std::experimental::weak_ptr<T>::weak_ptr

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Experimental

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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
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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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constexpr weak_ptr()noexcept;	(1)	(library fundamentals TS)
weak_ptr(const weak_ptr& r)noexcept;	(2)	(library fundamentals TS)
template<class Y> weak_ptr(const weak_ptr<Y>& r)noexcept;	(2)	(library fundamentals TS)
template<class Y> weak_ptr(conststd::experimental::shared_ptr<Y>& r)noexcept;	(2)	(library fundamentals TS)
weak_ptr( weak_ptr&& r)noexcept;	(3)	(library fundamentals TS)
template<class Y> weak_ptr( weak_ptr<Y>&& r)noexcept;	(3)	(library fundamentals TS)

Constructs a newweak_ptr that potentially shares an object withr.

1) Default constructor. Constructs emptyweak_ptr.

2) Constructs newweak_ptr which shares an object managed byr. Ifr manages no object,*this manages no object too. The templated overloads don't participate in overload resolution unless eitherY* is implicitly convertible toT*, orY is the type "array ofNU" for some typeU and some numberN, andT is the type "array of unknown bound of (possibly cv-qualified)U".

3) Move constructors. Moves aweak_ptr instance fromr into*this. After this,r is empty andr.use_count()==0. The templated overload doesn't participate in overload resolution unless eitherY* is implicitly convertible toT*, orY is the type "array ofNU" for some typeU and some numberN, andT is the type "array of unknown bound of (possibly cv-qualified)U".

[edit]Parameters

astd::experimental::shared_ptr orstd::experimental::weak_ptr that will be viewed by thisstd::experimental::weak_ptr

[edit]Exceptions

noexcept specification:

noexcept

[edit]Example

This section is incomplete
Reason: no example

[edit]See also

(constructor)	creates a new`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]