std::experimental::weak_ptr<T>::weak_ptr (3) - Linux Man Pages

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

NAME

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>)