Namespace
Varianti

std::tolower<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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toupper
tolower
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 >
charT tolower( charT ch, const locale& loc );
Converte il ch carattere in minuscolo, se possibile, in base alle regole di conversione specificate dalla sfaccettatura std::ctype impostazioni internazionali di data.
Original:
Converts the character ch to lowercase if possible, using the conversion rules specified 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 la forma minuscola del ch se uno è presente nel locale, altrimenti restituisce ch invariato.
Original:
Returns the lowercase form of ch if one is listed in the locale, otherwise return ch unchanged.
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[modifica] Note

Solo 1:1 mapping carattere può essere effettuata da questa funzione, ad esempio la lettera maiuscola greca 'Σ' ha due forme minuscole, a seconda della posizione in una parola: 'σ' e 'ς'. Una chiamata a std::tolower non può essere utilizzato per ottenere la forma corretta minuscola in questo caso.
Original:
Only 1:1 character mapping can be performed by this function, e.g. the Greek uppercase letter 'Σ' has two lowercase forms, depending on the position in a word: 'σ' and 'ς'. A call to std::tolower cannot be used to obtain the correct lowercase form in this case.
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[modifica] Possibile implementazione

template< class charT >
charT tolower( charT ch, const std::locale& loc ) {
    return std::use_facet<std::ctype<charT>>(loc).tolower(ch);
}

[modifica] Esempio

[modifica] Vedi anche

converte un carattere in maiuscolo utilizzando il facet CType di un locale
Original:
converts a character to uppercase using the ctype facet of a locale
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(funzione di modello) [edit]
converte un carattere in minuscolo
Original:
converts a character to lowercase
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(funzione) [edit]
converte un carattere esteso in minuscolo
Original:
converts a wide character to lowercase
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(funzione) [edit]