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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Ada Successor Language
Date: Fri, 22 Jun 2018 18:02:08 +0200
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Xref: reader02.eternal-september.org comp.lang.ada:53255
Date: 2018-06-22T18:02:08+02:00
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On 2018-06-22 13:13, Alejandro R. Mosteo wrote:
> On 20/06/2018 09:33, Dmitry A. Kazakov wrote:
> 
>> I you meant rather *types*, then as I said earlier, polymorphism can 
>> be achieved by different means and ad-hoc polymorphism offered by 
>> generics the worst possible way. My point was to use dynamic 
>> polymorphism instead.
> 
> Is something interfaces-like what you mean here?

Sure. Especially when ad-hoc superclasses are needed. There is no way to 
foresee and declare all possible interfaces of a type. One should be 
able to declare a common interface ancestor later on.

> I admit I still have 
> sometimes the doubt of doing things the generic vs interface way.

Generics are automatically at disadvantage, even performance-wise, 
because in all contexts where types are statically known there is no 
dispatch in Ada. Since generics are always static in all comparable 
cases dynamically polymorphic calls are statically resolved.

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