Namespace
Varianti

std::has_facet

Da cppreference.com.
< cpp‎ | locale

 
 
Localizzazioni libreria
Impostazioni internazionali e sfaccettature
Original:
Locales and facets
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locale
has_facet
Carattere classificazione
Original:
Character classification
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Conversioni
Original:
Conversions
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Facet categoria classi di base
Original:
Facet category base classes
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Facet categorie
Original:
Facet categories
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Locale specifici aspetti
Original:
Locale-specific facets
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Codice di conversione sfaccettature
Original:
Code conversion facets
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
C locale
Original:
C locale
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Defined in header <locale>
template< class Facet >
bool has_facet( const locale& loc );
Controlla se il loc locale implementa il Facet aspetto.
Original:
Checks if the locale loc implements the facet Facet.
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Indice

[modifica] Parametri

loc -
l'oggetto locale per eseguire una query
Original:
the locale object to query
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[modifica] Valore di ritorno

Restituisce true se il Facet aspetto è stato installato nel locale loc, false altrimenti.
Original:
Returns true if the facet Facet was installed in the locale loc, false otherwise.
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[modifica] Eccezione specifica

noexcept specification:  
noexcept
  (dal C++11)

[modifica] Esempio

#include <iostream>
#include <locale>
// minimal custom facet
struct myfacet : public std::locale::facet {
    static std::locale::id id;
};
std::locale::id myfacet::id;
int main()
{
    // loc is a "C" locale with myfacet added
    std::locale loc(std::locale::classic(), new myfacet);
    std::cout << std::boolalpha
              << "Can loc classify chars? "
              << std::has_facet<std::ctype<char>>(loc) << '\n'
              << "Can loc classify char32_t? "
              << std::has_facet<std::ctype<char32_t>>(loc) << '\n'
              << "Does loc implement myfacet? "
              << std::has_facet<myfacet>(loc) << '\n';
}

Output:

Can loc classify chars? true
Can loc classify char32_t? false
Does loc implement myfacet? true

[modifica] Vedi anche

serie di aspetti polimorfi che incapsulano le differenze culturali
Original:
set of polymorphic facets that encapsulate cultural differences
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(classe) [edit]
ottiene un aspetto da un locale
Original:
obtains a facet from a locale
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(funzione di modello) [edit]