From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 10.200.56.25 with SMTP id q25mr11331481qtb.77.1503381779176; Mon, 21 Aug 2017 23:02:59 -0700 (PDT) X-Received: by 10.36.43.198 with SMTP id h189mr435546ita.4.1503381779138; Mon, 21 Aug 2017 23:02:59 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!nntp-feed.chiark.greenend.org.uk!ewrotcd!news.etla.org!feeder.erje.net!2.us.feeder.erje.net!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!border2.nntp.dca1.giganews.com!nntp.giganews.com!v29no2523548qtv.0!news-out.google.com!c139ni2407itb.0!nntp.google.com!x187no271744ite.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Mon, 21 Aug 2017 23:02:58 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=2601:191:8303:2100:4dbf:79ac:dfdd:9f98; posting-account=fdRd8woAAADTIlxCu9FgvDrUK4wPzvy3 NNTP-Posting-Host: 2601:191:8303:2100:4dbf:79ac:dfdd:9f98 References: <79e06550-67d7-45b3-88f8-b7b3980ecb20@googlegroups.com> <9d4bc8aa-cc44-4c30-8385-af0d29d49b36@googlegroups.com> <1395655516.524005222.638450.laguest-archeia.com@nntp.aioe.org> <4527d955-a6fe-4782-beea-e59c3bb69f21@googlegroups.com> <22c5d2f4-6b96-4474-936c-024fdbed6ac7@googlegroups.com> <3f04ecdc-2672-4051-948f-37ce5446dbac@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <0950da12-a618-441a-95bb-9ad4c08ce6d9@googlegroups.com> Subject: Re: Community Input for the Maintenance and Revision of the Ada Programming Language From: Robert Eachus Injection-Date: Tue, 22 Aug 2017 06:02:59 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Xref: news.eternal-september.org comp.lang.ada:47783 Date: 2017-08-21T23:02:58-07:00 List-Id: On Saturday, August 19, 2017 at 1:09:07 PM UTC-4, Dmitry A. Kazakov wrote: =20 > In order to have this mess typed, and you correctly said that it must=20 > be, you will need *separate* types for: >=20 > - Node / device > - Absolute directory > - Relative directory > - Simple name > - MIME type (extension) > - File version / change number (e.g. for VMS or source control systems) > - File name (simple name, MIME type, version number) > - Directory name (node, directory) > - File path (node, directory, name, MIME type, version number) >=20 > If Open were defined on file path, then a partial name would not match,= =20 > unless converted implicitly, e.g. by adding directory name. That way lies madness. What you want is a tagged type URL. The base type = could have conversions to/from string, with child types like local_path, et= c., which could be used to generate a (full) URL from a local file name. I= s there any reason why Ada 2020 Text_IO should not have a Open that takes a= URL as an argument?