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?Linus_Bj=C3=B6rnstam?= Newsgroups: gmane.lisp.guile.user Subject: Re: Meaning of <=> in the context of procedures Date: Wed, 02 Jun 2021 18:21:39 +0200 Message-ID: <5cee767e-f4a2-4dd9-ad96-203d9feba55b@www.fastmail.com> References: <94db6b16-39d5-49ea-bc0a-f88f285fb4d9@www.fastmail.com> Mime-Version: 1.0 Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="6967"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Cyrus-JMAP/3.5.0-alpha0-519-g27a961944e-fm-20210531.001-g27a96194 To: "Mortimer Cladwell" , guile-user@gnu.org Original-X-From: guile-user-bounces+guile-user=m.gmane-mx.org@gnu.org Wed Jun 02 18:22:51 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 1loTdr-0001Wv-B0 for guile-user@m.gmane-mx.org; 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Wed, 2 Jun 2021 12:22:02 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface In-Reply-To: <94db6b16-39d5-49ea-bc0a-f88f285fb4d9@www.fastmail.com> Received-SPF: pass client-ip=66.111.4.26; envelope-from=linus.internet@fastmail.se; helo=out2-smtp.messagingengine.com 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_PASS=-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:17564 Archived-At: To reply to myself: it is an exported identifier that is used in a defin= e-json-mapping. It is good form for macros to export all its auxiliary s= yntax.=20 --=20 Linus Bj=C3=B6rnstam On Wed, 2 Jun 2021, at 18:12, Linus Bj=C3=B6rnstam wrote: > It is a trick to allow using the symbol '<=3D> as an identifier instea= d=20 > of quoting it. Nothing special. Guile-json probably uses it somehow. >=20 > If it is used as auxiliary syntax in a macro, it is probably exported=20= > so guile can warn that it is being shadowed instead of (or rather: in=20= > addition to) producing bad error messages. >=20 > --=20 > Linus Bj=C3=B6rnstam >=20 > On Wed, 2 Jun 2021, at 16:06, Mortimer Cladwell wrote: > > Hi, > > What does <=3D> mean/do? > > It can be found in guile-json in the (json record) module, line 33: > >=20 > > 33 #:export (<=3D> define-json-mapping define-json-type)) > >=20 > > Not mentioned in the entire Guile manual. Happens to be defined on l= ine 36 > > of the module: > >=20 > > 36 (define <=3D> '<=3D>) > >=20 > > I didn't find that very helpful :) > > Thanks > > Mortimer > >=20 >=20 >=20