#include <boost/uuid/uuid.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/qi_uint.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>

namespace qi = boost::spirit::qi;
namespace px = boost::phoenix;

static qi::uint_parser<uint8_t, 16, 2, 2> hx;

boost::uuids::uuid from_string(const std::string& rep)
{
    boost::uuids::uuid u;
    
    std::string::const_iterator rep_begin = rep.begin();
    std::string::const_iterator rep_end   = rep.end();
    
    const bool okay = boost::spirit::qi::parse( rep_begin, rep_end,
        hx[ px::ref(u.data[0]) = qi::_1 ] > 
        hx[ px::ref(u.data[1]) = qi::_1 ] > 
        hx[ px::ref(u.data[2]) = qi::_1 ] > 
        hx[ px::ref(u.data[3]) = qi::_1 ] >
        '-' >
        hx[ px::ref(u.data[4]) = qi::_1 ] > 
        hx[ px::ref(u.data[5]) = qi::_1 ] >
        '-' >
        hx[ px::ref(u.data[6]) = qi::_1 ] > 
        hx[ px::ref(u.data[7]) = qi::_1 ] >
        '-' >
        hx[ px::ref(u.data[8]) = qi::_1 ] > 
        hx[ px::ref(u.data[9]) = qi::_1 ] >  // enable this line (or any other line below) and you'll see the error
        '-' >
//        hx[ px::ref(u.data[10]) = qi::_1 ] > 
//        hx[ px::ref(u.data[11]) = qi::_1 ] > 
//        hx[ px::ref(u.data[12]) = qi::_1 ] > 
//        hx[ px::ref(u.data[13]) = qi::_1 ] >
//        hx[ px::ref(u.data[14]) = qi::_1 ] > 
        hx[ px::ref(u.data[15]) = qi::_1 ]

        );
    
    if(!okay) throw std::runtime_error("cannot parse string \"" + rep + "\" as a UUID");
    return u;
}


int main()
{
    boost::uuids::uuid u = from_string("f0cbb6f6-3c39-42e0-bfac-5a34a2900f1d");
    return u.data[0];
}