std::experimental::weak_ptr

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Experimental

Technical Specification
Filesystem library(filesystem TS)
Library fundamentals(library fundamentals TS)
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Library fundamentals

experimental::optional
experimental::any
experimental::basic_string_view
experimental::sample
experimental::shared_ptr
experimental::weak_ptr
experimental::apply
experimental::invocation_typeexperimental::raw_invocation_type
experimental::search
experimental::default_searcherexperimental::make_default_searcher
experimental::boyer_moore_searcherexperimental::make_boyer_moore_searcher
experimental::boyer_moore_horspool_searcherexperimental::make_boyer_moore_horspool_searcher
Type-erased and polymorphic allocators
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std::experimental::weak_ptr

weak_ptr::weak_ptr
Members and non-members identical to those of`std::weak_ptr`

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

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

[edit]Member types

Member type	Definition
element_type	std::remove_extent_t<T>

[edit]Member functions

(constructor)

constructs newweak_ptr
(public member function)[edit]

Members and non-members identical tostd::weak_ptr

Member functions

The following member functions work withstd::experimental::shared_ptr instead ofstd::shared_ptr andstd::experimental::weak_ptr instead ofstd::weak_ptr. The behavior is otherwise identical.

(destructor)	destroys a`weak_ptr` (public member function of`std::weak_ptr<T>`)[edit]
operator=	assigns the`weak_ptr` (public member function of`std::weak_ptr<T>`)[edit]
Modifiers
reset	releases the ownership of the managed object (public member function of`std::weak_ptr<T>`)[edit]
swap	swaps the managed objects (public member function of`std::weak_ptr<T>`)[edit]
Observers
use_count	returns the number of`shared_ptr` objects that manage the object (public member function of`std::weak_ptr<T>`)[edit]
expired	checks whether the referenced object was already deleted (public member function of`std::weak_ptr<T>`)[edit]
lock	creates a`shared_ptr` that manages the referenced object (public member function of`std::weak_ptr<T>`)[edit]
owner_before	provides owner-based ordering of weak pointers (public member function of`std::weak_ptr<T>`)[edit]

Non-member functions

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

std::swap(std::weak_ptr)

(C++11)

specializes thestd::swap algorithm
(function template)[edit]