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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
"../../../tools/boostbook/dtd/boostbook.dtd">
<!-- Copyright (c) 2001-2005 CrystalClear Software, Inc.
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)
-->
<section id="date_time.examples.calc_rules">
<title>Daylight Savings Calc Rules</title>
<para>
Example of creating various Daylight Savings Calc Rule objects.
</para>
<programlisting>
<![CDATA[
/* A simple example for creating various dst_calc_rule instances
*/
#include "boost/date_time/gregorian/gregorian.hpp"
#include "boost/date_time/local_time/local_time.hpp"
#include <iostream>
int
main()
{
using namespace boost;
using namespace local_time;
using namespace gregorian;
/***** create the necessary date_generator objects *****/
// starting generators
first_day_of_the_week_in_month fd_start(Sunday, May);
last_day_of_the_week_in_month ld_start(Sunday, May);
nth_day_of_the_week_in_month nkd_start(nth_day_of_the_week_in_month::third,
Sunday, May);
partial_date pd_start(1, May);
// ending generators
first_day_of_the_week_in_month fd_end(Sunday, Oct);
last_day_of_the_week_in_month ld_end(Sunday, Oct);
nth_day_of_the_week_in_month nkd_end(nth_day_of_the_week_in_month::third,
Sunday, Oct);
partial_date pd_end(31, Oct);
/***** create the various dst_calc_rule objects *****/
dst_calc_rule_ptr pdr(new partial_date_dst_rule(pd_start, pd_end));
dst_calc_rule_ptr flr(new first_last_dst_rule(fd_start, ld_end));
dst_calc_rule_ptr llr(new last_last_dst_rule(ld_start, ld_end));
dst_calc_rule_ptr nlr(new nth_last_dst_rule(nkd_start, ld_end));
dst_calc_rule_ptr ndr(new nth_day_of_the_week_in_month_dst_rule(nkd_start,
nkd_end));
return 0;
}
]]>
</programlisting>
</section>
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