On 19-02-2014 02:51, Eric Niebler wrote:
On 02/18/2014 10:30 AM, Neil Groves wrote:
I agree that many scenarios would end in much unhappiness! I disagree that unhappiness is pretty much guaranteed. I believe there are valid scenarios that would be broken by increasing the requirements to demand single-pass traversal. The most common case that I think would be broken in my own code is where I am using a random-access iterator to stride.
Why in the world does a stride iterator need to be random-access? Here is a strided range adaptor that works with input iterators:
https://github.com/ericniebler/range-v3/blob/master/include/range/v3/view/st...
It's not even hard.
I guess it may have been because it was the easiest. I see you have special handling of bidirectional iterators. Anyway, nice to see your improvements. :-) -Thorsten