Portability | portable |
---|---|

Maintainer | jmillikin@gmail.com |

Safe Haskell | Safe-Infered |

This module is intended to be imported qualified:

import qualified Data.Enumerator.List as EL

Since: 0.4.5

- fold :: Monad m => (b -> a -> b) -> b -> Iteratee a m b
- foldM :: Monad m => (b -> a -> m b) -> b -> Iteratee a m b
- map :: Monad m => (ao -> ai) -> Enumeratee ao ai m b
- mapM :: Monad m => (ao -> m ai) -> Enumeratee ao ai m b
- mapM_ :: Monad m => (a -> m b) -> Iteratee a m ()
- concatMap :: Monad m => (ao -> [ai]) -> Enumeratee ao ai m b
- concatMapM :: Monad m => (ao -> m [ai]) -> Enumeratee ao ai m b
- mapAccum :: Monad m => (s -> ao -> (s, ai)) -> s -> Enumeratee ao ai m b
- mapAccumM :: Monad m => (s -> ao -> m (s, ai)) -> s -> Enumeratee ao ai m b
- concatMapAccum :: Monad m => (s -> ao -> (s, [ai])) -> s -> Enumeratee ao ai m b
- concatMapAccumM :: Monad m => (s -> ao -> m (s, [ai])) -> s -> Enumeratee ao ai m b
- iterate :: Monad m => (a -> a) -> a -> Enumerator a m b
- iterateM :: Monad m => (a -> m a) -> a -> Enumerator a m b
- repeat :: Monad m => a -> Enumerator a m b
- repeatM :: Monad m => m a -> Enumerator a m b
- replicate :: Monad m => Integer -> a -> Enumerator a m b
- replicateM :: Monad m => Integer -> m a -> Enumerator a m b
- generateM :: Monad m => m (Maybe a) -> Enumerator a m b
- unfold :: Monad m => (s -> Maybe (a, s)) -> s -> Enumerator a m b
- unfoldM :: Monad m => (s -> m (Maybe (a, s))) -> s -> Enumerator a m b
- drop :: Monad m => Integer -> Iteratee a m ()
- dropWhile :: Monad m => (a -> Bool) -> Iteratee a m ()
- filter :: Monad m => (a -> Bool) -> Enumeratee a a m b
- filterM :: Monad m => (a -> m Bool) -> Enumeratee a a m b
- unique :: (Ord a, Monad m) => Enumeratee a a m b
- head :: Monad m => Iteratee a m (Maybe a)
- head_ :: Monad m => Iteratee a m a
- take :: Monad m => Integer -> Iteratee a m [a]
- takeWhile :: Monad m => (a -> Bool) -> Iteratee a m [a]
- consume :: Monad m => Iteratee a m [a]
- zip :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m (b1, b2)
- zip3 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m (b1, b2, b3)
- zip4 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m (b1, b2, b3, b4)
- zip5 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m (b1, b2, b3, b4, b5)
- zip6 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m (b1, b2, b3, b4, b5, b6)
- zip7 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m b7 -> Iteratee a m (b1, b2, b3, b4, b5, b6, b7)
- zipWith :: Monad m => (b1 -> b2 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m c
- zipWith3 :: Monad m => (b1 -> b2 -> b3 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m c
- zipWith4 :: Monad m => (b1 -> b2 -> b3 -> b4 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m c
- zipWith5 :: Monad m => (b1 -> b2 -> b3 -> b4 -> b5 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m c
- zipWith6 :: Monad m => (b1 -> b2 -> b3 -> b4 -> b5 -> b6 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m c
- zipWith7 :: Monad m => (b1 -> b2 -> b3 -> b4 -> b5 -> b6 -> b7 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m b7 -> Iteratee a m c
- require :: Monad m => Integer -> Iteratee a m ()
- isolate :: Monad m => Integer -> Enumeratee a a m b
- isolateWhile :: Monad m => (a -> Bool) -> Enumeratee a a m b
- splitWhen :: Monad m => (a -> Bool) -> Enumeratee a [a] m b

# List analogues

## Folds

fold :: Monad m => (b -> a -> b) -> b -> Iteratee a m bSource

Consume the entire input stream with a strict left fold, one element at a time.

Since: 0.4.8

foldM :: Monad m => (b -> a -> m b) -> b -> Iteratee a m bSource

Consume the entire input stream with a strict monadic left fold, one element at a time.

