Safe Haskell	Trustworthy
Language	Haskell2010

Pipes

Contents

The Proxy Monad Transformer
ListT
Utilities
Re-exports

Description

This module is the recommended entry point to the pipes library.

Read Pipes.Tutorial if you want a tutorial explaining how to use this library.

Synopsis

The Proxy Monad Transformer

data Proxy a' a b' b m r Source #

A Proxy is a monad transformer that receives and sends information on both an upstream and downstream interface.

The type variables signify:

a' and a - The upstream interface, where (a')s go out and (a)s come in
b' and b - The downstream interface, where (b)s go out and (b')s come in
m - The base monad
r - The return value

Instances

MonadError e m => MonadError e (Proxy a' a b' b m) Source #
Methods throwError :: e -> Proxy a' a b' b m a # catchError :: Proxy a' a b' b m a -> (e -> Proxy a' a b' b m a) -> Proxy a' a b' b m a #
MonadReader r m => MonadReader r (Proxy a' a b' b m) Source #
Methods ask :: Proxy a' a b' b m r # local :: (r -> r) -> Proxy a' a b' b m a -> Proxy a' a b' b m a # reader :: (r -> a) -> Proxy a' a b' b m a #
MonadState s m => MonadState s (Proxy a' a b' b m) Source #
Methods get :: Proxy a' a b' b m s # put :: s -> Proxy a' a b' b m () # state :: (s -> (a, s)) -> Proxy a' a b' b m a #
MonadWriter w m => MonadWriter w (Proxy a' a b' b m) Source #
Methods writer :: (a, w) -> Proxy a' a b' b m a # tell :: w -> Proxy a' a b' b m () # listen :: Proxy a' a b' b m a -> Proxy a' a b' b m (a, w) # pass :: Proxy a' a b' b m (a, w -> w) -> Proxy a' a b' b m a #
MFunctor (Proxy a' a b' b) Source #
Methods hoist :: Monad m => (forall c. m c -> n c) -> Proxy a' a b' b m b -> Proxy a' a b' b n b #
MMonad (Proxy a' a b' b) Source #
Methods embed :: Monad n => (forall c. m c -> Proxy a' a b' b n c) -> Proxy a' a b' b m b -> Proxy a' a b' b n b #
MonadTrans (Proxy a' a b' b) Source #
Methods lift :: Monad m => m a -> Proxy a' a b' b m a #
Monad m => Monad (Proxy a' a b' b m) Source #
Methods (>>=) :: Proxy a' a b' b m a -> (a -> Proxy a' a b' b m b) -> Proxy a' a b' b m b # (>>) :: Proxy a' a b' b m a -> Proxy a' a b' b m b -> Proxy a' a b' b m b # return :: a -> Proxy a' a b' b m a # fail :: String -> Proxy a' a b' b m a #
Monad m => Functor (Proxy a' a b' b m) Source #
Methods fmap :: (a -> b) -> Proxy a' a b' b m a -> Proxy a' a b' b m b # (<$) :: a -> Proxy a' a b' b m b -> Proxy a' a b' b m a #
Monad m => Applicative (Proxy a' a b' b m) Source #
Methods pure :: a -> Proxy a' a b' b m a # (<>) :: Proxy a' a b' b m (a -> b) -> Proxy a' a b' b m a -> Proxy a' a b' b m b # (>) :: Proxy a' a b' b m a -> Proxy a' a b' b m b -> Proxy a' a b' b m b # (<*) :: Proxy a' a b' b m a -> Proxy a' a b' b m b -> Proxy a' a b' b m a #
MonadIO m => MonadIO (Proxy a' a b' b m) Source #
Methods liftIO :: IO a -> Proxy a' a b' b m a #
MonadPlus m => Alternative (Proxy a' a b' b m) Source #
Methods empty :: Proxy a' a b' b m a # (<\|>) :: Proxy a' a b' b m a -> Proxy a' a b' b m a -> Proxy a' a b' b m a # some :: Proxy a' a b' b m a -> Proxy a' a b' b m [a] # many :: Proxy a' a b' b m a -> Proxy a' a b' b m [a] #
MonadPlus m => MonadPlus (Proxy a' a b' b m) Source #
Methods mzero :: Proxy a' a b' b m a # mplus :: Proxy a' a b' b m a -> Proxy a' a b' b m a -> Proxy a' a b' b m a #
(Monad m, Monoid r) => Monoid (Proxy a' a b' b m r) Source #
Methods mempty :: Proxy a' a b' b m r # mappend :: Proxy a' a b' b m r -> Proxy a' a b' b m r -> Proxy a' a b' b m r # mconcat :: [Proxy a' a b' b m r] -> Proxy a' a b' b m r #

