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libs/date_time/example/gregorian/print_holidays.cpp

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+/* 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() {
+
+  std::cout << "Enter Year: ";
+  int year;
+  std::cin >> 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;
+}
+
+/*  Copyright 2001-2004: CrystalClear Software, Inc
+ *  http://www.crystalclearsoftware.com
+ *
+ *  Subject to the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ */
+