The interval to create a span together with this interval.
Note: There is no overload for span which takes a NegInfInterval, because an interval going from negative infinity to positive infinity is not possible.
assert(PosInfInterval!Date(Date(1996, 1, 2)).span( PosInfInterval!Date(Date(1990, 7, 6))) == PosInfInterval!Date(Date(1990, 7 , 6))); assert(PosInfInterval!Date(Date(1996, 1, 2)).span( PosInfInterval!Date(Date(1999, 1, 12))) == PosInfInterval!Date(Date(1996, 1 , 2)));
Returns an interval that covers from the earliest time point of two intervals up to (but not including) the latest time point of two intervals.