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-Thread: 103376,29523eff834b8169
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,UTF8
Path: 
 g2news1.google.com!news4.google.com!feeder.news-service.com!85.214.198.2.MISMATCH!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Warnings about hiding
Date: Fri, 08 Oct 2010 21:24:19 +0100
Organization: A noiseless patient Spider
Message-ID: <m239sgjuvg.fsf@pushface.org>
References: <44e7dff1-04f5-46ad-8521-e4fe030c9c29@26g2000yqv.googlegroups.com>
	<86ad4138-6b93-4b1d-a3ba-6ffed2d9d5c0@t5g2000prd.googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Injection-Date: Fri, 8 Oct 2010 20:24:22 +0000 (UTC)
Injection-Info: mx03.eternal-september.org;
 posting-host="dFCm8HWntFqmDIilBLqEJQ";
	logging-data="6852"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX1/bC12WrouIWPoDIkMBJf8rmqHuKQGUXdE="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (darwin)
Cancel-Lock: sha1:6b6jhjcBYRmU2svkxgZlpSY8DxU=
	sha1:bZQg7UIEaTW257UoWs2rKkqUrE8=
Xref: g2news1.google.com comp.lang.ada:14452
Date: 2010-10-08T21:24:19+01:00
List-Id: <comp.lang.ada>

Adam Beneschan <adam@irvine.com> writes:

> On Oct 8, 5:47 am, Julian Leyh <jul...@vgai.de> wrote:
>> Hi,
>>
>> "-gnatwh" activates warnings on hiding declarations. But sometimes,
>> hiding is necessary.
>>
>> For example, consider this (Controlled type with it's own comparison
>> operator and finalize procedure, you can reproduce the errors using
>> these ads files):
>>
>> $ cat foo.ads
>> with Ada.Finalization;
>> package foo is
>>    type Foobar is new Ada.Finalization.Controlled with null record;
>>    function "=" (L,R : in Foobar) return Boolean;
>> private
>>    procedure Finalize (Object : in out Foobar);
>> end foo;
>> $ gnat -gnatwh -gnatc foo.ads
>> gcc -c -gnatwh -gnatc foo.ads
>> foo.ads:4:13: warning: declaration of "=" hides one in package
>> Standard
>> foo.ads:6:14: warning: declaration of "Finalize" hides one at line 3
>> $
>
> Well, I was going to suggest using the "overriding" keyword (not a bad
> idea anyway), but when I tried it, GNAT still displayed the warnings.
> Now *that* looks like a bug.  (I'm using 4.3.3; maybe it's been fixed
> in a later version)

Still there in GCC 4.5.0 & GNAT GPL 2010.