std::experimental::weak_ptr::weak_ptr (3) Linux Manual Page

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

Synopsis

constexpr weak_ptr() noexcept;
(1)(library fundamentals TS)

    weak_ptr(const weak_ptr &r) noexcept;
(2)(library fundamentals TS)

    template <class Y>
    (2)(library fundamentals TS)

        weak_ptr(const weak_ptr<Y> &r) noexcept;

template <class Y>
(2)(library fundamentals TS)

    weak_ptr(const std::experimental::shared_ptr<Y> &r) noexcept;

weak_ptr(weak_ptr &&r) noexcept;
(3)(library fundamentals TS)

    template <class Y>
    (3)(library fundamentals TS)

        weak_ptr(weak_ptr<Y> &&r) noexcept;

Constructs a new weak_ptr that potentially shares an object with r.
1) Default constructor. Constructs empty weak_ptr.
2) Constructs new weak_ptr which shares an object managed by r. If r manages no object, *this manages no object too. The templated overloads don’t participate in overload resolution unless either Y* is implicitly convertible to T*, or Y is the type "array of N U" for some type U and some number N, and T is the type "array of unknown bound of (possibly cv-qualified) U".
3) Move constructors. Moves a weak_ptr instance from r into *this. After this, r is empty and r.use_count()==0. The templated overload doesn’t participate in overload resolution unless either Y* is implicitly convertible to T*, or Y is the type "array of N U" for some type U and some number N, and T is the type "array of unknown bound of (possibly cv-qualified) U".

Parameters

r – a std::experimental::shared_ptr or std::experimental::weak_ptr that will be viewed by this std::experimental::weak_ptr

Exceptions

noexcept specification:
noexcept

Example

 This section is incomplete
 Reason: no example

See also

creates a new weak_ptr

constructor   (public member function of std::weak_ptr<T>)
assigns the weak_ptr

operator=     (public member function of std::weak_ptr<T>)