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From: "Anthony E. Glover" <aeg@hiwaay.net>
Subject: Design Question: How Best To Structure Cross-Referencing Types In Ada
 95
Date: 1999/01/20
Message-ID: <36A68FCA.E1EEAFFE@hiwaay.net>#1/1
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Organization: ELMCO, Inc.
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Reply-To: aeg@hiwaay.net, glover@thaad.tecmasters.com
Newsgroups: comp.lang.ada
Date: 1999-01-20T00:00:00+00:00
List-Id: <comp.lang.ada>

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Just recently switched our development environment to Ada95 and have
come across a problem that may lend itself to some new Ada95 capability.
I have some new code that has private types that reference each other.
In Ada83 I have something that looks like:

package XYZ is
  type Part is private;
  type Car is private;
  procedure Install( On_Car   : Car;
                     The_Part : Part );
  procedure Activate( The_Part : Part );
private
  type Part is
    record
      Parent_Car : Car;
    end record;
  type Car is
    record
      Part1 : Part;
      Part2 : Part;
    end record;
end XYZ;

Since both types and some of the subprograms reference each other, I
have to  
put them both in the same package.  It turns out that I have about 5
types that
behave like this and I end up with one large package.  I would rather
have the
types split into different packages, but I would get circular
dependencies when
compiling the specs.

Is there a neat Ada95 way of getting around this cross-referencing
problem?

Tony
aeg@hiwaay.net
glover@thaad.tecmasters.com

  



-- 
Tony Glover
ELMCO, Inc.
(256)721-6317
aeg@hiwaay.net
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