Since: 0.4.8

## Maps

map :: Monad m => (ao -> ai) -> Enumeratee ao ai m bSource

applies `map`

f*f* to each input element and
feeds the resulting outputs to the inner iteratee.

Since: 0.4.8

mapM :: Monad m => (ao -> m ai) -> Enumeratee ao ai m bSource

applies `mapM`

f*f* to each input element and
feeds the resulting outputs to the inner iteratee.

Since: 0.4.8

mapM_ :: Monad m => (a -> m b) -> Iteratee a m ()Source

applies `mapM_`

f*f* to each input element, and
discards the results.

Since: 0.4.11

concatMap :: Monad m => (ao -> [ai]) -> Enumeratee ao ai m bSource

applies `concatMap`

f*f* to each input element
and feeds the resulting outputs to the inner iteratee.

Since: 0.4.8

concatMapM :: Monad m => (ao -> m [ai]) -> Enumeratee ao ai m bSource

applies `concatMapM`

f*f* to each input element and feeds the
resulting outputs to the inner iteratee.

Since: 0.4.8

## Accumulating maps

mapAccum :: Monad m => (s -> ao -> (s, ai)) -> s -> Enumeratee ao ai m bSource

Similar to `map`

, but with a stateful step function.

Since: 0.4.9

mapAccumM :: Monad m => (s -> ao -> m (s, ai)) -> s -> Enumeratee ao ai m bSource

Similar to `mapM`

, but with a stateful step function.

Since: 0.4.9

concatMapAccum :: Monad m => (s -> ao -> (s, [ai])) -> s -> Enumeratee ao ai m bSource

Similar to `concatMap`

, but with a stateful step
function.

Since: 0.4.11

concatMapAccumM :: Monad m => (s -> ao -> m (s, [ai])) -> s -> Enumeratee ao ai m bSource

Similar to `concatMapM`

, but with a stateful step function.

Since: 0.4.11

## Infinite streams

iterate :: Monad m => (a -> a) -> a -> Enumerator a m bSource

iterateM :: Monad m => (a -> m a) -> a -> Enumerator a m bSource

Similar to `iterate`

, except the iteration
function is monadic.

Since: 0.4.8

repeat :: Monad m => a -> Enumerator a m bSource

repeatM :: Monad m => m a -> Enumerator a m bSource

Enumerates an infinite stream of element. Each element is computed by the underlying monad.

Since: 0.4.8

## Bounded streams

replicate :: Monad m => Integer -> a -> Enumerator a m bSource

replicateM :: Monad m => Integer -> m a -> Enumerator a m bSource

enumerates a stream of `replicateM`

n m_x*n* elements, with each
element computed by *m_x*.

Since: 0.4.8

generateM :: Monad m => m (Maybe a) -> Enumerator a m bSource

unfold :: Monad m => (s -> Maybe (a, s)) -> s -> Enumerator a m bSource

Enumerates a stream of elements by repeatedly applying a function to some state.

Similar to `iterate`

.

Since: 0.4.8

unfoldM :: Monad m => (s -> m (Maybe (a, s))) -> s -> Enumerator a m bSource

Enumerates a stream of elements by repeatedly applying a computation to some state.

Similar to `iterateM`

.

Since: 0.4.8

## Dropping input

drop :: Monad m => Integer -> Iteratee a m ()Source

ignores `drop`

n*n* input elements from the stream.

Since: 0.4.5

dropWhile :: Monad m => (a -> Bool) -> Iteratee a m ()Source

ignores input from the stream
until the first element which does not match the predicate.
`dropWhile`

p

Since: 0.4.5

filter :: Monad m => (a -> Bool) -> Enumeratee a a m bSource

Applies a predicate to the stream. The inner iteratee only receives
elements for which the predicate is `True`

.

Since: 0.4.8

filterM :: Monad m => (a -> m Bool) -> Enumeratee a a m bSource

Applies a monadic predicate to the stream. The inner iteratee only
receives elements for which the predicate returns `True`

.

Since: 0.4.8

unique :: (Ord a, Monad m) => Enumeratee a a m bSource

Remove duplicate elements from a stream, passing through the first instance of each value.

Similar to `nub`

, but more efficient because it uses a `Set`

internally.

Since: 0.4.11

## Consumers

head :: Monad m => Iteratee a m (Maybe a)Source

Get the next element from the stream, or `Nothing`

if the stream has
ended.

