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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: Sun, 6 Jun 2010 13:03:26 +0200
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Date: 2010-06-06T13:03:25+02:00
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On Sun, 06 Jun 2010 11:13:46 +0100, Simon Wright wrote:

> "Martin Krischik" <krischik@users.sourceforge.net> writes:
> 
>> One should just
>> make a habit of defining classes like this:
>>
>> virtual Base
>>   {
>>   public:
>>     virtual ~Base ()
>>       {
>>       �K
>>       }
>>   }
>>
>> And suddenly all your virtual inheritance needs work flawlessly.
> 
> I suppose there must be some cost to doing this? or the language
> definition would require it to be always so.

Yes, in C++. No, in Ada, if Ada supported by-value classes. Since in Ada T
/= T'Class you need not put as in C++ the type tag into the object. You
could put the tag only into T'Class and leave T as is. You would lose view
conversions T <-> T'Class, but they don't have sense for by-value objects
anyway.

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