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    std::bad_cast

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    C++
     
    Utilities-Bibliothek
     
    Geben Sie Unterstützung
    Grundtypen
    Original:
    Basic types
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    Grundtypen
    Feste Breite Integer-Typen(C++11)
    Numerische Grenzen
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    Numeric limits
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    numeric_limits
    C numerische begrenzt Schnittstelle
    Laufzeit-Typinformationen
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    Runtime type information
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    bad_typeid
    bad_cast
    Exterieur
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    Type traits
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    Primären Typ Kategorien
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    Primary type categories
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    is_void(C++11)
    is_array(C++11)
    is_pointer(C++11)
    is_enum(C++11)
    is_union(C++11)
    is_class(C++11)
    is_function(C++11)
    is_reference(C++11)
    is_lvalue_reference(C++11)
    is_rvalue_reference(C++11)
    is_member_pointer(C++11)
    is_member_object_pointer(C++11)
    is_member_function_pointer(C++11)
    Typ Eigenschaften
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    Type properties
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    is_const(C++11)
    is_volatile(C++11)
    is_pod(C++11)
    is_empty(C++11)
    is_polymorphic(C++11)
    is_abstract(C++11)
    Unterstützte Operationen
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    Supported operations
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    is_constructible
    is_trivially_constructible
    is_nothrow_constructible    		(C++11)
    (C++11)
    (C++11)
    is_default_constructible
    is_trivially_default_constructible
    is_nothrow_default_constructible    		(C++11)
    (C++11)
    (C++11)
    is_copy_constructible
    is_trivially_copy_constructible
    is_nothrow_copy_constructible    		(C++11)
    (C++11)
    (C++11)
    is_move_constructible
    is_trivially_move_constructible
    is_nothrow_move_constructible    		(C++11)
    (C++11)
    (C++11)
    is_assignable
    is_trivially_assignable
    is_nothrow_assignable    		(C++11)
    (C++11)
    (C++11)
    is_copy_assignable
    is_trivially_copy_assignable
    is_nothrow_copy_assignable    		(C++11)
    (C++11)
    (C++11)
    is_move_assignable
    is_trivially_move_assignable
    is_nothrow_move_assignable    		(C++11)
    (C++11)
    (C++11)
    is_destructible
    is_trivially_destructible
    is_nothrow_destructible    		(C++11)
    (C++11)
    (C++11)
    has_virtual_destructor(C++11)
    Beziehungen und Eigentum Abfragen
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    Relationships and property queries
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    is_same(C++11)
    is_base_of(C++11)
    is_convertible(C++11)
    alignment_of(C++11)
    rank(C++11)
    extent(C++11)
    Typ Modifikationen
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    Type modifications
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    Typ Transformationen
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    Type transformations
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    aligned_storage(C++11)
    aligned_union(C++11)
    decay(C++11)
    enable_if(C++11)
    Typ-Trait-Konstanten
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    Type trait constants
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    integral_constant(C++11)
     
    std::bad_cast
    Member-Funktionen
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    Member functions
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    bad_cast::bad_cast
    Geerbt von std::exception
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    Inherited from std::exception
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    exception::~exception
    exception::what
     
    definiert in Header <typeinfo>
    class bad_cast :publicstd::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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    cpp/error/exceptionstd-bad cast-inheritance.svg
    Über dieses Bild

    Inheritance diagram

    Inhaltsverzeichnis

    [Bearbeiten]Member-Funktionen

    baut eine neue bad_cast Objekt
    Original:
    constructs a new bad_cast 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 <iostream>#include <typeinfo>   struct Foo {virtualvoid f(){}};struct Bar {virtualvoid f(){}};   int main(){ Bar b;try{ Foo& f =dynamic_cast<Foo&>(b);}catch(const std::bad_cast& e){std::cout<< e.what()<<'\n';}}

    Output: 

    Bad dynamic_cast!
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/types/bad_cast&oldid=28127“
    close