std::use_facet

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C++

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Libreria di Utilità

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Localizzazione

Espressioni regolari (C++11)

Operazioni atomicche (C++11)

Multithreading (C++11)

 

Localizzazioni libreria

Impostazioni internazionali e sfaccettature Original: Locales and facets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
locale
use_facet	has_facet
Carattere classificazione Original: Character classification The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
isspace isblank (C++11) iscntrl isupper islower isalpha	isdigit ispunct isxdigit isalnum isprint isgraph
Conversioni Original: Conversions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
toupper tolower	wstring_convert (C++11) wbuffer_convert (C++11)
Facet categoria classi di base Original: Facet category base classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ctype_base codecvt_base messages_base	time_base money_base
Facet categorie Original: Facet categories The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ctype ctype<char> codecvt collate messages time_get time_put	num_get num_put numpunct money_get money_put moneypunct
Locale specifici aspetti Original: Locale-specific facets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ctype_byname ctype_byname<char> codecvt_byname messages_byname collate_byname	time_get_byname time_put_byname numpunct_byname moneypunct_byname
Codice di conversione sfaccettature Original: Code conversion facets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
codecvt_utf8 (C++11) codecvt_utf16 (C++11)	codecvt_utf8_utf16 (C++11) codecvt_mode (C++11)
C locale Original: C locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
setlocale localeconv lconv	LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME

 

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Elemento definito nell'header <locale>
template< class Facet > const Facet& use_facet( const std::locale& loc );

Ottiene un riferimento a un aspetto attuato loc.

Original:

Obtains a reference to a facet implemented by loc.

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Parametri

loc

-

l'oggetto locale per eseguire una query Original: the locale object to query The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

Restituisce un riferimento la faccetta. Il riferimento restituito da questa funzione è valida fino a quando qualsiasi oggetto che implementa std::locale esiste Facet.

Original:

Returns a reference the facet. The reference returned by this function is valid as long as any std::locale object exists that implements Facet.

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Eccezioni

std::bad_cast if std::has_facet<Facet>(loc) == false.

Esempio

Visualizzare il 3 lettere nome della valuta utilizzata dal locale preferita dell'utente

Original:

Display the 3-letter currency name used by the user's preferred locale

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#include <iostream>
#include <locale>

int main()
{
    std::locale loc = std::locale(""); // user's preferred locale
    std::cout << "Your currency string is "
              << std::use_facet<std::moneypunct<char, true>>(loc).curr_symbol() << '\n';
}

Output:

Your currency string is USD

Vedi anche

locale	serie di aspetti polimorfi che incapsulano le differenze culturali Original: set of polymorphic facets that encapsulate cultural differences The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe)
has_facet	Verifica se un locale implementa un determinato aspetto Original: checks if a locale implements a specific facet The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)