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From: Martin Krischik <krischik@users.sourceforge.net>
Newsgroups: comp.lang.ada
Subject: Re: oo programing question
Date: Mon, 08 Dec 2003 20:04:05 +0100
Organization: AdaCL
Message-ID: <1717882.x5JnQBoSJY@linux1.krischik.com>
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Date: 2003-12-08T20:04:05+01:00
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shoko wrote:

> here is my generic package:
> generic
>    type Element_Type is private;
> 
>    package queue is
>      type Queue  is abstract tagged private;
>      
>      type newqueue is new Queue ;<-- how to create new queue type?

   type New_Queue is tagged new Queue with private ;
      
>      procedure Init( Q: in out Queue) is abstract;

Just a thought:

function New_Queue return Queue;
 
>      private
>          type Queue is  abstract tagged
>            record
>               value:Element_Type;
>            end record;
>    
>    end queue;
> 
> i need to create a new abstract type(newqueue) that will inherit from
> Queue.
> 
>   
> then need to put the new type(newqueue) in the same generic Queue package,
> and to add a new method to the new abstract type.
> 
> the reason that the new abstract type(newqueue) should be in the same
> package is: i have a type that inherit from Queue
> and now i need a new type that inherit from the new abstract type
> (newqueue) and will be the same as the one that inherit from Queue.

This might still be possible with a child package.

With Regards

Martin


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