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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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Newsgroups: comp.lang.ada
Subject: Re: Ada requires too much typing!
Date: Thu, 10 Jun 2010 10:44:02 +0200
Organization: Ada At Home
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Date: 2010-06-10T10:44:02+02:00
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Le Thu, 10 Jun 2010 10:07:17 +0200, Dmitry A. Kazakov  =

<mailbox@dmitry-kazakov.de> a =C3=A9crit:
>> What would become formal parameters, like type parameters ?
>
> Base types, class-wide types.
>
>> Overloading
>> functions returning type derived from that of the ancestor one ? OK. =
So,
>> this will require an original bas type in the root definition which  =

>> could
>> be wide enough to reach actual capabilities of generics. An =E2=80=9C=
ANY=E2=80=9D type
>> (like in QBasic) ?
>
> Nope. The element of a stack is not just any type. It is a copyable ty=
pe
> (the class "private" in terms of Ada generics).
>
>> An abstract base type ? OK. So, now, we will need to be
>> able to declare abstract base type, that is, abstract discrete types,=
  =

>> etc.
>> Is that what's in your mind ?
>
> Yes. These are abstract interfaces to be defined. This is an easy part=
  =

> BTW.
What about =E2=80=9Cnot every thing in the same bag=E2=80=9D philosophy =
? (many others  =

failed in this trap) Moving generics to dynamic polymorphism... would be=
  =

dynamic polymorphism where there was a kind of static polymorphism. And =
 =

this is not the same from the point of view of program proof you like so=
  =

much (me too, I like).

Is there some kind of meta-class in you idea of a new modal ? (generics =
 =

can define new types and thus can initiate new class of types, you will =
 =

meta-class to achieve the same).

-- =

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.