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