W3cubDocs

/Haskell 9

Data.Time.Clock.System

Safe Haskell Safe
Language Haskell2010

Description

Fast access to the system clock.

systemEpochDay :: Day Source

The day of the epoch of SystemTime, 1970-01-01

data SystemTime Source

SystemTime is time returned by system clock functions. Its semantics depends on the clock function, but the epoch is typically the beginning of 1970. Note that systemNanoseconds of 1E9 to 2E9-1 can be used to represent leap seconds.

Constructors

MkSystemTime

Fields

Instances
Instances details
NFData SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

rnf :: SystemTime -> () Source

Data SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> SystemTime -> c SystemTime

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c SystemTime

toConstr :: SystemTime -> Constr

dataTypeOf :: SystemTime -> DataType

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c SystemTime)

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c SystemTime)

gmapT :: (forall b. Data b => b -> b) -> SystemTime -> SystemTime

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> SystemTime -> r

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> SystemTime -> r

gmapQ :: (forall d. Data d => d -> u) -> SystemTime -> [u]

gmapQi :: Int -> (forall d. Data d => d -> u) -> SystemTime -> u

gmapM :: Monad m => (forall d. Data d => d -> m d) -> SystemTime -> m SystemTime

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> SystemTime -> m SystemTime

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> SystemTime -> m SystemTime

Generic SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Associated Types

type Rep SystemTime
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

type Rep SystemTime = D1 ('MetaData "SystemTime" "Data.Time.Clock.Internal.SystemTime" "time-1.14-40b8" 'False) (C1 ('MetaCons "MkSystemTime" 'PrefixI 'True) (S1 ('MetaSel ('Just "systemSeconds") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Int64) :*: S1 ('MetaSel ('Just "systemNanoseconds") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word32)))

Methods

from :: SystemTime -> Rep SystemTime x

to :: Rep SystemTime x -> SystemTime

Show SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

showsPrec :: Int -> SystemTime -> ShowS

show :: SystemTime -> String

showList :: [SystemTime] -> ShowS

Eq SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

(==) :: SystemTime -> SystemTime -> Bool

(/=) :: SystemTime -> SystemTime -> Bool

Ord SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

compare :: SystemTime -> SystemTime -> Ordering

(<) :: SystemTime -> SystemTime -> Bool

(<=) :: SystemTime -> SystemTime -> Bool

(>) :: SystemTime -> SystemTime -> Bool

(>=) :: SystemTime -> SystemTime -> Bool

max :: SystemTime -> SystemTime -> SystemTime

min :: SystemTime -> SystemTime -> SystemTime

Lift SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

Methods

lift :: Quote m => SystemTime -> m Exp

liftTyped :: forall (m :: Type -> Type). Quote m => SystemTime -> Code m SystemTime

type Rep SystemTime Source
Instance details

Defined in Data.Time.Clock.Internal.SystemTime

type Rep SystemTime = D1 ('MetaData "SystemTime" "Data.Time.Clock.Internal.SystemTime" "time-1.14-40b8" 'False) (C1 ('MetaCons "MkSystemTime" 'PrefixI 'True) (S1 ('MetaSel ('Just "systemSeconds") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Int64) :*: S1 ('MetaSel ('Just "systemNanoseconds") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word32)))

truncateSystemTimeLeapSecond :: SystemTime -> SystemTime Source

Map leap-second values to the start of the following second. The resulting systemNanoseconds will always be in the range 0 to 1E9-1.

getSystemTime :: IO SystemTime Source

Get the system time, epoch start of 1970 UTC, leap-seconds ignored. getSystemTime is typically much faster than getCurrentTime.

systemToUTCTime :: SystemTime -> UTCTime Source

Convert SystemTime to UTCTime, matching zero SystemTime to midnight of systemEpochDay UTC.

utcToSystemTime :: UTCTime -> SystemTime Source

Convert UTCTime to SystemTime, matching zero SystemTime to midnight of systemEpochDay UTC.

systemToTAITime :: SystemTime -> AbsoluteTime Source

Convert SystemTime to AbsoluteTime, matching zero SystemTime to midnight of systemEpochDay TAI.

© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).
https://downloads.haskell.org/~ghc/9.12.1/docs/libraries/time-1.14-40b8/Data-Time-Clock-System.html