boost::units::base_dimension< Derived, N, class > Class Template Reference

Defines a base dimension. More...

#include <base_dimension.hpp>

Inheritance diagram for boost::units::base_dimension< Derived, N, class >:

Collaboration diagram for boost::units::base_dimension< Derived, N, class >:

Public Types
typedef base_dimension	this_type
	INTERNAL ONLY. More...
typedef list< dim< Derived, static_rational < 1 > >, dimensionless_type >	dimension_type
	A convenience typedef. Equivalent to boost::units::derived_dimension<Derived,1>::type. More...
typedef Derived	type
	Provided for mpl compatability. More...

Friends
Derived *	check_double_register (const units::base_dimension_ordinal< N > &)
	Check for C++0x. More...
detail::yes	boost_units_is_registered (const units::base_dimension_ordinal< N > &)
	Register this ordinal INTERNAL ONLY. More...
detail::yes	boost_units_is_registered (const units::base_dimension_pair< Derived, N > &)
	But make sure we can identify the current instantiation! INTERNAL ONLY. More...

Detailed Description

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>
class boost::units::base_dimension< Derived, N, class >

Defines a base dimension.

To define a dimension you need to provide the derived class (CRTP) and a unique integer.

struct my_dimension : boost::units::base_dimension<my_dimension, 1> {};

It is designed so that you will get an error message if you try to use the same value in multiple definitions.

Member Typedef Documentation

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>

typedef list<dim<Derived,static_rational<1> >, dimensionless_type> boost::units::base_dimension< Derived, N, class >::dimension_type

A convenience typedef. Equivalent to boost::units::derived_dimension<Derived,1>::type.

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>

typedef base_dimension boost::units::base_dimension< Derived, N, class >::this_type

INTERNAL ONLY.

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>

typedef Derived boost::units::base_dimension< Derived, N, class >::type

Provided for mpl compatability.

Friends And Related Function Documentation

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>

detail::yes boost_units_is_registered ( const units::base_dimension_ordinal< N > &  )

friend

Register this ordinal INTERNAL ONLY.

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>

detail::yes boost_units_is_registered ( const units::base_dimension_pair< Derived, N > &  )

friend

But make sure we can identify the current instantiation! INTERNAL ONLY.

template<class Derived, long N, class = typename detail::ordinal_has_already_been_defined< check_base_dimension<Derived, N>::value >::type>

Derived* check_double_register ( const units::base_dimension_ordinal< N > &  )

friend

Check for C++0x.

In C++0x, we have to have identical arguments but a different return type to trigger an error. Note that this is only needed for clang as check_base_dimension will trigger an error earlier for compilers with less strict name lookup. INTERNAL ONLY

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The documentation for this class was generated from the following file:

• boost_1_57_0/boost/units/base_dimension.hpp