Chris@16: /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
Chris@16:  * Use, modification and distribution is subject to the 
Chris@16:  * Boost Software License, Version 1.0. (See accompanying
Chris@16:  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  * Author: Jeff Garland, Bart Garst
Chris@16:  */
Chris@16: #ifndef DATE_TIME_DATE_DST_TRANSITION_DAY_GEN_HPP__
Chris@16: #define DATE_TIME_DATE_DST_TRANSITION_DAY_GEN_HPP__
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace date_time {
Chris@16: 
Chris@16:     //! Defines base interface for calculating start and end date of daylight savings 
Chris@16:     template<class date_type>
Chris@16:     class dst_day_calc_rule 
Chris@16:     {
Chris@16:     public:
Chris@16:       typedef typename date_type::year_type year_type;
Chris@16:       virtual ~dst_day_calc_rule() {}
Chris@16:       virtual date_type start_day(year_type y) const=0;
Chris@16:       virtual std::string start_rule_as_string() const=0;
Chris@16:       virtual date_type end_day(year_type y) const=0;
Chris@16:       virtual std::string end_rule_as_string() const=0;
Chris@16: 
Chris@16:     };
Chris@16: 
Chris@16:     //! Canonical form for a class that provides day rule calculation
Chris@16:     /*! This class is used to generate specific sets of dst rules
Chris@16:      *  
Chris@16:      *@param spec Provides a specifiction of the function object types used
Chris@16:      *            to generate start and end days of daylight savings as well
Chris@16:      *            as the date type.
Chris@16:      */
Chris@16:     template<class spec>
Chris@16:     class day_calc_dst_rule : public dst_day_calc_rule<typename spec::date_type>
Chris@16:     {
Chris@16:     public:
Chris@16:       typedef typename spec::date_type date_type;
Chris@16:       typedef typename date_type::year_type year_type;
Chris@16:       typedef typename spec::start_rule start_rule;
Chris@16:       typedef typename spec::end_rule  end_rule;
Chris@16:       day_calc_dst_rule(start_rule dst_start,
Chris@16:                         end_rule dst_end) :
Chris@16:         dst_start_(dst_start),
Chris@16:         dst_end_(dst_end)
Chris@16:       {}
Chris@16:       virtual date_type start_day(year_type y) const
Chris@16:       {
Chris@16:         return dst_start_.get_date(y);
Chris@16:       }
Chris@16:       virtual std::string start_rule_as_string() const
Chris@16:       {
Chris@16:         return dst_start_.to_string();
Chris@16:       }
Chris@16:       virtual date_type end_day(year_type y) const
Chris@16:       {
Chris@16:         return dst_end_.get_date(y);
Chris@16:       }
Chris@16:       virtual std::string end_rule_as_string() const
Chris@16:       {
Chris@16:         return dst_end_.to_string();
Chris@16:       }
Chris@16:     private:
Chris@16:       start_rule dst_start_;
Chris@16:       end_rule dst_end_;
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16: } }//namespace
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #endif