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// https://www.boost.org/doc/libs/1_67_0/doc/html/date_time/examples.html#date_time.examples.dates_as_strings
/* The following is a simple example that shows conversion of dates
* to and from a std::string.
*
* Expected output:
* 2001-Oct-09
* 2001-10-09
* Tuesday October 9, 2001
* An expected exception is next:
* Exception: Month number is out of range 1..12
*/
#include "boost/date_time/gregorian/gregorian.hpp"
#include <iostream>
#include <string>
int main()
{
using namespace boost::gregorian;
try
{
// The following date is in ISO 8601 extended format (CCYY-MM-DD)
std::string s("2001-10-9"); //2001-October-09
date d(from_simple_string(s));
std::cout << to_simple_string(d) << std::endl;
//Read ISO Standard(CCYYMMDD) and output ISO Extended
std::string ud("20011009"); //2001-Oct-09
date d1(from_undelimited_string(ud));
std::cout << to_iso_extended_string(d1) << std::endl;
//Output the parts of the date - Tuesday October 9, 2001
date::ymd_type ymd = d1.year_month_day();
greg_weekday wd = d1.day_of_week();
std::cout << wd.as_long_string() << " "
<< ymd.month.as_long_string() << " "
<< ymd.day << ", " << ymd.year
<< std::endl;
//Let's send in month 25 by accident and create an exception
std::string bad_date("20012509"); //2001-??-09
std::cout << "An expected exception is next: " << std::endl;
date wont_construct(from_undelimited_string(bad_date));
//use wont_construct so compiler doesn't complain, but you wont get here!
std::cout << "oh oh, you shouldn't reach this line: "
<< to_iso_string(wont_construct) << std::endl;
}
catch (std::exception &e)
{
std::cout << " Exception: " << e.what() << std::endl;
}
return 0;
}
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