Safe Haskell | None |
---|---|

Language | Haskell2010 |

This module re-exports the functionality in `Sized`

specialized to `Vector`

.

Functions returning a vector determine the size from the type context unless
they have a `'`

suffix in which case they take an explicit `Proxy`

argument.

Functions where the resulting vector size is not known until runtime are not exported.

## Synopsis

- type Vector = Vector Vector
- pattern SomeSized :: () => KnownNat n => Vector n a -> Vector a
- type MVector = MVector MVector
- length :: forall n a. KnownNat n => Vector n a -> Int
- length' :: forall n a. Vector n a -> Proxy n
- knownLength :: forall n a r. Vector n a -> (KnownNat n => r) -> r
- knownLength' :: forall n a r. Vector n a -> (KnownNat n => Proxy n -> r) -> r
- index :: forall n a. Vector n a -> Finite n -> a
- index' :: forall n m a p. KnownNat n => Vector ((n + m) + 1) a -> p n -> a
- unsafeIndex :: forall n a. Vector n a -> Int -> a
- head :: forall n a. Vector (1 + n) a -> a
- last :: forall n a. Vector (n + 1) a -> a
- indexM :: forall n a m. Monad m => Vector n a -> Finite n -> m a
- indexM' :: forall n k a m p. (KnownNat n, Monad m) => Vector (n + k) a -> p n -> m a
- unsafeIndexM :: forall n a m. Monad m => Vector n a -> Int -> m a
- headM :: forall n a m. Monad m => Vector (1 + n) a -> m a
- lastM :: forall n a m. Monad m => Vector (n + 1) a -> m a
- slice :: forall i n m a p. (KnownNat i, KnownNat n) => p i -> Vector ((i + n) + m) a -> Vector n a
- slice' :: forall i n m a p. (KnownNat i, KnownNat n) => p i -> p n -> Vector ((i + n) + m) a -> Vector n a
- init :: forall n a. Vector (n + 1) a -> Vector n a
- tail :: forall n a. Vector (1 + n) a -> Vector n a
- take :: forall n m a. KnownNat n => Vector (n + m) a -> Vector n a
- take' :: forall n m a p. KnownNat n => p n -> Vector (n + m) a -> Vector n a
- drop :: forall n m a. KnownNat n => Vector (n + m) a -> Vector m a
- drop' :: forall n m a p. KnownNat n => p n -> Vector (n + m) a -> Vector m a
- splitAt :: forall n m a. KnownNat n => Vector (n + m) a -> (Vector n a, Vector m a)
- splitAt' :: forall n m a p. KnownNat n => p n -> Vector (n + m) a -> (Vector n a, Vector m a)
- empty :: forall a. Vector 0 a
- singleton :: forall a. a -> Vector 1 a
- fromTuple :: forall input length ty. (IndexedListLiterals input length ty, KnownNat length) => input -> Vector length ty
- replicate :: forall n a. KnownNat n => a -> Vector n a
- replicate' :: forall n a p. KnownNat n => p n -> a -> Vector n a
- generate :: forall n a. KnownNat n => (Finite n -> a) -> Vector n a
- generate' :: forall n a p. KnownNat n => p n -> (Finite n -> a) -> Vector n a
- iterateN :: forall n a. KnownNat n => (a -> a) -> a -> Vector n a
- iterateN' :: forall n a p. KnownNat n => p n -> (a -> a) -> a -> Vector n a
- replicateM :: forall n m a. (KnownNat n, Monad m) => m a -> m (Vector n a)
- replicateM' :: forall n m a p. (KnownNat n, Monad m) => p n -> m a -> m (Vector n a)
- generateM :: forall n m a. (KnownNat n, Monad m) => (Finite n -> m a) -> m (Vector n a)
- generateM' :: forall n m a p. (KnownNat n, Monad m) => p n -> (Finite n -> m a) -> m (Vector n a)
- unfoldrN :: forall n a b. KnownNat n => (b -> (a, b)) -> b -> Vector n a
- unfoldrN' :: forall n a b p. KnownNat n => p n -> (b -> (a, b)) -> b -> Vector n a
- enumFromN :: forall n a. (KnownNat n, Num a) => a -> Vector n a
- enumFromN' :: forall n a p. (KnownNat n, Num a) => a -> p n -> Vector n a
- enumFromStepN :: forall n a. (KnownNat n, Num a) => a -> a -> Vector n a
- enumFromStepN' :: forall n a p. (KnownNat n, Num a) => a -> a -> p n -> Vector n a
- cons :: forall n a. a -> Vector n a -> Vector (1 + n) a
- snoc :: forall n a. Vector n a -> a -> Vector (n + 1) a
- (++) :: forall n m a. Vector n a -> Vector m a -> Vector (n + m) a
- force :: Vector n a -> Vector n a
- (//) :: Vector m a -> [(Finite m, a)] -> Vector m a
- update :: Vector m a -> Vector n (Int, a) -> Vector m a
- update_ :: Vector m a -> Vector n Int -> Vector n a -> Vector m a
- unsafeUpd :: Vector m a -> [(Int, a)] -> Vector m a
- unsafeUpdate :: Vector m a -> Vector n (Int, a) -> Vector m a
