40#if !defined(DISABLE_PREDEFINED_UNITS) || defined(ENABLE_PREDEFINED_MASS_UNITS)
43UNIT_ADD(mass, metric_ton, metric_tons, t,
unit<
std::ratio<1000>, kilograms>)
45 unit<
std::ratio<45359237, 100000000>, kilograms>)
52 unit<
std::ratio<145939029, 10000000>, kilograms>)
#define UNIT_ADD_CATEGORY_TRAIT(unitCategory)
Macro to create the is_category_unit type trait.
Definition: base.h:371
Implement std::hash so that hash_code can be used in STL containers.
Definition: array.h:89
Unit Conversion Library namespace.
Definition: temperature.h:31
UNIT_ADD(temperature, kelvin, kelvin, K, unit< std::ratio< 1 >, units::category::temperature_unit >) UNIT_ADD(temperature
UNIT_ADD_WITH_METRIC_PREFIXES(mass, gram, grams, g, unit< std::ratio< 1, 1000 >, units::category::mass_unit >) UNIT_ADD(mass
pounds
Definition: mass.h:44
pound
Definition: mass.h:44
Class representing SI base unit types.
Definition: base.h:759
Type representing an arbitrary unit.
Definition: base.h:886