[Boost-users] [date_time] How to parse "5th" into day of month?

Subject: [Boost-users] [date_time] How to parse "5th" into day of month?
From: Adam Nielsen (adam.nielsen_at_[hidden])
Date: 2010-06-30 04:32:17

Hi all,

I'm a bit stuck with the date_time module.  I found a few examples 
(ironically from bug reports) since I couldn't find any on the Boost 
documentation site, as I am trying to parse a string in the format "Fri 
5th March 2010, 05:01pm" into a boost::gregorian::date structure.

Unfortunately I can't figure out how to get it to recognise "5th".  It 
works fine if the day is two digits, but for a single digit it returns 
the error "Day of month value is out of range 1..31"

My date string is "%a %e.. %B %Y" (not sure if the ".." is correct but 
it was the only way I could get it to ignore the "th" after the day - 
again, I couldn't find anything about doing that in the docs.)

Does anyone know whether it's possible to parse a date with a single 
digit day in it?  Some of the docs hint that it's possible and give 
sample dates in that format, but they don't include the matching format 
specifiers to use.

Here is my code:

std::string strDate = "Fri 5th March 2010, 05:01pm";
std::string format("%a %e.. %B %Y");
boost::date_time::format_date_parser<boost::gregorian::date, char>
   parser(format, std::locale("C"));
boost::date_time::special_values_parser<boost::gregorian::date, char>
   svp;
boost::gregorian::date d =
   parser.parse_date(strDate, format, svp);

std::cout << "Converted date from \"" << strDate
   << "\" to " << d << std::endl;

Any suggestions would be much appreciated, or pointers to the correct 
documentation because I'm having real trouble finding where this sort of 
thing is explained :-(

Many thanks,
Adam.