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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: function Is_Open (File : File_Type) return Boolean; :Text_io
Date: Fri, 30 Oct 2015 17:26:25 +0100
Organization: cbb software GmbH
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Date: 2015-10-30T17:26:25+01:00
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On Fri, 30 Oct 2015 15:40:30 +0100, G.B. wrote:

> On 30.10.15 09:39, Dmitry A. Kazakov wrote:
>> you don't pay attention to what [Boolean expressions of
>  > assertions checked] cause (and they surely
>> do) at run-time.
> 
> On the contrary, paying attention to them is part of why
> Assertion_Policy is in the language.

Yes, a part of whatever, except for what the program does...

> I don't want the compiler to be in the way of design.

Surely C would be the best language for this.

> Therefore,
> I accept that not all things expressible formally will be static.
> I don't want hide these formal assumptions for the same reasons.
> That's self-indulgent, then?

Yes, because you sell it yourself as "contracts," as "ways of design," as
anything supposed to convince you having a better program, without taking
care for what actually goes on at run-time!

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de