< cpp‎ | memory
Dynamic memory management
Uninitialized storage
Garbage collection support
C Library
Low level memory management
Defined in header <memory>
template< class T > class auto_ptr;
(1) (deprecated in C++11)
(removed in C++17)
template<> class auto_ptr<void>;
(2) (deprecated in C++11)
(removed in C++17)

auto_ptr is a smart pointer that manages an object obtained via new expression and deletes that object when auto_ptr itself is destroyed. It may be used to provide exception safety for dynamically-allocated objects, for passing ownership of dynamically-allocated objects into functions and for returning dynamically-allocated objects from functions.

Copying an auto_ptr copies the pointer and transfers ownership to the destination: both copy construction and copy assignment of auto_ptr modify their right hand arguments, and the "copy" is not equal to the original. Because of these unusual copy semantics, auto_ptr may not be placed in standard containers. std::unique_ptr is preferred for this and other uses. (since C++11)

2) Specialization for type void is provided, it declares the typedef element_type, but no member functions.

An additional class template auto_ptr_ref is referred to throughout the documentation. It is an implementation-defined type that holds a reference to auto_ptr. The implementation is allowed to provide the template with a different name or implement the functions returning it or accepting it as parameter in other ways.


[edit] Member types

Member type Definition
element_type T

[edit] Member functions

creates a new auto_ptr
(public member function) [edit]
destroys an auto_ptr and the managed object
(public member function) [edit]
transfers ownership from another auto_ptr
(public member function) [edit]
converts the managed pointer to a pointer to different type
(public member function) [edit]
returns a pointer to the managed object
(public member function) [edit]
accesses the managed object
(public member function) [edit]
replaces the managed object
(public member function) [edit]
releases ownership of the managed object
(public member function) [edit]