60 lines
2.1 KiB
XML
60 lines
2.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN"
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"../../../tools/boostbook/dtd/boostbook.dtd">
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<!-- Copyright (c) 2001-2005 CrystalClear Software, Inc.
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Subject to the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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-->
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<section id="date_time.examples.calc_rules">
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<title>Daylight Savings Calc Rules</title>
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<para>
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Example of creating various Daylight Savings Calc Rule objects.
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</para>
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<programlisting>
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<![CDATA[
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/* A simple example for creating various dst_calc_rule instances
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*/
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#include "boost/date_time/gregorian/gregorian.hpp"
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#include "boost/date_time/local_time/local_time.hpp"
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#include <iostream>
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int
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main()
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{
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using namespace boost;
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using namespace local_time;
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using namespace gregorian;
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/***** create the necessary date_generator objects *****/
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// starting generators
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first_day_of_the_week_in_month fd_start(Sunday, May);
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last_day_of_the_week_in_month ld_start(Sunday, May);
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nth_day_of_the_week_in_month nkd_start(nth_day_of_the_week_in_month::third,
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Sunday, May);
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partial_date pd_start(1, May);
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// ending generators
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first_day_of_the_week_in_month fd_end(Sunday, Oct);
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last_day_of_the_week_in_month ld_end(Sunday, Oct);
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nth_day_of_the_week_in_month nkd_end(nth_day_of_the_week_in_month::third,
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Sunday, Oct);
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partial_date pd_end(31, Oct);
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/***** create the various dst_calc_rule objects *****/
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dst_calc_rule_ptr pdr(new partial_date_dst_rule(pd_start, pd_end));
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dst_calc_rule_ptr flr(new first_last_dst_rule(fd_start, ld_end));
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dst_calc_rule_ptr llr(new last_last_dst_rule(ld_start, ld_end));
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dst_calc_rule_ptr nlr(new nth_last_dst_rule(nkd_start, ld_end));
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dst_calc_rule_ptr ndr(new nth_day_of_the_week_in_month_dst_rule(nkd_start,
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nkd_end));
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return 0;
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}
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]]>
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</programlisting>
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</section>
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