data X Source #

The empty type, used to close output ends

When Data.Void is merged into base, this will change to:

type X = Void

type Effect = Proxy X () () X Source #

An effect in the base monad

Effects neither await nor yield

type Effect' m r = forall x' x y' y. Proxy x' x y' y m r Source #

Like Effect, but with a polymorphic type

runEffect :: Monad m => Effect m r -> m r Source #

Run a self-contained Effect, converting it back to the base monad

Producers

Use yield to produce output and (~>) / for to substitute yields.

yield and (~>) obey the Category laws:

-- Substituting 'yield' with 'f' gives 'f'
yield ~> f = f

-- Substituting every 'yield' with another 'yield' does nothing
f ~> yield = f

-- 'yield' substitution is associative
(f ~> g) ~> h = f ~> (g ~> h)

These are equivalent to the following "for loop laws":

-- Looping over a single yield simplifies to function application
for (yield x) f = f x

-- Re-yielding every element of a stream returns the original stream
for s yield = s

-- Nested for loops can become a sequential for loops if the inner loop
-- body ignores the outer loop variable
for s (\a -> for (f a) g) = for (for s f) g = for s (f ~> g)

type Producer b = Proxy X () () b Source #

Producers can only yield

type Producer' b m r = forall x' x. Proxy x' x () b m r Source #

Like Producer, but with a polymorphic type

yield :: Monad m => a -> Producer' a m () Source #

Produce a value

yield :: Monad m => a -> Pipe x a m ()

for Source #

Arguments

:: Monad m
=> Proxy x' x b' b m a'
-> (b -> Proxy x' x c' c m b')
-> Proxy x' x c' c m a'

(for p body) loops over p replacing each yield with body.

for :: Monad m => Producer b m r -> (b -> Effect       m ()) -> Effect       m r
for :: Monad m => Producer b m r -> (b -> Producer   c m ()) -> Producer   c m r
for :: Monad m => Pipe   x b m r -> (b -> Consumer x   m ()) -> Consumer x   m r
for :: Monad m => Pipe   x b m r -> (b -> Pipe     x c m ()) -> Pipe     x c m r

The following diagrams show the flow of information:

                              .--->   b
                             /        |
   +-----------+            /   +-----|-----+                 +---------------+
   |           |           /    |     v     |                 |               |
   |           |          /     |           |                 |               |
x ==>    p    ==> b   ---'   x ==>   body  ==> c     =     x ==> for p body  ==> c
   |           |                |           |                 |               |
   |     |     |                |     |     |                 |       |       |
   +-----|-----+                +-----|-----+                 +-------|-------+
         v                            v                               v
         r                            ()                              r

For a more complete diagram including bidirectional flow, see Pipes.Core.

(~>) infixr 4 Source #

Arguments

:: Monad m
=> (a -> Proxy x' x b' b m a')
-> (b -> Proxy x' x c' c m b')
-> a -> Proxy x' x c' c m a'

Compose loop bodies

(~>) :: Monad m => (a -> Producer b m r) -> (b -> Effect       m ()) -> (a -> Effect       m r)
(~>) :: Monad m => (a -> Producer b m r) -> (b -> Producer   c m ()) -> (a -> Producer   c m r)
(~>) :: Monad m => (a -> Pipe   x b m r) -> (b -> Consumer x   m ()) -> (a -> Consumer x   m r)
(~>) :: Monad m => (a -> Pipe   x b m r) -> (b -> Pipe     x c m ()) -> (a -> Pipe     x c m r)

The following diagrams show the flow of information:

         a                    .--->   b                              a
         |                   /        |                              |
   +-----|-----+            /   +-----|-----+                 +------|------+
   |     v     |           /    |     v     |                 |      v      |
   |           |          /     |           |                 |             |
x ==>    f    ==> b   ---'   x ==>    g    ==> c     =     x ==>   f ~> g  ==> c
   |           |                |           |                 |             |
   |     |     |                |     |     |                 |      |      |
   +-----|-----+                +-----|-----+                 +------|------+
         v                            v                              v
         r                            ()                             r

For a more complete diagram including bidirectional flow, see Pipes.Core.

