Difference between revisions of "cpp/memory/bad weak ptr"
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Revision as of 00:39, 29 April 2012
Template:cpp/memory/sidebar Template:ddcl list begin <tr class="t-dsc-header">
<td>Defined in header
</td>
<memory>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td >class bad_weak_ptr : public std::exception;
</td>
<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> Template:ddcl list end
std::bad_weak_ptr is the type of the object thrown as exceptions by the constructors of std::shared_ptr that take std::weak_ptr as the argument, when the std::weak_ptr refers to an already deleted object.
Contents |
Member functions
| Constructs the bad_weak_ptr object (public member function) | |
| Returns the explanatory string (public member function) |
Inherited from std::exception
Member functions
| [virtual] |
destroys the exception object (virtual public member function of std::exception)
|
| [virtual] |
returns an explanatory string (virtual public member function of std::exception)
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Example
Run this code
#include <memory> #include <iostream> int main() { std::shared_ptr<int> p1(new int(42)); std::weak_ptr<int> wp(p1); p1.reset(); try { std::shared_ptr<int> p2(wp); } catch(const std::bad_weak_ptr& e) { std::cout << e.what() << '\n'; } }
Output:
std::bad_weak_ptr