- unsafeUpdate_ :: Vector m a -> Vector n Int -> Vector n a -> Vector m a
- accum :: (a -> b -> a) -> Vector m a -> [(Int, b)] -> Vector m a
- accumulate :: (a -> b -> a) -> Vector m a -> Vector n (Int, b) -> Vector m a
- accumulate_ :: (a -> b -> a) -> Vector m a -> Vector n Int -> Vector n b -> Vector m a
- unsafeAccum :: (a -> b -> a) -> Vector m a -> [(Int, b)] -> Vector m a
- unsafeAccumulate :: (a -> b -> a) -> Vector m a -> Vector n (Int, b) -> Vector m a
- unsafeAccumulate_ :: (a -> b -> a) -> Vector m a -> Vector n Int -> Vector n b -> Vector m a
- reverse :: Vector n a -> Vector n a
- backpermute :: Vector m a -> Vector n Int -> Vector n a
- unsafeBackpermute :: Vector m a -> Vector n Int -> Vector n a
- ix :: forall n a f. Functor f => Finite n -> (a -> f a) -> Vector n a -> f (Vector n a)
- _head :: forall n a f. Functor f => (a -> f a) -> Vector (1 + n) a -> f (Vector (1 + n) a)
- _last :: forall n a f. Functor f => (a -> f a) -> Vector (n + 1) a -> f (Vector (n + 1) a)
- indexed :: Vector n a -> Vector n (Finite n, a)
- map :: (a -> b) -> Vector n a -> Vector n b
- imap :: (Finite n -> a -> b) -> Vector n a -> Vector n b
- concatMap :: (a -> Vector m b) -> Vector n a -> Vector (n * m) b
- mapM :: Monad m => (a -> m b) -> Vector n a -> m (Vector n b)
- imapM :: Monad m => (Finite n -> a -> m b) -> Vector n a -> m (Vector n b)
- mapM_ :: Monad m => (a -> m b) -> Vector n a -> m ()
- imapM_ :: Monad m => (Finite n -> a -> m b) -> Vector n a -> m ()
- forM :: Monad m => Vector n a -> (a -> m b) -> m (Vector n b)
- forM_ :: Monad m => Vector n a -> (a -> m b) -> m ()
- zipWith :: (a -> b -> c) -> Vector n a -> Vector n b -> Vector n c
- zipWith3 :: (a -> b -> c -> d) -> Vector n a -> Vector n b -> Vector n c -> Vector n d
- zipWith4 :: (a -> b -> c -> d -> e) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e
- zipWith5 :: (a -> b -> c -> d -> e -> f) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f
- zipWith6 :: (a -> b -> c -> d -> e -> f -> g) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f -> Vector n g
- izipWith :: (Finite n -> a -> b -> c) -> Vector n a -> Vector n b -> Vector n c
- izipWith3 :: (Finite n -> a -> b -> c -> d) -> Vector n a -> Vector n b -> Vector n c -> Vector n d
- izipWith4 :: (Finite n -> a -> b -> c -> d -> e) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e
- izipWith5 :: (Finite n -> a -> b -> c -> d -> e -> f) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f
- izipWith6 :: (Finite n -> a -> b -> c -> d -> e -> f -> g) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f -> Vector n g
- zip :: Vector n a -> Vector n b -> Vector n (a, b)
- zip3 :: Vector n a -> Vector n b -> Vector n c -> Vector n (a, b, c)
- zip4 :: Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n (a, b, c, d)
- zip5 :: Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n (a, b, c, d, e)
- zip6 :: Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f -> Vector n (a, b, c, d, e, f)
- zipWithM :: Monad m => (a -> b -> m c) -> Vector n a -> Vector n b -> m (Vector n c)
- izipWithM :: Monad m => (Finite n -> a -> b -> m c) -> Vector n a -> Vector n b -> m (Vector n c)
- zipWithM_ :: Monad m => (a -> b -> m c) -> Vector n a -> Vector n b -> m ()
- izipWithM_ :: Monad m => (Finite n -> a -> b -> m c) -> Vector n a -> Vector n b -> m ()
- unzip :: Vector n (a, b) -> (Vector n a, Vector n b)
- unzip3 :: Vector n (a, b, c) -> (Vector n a, Vector n b, Vector n c)
- unzip4 :: Vector n (a, b, c, d) -> (Vector n a, Vector n b, Vector n c, Vector n d)
- unzip5 :: Vector n (a, b, c, d, e) -> (Vector n a, Vector n b, Vector n c, Vector n d, Vector n e)
- unzip6 :: Vector n (a, b, c, d, e, f) -> (Vector n a, Vector n b, Vector n c, Vector n d, Vector n e, Vector n f)
- elem :: Eq a => a -> Vector n a -> Bool
- notElem :: Eq a => a -> Vector n a -> Bool
- find :: (a -> Bool) -> Vector n a -> Maybe a
- findIndex :: (a -> Bool) -> Vector n a -> Maybe (Finite n)
- elemIndex :: Eq a => a -> Vector n a -> Maybe (Finite n)
- foldl :: (a -> b -> a) -> a -> Vector n b -> a
- foldl1 :: (a -> a -> a) -> Vector (1 + n) a -> a
- foldl' :: (a -> b -> a) -> a -> Vector n b -> a
