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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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Newsgroups: comp.lang.ada
Subject: Re: Ada noob here! Is Ada widely used?
Date: Sun, 06 Jun 2010 10:25:11 +0200
Organization: Ada At Home
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Date: 2010-06-06T10:25:11+02:00
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Le Sun, 06 Jun 2010 09:46:28 +0200, Dmitry A. Kazakov  =

<mailbox@dmitry-kazakov.de> a =C3=A9crit:
> =3D exponentially
>
> http://en.wikipedia.org/wiki/Geometric_progression
OK, a quasi-synonym

>> I remember in the past (past year I think), we talked around generics=

>> hierarchy and generic packages as formal parameters. You had warned  =

>> about
>> possible complexity explosion in this area: is this about the same ?
>
> Yep. Once generic always generic. Two generics make four instantiation=
s.
> And the mill starts milling...
This path is not the only one way. There can be instantiations to be use=
d  =

as basic components. Generics does not provide just a way to declare  =

things, this also gives a way to implement, and implementation is an  =

hidden thing (or else private at least). Generic origin of a type can be=
  =

hidden (as an example) ; while obviously, some relationships are then lo=
st.

This can lead into an combinatorial explosion, right ; except =E2=80=9Cc=
an=E2=80=9D is not  =

=E2=80=9Calways=E2=80=9D (while I agree to say it can comes faster than =
supposed, and  =

recurrence/recursivity should be in mind here while designing).

-- =

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.