In addition to the handle-body and singleton patterns, the Smart Pointer package contains three lower-level smart pointer classes that you can use to create your own higher-level abstractions. These template classes all provide exception-safe dynamic memory allocation. In addition:

Each of these classes is an abstraction that simplifies the use of pointers referring to objects on the heap. The pointed-to object is called the pointer’s body. The pointer class’s Body template parameter specifies the type of object to which this pointer can refer.