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std::bad_weak_ptr

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Smart pointers
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enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
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C Library
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std::bad_weak_ptr
Member-Funktionen
Original:
Member functions
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bad_weak_ptr::bad_weak_ptr
 
Defined in header <memory>
class bad_weak_ptr;
(seit C++11)
std::bad_weak_ptr ist die Art des Objekts als Ausnahmen von den Herstellern von std::shared_ptr, dass std::weak_ptr als Argument, wenn die std::weak_ptr zu einem bereits gelöschten Objekts bezieht sich nehmen geworfen .
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
Über dieses Bild

Inheritance diagram

Inhaltsverzeichnis

[Bearbeiten] Member-Funktionen

baut die bad_weak_ptr Objekt
Original:
constructs the bad_weak_ptr object
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(öffentliche Elementfunktion)

Inherited from std::exception

Member functions

[virtuell]
zerstört sich die Ausnahme-Objekt
Original:
destructs the exception object
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(virtuellen öffentlichen Member-Funktion of std::exception) [edit]
[virtuell]
gibt einen erläuternden String
Original:
returns an explanatory string
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(virtuellen öffentlichen Member-Funktion of std::exception) [edit]

[Bearbeiten] Beispiel

#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

[Bearbeiten] Siehe auch

smart pointer with shared object ownership semantics
(Klassen-Template) [edit]
(C++11)
schwachen Referenz auf ein Objekt vom std::shared_ptr verwaltet
Original:
weak reference to an object managed by std::shared_ptr
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(Klassen-Template) [edit]