(<~) infixl 4 Source #

Arguments

:: Monad m
=> (b -> Proxy x' x c' c m b')
-> (a -> Proxy x' x b' b m a')
-> a -> Proxy x' x c' c m a'

(~>) with the arguments flipped

Consumers

Use await to request input and (>~) to substitute awaits.

await and (>~) obey the Category laws:

-- Substituting every 'await' with another 'await' does nothing
await >~ f = f

-- Substituting 'await' with 'f' gives 'f'
f >~ await = f

-- 'await' substitution is associative
(f >~ g) >~ h = f >~ (g >~ h)

type Consumer a = Proxy () a () X Source #

Consumers can only await

type Consumer' a m r = forall y' y. Proxy () a y' y m r Source #

Like Consumer, but with a polymorphic type

await :: Monad m => Consumer' a m a Source #

Consume a value

await :: Monad m => Pipe a y m a

(>~) infixr 5 Source #

Arguments

:: Monad m
=> Proxy a' a y' y m b
-> Proxy () b y' y m c
-> Proxy a' a y' y m c

(draw >~ p) loops over p replacing each await with draw

(>~) :: Monad m => Effect       m b -> Consumer b   m c -> Effect       m c
(>~) :: Monad m => Consumer a   m b -> Consumer b   m c -> Consumer a   m c
(>~) :: Monad m => Producer   y m b -> Pipe     b y m c -> Producer   y m c
(>~) :: Monad m => Pipe     a y m b -> Pipe     b y m c -> Pipe     a y m c

The following diagrams show the flow of information:

   +-----------+                 +-----------+                 +-------------+
   |           |                 |           |                 |             |
   |           |                 |           |                 |             |
a ==>    f    ==> y   .--->   b ==>    g    ==> y     =     a ==>   f >~ g  ==> y
   |           |     /           |           |                 |             |
   |     |     |    /            |     |     |                 |      |      |
   +-----|-----+   /             +-----|-----+                 +------|------+
         v        /                    v                              v
         b   ----'                     c                              c

For a more complete diagram including bidirectional flow, see Pipes.Core.

(~<) infixl 5 Source #

Arguments

:: Monad m
=> Proxy () b y' y m c
-> Proxy a' a y' y m b
-> Proxy a' a y' y m c

(>~) with the arguments flipped

Pipes

Use await and yield to build Pipes and (>->) to connect Pipes.

cat and (>->) obey the Category laws:

-- Useless use of cat
cat >-> f = f

-- Redirecting output to cat does nothing
f >-> cat = f

-- The pipe operator is associative
(f >-> g) >-> h = f >-> (g >-> h)

type Pipe a b = Proxy () a () b Source #

Pipes can both await and yield

cat :: Monad m => Pipe a a m r Source #

The identity Pipe, analogous to the Unix cat program

(>->) infixl 7 Source #

Arguments

:: Monad m
=> Proxy a' a () b m r
-> Proxy () b c' c m r
-> Proxy a' a c' c m r

Pipe composition, analogous to the Unix pipe operator

(>->) :: Monad m => Producer b m r -> Consumer b   m r -> Effect       m r
(>->) :: Monad m => Producer b m r -> Pipe     b c m r -> Producer   c m r
(>->) :: Monad m => Pipe   a b m r -> Consumer b   m r -> Consumer a   m r
(>->) :: Monad m => Pipe   a b m r -> Pipe     b c m r -> Pipe     a c m r

The following diagrams show the flow of information:

   +-----------+     +-----------+                 +-------------+
   |           |     |           |                 |             |
   |           |     |           |                 |             |
a ==>    f    ==> b ==>    g    ==> c     =     a ==>  f >-> g  ==> c
   |           |     |           |                 |             |
   |     |     |     |     |     |                 |      |      |
   +-----|-----+     +-----|-----+                 +------|------+
         v                 v                              v
         r                 r                              r

For a more complete diagram including bidirectional flow, see Pipes.Core.

