From: G. B. <nonlegitur@nmhp.invalid>
Subject: Re: "functional" programming in Ada
Date: Thu, 8 Mar 2018 22:49:20 -0000 (UTC)
Date: 2018-03-08T22:49:20+00:00 [thread overview]
Message-ID: <p7selg$ab0$1@dont-email.me> (raw)
In-Reply-To: p7qrun$461$1@gioia.aioe.org
Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
> On 08/03/2018 04:34, Randy Brukardt wrote:
>> The various contracts (preconditions, postconditions, predicates, etc.) all
>> contain some executable code, and it is necessary for callers to be able to
>> understand those contracts. Expression functions help in this, while the
>> bulk of the implementation should remain in the body.
>
> These are not contracts if have any executable code, and more
> importantly, understanding cannot be achieved by exposing
> implementation/code.
>
> P.S. Contracts exist prior the program (programs, actuall) and surely
> prior to any execution of (any implementation of any programs under the
> contract).
>
If there is nothing that ever assigns a value to a contract’s
clause, then there id none. So, in order make it something,
an evaluation of clauses needs to be performed. Somewhere,
somehow. My brain is operating when doing this, or so I hope,
and whenever it does following discipline, then it is executing
a program.
The troublesome idea is to think that the program
and its contract are like “x ε x”, or like recursive types.
next prev parent reply other threads:[~2018-03-08 22:49 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 11:34 "functional" programming in Ada Alejandro R. Mosteo
2018-03-06 13:09 ` Dmitry A. Kazakov
2018-03-06 14:35 ` Alejandro R. Mosteo
2018-03-06 15:08 ` Dmitry A. Kazakov
2018-03-06 16:00 ` Manuel Collado
2018-03-06 16:37 ` Dmitry A. Kazakov
2018-03-06 22:16 ` Manuel Collado
2018-03-07 8:41 ` Dmitry A. Kazakov
2018-03-07 4:46 ` Paul Rubin
2018-03-06 13:29 ` Mehdi Saada
2018-03-06 14:34 ` Alejandro R. Mosteo
2018-03-06 14:36 ` Mehdi Saada
2018-03-06 15:27 ` Alejandro R. Mosteo
2018-03-06 16:26 ` Jeffrey R. Carter
2018-03-06 20:17 ` Randy Brukardt
2018-03-07 14:30 ` Alejandro R. Mosteo
2018-03-06 15:01 ` Dan'l Miller
2018-03-06 15:25 ` Alejandro R. Mosteo
2018-03-07 10:07 ` Maciej Sobczak
2018-03-07 10:52 ` Mehdi Saada
2018-03-07 13:11 ` Pascal Obry
2018-03-07 13:53 ` Dmitry A. Kazakov
2018-03-07 16:13 ` Dan'l Miller
2018-03-12 0:13 ` Robert I. Eachus
2018-03-08 3:34 ` Randy Brukardt
2018-03-08 8:23 ` Dmitry A. Kazakov
2018-03-08 22:49 ` G. B. [this message]
2018-03-09 8:38 ` Dmitry A. Kazakov
2018-03-09 8:40 ` Simon Wright
2018-03-09 13:39 ` Dmitry A. Kazakov
2018-03-07 15:03 ` Alejandro R. Mosteo
2018-03-07 15:16 ` Alejandro R. Mosteo
2018-03-07 20:34 ` Robert A Duff
2018-03-07 22:47 ` Jeffrey R. Carter
2018-03-08 0:26 ` Shark8
2018-03-08 0:45 ` Paul Rubin
2018-03-08 11:07 ` Alejandro R. Mosteo
2018-03-08 18:24 ` G. B.
2018-03-09 14:41 ` Alejandro R. Mosteo
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