- foldl1' :: (a -> a -> a) -> Vector (1 + n) a -> a
- foldr :: (a -> b -> b) -> b -> Vector n a -> b
- foldr1 :: (a -> a -> a) -> Vector (n + 1) a -> a
- foldr' :: (a -> b -> b) -> b -> Vector n a -> b
- foldr1' :: (a -> a -> a) -> Vector (n + 1) a -> a
- ifoldl :: (a -> Finite n -> b -> a) -> a -> Vector n b -> a
- ifoldl' :: (a -> Finite n -> b -> a) -> a -> Vector n b -> a
- ifoldr :: (Finite n -> a -> b -> b) -> b -> Vector n a -> b
- ifoldr' :: (Finite n -> a -> b -> b) -> b -> Vector n a -> b
- all :: (a -> Bool) -> Vector n a -> Bool
- any :: (a -> Bool) -> Vector n a -> Bool
- and :: Vector n Bool -> Bool
- or :: Vector n Bool -> Bool
- sum :: Num a => Vector n a -> a
- product :: Num a => Vector n a -> a
- maximum :: Ord a => Vector (n + 1) a -> a
- maximumBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> a
- minimum :: Ord a => Vector (n + 1) a -> a
- minimumBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> a
- maxIndex :: Ord a => Vector (n + 1) a -> Finite (n + 1)
- maxIndexBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> Finite (n + 1)
- minIndex :: Ord a => Vector (n + 1) a -> Finite (n + 1)
- minIndexBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> Finite (n + 1)
- foldM :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m a
- ifoldM :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m a
- fold1M :: Monad m => (a -> a -> m a) -> Vector (1 + n) a -> m a
- foldM' :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m a
- ifoldM' :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m a
- fold1M' :: Monad m => (a -> a -> m a) -> Vector (n + 1) a -> m a
- foldM_ :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m ()
- ifoldM_ :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m ()
- fold1M_ :: Monad m => (a -> a -> m a) -> Vector (n + 1) a -> m ()
- foldM'_ :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m ()
- ifoldM'_ :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m ()
- fold1M'_ :: Monad m => (a -> a -> m a) -> Vector (n + 1) a -> m ()
- sequence :: Monad m => Vector n (m a) -> m (Vector n a)
- sequence_ :: Monad m => Vector n (m a) -> m ()
- prescanl :: (a -> b -> a) -> a -> Vector n b -> Vector n a
- prescanl' :: (a -> b -> a) -> a -> Vector n b -> Vector n a
- postscanl :: (a -> b -> a) -> a -> Vector n b -> Vector n a
- postscanl' :: (a -> b -> a) -> a -> Vector n b -> Vector n a
- scanl :: (a -> b -> a) -> a -> Vector n b -> Vector (1 + n) a
- scanl' :: (a -> b -> a) -> a -> Vector n b -> Vector (1 + n) a
- scanl1 :: (a -> a -> a) -> Vector (1 + n) a -> Vector (2 + n) a
- scanl1' :: (a -> a -> a) -> Vector (1 + n) a -> Vector (2 + n) a
- prescanr :: (a -> b -> b) -> b -> Vector n a -> Vector n b
- prescanr' :: (a -> b -> b) -> b -> Vector n a -> Vector n b
- postscanr :: (a -> b -> b) -> b -> Vector n a -> Vector n b
- postscanr' :: (a -> b -> b) -> b -> Vector n a -> Vector n b
- scanr :: (a -> b -> b) -> b -> Vector n a -> Vector (n + 1) b
- scanr' :: (a -> b -> b) -> b -> Vector n a -> Vector (n + 1) b
- scanr1 :: (a -> a -> a) -> Vector (n + 1) a -> Vector (n + 2) a
- scanr1' :: (a -> a -> a) -> Vector (n + 1) a -> Vector (n + 2) a
- toList :: Vector n a -> [a]
- fromList :: KnownNat n => [a] -> Maybe (Vector n a)
- fromListN :: forall n a. KnownNat n => [a] -> Maybe (Vector n a)
- fromListN' :: forall n a p. KnownNat n => p n -> [a] -> Maybe (Vector n a)
- withSizedList :: forall a r. [a] -> (forall n. KnownNat n => Vector n a -> r) -> r
- freeze :: PrimMonad m => MVector n (PrimState m) a -> m (Vector n a)
- thaw :: PrimMonad m => Vector n a -> m (MVector n (PrimState m) a)
- copy :: PrimMonad m => MVector n (PrimState m) a -> Vector n a -> m ()
- unsafeFreeze :: PrimMonad m => MVector n (PrimState m) a -> m (Vector n a)
- unsafeThaw :: PrimMonad m => Vector n a -> m (MVector n (PrimState m) a)
- toSized :: forall n a. KnownNat n => Vector a -> Maybe (Vector n a)
- withSized :: forall a r. Vector a -> (forall n. KnownNat n => Vector n a -> r) -> r
- fromSized :: Vector n a -> Vector a
- withVectorUnsafe :: (Vector a -> Vector b) -> Vector n a -> Vector n b

