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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Is this expected behavior or not
Date: Tue, 19 Mar 2013 09:53:51 +0100
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Date: 2013-03-19T09:53:51+01:00
List-Id: <comp.lang.ada>

On Mon, 18 Mar 2013 17:38:34 -0700 (PDT), Shark8 wrote:

> On Sunday, March 17, 2013 3:36:19 AM UTC-6, Dmitry A. Kazakov wrote:
>> On Sat, 16 Mar 2013 14:51:58 -0700 (PDT), Shark8 wrote:
>> 
>>> I think it's rather a shame that the compile-time computation aspect of
>>> generics is not emphasized a bit more
>> 
>> You need no generics in order to compute something statically. Yes Ada
>> could be much better with an ability to declare a function static or
>> conditionally static.
> 
> You misunderstand me; I wasn't saying that generics were required for
> compile-time computation, but that their use in compile-time computation
> is an interesting topic.

Surely it is, especially for static checks/constraints defined by the user
as it would be necessary for dimensioned arithmetic, matrix calculus etc.

> (For example you could make a solar-system
> simulator by making 'orbit' a generic with the parameters cooresponding to
> Kepler's laws of motion.)

Again, you don't need generics that. If you want "laws" be parameter bundle
them into an interface. Generics/templates/preprocessor have no other
purpose than to cover work around deficiencies of the language type system,
premature optimization, lack of abstraction means.

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