116 lines
4.1 KiB
XML
116 lines
4.1 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.localization">
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<title>Localization Demonstration</title>
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<para>
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The boost::date_time library provides the ability to create customized locale facets. Date ordering, language, seperators, and abbreviations can be customized.
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</para>
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<!-- <para>
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This example uses the new (as of 1.33) date_time IO code. An example using the old code is also provided to demonstrate how much easier customized output is (see <link linkend="date_time.examples.legacy_localization">legacy_localization example</link>).
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</para> -->
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<programlisting>
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<![CDATA[
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/* The following shows the creation of a facet for the output of
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* dates in German (please forgive me for any errors in my German --
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* I'm not a native speaker).
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*/
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#include "boost/date_time/gregorian/gregorian.hpp"
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#include <iostream>
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#include <algorithm>
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/* Define a series of char arrays for short and long name strings
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* to be associated with German date output (US names will be
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* retrieved from the locale). */
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const char* const de_short_month_names[] =
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{
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"Jan", "Feb", "Mar", "Apr", "Mai", "Jun",
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"Jul", "Aug", "Sep", "Okt", "Nov", "Dez", "NAM"
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};
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const char* const de_long_month_names[] =
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{
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"Januar", "Februar", "Marz", "April", "Mai",
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"Juni", "Juli", "August", "September", "Oktober",
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"November", "Dezember", "NichtDerMonat"
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};
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const char* const de_long_weekday_names[] =
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{
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"Sonntag", "Montag", "Dienstag", "Mittwoch",
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"Donnerstag", "Freitag", "Samstag"
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};
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const char* const de_short_weekday_names[] =
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{
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"Son", "Mon", "Die","Mit", "Don", "Fre", "Sam"
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};
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int main()
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{
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using namespace boost::gregorian;
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// create some gregorian objects to output
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date d1(2002, Oct, 1);
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greg_month m = d1.month();
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greg_weekday wd = d1.day_of_week();
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// create a facet and a locale for German dates
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date_facet* german_facet = new date_facet();
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std::cout.imbue(std::locale(std::locale::classic(), german_facet));
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// create the German name collections
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date_facet::input_collection_type short_months, long_months,
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short_weekdays, long_weekdays;
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std::copy(&de_short_month_names[0], &de_short_month_names[11],
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std::back_inserter(short_months));
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std::copy(&de_long_month_names[0], &de_long_month_names[11],
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std::back_inserter(long_months));
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std::copy(&de_short_weekday_names[0], &de_short_weekday_names[6],
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std::back_inserter(short_weekdays));
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std::copy(&de_long_weekday_names[0], &de_long_weekday_names[6],
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std::back_inserter(long_weekdays));
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// replace the default names with ours
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// NOTE: date_generators and special_values were not replaced as
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// they are not used in this example
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german_facet->short_month_names(short_months);
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german_facet->long_month_names(long_months);
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german_facet->short_weekday_names(short_weekdays);
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german_facet->long_weekday_names(long_weekdays);
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// output the date in German using short month names
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german_facet->format("%d.%m.%Y");
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std::cout << d1 << std::endl; //01.10.2002
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german_facet->month_format("%B");
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std::cout << m << std::endl; //Oktober
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german_facet->weekday_format("%A");
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std::cout << wd << std::endl; //Dienstag
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// Output the same gregorian objects using US names
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date_facet* us_facet = new date_facet();
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std::cout.imbue(std::locale(std::locale::classic(), us_facet));
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us_facet->format("%m/%d/%Y");
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std::cout << d1 << std::endl; // 10/01/2002
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// English names, iso order (year-month-day), '-' separator
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us_facet->format("%Y-%b-%d");
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std::cout << d1 << std::endl; // 2002-Oct-01
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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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