sc::Ref<; T >(3) MPQC sc::Ref< T >(3)
NAME
sc::Ref< T > - A template class that maintains references counts.
SYNOPSIS
#include <ref.h>
Inherits sc::RefBase.
Public Member Functions
Ref ()
Create a reference to a null object.
Ref (T *a)
Create a reference to the object a.
Ref (const Ref< T > &a)
Create a reference to the object referred to by a.
template<class A > Ref (const Ref< A > &a)
Create a reference to the object referred to by a.
~Ref ()
Create a reference to the object a.
T * operator-> () const
Returns the reference counted object.
T * pointer () const
Returns a pointer the reference counted object.
RefCount * parentpointer () const
Implements the parentpointer pure virtual in the base class.
operator T * () const
T & operator* () const
Returns a C++ reference to the reference counted object.
int null () const
Return 1 if this is a reference to a null object.
int nonnull () const
Return !null().
template<class A > int operator== (const Ref< A > &a) const
A variety of ordering and equivalence operators are provided using
the Identity class.
template<class A > int operator>= (const Ref< A > &a) const
template<class A > int operator<= (const Ref< A > &a) const
template<class A > int operator> (const Ref< A > &a) const
template<class A > int operator< (const Ref< A > &a) const
template<class A > int operator!= (const Ref< A > &a) const
int compare (const Ref< T > &a) const
Compare two objects returning -1, 0, or 1.
void clear ()
Refer to the null object.
Ref< T > & operator= (const Ref< T > &c)
Assignment to c.
template<class A > Ref< T > & operator= (const Ref< A > &c)
Assignment to c.
Ref< T > & operator<< (const RefBase &a)
Assignment to the object that a references using dynamic_cast.
Ref< T > & operator<< (RefCount *a)
Assigns to the given base class pointer using dynamic_cast.
Ref< T > & operator= (T *cr)
Assignment to cr.
void assign_pointer (T *cr)
Assignment to cr.
void check_pointer () const
Check the validity of the pointer.
void ref_info (std::ostream &os) const
Print information about the reference to os.
void warn (const char *s) const
Print a warning concerning the reference.
Additional Inherited Members
Detailed Description
template<class T>class sc::Ref< T >
A template class that maintains references counts.
Several of these operations can cause a reference to an object to be
replaced by a reference to a different object. If a reference to a
nonnull object is eliminated, the object's reference count is
decremented and the object is deleted if the reference count becomes
zero.
There also may be a to convert to T*, where T is the type of the object
which Ref references. Some compilers have bugs that prevent the use of
operator T*(). The pointer() member should be used instead.
Constructor & Destructor Documentation
template<class T> sc::Ref< T >::~Ref () [inline]
Create a reference to the object a. Do a dynamic_cast to convert a to
the appropiate type. Create a reference to the object a. Do a
dynamic_cast to convert a to the appropiate type. Delete this reference
to the object. Decrement the object's reference count and delete the
object if the count is zero.
Member Function Documentation
template<class T> int sc::Ref< T >::compare (const Ref< T > & a) const
[inline]
Compare two objects returning -1, 0, or 1. Similar to the C library
routine strcmp.
template<class T> int sc::Ref< T >::null () const [inline]
Return 1 if this is a reference to a null object. Otherwise return 0.
template<class T> T& sc::Ref< T >::operator* () const [inline]
Returns a C++ reference to the reference counted object. The behaviour
is undefined if the object is null.
template<class T> T* sc::Ref< T >::operator-> () const [inline]
Returns the reference counted object. The behaviour is undefined if the
object is null.
template<class T> Ref<T>& sc::Ref< T >::operator<< (RefCount * a) [inline]
Assigns to the given base class pointer using dynamic_cast. If the
dynamic_cast fails and the argument is nonnull and has a reference
count of zero, then it is deleted.
template<class T> template<class A > int sc::Ref< T >::operator== (const
Ref< A > & a) const [inline]
A variety of ordering and equivalence operators are provided using the
Identity class.
Author
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Version 2.3.1 Fri Feb 19 2016 sc::Ref< T >(3)
