vector-0.12.3.1: Efficient Arrays
Copyright(c) Roman Leshchinskiy 2008-2010
LicenseBSD-style
MaintainerRoman Leshchinskiy <rl@cse.unsw.edu.au>
Stabilityexperimental
Portabilitynon-portable
Safe HaskellNone
LanguageHaskell2010

Data.Vector.Primitive.Mutable

Description

Mutable primitive vectors.

Synopsis

Mutable vectors of primitive types

data MVector s a Source #

Mutable vectors of primitive types.

Constructors

MVector !Int !Int !(MutableByteArray s)

offset, length, underlying mutable byte array

Instances

Instances details
Prim a => MVector MVector a Source # 
Instance details

Defined in Data.Vector.Primitive.Mutable

NFData1 (MVector s) Source # 
Instance details

Defined in Data.Vector.Primitive.Mutable

Methods

liftRnf :: (a -> ()) -> MVector s a -> () Source #

NFData (MVector s a) Source # 
Instance details

Defined in Data.Vector.Primitive.Mutable

Methods

rnf :: MVector s a -> () Source #

class Prim a Source #

Class of types supporting primitive array operations. This includes interfacing with GC-managed memory (functions suffixed with ByteArray#) and interfacing with unmanaged memory (functions suffixed with Addr#). Endianness is platform-dependent.

Instances

Instances details
Prim Char 
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Defined in Data.Primitive.Types

Prim Double 
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Defined in Data.Primitive.Types

Prim Float 
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Defined in Data.Primitive.Types

Prim Int 
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Defined in Data.Primitive.Types

Prim Int8 
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Defined in Data.Primitive.Types

Prim Int16 
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Prim Int32 
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Prim Int64 
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Defined in Data.Primitive.Types

Prim Word 
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Defined in Data.Primitive.Types

Prim Word8 
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Prim Word16 
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Defined in Data.Primitive.Types

Prim Word32 
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Prim Word64 
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Defined in Data.Primitive.Types

Prim CDev 
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Defined in Data.Primitive.Types

Prim CIno 
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Defined in Data.Primitive.Types

Prim CMode 
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Defined in Data.Primitive.Types

Prim COff 
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Defined in Data.Primitive.Types

Prim CPid 
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Defined in Data.Primitive.Types

Prim CSsize 
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Prim CGid 
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Prim CNlink 
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Prim CUid 
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Defined in Data.Primitive.Types

Prim CCc 
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Defined in Data.Primitive.Types

Prim CSpeed 
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Defined in Data.Primitive.Types

Prim CTcflag 
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Defined in Data.Primitive.Types

Prim CRLim 
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Defined in Data.Primitive.Types

Prim CBlkSize 
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Defined in Data.Primitive.Types

Prim CBlkCnt 
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Defined in Data.Primitive.Types

Prim CClockId 
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Defined in Data.Primitive.Types

Prim CFsBlkCnt 
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Defined in Data.Primitive.Types

Prim CFsFilCnt 
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Prim CId 
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Defined in Data.Primitive.Types

Prim CKey 
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Prim CTimer 
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Defined in Data.Primitive.Types

Prim Fd 
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Prim CChar 
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Prim CSChar 
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Prim CUChar 
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Prim CShort 
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Prim CUShort 
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Prim CInt 
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Prim CUInt 
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Defined in Data.Primitive.Types

Prim CLong 
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Prim CULong 
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Defined in Data.Primitive.Types

Prim CLLong 
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Prim CULLong 
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Defined in Data.Primitive.Types

Prim CBool 
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Defined in Data.Primitive.Types

Prim CFloat 
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Defined in Data.Primitive.Types

Prim CDouble 
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Defined in Data.Primitive.Types

Prim CPtrdiff 
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Prim CSize 
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Prim CWchar 
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Prim CSigAtomic 
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Prim CClock 
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Defined in Data.Primitive.Types

Prim CTime 
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Defined in Data.Primitive.Types

Prim CUSeconds 
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Prim CSUSeconds 
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Defined in Data.Primitive.Types

Prim CIntPtr 
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Defined in Data.Primitive.Types

