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From: "Martin Dowie" <martin.dowie@baesystems.com>
Newsgroups: comp.lang.ada
Subject: Re: problems with classes
Date: Mon, 4 Oct 2004 11:19:42 +0100
Organization: BAE SYSTEMS
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Date: 2004-10-04T11:19:42+01:00
List-Id: <comp.lang.ada>

Dmitry A. Kazakov wrote:
> You cannot complete X in the private part, because you have promised
> that X will be completed in the public part. So either:
>
> package Foo is -- LEGAL
>    ...
> private
>    type X; -- Incomplete declaration
>    type X is range 1..20; -- Type completion and full view
>
> or
>
> package Foo is -- LEGAL
>    type X; -- Incomplete declaration
>    type X is range 1..20; -- Type completion and full view
> private
>    ...

And don't forget...

package Foo is
private
   type X;  -- Incomplete declaration; an "opaque type"
end Foo;

package body Foo is
   type X is range 1 .. 20;  -- No public view
   ...
end Foo;