Hi, Sorry for not providing the simplest possible code to reproduce my problem, but I'm still new to spirit, I think I will miss some details in the conversion. I tried add the inclusion you suggested, but it did not help. In the mean while, I found this page: http://boost-spirit.com/home/2010/01/19/how-to-access-attributes-from-semant... which is a very good match on what I would like to do. The only problem is that I can not make it work... Here is my second attempt (simper that the first, but not as simple as you suggested... sorry) #include <string> #include <string.h> #include <iostream> #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/phoenix_core.hpp> #include <boost/spirit/include/phoenix_operator.hpp> struct Ipv4 { union { uint32_t as_int; uint8_t as_char[4]; } raw; }; Ipv4 make_ipv4(uint8_t i1, uint8_t i2, uint8_t i3, uint8_t i4) { Ipv4 ip; ip.raw.as_char[0] = i1; ip.raw.as_char[1] = i2; ip.raw.as_char[2] = i3; ip.raw.as_char[3] = i4; return ip; } namespace qi = boost::spirit::qi; qi::uint_parser<uint8_t, 10, 1, 3> octet; struct Ipv4Address : qi::grammar<const char *, Ipv4()> { Ipv4Address() : Ipv4Address::base_type(start) { start = ( octet >> qi::lit('.') >> octet >> qi::lit('.') >> octet >> qi::lit('.') >> octet ) [ //qi::_val = make_ipv4(1, 2, 3, 4) // working qi::_val = make_ipv4(qi::_1, qi::_2, qi::_3, qi::_4) // compile error ] ; } qi::rule<const char *, Ipv4()> start; } ipv4_address; int main() { Ipv4 ip; const char * s = "1.2.3.4"; bool r = qi::parse(s, s+strlen(s), ipv4_address, ip); std::cout << r << " " << (int)ip.raw.as_char[0] << "." << (int)ip.raw.as_char[1] << "." << (int)ip.raw.as_char[2] << "." << (int)ip.raw.as_char[3] << std::endl; } When compiling this I get the following compile error: /tmp/ip.cxx: In constructor 'Ipv4Address::Ipv4Address()': /tmp/ip.cxx:26:72: error: cannot convert 'const _1_type {aka const boost::phoenix::actor<boost::spirit::argument<0> >}' to 'uint8_t {aka unsigned char}' for argument '1' to 'Ipv4 make_ipv4(uint8_t, uint8_t, uint8_t, uint8_t)' Any hints? Best regards Allan W. Nielsen On Tue, Jul 3, 2012 at 1:10 PM, Igor R <boost.lists@gmail.com> wrote:
or even simpler: boost::tuple<uint8_t, uint8_t, uint8_t, uint8_t> v; bool r = qi::parse(s.begin(), s.end(), octet >> '.' >> octet >> '.'
octet >> '.' >> octet, v);
while the following works correctly: boost::fusion::vector<uint8_t, uint8_t, uint8_t, uint8_t> v; bool r = qi::parse(s.begin(), s.end(), octet >> '.' >> octet >> '.'
octet >> '.' >> octet, v);
So, the attribute gets converted to boost::tuple is some strange way...
Well, finally got it. You have to #include <boost/fusion/include/boost_tuple.hpp> to get boost::tuple adapted correctly. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users