On 10/13/2010 10:50 AM, David Abrahams wrote:
At Wed, 13 Oct 2010 17:38:56 +0100, Mathias Gaunard wrote: [...]
Segmented iterators are only useful if the iteration of all my segments is done with the exact same logic but at different locations, since they all must have the same type. They don't allow to circumvent the problem I exposed with normal iterators at all.
I think they do. However, you might find that you need some dynamic dispatching to get it to work. In other words,
if (operating on complete segment) SIMD algorithm else elementwise algorithm
That doesn't seem any better than what I would imagine the range_detail::join_iterator does. I.e., I don't see what segmented iteration buys us here over what I'd imagine Mathias is currently doing (which, I'd imagine, is some variant on a joint_iterator that returns aligned packets). - Jeff