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 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: a07f3367d7,73cb216d191f0fef X-Google-Attributes: gida07f3367d7,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII X-Received: by 10.224.185.79 with SMTP id cn15mr10308446qab.4.1364344576068; Tue, 26 Mar 2013 17:36:16 -0700 (PDT) Path: k8ni27022qas.0!nntp.google.com!border1.nntp.dca.giganews.com!border4.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!newsgate.cuhk.edu.hk!goblin1!goblin.stu.neva.ru!eternal-september.org!feeder.eternal-september.org!mx05.eternal-september.org!.POSTED!not-for-mail From: "J-P. Rosen" Newsgroups: comp.lang.ada Subject: Re: Is this expected behavior or not Date: Fri, 22 Mar 2013 11:23:09 +0100 Organization: A noiseless patient Spider Message-ID: References: <7jct0noryc1v.1rnj5kkzx6m35.dlg@40tude.net> <5141c499$0$6642$9b4e6d93@newsspool2.arcor-online.net> <18r2kop6fyozu.tctrjnghfxqs.dlg@40tude.net> <1wv3p3nrtejfk$.bwebhg9agt0l.dlg@40tude.net> <514874d3$0$6628$9b4e6d93@newsspool2.arcor-online.net> <1o60gooo8xvba$.1ei9cebb07zek$.dlg@40tude.net> <514897bd$0$6641$9b4e6d93@newsspool2.arcor-online.net> <1oqwvcemo8dha$.hevuedtz8eze.dlg@40tude.net> <14aijp8ckzahf$.1ilfm1nw6qgyt$.dlg@40tude.net> <1xg9wka6slgit.1q0leacagdeuv.dlg@40tude.net> Mime-Version: 1.0 Injection-Date: Fri, 22 Mar 2013 10:21:09 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="da91dd38436bbbf5b448e21e8f29aa94"; logging-data="3562"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+oR6/5bJBBclla1OTq90Ib" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130307 Thunderbird/17.0.4 In-Reply-To: <1xg9wka6slgit.1q0leacagdeuv.dlg@40tude.net> Cancel-Lock: sha1:Ggszs0xLsbmowibaRcIfNX4Pd90= X-Enigmail-Version: 1.5.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Date: 2013-03-22T11:23:09+01:00 List-Id: Le 20/03/2013 14:21, Dmitry A. Kazakov a �crit : > See, same operation applied to same value of same type gives different > result. > > This is called UNTYPED. No, it is not the operation that gives different result, it's the assignment of a value that is incompatible with the variable's constraint that raises C_E. >>> No, subtyping is a relation between two types, denoted as T<:S. >> In standard OO speak yes, but that is NOT the meaning in Ada. > > The definition is independent on any language. I don't redefine the meaning > of Ada-subtype. I translate Ada's definition into the terms of ADT. In > these terms Ada-subtype is a proper type. > The theory of ADT has no notion of subtypes (Ada definition). Therefore, you can't translate Ada's subtypes into the terms of ADT. You insist on subtypes being types in a desperate effort to map them to ADT, but sorry, it is not possible. They are different. -- J-P. Rosen Adalog 2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00 http://www.adalog.fr