final specifier

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Linguaggio C + +
Temi generali
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General topics
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Controllo del flusso
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Flow control
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Dichiarazioni esecuzione condizionale
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Conditional execution statements
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Iterazione dichiarazioni
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Iteration statements
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Vai dichiarazioni
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Jump statements
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Funzioni
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Functions
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dichiarazione di funzione
lambda funzione dichiarazione
funzione di modello
specificatore inline
eccezioni specifiche(deprecato)
noexcept specificatore(C++11)
Eccezioni
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Exceptions
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Spazi dei nomi
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Namespaces
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Tipi
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Types
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decltype specifier(C++11)
Specifiers
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Specifiers
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cv specificatori
Durata di stoccaggio specificatori
constexpr specificatore(C++11)
specificatore auto(C++11)
alignas specificatore(C++11)
Inizializzazione
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Initialization
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Letterali
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Literals
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Espressioni
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Expressions
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rappresentazioni alternative
Utilities
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Utilities
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Tipi
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Types
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typedef declaration
Tipo alias dichiarazione(C++11)
attributi(C++11)
Lancia
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Casts
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conversioni implicite
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
Fusione C-stile e funzionale
Occupazione della memoria
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Memory allocation
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Classi
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Classes
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Specifiche per una classe di funzioni proprietà
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Class-specific function properties
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funzione virtuale
ignorare specificatore(C++11)
identificatore finale(C++11)
Funzioni membro speciali
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Special member functions
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Modelli
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Templates
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classe template
funzione di modello
modello di specializzazione
parametri confezioni(C++11)
Varie
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Miscellaneous
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Montaggio in linea
 
Specifica che un funzione virtuale non può essere sottoposto a override in una classe derivata o che una classe non può essere ereditata
Original:
Specifies that a funzione virtuale can not be overridden in a derived class or that a class cannot be inherited
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Indice

[modifica]Sintassi

function_declarationfinal;
classclass_namefinalbase_classes

[modifica]Spiegazione

Quando viene utilizzato in una dichiarazione di funzione virtuale, final specifica che la funzione non può essere sostituito dalle classi derivate.
Original:
When used in a virtual function declaration, final specifies that the function may not be overridden by derived classes.
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final è un identificatore con un significato particolare quando viene utilizzato in una dichiarazione di funzione membro di una classe o la testa. In altri contesti non è riservato e può essere utilizzata per nome oggetti e funzioni.
Original:
final is an identifier with a special meaning when used in a member function declaration or class head. In other contexts it is not reserved and may be used to name objects and functions.
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[modifica]Esempio

struct A {virtualvoid foo() final;};   struct B final : A {void foo();// Error: foo cannot be overridden as it's final in A};   struct C : B // Error: B is final{};

[modifica]Vedi anche

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