Re: Problem Eliminating constructors

["Rodrigo García" <rodrigo.garcia@epfl.ch>]

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