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

#include <codecvt>
#include <iostream>
#include <locale>
#include <sstream>
 
int main()
{
 // Wrap a UTF-8 string stream in a UCS4 wbuffer_convert
 std::stringbuf utf8buf("z\u00df\u6c34\U0001f34c");
 // or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9f\x8d\x8c"
 // or u8"zß水🍌"
 std::wbuffer_convert <std::codecvt_utf8 <wchar_t>> conv_in(&utf8buf);
 std::wistream ucsbuf(&conv_in);
 std::cout << "Reading from a UTF-8 stringbuf via wbuffer_convert: "
 << std::hex << std::showbase ;
 for (wchar_t c; ucsbuf.get(c);)
 std::cout << static_cast<std::wint_t >(c) << ' ';
 
 // Wrap a UTF-8 aware std::cout in a UCS4 wbuffer_convert to output UCS4
 std::wbuffer_convert <std::codecvt_utf8 <wchar_t>> conv_out(std::cout.rdbuf());
 std::wostream out(&conv_out);
 std::cout << "\nSending UCS4 data to std::cout via wbuffer_convert: ";
 out << L"z\u00df\u6c34\U0001f34c\n";
}

Reading from a UTF-8 stringbuf via wbuffer_convert: 0x7a 0xdf 0x6c34 0x1f34c 
Sending UCS4 data to std::cout via wbuffer_convert: zß水🍌