Safe Haskell | Safe-Inferred |
---|---|
Language | Haskell2010 |
Control.Monad.Class.MonadTime
Synopsis
- class MonadMonotonicTime m => MonadTime m where
- getCurrentTime :: m UTCTime
- class Monad m => MonadMonotonicTime m where
- getMonotonicTime :: m Time
- newtype Time = Time DiffTime
- diffTime :: Time -> Time -> DiffTime
- addTime :: DiffTime -> Time -> Time
- data DiffTime
- data UTCTime
- diffUTCTime :: UTCTime -> UTCTime -> NominalDiffTime
- addUTCTime :: NominalDiffTime -> UTCTime -> UTCTime
- data NominalDiffTime
Documentation
class MonadMonotonicTime m => MonadTime m where Source #
class Monad m => MonadMonotonicTime m where Source #
Methods
getMonotonicTime :: m Time Source #
Time in a monotonic clock, with high precision. The epoch for this clock is arbitrary and does not correspond to any wall clock or calendar.
Instances
MonadMonotonicTime IO Source # | |
Defined in Control.Monad.Class.MonadTime Methods | |
MonadMonotonicTime m => MonadMonotonicTime (ReaderT r m) Source # | |
Defined in Control.Monad.Class.MonadTime Methods getMonotonicTime :: ReaderT r m Time Source # |
DiffTime
and its action on Time
A point in time in a monotonic clock.
The epoch for this clock is arbitrary and does not correspond to any wall
clock or calendar, and is not guaranteed to be the same epoch across
program runs. It is represented as the DiffTime
from this arbitrary epoch.
diffTime :: Time -> Time -> DiffTime Source #
The time duration between two points in time (positive or negative).
This is a length of time, as measured by a clock. Conversion functions will treat it as seconds. It has a precision of 10^-12 s.
Instances
Enum DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime | |
Eq DiffTime | |
Fractional DiffTime | |
Data DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> DiffTime -> c DiffTime # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c DiffTime # toConstr :: DiffTime -> Constr # dataTypeOf :: DiffTime -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c DiffTime) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c DiffTime) # gmapT :: (forall b. Data b => b -> b) -> DiffTime -> DiffTime # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> DiffTime -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> DiffTime -> r # gmapQ :: (forall d. Data d => d -> u) -> DiffTime -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> DiffTime -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> DiffTime -> m DiffTime # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> DiffTime -> m DiffTime # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> DiffTime -> m DiffTime # | |
Num DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime | |
Ord DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime | |
Real DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime Methods toRational :: DiffTime -> Rational # | |
RealFrac DiffTime | |
Show DiffTime | |
NFData DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime |
NominalTime
and its action on UTCTime
This is the simplest representation of UTC. It consists of the day number, and a time offset from midnight. Note that if a day has a leap second added to it, it will have 86401 seconds.
Instances
Eq UTCTime | |
Data UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> UTCTime -> c UTCTime # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c UTCTime # toConstr :: UTCTime -> Constr # dataTypeOf :: UTCTime -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c UTCTime) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c UTCTime) # gmapT :: (forall b. Data b => b -> b) -> UTCTime -> UTCTime # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> UTCTime -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> UTCTime -> r # gmapQ :: (forall d. Data d => d -> u) -> UTCTime -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> UTCTime -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # | |
Ord UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime | |
NFData UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime |
diffUTCTime :: UTCTime -> UTCTime -> NominalDiffTime #
diffUTCTime a b = a - b
addUTCTime :: NominalDiffTime -> UTCTime -> UTCTime #
addUTCTime a b = a + b
data NominalDiffTime #
This is a length of time, as measured by UTC. It has a precision of 10^-12 s.
Conversion functions will treat it as seconds.
For example, (0.010 :: NominalDiffTime)
corresponds to 10 milliseconds.
It ignores leap-seconds, so it's not necessarily a fixed amount of clock time. For instance, 23:00 UTC + 2 hours of NominalDiffTime = 01:00 UTC (+ 1 day), regardless of whether a leap-second intervened.