lean4-htt/tests/elab/timeClassOperations.lean
Sofia Rodrigues f67ea44b6a
feat: add WallTime and simplify Timestamp API (#13675)
This PR adds a `WallTime` type representing a point in time as
nanoseconds since `1970-01-01T00:00:00` local time. It also removes the
`sinceUNIXEpoch` and `AssumingUTC` suffixes because `Timestamp` implies
UTC, and `WallTime` implies it is based on the WallTime epoch (defined
in the comment as `1970-01-01T00:00:00`).

---------

Co-authored-by: Julia Markus Himmel <2065352+TwoFX@users.noreply.github.com>
2026-05-11 23:26:19 +00:00

188 lines
3.3 KiB
Text

import Std.Time
open Std.Time
def date := date("1970-01-20")
/--
info: date("1970-02-01")
-/
#guard_msgs in
#eval date + (12 : Day.Offset)
/--
info: date("1970-01-08")
-/
#guard_msgs in
#eval date - (12 : Day.Offset)
def datetime := datetime("2000-01-20T03:02:01")
/--
info: datetime("2000-01-20T04:02:01.000000000")
-/
#guard_msgs in
#eval datetime + (1 : Hour.Offset)
/--
info: datetime("2000-01-20T02:02:01.000000000")
-/
#guard_msgs in
#eval datetime - (1 : Hour.Offset)
/--
info: datetime("2000-01-20T03:12:01.000000000")
-/
#guard_msgs in
#eval datetime + (10 : Minute.Offset)
/--
info: datetime("2000-01-20T02:52:01.000000000")
-/
#guard_msgs in
#eval datetime - (10 : Minute.Offset)
/--
info: datetime("2000-01-20T03:03:01.000000000")
-/
#guard_msgs in
#eval datetime + (60 : Second.Offset)
/--
info: datetime("2000-01-20T03:01:01.000000000")
-/
#guard_msgs in
#eval datetime - (60 : Second.Offset)
/--
info: datetime("2000-01-21T03:02:01.000000000")
-/
#guard_msgs in
#eval datetime + (1 : Day.Offset)
/--
info: datetime("2000-01-19T03:02:01.000000000")
-/
#guard_msgs in
#eval datetime - (1 : Day.Offset)
def time := time("13:02:01")
/--
info: time("14:02:01.000000000")
-/
#guard_msgs in
#eval time + (1 : Hour.Offset)
/--
info: time("12:02:01.000000000")
-/
#guard_msgs in
#eval time - (1 : Hour.Offset)
/--
info: time("13:12:01.000000000")
-/
#guard_msgs in
#eval time + (10 : Minute.Offset)
/--
info: time("12:52:01.000000000")
-/
#guard_msgs in
#eval time - (10 : Minute.Offset)
/--
info: time("13:03:01.000000000")
-/
#guard_msgs in
#eval time + (60 : Second.Offset)
/--
info: time("13:01:01.000000000")
-/
#guard_msgs in
#eval time - (60 : Second.Offset)
def datetimetz := zoned("2000-01-20T06:02:01-03:00")
/--
info: zoned("2000-01-20T06:02:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz
/--
info: zoned("2000-01-22T06:02:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz + (2 : Day.Offset)
/--
info: zoned("2000-01-19T06:02:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz - (1 : Day.Offset)
/--
info: zoned("2000-01-20T07:02:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz + (1 : Hour.Offset)
/--
info: zoned("2000-01-20T05:02:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz - (1 : Hour.Offset)
/--
info: zoned("2000-01-20T06:12:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz + (10 : Minute.Offset)
/--
info: zoned("2000-01-20T05:52:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz - (10 : Minute.Offset)
/--
info: zoned("2000-01-20T06:03:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz + (60 : Second.Offset)
/--
info: zoned("2000-01-20T06:01:01.000000000-03:00")
-/
#guard_msgs in
#eval datetimetz - (60 : Second.Offset)
/--
info: "3600s"
-/
#guard_msgs in
#eval zoned("2000-12-20T00:00:00-03:00") - zoned("2000-12-20T00:00:00-02:00")
def now := PlainDateTime.ofWallTime (WallTime.ofDuration ⟨1724859638, ⟨907328169, by decide⟩, by decide⟩)
def after := PlainDateTime.ofWallTime (WallTime.ofDuration ⟨1724859639, ⟨907641224, by decide⟩, by decide⟩)
def duration := after - now
/--
info: "15:40:38.907328169"
-/
#guard_msgs in
#eval now.format "HH:mm:ss.SSSSSSSSS"
/--
info: "15.40:39.907641224"
-/
#guard_msgs in
#eval after.format "HH.mm:ss.SSSSSSSSS"
/--
info: "1.000313055s"
-/
#guard_msgs in
#eval duration