time: add documentation for time-related functions and ISO 8601 parsing

vlib/time/parse.js.v

@@ -19,6 +19,11 @@ pub fn parse(s string) Time {
 	return res
 }
 
+// parse_iso8601 parses the ISO 8601 time format yyyy-MM-ddTHH:mm:ss.dddddd+dd:dd as local time.
+// The fraction part is difference in milli seconds, and the last part is offset from UTC time.
+// Both can be +/- HH:mm .
+// See https://en.wikipedia.org/wiki/ISO_8601 .
+// Remarks: not all of ISO 8601 is supported; checks and support for leapseconds should be added.
 pub fn parse_iso8601(s string) !Time {
 	return parse(s)
 }

vlib/time/time.js.v

@@ -1,5 +1,6 @@
 module time
 
+// now returns the current local time.
 pub fn now() Time {
 	mut res := Time{}
 	#let date = new Date()
@@ -15,6 +16,7 @@ pub fn now() Time {
 	return res
 }
 
+// utc returns the current UTC time.
 pub fn utc() Time {
 	mut res := Time{}
 	#let date = new Date()
@@ -61,6 +63,8 @@ fn time_with_unix(t Time) Time {
 	return res
 }
 
+// ticks returns the number of milliseconds since the UNIX epoch.
+// // On Windows ticks returns the number of milliseconds elapsed since system start.
 pub fn ticks() i64 {
 	t := i64(0)
 	#t.val = BigInt(new Date().getTime())

vlib/time/time.v

@@ -84,6 +84,7 @@ pub enum FormatDelimiter {
 	no_delimiter
 }
 
+// new returns a time struct with the calculated Unix time.
 pub fn Time.new(t Time) Time {
 	return time_with_unix(t)
 }