40#if !defined(DISABLE_PREDEFINED_UNITS) || defined(ENABLE_PREDEFINED_TIME_UNITS)
49 unit<
std::ratio<31557600>, seconds>)
50UNIT_ADD(time, gregorian_year, gregorian_years, a_g,
51 unit<
std::ratio<31556952>, seconds>)
#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
UnitTypeLhs() min(const UnitTypeLhs &lhs, const UnitTypeRhs &rhs)
Definition: base.h:3411
Unit Conversion Library namespace.
Definition: concentration.h:31
UNIT_ADD(concentration, ppm, parts_per_million, ppm, unit< std::ratio< 1, 1000000 >, units::category::scalar_unit >) UNIT_ADD(concentration
julian_years
Definition: time.h:48
julian_year
Definition: time.h:48
UNIT_ADD_WITH_METRIC_PREFIXES(voltage, volt, volts, V, unit< std::ratio< 1 >, units::category::voltage_unit >) UNIT_ADD(voltage
Class representing SI base unit types.
Definition: base.h:759
Type representing an arbitrary unit.
Definition: base.h:886