#include <iostream> #include <shand/date_time.hpp> #include <string> #include <boost/spirit/include/qi.hpp> #include <boost/fusion/include/vector.hpp> #include <boost/fusion/include/io.hpp> shand::date_time ParseDateTime(const std::string& s) { namespace qi = boost::spirit::qi; namespace fusion = boost::fusion; using namespace shand; typedef fusion::vector<int, int, int, int, int, int> value_type; typedef qi::rule<std::string::const_iterator, value_type()> rule_type; const rule_type r = qi::int_ >> '-' >> qi::int_ >> '-' >> qi::int_ >> ' ' >> qi::int_ >> ':' >> qi::int_ >> ':' >> qi::int_; std::string::const_iterator it = s.begin(); value_type result; if (!qi::parse(it, s.end(), r, result)) { throw std::runtime_error("parse error"); } return date_time( year(fusion::at_c<0>(result)) & month(fusion::at_c<1>(result)) & day(fusion::at_c<2>(result)) & hour(fusion::at_c<3>(result)) & minute(fusion::at_c<4>(result)) & second(fusion::at_c<5>(result)) ); } int main() { shand::date_time tm = ParseDateTime("2009-3-1 15:30:12"); std::cout << tm.format("%Y/%m/%d %H:%M") << std::endl; }
めんどくさいめんどくさい。
んー・・・何か考えます。
追記(2011/01/06 17:19)：
「YYYY/MM/DD HH:MM:SS」と「YYYY-MM-DD HH:MM:SS」両方に対応する必要がでてきたので例を追加。
#include <iostream> #include <shand/date_time.hpp> #include <string> #include <boost/spirit/include/qi.hpp> #include <boost/fusion/include/vector.hpp> #include <boost/fusion/include/io.hpp> shand::date_time ParseDateTime(const std::string& s) { namespace qi = boost::spirit::qi; namespace fusion = boost::fusion; using namespace shand; typedef fusion::vector<int, int, int, int, int, int> value_type; typedef qi::rule<std::string::const_iterator, value_type()> rule_type; const rule_type r = qi::int_ >> qi::omit[qi::char_("-/")] >> qi::int_ >> qi::omit[qi::char_("-/")] >> qi::int_ >> ' ' >> qi::int_ >> ':' >> qi::int_ >> ':' >> qi::int_; std::string::const_iterator it = s.begin(); value_type result; if (!qi::parse(it, s.end(), r, result)) { throw std::runtime_error("parse error"); } return date_time( year(fusion::at_c<0>(result)) & month(fusion::at_c<1>(result)) & day(fusion::at_c<2>(result)) & hour(fusion::at_c<3>(result)) & minute(fusion::at_c<4>(result)) & second(fusion::at_c<5>(result)) ); } int main() { { shand::date_time tm = ParseDateTime("2009-03-01 15:30:12"); std::cout << tm.format("%Y/%m/%d %H:%M") << std::endl; } [ shand::date_time tm = ParseDateTime("2011/01/06 00:03:57"); std::cout << tm.format("%Y/%m/%d %H:%M") << std::endl; } }
2009/03/01 15:30:12 2011/01/06 00:03:57
