NAME¶

std::weak_ptr::operator= - std::weak_ptr::operator=

Synopsis¶

weak_ptr& operator=( const weak_ptr& r ) noexcept; (1) (since C++11)
template< class Y > (2) (since C++11)
weak_ptr& operator=( const weak_ptr<Y>& r ) noexcept;
template< class Y > (3) (since C++11)
weak_ptr& operator=( const shared_ptr<Y>& r ) noexcept;
weak_ptr& operator=( weak_ptr&& r ) noexcept; (4) (since C++11)
template< class Y > (5) (since C++11)
weak_ptr& operator=( weak_ptr<Y>&& r ) noexcept;

Replaces the managed object with the one managed by r. The object is shared with r.
If r manages no object, *this manages no object too.

1-3) Equivalent to std::weak_ptr<T>(r).swap(*this).
4,5) Equivalent to std::weak_ptr<T>(std::move(r)).swap(*this).

Parameters¶

r - smart pointer to share an object with

Return value¶

*this

Notes¶

The implementation may meet the requirements without creating a temporary weak_ptr
object.

Defect reports

The following behavior-changing defect reports were applied retroactively to
previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 2315 C++11 move semantic was not enabled for weak_ptr enabled

See also¶

constructor creates a new weak_ptr
(public member function)
swap swaps the managed objects
(public member function)