(<-<) infixr 7 Source #

Arguments

:: Monad m
=> Proxy () b c' c m r
-> Proxy a' a () b m r
-> Proxy a' a c' c m r

(>->) with the arguments flipped

ListT

newtype ListT m a Source #

The list monad transformer, which extends a monad with non-determinism

return corresponds to yield, yielding a single value

(>>=) corresponds to for, calling the second computation once for each time the first computation yields.

Constructors

Select
Fields enumerate :: Producer a m ()

Instances

MFunctor ListT Source #
Methods hoist :: Monad m => (forall a. m a -> n a) -> ListT m b -> ListT n b #
MonadTrans ListT Source #
Methods lift :: Monad m => m a -> ListT m a #
Enumerable ListT Source #
Methods toListT :: Monad m => ListT m a -> ListT m a Source #
MonadError e m => MonadError e (ListT m) Source #
Methods throwError :: e -> ListT m a # catchError :: ListT m a -> (e -> ListT m a) -> ListT m a #
MonadReader i m => MonadReader i (ListT m) Source #
Methods ask :: ListT m i # local :: (i -> i) -> ListT m a -> ListT m a # reader :: (i -> a) -> ListT m a #
MonadState s m => MonadState s (ListT m) Source #
Methods get :: ListT m s # put :: s -> ListT m () # state :: (s -> (a, s)) -> ListT m a #
MonadWriter w m => MonadWriter w (ListT m) Source #
Methods writer :: (a, w) -> ListT m a # tell :: w -> ListT m () # listen :: ListT m a -> ListT m (a, w) # pass :: ListT m (a, w -> w) -> ListT m a #
Monad m => Monad (ListT m) Source #
Methods (>>=) :: ListT m a -> (a -> ListT m b) -> ListT m b # (>>) :: ListT m a -> ListT m b -> ListT m b # return :: a -> ListT m a # fail :: String -> ListT m a #
Monad m => Functor (ListT m) Source #
Methods fmap :: (a -> b) -> ListT m a -> ListT m b # (<$) :: a -> ListT m b -> ListT m a #
Monad m => Applicative (ListT m) Source #
Methods pure :: a -> ListT m a # (<>) :: ListT m (a -> b) -> ListT m a -> ListT m b # (>) :: ListT m a -> ListT m b -> ListT m b # (<*) :: ListT m a -> ListT m b -> ListT m a #
Foldable m => Foldable (ListT m) Source #
Methods fold :: Monoid m => ListT m m -> m # foldMap :: Monoid m => (a -> m) -> ListT m a -> m # foldr :: (a -> b -> b) -> b -> ListT m a -> b # foldr' :: (a -> b -> b) -> b -> ListT m a -> b # foldl :: (b -> a -> b) -> b -> ListT m a -> b # foldl' :: (b -> a -> b) -> b -> ListT m a -> b # foldr1 :: (a -> a -> a) -> ListT m a -> a # foldl1 :: (a -> a -> a) -> ListT m a -> a # toList :: ListT m a -> [a] # null :: ListT m a -> Bool # length :: ListT m a -> Int # elem :: Eq a => a -> ListT m a -> Bool # maximum :: Ord a => ListT m a -> a # minimum :: Ord a => ListT m a -> a # sum :: Num a => ListT m a -> a # product :: Num a => ListT m a -> a #
MonadIO m => MonadIO (ListT m) Source #
Methods liftIO :: IO a -> ListT m a #
Monad m => Alternative (ListT m) Source #
Methods empty :: ListT m a # (<\|>) :: ListT m a -> ListT m a -> ListT m a # some :: ListT m a -> ListT m [a] # many :: ListT m a -> ListT m [a] #
Monad m => MonadPlus (ListT m) Source #
Methods mzero :: ListT m a # mplus :: ListT m a -> ListT m a -> ListT m a #
Monad m => Monoid (ListT m a) Source #
Methods mempty :: ListT m a # mappend :: ListT m a -> ListT m a -> ListT m a # mconcat :: [ListT m a] -> ListT m a #

runListT :: Monad m => ListT m a -> m () Source #

Run a self-contained ListT computation

class Enumerable t where Source #

Enumerable generalizes Foldable, converting effectful containers to ListTs.

