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=-0.3 required=5.0 tests=BAYES_00, REPLYTO_WITHOUT_TO_CC autolearn=no 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: "G.B." Newsgroups: comp.lang.ada Subject: Re: Ada 2012 Constraints (WRT an Ada IR) Date: Mon, 12 Dec 2016 19:55:32 +0100 Organization: A noiseless patient Spider Message-ID: References: <47366b42-c0a3-41bf-a44a-5241c109d60f@googlegroups.com> Reply-To: nonlegitur@notmyhomepage.de Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Mon, 12 Dec 2016 18:54:09 -0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="2bd15e9ad73c93509b7db25068f7dfe4"; logging-data="14228"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+aZunJ3/HBMV7irw9NNOf1AKK3Ytbp26s=" User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 In-Reply-To: Cancel-Lock: sha1:hxH6NPb4JD9lYRXclVwrVNSEu+w= Xref: news.eternal-september.org comp.lang.ada:32762 Date: 2016-12-12T19:55:32+01:00 List-Id: On 12/12/2016 18:39, Dmitry A. Kazakov wrote: > As I said before it must be moved to the post-condition, Storage_Error, or whatever raised upon stack overflow included. Could you please show a good Post aspect for function Plus_Too (A, B: Standard.Integer) return Standard.Integer is begin return A + B; end Plus_Too; > >> My answer: >> The declaration should include that they must be related by A > B. > > They are not. Only when the client has violated the contract about which the programmer has never been told... A shrug does not work, for any agreed-upon premise in a contract.