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 X-Received: by 2002:a24:6ed2:: with SMTP id w201-v6mr7632577itc.4.1525452460678; Fri, 04 May 2018 09:47:40 -0700 (PDT) X-Received: by 2002:a9d:830:: with SMTP id 45-v6mr1933697oty.7.1525452460547; Fri, 04 May 2018 09:47:40 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!news.uzoreto.com!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!v8-v6no1606630itc.0!news-out.google.com!15-v6ni1768itg.0!nntp.google.com!u74-v6no496201itb.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Fri, 4 May 2018 09:47:40 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=47.185.233.194; posting-account=zwxLlwoAAAChLBU7oraRzNDnqQYkYbpo NNTP-Posting-Host: 47.185.233.194 References: <1c73f159-eae4-4ae7-a348-03964b007197@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <94bd81e5-2ef5-41a2-973a-72f2ba4cecd1@googlegroups.com> Subject: =?UTF-8?B?UmU6IEhvdyB0byBnZXQgQWRhIHRvIOKAnGNyb3NzIHRoZSBjaGFzbeKAnT8=?= From: "Dan'l Miller" Injection-Date: Fri, 04 May 2018 16:47:40 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Xref: reader02.eternal-september.org comp.lang.ada:51976 Date: 2018-05-04T09:47:40-07:00 List-Id: On Friday, May 4, 2018 at 11:13:09 AM UTC-5, guyclaud...@gmail.com wrote: > Since this topic has somewhat turn into a Ada vs Rust/Haskell/whatever, c= ould some experts show a piece > of Ada code where the "borrower-checker" would more check/security ? Or a= re the paradigms too different > to show a snippet close enough to (or IN ) Ada so that I can understand ? The Ada source code that you are seeking (and corresponding Rust code) woul= d demonstrate some form of utilization of the access keyword whose referent= the borrow checker would track as either 1) mutably singly owned or 2) imm= utable shared. As soon as the access keyword appears in source code, someo= ne on c.l.a will say that a better memory-management design would be to eit= her eliminate access altogether or bury it with a library. Although I woul= d applaud anyone who takes the time to craft such lucid demonstration Ada s= ource code (as it would be illuminating to see variations on the theme), as= soon as someone posts even a single line of Ada source code, there will be= many replies that will conform to the 2nd sentence of this paragraph. The= main moral of the story (despite the quantity of the requisite back & fort= h replies) will tend to be the 1st sentence in this paragraph. Ultimately it comes down to: Rust's borrow checker in Ada would embrace ac= cesses as much as references in Rust and smart-pointers in modern C++, but = the trend of modern Ada is to de-emphasize accesses. Ada-the-language and = Ada-the-de-facto-culture are diverging over time.