NAME¶

std::experimental::weak_ptr - std::experimental::weak_ptr

Synopsis¶

Defined in header <experimental/memory>
template< class T > class weak_ptr; (library fundamentals TS)

std::experimental::weak_ptr is a modified version of std::weak_ptr that
interoperates with std::experimental::shared_ptr and has support for arrays.

Member types¶

Member type Definition
element_type std::remove_extent_t<T>

Member functions¶

constructor constructs new weak_ptr
(public member function)

Members and non-members identical to std::weak_ptr

Member functions¶

The following member functions work with std::experimental::shared_ptr instead of
std::shared_ptr and std::experimental::weak_ptr instead of std::weak_ptr. The
behavior is otherwise identical.

destructor destroys a weak_ptr
(public member function of std::weak_ptr<T>)
operator= assigns the weak_ptr
(public member function of std::weak_ptr<T>)

Modifiers¶

reset releases the ownership of the managed object
(public member function of std::weak_ptr<T>)
swap swaps the managed objects
(public member function of std::weak_ptr<T>)

Observers¶

use_count returns the number of shared_ptr objects that manage the object
(public member function of std::weak_ptr<T>)
expired checks whether the referenced object was already deleted
(public member function of std::weak_ptr<T>)
lock creates a shared_ptr that manages the referenced object
(public member function of std::weak_ptr<T>)
owner_before provides owner-based ordering of weak pointers
(public member function of std::weak_ptr<T>)

Non-member functions¶

This non-member function is declared in the std::experimental namespace, and work
with std::experimental::weak_ptr rather than std::weak_ptr, but otherwise behaves
identically to the corresponding C++14 function.

std::swap(std::weak_ptr) specializes the std::swap algorithm
(C++11) (function template)

Example¶

This section is incomplete
Reason: no example