C++ 0x是否支持将std :: wstring转换为UTF-8字节序列？

#include<iostream>
#include<string>
#include<locale>
#include <codecvt>

std::string wstring_to_utf8(const std::wstring& wstr) {
    std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
    return conv.to_bytes(wstr);
}

int main() {
    std::wstring wstr = L"Hello, 世界!";
    std::string utf8_str = wstring_to_utf8(wstr);
    std::cout << "UTF-8 string: "<< utf8_str<< std::endl;
    return 0;
}