From: David Abrahams (dave_at_[hidden])
Date: 2006-09-26 17:09:38
Joel de Guzman <joel_at_[hidden]> writes:
> David Abrahams wrote:
>> Joel de Guzman <joel_at_[hidden]> writes:
>>> joint_view is a prime example of a segmented sequence. The resulting
>>> iterators from it will have some overhead. That is inevitable. See
>>> joint_view_iterator so you'll know what I mean.
>> I don't get it. Fusion iterators know their position at
>> compile-time. Why should there be any overhead?
> joint_view_iterator needs to store these info:
> a) an iterator from the first sequence (left)
> b) an iterator from the second sequence (right)
> then, if you have a stacked joint_view_iterators, the outermost
> joint_view_iterator will be quite hefty.
-- Dave Abrahams Boost Consulting www.boost-consulting.com
Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk