Safe Haskell	None
Language	Haskell2010

Core.System.External

Contents

Time
- from Chrono.TimeStamp

Description

Re-exports of dependencies from various external libraries.

Synopsis

newtype TimeStamp = TimeStamp {
- unTimeStamp :: Int64
}
getCurrentTimeNanoseconds :: IO TimeStamp

Time

from Chrono.TimeStamp

Re-exported from Chrono.TimeStamp in chronologique:

newtype TimeStamp #

Number of nanoseconds since the Unix epoch.

The Show instance displays the TimeStamp as seconds with the nanosecond precision expressed as a decimal amount after the interger, ie:

>>> t <- getCurrentTimeNanoseconds
>>> show t
2014-07-31T23:09:35.274387031Z

However this doesn't change the fact the underlying representation counts nanoseconds since epoch:

>>> show $ unTimeStamp t
1406848175274387031

There is a Read instance that is reasonably accommodating.

>>> read "2014-07-31T13:05:04.942089001Z" :: TimeStamp
2014-07-31T13:05:04.942089001Z

>>> read "1406811904.942089001" :: TimeStamp
2014-07-31T13:05:04.942089001Z

>>> read "1406811904" :: TimeStamp
2014-07-31T13:05:04.000000000Z

In case you're wondering, the valid range of nanoseconds that fits into the underlying Int64 is:

>>> show $ minBound :: TimeStamp
1677-09-21T00:12:43.145224192Z

>>> show $ maxBound :: TimeStamp
2262-04-11T23:47:16.854775807Z

so in a quarter millenium's time, yes, you'll have the Y2262 Problem. Haskell code from today will, of course, still be running, so in the mid Twenty-Third century you will need to replace this implementation with something else.

