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type datetime = {
Year : int,
Month : int,
Day : int,
Hour : int,
Minute : int,
Second : int
}
datatype day_of_week = Sunday | Monday | Tuesday | Wednesday | Thursday |
Friday | Saturday
val show = mkShow (fn dow => case dow of
Sunday => "Sunday"
| Monday => "Monday"
| Tuesday => "Tuesday"
| Wednesday => "Wednesday"
| Thursday => "Thursday"
| Friday => "Friday"
| Saturday => "Saturday")
fun toTime dt : time = fromDatetime dt.Year dt.Month dt.Day
dt.Hour dt.Minute dt.Second
fun fromTime t : datetime = {
Year = datetimeYear t,
Month = datetimeMonth t,
Day = datetimeDay t,
Hour = datetimeHour t,
Minute = datetimeMinute t,
Second = datetimeSecond t
}
fun datetimef fmt dt : string = timef fmt (toTime dt)
val now : transaction datetime =
n <- now;
return (fromTime n)
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