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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Ada requires too much typing!
Newsgroups: comp.lang.ada
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Date: Wed, 9 Jun 2010 11:24:16 +0200
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Date: 2010-06-09T11:23:51+02:00
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On Wed, 9 Jun 2010 01:43:56 -0700 (PDT), Maciej Sobczak wrote:

> On 9 Cze, 10:10, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
> wrote:
> 
>>> In other words, they are not intended for polymorphic use.
>>
>> No, they are for parametrically polymorphic use.
> 
> By "polymorphism" I meant the parametrisation based on dynamic
> dispatch,

This is a specific form of polymorphism.

> also known as object-orientation.

There are different opinions on whether OO is limited to dynamic
polymorphism.

> Note, for example, that containers in C++ have no common base class/
> interface. In Ada this is similar.

There is a common base, which is just not explicit. This is one of the
weaknesses of parametric polymorphism that it does not provide any
substitute for the class (= set of types) embedded in the language. E.g.
you cannot name "all instances of a generic thing."

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