Function operator/

example/misc/dimensional_analysis.cpp:59–62

template <typename D1, typename D2>
auto operator/(quantity<D1> a, quantity<D2> b) {
    using D = decltype(hana::zip_with(std::minus<>{}, D1{}, D2{}));
    return quantity<D>{static_cast<double>(a) / static_cast<double>(b)};
}

int main() {
    quantity<mass>         m{10.3};