Instances of Enumerable must satisfy these two laws:

toListT (return r) = return r

toListT $ do x <- m  =  do x <- toListT m
             f x           toListT (f x)

In other words, toListT is monad morphism.

Minimal complete definition

toListT

Methods

toListT :: Monad m => t m a -> ListT m a Source #

Instances

Enumerable MaybeT Source #
Methods toListT :: Monad m => MaybeT m a -> ListT m a Source #
Enumerable ListT Source #
Methods toListT :: Monad m => ListT m a -> ListT m a Source #
Enumerable (ExceptT e) Source #
Methods toListT :: Monad m => ExceptT e m a -> ListT m a Source #
Enumerable (IdentityT *) Source #
Methods toListT :: Monad m => IdentityT * m a -> ListT m a Source #

Utilities

next :: Monad m => Producer a m r -> m (Either r (a, Producer a m r)) Source #

Consume the first value from a Producer

next either fails with a Left if the Producer terminates or succeeds with a Right providing the next value and the remainder of the Producer.

each :: (Monad m, Foldable f) => f a -> Producer' a m () Source #

Convert a Foldable to a Producer

every :: (Monad m, Enumerable t) => t m a -> Producer' a m () Source #

Convert an Enumerable to a Producer

discard :: Monad m => a -> m () Source #

Discards a value

Re-exports

Control.Monad re-exports void

Control.Monad.IO.Class re-exports MonadIO.

Control.Monad.Trans.Class re-exports MonadTrans.

Control.Monad.Morph re-exports MFunctor.

Data.Foldable re-exports Foldable (the class name only).

module Control.Monad

module Control.Monad.IO.Class

module Control.Monad.Trans.Class

module Control.Monad.Morph

class Foldable t #

Data structures that can be folded.

For example, given a data type

data Tree a = Empty | Leaf a | Node (Tree a) a (Tree a)

a suitable instance would be

instance Foldable Tree where
   foldMap f Empty = mempty
   foldMap f (Leaf x) = f x
   foldMap f (Node l k r) = foldMap f l `mappend` f k `mappend` foldMap f r

This is suitable even for abstract types, as the monoid is assumed to satisfy the monoid laws. Alternatively, one could define foldr:

instance Foldable Tree where
   foldr f z Empty = z
   foldr f z (Leaf x) = f x z
   foldr f z (Node l k r) = foldr f (f k (foldr f z r)) l

Foldable instances are expected to satisfy the following laws:

foldr f z t = appEndo (foldMap (Endo . f) t ) z

foldl f z t = appEndo (getDual (foldMap (Dual . Endo . flip f) t)) z

fold = foldMap id

sum, product, maximum, and minimum should all be essentially equivalent to foldMap forms, such as

sum = getSum . foldMap Sum

but may be less defined.

If the type is also a Functor instance, it should satisfy

foldMap f = fold . fmap f

which implies that

foldMap f . fmap g = foldMap (f . g)