Since: 0.4.5

head_ :: Monad m => Iteratee a m aSource

Get the next element from the stream, or raise an error if the stream has ended.

Since: 0.4.14

take :: Monad m => Integer -> Iteratee a m [a]Source

extracts the next `take`

n*n* elements from the
stream, as a list.

Since: 0.4.5

takeWhile :: Monad m => (a -> Bool) -> Iteratee a m [a]Source

extracts input from the stream until the first element
which does not match the predicate.
`takeWhile`

p

Since: 0.4.5

## Zipping

zip :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m (b1, b2)Source

Pass input from a stream through two iteratees at once. Excess input is yielded if it was not consumed by either iteratee.

Analogous to `zip`

.

Since: 0.4.14

zip3 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m (b1, b2, b3)Source

Pass input from a stream through three iteratees at once. Excess input is yielded if it was not consumed by any iteratee.

Analogous to `zip3`

.

Since: 0.4.14

zip4 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m (b1, b2, b3, b4)Source

Pass input from a stream through four iteratees at once. Excess input is yielded if it was not consumed by any iteratee.

Analogous to `zip4`

.

Since: 0.4.14

zip5 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m (b1, b2, b3, b4, b5)Source

Pass input from a stream through five iteratees at once. Excess input is yielded if it was not consumed by any iteratee.

Analogous to `zip5`

.

Since: 0.4.14

zip6 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m (b1, b2, b3, b4, b5, b6)Source

Pass input from a stream through six iteratees at once. Excess input is yielded if it was not consumed by any iteratee.

Analogous to `zip6`

.

Since: 0.4.14

zip7 :: Monad m => Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m b7 -> Iteratee a m (b1, b2, b3, b4, b5, b6, b7)Source

Pass input from a stream through seven iteratees at once. Excess input is yielded if it was not consumed by any iteratee.

Analogous to `zip7`

.

Since: 0.4.14

zipWith :: Monad m => (b1 -> b2 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m cSource

Pass input from a stream through two iteratees at once. Excess input is yielded if it was not consumed by either iteratee. Output from the iteratees is combined with a user-provided function.

Analogous to `zipWith`

.

Since: 0.4.14

zipWith3 :: Monad m => (b1 -> b2 -> b3 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m cSource

Pass input from a stream through two iteratees at once. Excess input is yielded if it was not consumed by either iteratee. Output from the iteratees is combined with a user-provided function.

Analogous to `zipWith3`

.

Since: 0.4.14

zipWith4 :: Monad m => (b1 -> b2 -> b3 -> b4 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m cSource

Pass input from a stream through two iteratees at once. Excess input is yielded if it was not consumed by either iteratee. Output from the iteratees is combined with a user-provided function.

Analogous to `zipWith4`

.

Since: 0.4.14

zipWith5 :: Monad m => (b1 -> b2 -> b3 -> b4 -> b5 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m cSource

Analogous to `zipWith5`

.

Since: 0.4.14

zipWith6 :: Monad m => (b1 -> b2 -> b3 -> b4 -> b5 -> b6 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m cSource

Analogous to `zipWith6`

.

Since: 0.4.14

zipWith7 :: Monad m => (b1 -> b2 -> b3 -> b4 -> b5 -> b6 -> b7 -> c) -> Iteratee a m b1 -> Iteratee a m b2 -> Iteratee a m b3 -> Iteratee a m b4 -> Iteratee a m b5 -> Iteratee a m b6 -> Iteratee a m b7 -> Iteratee a m cSource

Analogous to `zipWith7`

.

Since: 0.4.14

## Unsorted

require :: Monad m => Integer -> Iteratee a m ()Source

buffers input until at least `require`

n*n* elements are available, or
throws an error if the stream ends early.

Since: 0.4.5

isolate :: Monad m => Integer -> Enumeratee a a m bSource

reads at most `isolate`

n*n* elements from the stream, and passes them
to its iteratee. If the iteratee finishes early, elements continue to be
consumed from the outer stream until *n* have been consumed.

Since: 0.4.5

isolateWhile :: Monad m => (a -> Bool) -> Enumeratee a a m bSource

reads elements from the stream until `isolateWhile`

p*p* is false, and
passes them to its iteratee. If the iteratee finishes early, elements
continue to be consumed from the outer stream until *p* is false.

Since: 0.4.16

splitWhen :: Monad m => (a -> Bool) -> Enumeratee a [a] m bSource

Split on elements satisfying a given predicate.

Since: 0.4.8