Re: [Boost-users] [date_time] how to parse "1/13/2006"

From: Markus Werle (numerical.simulation_at_[hidden])
Date: 2006-12-06 08:52:05

Markus Werle <numerical.simulation <at> web.de> writes:

> 
> Hi!
> 
> I have to read in a file format where the date is given as
> month/day/year, but without leading '0' for day and month.
> >From http://boost.org/doc/html/date_time/date_time_io.html I could not
> guess how to declare the facet format string (No leading zeroes required)
> 
> Could you please complete the following code?
> 
> std::istringstream iss;
> local_time_input_facet* input_facet = new local_time_input_facet();
> ss.imbue(locale(ss.getloc(), input_facet));
> input_facet->format("???????");
> 

Though the docs do not state it, the leading zeores can be omitted during
read in, so the output of

#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/date_time/local_time/local_time.hpp>

#include <iostream>
#include <sstream>

int main()
{
        try
        {
                using namespace boost::posix_time;
                using namespace boost::gregorian;
                using namespace boost::local_time;

                std::istringstream iss("1/13/2006");
                local_time_input_facet* input_facet = new local_time_input_facet();
                iss.imbue(std::locale(iss.getloc(), input_facet));
                input_facet->format("%m/%d/%Y");
                
                ptime p;
                iss >> p;
                std::cout << p << std::endl;
        }
        catch (std::exception const & e)
        {
        std::cerr << e.what() << std::endl;
        }
        catch (...)
        {
                std::cerr << "CRASH!!" << std::endl;
        }
}

is 

2006-Jan-13 00:00:00