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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 10:10:07 +0200
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On Wed, 9 Jun 2010 00:50:17 -0700 (PDT), Maciej Sobczak wrote:

> No. The STL classes have no virtual destructors, because they also
> have no virtual functions and as such it makes absolutely no sense to
> derive from them.
> 
> In other words, they are not intended for polymorphic use.

No, they are for parametrically polymorphic use.

Templates -> parametric (static) polymorphism
Virtual functions -> dynamic polymorphism
[ Overloading -> ad-hoc (static) polymorphism ]
 
> Polymorphism
> just makes sense for IOStreams and it just does not for containers.

Polymorphism is the essence of generic programming = programming in terms
of sets of types. That is what STL is all about, per fact and per intent
too (see Stepanov's interview).

>> Reading the rest of you post I wonder if C++ has given up on being an �
>> object orientated language?
> 
> It has not given up anything, as the OO was never the focus. C++ is a
> multi-paradigm language, like Ada. It supports OO but does not force
> it.

I am tempted to re-phrase a saying that multiple opinions on the same issue
(paradigms?) manifests freedom when in a society and schizophrenia when in
someone's head (language?).

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