Re: AuroraUX Combines SunOS with Ada

[Ivan Levashew <octagram@bluebottle.com>]

Ivan Levashew wrote:

> First of all, there is a field for improvements here. Code generators 
> might create typed views on loosy structures. And the component model is 
> even wider field for improvements. I don't think that any of the 
> existing framework is the last word.
> 
> Dmitry Kazakov many times demanded multiple dispatch. AFAIK there is no 
> component model with MI support yet.
> 

I have just found that:

http://en.wikipedia.org/wiki/System_Object_Model

> SOM is also much more robust in terms of fully supporting a wide 
> variety of OO languages. Whereas basic COM essentially defines a 
> cut-down version of C++ to program to, SOM supports almost all common
> features and even some more esoteric ones. For instance SOM supports
> multiple inheritance, metaclasses and dynamic dispatching. Some of 
> these features are not found in most languages, which had led most 
> SOM/COM-like systems to be simpler at the cost of supporting fewer 
> languages. The full flexibility of multi-language support was 
> important to IBM, however, as they had a major effort underway to
> support both Smalltalk (single inheritance, dynamic dispatch) with
> C++ (multiple inheritance, fixed dispatch).
> 
> The most notable difference between SOM and COM is support for 
> inheritance � COM does not have any. It might seem odd that Microsoft
> produced an object library system that could not support one of the 
> most fundamental concepts of OO programming; the main reason for this
> is that it is difficult to know where a base class exists in a system
> where libraries are loaded in a potentially random order. COM demands
> that the programmer specify the exact base class at compile time,
> making it impossible to insert other derived classes in the middle
> (at least in other COM libraries).

Sounds awesome. Really awesome.

I have heard that OS/2 was superior but didn't imagine that it was 
superior to that extent.

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