115 lines
3.8 KiB
Plaintext
115 lines
3.8 KiB
Plaintext
#ifndef DATE_DURATION_OPERATORS_HPP___
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#define DATE_DURATION_OPERATORS_HPP___
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/* Copyright (c) 2004 CrystalClear Software, Inc.
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* Subject to the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or
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* 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 "boost/date_time/gregorian/greg_duration_types.hpp"
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#include "boost/date_time/posix_time/ptime.hpp"
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namespace boost {
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namespace posix_time {
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/*!@file date_duration_operators.hpp Operators for ptime and
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* optional gregorian types. Operators use snap-to-end-of-month behavior.
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* Further details on this behavior can be found in reference for
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* date_time/date_duration_types.hpp and documentation for
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* month and year iterators.
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*/
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/*! Adds a months object and a ptime. Result will be same
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* day-of-month as ptime unless original day was the last day of month.
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* see date_time::months_duration for more details */
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inline
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ptime
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operator+(const ptime& t, const boost::gregorian::months& m)
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{
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return t + m.get_offset(t.date());
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}
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/*! Adds a months object to a ptime. Result will be same
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* day-of-month as ptime unless original day was the last day of month.
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* see date_time::months_duration for more details */
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inline
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ptime
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operator+=(ptime& t, const boost::gregorian::months& m)
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{
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// get_neg_offset returns a negative duration, so we add
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return t += m.get_offset(t.date());
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}
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/*! Subtracts a months object and a ptime. Result will be same
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* day-of-month as ptime unless original day was the last day of month.
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* see date_time::months_duration for more details */
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inline
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ptime
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operator-(const ptime& t, const boost::gregorian::months& m)
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{
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// get_neg_offset returns a negative duration, so we add
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return t + m.get_neg_offset(t.date());
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}
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/*! Subtracts a months object from a ptime. Result will be same
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* day-of-month as ptime unless original day was the last day of month.
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* see date_time::months_duration for more details */
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inline
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ptime
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operator-=(ptime& t, const boost::gregorian::months& m)
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{
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return t += m.get_neg_offset(t.date());
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}
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// ptime & years
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/*! Adds a years object and a ptime. Result will be same
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* month and day-of-month as ptime unless original day was the
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* last day of month. see date_time::years_duration for more details */
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inline
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ptime
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operator+(const ptime& t, const boost::gregorian::years& y)
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{
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return t + y.get_offset(t.date());
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}
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/*! Adds a years object to a ptime. Result will be same
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* month and day-of-month as ptime unless original day was the
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* last day of month. see date_time::years_duration for more details */
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inline
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ptime
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operator+=(ptime& t, const boost::gregorian::years& y)
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{
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return t += y.get_offset(t.date());
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}
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/*! Subtracts a years object and a ptime. Result will be same
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* month and day-of-month as ptime unless original day was the
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* last day of month. see date_time::years_duration for more details */
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inline
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ptime
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operator-(const ptime& t, const boost::gregorian::years& y)
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{
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// get_neg_offset returns a negative duration, so we add
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return t + y.get_neg_offset(t.date());
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}
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/*! Subtracts a years object from a ptime. Result will be same
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* month and day-of-month as ptime unless original day was the
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* last day of month. see date_time::years_duration for more details */
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inline
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ptime
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operator-=(ptime& t, const boost::gregorian::years& y)
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{
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// get_neg_offset returns a negative duration, so we add
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return t += y.get_neg_offset(t.date());
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}
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}} // namespaces
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#endif // DATE_DURATION_OPERATORS_HPP___
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