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	Trustworthy
Language	Haskell2010

Data.Array.ST

Contents

Boxed arrays
Unboxed arrays
Overloaded mutable array interface

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

data STArray s i e #

Mutable, boxed, non-strict arrays in the ST monad. The type arguments are as follows:

s: the state variable argument for the ST type
i: the index type of the array (should be an instance of Ix)
e: the element type of the array.

Instances

Instances details

MArray (STArray s) e (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STArray s i e -> ST s (i, i) Source # getNumElements :: Ix i => STArray s i e -> ST s Int Source # 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) Source # unsafeRead :: Ix i => STArray s i e -> Int -> ST s e Source # unsafeWrite :: Ix i => STArray s i e -> Int -> e -> ST s () Source #
MArray (STArray s) e (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STArray s i e -> ST s (i, i) Source # getNumElements :: Ix i => STArray s i e -> ST s Int Source # 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) Source # unsafeRead :: Ix i => STArray s i e -> Int -> ST s e Source # unsafeWrite :: Ix i => STArray s i e -> Int -> e -> ST s () Source #
Eq (STArray s i e)	Since: base-2.1
Instance details Defined in GHC.Arr Methods (==) :: STArray s i e -> STArray s i e -> Bool # (/=) :: STArray s i e -> STArray s i e -> Bool #

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

data STUArray s i e Source #

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 the ST type
i: the index type of the array (should be an instance of Ix)
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

