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Newsgroups: comp.lang.ada
Subject: Re: Ada & Postgresql
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From: Jean-Marc Bourguet <jm@bourguet.org>
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Date: 06 Sep 2004 17:18:47 +0200
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Date: 2004-09-06T17:18:49+02:00
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Marius Amado Alves <amado.alves@netcabo.pt> writes:

> > ...I can't pinpoint now what annoying Ada 95 feature I was escaping back
> > in 2001 when I wrote this package and its applications. Never mind. Just
> > write Pgsql_Controlled.
> 
> OK, I just took the time to write this. While I'm at it, I'll control also
> Db_Type, to call Close on finalization. Oops, no, Ada 95 does not let me do
> that, it makes
> 
>     function Execute (Db: Db_Type; Command: String) return Result_Type;
> 
> illegal, because an "operation can be dispatching in only one type."

The fact that all (well I'm not sure, that's so long ago that I could
program in Ada, and it make me think about freezing rules that I've
never really mastered) subroutines defined in the same package as a
type having that type as argument or result are primitive operations
is sometimes annoying, but there is an easy work around: provide it in
a nested package and then use a renaming.

Yours,

-- 
Jean-Marc