base-3.0.1.0: Basic librariesSource codeContentsIndex
GHC.STRef
Portabilitynon-portable (GHC Extensions)
Stabilityinternal
Maintainercvs-ghc@haskell.org
Description
References in the ST monad.
Synopsis
data STRef s a = STRef MutVar# s a
newSTRef :: a -> ST s (STRef s a)
readSTRef :: STRef s a -> ST s a
writeSTRef :: STRef s a -> a -> ST s ()
Documentation
data STRef s a Source
a value of type STRef s a is a mutable variable in state thread s, containing a value of type a
Constructors
STRef MutVar# s a
show/hide Instances
newSTRef :: a -> ST s (STRef s a)Source
Build a new STRef in the current state thread
readSTRef :: STRef s a -> ST s aSource
Read the value of an STRef
writeSTRef :: STRef s a -> a -> ST s ()Source
Write a new value into an STRef
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