NAME¶

std::auto_ptr - std::auto_ptr

Synopsis¶

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.

Member types¶

Member type Definition
element_type T

Member functions¶

constructor creates a new auto_ptr
(public member function)
destructor destroys an auto_ptr and the managed object
(public member function)
operator= transfers ownership from another auto_ptr
(public member function)
operator auto_ptr<Y> converts the managed pointer to a pointer to different type
operator auto_ptr_ref<Y> (public member function)

Observers¶

get returns a pointer to the managed object
(public member function)
operator* accesses the managed object
operator-> (public member function)

Modifiers¶

reset replaces the managed object
(public member function)
release releases ownership of the managed object
(public member function)