#define QUANTITY_TYPE(_Mdim, _Ldim, _Tdim, _Adim, name)
constexpr QLength kilometer
constexpr QArea decimeter2
constexpr QLength meter(1.0)
constexpr QArea millimeter2
constexpr QLength centimeter
constexpr QLength millimeter
constexpr QArea centimeter2
constexpr QArea kilometer2
constexpr QLength decimeter