Return the (signed) number of days between the specified beginDate and endDate according to the ISMA 30/360 day-count convention. If beginDate <= endDate, then the result is non-negative. Note that reversing the order of beginDate and endDate negates the result.
Declared in <bbldc_basicisma30360.h>
static
int
daysDiff(
bdlt::Date const& beginDate,
bdlt::Date const& endDate);