Instances details

MArray (STUArray s) Int16 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Int16 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Int16 -> ST s Int Source # newArray :: Ix i => (i, i) -> Int16 -> ST s (STUArray s i Int16) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int16) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int16) Source # unsafeRead :: Ix i => STUArray s i Int16 -> Int -> ST s Int16 Source # unsafeWrite :: Ix i => STUArray s i Int16 -> Int -> Int16 -> ST s () Source #
MArray (STUArray s) Int32 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Int32 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Int32 -> ST s Int Source # newArray :: Ix i => (i, i) -> Int32 -> ST s (STUArray s i Int32) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int32) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int32) Source # unsafeRead :: Ix i => STUArray s i Int32 -> Int -> ST s Int32 Source # unsafeWrite :: Ix i => STUArray s i Int32 -> Int -> Int32 -> ST s () Source #
MArray (STUArray s) Int64 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Int64 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Int64 -> ST s Int Source # newArray :: Ix i => (i, i) -> Int64 -> ST s (STUArray s i Int64) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int64) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int64) Source # unsafeRead :: Ix i => STUArray s i Int64 -> Int -> ST s Int64 Source # unsafeWrite :: Ix i => STUArray s i Int64 -> Int -> Int64 -> ST s () Source #
MArray (STUArray s) Int8 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Int8 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Int8 -> ST s Int Source # newArray :: Ix i => (i, i) -> Int8 -> ST s (STUArray s i Int8) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int8) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int8) Source # unsafeRead :: Ix i => STUArray s i Int8 -> Int -> ST s Int8 Source # unsafeWrite :: Ix i => STUArray s i Int8 -> Int -> Int8 -> ST s () Source #
MArray (STUArray s) Word16 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Word16 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Word16 -> ST s Int Source # newArray :: Ix i => (i, i) -> Word16 -> ST s (STUArray s i Word16) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word16) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word16) Source # unsafeRead :: Ix i => STUArray s i Word16 -> Int -> ST s Word16 Source # unsafeWrite :: Ix i => STUArray s i Word16 -> Int -> Word16 -> ST s () Source #
MArray (STUArray s) Word32 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Word32 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Word32 -> ST s Int Source # newArray :: Ix i => (i, i) -> Word32 -> ST s (STUArray s i Word32) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word32) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word32) Source # unsafeRead :: Ix i => STUArray s i Word32 -> Int -> ST s Word32 Source # unsafeWrite :: Ix i => STUArray s i Word32 -> Int -> Word32 -> ST s () Source #
MArray (STUArray s) Word64 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Word64 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Word64 -> ST s Int Source # newArray :: Ix i => (i, i) -> Word64 -> ST s (STUArray s i Word64) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word64) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word64) Source # unsafeRead :: Ix i => STUArray s i Word64 -> Int -> ST s Word64 Source # unsafeWrite :: Ix i => STUArray s i Word64 -> Int -> Word64 -> ST s () Source #
MArray (STUArray s) Word8 (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Word8 -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Word8 -> ST s Int Source # newArray :: Ix i => (i, i) -> Word8 -> ST s (STUArray s i Word8) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word8) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word8) Source # unsafeRead :: Ix i => STUArray s i Word8 -> Int -> ST s Word8 Source # unsafeWrite :: Ix i => STUArray s i Word8 -> Int -> Word8 -> ST s () Source #
MArray (STUArray s) Bool (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Bool -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Bool -> ST s Int Source # newArray :: Ix i => (i, i) -> Bool -> ST s (STUArray s i Bool) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Bool) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Bool) Source # unsafeRead :: Ix i => STUArray s i Bool -> Int -> ST s Bool Source # unsafeWrite :: Ix i => STUArray s i Bool -> Int -> Bool -> ST s () Source #
MArray (STUArray s) Char (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Char -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Char -> ST s Int Source # newArray :: Ix i => (i, i) -> Char -> ST s (STUArray s i Char) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Char) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Char) Source # unsafeRead :: Ix i => STUArray s i Char -> Int -> ST s Char Source # unsafeWrite :: Ix i => STUArray s i Char -> Int -> Char -> ST s () Source #
MArray (STUArray s) Double (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Double -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Double -> ST s Int Source # newArray :: Ix i => (i, i) -> Double -> ST s (STUArray s i Double) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Double) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Double) Source # unsafeRead :: Ix i => STUArray s i Double -> Int -> ST s Double Source # unsafeWrite :: Ix i => STUArray s i Double -> Int -> Double -> ST s () Source #
MArray (STUArray s) Float (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Float -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Float -> ST s Int Source # newArray :: Ix i => (i, i) -> Float -> ST s (STUArray s i Float) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Float) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Float) Source # unsafeRead :: Ix i => STUArray s i Float -> Int -> ST s Float Source # unsafeWrite :: Ix i => STUArray s i Float -> Int -> Float -> ST s () Source #
MArray (STUArray s) Int (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Int -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Int -> ST s Int Source # newArray :: Ix i => (i, i) -> Int -> ST s (STUArray s i Int) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Int) Source # unsafeRead :: Ix i => STUArray s i Int -> Int -> ST s Int Source # unsafeWrite :: Ix i => STUArray s i Int -> Int -> Int -> ST s () Source #
MArray (STUArray s) Word (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i Word -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i Word -> ST s Int Source # newArray :: Ix i => (i, i) -> Word -> ST s (STUArray s i Word) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i Word) Source # unsafeRead :: Ix i => STUArray s i Word -> Int -> ST s Word Source # unsafeWrite :: Ix i => STUArray s i Word -> Int -> Word -> ST s () Source #
MArray (STUArray s) (FunPtr a) (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i (FunPtr a) -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i (FunPtr a) -> ST s Int Source # newArray :: Ix i => (i, i) -> FunPtr a -> ST s (STUArray s i (FunPtr a)) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i (FunPtr a)) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i (FunPtr a)) Source # unsafeRead :: Ix i => STUArray s i (FunPtr a) -> Int -> ST s (FunPtr a) Source # unsafeWrite :: Ix i => STUArray s i (FunPtr a) -> Int -> FunPtr a -> ST s () Source #
MArray (STUArray s) (Ptr a) (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i (Ptr a) -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i (Ptr a) -> ST s Int Source # newArray :: Ix i => (i, i) -> Ptr a -> ST s (STUArray s i (Ptr a)) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i (Ptr a)) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i (Ptr a)) Source # unsafeRead :: Ix i => STUArray s i (Ptr a) -> Int -> ST s (Ptr a) Source # unsafeWrite :: Ix i => STUArray s i (Ptr a) -> Int -> Ptr a -> ST s () Source #
MArray (STUArray s) (StablePtr a) (ST s) Source #
Instance details Defined in Data.Array.Base Methods getBounds :: Ix i => STUArray s i (StablePtr a) -> ST s (i, i) Source # getNumElements :: Ix i => STUArray s i (StablePtr a) -> ST s Int Source # newArray :: Ix i => (i, i) -> StablePtr a -> ST s (STUArray s i (StablePtr a)) Source # newArray_ :: Ix i => (i, i) -> ST s (STUArray s i (StablePtr a)) Source # unsafeNewArray_ :: Ix i => (i, i) -> ST s (STUArray s i (StablePtr a)) Source # unsafeRead :: Ix i => STUArray s i (StablePtr a) -> Int -> ST s (StablePtr a) Source # unsafeWrite :: Ix i => STUArray s i (StablePtr a) -> Int -> StablePtr a -> ST s () Source #
Eq (STUArray s i e) Source #
Instance details Defined in Data.Array.Base Methods (==) :: STUArray s i e -> STUArray s i e -> Bool # (/=) :: STUArray s i e -> STUArray s i e -> Bool #

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