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: 103376,901038687c38f61c X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news1.google.com!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread3.news.pas.earthlink.net.POSTED!a6202946!not-for-mail From: Jeffrey Carter Organization: jrcarter commercial-at acm [period | full stop] org User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Idiom for a class and an object in Ada References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Date: Wed, 20 Oct 2004 01:10:53 GMT NNTP-Posting-Host: 63.184.9.73 X-Complaints-To: abuse@earthlink.net X-Trace: newsread3.news.pas.earthlink.net 1098234653 63.184.9.73 (Tue, 19 Oct 2004 18:10:53 PDT) NNTP-Posting-Date: Tue, 19 Oct 2004 18:10:53 PDT Xref: g2news1.google.com comp.lang.ada:5479 Date: 2004-10-20T01:10:53+00:00 List-Id: Matthew Heaney wrote: > Too much code bloat. There's no reason AD_Converter needs to be a > generic, if the objects of that type are known apriori: Perhaps. The Ada idiom for a singleton is package-as-object; the obvious extension from "single" to "a few" is a generic package. However, a discriminated type such as you described may well be a viable alternative. It's the idea that you need a family of tagged types, type extension, and all that entails for something this simple. I would expect, in any case, that these things are the low-level interface to the devices, and that the application would use higher-level interfaces that map the range of values the device deals with to information meaningful to the application. -- Jeff Carter "Spam! Spam! Spam! Spam! Spam! Spam! Spam! Spam!" Monty Python's Flying Circus 53