std::wstring_convert
STD：：wstring[医]转换
| Defined in header | | |
|---|
| template< class Codecvt, class Elem = wchar_t, class Wide_alloc = std::allocator<Elem>, class Byte_alloc = std::allocator<char> > class wstring_convert; | | (since C++11) (deprecated in C++17) |
类模板std::wstring_convert执行字节字符串之间的转换。std::string宽绳std::basic_string<Elem>，使用单独的代码转换方面。Codecvt...std::wstring_convert假定转换面的所有权，并且不能使用由区域设置管理的方面。适用于与std::wstring_convert是std::codecvt_utf8对于UTF-8/UC 2和UTF-8/UC 4转换和std::codecvt_utf8_utf16对于UTF-8/UTF-16转换。
成员类型
| Member type | Definition |
|---|
| byte_string | std::basic_string<char, char_traits<char>, Byte_alloc> |
| wide_string | std::basic_string<Elem, char_traits<Elem>, Wide_alloc> |
| state_type | Codecvt::state_type |
| int_type | wide_string::traits_type::int_type |
成员函数
| (constructor) | constructs a new wstring_convert (public member function) |
|---|
| operator= | the copy assignment operator is deleted (public member function) |
| (destructor) | destructs the wstring_convert and its conversion facet (public member function) |
| from_bytes | converts a byte string into a wide string (public member function) |
| to_bytes | converts a wide string into a byte string (public member function) |
| converted | returns the number of characters successfully converted (public member function) |
| state | returns the current conversion state (public member function) |
另见
| Characterconversions | locale-defined multibyte(UTF-8, GB18030) | UTF-8 | UTF-16 |
|---|
| UTF-16 | mbrtoc16 / c16rtomb(with C11's DR488) | codecvt<char16_t, char, mbstate_t>codecvt_utf8_utf16<char16_t>codecvt_utf8_utf16<char32_t>codecvt_utf8_utf16<wchar_t> | N/A |
| UCS2 | c16rtomb(without C11's DR488) | codecvt_utf8<char16_t> codecvt_utf8<wchar_t>(Windows). | codecvt_utf16<char16_t> codecvt_utf16<wchar_t>(Windows). |
| UTF-32 | mbrtoc32 / c32rtomb. | codecvt<char32_t, char, mbstate_t> codecvt_utf8<char32_t> codecvt_utf8<wchar_t>(non-Windows). | codecvt_utf16<char32_t> codecvt_utf16<wchar_t>(non-Windows). |
| system wide:UTF-32(non-Windows)UCS2(Windows) | mbsrtowcs / wcsrtombs use_facet<codecvt <wchar_t, char, mbstate_t>>(locale). | No | No |
| wbuffer_convert (C++11)(deprecated in C++17) | performs conversion between a byte stream buffer and a wide stream buffer (class template) |
|---|
| codecvt_utf8 (C++11)(deprecated in C++17) | converts between UTF-8 and UCS2/UCS4 (class template) |
| codecvt_utf8_utf16 (C++11)(deprecated in C++17) | converts between UTF-8 and UTF-16 (class template) |
在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。
http：//en.cppreference.com/w/cpp/locale/wstring[医]转换
