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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: ANN: Ada 2005 Math Extensions, 20100810 release
Date: Fri, 13 Aug 2010 22:17:53 +0200
Organization: Ada At Home
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Date: 2010-08-13T22:17:53+02:00
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Le Fri, 13 Aug 2010 21:50:07 +0200, Simon Wright <simon@pushface.org> a =
 =

=C3=A9crit:
> I've more often come across the latter.
>
> Could consider
>
> generic
>    type Formal_Foo is ...
> package Generic_S is
>    subtype Foo is Formal_Foo;
>
The trouble with this one, is that it move the case to the client side..=
.  =

I would not like to generic instantiations =E2=80=9Cobfuscated=E2=80=9D =
with all of those  =

Formal_Foo (I always use named parameter associations... especially with=
  =

generic instantiations).

The Dmitry way, which is also the one I use, end to be less intrusive, a=
s  =

the client of the generic package is less likely to have to spell this  =

somewhere (except if it/he/she has to use a formal parameter of a given =
 =

instantiated package to instantiate another).


-- =

There is even better than a pragma Assert: a SPARK --# check.
--# check C and WhoKnowWhat and YouKnowWho;
--# assert Ada;
--  i.e. forget about previous premises which leads to conclusion
--  and start with new conclusion as premise.