Moduleunliftio-0.2.25.1Haskell2010

UnliftIO.IORef

Unlifted Data.IORef.

Synopsis

newtype IORef
value newIORef
value readIORef
value writeIORef
value modifyIORef
value modifyIORef'
value atomicModifyIORef
value atomicModifyIORef'
value atomicWriteIORef
value mkWeakIORef

Packageunliftio-0.2.25.1
Exports10
LanguageHaskell2010
LicenceMIT
SourceIORef.hs

newtypenewtype IORef a

Source#

A mutable variable in the IO monad.

Example11 expressions

>>> import GHC.Internal.Data.IORef>>> r <- newIORef 0>>> readIORef r0>>> writeIORef r 1>>> readIORef r1>>> atomicWriteIORef r 2>>> readIORef r2>>> modifyIORef' r (+ 1)>>> readIORef r3>>> atomicModifyIORef' r (\a -> (a + 1, ()))>>> readIORef r4

See also STRef and MVar.

Instances3NFData1, Eq, NFData

NFData1 IORefDefined in deepseq-1.5.2.0 · Control.DeepSeq
Eq (IORef a)Defined in ghc-internal-10.0.0 · GHC.Internal.IORef
Pointer equality.
NFData (IORef a)Defined in deepseq-1.5.2.0 · Control.DeepSeq
NOTE: Only strict in the reference and not the referenced value.