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From: dewar@cs.nyu.edu (Robert Dewar)
Subject: Re: GNAT 3.03 and Address Clauses
Date: 1996/05/06
Message-ID: <dewar.831380424@schonberg>#1/1
X-Deja-AN: 153265839
references: <31850E0F.136C@software.org> <4mfob7$fbc@dfw.dfw.net>
organization: Courant Institute of Mathematical Sciences
newsgroups: comp.lang.ada
Date: 1996-05-06T00:00:00+00:00
List-Id: <comp.lang.ada>


Dave Weller said

"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;"

What happens here is that informally the To_Address call seems like
a static expression, even though it is not technially one. On the list
to do is to specially allow this particular non-static expression in this
context to reduce the number of cases of this kind.