IndexMapType indexmap() const {
// extract strides and lengths
const size_t dim =arr_obj->nd;
std::vector<size_t> lengths (dim);
std::vector<std::ptrdiff_t> strides(dim);
for (size_t i=0; i< dim ; ++i) {
lengths[i] = size_t(arr_obj-> dimensions[i]);
strides[i] = std::ptrdiff_t(arr_obj-> strides[i])/sizeof(ValueType);
}
return IndexMapType (mini_vector<size_t,IndexMapType::rank>(lengths), mini_vector<std::ptrdiff_t,IndexMapType::rank>(strides),0);
}
IndexMapType indexmap() const { return IndexMapType (lengths,strides,0); }