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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII
X-Google-Thread: 103376,23777acd564d513b
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-01-21 03:43:09 PST
Message-ID: <3E2D3245.2060903@epfl.ch>
Date: Tue, 21 Jan 2003 12:43:01 +0100
From: =?ISO-8859-1?Q?Rodrigo_Garc=EDa?= <rodrigo.garcia@epfl.ch>
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020513
X-Accept-Language: en-us, en
MIME-Version: 1.0
Newsgroups: comp.lang.ada
Subject: Re: Problem Eliminating constructors
References: <3e274cad$0$33929$bed64819@news.gradwell.net>
 <3e2c66a7$0$33929$bed64819@news.gradwell.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
NNTP-Posting-Host: lglpc31.epfl.ch
X-Trace: epflnews.epfl.ch 1043149385 128.178.76.8 (21 Jan 2003 12:43:05 +0200)
Organization: EPFL
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!newsfeed.vmunix.org!news.imp.ch!news.imp.ch!news-zh.switch.ch!epflnews.epfl.ch!not-for-mail
Xref: archiver1.google.com comp.lang.ada:33286
Date: 2003-01-21T12:43:01+01:00
List-Id: <comp.lang.ada>

Victor Porton wrote:
> In article <3E2BDFD8.4070805@epfl.ch>,
> 	Rodrigo Garc�a <rodrigo.garcia@epfl.ch> writes:
> 
>>Victor Porton wrote:
>>
>>>package A is
>>>
>>>  type A_Type is tagged
>>>    record
>>>      X: Integer;
>>>    end;
>>>    
>>>  function Create(X: Integer) return A_Type; -- guess what is the body
>>>  
>>>end A;
>>>
>>>Then I have
>>>
>>>type B_Type is new A.A_Type with
>>>  record
>>>    Y: Integer;
>>>  end;
>>>
>>>Compiler requires me to override Create as the return type changes.
>>>But it is meaningless as now I need Create with two parameters
>>>instead of one.
>>>
>>>What to do?
>>
>>   You do not need a constructor for this simple case. This will create 
>>an A_Type object and initialize X to value 5.
>>
>>   declare
>>      My_A : A.A_Type := (X => 5);
> 
> [skip]
> 
> Oh, Rodrigo, I oversimplified the real situation. Initialization with
> just aggregates is possible only in the example, really I need namely
> constructor functions.

   I see... Have you tried with controlled types?

Rodrigo