* Null record
@ 2003-08-16 4:54 Adrian Hoe
2003-08-16 9:10 ` Preben Randhol
2003-08-16 12:58 ` Matthew Heaney
0 siblings, 2 replies; 3+ messages in thread
From: Adrian Hoe @ 2003-08-16 4:54 UTC (permalink / raw)
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.
Regards,
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: Null record
2003-08-16 4:54 Null record Adrian Hoe
@ 2003-08-16 9:10 ` Preben Randhol
2003-08-16 12:58 ` Matthew Heaney
1 sibling, 0 replies; 3+ messages in thread
From: Preben Randhol @ 2003-08-16 9:10 UTC (permalink / raw)
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)
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: Null record
2003-08-16 4:54 Null record Adrian Hoe
2003-08-16 9:10 ` Preben Randhol
@ 2003-08-16 12:58 ` Matthew Heaney
1 sibling, 0 replies; 3+ messages in thread
From: Matthew Heaney @ 2003-08-16 12:58 UTC (permalink / raw)
"Adrian Hoe" <mailbox@nospam.adrianhoe.com.my> wrote in message
news:3f3db971_1@news.tm.net.my...
> Which is the most popular form and why? I assume personal preference
> influences the choice.
Method #1.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2003-08-16 4:54 Null record Adrian Hoe
2003-08-16 9:10 ` Preben Randhol
2003-08-16 12:58 ` Matthew Heaney
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