Prim CUIntPtr 
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Defined in Data.Primitive.Types

Prim CIntMax 
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Defined in Data.Primitive.Types

Prim CUIntMax 
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Defined in Data.Primitive.Types

Prim WordPtr

Since: primitive-0.7.1.0

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Defined in Data.Primitive.Types

Prim IntPtr

Since: primitive-0.7.1.0

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Defined in Data.Primitive.Types

Prim (StablePtr a) 
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Defined in Data.Primitive.Types

Prim (Ptr a) 
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Defined in Data.Primitive.Types

Prim (FunPtr a) 
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Defined in Data.Primitive.Types

Prim a => Prim (Min a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Max a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (First a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Last a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Identity a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Dual a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Sum a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Product a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Down a)

Since: primitive-0.6.5.0

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Defined in Data.Primitive.Types

Prim a => Prim (Const a b)

Since: primitive-0.6.5.0

Instance details

Defined in Data.Primitive.Types

Accessors

Length information

length :: Prim a => MVector s a -> Int Source #

Length of the mutable vector.

null :: Prim a => MVector s a -> Bool Source #

Check whether the vector is empty

Extracting subvectors

slice Source #

Arguments

:: Prim a 
=> Int

i starting index

-> Int

n length

-> MVector s a 
-> MVector s a 

Yield a part of the mutable vector without copying it. The vector must contain at least i+n elements.

init :: Prim a => MVector s a -> MVector s a Source #

Drop last element of the mutable vector without making a copy. If vector is empty exception is thrown.

tail :: Prim a => MVector s a -> MVector s a Source #

Drop first element of the mutable vector without making a copy. If vector is empty exception is thrown.

take :: Prim a => Int -> MVector s a -> MVector s a Source #

Take n first elements of the mutable vector without making a copy. For negative n empty vector is returned. If n is larger than vector's length empty vector is returned,

drop :: Prim a => Int -> MVector s a -> MVector s a Source #

Drop n first element of the mutable vector without making a copy. For negative n vector is returned unchanged and if n is larger than vector's length empty vector is returned.

splitAt :: Prim a => Int -> MVector s a -> (MVector s a, MVector s a) Source #

unsafeSlice Source #

Arguments

:: Prim a 
=> Int

starting index

-> Int

length of the slice

-> MVector s a 
-> MVector s a 

Yield a part of the mutable vector without copying it. No bounds checks are performed.

unsafeInit :: Prim a => MVector s a -> MVector s a Source #

Same as init but doesn't do range checks.

unsafeTail :: Prim a => MVector s a -> MVector s a Source #

Same as tail but doesn't do range checks.

unsafeTake :: Prim a => Int -> MVector s a -> MVector s a Source #

Unsafe variant of take. If called with out of range n it will simply create invalid slice that likely violate memory safety

unsafeDrop :: Prim a => Int -> MVector s a -> MVector s a Source #

Unsafe variant of drop. If called with out of range n it will simply create invalid slice that likely violate memory safety

Overlapping

overlaps :: Prim a => MVector s a -> MVector s a -> Bool Source #

Check whether two vectors overlap.

Construction

Initialisation

new :: (PrimMonad m, Prim a) => Int -> m (MVector (PrimState m) a) Source #

Create a mutable vector of the given length.

unsafeNew :: (PrimMonad m, Prim a) => Int -> m (MVector (PrimState m) a) Source #

Create a mutable vector of the given length. The vector content is uninitialized, which means it is filled with whatever underlying memory buffer happens to contain.

Since: 0.5

replicate :: (PrimMonad m, Prim a) => Int -> a -> m (MVector (PrimState m) a) Source #

Create a mutable vector of the given length (0 if the length is negative) and fill it with an initial value.

replicateM :: (PrimMonad m, Prim a) => Int -> m a -> m (MVector (PrimState m) a) Source #

Create a mutable vector of the given length (0 if the length is negative) and fill it with values produced by repeatedly executing the monadic action.

generate :: (PrimMonad m, Prim a) => Int -> (Int -> a) -> m (MVector (PrimState m) a) Source #

O(n) Create a mutable vector of the given length (0 if the length is negative) and fill it with the results of applying the function to each index.

