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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Skjbu+I6cfuug5Nqqzw9YbFE62R8Guh2i+ESGOVYCl0=; b=BwMDGWMlYf2z+eqOCvtIfriRCk2bUlAwm97nSbt7hQFa6A09GpJxAjcO39tY8w+LOW vKZiG/LY5DLeP8rrhFlQRi6nj4KR0mH2TC0xhIK3GkUhpATfP3hNo3FijDY6gIG5PsVD v5jMwgQQjv/jRf8Ba//l/wIVfrjBAma5FS942PfndPdCULFfDMGUeRe+GTETZK+22/nW DDlJk9wDeqVQs9c5KspLl2o2RbU/DWp+e/IAUxYoZPIGAw9m5te14ofa6Suhb2zuny3O zZiBtxDAxT5F581V8RmS46u/4d/29qXFYTkwSYmiuzIe4x8OhpIYwHOLAi+qTvPyWWWA sIUA== X-Gm-Message-State: AOAM532v3Lzh8Ifb0jW5YhjsM/Y51+cdX36kLYEKP9Oh0XioZLZ06GTu DvOI5rvcCedDRTgNeF1mByqxRMXcT/Kpx51L/Q== X-Google-Smtp-Source: ABdhPJyyBzeZ2abTZp4FzoU7r8q18VX3Coq/WY+C+FR2FOCzjwksKHVuOj0JyRbwB+SELCl69U0MsbQXwNVIqRb+bEY= X-Received: by 2002:a9d:42e:: with SMTP id 43mr51951263otc.300.1609776487522; Mon, 04 Jan 2021 08:08:07 -0800 (PST) MIME-Version: 1.0 References: <101ac12b-89c3-4803-6fcb-288949a164cd@web.de> In-Reply-To: <101ac12b-89c3-4803-6fcb-288949a164cd@web.de> From: Yawar Amin Date: Mon, 4 Jan 2021 11:07:56 -0500 Message-ID: To: Markus Elfring Cc: Ocaml Mailing List Content-Type: multipart/alternative; boundary="000000000000b4e4ba05b8154be3" Subject: Re: [Caml-list] Determining compatibility for evolving programming interfaces Reply-To: Yawar Amin X-Loop: caml-list@inria.fr X-Sequence: 18331 Errors-To: caml-list-owner@inria.fr Precedence: list Precedence: bulk Sender: caml-list-request@inria.fr X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: Archived-At: --000000000000b4e4ba05b8154be3 Content-Type: text/plain; charset="UTF-8" In general this is very difficult, because of 'module type of' and functors. Almost any change can be a breaking change. If we pretend that those two don't exist then we can make a modest set of guarantees. See https://inbox.ocaml.org/caml-list/71ff7d61-6899-9b05-4c01-3984d47698ca@cea.fr/t/#u for more on this. Regards, Yawar On Sat, Jan 2, 2021 at 2:51 AM Markus Elfring wrote: > Hello, > > OCaml is also an instance of a programming language where type inference > belongs > to core functionality. The usage of various data types will evolve in > several > programming interfaces. > > * How do you think about to check if API revisions are still compatible > there? > > * Which kind of variations can be occasionally tolerated in interface > descriptions? > > > I would appreciate your advices. > > Regards, > Markus > --000000000000b4e4ba05b8154be3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
In general this is very difficult, because of 'module = type of' and functors. Almost any change can be a breaking change. If w= e pretend that those two don't exist then we can make a modest set of g= uarantees. See=C2=A0https://inbox.ocaml.org/caml-list/7= 1ff7d61-6899-9b05-4c01-3984d47698ca@cea.fr/t/#u=C2=A0for more on this.<= div>
Regards,

Yawar

<= div class=3D"gmail_quote">
On Sat, Jan= 2, 2021 at 2:51 AM Markus Elfring <Markus.Elfring@web.de> wrote:
Hello,

OCaml is also an instance of a programming language where type inference be= longs
to core functionality. The usage of various data types will evolve in sever= al
programming interfaces.

* How do you think about to check if API revisions are still compatible the= re?

* Which kind of variations can be occasionally tolerated in interface descr= iptions?


I would appreciate your advices.

Regards,
Markus
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