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From: Martin Krischik <martin@krischik.com>
Newsgroups: comp.lang.ada
Subject: Re: how can i allocate an objekt with initialization???
Date: Mon, 06 Dec 2004 09:52:04 +0100
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Message-ID: <3459883.9H2ke8dEzz@linux1.krischik.com>
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Date: 2004-12-06T09:52:04+01:00
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Thomas Bruns wrote:

> TEST : FATHER_CLASS_PTR;
> 
> begin
>  TEST:= new CHILD_CLASS'( INT=>1); -- i will initialze the objekt here,but

Since you are initializing an element form the parent class you need to
initialize the child as well:

TEST:= new CHILD_CLASS'(
                         INT1 =>1
                         INT2 =>1);

only the other way round you can shortcut:

TEST:= new CHILD_CLASS'(
                         FATHER_CLASS
                     WITH
                         INT2 =>1); 

And the standart question for beginners: Are you shure you need a pointer?
Unlike C/C++/Java Ada allows for:

TEST : FATHER_CLASS'Class  :=�CHILD_CLASS'(
                         INT1 =>1
                         INT2 =>1);

You can use inheritance in Ada without using pointers! FATHER_CLASS'Class
can be used just like a String - you can pass it around as parameter,
return it from a function, store it in a record. There are collection
libraries where you can store them.

With Regards

Martin
-- 
mailto://krischik@users.sourceforge.net
http://www.ada.krischik.com