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: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Discriminant of a limited type object Date: Fri, 2 Mar 2018 11:30:33 +0100 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: MyFhHs417jM9AgzRpXn7yg.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 X-Notice: Filtered by postfilter v. 0.8.3 Content-Language: en-US Xref: reader02.eternal-september.org comp.lang.ada:50792 Date: 2018-03-02T11:30:33+01:00 List-Id: On 01/03/2018 23:00, Randy Brukardt wrote: > It's not clear that there is much use for streaming of limited objects, as > streaming is very much like assignment (it makes a copy of the object). One > would expect that if assignment is a problem, so would streaming be a > problem. Assignment is a problem, construction is not. If streaming is a way to create a limited object that is OK, e.g. saving worker task state and restarting the task later in that state. > I suppose there are some cases where controlled assignment isn't a > good solution (I haven't seen one personally, but everything happens > eventually...), but it seems like a niche need at best. Controlled assignment? It is all OK if doubly-dispatching, otherwise it is a bug on many occasions. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de