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// https://www.boost.org/doc/libs/1_67_0/doc/html/date_time/examples.html#date_time.examples.print_holidays
/* Generate a set of dates using a collection of date generators
* Output looks like:
* Enter Year: 2002
* 2002-Jan-01 [Tue]
* 2002-Jan-21 [Mon]
* 2002-Feb-12 [Tue]
* 2002-Jul-04 [Thu]
* 2002-Sep-02 [Mon]
* 2002-Nov-28 [Thu]
* 2002-Dec-25 [Wed]
* Number Holidays: 7
*/
#include "boost/date_time/gregorian/gregorian.hpp"
#include <algorithm>
#include <functional>
#include <vector>
#include <iostream>
#include <set>
void print_date(boost::gregorian::date d)
{
using namespace boost::gregorian;
#if defined(BOOST_DATE_TIME_NO_LOCALE)
std::cout << to_simple_string(d) << " [" << d.day_of_week() << "]\n";
#else
std::cout << d << " [" << d.day_of_week() << "]\n";
#endif
}
int main()
{
const int year = 2018;
std::cout << "Year: " << year;
using namespace boost::gregorian;
//define a collection of holidays fixed by month and day
std::vector<year_based_generator *> holidays;
holidays.push_back(new partial_date(1, Jan)); //Western New Year
holidays.push_back(new partial_date(4, Jul)); //US Independence Day
holidays.push_back(new partial_date(25, Dec)); //Christmas day
//define a shorthand for the nth_day_of_the_week_in_month function object
typedef nth_day_of_the_week_in_month nth_dow;
//US labor day
holidays.push_back(new nth_dow(nth_dow::first, Monday, Sep));
//MLK Day
holidays.push_back(new nth_dow(nth_dow::third, Monday, Jan));
//Pres day
holidays.push_back(new nth_dow(nth_dow::second, Tuesday, Feb));
//Thanksgiving
holidays.push_back(new nth_dow(nth_dow::fourth, Thursday, Nov));
typedef std::set<date> date_set;
date_set all_holidays;
for (std::vector<year_based_generator *>::iterator it = holidays.begin();
it != holidays.end(); ++it)
{
all_holidays.insert((*it)->get_date(year));
}
//print the holidays to the screen
std::for_each(all_holidays.begin(), all_holidays.end(), print_date);
std::cout << "Number Holidays: " << all_holidays.size() << std::endl;
return 0;
}
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