std::towlower
De cppreference.com
<metanoindex/>
<tbody> </tbody>| Definido no cabeçalho <cwctype>
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std::wint_t towlower( std::wint_t ch ); |
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Converte o caráter dado ampla para minúsculas, se possível.
Original:
Converts the given wide character to lowercase, if possible.
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Parâmetros
| ch | - | caracteres largos para ser convertido
Original: wide character to be converted 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
Versão minúscula
ch ou ch não modificada se nenhuma versão minúscula é listada na localidade C atual.Original:
Lowercase version of
ch or unmodified ch if no lowercase version is listed in the current C locale.The text has been machine-translated via Google Translate.
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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::towlower 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::towlower cannot be used to obtain the correct lowercase form in this case.
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Exemplo
#include <iostream>
#include <cwctype>
#include <clocale>
int main()
{
wchar_t c = L'\u0190'; // Latin capital open E ('Ɛ')
std::cout << std::hex << std::showbase;
std::cout << "in the default locale, towlower(" << (std::wint_t)c << ") = "
<< std::towlower(c) << '\n';
std::setlocale(LC_ALL, "en_US.utf8");
std::cout << "in Unicode locale, towlower(" << (std::wint_t)c << ") = "
<< std::towlower(c) << '\n';
}
Saída:
in the default locale, towlower(0x190) = 0x190
in Unicode locale, towlower(0x190) = 0x25b