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From: =?ISO-8859-1?Q?Hibou57_=28Yannick_Duch=EAne=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Got warnings when overriding Initialize and Finalize
Date: Fri, 10 Jul 2009 07:16:47 -0700 (PDT)
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Date: 2009-07-10T07:16:47-07:00
List-Id: <comp.lang.ada>

Hello,

I got some warnings which still stick to me when I want to override
Initialize and Finalize on controlled types.

Here is a reduced example of the matter :

> with Ada.Finalization;
> package Test is
>    type T is tagged limited private;
> private
>    type T is new Ada.Finalization.Limited_Controlled with null record;
>    overriding procedure Initialize (Object : in out T);
>    overriding procedure Finalize (Object : in out T);
> end Test;

This give me warnings like =93 warning: declaration of "Initialize"
hides one at line xxx =94 where xxx is the line of =93 type T is new
Ada.Finalization.Limited_Controlled with null record; =94. The same
warning appears for Finalize.

If there is no more private part, there is no more warnings. Ex ...

> with Ada.Finalization;
>    type T is new Ada.Finalization.Limited_Controlled with null record;
>    overriding procedure Initialize (Object : in out T);
>    overriding procedure Finalize (Object : in out T);
> end Test;

... does not produce any warnings.

If I do the following, there is no warning as well :

> with Ada.Finalization;
> package Test is
>    type T is new Ada.Finalization.Limited_Controlled with private;
>    overriding procedure Initialize (Object : in out T);
>    overriding procedure Finalize (Object : in out T);
> private
>    type T is new Ada.Finalization.Limited_Controlled with null record;
> end Test;

Is it mandatory to declare overriding of Initialize and Finalize in
the public part and thus to declare the T is an
Ada.Finalization.Limited_Controlled in the public part as well ?

But the Annotated RM contains this small excerpt :

AARM 7.6 17.h.2/1 says:
> package P is
>    type Dyn_String is private;
>    Null_String : constant Dyn_String;
>    ...
> private
>    type Dyn_String is new Ada.Finalization.Controlled with ...
>    procedure Finalize(X : in out Dyn_String);
>    procedure Adjust(X : in out Dyn_String);
>
>    Null_String : constant Dyn_String :=3D
>       (Ada.Finalization.Controlled with ...);
>    ...
> end P;

So what to think about these warnings ?

Is there something I am not seeing ?