Как использовать boost :: spirit для разбора UTF-8?

#include 
#include 
#include 
#include 

#define BOOST_SPIRIT_UNICODE // We'll use unicode (UTF8) all throughout

#include 
#include 
#include 

void parse_simple_string()
{
    namespace qi = boost::spirit::qi;    
    namespace encoding  = boost::spirit::unicode;
    //namespace stw = boost::spirit::standard_wide;

    typedef std::wstring::const_iterator iterator_type;

    std::vector result;
    std::wstring const input = LR"(12,3","ab,cd","G,G\"GG","kkk","10,\"0","99987","PPP","你好)";

    qi::rule key = +(qi::unicode::char_ - qi::lit(L"\",\""));
    qi::phrase_parse(input.begin(), input.end(),
                     key % qi::lit(L"\",\""),
                     encoding::space,
                     result);

    //std::copy(result.rbegin(), result.rend(), std::ostream_iterator  (std::wcout, L"\n"));
    for(auto const &data : result) std::wcout