Namespace
Varianti

delete expression

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C++
 
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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delete expression
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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esplicito (C++11)
statico
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
 
Oggetto distrugge (s) concesso precedentemente dalla <div class="t-tr-text"> nuova espressione
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new expression
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e rilascia ottenuti area di memoria
Original:
Destructs object(s) previously allocated by the
nuova espressione
Original:
new expression
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</div> and releases obtained memory area
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[modifica] Sintassi

::(opzionale)    delete    expression (1)
::(opzionale)    delete [] expression (2)

[modifica] Spiegazione

Oggetti distrugge, precedentemente costruito espressione new e rilascia l'area di memoria ottenuto. Il expression deve trasformarsi in un valore di puntatore che è stato restituito dalla chiamata precedente l'espressione new. Per singoli oggetti allocati prima versione della espressione deve essere utilizzato, mentre per la seconda versione array deve essere utilizzato. Non c'è espressione delete deallocazione di oggetti inizializzati da posizionamento' nuova funzione deallocazione e distruttore deve essere chiamato in modo esplicito.
Original:
Destructs objects, previously constructed by new expression and releases the obtained memory area. The expression must result in a pointer value that was returned by previous call to the new expression. For single allocated objects the first version of the expression must be used, whereas for arrays the second version must be used. There is no delete expression deallocating objects initialized by placement new, deallocation function and destructor must be explicitly called.
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La memoria viene deallocata da un deallocazione funzione, sia operator delete (per la prima versione della espressione) o operator delete[] (per la seconda versione della espressione).
Original:
The memory is deallocated by an deallocazione funzione, either operator delete (for the first version of the expression) or operator delete[] (for the second version of the expression).
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Il nome della funzione di deallocazione è in primo luogo cercato nel locale classe tipo ambito di applicazione e solo se la ricerca ha esito negativo, lo spazio dei nomi globale viene cercato. Se :: è presente nell'espressione delete, solo lo spazio dei nomi globale viene cercato. Il prototipo della funzione deve essere simile al seguente:
Original:
The deallocation function's name is firstly looked up in the local class type scope and only if the lookup fails, the global namespace is looked up. If :: is present in the delete expression, only the global namespace is looked up. The prototype of the function must look like the following:
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void operator delete  (void *ptr);
 for the first version
void operator delete[](void *ptr);
 for the second version
Entrambe queste funzioni sono implicitamente dichiarate in ogni unità di traduzione. Inoltre, le implementazioni impliciti sono forniti dal compilatore di default, a meno che il programma è implementato in modo esplicito. Vedi questo per ulteriori informazioni.
Original:
Both these functions are implicitly declared in each translation unit. Also, implicit implementations are provided by the compiler by default, unless the program has explicitly implemented them. See questo for more information.
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[modifica] Parole chiave

delete

Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/language/delete&oldid=25938"