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Preprocessor

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C++
 
Linguaggio C + +
Temi generali
Original:
General topics
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Preprocessore
Commenti
Parole chiave
Controllo del flusso
Original:
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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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
 
Preprocessore
 
Il preprocessore viene eseguito prima che la compilazione inizi. Il risultato del pre-processing è un singolo file che viene quindi passato al compilatore effettivo.
Original:
The preprocessor runs before the compilation begins. The result of preprocessing is single file which is then passed to the actual compiler.
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[modifica] Direttive

Le direttive al preprocessore controllano il comportamento del preprocessore. Ogni direttiva occupa una riga e ha il seguente formato:
Original:
The preprocessing directives control the behavior of the preprocessor. Each directive occupies one line and has the following format:
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  • # carattere
    Original:
    # character
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  • istruzione pre-elaborazione (uno dei define, undef, include, if, ifdef, ifndef, else, elif, endif, line, error, warning, pragma)
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    preprocessing instruction (one of define, undef, include, if, ifdef, ifndef, else, elif, endif, line, error, warning, pragma)
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  • argomenti (dipende dalle istruzioni)
    Original:
    arguments (depends on the instruction)
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  • linea di interruzione
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    line break
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La direttiva null (# seguita da un'interruzione di riga) è ammesso e non ha alcun effetto.
Original:
The null directive (# followed by a line break) is allowed and has no effect.
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[modifica] Capabilities

Il preprocessore ha le capacità di traduzione dei file di origine:
Original:
The preprocessor has the source file translation capabilities:
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I seguenti aspetti del preprocessore può essere controllato:
Original:
The following aspects of the preprocessor can be controlled:
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Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/preprocessor&oldid=27350"