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From: David Abrahams (dave_at_[hidden])
Date: 2004-11-15 15:01:14

John Torjo <john.lists_at_[hidden]> writes:

>>>It maps ok with bidirectional/random access. If an iterator has a
>>>given iterator category, the range will preserve it. I have used it in
>>>code, and it's quite powerful.
>> Don't you need a current position, start and an end for
>> bidirectional
>> iteration? Forward "ranges" just get a current position and an end.
> In my view, bidirectional means that the begin() iterator from the
> range can move both ways, and that it still has an end() of the range.

Why is it important to have an end but not to have a beginning?

Dave Abrahams
Boost Consulting

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