std::has_facet

 

C++

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Biblioteca localizações

Localidades e facetas 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
Classificação de caracteres 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
Conversões 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 classes base da categoria 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
Categorias faceta 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
Específicos da localidade facetas 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
Facetas de conversão de código 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 localidade 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

 

Defined in header <locale>
template< class Facet > bool has_facet( const locale& loc );

Verifica se o loc local implementa o Facet faceta.

Original:

Checks if the locale loc implements the facet Facet.

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Parâmetros

loc

-

o objeto de localidade para consultar 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.

Valor de retorno

Retorna true se o Facet faceta foi instalado na localidade loc, false outra forma.

Original:

Returns true if the facet Facet was installed in the locale loc, false otherwise.

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Especificação de exceção

noexcept specification:  

noexcept

  (a partir do C++ 11)

Exemplo

#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

Veja também

locale	conjunto de facetas polimórficos que encapsulam as diferenças culturais 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)
use_facet	obtém uma faceta de uma localidade 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. (modelo de função)