The interval to check for against this interval.
std.datetime.date.DateTimeException if this interval is empty.
assert(!Interval!Date(Date(1996, 1, 2), Date(2012, 3, 1)).isBefore( PosInfInterval!Date(Date(1999, 5, 4)))); assert(Interval!Date(Date(1996, 1, 2), Date(2012, 3, 1)).isBefore( PosInfInterval!Date(Date(2013, 3, 7))));
Whether this interval is before the given interval and does not intersect with it.