std::wbuffer_convert<Codecvt,Elem,Tr>:: wbuffer_convert

#include <codecvt>
#include <iostream>
#include <locale>
#include <sstream>
int main()
{
    // 将UTF-8字符串流包装在UCS4 wbuffer_convert中
    std::stringbuf utf8buf("z\u00df\u6c34\U0001f34c");
                       // 或 "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9f\x8d\x8c"
                       // 或 u8"zß水🍌"
    std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv_in(&utf8buf);
    std::wistream ucsbuf(&conv_in);
    std::cout << "通过wbuffer_convert从UTF-8 stringbuf读取: "
              << std::hex << std::showbase;
    for (wchar_t c; ucsbuf.get(c);)
        std::cout << static_cast<std::wint_t>(c) << ' ';
    // 将支持UTF-8的std::cout包装在UCS4 wbuffer_convert中以输出UCS4
    std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv_out(std::cout.rdbuf());
    std::wostream out(&conv_out);
    std::cout << "\n通过wbuffer_convert向std::cout发送UCS4数据: ";
    out << L"z\u00df\u6c34\U0001f34c\n";
}