-----Original Message----- From: Kahánek Petr Sent: Friday, January 04, 2008 10:22 AM To: 'boost-users@lists.boost.org' Subject: Problems when constructing time_duration and ptime from string Hi, It seems there are problems with duration/ptime construction from string, no matter if one uses duration_from_string, time_from_string or operator >>. Lets have the following code. Using Windows XP service pack 2, MSVS2005 SP 1, Boost 1-34.1 #include <string> #include <boost/date_time/posix_time/posix_time.hpp> using namespace std; using namespace boost; using namespace boost::posix_time; int _tmain(int argc, _TCHAR* argv[]) { string str; time_duration td; ptime time; // try to construct duration and ptime from string where there's no blank space between date and time // 1) duration_from_string will pass // 2) "time_duration >>" will pass // 3) time_from_string will throw // 4) "ptime >>" will pass str = "2007-01-2010:00:05"; td = duration_from_string(str); cout << "\"" << str << "\" == " << to_simple_string(td) << endl; stringstream ss(str); ss >> td; cout << "\"" << str << "\" == " << to_simple_string(td) << endl; try { time = time_from_string(str); cout << "\"" << str << "\" == " << time << endl; } catch(exception& e) { cout << "time_from_string could not construct time from \"" << str << "\", " << e.what() << endl; } try { stringstream ss(str); ss >> time; cout << "\"" << str << "\" == " << time << endl; } catch(exception& e) { cout << "operator >> could not get time from '" << "', " << e.what() << endl; } cout << endl << endl; // try to construct duration and ptime from "2007-01-20-1.xwerf" (mangled delimiters, rubbish in place of // fractional sec.) --> none will throw str = "2007-01-20-1.xwerf"; td = duration_from_string(str); cout << "\"" << str << "\" == " << to_simple_string(td) << endl; stringstream ss2(str); ss2 >> td; cout << "\"" << str << "\" == " << to_simple_string(td) << endl; time = time_from_string(str); cout << "\"" << str << "\" == " << time << endl; stringstream ss3(str); ss3 >> time; cout << "\"" << str << "\" == " << time << endl; cout << endl << endl; // try to construct duration and ptime from "2007.01.20.1.xwerf" (mangled delimiters, rubbish in place of // fractional sec.) --> none will throw str = "2007.01.20.1.0xwerf"; td = duration_from_string(str); cout << "\"" << str << "\" == " << to_simple_string(td) << endl; stringstream ss4(str); ss4 >> td; cout << "\"" << str << "\" == " << to_simple_string(td) << endl; time = time_from_string(str); cout << "\"" << str << "\" == " << time << endl; ss4 >> time; cout << "\"" << str << "\" == " << time << endl; cout << endl << endl; // try to construct duration and ptime from "2008-01-03" // none will throw, duration created although delimiter is "-", ptime created incorrectly str = "2008-01-03"; td = duration_from_string(str); cout << "\"" << str << "\" == " << to_simple_string(td) << endl; stringstream ss5(str); ss5 >> td; cout << "\"" << str << "\" == " << to_simple_string(td) << endl; str = "2008-01-03"; time = time_from_string(str); cout << "\"" << str << "\" == " << time << endl; stringstream ss6(str); ss6 >> time; cout << "\"" << str << "\" == " << time << endl; // even if duration is constructed, printing it to cout with operator << without conversion to string // will assert in strftime.c if hours are out of scope [0,23], or if minutes/seconds are out of [0,59] cout << str << " == " << td << endl; // CRASH return 0; } Output from this program: "2007-01-2010:00:05" == 2007:34:30 "2007-01-2010:00:05" == 2007:34:30 time_from_string could not construct time from "2007-01-2010:00:05", bad lexical cast: source type value could not be interpreted as target "2007-01-2010:00:05" == not-a-date-time "2007-01-20-1.xwerf" == 2007:01:20.100000 "2007-01-20-1.xwerf" == 2007:01:20.100000 "2007-01-20-1.xwerf" == 2007-Apr-13 15:01:20.100000 "2007-01-20-1.xwerf" == 2007-Apr-13 15:01:20.100000 "2007.01.20.1.0xwerf" == 2007:01:20.100000 "2007.01.20.1.0xwerf" == 2007:01:20.100000 "2007.01.20.1.0xwerf" == 2007-Apr-13 15:01:20.100000 "2007.01.20.1.0xwerf" == 2007-Apr-13 15:01:20.100000 "2008-01-03" == 2008:01:03 "2008-01-03" == 2008:01:03 "2008-01-03" == 2008-Mar-26 16:01:03 "2008-01-03" == 2008-Mar-26 16:01:03 ..and then it will assert on cout << td. Durations that have hours out of [0,23] or min/sec out of [0,59] are parsed successfully but cannot be printed to cout using << (assert in strftime.c). Workaround for "pure date", e.g. "2007-01-10", is to append "0" to it. "2007-01-10 0" is parsed OK. I guess these can be considered bugs? Br, Petr