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From: Preben Randhol <randhol+abuse@pvv.org>
Newsgroups: comp.lang.ada
Subject: Re: Null record
Date: Sat, 16 Aug 2003 09:10:00 +0000 (UTC)
Organization: Norwegian university of science and technology
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Adrian Hoe wrote:
> Hi,
> 
> Just a silly question.
> 
> A null record can be implemented as follow:
> 
> Method 1:
> 
> type Blank is new Some_Record with null record;
> 
> Method 2:
> 
> type Blank is new Some_Record with
>     record
>        null;
>     end record;
> 
> 
> Which is the most popular form and why? I assume personal preference 
> influences the choice.

I think Method 1 was made particularily for this usage. I would say
Method 1 as Method 2 looks like incomplete code if you consider:

   procedure Do_Something_Callback (Object : T) is
   begin
      null;
   end Do_Something_Callback;

which could be automatically generated from a spec file.

-- 
�I think fish is nice, but then I think that rain is wet.
 So who am I to judge.�
                 - The Hitch Hiker's Guide to the Galaxy (radioplay)