From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: "Dr. Arne Babenhauserheide" Newsgroups: gmane.lisp.guile.user Subject: Re: Guix records Date: Wed, 10 Feb 2021 02:02:23 +0100 Message-ID: <87o8gs68gw.fsf@web.de> References: <87lfc2e9vn.fsf@clara> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16643"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.4.15; emacs 27.1 Cc: guile-user@gnu.org To: Taylan Kammer Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Wed Feb 10 02:03:22 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 1l9duc-0004Ep-CW for guile-user@m.gmane-mx.org; Wed, 10 Feb 2021 02:03:22 +0100 Original-Received: from localhost ([::1]:37760 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l9dub-0005fe-EV for guile-user@m.gmane-mx.org; Tue, 09 Feb 2021 20:03:21 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39664) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l9duB-0005fO-Ej for guile-user@gnu.org; Tue, 09 Feb 2021 20:02:55 -0500 Original-Received: from mout.web.de ([212.227.15.3]:41667) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l9du9-00041v-Ju for guile-user@gnu.org; Tue, 09 Feb 2021 20:02:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1612918954; bh=jOPOI1HSufX3mN2sRuS8Bp+WfcmD/YBBBe+tYgQCaiA=; h=X-UI-Sender-Class:References:From:To:Cc:Subject:In-reply-to:Date; b=icnPbhbgXE7bjw/hTTHLFHPsiv3OMxTWOu7uz926ia8aYB4MP+Ho/05EC8Hnbr/ST MHkr2KgYNkRCbxpFIRVo0CyZN/kNikgktNkwsCr3eJ0SuZASVoZovbEu7Wui6aQTez d5NxTGXcW1wu18qUmLEwgdbhM+fQyZwaxq4JeatA= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Original-Received: from fluss ([84.149.93.44]) by smtp.web.de (mrweb001 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MYvmV-1lM2NV3PH9-00Vekz; Wed, 10 Feb 2021 02:02:34 +0100 In-reply-to: X-Provags-ID: V03:K1:moFZ7ylDMtvQZ2fzudUdRE9OqAHD7ID8BIUgM9nVhBom/aE7pmQ lOugNyBg0XNkYqFndki9h/Mo3jQfMLDLbIBO/CHERObKvpfN+0log77/SZLLH/tal5fWyE5 XhCMJe4a0RaCF/YtU+BCNnOc/yWq7Fa5izV74E1GYkKgC/rQuLnWgpTb0bRX72ukuPWMdjJ KycmscoAUGMc72wszJwOA== X-UI-Out-Filterresults: notjunk:1;V03:K0:otURrnSvqbs=:99W/HVimDSZw/ETcWcpnWI 203vGVs3TRQtBpFlypB0K1MG+cQOngYv3XmBGxN0zIYlS3gNGsC++JBsg2xjsxpQuh9ORVf08 2YxxFSRoV0T06bOX3UY+f4gVMGugbXaxq2kUwQevI0w26fbQ8A7QE7lAEMCPK+K16w0M23lBi YRsdDlkqXLjb9vzH4Op4B1u+Uz+ZIpzIdjD82vkFn28Zv1TxyU8y3zhXyJLWbiDP69o1MlmY1 i6s4+FCmWxTGnhMRWyh9b/l2axnnFh8lRvC4fo2NUn57eACp58L6fzxmMwd7wwZYGydK+Hm87 WFZDt4A3pdNjmung0rrfe4hnpUFOrxgZm/1XyzyU9N3oLy1wSTTm2cQs3nN+oG+AUqLmn9tig zYFg+qoBrgZaPNmsgjQ8FEIIu1JAlajUvPIdf8EfCRo1ifj7aDZMGk2Cb9FSDz8CGIssO+I61 dw2XItyRXDccNcrKesZ9+jY+eEHwtqe6k1fw2yic0krfXcjmsZ/XwqwhzMQIzM7g7weiU34gT adAzTS7XzFjt6fxFFM2Du0fzciW3giZJxbC4fC9cXwIiOBjyhCKNdvfqwRbVEaSIZRVMVIVFF