Re: [boost] [fusion] More quanfusion

From: David Abrahams (dave_at_[hidden])
Date: 2006-09-14 07:01:17

"Andy Little" <andy_at_[hidden]> writes:

> "David Abrahams" wrote
>> Joel de Guzman  writes:
>>
>>> advance_iterator looks general enough.
>>
>> What *is* an advance_iterator?
>
> FWIW:
>
>  fusion::advance_iterator<
>     Sequence,                      // the sequence to advance over
>     Stride,                             // number of positions in underlying 
>                                           //sequence to move on 'next'
>     StridedPosition,            //  underlying sequence::position *
>                                           //    Stride + Offset
>     Offset                             // offset in underlying sequence units
>>
>
> The main use is to  return a column in a linear sequence representing a matrix.

That's a well-known idea already in the literature; it's known as a
"strided iterator."  Can we use the common terminology?

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com