| Copyright | (c) The University of Glasgow 2001 |
|---|---|
| License | BSD-style (see the file libraries/base/LICENSE) |
| Maintainer | libraries@haskell.org |
| Stability | experimental |
| Portability | non-portable (uses Data.Array.MArray) |
| Safe Haskell | None |
| Language | Haskell2010 |
Data.Array.ST
Description
Mutable boxed and unboxed arrays in the ST monad.
Synopsis
- data STArray s i e
- runSTArray :: (forall s. ST s (STArray s i e)) -> Array i e
- data STUArray s i e
- runSTUArray :: (forall s. ST s (STUArray s i e)) -> UArray i e
- module Data.Array.MArray
Boxed arrays
Mutable, boxed, non-strict arrays in the ST monad. The type
arguments are as follows:
Instances
| MArray (STArray s) e (ST s) Source # | |
Methods getBounds :: Ix i => STArray s i e -> ST s (i, i) Source # getNumElements :: Ix i => STArray s i e -> ST s Int newArray :: Ix i => (i, i) -> e -> ST s (STArray s i e) Source # newArray_ :: Ix i => (i, i) -> ST s (STArray s i e) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STArray s i e) unsafeRead :: Ix i => STArray s i e -> Int -> ST s e unsafeWrite :: Ix i => STArray s i e -> Int -> e -> ST s () | |
| MArray (STArray s) e (ST s) Source # | |
Methods getBounds :: Ix i => STArray s i e -> ST s (i, i) Source # getNumElements :: Ix i => STArray s i e -> ST s Int newArray :: Ix i => (i, i) -> e -> ST s (STArray s i e) Source # newArray_ :: Ix i => (i, i) -> ST s (STArray s i e) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STArray s i e) unsafeRead :: Ix i => STArray s i e -> Int -> ST s e unsafeWrite :: Ix i => STArray s i e -> Int -> e -> ST s () | |
| Eq (STArray s i e) | Since: 2.1 |
runSTArray :: (forall s. ST s (STArray s i e)) -> Array i e Source #
A safe way to create and work with a mutable array before returning an
immutable array for later perusal. This function avoids copying
the array before returning it - it uses unsafeFreeze internally, but
this wrapper is a safe interface to that function.
Unboxed arrays
A mutable array with unboxed elements, that can be manipulated in
the ST monad. The type arguments are as follows:
s: the state variable argument for theSTtypei: the index type of the array (should be an instance ofIx)e: the element type of the array. Only certain element types are supported.
An STUArray will generally be more efficient (in terms of both time
and space) than the equivalent boxed version (STArray) with the same
element type. However, STUArray is strict in its elements - so
don't use STUArray if you require the non-strictness that
STArray provides.
Instances
runSTUArray :: (forall s. ST s (STUArray s i e)) -> UArray i e Source #
A safe way to create and work with an unboxed mutable array before
returning an immutable array for later perusal. This function
avoids copying the array before returning it - it uses
unsafeFreeze internally, but this wrapper is a safe interface to
that function.
Overloaded mutable array interface
module Data.Array.MArray