std::has_facet
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<metanoindex/>
<tbody> </tbody>| Déclaré dans l'en-tête <locale>
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template< class Facet > bool has_facet( const locale& loc ); |
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Vérifie si le
loc locale met en œuvre le Facet facette .Original:
Checks if the locale
loc implements the facet Facet.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Paramètres
| loc | - | l'objet locale à interroger
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. |
Retourne la valeur
Retours
true si le Facet facette a été installé dans la localisation loc, false autrement .Original:
Returns
true if the facet Facet was installed in the locale loc, false otherwise.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Spécification d'exception
Exemple
#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';
}
Résultat :
Can loc classify chars? true
Can loc classify char32_t? false
Does loc implement myfacet? true
Voir aussi
ensemble de facettes polymorphes qui encapsulent les différences culturelles 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) | |
obtient une facette d'un lieu Original: obtains a facet from a locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) | |