From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?Q?Ludovic_Court=C3=A8s?= Newsgroups: gmane.lisp.guile.user Subject: Re: Syntax locations are ambiguous: can we track source 'offset' and 'length'? Date: Wed, 04 Aug 2021 14:05:59 +0200 Message-ID: <87v94lpg7s.fsf@gnu.org> References: <771a6e88782e288143be269b14751b761523e4c1.camel@planete-kraus.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7744"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) To: guile-user@gnu.org Cancel-Lock: sha1:Ph3fEuXt011rFYrxQY5H11RLdhM= Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Wed Aug 04 14:08:58 2021 Return-path: Envelope-to: guile-user@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 1mBFhi-0001q9-HL for guile-user@m.gmane-mx.org; Wed, 04 Aug 2021 14:08:58 +0200 Original-Received: from localhost ([::1]:46112 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mBFhh-00038M-Ee for guile-user@m.gmane-mx.org; Wed, 04 Aug 2021 08:08:57 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:59814) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBFf3-0000RG-B8 for guile-user@gnu.org; Wed, 04 Aug 2021 08:06:13 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:45814) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBFf1-0006On-NW for guile-user@gnu.org; Wed, 04 Aug 2021 08:06:13 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mBFez-0008zz-18 for guile-user@gnu.org; Wed, 04 Aug 2021 14:06:09 +0200 X-Injected-Via-Gmane: http://gmane.org/ X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 17 Thermidor an 229 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Received-SPF: pass client-ip=116.202.254.214; envelope-from=guile-user@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, NICE_REPLY_C=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Original-Sender: "guile-user" Xref: news.gmane.io gmane.lisp.guile.user:17669 Archived-At: Hi Vivien, Vivien Kraus via General Guile related discussions skribis: > I am trying to use the guile reader to read scheme comments, in > addition to the syntax elements. I know with syntax-source where a > syntax object starts, and I can know where it ends by using a spying > soft port and re-reading it. However, the #\return ambiguity makes all > my efforts pointless. As you know, ‘read-syntax’ appeared in 3.0.7, so it’s brand new and we could certainly extend (ice-9 read) with more features, including reading comments. In the meantime, I needed the ability to read comments in Guix, including with Guile < 3.0.7, so I hacked up this thing: https://git.savannah.gnu.org/cgit/guix.git/tree/guix/scripts/style.scm?h=core-updates&id=8419221620191d2988c22f6e7811d9ce1e0837bf#n50 It can read and write while preserving comments. Again, we could/should probably integrate that functionality in (ice-9 read) eventually, it shouldn’t be too hard. Thanks, Ludo’.