Minimal complete definition

foldMap | foldr

Instances

Foldable []
Methods fold :: Monoid m => [m] -> m # foldMap :: Monoid m => (a -> m) -> [a] -> m # foldr :: (a -> b -> b) -> b -> [a] -> b # foldr' :: (a -> b -> b) -> b -> [a] -> b # foldl :: (b -> a -> b) -> b -> [a] -> b # foldl' :: (b -> a -> b) -> b -> [a] -> b # foldr1 :: (a -> a -> a) -> [a] -> a # foldl1 :: (a -> a -> a) -> [a] -> a # toList :: [a] -> [a] # null :: [a] -> Bool # length :: [a] -> Int # elem :: Eq a => a -> [a] -> Bool # maximum :: Ord a => [a] -> a # minimum :: Ord a => [a] -> a # sum :: Num a => [a] -> a # product :: Num a => [a] -> a #
Foldable Maybe
Methods fold :: Monoid m => Maybe m -> m # foldMap :: Monoid m => (a -> m) -> Maybe a -> m # foldr :: (a -> b -> b) -> b -> Maybe a -> b # foldr' :: (a -> b -> b) -> b -> Maybe a -> b # foldl :: (b -> a -> b) -> b -> Maybe a -> b # foldl' :: (b -> a -> b) -> b -> Maybe a -> b # foldr1 :: (a -> a -> a) -> Maybe a -> a # foldl1 :: (a -> a -> a) -> Maybe a -> a # toList :: Maybe a -> [a] # null :: Maybe a -> Bool # length :: Maybe a -> Int # elem :: Eq a => a -> Maybe a -> Bool # maximum :: Ord a => Maybe a -> a # minimum :: Ord a => Maybe a -> a # sum :: Num a => Maybe a -> a # product :: Num a => Maybe a -> a #
Foldable V1
Methods fold :: Monoid m => V1 m -> m # foldMap :: Monoid m => (a -> m) -> V1 a -> m # foldr :: (a -> b -> b) -> b -> V1 a -> b # foldr' :: (a -> b -> b) -> b -> V1 a -> b # foldl :: (b -> a -> b) -> b -> V1 a -> b # foldl' :: (b -> a -> b) -> b -> V1 a -> b # foldr1 :: (a -> a -> a) -> V1 a -> a # foldl1 :: (a -> a -> a) -> V1 a -> a # toList :: V1 a -> [a] # null :: V1 a -> Bool # length :: V1 a -> Int # elem :: Eq a => a -> V1 a -> Bool # maximum :: Ord a => V1 a -> a # minimum :: Ord a => V1 a -> a # sum :: Num a => V1 a -> a # product :: Num a => V1 a -> a #
Foldable U1
Methods fold :: Monoid m => U1 m -> m # foldMap :: Monoid m => (a -> m) -> U1 a -> m # foldr :: (a -> b -> b) -> b -> U1 a -> b # foldr' :: (a -> b -> b) -> b -> U1 a -> b # foldl :: (b -> a -> b) -> b -> U1 a -> b # foldl' :: (b -> a -> b) -> b -> U1 a -> b # foldr1 :: (a -> a -> a) -> U1 a -> a # foldl1 :: (a -> a -> a) -> U1 a -> a # toList :: U1 a -> [a] # null :: U1 a -> Bool # length :: U1 a -> Int # elem :: Eq a => a -> U1 a -> Bool # maximum :: Ord a => U1 a -> a # minimum :: Ord a => U1 a -> a # sum :: Num a => U1 a -> a # product :: Num a => U1 a -> a #
Foldable Par1
Methods fold :: Monoid m => Par1 m -> m # foldMap :: Monoid m => (a -> m) -> Par1 a -> m # foldr :: (a -> b -> b) -> b -> Par1 a -> b # foldr' :: (a -> b -> b) -> b -> Par1 a -> b # foldl :: (b -> a -> b) -> b -> Par1 a -> b # foldl' :: (b -> a -> b) -> b -> Par1 a -> b # foldr1 :: (a -> a -> a) -> Par1 a -> a # foldl1 :: (a -> a -> a) -> Par1 a -> a # toList :: Par1 a -> [a] # null :: Par1 a -> Bool # length :: Par1 a -> Int # elem :: Eq a => a -> Par1 a -> Bool # maximum :: Ord a => Par1 a -> a # minimum :: Ord a => Par1 a -> a # sum :: Num a => Par1 a -> a # product :: Num a => Par1 a -> a #
Foldable Identity
