string <-> wstring

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#include <boost/locale.hpp>

int TestChangeWS()
{
    // string -> wstring 
    std::wstring wname = boost::locale::conv::to_utf<wchar_t>(name, "GBK");
    std::wcout << TEXT("wname:\t") << wname << TEXT("\n");
    // wstring -> string 
    std::string sname = boost::locale::conv::from_utf(wname, "GBK");
    std::cout << "sname:\t" << sname << "\n";
    return 0;
}