std::weak_ptr<T>::operator=

// 1)
weak_ptr& operator=( const weak_ptr& r ) noexcept;
// 2)
template< class Y >
weak_ptr& operator=( const weak_ptr<Y>& r ) noexcept;
// 3)
template< class Y >
weak_ptr& operator=( const shared_ptr<Y>& r ) noexcept;
// 4)
weak_ptr& operator=( weak_ptr&& r ) noexcept;
// 5)
template< class Y >
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.

Defect reports	Applied to	Behavior as published	Correct behavior
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.	C++11	move semantic was not enabled for weak_ptr	enabled