[eigen] [Sparse] InnerIterator not assignable

[<bernard.hugueney@xxxxxxxxxx>]

Hi,
While wrapping Eigen::Sparse iterator into something like :
"
    NNZSparseIterator& operator++()
    {
        ++innerIt;
        if(!innerIt)
        {
            if(++outerIdx >= sp.outerSize())
            {
                outerIdx= 0;
            }
            innerIt= typename Sp::InnerIterator(sp, outerIdx); // <- 
fail
        }
        return *this;
    }

I fail to compile the "// -<fail" line because template<typename 
Scalar, int _Options, typename _Index>
class SparseMatrix<Scalar,_Options,_Index>::InnerIterator has some 
const members.[*]

Would it be possible to remove this constness in order to have 
assignable InnerIterator ?

Best regards,

Bernard

[*] 
https://bitbucket.org/eigen/eigen/src/04e0683a1547/Eigen/src/Sparse/SparseMatrix.h#cl-639
m_outer and m_end.