Re: Concatenate enumeration

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Fri, 22 Oct 2010 21:49:26 +0200, okellogg  
<okellogg@users.sourceforge.net> a écrit:

> In  
> https://groups.google.com/group/comp.lang.ada/browse_thread/thread/33ce43bfeafb2681/237f979efee731d3,
> Randy Brukardt wrote:
>
>> "Robert A Duff" <bobd...@shell01.TheWorld.com> wrote in message
>> news:wcctywksu8t.fsf@shell01.TheWorld.com...
>> ...
>>
>> >> You can't. Enumeration types are not extensible.
>>
>> > Extensible enumeration types were proposed for Ada 9X,
>> > but were dropped.
>>
>> And were proposed again for Ada 2005, and were dropped again. See
>> AI95-0261-1. I doubt it will ever be proposed again.
>
> I wonder why this has not been picked up - especially when looking at
> all the new features that are making it into Ada2012.
>
> Oliver
I remember I made the same request when I felt it would be nice to be able  
to extend an enumeration in multiple client packages, just like the way  
you can extend a tagged record with additional members. Otherwise, I had  
to declare all items of the enumeration, including many ones which was  
meaning nothing in the context of the root package, or else had to  
simulate enumeration extension in a tedious and not clean way (with  
incompatible types, awkward conversion based on 'Pos / 'Val, and the like).

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