# Documentation

pattern SomeSized :: () => KnownNat n => Vector n a -> Vector a Source #

Pattern synonym that lets you treat an unsized vector as if it
"contained" a sized vector. If you pattern match on an unsized vector,
its contents will be the *sized* vector counterpart.

testFunc :: Unsized.Vector Int -> Int testFunc (`SomeSized`

v) =`sum`

(`zipWith`

(+) v (`replicate`

1)) -- ^ here, v is `Sized.Vector n Int`, and we have ``KnownNat`

n`

The `n`

type variable will be properly instantiated to whatever the
length of the vector is, and you will also have a

instance available. You can get `KnownNat`

n`n`

in scope by turning on
ScopedTypeVariables and matching on

.`SomeSized`

(v :: Sized.Vector
n Int)

Without this, you would otherwise have to use `withSized`

to do the same
thing:

testFunc :: Unsized.Vector Int -> Int testFunc u =`withSized`

u $ \v ->`sum`

(`zipWith`

(+) v (`replicate`

1))

Remember that the type of final result of your function (the `Int`

,
here) must *not* depend on `n`

. However, the types of the intermediate
values are allowed to depend on `n`

.

This is *especially* useful in do blocks, where you can pattern match on
the unsized results of actions, to use the sized vector in the rest of
the do block. You also get a

constraint for the
remainder of the do block.`KnownNat`

n

-- If you had: getAVector :: IO (Unsized.Vector Int) main :: IO () main = do SomeSized v <- getAVector -- v is `Sized.Vector n Int` -- get n in scope SomeSized (v :: Sized.Vector n Int) <- getAVector print v

Remember that the final type of the result of the do block ('()', here)
must not depend on `n`

. However, the

Also useful in ghci, where you can pattern match to get sized vectors from unsized vectors.

ghci> SomeSized v <- pure (myUnsizedVector :: Unsized.Vector Int) -- ^ v is `Sized.Vector n Int`

This enables interactive exploration with sized vectors in ghci, and is useful for using with other libraries and functions that expect sized vectors in an interactive setting.

(Note that as of GHC 8.6, you cannot get the `n`

in scope in your ghci
session using ScopedTypeVariables, like you can with do blocks)

You can also use this as a constructor, to take a sized vector and "hide" the size, to produce an unsized vector:

SomeSized :: Sized.Vector n a -> Unsized.Vector a

# Accessors

## Length information

:: Vector n a | a vector of some (potentially unknown) length |

-> (KnownNat n => r) | a value that depends on knowing the vector's length |

-> r | the value computed with the length |

*O(1)* Reveal a `KnownNat`

instance for a vector's length, determined
at runtime.

## Indexing

index' :: forall n m a p. KnownNat n => Vector ((n + m) + 1) a -> p n -> a Source #

*O(1)* Safe indexing using a `Proxy`

.

unsafeIndex :: forall n a. Vector n a -> Int -> a Source #

*O(1)* Indexing using an `Int`

without bounds checking.

head :: forall n a. Vector (1 + n) a -> a Source #

*O(1)* Yield the first element of a non-empty vector.

last :: forall n a. Vector (n + 1) a -> a Source #

*O(1)* Yield the last element of a non-empty vector.

## Monadic indexing

indexM :: forall n a m. Monad m => Vector n a -> Finite n -> m a Source #

*O(1)* Safe indexing in a monad. See the documentation for
`indexM`

for an explanation of why this is useful.

unsafeIndexM :: forall n a m. Monad m => Vector n a -> Int -> m a Source #

*O(1)* Indexing using an Int without bounds checking. See the
documentation for `indexM`

for an explanation of why this is useful.

headM :: forall n a m. Monad m => Vector (1 + n) a -> m a Source #

*O(1)* Yield the first element of a non-empty vector in a monad. See the
documentation for `indexM`

for an explanation of why this is useful.

lastM :: forall n a m. Monad m => Vector (n + 1) a -> m a Source #

*O(1)* Yield the last element of a non-empty vector in a monad. See the
documentation for `indexM`

for an explanation of why this is useful.

## Extracting subvectors (slicing)

*O(1)* Yield a slice of the vector without copying it with an inferred
length argument.

*O(1)* Yield a slice of the vector without copying it with an explicit
length argument.

init :: forall n a. Vector (n + 1) a -> Vector n a Source #

*O(1)* Yield all but the last element of a non-empty vector without
copying.

tail :: forall n a. Vector (1 + n) a -> Vector n a Source #

*O(1)* Yield all but the first element of a non-empty vector without
copying.

take :: forall n m a. KnownNat n => Vector (n + m) a -> Vector n a Source #

*O(1)* Yield the first `n`

elements. The resulting vector always contains
this many elements. The length of the resulting vector is inferred from the
type.

take' :: forall n m a p. KnownNat n => p n -> Vector (n + m) a -> Vector n a Source #

*O(1)* Yield the first `n`

elements. The resulting vector always contains
this many elements. The length of the resulting vector is given explicitly
as a `Proxy`

argument.

drop :: forall n m a. KnownNat n => Vector (n + m) a -> Vector m a Source #

*O(1)* Yield all but the the first `n`

elements. The given vector must
contain at least this many elements. The length of the resulting vector is
inferred from the type.

drop' :: forall n m a p. KnownNat n => p n -> Vector (n + m) a -> Vector m a Source #

*O(1)* Yield all but the the first `n`

elements. The given vector must
contain at least this many elements. The length of the resulting vector is
givel explicitly as a `Proxy`

argument.

splitAt :: forall n m a. KnownNat n => Vector (n + m) a -> (Vector n a, Vector m a) Source #

*O(1)* Yield the first `n`

elements paired with the remainder without copying.
The lengths of the resulting vectors are inferred from the type.

splitAt' :: forall n m a p. KnownNat n => p n -> Vector (n + m) a -> (Vector n a, Vector m a) Source #

*O(1)* Yield the first `n`

elements, paired with the rest, without
copying. The length of the first resulting vector is passed explicitly as a
`Proxy`

argument.

