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>

 

C++

Linguagem

Conceitos

Biblioteca de utilitários

Biblioteca cordas

Recipientes biblioteca

Biblioteca algoritmos

Biblioteca iteradores

Biblioteca numéricos

De entrada / saída da biblioteca

Biblioteca localizações

Biblioteca de expressões regulares (C++11)

Biblioteca operações atômica (C++11)

Biblioteca de suporte a discussão (C++11)

 

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 charT > charT tolower( charT ch, const locale& loc );

Converte o ch personagem para minúsculas se possível, usando as regras de conversão especificados pela faceta determinada localidade de std::ctype.

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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Parâmetros

ch	-	personagem Original: character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
loc	-	localidade Original: locale 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 a forma de minúsculas ch se está listado no local, caso contrário retorna ch inalterada.

Original:

Returns the lowercase form of ch if one is listed in the locale, otherwise return ch unchanged.

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Notas

Apenas 01:01 mapeamento de caracteres pode ser realizada por esta função, por exemplo, a letra maiúscula grega "Σ" tem duas formas minúsculas, dependendo da posição em uma palavra: "σ" e "ς". Uma chamada para std::tolower não pode ser utilizado para obter a forma correcta minúsculas neste 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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Possível implementação

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

Veja também

toupper(std::locale)	converte um caractere em maiúsculas usando a faceta ctype de uma localidade Original: converts a character to uppercase using the ctype facet of 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)
tolower	converte um caractere para minúsculo Original: converts a character to lowercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função)
towlower	converte um caractere largo para minúsculas Original: converts a wide character to lowercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função)