On Wed, 12 May 2004 11:07:25 +0200, Richard Peters wrote
----- Original Message ----- From: "Jeff Garland" <jeff@crystalclearsoftware.com> ...snip...
rules you want to apply. So for representing durations you currently only have days, hours, minutes, and seconds.
Such functionality would come very handy at times, though. Say you want something to occur every first day of the month. You'd want a start date which is the first day of a month, and increase that date with one month to reach the next month. This is currently very difficult, because the next date has to be calculated manually. It would be nice if a duration of a month or a year was available, although comparing the length of a month and the length of 30 days would be quite impossible.
Don't disagree, but I think we need to keep 'hard' in perspective. Non-obvious yes, but not hard. The following will trivially do what you want using namespace boost::gregorian; date add_years_months(date d, int years, int months) { int total_months = years*12 + months; month_iterator mi(d, total_months); ++mi; return *mi; } int main() { date d = add_years_months(date(2003,Jan,1), 2, 3); std::cout << d << std::endl; //April 1 2005 } Jeff