From: AG <ang@xtra.co.nz>
Subject: Re: Warning in generic instantiation
Date: 1999/05/10
Date: 1999-05-10T00:00:00+00:00 [thread overview]
Message-ID: <373655C9.40539E09@xtra.co.nz> (raw)
In-Reply-To: 3734BB9E.F51ED23B@xtra.co.nz
I realize I posted that on the weekend, but there were
quite a few postings since. So, could some of the language
experts comment on the following:
AG wrote:
> Could somebody comment on the following warning
> I get from ObjectAda compiler (7.1.105) when trying
> that:
>
> generic
> size: positive;
> type item is (<>);
> procedure matcher;
>
> procedure matcher is
> type set is array(0..size-1) of item;
> type unit is record
> what: set; -- *** 1
> end record;
> begin
> null;
> end;
>
> with matcher;
> procedure start is
> type unit is (a, b, c);
> size: positive;
> begin
> declare
> procedure match is new matcher(size, unit); -- *** 2
> begin
> null;
> end;
> end;
>
> The warning I get at line ***2 is:
>
> LRM:13.3(16),Object does not have a meaningful address,
> returning a null address
>
> My questions about that:
>
> 1. I don't quite see how 13.3(16) is applicable since I don't
> directly use anything mentioned there. Is there something
> implicit involved?
>
> 2. If line ***1 is replaced with NULL, the warning goes
> away. So is the warning due to finalising "set" or due to
> declaring "unit"?
>
> 3. Generally, what's wrong with the above usage? After
> all, those types are declared locally or does it matter?
>
> 4. Also, it was only a warning so the program compiles
> and links and runs with no run-time errors even if I declare
> and use objects of "unit" type. So, what was the warning
> all about?
>
> Thanks,
> AG
next prev parent reply other threads:[~1999-05-10 0:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-09 0:00 Warning in generic instantiation AG
1999-05-10 0:00 ` Tucker Taft
1999-05-10 0:00 ` AG [this message]
1999-05-10 0:00 ` Robert Dewar
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox