Constants.hpp File Reference

#include "ConversionConstants.hpp"
#include "Names.hpp"
#include "UnitSystem.hpp"
#include "details/utils.hpp"
#include <stdexcept>

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Classes
struct	shamunits::Constants< T >
	Physical constants. More...
struct	shamunits::Constants< T >::Si
	Physical constant in SI units. More...

Namespaces
namespace	shamunits
	namespace containing the units library

Macros
#define	addconstant(name)
	Macro to add a constant to the shamunits::Constants class For example one can add a new constant by adding the following statement inside shamunits::Constants.
#define	Uget(unitname, mult_pow)
	Utility macro to get the value of a unit in the current unit system with its power.
#define	Cget(constant_name, mult_pow)
	Utility macro to get the value of a constant in the current unit system with its power.
#define	UNITS_CONSTANTS
	X macro to list all constants conversion & bindings.
#define	X(name, conv)
	Define the constant conversions functions.

Variables
template<class T>
constexpr T	shamunits::pi = 3.141592653589793116
	Value of pi Usage : auto pi = shamunits::pi<T>;.
template<class T>
constexpr T	shamunits::fine_structure = 0.0072973525693
	Fine structure constant.
template<class T>
constexpr T	shamunits::proton_electron_ratio = 1836.1526734311
	Mass ration between the proton and electron.
template<class T>
constexpr T	shamunits::electron_proton_ratio = 1 / proton_electron_ratio<T>
	Mass ration between the electron and proton.

Detailed Description

Author

David Fang (david.nosp@m..fan.nosp@m.g@ikm.nosp@m.ail..nosp@m.com)

Timothée David–Cléris (tim.s.nosp@m.hamr.nosp@m.ock@p.nosp@m.roto.nosp@m.n.me)

Yona Lapeyre (yona..nosp@m.lape.nosp@m.yre@e.nosp@m.ns-l.nosp@m.yon.f.nosp@m.r)

Definition in file Constants.hpp.

Macro Definition Documentation

addconstant

#define addconstant

(

name

)

Value:

    template<int power = 1>                                                                        \
    inline constexpr T name()

Macro to add a constant to the shamunits::Constants class For example one can add a new constant by adding the following statement inside shamunits::Constants.

addconstant(delta_nu_cs) { return Cget(Si::delta_nu_cs,1) * Uget(Hertz, 1); }

Definition at line 32 of file Constants.hpp.

Cget

#define Cget	(		constant_name,
			mult_pow )

Value:

    details::pow_constexpr_fast_inv<(mult_pow) * power>(constant_name, 1 / constant_name)

Utility macro to get the value of a constant in the current unit system with its power.

Definition at line 40 of file Constants.hpp.

Uget

#define Uget	(		unitname,
			mult_pow )

Value:

units.template get<None, units::unitname, (mult_pow) * power>()

Utility macro to get the value of a unit in the current unit system with its power.

Definition at line 37 of file Constants.hpp.

UNITS_CONSTANTS

#define UNITS_CONSTANTS

X macro to list all constants conversion & bindings.

Definition at line 44 of file Constants.hpp.

X

#define X	(		name,
			conv )

Value:

    addconstant(name) { return Cget(Si::name, 1) * conv; }

Define the constant conversions functions.

Definition at line 173 of file Constants.hpp.