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From: "Randy Brukardt" <randy@rrsoftware.com>
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Subject: Re: GCC 4.0 Ada.Containers Cursor danger.
Date: Tue, 12 Jul 2005 15:38:04 -0500
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Date: 2005-07-12T15:38:04-05:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message
news:1qm62kbb1qwnl.ywnvsfug5p88.dlg@40tude.net...
...
> It is not, you just have replaced "changes that preserve the iteration
> order and the membership" with "insignificant changes". Then passive,
> one-way iterators are more or less acceptable. Cursors are much more
> questionable.

I don't think that there is any guarantee that iteration via cursor will
actually work for an unordered (hashed) container. In practice, it usually
will work, but there is nothing in the standard that requires that (unless
"there are no intervening operations", but that would be a pretty useless
iteration!).

Cursors also have uses that have nothing to do with iteration, of course.

                         Randy.