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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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Newsgroups: comp.lang.ada
Subject: Re: GNAT packages in Linux distributions
Date: Tue, 25 May 2010 22:45:31 +0200
Organization: Ada At Home
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Date: 2010-05-25T22:45:31+02:00
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Le Wed, 12 May 2010 19:24:11 +0200, Dmitry A. Kazakov  =

<mailbox@dmitry-kazakov.de> a =C3=A9crit:
> Yes, it is better but that is not the point. Which is there is no
> substantial difference between Eiffel precondition and C's if statemen=
t
> beyond syntax sugar, and that if-statement is less misleading.
There is a major difference : Eiffel's pre/cond on methods are inherited=
  =

by derived class. With C, or even with Ada' pragma Assert, this have to =
be  =

done manually.

Side note: I'm not talking about pre/cond in Ada 2012/2015, which will b=
e  =

closer to that of Eiffel. However, as SPARK already has this and do it  =

better from my point of view (because of static checking and proofs), I =
am  =

not waiting for Ada 2012/2015 for that.

-- =

There is even better than a pragma Assert: a SPARK --# check.