# Construction

## Initialization

fromTuple :: forall input length ty. (IndexedListLiterals input length ty, KnownNat length) => input -> Vector length ty Source #

*O(n)* Construct a vector in a type safe manner.
```
fromTuple (1,2) :: Vector 2 Int
fromTuple ("hey", "what's", "going", "on") :: Vector 4 String
```

replicate :: forall n a. KnownNat n => a -> Vector n a Source #

*O(n)* Construct a vector with the same element in each position where the
length is inferred from the type.

replicate' :: forall n a p. KnownNat n => p n -> a -> Vector n a Source #

*O(n)* Construct a vector with the same element in each position where the
length is given explicitly as a `Proxy`

argument.

generate :: forall n a. KnownNat n => (Finite n -> a) -> Vector n a Source #

*O(n)* construct a vector of the given length by applying the function to
each index where the length is inferred from the type.

generate' :: forall n a p. KnownNat n => p n -> (Finite n -> a) -> Vector n a Source #

*O(n)* construct a vector of the given length by applying the function to
each index where the length is given explicitly as a `Proxy`

argument.

iterateN :: forall n a. KnownNat n => (a -> a) -> a -> Vector n a Source #

*O(n)* Apply the function `n`

times to a value. Zeroth element is original value.
The length is inferred from the type.

iterateN' :: forall n a p. KnownNat n => p n -> (a -> a) -> a -> Vector n a Source #

*O(n)* Apply the function `n`

times to a value. Zeroth element is original value.
The length is given explicitly as a `Proxy`

argument.

## Monadic initialization

replicateM :: forall n m a. (KnownNat n, Monad m) => m a -> m (Vector n a) Source #

*O(n)* Execute the monadic action `n`

times and store the results in a
vector where `n`

is inferred from the type.

replicateM' :: forall n m a p. (KnownNat n, Monad m) => p n -> m a -> m (Vector n a) Source #

*O(n)* Execute the monadic action `n`

times and store the results in a
vector where `n`

is given explicitly as a `Proxy`

argument.

generateM :: forall n m a. (KnownNat n, Monad m) => (Finite n -> m a) -> m (Vector n a) Source #

*O(n)* Construct a vector of length `n`

by applying the monadic action to
each index where n is inferred from the type.

generateM' :: forall n m a p. (KnownNat n, Monad m) => p n -> (Finite n -> m a) -> m (Vector n a) Source #

*O(n)* Construct a vector of length `n`

by applying the monadic action to
each index where n is given explicitly as a `Proxy`

argument.

## Unfolding

unfoldrN :: forall n a b. KnownNat n => (b -> (a, b)) -> b -> Vector n a Source #

*O(n)* Construct a vector with exactly `n`

elements by repeatedly applying
the generator function to the a seed. The length is inferred from the
type.

unfoldrN' :: forall n a b p. KnownNat n => p n -> (b -> (a, b)) -> b -> Vector n a Source #

*O(n)* Construct a vector with exactly `n`

elements by repeatedly applying
the generator function to the a seed. The length is given explicitly
as a `Proxy`

argument.

## Enumeration

enumFromN :: forall n a. (KnownNat n, Num a) => a -> Vector n a Source #

*O(n)* Yield a vector of length `n`

containing the values `x`

, `x+1`

, ...,
`x + (n - 1)`

. The length is inferred from the type.

enumFromN' :: forall n a p. (KnownNat n, Num a) => a -> p n -> Vector n a Source #

*O(n)* Yield a vector of length `n`

containing the values `x`

, `x+1`

, ...,
`x + (n - 1)`

. The length is given explicitly as a `Proxy`

argument.

enumFromStepN :: forall n a. (KnownNat n, Num a) => a -> a -> Vector n a Source #

*O(n)* Yield a vector of the given length containing the values `x`

, `x+y`

,
`x+2y`

, ... , `x + (n - 1)y`

. The length is inferred from the type.

enumFromStepN' :: forall n a p. (KnownNat n, Num a) => a -> a -> p n -> Vector n a Source #

*O(n)* Yield a vector of the given length containing the values `x`

, `x+y`

,
`x+2y`

, ... , `x + (n - 1)y`

. The length is given explicitly as a `Proxy`

argument.

## Concatenation

(++) :: forall n m a. Vector n a -> Vector m a -> Vector (n + m) a Source #

*O(m+n)* Concatenate two vectors.

## Restricting memory usage

force :: Vector n a -> Vector n a Source #

*O(n)* Yield the argument but force it not to retain any extra memory,
possibly by copying it.

This is especially useful when dealing with slices. For example:

force (slice 0 2 <huge vector>)

Here, the slice retains a reference to the huge vector. Forcing it creates a copy of just the elements that belong to the slice and allows the huge vector to be garbage collected.

# Modifying vectors

## Bulk updates

:: Vector m a | initial vector (of length |

-> [(Finite m, a)] | list of index/value pairs (of length |

-> Vector m a |

*O(m+n)* For each pair `(i,a)`

from the list, replace the vector
element at position `i`

by `a`

.

