Hi all, I am having a problem with the following snippet of code. What I want to do is parse a line of alpha numeric characters from a file_iterator and then use the read characters to construct a new object which takes a std::string and integer argument for it's constructor. To do this I am using the statement below: p >> (+alpha_p)[ create_dfa( self.m_dfa, construct_<DFA>( construct_<std::string>( arg1 ), var(500) ) ) ]; This is the code I've got: #include <vector> #include <iostream> #include <boost/spirit/core.hpp> #include <boost/spirit/iterator/file_iterator.hpp> #include <boost/spirit/attribute.hpp> #include <boost/spirit/utility/confix.hpp> #include <boost/spirit/actor.hpp> #include <boost/spirit/phoenix.hpp> using namespace boost::spirit; using namespace phoenix; struct DFA { DFA( std::string s, int i ) : m_name(s), m_i(i) {} std::string m_name; int m_i; }; struct create_dfa_impl { template<typename Container, typename Item> struct result { typedef void type; }; template<typename Container, typename Item> void operator()( Container& c, Item const& item ) const { c.push_back( item ); } }; function<create_dfa_impl> const create_dfa = create_dfa_impl(); struct Script_parser : public grammar<Script_parser> { Script_parser( std::vector<DFA> &dfa ) : m_dfa( dfa ) {} template<typename ScannerT> struct definition { definition( Script_parser const& self ) { p = (*alpha_p)[ create_dfa( self.m_dfa, construct_<DFA>( construct_<std::string>(arg1, arg2), 500 ) ) ]; } typedef rule<ScannerT> rule_t; rule_t p; rule_t const& start() const { return p; } }; std::vector<DFA> &m_dfa; }; typedef char char_t; typedef file_iterator<char_t> iterator_t; int main( int argc, char *argv[] ) { using namespace std; if( argc != 2 ) { cout << "Invalid arguments" << endl; return -1; } iterator_t first( argv[1] ); iterator_t last = first.make_end(); std::vector<DFA> vDFA; Script_parser p(vDFA); parser_info<iterator_t> info = parse( first, last, p ); if( info.hit ) { cout << "Parsing successfull" << endl; } } This doesn't even compile, and I have absolutely no idea why. All the compiler shows is pages and pages of garbage that means absolutely nothing. Please help! Stephen