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std::bad_weak_ptr

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(C++11)
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(C++11)
bad_weak_ptr
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std::bad_weak_ptr
Las funciones miembro
Original:
Member functions
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Definido en la cabecera <memory>
class bad_weak_ptr;
(desde C++11)
std::bad_weak_ptr es el tipo del objeto lanzado como excepciones por los constructores de std::shared_ptr que tienen std::weak_ptr como argumento, cuando el std::weak_ptr se refiere a un objeto ya suprimidos .
Original:
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.
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cpp/error/exceptionstd-bad weak ptr-inheritance.svg
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Inheritance diagram

Contenido

[editar] Las funciones miembro

construye el objeto bad_weak_ptr
Original:
constructs the bad_weak_ptr object
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(función miembro público)

Inherited from std::exception

Member functions

[virtual]
destructs el objeto de excepción
Original:
destructs the exception object
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(función miembro público virtual de std::exception) [editar]
[virtual]
devuelve una cadena explicativa
Original:
returns an explanatory string
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(función miembro público virtual de std::exception) [editar]

[editar] Ejemplo

#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';
    }
}

Salida:

std::bad_weak_ptr

[editar] Ver también

smart pointer with shared object ownership semantics
(plantilla de clase) [editar]
(C++11)
débil referencia a un objeto administrado por std::shared_ptr
Original:
weak reference to an object managed by std::shared_ptr
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(plantilla de clase) [editar]