Preprocessor

<metanoindex/>

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari (C++11)

Operazioni atomicche (C++11)

Multithreading (C++11)

 

Linguaggio C + +

Temi generali Original: General topics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Preprocessore Commenti Parole chiave	Tabella ASCII Sequenze di escape La storia del C + +
Controllo del flusso Original: Flow control The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Dichiarazioni esecuzione condizionale Original: Conditional execution statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
if statement	switch statement
Iterazione dichiarazioni Original: Iteration statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
for loop range-for loop (C++11)	while loop do-while loop
Vai dichiarazioni Original: Jump statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
continue statement break statement	goto statement return statement
Funzioni Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
dichiarazione di funzione
lambda funzione dichiarazione
funzione di modello
specificatore inline
eccezioni specifiche (deprecato)
noexcept specificatore (C++11)
Eccezioni Original: Exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
tiro espressione	blocco try-catch
Spazi dei nomi Original: Namespaces The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
namespace dichiarazione	alias dello spazio dei nomi
Tipi Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
tipi fondamentali composti tipi enumerazione tipi	sindacali tipi tipi di funzione
decltype specifier (C++11)
Specifiers Original: Specifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
cv specificatori
Durata di stoccaggio specificatori
constexpr specificatore (C++11)
specificatore auto (C++11)
alignas specificatore (C++11)
Inizializzazione Original: Initialization The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
predefinito di inizializzazione valore di inizializzazione inizializzazione a zero copiare inizializzazione inizializzazione diretta	inizializzazioni di aggregazione elenco di inizializzazione (C++11) inizializzazione delle costanti riferimento inizializzazione

Letterali Original: Literals The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
letterali interi caratteri letterali virgola mobile letterali stringhe letterali	letterali booleani nullptr (C++11) definito dall'utente (C++11)
Espressioni Original: Expressions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
valore categorie ordine di valutazione	operatori precedenza degli operatori
rappresentazioni alternative
Utilities Original: Utilities The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Tipi Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
typedef declaration
Tipo alias dichiarazione (C++11)
attributi (C++11)
Lancia Original: Casts The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
conversioni implicite
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
Fusione C-stile e funzionale
Occupazione della memoria Original: Memory allocation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
new expression	delete expression
Classi Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
classe di dichiarazione this pointer specificatori di accesso	amico specificatore liste di inizializzazione
Specifiche per una classe di funzioni proprietà Original: Class-specific function properties The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
funzione virtuale ignorare specificatore (C++11) identificatore finale (C++11)	esplicito (C++11) statico
Funzioni membro speciali Original: Special member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
costruttore di default costruttore di copia spostare costruttore (C++11)	copiare assegnazione spostare l'assegnazione (C++11) distruttore
Modelli Original: Templates The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
classe template
funzione di modello
modello di specializzazione
parametri confezioni (C++11)
Varie Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Montaggio in linea

 

Preprocessore

#if #ifdef #ifndef #else #elif #endif

#define #undef #,## operators

#include

#warning

#error

#pragma

#line

 

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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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)

  Original:

  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

  Original:

  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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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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• '

  condizionale

  Original:

  conditionally

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  ' di compilazione di parti del file di origine (controllata dalla direttiva #if, #ifdef, #ifndef, #else, #elif e #endif).

  Original:

  condizionale

  Original:

  conditionally

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  compile of parts of source file (controlled by directive #if, #ifdef, #ifndef, #else, #elif and #endif).

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• ' replace' macro di testo anche se può concatenare o citando identificatori (controllata dalle direttive #define e #undef, e gli operatori e # ##)

  Original:

  replace text macros while possibly concatenating or quoting identifiers (controlled by directives #define and #undef, and operators # and ##)

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• 'include' altri file (controllata da #include direttiva)

  Original:

  include other files (controlled by directive #include)

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• provocare un 'warning' (controllata dalla direttiva #warning)

  Original:

  cause a warning (controlled by directive #warning)

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• causare un 'error' (controllata dalla direttiva #error)

  Original:

  cause an error (controlled by directive #error)

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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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• '

  attuazione definito

  Original:

  implementation defined

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  ' comportamento (controllata dalle direttive #pragma)

  Original:

  attuazione definito

  Original:

  implementation defined

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  behavior (controlled by directives #pragma)

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• '

  il nome del file e le informazioni sulla riga

  Original:

  file name and line information

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  ' a disposizione del preprocessore (controllata dalle direttive #line)

  Original:

  il nome del file e le informazioni sulla riga

  Original:

  file name and line information

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  available to the preprocessor (controlled by directives #line)

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