaludercic's message of "Mon, 20 Sep 2021 23:35:47 +0000") Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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:275190 Archived-At: Philip Kaludercic writes: > So before I continue working on this, I would like to ask if there is > any interest/there are any objections to providing such a library? In the past, it was frowned upon to create these shims because of "pollution" and "cleanliness" and all that sort of stuff -- when something breaks, the question becomes "which version of `when-let*' was that, then?" which most users aren't able to answer. On a practical level, I think it's likely that people are using the presence of certain features as a proxy for Emacs versions, and defining a function like this might break some people's code. (I.e., they're testing for the presence of `when-let*' to see whether they should do something totally unrelated that was introduced in a specific Emacs version, like :extend the face.) That said, it's just so much more practical for package authors to have these compat shim libraries. I naughtily had a gnus-compat.el library in the external Gnus distribution for a decade that did pretty much what you're doing here, and I can't recall anything breaking. So I'm for it. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no