boost::aux::variant_ref< T, TagT > Class Template Reference

Attribute value reference implementation for multiple types case. More...

#include <value_ref.hpp>

Public Types
typedef T	value_type
	Referenced value type. More...
typedef TagT	tag_type
	Tag type. More...

Public Member Functions
void	reset () BOOST_NOEXCEPT
	Resets the reference. More...
template<typename U >
enable_if< is_compatible< U > , const U * >::type	get_ptr () const BOOST_NOEXCEPT
	Returns a pointer to the referred value. More...
template<typename U >
enable_if< is_compatible< U > , U const & >::type	get () const BOOST_NOEXCEPT
	Returns a reference to the value. More...
unsigned int	which () const BOOST_NOEXCEPT
	Returns the stored type index. More...
void	swap (variant_ref &that) BOOST_NOEXCEPT
	Swaps two reference wrappers. More...
template<typename VisitorT >
VisitorT::result_type	apply_visitor (VisitorT visitor) const
	Applies a visitor function object to the referred value. More...
template<typename VisitorT >
enable_if< is_void< typename VisitorT::result_type >, bool > ::type	apply_visitor_optional (VisitorT visitor) const
	Applies a visitor function object to the referred value. More...
template<typename VisitorT >
disable_if< is_void< typename VisitorT::result_type > , optional< typename VisitorT::result_type > >::type	apply_visitor_optional (VisitorT visitor) const
	Applies a visitor function object to the referred value. More...
template<typename VisitorT , typename DefaultT >
VisitorT::result_type	apply_visitor_or_default (VisitorT visitor, DefaultT &def_val) const
	Applies a visitor function object to the referred value or returns a default value. More...
template<typename VisitorT , typename DefaultT >
VisitorT::result_type	apply_visitor_or_default (VisitorT visitor, DefaultT const &def_val) const
	Applies a visitor function object to the referred value or returns a default value. More...

Protected Types
template<typename U >
using	is_compatible = mpl::contains< value_type, U >
	The metafunction tests if the type is compatible with the reference wrapper. More...

Protected Member Functions
	variant_ref () BOOST_NOEXCEPT
	Default constructor. More...
template<typename U >
	variant_ref (const U *p) BOOST_NOEXCEPT
	Initializing constructor. More...

Protected Attributes
const void *	m_ptr
	Pointer to the value. More...
unsigned int	m_type_idx
	Type index. More...

Detailed Description

template<typename T, typename TagT>
class boost::aux::variant_ref< T, TagT >

Attribute value reference implementation for multiple types case.

Member Typedef Documentation

template<typename T , typename TagT >

template<typename U >

using boost::aux::variant_ref< T, TagT >::is_compatible = mpl::contains< value_type, U >

protected

The metafunction tests if the type is compatible with the reference wrapper.

template<typename T , typename TagT >

typedef TagT boost::aux::variant_ref< T, TagT >::tag_type

Tag type.

template<typename T , typename TagT >

typedef T boost::aux::variant_ref< T, TagT >::value_type

Referenced value type.

Constructor & Destructor Documentation

template<typename T , typename TagT >

boost::aux::variant_ref< T, TagT >::variant_ref ( )

inlineprotected

Default constructor.

template<typename T , typename TagT >

template<typename U >

boost::aux::variant_ref< T, TagT >::variant_ref ( const U *  p )

inlineexplicitprotected

Initializing constructor.

Member Function Documentation

template<typename T , typename TagT >

template<typename VisitorT >

VisitorT::result_type boost::aux::variant_ref< T, TagT >::apply_visitor ( VisitorT  visitor ) const

inline

Applies a visitor function object to the referred value.

References BOOST_ASSERT.

template<typename T , typename TagT >

template<typename VisitorT >

enable_if< is_void< typename VisitorT::result_type >, bool >::type boost::aux::variant_ref< T, TagT >::apply_visitor_optional ( VisitorT  visitor ) const

inline

Applies a visitor function object to the referred value.

template<typename T , typename TagT >

template<typename VisitorT >

disable_if< is_void< typename VisitorT::result_type >, optional< typename VisitorT::result_type > >::type boost::aux::variant_ref< T, TagT >::apply_visitor_optional ( VisitorT  visitor ) const

inline

Applies a visitor function object to the referred value.

template<typename T , typename TagT >

template<typename VisitorT , typename DefaultT >

VisitorT::result_type boost::aux::variant_ref< T, TagT >::apply_visitor_or_default ( VisitorT  visitor, DefaultT &  def_val  ) const

inline

Applies a visitor function object to the referred value or returns a default value.

template<typename T , typename TagT >

template<typename VisitorT , typename DefaultT >

VisitorT::result_type boost::aux::variant_ref< T, TagT >::apply_visitor_or_default ( VisitorT  visitor, DefaultT const &  def_val  ) const

inline

Applies a visitor function object to the referred value or returns a default value.

template<typename T , typename TagT >

template<typename U >

enable_if< is_compatible< U >, U const& >::type boost::aux::variant_ref< T, TagT >::get ( ) const

inline

Returns a reference to the value.

References BOOST_ASSERT, and boost::multiprecision::backends::p.

template<typename T , typename TagT >

template<typename U >

enable_if< is_compatible< U >, const U* >::type boost::aux::variant_ref< T, TagT >::get_ptr ( ) const

inline

Returns a pointer to the referred value.

References boost::aux::variant_ref< T, TagT >::m_ptr.

template<typename T , typename TagT >

void boost::aux::variant_ref< T, TagT >::reset ( void  )

inline

Resets the reference.

template<typename T , typename TagT >

void boost::aux::variant_ref< T, TagT >::swap ( variant_ref< T, TagT > &  that )

inline

Swaps two reference wrappers.

References boost::aux::variant_ref< T, TagT >::m_ptr, boost::aux::variant_ref< T, TagT >::m_type_idx, and boost::multiprecision::backends::p.

template<typename T , typename TagT >

unsigned int boost::aux::variant_ref< T, TagT >::which ( ) const

inline

Returns the stored type index.

References boost::aux::variant_ref< T, TagT >::m_type_idx.

Member Data Documentation

template<typename T , typename TagT >

const void* boost::aux::variant_ref< T, TagT >::m_ptr

protected

Pointer to the value.

Referenced by boost::aux::variant_ref< T, TagT >::get_ptr(), and boost::aux::variant_ref< T, TagT >::swap().

template<typename T , typename TagT >

unsigned int boost::aux::variant_ref< T, TagT >::m_type_idx

protected

Type index.

Referenced by boost::aux::variant_ref< T, TagT >::swap(), and boost::aux::variant_ref< T, TagT >::which().

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

• boost_1_57_0/boost/log/utility/value_ref.hpp