ariasgore@gmx.de wrote, On 1.9.2009 11:05:
Hi, I have been trying to format a simple posix date time for string representation.
The basic part is plain and simple: ---------------------------------------------- #include <boost/date_time/posix_time/posix_time.hpp> namespace ps = boost::posix_time; ps::ptime t(ps::second_clock::local_time()); std::string foo = ps::to_simple_string(t); ----------------------------------------------
But how can I format this returned string? I think the facets are required but as mentioned here : http://www.boost.org/doc/libs/1_40_0/doc/html/date_time/date_time_io.html#da... I tried something with the boost::date_time::date_input_facet: e.g ---------------------------------------------- ps::date_input_facet("%A"); This is a no-op. It creates and destroys instance of date_input_facet at the same line. Beside that, it is also input date _input_ facet. It does not deal with output.
ps::ptime t(ps::second_clock::local_time()); std::string foo = ps::to_simple_string(t); ----------------------------------------------
by using it before the simple_string call. I am sure this is wrong but I wouldn't like to use streams in addition to that to simply rearange some parts of a date for that reason. The point of the to_simple_string() function is that it is simple. It provides quick and canonical (YYYY-mmm-DD HH:MM:SS.fffffffff) string representation of a date. If you want something else, you will have to use ostringstream, imbue it with locale with date_facet that produces your desired formatting.
thanks sam
-- VH