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+ title: Types
+ description: Libdate API documentation.
+ pkg date =
+ type instant = struct
+ actual : std.time /* epoch time in microseconds */
+ tzoff : duration /* timezone offset in microseconds */
+ year : int /* year, != 0 */
+ mon : int /* month, [1..12] */
+ day : int /* day, [1..31] */
+ wday : int /* weekday, [0..6] */
+ h : int /* hour: [0..23] */
+ m : int /* minute: [0..59] */
+ s : int /* second: [0..59] */
+ us : int /* microsecond: [0..999,999] */
+ tzname : byte[:] /* current time zone name */
+ type duration = std.time
+ type period = union
+ `Year int
+ `Month int
+ `Day int
+ `Hour int
+ `Minute int
+ `Second int
+ type instant
+Instant represents a single instant of time, with a resolution
+of microseconds. It contains the actual instant in the member
+`actual`, which is a timestamp in microseconds since Jan 1, 1970
+at 00:00 in UTC, and breaks out the "humanized" time out into the
+various members that are exposed.
+The instant type always has a timezone attached, and the humanized
+time components are always in that timezone.
+ type duration
+A duration is an absolute number of microseconds that can be added
+or subtracted from an instant. This is not timezone adjusted.
+ type period
+A period is a time delta that is adjusted for crossing timezones,
+daylight savings, and other similar events. If you add a day to
+an instant, you would get the same wallclock time the next day,
+should that wallclock time exist.
+For example, if I were to add `\`Day 2` to the instant
+`Oct 31 2015 3:00`, then the result would be the date
+`Nov 2 2015 3:00`, regardless of the daylight savings time adjustment.
+However, adding `\`Hour 48` would not have that effect.
+In cases where the adjustment does not exist -- for example, leap years,
+then the time will "wrap around" to the next available day. For example,
+Feb 29th on a leap year will become Mar 1st.