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From: porton@ex-code.com (Victor Porton)
Subject: Finalization of tagged types - problem
Date: Mon, 13 Jan 2003 06:11:23 +0500
Date: 2003-01-13T04:48:06+00:00	[thread overview]
Message-ID: <3e224506$0$33924$bed64819@news.gradwell.net> (raw)

I have a non-limited tagged type (not derived from
Ada.Finalization.Controlled) Base.

I derive:

type State_Type is new Base with
   record
      -- ...
      Finalizer: Finalizer_Type(State_Type'Access);
   end record;

I want to add a component with back-reference derived
from Ada.Finalization.Controlled or
Ada.Finalization.Limited_Controlled for auto-finalization
of State_Type.

But

type Finalizer_Type(State: access State_Type) is
   new Ada.Finalization.Controlled with null record;
   
Compiler: "Access discriminant are allowed only for limited types".

Can be done something among the obvious but imperfect
solutions: 1. make Base controlled. 2. make Base limited
and derive Finalizer_Type from Limited_Controlled instead?



             reply	other threads:[~2003-01-13  1:11 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-01-13  1:11 Victor Porton [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-01-13  8:21 Finalization of tagged types - problem Grein, Christoph
2003-01-13 11:28 ` Victor Porton
2003-01-13 11:48 Grein, Christoph
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