/*! 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());
}
/*! Subtracts a months object and a ptime. Result will be same
* day-of-month as ptime unless original day was the last day of month.
* see date_time::months_duration for more details */
inline
ptime
operator-(const ptime& t, const boost::gregorian::months& m)
{
// get_neg_offset returns a negative duration, so we add
return t + m.get_neg_offset(t.date());
}
/*! Subtracts a months object from a ptime. Result will be same
* day-of-month as ptime unless original day was the last day of month.
* see date_time::months_duration for more details */
inline
ptime
operator-=(ptime& t, const boost::gregorian::months& m)
{
return t += m.get_neg_offset(t.date());
}