NFvhQqrt000T5qYqFwooB44Kwx67ThmGDKa2fOM/4iJeKhBwKIb/HFDK7d631cP05bXzh7Jnz qIIA8YQctsbUBZFoG27SkZbjYdGS81myC+ABGDKozMhNFmdPvfyfYeF8cy/D4QoBs1Mi1TlT3 EdxzAt3wqDwJdNEYHGkgURKNwtLefVutAZt4832eNObsFFu4Hul7Laa3kIS4Uhsq8gXK3ku0 Received-SPF: pass client-ip=212.227.15.3; envelope-from=arne_bab@web.de; helo=mout.web.de 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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:17236 Archived-At: --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Taylan Kammer writes: > The most feature-rich record system supported by Guile is probably the > R6RS record system, which is available through the modules: > > (rnrs records syntactic (6)) > (rnrs records procedural (6)) > (rnrs records inspection (6)) > Here's a super brief example usage of R6RS records, demonstrating that > field accessors are defined implicitly, but constructors still use an=20 > unnamed sequence of arguments to assign fields: > > (import (rnrs records syntactic (6))) ; must use 'import' for R6RS > > (define-record-type (cat make-cat cat?) (fields name age color)) > > (define garfield (make-cat "Garfield" 42 'orange)) > > (cat-color garfield) ;=3D> orange I did not know about that shorthand =E2=80=94 thank you! I always did this: (import (srfi srfi-9)) ; define-record-type (define-record-type (make-cat name age color) cat? (name cat-name) (age cat-age) (color cat-color)) Compared to that the syntactic form you showed is much nicer. Is there a difference in efficiency or such? Best wishes, Arne =2D-=20 Unpolitisch sein hei=C3=9Ft politisch sein ohne es zu merken --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQJEBAEBCAAuFiEE801qEjXQSQPNItXAE++NRSQDw+sFAmAjMKIQHGFybmVfYmFi QHdlYi5kZQAKCRAT741FJAPD63UAEACl3yxgGCmpq5E/abvn2W/Uulw9YNRwangv Z92g5dq472g0yBi06LIb9XIqiJcL3yIdqQHC/0BTs4VPQu4x9U2A+NvwV3w2EJuq d45b4yPGY3o6rwOxyKoa/LNQvkWLwKimXTj2Yjv0qrtTQ7JSx6floHo0rer3XAFG SecMZLo/TbwlpD2YoU75PCS5HjMMTRMStDNLDDMY6mtUrnQeqLmHYDu3TDrt8h/E Y3MwPmlpaaZ1jYq2x2m5C7O389HzeHoybtRxyWqkVS5OeGNuzS+/28O7ZRH/q4ml 9y7aF90h9BYlfHcHB8WRk76J9xNp4hNlYtOQMqxZy8oBa3GJ4xXjKonK/pvTvEsR TumlwW/IIaq7PFMzrZs4GiKALxpcAuNUPskmbifYovCga2gyWKpE9w70jSKKCuGa PM883awLUWrjuQFaOvxCOFElwYOtCTdZixZHWQ/275tcTpES7e3MIeiNgtz7E7Lp ngCo53KCgiODj7RQIyGvd3IEF4943M1zEsPLwzcCnBNRieFdeL2NGH6CK5PUDTkv ba0lBkbyMdZlloT9MrYT5+m8WoI6/Q38tqDtlqidTCMUrKae76c13665b75pjdj5 iG+rjnH6NBU+Kmzg0XhExdTPSol1fNsNRpzn3yYYTe5+fLeRTDapC1S3oObDg7fu G/+sWshf1IjEBAEBCAAuFiEE3Si95tmHXKvOSosd3M8NswvBBUgFAmAjMKkQHGFy bmVfYmFiQHdlYi5kZQAKCRDczw2zC8EFSFGoA/9SIEDDgMJuEYIKALnxaUXhaZBi eUGKTPzcq0WiNQmQ+9aujk2vpvI2afXuq1Uo4LQkPPnY/hkXhbSwGZIUaeRCm/Xa bAmh2UavCPUVXIydyy5j7UAFlx7loBOnK1QdrEy08Xc5ZaNiwMSg0GSOm2MGcrk+ 4ycygdtSzmnX/mTQBA== =O/WX -----END PGP SIGNATURE----- --=-=-=--