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std::bad_weak_ptr

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C++
 
Utilities-Bibliothek
 
Dynamische Speicherverwaltung
Low-Level-Speicherverwaltung
Zuweiser
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Allocators
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allocator
allocator_traits(C++11)
allocator_arg_t(C++11)
allocator_arg(C++11)
uses_allocator(C++11)
scoped_allocator_adaptor(C++11)
Initialisierter Speicher
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Uninitialized storage
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uninitialized_copy
uninitialized_copy_n(C++11)
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
Intelligente Zeiger
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Smart pointers
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unique_ptr(C++11)
shared_ptr(C++11)
weak_ptr(C++11)
auto_ptr(veraltet)
owner_less(C++11)
enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
default_delete(C++11)
Garbage Collection Unterstützung
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Garbage collection support
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declare_reachable(C++11)
undeclare_reachable(C++11)
declare_no_pointers(C++11)
undeclare_no_pointers(C++11)
pointer_safety(C++11)
get_pointer_safety(C++11)
Verschiedenes
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Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
C-Bibliothek
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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
 
definiert 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 das 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

(C++11)
 intelligenter Zeiger, der geteilten Objektbesitz abbildet
(Klassen-Template) [edit]
(C++11)
 intelligenter Zeiger, der eine schwache, d.h. nicht blockierende, Referenz auf einen std::shared_ptr verwaltet
(Klassen-Template) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/memory/bad_weak_ptr&oldid=29422“