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std::isalpha<div class="t-tr-text">(Std :: locale)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::locale)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

Da cppreference.com.
< cpp‎ | locale

 
 
Localizzazioni libreria
Impostazioni internazionali e sfaccettature
Original:
Locales and facets
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locale
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 charT >
bool isalpha( charT ch, const locale& loc );
Controlla se il carattere dato classificata come un carattere alfabetico dalla sfaccettatura std::ctype impostazioni internazionali di data.
Original:
Checks if the given character classified as an alphabetic character by the given locale's std::ctype facet.
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Indice

[modifica] Parametri

ch -
carattere
Original:
character
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loc -
locale
Original:
locale
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[modifica] Valore di ritorno

Restituisce true se il personaggio è classificato come alfabetico, false altrimenti.
Original:
Returns true if the character is classified as alphabetic, false otherwise.
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[modifica] Possibile implementazione

template< class charT >
bool isalpha( charT ch, const std::locale& loc ) {
    return std::use_facet<std::ctype<charT>>(loc).is(std::ctype_base::alpha, ch);
}

[modifica] Esempio

Viene illustrato l'utilizzo di isalpha () con diverse impostazioni internazionali (OS-specifico) .
Original:
Demonstrates the use of isalpha() with different locales (OS-specific).
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#include <iostream>
#include <locale>
int main()
{
    const wchar_t c = L'\u042f'; // cyrillic capital letter ya
 
    std::locale loc1("C");
    std::cout << "isalpha('Я​', C locale) returned "
               << std::boolalpha << std::isalpha(c, loc1) << '\n';
 
    std::locale loc2("en_US.UTF8");
    std::cout << "isalpha('Я', Unicode locale) returned "
              << std::boolalpha << std::isalpha(c, loc2) << '\n';
}

Output:

isalpha('Я​', C locale) returned false
isalpha('Я', Unicode locale) returned true

[modifica] Vedi anche

Verifica se un carattere è alfabetico
Original:
checks if a character is alphabetic
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(funzione) [edit]
Verifica se un carattere esteso è alfabetico
Original:
checks if a wide character is alphabetic
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(funzione) [edit]