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From: David Sauvage <david.sauvage@adalabs.com>
Newsgroups: comp.lang.ada
Subject: Re: Why constant components are not permitted ?
Date: Thu, 24 Nov 2011 11:49:09 -0800 (PST)
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Date: 2011-11-24T11:49:09-08:00
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On 24 nov, 23:06, a...@att.net wrote:
> =A0 type test is record
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0a : integer :=3D 16#FFFF# ;
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0b : string ( 1 .. 4 ) :=3D "this" ; --=
 is OK
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0c : string :=3D "is" ; -- error becaus=
e no define boundary
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0end record ;
>
> Reason no one ask the ARG.

ok, but the following is also not permitted

type Object is record
   Tag : constant Positive :=3D 42; -- GNAT compilation failed :
constant components are not permitted
end record;

There is something special about constant components, no related to
unconstrained types in record.


Cheers