Add high and low operators for Duration and Moment; Add Moment.epochS…

…econds and Moment.epochNanoSeconds

chronos/timer.nim

@@ -302,6 +302,18 @@ const
   ZeroDuration* = Duration(value: 0'i64)
   InfiniteDuration* = Duration(value: high(int64))
 
+template high*(T: typedesc[Moment]): Moment =
+  Moment(value: high(int64))
+
+template low*(T: typedesc[Moment]): Moment =
+  Moment(value: 0)
+
+template high*(T: typedesc[Duration]): Duration =
+  Duration(value: high(int64))
+
+template low*(T: typedesc[Duration]): Duration =
+  Duration(value: 0)
+
 func nanoseconds*(v: SomeIntegerI64): Duration {.inline.} =
   ## Initialize Duration with nanoseconds value ``v``.
   result.value = int64(v)
@@ -438,6 +450,12 @@ func init*(t: typedesc[Moment], value: int64, precision: Duration): Moment =
   ## ``precision``.
   result.value = value * precision.value
 
+func epochSeconds*(moment: Moment): int64 =
+  moment.value div Second.value
+
+func epochNanoSeconds*(moment: Moment): int64 =
+  moment.value
+
 proc fromNow*(t: typedesc[Moment], a: Duration): Moment {.inline.} =
   ## Returns moment in time which is equal to current moment + Duration.
   result = Moment.now() + a

tests/testtime.nim

@@ -11,6 +11,11 @@ import ../chronos, ../chronos/timer
 
 when defined(nimHasUsed): {.used.}
 
+static:
+  doAssert Moment.high - Moment.low == Duration.high
+  doAssert Moment.low.epochSeconds == 0
+  doAssert Moment.low.epochNanoSeconds == 0
+
 suite "Asynchronous timers & steps test suite":
   const TimersCount = 10