Since: 0.12.3.0

generateM :: (PrimMonad m, Prim a) => Int -> (Int -> m a) -> m (MVector (PrimState m) a) Source #

O(n) Create a mutable vector of the given length (0 if the length is negative) and fill it with the results of applying the monadic function to each index. Iteration starts at index 0.

Since: 0.12.3.0

clone :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> m (MVector (PrimState m) a) Source #

Create a copy of a mutable vector.

Growing

grow :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> m (MVector (PrimState m) a) Source #

Grow a primitive vector by the given number of elements. The number must be non-negative. Same semantics as in grow for generic vector.

Examples

Expand
>>> import qualified Data.Vector.Primitive as VP
>>> import qualified Data.Vector.Primitive.Mutable as MVP
>>> mv <- VP.thaw $ VP.fromList ([10, 20, 30] :: [Int])
>>> mv' <- MVP.grow mv 2

Extra memory at the end of the newly allocated vector is initialized to 0 bytes, which for Prim instance will usually correspond to some default value for a particular type, eg. 0 for Int, NUL for Char, etc. However, if unsafeGrow was used instead this would not have been guaranteed and some garbage would be there instead:

>>> VP.freeze mv'
[10,20,30,0,0]

Having the extra space we can write new values in there:

>>> MVP.write mv' 3 999
>>> VP.freeze mv'
[10,20,30,999,0]

It is important to note that the source mutable vector is not affected when the newly allocated one is mutated.

>>> MVP.write mv' 2 888
>>> VP.freeze mv'
[10,20,888,999,0]
>>> VP.freeze mv
[10,20,30]

Since: 0.5

unsafeGrow :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> m (MVector (PrimState m) a) Source #

Grow a vector by the given number of elements. The number must be non-negative but this is not checked. Same semantics as in unsafeGrow for generic vector.

Since: 0.5

Restricting memory usage

clear :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> m () Source #

Reset all elements of the vector to some undefined value, clearing all references to external objects. This is usually a noop for unboxed vectors.

Accessing individual elements

read :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> m a Source #

Yield the element at the given position.

write :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> a -> m () Source #

Replace the element at the given position.

modify :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> (a -> a) -> Int -> m () Source #

Modify the element at the given position.

modifyM :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> (a -> m a) -> Int -> m () Source #

Modify the element at the given position using a monadic function.

Since: 0.12.3.0

swap :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> Int -> m () Source #

Swap the elements at the given positions.

exchange :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> a -> m a Source #

Replace the element at the given position and return the old element.

unsafeRead :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> m a Source #

Yield the element at the given position. No bounds checks are performed.

unsafeWrite :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> a -> m () Source #

Replace the element at the given position. No bounds checks are performed.

unsafeModify :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> (a -> a) -> Int -> m () Source #

Modify the element at the given position. No bounds checks are performed.

unsafeModifyM :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> (a -> m a) -> Int -> m () Source #

Modify the element at the given position using a monadic function. No bounds checks are performed.

Since: 0.12.3.0

unsafeSwap :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> Int -> m () Source #

Swap the elements at the given positions. No bounds checks are performed.

unsafeExchange :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> Int -> a -> m a Source #

Replace the element at the given position and return the old element. No bounds checks are performed.

Folds

mapM_ :: (PrimMonad m, Prim a) => (a -> m b) -> MVector (PrimState m) a -> m () Source #

O(n) Apply the monadic action to every element of the vector, discarding the results.

Since: 0.12.3.0

imapM_ :: (PrimMonad m, Prim a) => (Int -> a -> m b) -> MVector (PrimState m) a -> m () Source #

O(n) Apply the monadic action to every element of the vector and its index, discarding the results.

Since: 0.12.3.0

forM_ :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> (a -> m b) -> m () Source #

O(n) Apply the monadic action to every element of the vector, discarding the results. It's same as the flip mapM_.

Since: 0.12.3.0

iforM_ :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> (Int -> a -> m b) -> m () Source #

O(n) Apply the monadic action to every element of the vector and its index, discarding the results. It's same as the flip imapM_.

