Replaces owned resource.
weak_ptr& operator=(const weak_ptr& wp);
template<class Other>
weak_ptr& operator=(const weak_ptr<Other>& wp);
template<class Other>
weak_ptr& operator=(const shared_ptr<Other>& sp);
Parameters
Other
The type controlled by the argument shared/weak pointer.wp
The weak pointer to copy.sp
The shared pointer to copy.
Remarks
The operators all release the resource currently pointed to by *this and assign ownership of the resource named by the operand sequence to *this. If an operator fails it leaves *this unchanged.
Example
// std_tr1__memory__weak_ptr_operator_as.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
int main()
{
std::shared_ptr<int> sp0(new int(5));
std::weak_ptr<int> wp0(sp0);
std::cout << "*wp0.lock() == " << *wp0.lock() << std::endl;
std::shared_ptr<int> sp1(new int(10));
wp0 = sp1;
std::cout << "*wp0.lock() == " << *wp0.lock() << std::endl;
std::weak_ptr<int> wp1;
wp1 = wp0;
std::cout << "*wp1.lock() == " << *wp1.lock() << std::endl;
return (0);
}
*wp0.lock() == 5 *wp0.lock() == 10 *wp1.lock() == 10
Requirements
Header: <memory>
Namespace: std