| #ifndef LOCAL_TIME_DATE_DURATION_OPERATORS_HPP___ |
| #define LOCAL_TIME_DATE_DURATION_OPERATORS_HPP___ |
| |
| /* Copyright (c) 2004 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) |
| * Author: Jeff Garland, Bart Garst |
| * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ |
| */ |
| |
| #include "boost/date_time/gregorian/greg_duration_types.hpp" |
| #include "boost/date_time/local_time/local_date_time.hpp" |
| |
| namespace boost { |
| namespace local_time { |
| |
| /*!@file date_duration_operators.hpp Operators for local_date_time and |
| * optional gregorian types. Operators use snap-to-end-of-month behavior. |
| * Further details on this behavior can be found in reference for |
| * date_time/date_duration_types.hpp and documentation for |
| * month and year iterators. |
| */ |
| |
| |
| /*! Adds a months object and a local_date_time. Result will be same |
| * day-of-month as local_date_time unless original day was the last day of month. |
| * see date_time::months_duration for more details */ |
| inline |
| local_date_time |
| operator+(const local_date_time& t, const boost::gregorian::months& m) |
| { |
| return t + m.get_offset(t.utc_time().date()); |
| } |
| |
| /*! Adds a months object to a local_date_time. Result will be same |
| * day-of-month as local_date_time unless original day was the last day of month. |
| * see date_time::months_duration for more details */ |
| inline |
| local_date_time |
| operator+=(local_date_time& t, const boost::gregorian::months& m) |
| { |
| return t += m.get_offset(t.utc_time().date()); |
| } |
| |
| /*! Subtracts a months object and a local_date_time. Result will be same |
| * day-of-month as local_date_time unless original day was the last day of month. |
| * see date_time::months_duration for more details */ |
| inline |
| local_date_time |
| operator-(const local_date_time& t, const boost::gregorian::months& m) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return t + m.get_neg_offset(t.utc_time().date()); |
| } |
| |
| /*! Subtracts a months object from a local_date_time. Result will be same |
| * day-of-month as local_date_time unless original day was the last day of month. |
| * see date_time::months_duration for more details */ |
| inline |
| local_date_time |
| operator-=(local_date_time& t, const boost::gregorian::months& m) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return t += m.get_neg_offset(t.utc_time().date()); |
| } |
| |
| // local_date_time & years |
| |
| /*! Adds a years object and a local_date_time. Result will be same |
| * month and day-of-month as local_date_time unless original day was the |
| * last day of month. see date_time::years_duration for more details */ |
| inline |
| local_date_time |
| operator+(const local_date_time& t, const boost::gregorian::years& y) |
| { |
| return t + y.get_offset(t.utc_time().date()); |
| } |
| |
| /*! Adds a years object to a local_date_time. Result will be same |
| * month and day-of-month as local_date_time unless original day was the |
| * last day of month. see date_time::years_duration for more details */ |
| inline |
| local_date_time |
| operator+=(local_date_time& t, const boost::gregorian::years& y) |
| { |
| return t += y.get_offset(t.utc_time().date()); |
| } |
| |
| /*! Subtracts a years object and a local_date_time. Result will be same |
| * month and day-of-month as local_date_time unless original day was the |
| * last day of month. see date_time::years_duration for more details */ |
| inline |
| local_date_time |
| operator-(const local_date_time& t, const boost::gregorian::years& y) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return t + y.get_neg_offset(t.utc_time().date()); |
| } |
| |
| /*! Subtracts a years object from a local_date_time. Result will be same |
| * month and day-of-month as local_date_time unless original day was the |
| * last day of month. see date_time::years_duration for more details */ |
| inline |
| local_date_time |
| operator-=(local_date_time& t, const boost::gregorian::years& y) |
| { |
| // get_neg_offset returns a negative duration, so we add |
| return t += y.get_neg_offset(t.utc_time().date()); |
| } |
| |
| |
| }} // namespaces |
| |
| #endif // LOCAL_TIME_DATE_DURATION_OPERATORS_HPP___ |