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From: "Matthew Heaney" <mheaney@on2.com>
Newsgroups: comp.lang.ada
Subject: Re: limited types (Was: Records that could be arrays)
Date: 27 Feb 2006 08:52:23 -0800
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Date: 2006-02-27T08:52:23-08:00
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Dmitry A. Kazakov wrote:
>
> 1. Passing as a parameter

Just pass a cursor:

procedure Op (C : in out Container_Type) is
begin
   Do_Something (C.First);
   ...
end;

You know you've run out of elements when Has_Element returns False.


> 2. Copying

while (Has_Element (C) loop
  Put_Element_Somewhere (Element (C);
end loop;

> 3. Merging

You'll need to define a relational operator over your element type, but
then you can say:

Merge (C1.First, C2.First);


> 4. Slicing

Just use a cursor pair:

Do_Something (C1, C2);  -- half-open range


> 5. Closures and simultaneous traversal of two or more containers

Do_Something (C1, C2);


> 6. Relational operations on sets of containers

Compare (C1, C2);


If you don't understand this, go to

http://charles.tigris.org

and browse the Charles.Algorithms subsystem.  (Things are a little
different for the Ada 2005 container library, but it should give you
the general idea.)