Set the "date" part of this object to have the value represented by the specified year, month, and day attributes, and set the "time" part to have the value represented by the optionally specified hour, minute, second, millisecond, and microsecond attributes, if the eight attribute values (collectively) represent a valid Datetime value (see isValid). Unspecified trailing optional parameters default to 0. Return 0 on success, and a non-zero value (with no effect) otherwise.
Declared in <bdlt_datetime.h>
int
setDatetimeIfValid(
int year,
int month,
int day,
int hour = 0,
int minute = 0,
int second = 0,
int millisecond = 0,
int microsecond = 0);