Unit Types

Defines a series of classes which contain dimensioned values. More...

Macros
#define	MSVC_EBO
	Describes objects that represent quantities of a given unit.

Functions
template<UnitType UnitType, ArithmeticType T> requires detail::is_losslessly_convertible<T, typename UnitType::underlying_type>
constexpr UnitType	units::make_unit (const T value) noexcept
	Constructs a unit container from an arithmetic type.

Detailed Description

Defines a series of classes which contain dimensioned values.

Unit types store a value, and support various arithmetic operations.

Macro Definition Documentation

MSVC_EBO

#define MSVC_EBO

Describes objects that represent quantities of a given unit.

Stores a value which represents a quantity in the given units. Units (except dimensionless units) are not convertible to arithmetic types, in order to provide type safety in dimensional analysis. Units are implicitly convertible to other units types of the same dimension, if such conversion is lossless. Units support various types of arithmetic operations, depending on their scale type.

The value of an unit can only be set on construction, or changed by assignment from another unit type. If necessary, the underlying value can be accessed using raw():

meter_t m(5.0);
double val = m.raw(); // val == 5.0 

.

Template Parameters

ConversionFactor	conversion_factor of the represented unit (e.g. meters)
T	underlying type of the storage. Defaults to UNIT_LIB_DEFAULT_TYPE.
NumericalScale	optional scale class for the units. Defaults to linear (i.e. does not scale the unit value). Examples of non-linear scales could be logarithmic, decibel, or richter scales. Numerical scales must adhere to the numerical-scale concept, i.e. is_numerical_scale_v<...> must be true.

See also

• length units
• mass units
• time units
• angle units
• current units
• temperature units
• substance units
• luminous intensity units
• solid angle units
• frequency units
• velocity units
• angular velocity units
• acceleration units
• force units
• pressure units
• charge units
• energy units
• power units
• voltage units
• capacitance units
• impedance units
• magnetic flux units
• magnetic field strength units
• inductance units
• luminous flux units
• illuminance units
• radiation units
• torque units
• area units
• volume units
• density units
• concentration units
• constant units

Function Documentation

make_unit()

template<UnitType UnitType, ArithmeticType T>
requires detail::is_losslessly_convertible<T, typename UnitType::underlying_type>

UnitType units::make_unit ( const T value )

constexprnoexcept

Constructs a unit container from an arithmetic type.

make_unit can be used to construct a unit container from an arithmetic type, as an alternative to using the explicit constructor. Unlike the explicit constructor it forces the user to explicitly specify the units.

Template Parameters

UnitType	Type to construct.
T	Arithmetic type.

Parameters

[in]

value

Arithmetic value that represents a quantity in units of UnitType.