<5,9,2,7> // [(2,1),(0,3),(2,8)] = <3,9,8,7>

:: Vector m a | initial vector (of length |

-> Vector n (Int, a) | vector of index/value pairs (of length |

-> Vector m a |

*O(m+n)* For each pair `(i,a)`

from the vector of index/value pairs,
replace the vector element at position `i`

by `a`

.

update <5,9,2,7> <(2,1),(0,3),(2,8)> = <3,9,8,7>

:: Vector m a | initial vector (of length |

-> Vector n Int | index vector (of length |

-> Vector n a | value vector (of length |

-> Vector m a |

*O(m+n)* For each index `i`

from the index vector and the
corresponding value `a`

from the value vector, replace the element of the
initial vector at position `i`

by `a`

.

update_ <5,9,2,7> <2,0,2> <1,3,8> = <3,9,8,7>

This function is useful for instances of `Vector`

that cannot store pairs.
Otherwise, `update`

is probably more convenient.

update_ xs is ys =`update`

xs (`zip`

is ys)

:: Vector m a | initial vector (of length |

-> [(Int, a)] | list of index/value pairs (of length |

-> Vector m a |

Same as (`//`

) but without bounds checking.

:: Vector m a | initial vector (of length |

-> Vector n (Int, a) | vector of index/value pairs (of length |

-> Vector m a |

Same as `update`

but without bounds checking.

:: Vector m a | initial vector (of length |

-> Vector n Int | index vector (of length |

-> Vector n a | value vector (of length |

-> Vector m a |

Same as `update_`

but without bounds checking.

## Accumulations

:: (a -> b -> a) | accumulating function |

-> Vector m a | initial vector (of length |

-> [(Int, b)] | list of index/value pairs (of length |

-> Vector m a |

*O(m+n)* For each pair `(i,b)`

from the list, replace the vector element
`a`

at position `i`

by `f a b`

.

accum (+) <5,9,2> [(2,4),(1,6),(0,3),(1,7)] = <5+3, 9+6+7, 2+4>

:: (a -> b -> a) | accumulating function |

-> Vector m a | initial vector (of length |

-> Vector n (Int, b) | vector of index/value pairs (of length |

-> Vector m a |

*O(m+n)* For each pair `(i,b)`

from the vector of pairs, replace the vector
element `a`

at position `i`

by `f a b`

.

accumulate (+) <5,9,2> <(2,4),(1,6),(0,3),(1,7)> = <5+3, 9+6+7, 2+4>

:: (a -> b -> a) | accumulating function |

-> Vector m a | initial vector (of length |

-> Vector n Int | index vector (of length |

-> Vector n b | value vector (of length |

-> Vector m a |

*O(m+n)* For each index `i`

from the index vector and the
corresponding value `b`

from the the value vector,
replace the element of the initial vector at
position `i`

by `f a b`

.

accumulate_ (+) <5,9,2> <2,1,0,1> <4,6,3,7> = <5+3, 9+6+7, 2+4>

This function is useful for instances of `Vector`

that cannot store pairs.
Otherwise, `accumulate`

is probably more convenient:

accumulate_ f as is bs =`accumulate`

f as (`zip`

is bs)

:: (a -> b -> a) | accumulating function |

-> Vector m a | initial vector (of length |

-> [(Int, b)] | list of index/value pairs (of length |

-> Vector m a |

Same as `accum`

but without bounds checking.

:: (a -> b -> a) | accumulating function |

-> Vector m a | initial vector (of length |

-> Vector n (Int, b) | vector of index/value pairs (of length |

-> Vector m a |

Same as `accumulate`

but without bounds checking.

:: (a -> b -> a) | accumulating function |

-> Vector m a | initial vector (of length |

-> Vector n Int | index vector (of length |

-> Vector n b | value vector (of length |

-> Vector m a |

Same as `accumulate_`

but without bounds checking.

## Permutations

*O(n)* Yield the vector obtained by replacing each element `i`

of the
index vector by `xs`

. This is equivalent to `!`

i

but is
often much more efficient.`map`

(xs`!`

) is

backpermute <a,b,c,d> <0,3,2,3,1,0> = <a,d,c,d,b,a>

Same as `backpermute`

but without bounds checking.

# Lenses

ix :: forall n a f. Functor f => Finite n -> (a -> f a) -> Vector n a -> f (Vector n a) Source #

Lens to access (*O(1)*) and update (*O(n)*) an arbitrary element by its index.

_head :: forall n a f. Functor f => (a -> f a) -> Vector (1 + n) a -> f (Vector (1 + n) a) Source #

Lens to access (*O(1)*) and update (*O(n)*) the first element of a non-empty vector.

_last :: forall n a f. Functor f => (a -> f a) -> Vector (n + 1) a -> f (Vector (n + 1) a) Source #

Lens to access (*O(1)*) and update (*O(n)*) the last element of a non-empty vector.

# Elementwise operations

## Indexing

indexed :: Vector n a -> Vector n (Finite n, a) Source #

*O(n)* Pair each element in a vector with its index.

## Mapping

imap :: (Finite n -> a -> b) -> Vector n a -> Vector n b Source #

*O(n)* Apply a function to every element of a vector and its index.

concatMap :: (a -> Vector m b) -> Vector n a -> Vector (n * m) b Source #

*O(n*m)* Map a function over a vector and concatenate the results. The
function is required to always return the same length vector.

