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=unavailable autolearn_force=no version=3.4.4 Path: buffer1.nntp.dca1.giganews.com!border1.nntp.dca1.giganews.com!border2.nntp.dca1.giganews.com!nntp.giganews.com!newspeer1.nac.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "J-P. Rosen" Newsgroups: comp.lang.ada Subject: Re: container cursor type cannot be tagged Date: Fri, 29 Aug 2014 09:59:03 +0200 Organization: A noiseless patient Spider Message-ID: References: <85ppfkxvwg.fsf@stephe-leake.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 29 Aug 2014 07:59:00 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="214e2226c9a2cb4f71713357be0d6925"; logging-data="17554"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX195j4j8J9eO6vCn99PITlcU" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 In-Reply-To: Cancel-Lock: sha1:Rw+Vhk97FTS8kuxx6+7AsCE/hlc= Xref: number.nntp.dca.giganews.com comp.lang.ada:188725 Date: 2014-08-29T09:59:03+02:00 List-Id: Le 29/08/2014 09:28, Dmitry A. Kazakov a écrit : > That is another of multiple reasons why. Cursor tend to become a full class > with descendants and primitive operations which ends up in multiple > dispatch, for whatever reason not available. An index almost always can be > a "final" type which makes everything a lot easier. Could you elaborate on what (in your view) is the difference between a cursor and an index? -- 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