#define QUANTITY_TYPE(_Mdim, _Ldim, _Tdim, _Adim, name)
constexpr QLength kilometer
constexpr QVolume centimeter3
constexpr QVolume decimeter3
constexpr QVolume millimeter3
constexpr QArea decimeter2
constexpr QLength meter(1.0)
constexpr QArea millimeter2
constexpr QLength centimeter
constexpr QVolume kilometer3
constexpr QLength millimeter
constexpr QArea centimeter2
constexpr QArea kilometer2
constexpr QLength decimeter