[Haskell-cafe] bug in time libs?

[sam lee]

I can't find document for System.Time .

But I can import System.Time . It's weird...
I can't find document for TimeDiff and related functions. I guess this
is all deprecated.

A related bug report: http://hackage.haskell.org/trac/ghc/ticket/2519

I would use Data.Time.Clock

Prelude> :m + Data.Time.Clock
Prelude Data.Time.Clock> getCurrentTime
Prelude Data.Time.Clock> t0 <- getCurrentTime
Prelude Data.Time.Clock> t1 <- getCurrentTime
Prelude Data.Time.Clock> t0
Prelude Data.Time.Clock> diffUTCTime t0 t1
-2.912s
Prelude Data.Time.Clock> diffUTCTime t1 t0
2.912s
Prelude Data.Time.Clock> :t diffUTCTime t1 t0
diffUTCTime t1 t0 :: NominalDiffTime

On Mon, Dec 1, 2008 at 10:05 PM, Jason Dusek <jason.dusek at gmail.com> wrote:
>  I'm on 6.10.1, using the libs provided with the binary of GHC
>  for Mac OS X. I was fooling around with the time package in
>  GHCi and something seems to be off. I have included a
>  transcript.
>
>  If I take a time diff, then the seconds are positive when the
>  picos are negative and vice versa.
>
> --
> _jsn
>
>
>  |...transcript...|
>
>
>  Prelude System.Time> :m + System.Time
>  Prelude System.Time> t0 <- System.Time.getClockTime
>  Prelude System.Time> t1 <- System.Time.getClockTime
>  Prelude System.Time> diffClockTimes t0 t1
>  TimeDiff { tdYear = 0
>           , tdMonth = 0
>           , tdDay = 0
>           , tdHour = 0
>           , tdMin = 0
>           , tdSec = -7
>           , tdPicosec = 238846000000
>           }
>  Prelude System.Time> diffClockTimes t1 t0
>  TimeDiff { tdYear = 0
>           , tdMonth = 0
>           , tdDay = 0
>           , tdHour = 0
>           , tdMin = 0
>           , tdSec = 7
>           , tdPicosec = -238846000000
>           }
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