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!news.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "J-P. Rosen" Newsgroups: comp.lang.ada Subject: Re: Generators/coroutines in future Ada? Date: Tue, 11 Jul 2017 21:22:58 +0200 Organization: A noiseless patient Spider Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Date: Tue, 11 Jul 2017 19:19:08 -0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="e1dc79fdf8c556e1df960ec138ee501e"; logging-data="12033"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19DkPtBkTQLIYagYqrd7jFQ" User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 In-Reply-To: Content-Language: fr Cancel-Lock: sha1:j9vV0GDiNLUtAS9C+TWCXNi1TDQ= Xref: news.eternal-september.org comp.lang.ada:47360 Date: 2017-07-11T21:22:58+02:00 List-Id: Le 11/07/2017 à 20:36, Victor Porton a écrit : > This state also includes the point of execution (like "We are in the second > loop in its second operator.") > >> This can easily be achieved with a function within a package, where the >> package serves to protect and hide the function's state. > Ada currently has no support to save such (point of execution) states. It has. Make your generator a task, and have an accept when the data is ready, which can be nested as deep as you want in any construct. A task is a perfect abstraction for a thread of control that maintains its own execution state! -- 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