From: tmoran@acm.org
Subject: Re: Variant Record Component
Date: Wed, 26 Feb 2003 21:37:47 GMT
Date: 2003-02-26T21:37:47+00:00 [thread overview]
Message-ID: <Lsa7a.275675$be.253360@rwcrnsc53> (raw)
In-Reply-To: 3E5D00D6.F6A20AD2@boeing.com
> Is there a way to determine if an object of some variant record type
> contains a specific variant component, other than a trying it and
> handling a possible constraint error?
Do you mean a situation with a non-simple "case" like:
type r(v : integer) is record
case v is
when 0 => a:integer;
when 1 | 2 | 3 => b:integer;
when others => null;
end case;
end record;
where you would essentially have to replicate the "case" statement,
and you would rather just ask "if x.b exists"?
next prev parent reply other threads:[~2003-02-26 21:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-26 18:00 Variant Record Component John Harbaugh
2003-02-26 19:08 ` Stephen Leake
2003-02-27 8:17 ` Anders Wirzenius
2003-02-27 8:46 ` John McCabe
2003-02-27 17:26 ` phone number database Stephen Leake
2003-02-27 18:09 ` tmoran
2003-02-28 0:07 ` Matthew Heaney
2003-02-28 6:46 ` Hijacking threads (was phone number database (was Variant Record Component)) Anders Wirzenius
2003-02-26 20:50 ` Variant Record Component David C. Hoos
2003-02-28 16:15 ` John Harbaugh
2003-02-28 18:18 ` tmoran
2003-02-28 22:07 ` John Harbaugh
2003-02-28 20:51 ` Randy Brukardt
2003-03-01 2:34 ` Jeffrey Carter
2003-03-03 9:24 ` John McCabe
2003-02-26 21:37 ` tmoran [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-02-28 19:40 David C. Hoos
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