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266 lines
11 KiB
C++
266 lines
11 KiB
C++
#ifndef _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___
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#define _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___
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/* Copyright (c) 2004 CrystalClear Software, Inc.
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* Use, modification and distribution is subject to the
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* Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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* Author: Jeff Garland, Bart Garst
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* $Date$
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*/
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#include <iostream>
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#include <string>
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#include <vector>
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#include <algorithm>
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#include "boost/date_time/date_generators.hpp"
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namespace boost {
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namespace date_time {
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//! Formats date_generators for output
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/*! Formatting of date_generators follows specific orders for the
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* various types of date_generators.
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* - partial_date => "dd Month"
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* - nth_day_of_the_week_in_month => "nth weekday of month"
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* - first_day_of_the_week_in_month => "first weekday of month"
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* - last_day_of_the_week_in_month => "last weekday of month"
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* - first_day_of_the_week_after => "weekday after"
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* - first_day_of_the_week_before => "weekday before"
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* While the order of the elements in these phrases cannot be changed,
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* the elements themselves can be. Weekday and Month get their formats
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* and names from the date_facet. The remaining elements are stored in
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* the date_generator_formatter and can be customized upon construction
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* or via a member function. The default elements are those shown in the
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* examples above.
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*/
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template <class date_type, class CharT, class OutItrT = std::ostreambuf_iterator<CharT, std::char_traits<CharT> > >
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class date_generator_formatter {
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public:
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typedef partial_date<date_type> partial_date_type;
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typedef nth_kday_of_month<date_type> nth_kday_type;
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typedef first_kday_of_month<date_type> first_kday_type;
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typedef last_kday_of_month<date_type> last_kday_type;
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typedef first_kday_after<date_type> kday_after_type;
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typedef first_kday_before<date_type> kday_before_type;
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typedef CharT char_type;
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typedef std::basic_string<char_type> string_type;
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typedef std::vector<string_type> collection_type;
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static const char_type first_string[6];
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static const char_type second_string[7];
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static const char_type third_string[6];
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static const char_type fourth_string[7];
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static const char_type fifth_string[6];
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static const char_type last_string[5];
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static const char_type before_string[8];
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static const char_type after_string[6];
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static const char_type of_string[3];
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enum phrase_elements {first=0, second, third, fourth, fifth, last,
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before, after, of, number_of_phrase_elements};
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//! Default format elements used
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date_generator_formatter()
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{
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phrase_strings.reserve(number_of_phrase_elements);
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phrase_strings.push_back(string_type(first_string));
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phrase_strings.push_back(string_type(second_string));
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phrase_strings.push_back(string_type(third_string));
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phrase_strings.push_back(string_type(fourth_string));
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phrase_strings.push_back(string_type(fifth_string));
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phrase_strings.push_back(string_type(last_string));
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phrase_strings.push_back(string_type(before_string));
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phrase_strings.push_back(string_type(after_string));
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phrase_strings.push_back(string_type(of_string));
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}
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//! Constructor that allows for a custom set of phrase elements
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date_generator_formatter(const string_type& first_str,
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const string_type& second_str,
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const string_type& third_str,
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const string_type& fourth_str,
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const string_type& fifth_str,
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const string_type& last_str,
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const string_type& before_str,
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const string_type& after_str,
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const string_type& of_str)
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{
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phrase_strings.reserve(number_of_phrase_elements);
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phrase_strings.push_back(first_str);
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phrase_strings.push_back(second_str);
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phrase_strings.push_back(third_str);
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phrase_strings.push_back(fourth_str);
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phrase_strings.push_back(fifth_str);
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phrase_strings.push_back(last_str);
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phrase_strings.push_back(before_str);
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phrase_strings.push_back(after_str);
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phrase_strings.push_back(of_str);
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}
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//! Replace the set of phrase elements with those contained in new_strings
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/*! The order of the strings in the given collection is important.
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* They must follow:
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* - first, second, third, fourth, fifth, last, before, after, of.
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*
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* It is not necessary to send in a complete set if only a few
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* elements are to be replaced as long as the correct beg_pos is used.
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*
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* Ex: To keep the default first through fifth elements, but replace
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* the rest with a collection of:
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* - "final", "prior", "following", "in".
