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From: Ludovic Brenta <ludovic@ludovic-brenta.org>
Newsgroups: comp.lang.ada
Subject: Re: Preventing type extensions
Date: Thu, 23 Sep 2010 22:28:09 +0200
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Pascal Obry writes on comp.lang.ada:
> Ludovic,
>
>> And people not knowing Ada and thinking that the only OO language was
>> C++.  I totally agree with Jean-Pierre that Ada has made a very
>> important contribution to OO technology in distinguishing class-wide
>> from specific types; 
>
> Well this was part of Smalltalk since the beginning. Not sure Ada has
> invented anything there :)

I do not remember anything in Smalltalk resembling class-wide types;
could you please send me an URL? I'm curious.

I do remember about class objects (objects representing classes, with
methods such as "new" which create instances of the class).  Java
introspection similarly has class objects but not class-wide types.

-- 
Ludovic Brenta.