Varianti

    std::isblank<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>

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    <metanoindex/>

     
    C++
     
    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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    <tbody> </tbody>
    Elemento definito nell'header <locale>
    template< class charT > bool isblank( charT ch, const locale& loc );
    		 (dal C++11)


    Controlla se il carattere dato è classificato come uno spazio vuoto da facet ctype impostazioni internazionali di data.
    Original:
    Checks if the given character is classified as a blank character by the given locale's ctype facet.
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    Parametri

    ch -
    carattere
    Original:
    character
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    loc -
    locale
    Original:
    locale
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    Valore di ritorno

    Restituisce true se il personaggio è classificato come uno spazio vuoto, false altrimenti.
    Original:
    Returns true if the character is classified as a blank character, false otherwise.
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    Possibile implementazione

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

    Esempio

    Viene illustrato l'utilizzo di ISBLANK () con diverse impostazioni internazionali (OS-specifico) .
    Original:
    Demonstrates the use of isblank() with different locales (OS-specific).
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    #include <iostream>
#include <locale>
template< class charT >
void try_with(wchar_t c, const char* loc)
{
    std::wcout << "isblank('" << c << "', locale(\"" << loc << "\")) returned " << std::boolalpha
               << std::isblank(c, std::locale(loc)) << '\n';
}
int main()
{
    const wchar_t IDEO_SPACE = L'\u3000'; // Unicode character 'IDEOGRAPHIC SPACE'
    try_with(IDEO_SPACE, "C");
    try_with(IDEO_SPACE, "en_US.UTF-8");
}

    Output: 

    isblank(' ', locale("C")) returned false
isblank(' ', locale("en_US.UTF-8")) returned true

    Vedi anche

    (C++11)
    Verifica se un carattere è un carattere vuoto
    Original:
    checks if a character is a blank character
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    (funzione) [modifica]
    (C++11)
    Verifica se un carattere esteso è un carattere vuoto
    Original:
    checks if a wide character is a blank character
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    (funzione) [modifica]