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From: AdaMagica <christoph.grein@eurocopter.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada requires too much typing!
Date: Thu, 10 Jun 2010 00:20:35 -0700 (PDT)
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On 10 Jun., 08:34, Vadim Godunko <vgodu...@gmail.com> wrote:
> I want to known more about how to use OOP in Ada without access types!

type Element is tagged ...
subtype Any_Element is Element'Class;

procedure Show (E: Element);

A: Element;
X: Any_Element := Initial_Value;

Show (A);            -- no dispatch
Show (X);            -- dispatches
Show (Element (X));  -- no dispatch

type Special_Element is new Element with ...;

procedure Handle (S: Special_Element) is
begin
  Show (S);                -- no dispatch
  Show (Any_Element (S));  -- re-dispatch
end Handle;