From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>
Subject: Re: Storage_Error: mine's or gnat's fault?
Date: Fri, 3 Jun 2016 15:45:54 -0700
Date: 2016-06-03T15:45:54-07:00 [thread overview]
Message-ID: <nit1b3$ov9$1@dont-email.me> (raw)
In-Reply-To: <nistlu$ak5$1@dont-email.me>
On 06/03/2016 02:43 PM, Alejandro R. Mosteo wrote:
>
> function First_Element (Container : List) return Element_Type is
> begin
> if Checks and then Container.First = null then
> raise Constraint_Error with "list is empty";
> end if;
>
> return Container.First.Element.all; -- <-- RAISES
> end First_Element;
What is Checks? If it is/returns False when the list is empty, you'll try to
dereference null.
--
Jeff Carter
"I wave my private parts at your aunties."
Monty Python & the Holy Grail
13
next prev parent reply other threads:[~2016-06-03 22:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-03 21:01 Storage_Error: mine's or gnat's fault? Alejandro R. Mosteo
2016-06-03 21:43 ` Alejandro R. Mosteo
2016-06-03 22:45 ` Jeffrey R. Carter [this message]
2016-06-03 22:48 ` Jeffrey R. Carter
2016-06-04 18:50 ` Simon Wright
2016-06-05 14:05 ` Alejandro R. Mosteo
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