ACE::Value_Ptr< T > Class Template Reference

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

#include <Value_Ptr.h>

Collaboration diagram for ACE::Value_Ptr< T >:

Collaboration graph
[legend]

List of all members.

Public Member Functions

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

Private Member Functions

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

Private Attributes

T * p_
 Object owned by this Value_Ptr.

Friends

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  )  [inline, explicit]

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>
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>
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!?

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>
template<typename U>
T* ACE::Value_Ptr< T >::create_from ( U const *  p  )  const [inline, private]

Copying method invoked when copy constructing.


Friends And Related Function Documentation

template<typename T>
friend class Value_Ptr [friend]


Member Data Documentation

template<typename T>
T* ACE::Value_Ptr< T >::p_ [private]

Object owned by this Value_Ptr.


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

Generated on Wed Apr 23 02:44:04 2008 for ACE by  doxygen 1.5.5