Since: 0.12.3.0

foldl :: (PrimMonad m, Prim a) => (b -> a -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure left fold.

Since: 0.12.3.0

foldl' :: (PrimMonad m, Prim a) => (b -> a -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure left fold with strict accumulator.

Since: 0.12.3.0

foldM :: (PrimMonad m, Prim a) => (b -> a -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic fold.

Since: 0.12.3.0

foldM' :: (PrimMonad m, Prim a) => (b -> a -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic fold with strict accumulator.

Since: 0.12.3.0

foldr :: (PrimMonad m, Prim a) => (a -> b -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure right fold.

Since: 0.12.3.0

foldr' :: (PrimMonad m, Prim a) => (a -> b -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure right fold with strict accumulator.

Since: 0.12.3.0

foldrM :: (PrimMonad m, Prim a) => (a -> b -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic right fold.

Since: 0.12.3.0

foldrM' :: (PrimMonad m, Prim a) => (a -> b -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic right fold with strict accumulator.

Since: 0.12.3.0

ifoldl :: (PrimMonad m, Prim a) => (b -> Int -> a -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure left fold (function applied to each element and its index).

Since: 0.12.3.0

ifoldl' :: (PrimMonad m, Prim a) => (b -> Int -> a -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure left fold with strict accumulator (function applied to each element and its index).

Since: 0.12.3.0

ifoldM :: (PrimMonad m, Prim a) => (b -> Int -> a -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic fold (action applied to each element and its index).

Since: 0.12.3.0

ifoldM' :: (PrimMonad m, Prim a) => (b -> Int -> a -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic fold with strict accumulator (action applied to each element and its index).

Since: 0.12.3.0

ifoldr :: (PrimMonad m, Prim a) => (Int -> a -> b -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure right fold (function applied to each element and its index).

Since: 0.12.3.0

ifoldr' :: (PrimMonad m, Prim a) => (Int -> a -> b -> b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Pure right fold with strict accumulator (function applied to each element and its index).

Since: 0.12.3.0

ifoldrM :: (PrimMonad m, Prim a) => (Int -> a -> b -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic right fold (action applied to each element and its index).

Since: 0.12.3.0

ifoldrM' :: (PrimMonad m, Prim a) => (Int -> a -> b -> m b) -> b -> MVector (PrimState m) a -> m b Source #

O(n) Monadic right fold with strict accumulator (action applied to each element and its index).

Since: 0.12.3.0

Modifying vectors

nextPermutation :: (PrimMonad m, Ord e, Prim e) => MVector (PrimState m) e -> m Bool Source #

Compute the next (lexicographically) permutation of given vector in-place. Returns False when input is the last permutation

Filling and copying

set :: (PrimMonad m, Prim a) => MVector (PrimState m) a -> a -> m () Source #

Set all elements of the vector to the given value.

copy Source #

Arguments

:: (PrimMonad m, Prim a) 
=> MVector (PrimState m) a

target

-> MVector (PrimState m) a

source

-> m () 

Copy a vector. The two vectors must have the same length and may not overlap.

move Source #

Arguments

:: (PrimMonad m, Prim a) 
=> MVector (PrimState m) a

target

-> MVector (PrimState m) a

source

-> m () 

Move the contents of a vector. The two vectors must have the same length.

If the vectors do not overlap, then this is equivalent to copy. Otherwise, the copying is performed as if the source vector were copied to a temporary vector and then the temporary vector was copied to the target vector.

unsafeCopy Source #

Arguments

:: (PrimMonad m, Prim a) 
=> MVector (PrimState m) a

target

-> MVector (PrimState m) a

source

-> m () 

Copy a vector. The two vectors must have the same length and may not overlap. This is not checked.

unsafeMove Source #

Arguments

:: (PrimMonad m, Prim a) 
=> MVector (PrimState m) a

target

-> MVector (PrimState m) a

source

-> m () 

Move the contents of a vector. The two vectors must have the same length, but this is not checked.

If the vectors do not overlap, then this is equivalent to unsafeCopy. Otherwise, the copying is performed as if the source vector were copied to a temporary vector and then the temporary vector was copied to the target vector.