std::bad_cast – cppreference.com

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definiert in Header `<typeinfo>`

`class bad_cast : public std::exception;`

Eine Ausnahme von dieser Art wird ausgelöst, wenn ein

dynamic_cast

zu einer Referenz-Typ die Laufzeit-Anreise (z. B. weil die Typen nicht durch Vererbung verbunden sind) nicht .

Original:

An exception of this type is thrown when a

dynamic_cast

to a reference type fails the run-time check (e.g. because the types are not related by inheritance).

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Inheritance diagram

Member-Funktionen


	baut eine neue bad_cast Objekt Original: constructs a new bad_cast object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)

Inherited from std::exception

Member functions


	Zerstört das Ausnahme-Objekt Original: destructs the exception object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (virtuellen öffentlichen Member-Funktion of `std::exception`) [edit]

	gibt einen erläuternden String Original: returns an explanatory string The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (virtuellen öffentlichen Member-Funktion of `std::exception`) [edit]

Beispiel

#include <iostream>
#include <typeinfo>

struct Foo { virtual void f() {} };
struct Bar { virtual void f() {} };

int main()
{
    Bar b;
    try {
        Foo& f = dynamic_cast<Foo&>(b);
    } catch(const std::bad_cast& e)
    {
        std::cout << e.what() << '\n';
    }
}

Output: