Submitted By: Nobody/Anonymous (nobody) Assigned to: Jeff Garland (az_sw_dude) Summary: local_adjustor::utc_to_local throws "Time label invalid"
Initial Comment: using namespace boost::posix_time; using namespace boost::date_time; using namespace boost::gregorian;
ptime datetime( date( 2005, 4, 2 ), time_duration( 23, 0, 0 ) ); typedef local_adjustor< ptime, 3, us_dst > adj; ptime adj_time( adj::utc_to_local( datetime ) ); // Fails with "Time label invalid"
Compiled on boost 1.32.0 with msvc++ 7.1.3088
This is correct. Since the date and UTC offset you gave would end up right on the transition into dst, it is considered an invalid time label. I believe we are going to depricate this code (local_adjustor). With version 1.33 we've introduced a local_date_time. Here's an example showing how to accomplish the above calculation: #include <iostream> #include <boost/date_time/local_time/local_time.hpp> int main() { using namespace boost::gregorian; using namespace boost::posix_time; using namespace boost::local_time; ptime datetime_1(date(2005, 4, 2), time_duration(22, 59, 59) ); ptime datetime_2(date(2005, 4, 2), time_duration(23, 0, 0) ); time_zone_ptr my_zone(new posix_time_zone("STD03DST,M4.1.0,M10.1.0")); local_date_time ldt_1(datetime_1, my_zone); // given ptime is UTC local_date_time ldt_2(datetime_2, my_zone); // given ptime is UTC std::cout << ldt_1.local_time() << std::endl; // "2005-Apr-03 01:59:59" <- not dst std::cout << ldt_2.local_time() << std::endl; // "2005-Apr-03 03:00:00" <- in dst } Current cvs is already capable of this. Hope this helps, Bart