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From: pascal.malaise@gmail.com
Newsgroups: comp.lang.ada
Subject: Re: Object.Operation and child package
Date: Wed, 25 Jun 2008 22:56:33 -0700 (PDT)
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Date: 2008-06-25T22:56:33-07:00
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Thank you all for the explanation.
For the record, the most appropriate solution seems to be:

package Pack.Sub is
  type Sub_Typ is new Typ with private;
  procedure Proc2 (Var : in Sub_Typ);
private
  type Sub_Typ is new Typ with null record;
end Pack.Sub;

with Pack.Sub;
procedure Proc is
  O : Pack.Sub.Sub_Typ;
begin
  O.Proc1;
  O.Proc2;
end Proc;