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* The beg_pos of date_generator_formatter::last would be used.
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*/
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void elements(const collection_type& new_strings,
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phrase_elements beg_pos=first)
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{
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if(beg_pos < number_of_phrase_elements) {
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typename collection_type::iterator itr = phrase_strings.begin();
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itr += beg_pos;
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std::copy(new_strings.begin(), new_strings.end(),
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itr);
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//phrase_strings.begin());
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}
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}
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//!Put a partial_date => "dd Month"
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template<class facet_type>
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OutItrT put_partial_date(OutItrT next, std::ios_base& a_ios,
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CharT a_fill, const partial_date_type& pd,
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const facet_type& facet) const
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{
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facet.put(next, a_ios, a_fill, pd.day());
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, pd.month());
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return next;
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}
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//! Put an nth_day_of_the_week_in_month => "nth weekday of month"
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template<class facet_type>
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OutItrT put_nth_kday(OutItrT next, std::ios_base& a_ios,
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CharT a_fill, const nth_kday_type& nkd,
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const facet_type& facet) const
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{
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put_string(next, phrase_strings[nkd.nth_week() -1]);
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, nkd.day_of_week());
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next = a_fill; //TODO change this ???
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put_string(next, string_type(of_string));
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, nkd.month());
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return next;
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}
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//! Put a first_day_of_the_week_in_month => "first weekday of month"
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template<class facet_type>
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OutItrT put_first_kday(OutItrT next, std::ios_base& a_ios,
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CharT a_fill, const first_kday_type& fkd,
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const facet_type& facet) const
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{
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put_string(next, phrase_strings[first]);
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, fkd.day_of_week());
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next = a_fill; //TODO change this ???
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put_string(next, string_type(of_string));
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, fkd.month());
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return next;
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}
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//! Put a last_day_of_the_week_in_month => "last weekday of month"
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template<class facet_type>
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OutItrT put_last_kday(OutItrT next, std::ios_base& a_ios,
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CharT a_fill, const last_kday_type& lkd,
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const facet_type& facet) const
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{
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put_string(next, phrase_strings[last]);
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, lkd.day_of_week());
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next = a_fill; //TODO change this ???
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put_string(next, string_type(of_string));
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next = a_fill; //TODO change this ???
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facet.put(next, a_ios, a_fill, lkd.month());
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return next;
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}
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//! Put a first_day_of_the_week_before => "weekday before"
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template<class facet_type>
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OutItrT put_kday_before(OutItrT next, std::ios_base& a_ios,
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CharT a_fill, const kday_before_type& fkb,
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const facet_type& facet) const
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{
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facet.put(next, a_ios, a_fill, fkb.day_of_week());
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next = a_fill; //TODO change this ???
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put_string(next, phrase_strings[before]);
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return next;
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}
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//! Put a first_day_of_the_week_after => "weekday after"
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template<class facet_type>
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OutItrT put_kday_after(OutItrT next, std::ios_base& a_ios,
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CharT a_fill, const kday_after_type& fka,
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const facet_type& facet) const
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{
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facet.put(next, a_ios, a_fill, fka.day_of_week());
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next = a_fill; //TODO change this ???
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put_string(next, phrase_strings[after]);
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return next;
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}
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private:
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collection_type phrase_strings;
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//! helper function to put the various member string into stream
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OutItrT put_string(OutItrT next, const string_type& str) const
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{
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typename string_type::const_iterator itr = str.begin();
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while(itr != str.end()) {
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*next = *itr;
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++itr;
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++next;
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}
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return next;
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}
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};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::first_string[6] =
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{'f','i','r','s','t'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::second_string[7] =
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{'s','e','c','o','n','d'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::third_string[6] =
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{'t','h','i','r','d'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::fourth_string[7] =
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{'f','o','u','r','t','h'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::fifth_string[6] =
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{'f','i','f','t','h'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::last_string[5] =
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{'l','a','s','t'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::before_string[8] =
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{'b','e','f','o','r','e'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::after_string[6] =
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{'a','f','t','e','r'};
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template<class date_type, class CharT, class OutItrT>
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const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type
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date_generator_formatter<date_type, CharT, OutItrT>::of_string[3] =
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{'o','f'};
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} } // namespaces
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#endif // _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___
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