std::setw() is ignored by operator<< for ptime, time_duration, and date

[Mark van Dijk <mark.van.dijk@…>]

The following complete program demonstrates the issue. when using operator<< to display a ptime/time_duration/date, then the setw() manipulator is ignored.

My development environment is boost 1.48, building a 32-bit app on Win7 (x64) under VS2008.

I consider this a cosmetic issue as there is a very simple work-aroud - simply manually convert the ptime/date/duration object to a string before inserting it into the ostream object.

#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <iomanip>
#include <iostream>
#include <string>


int main()
{

    boost::posix_time::ptime const now = boost::posix_time::second_clock::local_time();

    std::cout 
        << "\ncorrectly formatted: " << std::setw(40) << boost::posix_time::to_simple_string(now)
        << "\nptime:               " << std::setw(40) << now
        << "\ntime_duration:       " << std::setw(40) << now.date()
        << "\ndate:                " << std::setw(40) << now.time_of_day()
        << std::endl;
}