## Monadic mapping

mapM :: Monad m => (a -> m b) -> Vector n a -> m (Vector n b) Source #

*O(n)* Apply the monadic action to all elements of the vector, yielding a
vector of results.

imapM :: Monad m => (Finite n -> a -> m b) -> Vector n a -> m (Vector n b) Source #

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

mapM_ :: Monad m => (a -> m b) -> Vector n a -> m () Source #

*O(n)* Apply the monadic action to all elements of a vector and ignore the
results.

imapM_ :: Monad m => (Finite n -> a -> m b) -> Vector n a -> m () Source #

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

forM :: Monad m => Vector n a -> (a -> m b) -> m (Vector n b) Source #

*O(n)* Apply the monadic action to all elements of the vector, yielding a
vector of results. Equvalent to `flip `

.`mapM`

forM_ :: Monad m => Vector n a -> (a -> m b) -> m () Source #

*O(n)* Apply the monadic action to all elements of a vector and ignore the
results. Equivalent to `flip `

.`mapM_`

## Zipping

zipWith :: (a -> b -> c) -> Vector n a -> Vector n b -> Vector n c Source #

*O(n)* Zip two vectors of the same length with the given function.

zipWith3 :: (a -> b -> c -> d) -> Vector n a -> Vector n b -> Vector n c -> Vector n d Source #

Zip three vectors with the given function.

zipWith4 :: (a -> b -> c -> d -> e) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e Source #

zipWith5 :: (a -> b -> c -> d -> e -> f) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f Source #

zipWith6 :: (a -> b -> c -> d -> e -> f -> g) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f -> Vector n g Source #

izipWith :: (Finite n -> a -> b -> c) -> Vector n a -> Vector n b -> Vector n c Source #

*O(n)* Zip two vectors of the same length with a function that also takes
the elements' indices).

izipWith3 :: (Finite n -> a -> b -> c -> d) -> Vector n a -> Vector n b -> Vector n c -> Vector n d Source #

izipWith4 :: (Finite n -> a -> b -> c -> d -> e) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e Source #

izipWith5 :: (Finite n -> a -> b -> c -> d -> e -> f) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f Source #

izipWith6 :: (Finite n -> a -> b -> c -> d -> e -> f -> g) -> Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f -> Vector n g Source #

zip5 :: Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n (a, b, c, d, e) Source #

zip6 :: Vector n a -> Vector n b -> Vector n c -> Vector n d -> Vector n e -> Vector n f -> Vector n (a, b, c, d, e, f) Source #

## Monadic zipping

zipWithM :: Monad m => (a -> b -> m c) -> Vector n a -> Vector n b -> m (Vector n c) Source #

*O(n)* Zip the two vectors of the same length with the monadic action and
yield a vector of results.

izipWithM :: Monad m => (Finite n -> a -> b -> m c) -> Vector n a -> Vector n b -> m (Vector n c) Source #

*O(n)* Zip the two vectors with a monadic action that also takes the
element index and yield a vector of results.

zipWithM_ :: Monad m => (a -> b -> m c) -> Vector n a -> Vector n b -> m () Source #

*O(n)* Zip the two vectors with the monadic action and ignore the results.

izipWithM_ :: Monad m => (Finite n -> a -> b -> m c) -> Vector n a -> Vector n b -> m () Source #

*O(n)* Zip the two vectors with a monadic action that also takes
the element index and ignore the results.

## Unzipping

unzip5 :: Vector n (a, b, c, d, e) -> (Vector n a, Vector n b, Vector n c, Vector n d, Vector n e) Source #

unzip6 :: Vector n (a, b, c, d, e, f) -> (Vector n a, Vector n b, Vector n c, Vector n d, Vector n e, Vector n f) Source #

# Working with predicates

## Searching

elem :: Eq a => a -> Vector n a -> Bool infix 4 Source #

*O(n)* Check if the vector contains an element.

notElem :: Eq a => a -> Vector n a -> Bool infix 4 Source #

*O(n)* Check if the vector does not contain an element (inverse of `elem`

).

# Folding

foldl1' :: (a -> a -> a) -> Vector (1 + n) a -> a Source #

*O(n)* Left fold on non-empty vectors with strict accumulator.

foldr1' :: (a -> a -> a) -> Vector (n + 1) a -> a Source #

*O(n)* Right fold on non-empty vectors with strict accumulator.

ifoldl :: (a -> Finite n -> b -> a) -> a -> Vector n b -> a Source #

*O(n)* Left fold (function applied to each element and its index).

ifoldl' :: (a -> Finite n -> b -> a) -> a -> Vector n b -> a Source #

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

ifoldr :: (Finite n -> a -> b -> b) -> b -> Vector n a -> b Source #

*O(n)* Right fold (function applied to each element and its index).

ifoldr' :: (Finite n -> a -> b -> b) -> b -> Vector n a -> b Source #

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

## Specialised folds

maximum :: Ord a => Vector (n + 1) a -> a Source #

*O(n)* Yield the maximum element of the non-empty vector.

maximumBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> a Source #

*O(n)* Yield the maximum element of the non-empty vector according to the
given comparison function.

minimum :: Ord a => Vector (n + 1) a -> a Source #

*O(n)* Yield the minimum element of the non-empty vector.

minimumBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> a Source #

*O(n)* Yield the minimum element of the non-empty vector according to the
given comparison function.

maxIndex :: Ord a => Vector (n + 1) a -> Finite (n + 1) Source #

*O(n)* Yield the index of the maximum element of the non-empty vector.

maxIndexBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> Finite (n + 1) Source #

*O(n)* Yield the index of the maximum element of the non-empty vector
according to the given comparison function.

minIndex :: Ord a => Vector (n + 1) a -> Finite (n + 1) Source #

*O(n)* Yield the index of the minimum element of the non-empty vector.

minIndexBy :: (a -> a -> Ordering) -> Vector (n + 1) a -> Finite (n + 1) Source #

*O(n)* Yield the index of the minimum element of the non-empty vector
according to the given comparison function.

