std::wstring_convert::wstring_convert
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<metanoindex/>
<tbody> </tbody> wstring_convert( Codecvt* pcvt = new Codecvt ); |
(1) | |
wstring_convert( Codecvt* pcvt, state_type state); |
(2) | |
wstring_convert( const byte_string& byte_err, const wide_string& wide_err = wide_string() ); |
(3) | |
1)
Constrói o objeto
wstring_convert com uma faceta de conversão especificada, utilizando padrão-construídos valores para o Estado mudança e as cordas de erro Original:
Constructs the
wstring_convert object with a specified conversion facet, using default-constructed values for the shift state and the error strings The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
2)
Constrói o objeto
wstring_convert com uma faceta de conversão especificada e estadual mudança especificado, usando padrão-construídos valores para as seqüências de erro Original:
Constructs the
wstring_convert object with a specified conversion facet and specified shift state, using default-constructed values for the error strings The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
3)
Constrói o objeto
wstring_convert com seqüências de erro especificados, usando new Codecvt como a faceta de conversão eo padrão construído state_type estado mudança como.Original:
Constructs the
wstring_convert object with specified error strings, using new Codecvt as the conversion facet and the default-constructed state_type as shift state.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Parâmetros
| pcvt | - | ponteiro para a conversão de faceta Codecvt tipo
Original: pointer to the conversion facet of type Codecvt The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| state | - | valor inicial do estado turno conversão
Original: initial value of the conversion shift state The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| byte_err | - | corda estreita para exibir em erros
Original: narrow string to display on errors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| wide_err | - | corda larga para exibir em erros
Original: wide string to display on errors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Exemplo
#include <locale>
#include <utility>
#include <codecvt>
// utility wrapper to adapt locale-bound facets for wstring/wbuffer convert
template<class Facet>
struct deletable_facet : Facet
{
template<class ...Args>
deletable_facet(Args&& ...args) : Facet(std::forward<Args>(args)...) {}
~deletable_facet() {}
};
int main()
{
// UTF-16le / UCS4 conversion
std::wstring_convert<std::codecvt_utf16<char32_t, 0x10ffff, std::little_endian>> u16to32;
// UTF-8 / wide string conversion with custom messages
std::wstring_convert<std::codecvt_utf8<wchar_t>> u8towide("Error!", L"Error!");
// GB18030 / wide string conversion facet
typedef deletable_facet<std::codecvt_byname<wchar_t, char, std::mbstate_t>> F;
std::wstring_convert<F> gbtowide(new F("zh_CN.gb18030"));
}