ACE::Value_Ptr< T > Class Template Reference

Smart pointer implementation designed for use as a class member. More...

#include <Value_Ptr.h>

Public Member Functions
	Value_Ptr (T *p=0)
	Constructor. More...
	~Value_Ptr (void)
	Destructor. More...
T &	operator* (void) const
	Deference operator. More...
T *	operator-> (void) const
	Pointer operator. More...
void	swap (Value_Ptr &other)
	Value_Ptr (Value_Ptr const &other)
	Copy constructor. More...
Value_Ptr &	operator= (Value_Ptr const &other)
	Assignment operator. More...
template<typename U >
	Value_Ptr (Value_Ptr< U > const &other)
	Converting copy constructor. More...
template<typename U >
Value_Ptr &	operator= (Value_Ptr< U > const &other)
	Converting assignment operator. More...

Private Member Functions
template<typename U >
T *	create_from (U const *p) const
	Copying method invoked when copy constructing. More...

Private Attributes
T *	p_
	Object owned by this Value_Ptr. More...

Friends
template<typename U >
class	Value_Ptr

Detailed Description

template<typename T>
class ACE::Value_Ptr< T >

Smart pointer implementation designed for use as a class member.

Using a std::auto_ptr<> as a class member is sometimes problematic since ownership of memory is transferred when copying such members. This Value_Ptr class is explicitly designed to avoid such problems by performing copies of the underlying object rather than transfer ownership. This, for example, allows it to be readily used as a member in classes placed inside STL containers.

See also

Item 31 in "More Exceptional C++" by Herb Sutter.

Constructor & Destructor Documentation

template<typename T >

ACE::Value_Ptr< T >::Value_Ptr ( T *  p = 0 )

inlineexplicit

Constructor.

template<typename T >

ACE::Value_Ptr< T >::~Value_Ptr ( void  )

inline

Destructor.

template<typename T >

ACE::Value_Ptr< T >::Value_Ptr ( Value_Ptr< T > const &  other )

inline

Copy constructor.

template<typename T >

template<typename U >

ACE::Value_Ptr< T >::Value_Ptr ( Value_Ptr< U > const &  other )

inline

Converting copy constructor.

Member Function Documentation

template<typename T >

template<typename U >

T* ACE::Value_Ptr< T >::create_from ( U const *  p ) const

inlineprivate

Copying method invoked when copy constructing.

template<typename T >

T& ACE::Value_Ptr< T >::operator* ( void  ) const

inline

Deference operator.

template<typename T >

T* ACE::Value_Ptr< T >::operator-> ( void  ) const

inline

Pointer operator.

template<typename T >

Value_Ptr& ACE::Value_Ptr< T >::operator= ( Value_Ptr< T > const &  other )

inline

Assignment operator.

template<typename T >

template<typename U >

Value_Ptr& ACE::Value_Ptr< T >::operator= ( Value_Ptr< U > const &  other )

inline

Converting assignment operator.

template<typename T >

void ACE::Value_Ptr< T >::swap ( Value_Ptr< T > &  other )

inline

Non-throwing swap operation used to make assignment strongly exception-safe.

Note

As implemented, the swap operation may not work correctly for auto_ptr<>s, but why would one use an auto_ptr<> as the template argument for this particular template class!?

Friends And Related Function Documentation

template<typename T >

template<typename U >

friend class Value_Ptr

friend

Member Data Documentation

template<typename T >

T* ACE::Value_Ptr< T >::p_

private

Object owned by this Value_Ptr.

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

• Value_Ptr.h