From: Dmitry A. Kazakov <mailbox@dmitry-kazakov.de>
Subject: Re: Out parameters in a function
Date: Fri, 26 Apr 2002 09:32:31 +0200
Date: 2002-04-26T09:32:31+02:00 [thread overview]
Message-ID: <j30icucqvku7pb4snto340ms5ts4eq5gmf@4ax.com> (raw)
In-Reply-To: 3CC6E99F.3000603@home.com
On Wed, 24 Apr 2002 17:21:37 GMT, "Warren W. Gay VE3WWG"
<ve3wwg@home.com> wrote:
>Dmitry A. Kazakov wrote:
>
>> On Tue, 16 Apr 2002 20:00:42 +0000 (UTC), "Kent Paul Dolan"
>> <xanthian@well.com> wrote:
>
>...
>
>> Same in Ada:
>>
>> declare
>> aSomestructTypedVariable : constant SomestructType :=
>> aSomestructReturningFunction (...);
>> begin
>> if aSomestructTypedVariable.booleanPart then
>> usefulVal := aSomestructTypedVariable.usefulPart;
>> end if;
>> end;
>
>You could take this one step further (or perhaps this is implied)
>and make the returned "SomestructType" a discriminated type. That
>way if the value .booleanPart is false, the other member(s) of the
>record/structure is invalid to access, maintaining safety.
Yes, indeed. Safety is a good point. Ada offers many nice
possibilities with that respect. Another is to return a class wide
object with later dispatch on something like Use_That_Stuff.
Regards,
Dmitry Kazakov
www.dmitry-kazakov.de
next prev parent reply other threads:[~2002-04-26 7:32 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-14 18:29 Out parameters in a function Nazgul
2002-04-14 19:45 ` David C. Hoos, Sr.
2002-04-15 10:49 ` John McCabe
2002-04-15 11:51 ` John McCabe
2002-04-15 13:43 ` Steve Doiel
2002-04-15 15:09 ` Ted Dennison
2002-04-16 8:49 ` John McCabe
2002-04-16 10:05 ` Dmitry A. Kazakov
2002-04-16 15:26 ` John McCabe
2002-04-16 19:34 ` Matthew Woodcraft
2002-04-16 20:10 ` Darren New
2002-04-17 1:30 ` Kent Paul Dolan
2002-04-17 16:15 ` Darren New
2002-04-19 17:39 ` Florian Weimer
2002-04-17 13:24 ` Stephen Leake
2002-04-17 16:32 ` Darren New
2002-04-17 21:03 ` Kent Paul Dolan
2002-04-18 12:14 ` Wolfgang Gellerich
2002-04-18 13:52 ` Dmitry A. Kazakov
2002-04-18 16:28 ` Darren New
2002-04-17 10:17 ` John McCabe
2002-04-16 19:58 ` Kent Paul Dolan
2002-04-16 20:00 ` Kent Paul Dolan
2002-04-17 4:40 ` Jim Rogers
2002-04-17 5:27 ` Kent Paul Dolan
2002-04-17 5:50 ` Eric G. Miller
2002-04-24 2:45 ` David Thompson
2002-04-19 17:40 ` Florian Weimer
2002-04-19 18:26 ` Jim Rogers
2002-04-19 18:53 ` Florian Weimer
2002-04-17 7:57 ` Dmitry A. Kazakov
2002-04-17 10:21 ` John McCabe
2002-04-24 17:21 ` Warren W. Gay VE3WWG
2002-04-26 7:32 ` Dmitry A. Kazakov [this message]
2002-04-15 16:24 ` Stephen Leake
2002-04-16 13:38 ` Ted Dennison
2002-04-17 11:55 ` Ingo Marks
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