40#if !defined(DISABLE_PREDEFINED_UNITS) || \
41 defined(ENABLE_PREDEFINED_FREQUENCY_UNITS)
43 frequency, hertz, hertz, Hz,
49using namespace frequency;
#define UNIT_ADD_CATEGORY_TRAIT(unitCategory)
Macro to create the is_category_unit type trait.
Definition: base.h:369
Unit Conversion Library namespace.
Definition: data.h:31
UNIT_ADD_WITH_METRIC_PREFIXES(solid_angle, steradian, steradians, sr, unit< std::ratio< 1 >, units::category::solid_angle_unit >) UNIT_ADD(solid_angle
Class representing SI base unit types.
Definition: base.h:757
Type representing an arbitrary unit.
Definition: base.h:884