From: dweller@dfw.net (David Weller)
Subject: Re: GNAT 3.03 and Address Clauses
Date: 1996/05/04
Date: 1996-05-04T00:00:00+00:00 [thread overview]
Message-ID: <4mfob7$fbc@dfw.dfw.net> (raw)
In-Reply-To: 31850E0F.136C@software.org
In article <31850E0F.136C@software.org>,
Rob Pettit <pettit@software.org> wrote:
[Indicated he was having trouble with this code:]
> Device_Data : Device_Data_Type;
> Device_Address : constant System.Address
> := System.Storage_Elements.To_Address(16#FFFF_0000#);
>
> for Device_Data'Address use Device_Address;
>
> end Address_Test;
>
>GNAT 3.03 subsequently gives the following error message:
> address_test.ads:13:32: invalid address clause for "Device_Data"
> address_test.ads:13:32: must be constant defined before "Device_Data"
> (RM 13.1(22))
>
>Can anyone provide advice for compiling this code using GNAT?
>Thanks in advance!
>
The solution is pretty easy, GNAT's giving you a pretty strong hint:
Device_Address : constant System.Address
:= System.Storage_Elements.To_Address(16#FFFF_0000#);
Device_Data : Device_Data_Type;
for Device_Data'Address use Device_Address;
Will compile just fine.
(Don't feel too silly, I made the same mistake about a year ago :-)
--
Visit the Ada 95 Booch Components Homepage: www.ocsystems.com/booch
This is not your father's Ada -- lglwww.epfl.ch/Ada
next prev parent reply other threads:[~1996-05-04 0:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-04-29 0:00 GNAT 3.03 and Address Clauses Rob Pettit
1996-04-29 0:00 ` Robert A Duff
1996-05-04 0:00 ` David Weller [this message]
1996-05-06 0:00 ` Robert Dewar
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