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