xtensor_8_N_14.hpp

gistfile1.txt

template <layout_type L>
struct stepper_tools
{
    template <class S, class IT, class ST>
    static void increment_stepper(S& stepper,
                                  IT& index,
                                  const ST& shape);
};

template <>
template <class S, class IT, class ST>
void stepper_tools<layout_type::row_major>::increment_stepper(S& stepper,
                                                              IT& index,
                                                              const ST& shape)
{
    using size_type = typename S::size_type;
    size_type i = index.size();
    while (i != 0)
    {
        --i;
        if (index[i] != shape[i] - 1)
        {
            ++index[i];
            stepper.step(i);
            return;
        }
        else
        {
            index[i] = 0;
            if (i != 0)
            {
                stepper.reset(i);
            }
        }
    }
    if (i == 0)
    {
        std::copy(shape.cbegin(), shape.cend(), index.begin());
        stepper.to_end(layout_type::row_major);
    }
}