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From: "Dmitriy Anisimkov" <anisimkov@yahoo.com>
Newsgroups: comp.lang.ada
Subject: Re: GCC 4.0 Ada.Containers Cursor danger.
Date: 7 Jul 2005 10:56:48 -0700
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<<
> generic
>    procedure Process (Key : Key_Type; Value : Value_Type; Stop : out

If you are worried about Ada 2006's Iterate using Cursors internally
(in the Process procedure), what makes you sure that the programmers
writing the procedure for Process in Generic_Iterate above will
not use the wrong key in their procedure? >>

Because they get it in "in" parameter from library, they do not have
any reason to change it.

<<So are keys really always more safe than Cursors? >>

For sure. There is only 2 possible situations,  found/not found. Some
routines could raise exception if not found. others raise exceptions in
found, others returns boolean value depend on found or not found.