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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: If not Ada, what else...
Date: Tue, 21 Jul 2015 22:06:54 +0100
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Date: 2015-07-21T22:06:54+01:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Tue, 21 Jul 2015 19:51:29 +0100, Simon Wright wrote:

>>    abstract class type A is
>>       procedure P1 (This : in out T) is abstract;
>>    end A;
>> 
>>    class type T is new A with
>>       overriding procedure P1 (This : in out A);
>>       not overriding function F1 (This : A) return Integer;
>>    private
>>       V : Integer;
>>    end T;
>> 
>> etc etc; not a million miles from Ada as we know it.
>
> Conceptually it is. Operations do not belong to types.

Huh?

> Then everybody agreed that the syntax of protected objects was a
> mistake.

I don't remember agreeing

> Why repeating this flawed syntax for classes? It is again about
> fundamentals, privacy is not a type property. It is of a module.

Well, as far as I can see protected types, tasks and (in this
not-to-be-taken-seriously proposal) classes are modules, in a way.