xtensor_2_N_8.hpp

template <class S>
auto data_offset(const S&) noexcept
{
    return typename S::value_type(0);
}

template <class S, class I, class... Args>
auto data_offset(const S& strides, I i, Args... args) noexcept
{
    constexpr std::size_t nargs = sizeof...(Args) + 1;
    if (nargs == strides.size())
    {
        // Correct number of arguments: iterate
        return raw_data_offset<0>(strides, arg, args...));
    }
    else if (nargs > strides.size())
    {
        // Too many arguments: drop the first
        return data_offset(strides, args...);
    }
    else
    {
        // Too few arguments: right to left scalar product
        auto view = strides.cend() - nargs;
        return raw_data_offset<0>(view, arg, args...));
    }
}