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 ()
Delete this reference to the object. 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.