## Monadic folds

ifoldM :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m a Source #

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

fold1M :: Monad m => (a -> a -> m a) -> Vector (1 + n) a -> m a Source #

*O(n)* Monadic fold over non-empty vectors.

foldM' :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m a Source #

*O(n)* Monadic fold with strict accumulator.

ifoldM' :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m a Source #

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

fold1M' :: Monad m => (a -> a -> m a) -> Vector (n + 1) a -> m a Source #

*O(n)* Monadic fold over non-empty vectors with strict accumulator.

foldM_ :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m () Source #

*O(n)* Monadic fold that discards the result.

ifoldM_ :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m () Source #

*O(n)* Monadic fold that discards the result (action applied to
each element and its index).

fold1M_ :: Monad m => (a -> a -> m a) -> Vector (n + 1) a -> m () Source #

*O(n)* Monadic fold over non-empty vectors that discards the result.

foldM'_ :: Monad m => (a -> b -> m a) -> a -> Vector n b -> m () Source #

*O(n)* Monadic fold with strict accumulator that discards the result.

ifoldM'_ :: Monad m => (a -> Finite n -> b -> m a) -> a -> Vector n b -> m () Source #

*O(n)* Monadic fold with strict accumulator that discards the result
(action applied to each element and its index).

fold1M'_ :: Monad m => (a -> a -> m a) -> Vector (n + 1) a -> m () Source #

*O(n)* Monad fold over non-empty vectors with strict accumulator
that discards the result.

## Monadic sequencing

sequence :: Monad m => Vector n (m a) -> m (Vector n a) Source #

Evaluate each action and collect the results.

sequence_ :: Monad m => Vector n (m a) -> m () Source #

Evaluate each action and discard the results.

# Prefix sums (scans)

prescanl' :: (a -> b -> a) -> a -> Vector n b -> Vector n a Source #

*O(n)* Prescan with strict accumulator.

postscanl' :: (a -> b -> a) -> a -> Vector n b -> Vector n a Source #

*O(n)* Scan with strict accumulator.

scanl' :: (a -> b -> a) -> a -> Vector n b -> Vector (1 + n) a Source #

*O(n)* Haskell-style scan with strict accumulator.

scanl1 :: (a -> a -> a) -> Vector (1 + n) a -> Vector (2 + n) a Source #

*O(n)* Scan over a non-empty vector.

scanl1' :: (a -> a -> a) -> Vector (1 + n) a -> Vector (2 + n) a Source #

*O(n)* Scan over a non-empty vector with a strict accumulator.

prescanr' :: (a -> b -> b) -> b -> Vector n a -> Vector n b Source #

*O(n)* Right-to-left prescan with strict accumulator.

postscanr' :: (a -> b -> b) -> b -> Vector n a -> Vector n b Source #

*O(n)* Right-to-left scan with strict accumulator.

scanr :: (a -> b -> b) -> b -> Vector n a -> Vector (n + 1) b Source #

*O(n)* Right-to-left Haskell-style scan.

scanr' :: (a -> b -> b) -> b -> Vector n a -> Vector (n + 1) b Source #

*O(n)* Right-to-left Haskell-style scan with strict accumulator.

scanr1 :: (a -> a -> a) -> Vector (n + 1) a -> Vector (n + 2) a Source #

*O(n)* Right-to-left scan over a non-empty vector.

scanr1' :: (a -> a -> a) -> Vector (n + 1) a -> Vector (n + 2) a Source #

*O(n)* Right-to-left scan over a non-empty vector with a strict
accumulator.

# Conversions

## Lists

fromListN :: forall n a. KnownNat n => [a] -> Maybe (Vector n a) Source #

*O(n)* Convert the first `n`

elements of a list to a vector. The length of
the resulting vector is inferred from the type.

fromListN' :: forall n a p. KnownNat n => p n -> [a] -> Maybe (Vector n a) Source #

*O(n)* Convert the first `n`

elements of a list to a vector. The length of
the resulting vector is given explicitly as a `Proxy`

argument.

withSizedList :: forall a r. [a] -> (forall n. KnownNat n => Vector n a -> r) -> r Source #

*O(n)* Takes a list and returns a continuation providing a vector with
a size parameter corresponding to the length of the list.

Essentially converts a list into a vector with the proper size parameter, determined at runtime.

See `withSized`

## Mutable vectors

freeze :: PrimMonad m => MVector n (PrimState m) a -> m (Vector n a) Source #

*O(n)* Yield an immutable copy of the mutable vector.

thaw :: PrimMonad m => Vector n a -> m (MVector n (PrimState m) a) Source #

*O(n)* Yield a mutable copy of the immutable vector.

copy :: PrimMonad m => MVector n (PrimState m) a -> Vector n a -> m () Source #

*O(n)* Copy an immutable vector into a mutable one.

unsafeFreeze :: PrimMonad m => MVector n (PrimState m) a -> m (Vector n a) Source #

*O(1)* Unsafely convert a mutable vector to an immutable one without
copying. The mutable vector may not be used after this operation.

unsafeThaw :: PrimMonad m => Vector n a -> m (MVector n (PrimState m) a) Source #

*O(n)* Unsafely convert an immutable vector to a mutable one without
copying. The immutable vector may not be used after this operation.