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From: Martin Krischik <krischik@users.sourceforge.net>
Newsgroups: comp.lang.ada
Subject: Re: Question about OO programming in Ada
Date: Mon, 08 Dec 2003 20:33:20 +0100
Organization: AdaCL
Message-ID: <1998676.6fRVD2dq80@linux1.krischik.com>
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Date: 2003-12-08T20:33:20+01:00
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Dmitry A. Kazakov wrote:

> On Mon, 08 Dec 2003 08:42:28 GMT, Hyman Rosen <hyrosen@mail.com>
> wrote:
 
> class X
> {
> public :
>    virtual void Foo ();
>    virtual void Baz ()
>    {
>       Foo ();
>    }

> Is the call to Foo from Baz dispatching? The answer is, well,
> sometimes it will.

No, the aswer is yes because you call:

       this->Foo ();

and calls via pointer dispach.

> [*]  "this" is a class-wide pointer when Baz was not directly or
> indirectly called from a constructor/destructor. It is a specific
> pointer otherwise.

This is why one should avoid calling virtual functions in conctructors or
destructors. And if you need to you schould consider making the call non
dispaching: 

X::Foo ();

With Regards

Maritn

-- 
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http://adacl.sourceforge.net