| Copyright | (c) The University of Glasgow 2001 |
|---|---|
| License | BSD-style (see the file libraries/base/LICENSE) |
| Maintainer | [email protected] |
| Stability | experimental |
| Portability | non-portable (uses Control.Monad.ST.Lazy) |
| Safe Haskell | Safe |
| Language | Haskell2010 |
Data.STRef.Lazy
Contents
Description
Mutable references in the lazy ST monad.
STRefs
a value of type STRef s a is a mutable variable in state thread s,
containing a value of type a
>>>:{runST (do ref <- newSTRef "hello" x <- readSTRef ref writeSTRef ref (x ++ "world") readSTRef ref ) :} "helloworld"
writeSTRef :: STRef s a -> a -> ST s () Source #
modifySTRef :: STRef s a -> (a -> a) -> ST s () Source #