From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,f34a46f284c01816
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news4.google.com!news2.google.com!proxad.net!news.cs.univ-paris8.fr!newsfeed.vmunix.org!newsfeed01.sul.t-online.de!newsmm00.sul.t-online.de!t-online.de!news.t-online.com!not-for-mail
From: Martin Krischik <martin@krischik.com>
Newsgroups: comp.lang.ada
Subject: Re: Base'Class is instance of Der1?
Date: Sat, 08 Jan 2005 16:00:06 +0100
Organization: None
Message-ID: <5342507.zygovnidUI@linux1.krischik.com>
References: <1105185677.254129.171840@c13g2000cwb.googlegroups.com>
 <2132851.tZm0acYkSN@linux1.krischik.com> <croqh7$4k5$1@titan.btinternet.com>
Reply-To: martin@krischik.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7Bit
X-Trace: news.t-online.com 1105196695 04 29202 XtqVrYNJi6o9240 050108 15:04:55
X-Complaints-To: usenet-abuse@t-online.de
X-ID: TbfWBvZarexRQDjcLogm3pa9M8EaIg949MWQsnF6kioOMZnCiQZds1
User-Agent: KNode/0.8.0
Xref: g2news1.google.com comp.lang.ada:7569
Date: 2005-01-08T16:00:06+01:00
List-Id: <comp.lang.ada>

Martin Dowie wrote:

> Martin Krischik wrote:
>> Hi R
>> 
>> R wrote:
>> 
>> 
>>>Hello.
>>>
>>>I've got function which has a parameter of type Base'Class.
>>>
>>>well I have 3 derived tagged records and depending of what exactly is
>>>the parameter I have to cast it to a proper function.
>> 
>> 
>> Maybe you want a view rename instead of a cast:
>> 
>> http://en.wikibooks.org/wiki/Programming:Ada:Subtypes#Rename_View
> 
> Surely:
> 
> type Parent_Type is tagged null record;
> type Child_Type is tagged null record;
> 
> Child_Instance : Child_Type;
> Parent_View : Parent_Type'Class renames Parent_Type'Class (Child_Type);
> 
> Should be:
> 
> type Parent_Type is tagged null record;
> type Child_Type is new Parent_Type with null record;
> 
> Child_Instance : Child_Type;
> Parent_View : Parent_Type'Class renames Parent_Type'Class
> (Child_Instance);

Ups, you are right! But why did you not hit the [edit] button and corrected
it?

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