std::experimental::weak_ptr::weak_ptr(3)

NAME
std::experimental::weak_ptr::weak_ptr - std::experimental::weak_ptr::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
   weak_ptr( const weak_ptr<Y>& r ) noexcept; TS)
   template< class Y > (library fundamentals
   weak_ptr( const std::experimental::shared_ptr<Y>& r ) (2) TS)
   noexcept;
   weak_ptr( weak_ptr&& r ) noexcept; (3) (library fundamentals
                        TS)
   template< class Y > (3) (library fundamentals
   weak_ptr( weak_ptr<Y>&& r ) noexcept; TS)
   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
   constructor creates a new weak_ptr
                 (public member function of std::weak_ptr<T>)
   operator= assigns the weak_ptr
                 (public member function of std::weak_ptr<T>)

Categories:
     * Noindexed pages
     * unconditionally noexcept
     * Todo no example