bad_weak_ptr Class
The latest version of this topic can be found at bad_weak_ptr Class.
Reports bad weak_ptr exception.
Syntax
class bad_weak_ptr
: public std::exception {
public:
bad_weak_ptr();
const char *what() throw();
};
Remarks
The class describes an exception that can be thrown from the shared_ptr Class constructor that takes an argument of type weak_ptr Class. The member function what returns "bad_weak_ptr".
Example
// std_tr1__memory__bad_weak_ptr.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
int main()
{
std::weak_ptr<int> wp;
{
std::shared_ptr<int> sp(new int);
wp = sp;
}
try
{
std::shared_ptr<int> sp1(wp); // weak_ptr has expired
}
catch (const std::bad_weak_ptr&)
{
std::cout << "bad weak pointer" << std::endl;
}
catch (...)
{
std::cout << "unknown exception" << std::endl;
}
return (0);
}
bad weak pointer
Requirements
Header: <memory>
Namespace: std