Constructors

TimeStamp
Fields unTimeStamp :: Int64

Instances

Instances details

Bounded TimeStamp
Instance details Defined in Chrono.TimeStamp Methods minBound :: TimeStamp # maxBound :: TimeStamp #
Enum TimeStamp
Instance details Defined in Chrono.TimeStamp Methods succ :: TimeStamp -> TimeStamp # pred :: TimeStamp -> TimeStamp # toEnum :: Int -> TimeStamp # fromEnum :: TimeStamp -> Int # enumFrom :: TimeStamp -> [TimeStamp] # enumFromThen :: TimeStamp -> TimeStamp -> [TimeStamp] # enumFromTo :: TimeStamp -> TimeStamp -> [TimeStamp] # enumFromThenTo :: TimeStamp -> TimeStamp -> TimeStamp -> [TimeStamp] #
Eq TimeStamp
Instance details Defined in Chrono.TimeStamp Methods (==) :: TimeStamp -> TimeStamp -> Bool # (/=) :: TimeStamp -> TimeStamp -> Bool #
Integral TimeStamp
Instance details Defined in Chrono.TimeStamp Methods quot :: TimeStamp -> TimeStamp -> TimeStamp # rem :: TimeStamp -> TimeStamp -> TimeStamp # div :: TimeStamp -> TimeStamp -> TimeStamp # mod :: TimeStamp -> TimeStamp -> TimeStamp # quotRem :: TimeStamp -> TimeStamp -> (TimeStamp, TimeStamp) # divMod :: TimeStamp -> TimeStamp -> (TimeStamp, TimeStamp) # toInteger :: TimeStamp -> Integer #
Num TimeStamp
Instance details Defined in Chrono.TimeStamp Methods (+) :: TimeStamp -> TimeStamp -> TimeStamp # (-) :: TimeStamp -> TimeStamp -> TimeStamp # (*) :: TimeStamp -> TimeStamp -> TimeStamp # negate :: TimeStamp -> TimeStamp # abs :: TimeStamp -> TimeStamp # signum :: TimeStamp -> TimeStamp # fromInteger :: Integer -> TimeStamp #
Ord TimeStamp
Instance details Defined in Chrono.TimeStamp Methods compare :: TimeStamp -> TimeStamp -> Ordering # (<) :: TimeStamp -> TimeStamp -> Bool # (<=) :: TimeStamp -> TimeStamp -> Bool # (>) :: TimeStamp -> TimeStamp -> Bool # (>=) :: TimeStamp -> TimeStamp -> Bool # max :: TimeStamp -> TimeStamp -> TimeStamp # min :: TimeStamp -> TimeStamp -> TimeStamp #
Read TimeStamp
Instance details Defined in Chrono.TimeStamp Methods readsPrec :: Int -> ReadS TimeStamp # readList :: ReadS [TimeStamp] # readPrec :: ReadPrec TimeStamp # readListPrec :: ReadPrec [TimeStamp] #
Real TimeStamp
Instance details Defined in Chrono.TimeStamp Methods toRational :: TimeStamp -> Rational #
Show TimeStamp
Instance details Defined in Chrono.TimeStamp Methods showsPrec :: Int -> TimeStamp -> ShowS # show :: TimeStamp -> String # showList :: [TimeStamp] -> ShowS #
Generic TimeStamp
Instance details Defined in Chrono.TimeStamp Associated Types type Rep TimeStamp :: Type -> Type # Methods from :: TimeStamp -> Rep TimeStamp x # to :: Rep TimeStamp x -> TimeStamp #
ToJSON TimeStamp
Instance details Defined in Chrono.TimeStamp Methods toJSON :: TimeStamp -> Value # toEncoding :: TimeStamp -> Encoding # toJSONList :: [TimeStamp] -> Value # toEncodingList :: [TimeStamp] -> Encoding #
FromJSON TimeStamp
Instance details Defined in Chrono.TimeStamp Methods parseJSON :: Value -> Parser TimeStamp # parseJSONList :: Value -> Parser [TimeStamp] #
Timeable TimeStamp
Instance details Defined in Chrono.TimeStamp Methods timeGetElapsedP :: TimeStamp -> ElapsedP # timeGetElapsed :: TimeStamp -> Elapsed # timeGetNanoSeconds :: TimeStamp -> NanoSeconds #
Time TimeStamp
Instance details Defined in Chrono.TimeStamp Methods timeFromElapsedP :: ElapsedP -> TimeStamp # timeFromElapsed :: Elapsed -> TimeStamp #
Unbox TimeStamp
Instance details Defined in Chrono.TimeStamp
Vector Vector TimeStamp
Instance details Defined in Chrono.TimeStamp Methods basicUnsafeFreeze :: PrimMonad m => Mutable Vector (PrimState m) TimeStamp -> m (Vector TimeStamp) # basicUnsafeThaw :: PrimMonad m => Vector TimeStamp -> m (Mutable Vector (PrimState m) TimeStamp) # basicLength :: Vector TimeStamp -> Int # basicUnsafeSlice :: Int -> Int -> Vector TimeStamp -> Vector TimeStamp # basicUnsafeIndexM :: Monad m => Vector TimeStamp -> Int -> m TimeStamp # basicUnsafeCopy :: PrimMonad m => Mutable Vector (PrimState m) TimeStamp -> Vector TimeStamp -> m () # elemseq :: Vector TimeStamp -> TimeStamp -> b -> b #
MVector MVector TimeStamp
Instance details Defined in Chrono.TimeStamp Methods basicLength :: MVector s TimeStamp -> Int # basicUnsafeSlice :: Int -> Int -> MVector s TimeStamp -> MVector s TimeStamp # basicOverlaps :: MVector s TimeStamp -> MVector s TimeStamp -> Bool # basicUnsafeNew :: PrimMonad m => Int -> m (MVector (PrimState m) TimeStamp) # basicInitialize :: PrimMonad m => MVector (PrimState m) TimeStamp -> m () # basicUnsafeReplicate :: PrimMonad m => Int -> TimeStamp -> m (MVector (PrimState m) TimeStamp) # basicUnsafeRead :: PrimMonad m => MVector (PrimState m) TimeStamp -> Int -> m TimeStamp # basicUnsafeWrite :: PrimMonad m => MVector (PrimState m) TimeStamp -> Int -> TimeStamp -> m () # basicClear :: PrimMonad m => MVector (PrimState m) TimeStamp -> m () # basicSet :: PrimMonad m => MVector (PrimState m) TimeStamp -> TimeStamp -> m () # basicUnsafeCopy :: PrimMonad m => MVector (PrimState m) TimeStamp -> MVector (PrimState m) TimeStamp -> m () # basicUnsafeMove :: PrimMonad m => MVector (PrimState m) TimeStamp -> MVector (PrimState m) TimeStamp -> m () # basicUnsafeGrow :: PrimMonad m => MVector (PrimState m) TimeStamp -> Int -> m (MVector (PrimState m) TimeStamp) #
type Rep TimeStamp
Instance details Defined in Chrono.TimeStamp type Rep TimeStamp = D1 ('MetaData "TimeStamp" "Chrono.TimeStamp" "chronologique-0.3.1.3-G4gOCSSwmap1o5N5SxjQEH" 'True) (C1 ('MetaCons "TimeStamp" 'PrefixI 'True) (S1 ('MetaSel ('Just "unTimeStamp") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int64)))
newtype Vector TimeStamp
Instance details Defined in Chrono.TimeStamp newtype Vector TimeStamp = V_TimeStamp (Vector Int64)
newtype MVector s TimeStamp
Instance details Defined in Chrono.TimeStamp newtype MVector s TimeStamp = MV_TimeStamp (MVector s Int64)

getCurrentTimeNanoseconds :: IO TimeStamp #

Get the current system time, expressed as a TimeStamp (which is to say, number of nanoseconds since the Unix epoch).