vector-0.12.0.1: Efficient Arrays

Copyright (c) Roman Leshchinskiy 2008-2010 BSD-style Roman Leshchinskiy experimental non-portable None Haskell2010

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

class Prim a #

Minimal complete definition

Instances

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

Yield a part of the mutable vector without copying it.

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

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

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

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

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

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

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

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

## 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 memory is not initialized.

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.

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 vector by the given number of elements. The number must be positive.

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 positive but this is not checked.

## 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.

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

Swap the elements at the given positions.

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.

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.

# 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 permtuation

## 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.

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

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.

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.

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.