Methods fold :: Monoid m => Identity m -> m # foldMap :: Monoid m => (a -> m) -> Identity a -> m # foldr :: (a -> b -> b) -> b -> Identity a -> b # foldr' :: (a -> b -> b) -> b -> Identity a -> b # foldl :: (b -> a -> b) -> b -> Identity a -> b # foldl' :: (b -> a -> b) -> b -> Identity a -> b # foldr1 :: (a -> a -> a) -> Identity a -> a # foldl1 :: (a -> a -> a) -> Identity a -> a # toList :: Identity a -> [a] # null :: Identity a -> Bool # length :: Identity a -> Int # elem :: Eq a => a -> Identity a -> Bool # maximum :: Ord a => Identity a -> a # minimum :: Ord a => Identity a -> a # sum :: Num a => Identity a -> a # product :: Num a => Identity a -> a #
Foldable ZipList
Methods fold :: Monoid m => ZipList m -> m # foldMap :: Monoid m => (a -> m) -> ZipList a -> m # foldr :: (a -> b -> b) -> b -> ZipList a -> b # foldr' :: (a -> b -> b) -> b -> ZipList a -> b # foldl :: (b -> a -> b) -> b -> ZipList a -> b # foldl' :: (b -> a -> b) -> b -> ZipList a -> b # foldr1 :: (a -> a -> a) -> ZipList a -> a # foldl1 :: (a -> a -> a) -> ZipList a -> a # toList :: ZipList a -> [a] # null :: ZipList a -> Bool # length :: ZipList a -> Int # elem :: Eq a => a -> ZipList a -> Bool # maximum :: Ord a => ZipList a -> a # minimum :: Ord a => ZipList a -> a # sum :: Num a => ZipList a -> a # product :: Num a => ZipList a -> a #
Foldable Dual
Methods fold :: Monoid m => Dual m -> m # foldMap :: Monoid m => (a -> m) -> Dual a -> m # foldr :: (a -> b -> b) -> b -> Dual a -> b # foldr' :: (a -> b -> b) -> b -> Dual a -> b # foldl :: (b -> a -> b) -> b -> Dual a -> b # foldl' :: (b -> a -> b) -> b -> Dual a -> b # foldr1 :: (a -> a -> a) -> Dual a -> a # foldl1 :: (a -> a -> a) -> Dual a -> a # toList :: Dual a -> [a] # null :: Dual a -> Bool # length :: Dual a -> Int # elem :: Eq a => a -> Dual a -> Bool # maximum :: Ord a => Dual a -> a # minimum :: Ord a => Dual a -> a # sum :: Num a => Dual a -> a # product :: Num a => Dual a -> a #
Foldable Sum
Methods fold :: Monoid m => Sum m -> m # foldMap :: Monoid m => (a -> m) -> Sum a -> m # foldr :: (a -> b -> b) -> b -> Sum a -> b # foldr' :: (a -> b -> b) -> b -> Sum a -> b # foldl :: (b -> a -> b) -> b -> Sum a -> b # foldl' :: (b -> a -> b) -> b -> Sum a -> b # foldr1 :: (a -> a -> a) -> Sum a -> a # foldl1 :: (a -> a -> a) -> Sum a -> a # toList :: Sum a -> [a] # null :: Sum a -> Bool # length :: Sum a -> Int # elem :: Eq a => a -> Sum a -> Bool # maximum :: Ord a => Sum a -> a # minimum :: Ord a => Sum a -> a # sum :: Num a => Sum a -> a # product :: Num a => Sum a -> a #
Foldable Product
Methods fold :: Monoid m => Product m -> m # foldMap :: Monoid m => (a -> m) -> Product a -> m # foldr :: (a -> b -> b) -> b -> Product a -> b # foldr' :: (a -> b -> b) -> b -> Product a -> b # foldl :: (b -> a -> b) -> b -> Product a -> b # foldl' :: (b -> a -> b) -> b -> Product a -> b # foldr1 :: (a -> a -> a) -> Product a -> a # foldl1 :: (a -> a -> a) -> Product a -> a # toList :: Product a -> [a] # null :: Product a -> Bool # length :: Product a -> Int # elem :: Eq a => a -> Product a -> Bool # maximum :: Ord a => Product a -> a # minimum :: Ord a => Product a -> a # sum :: Num a => Product a -> a # product :: Num a => Product a -> a #
Foldable First
Methods fold :: Monoid m => First m -> m # foldMap :: Monoid m => (a -> m) -> First a -> m # foldr :: (a -> b -> b) -> b -> First a -> b # foldr' :: (a -> b -> b) -> b -> First a -> b # foldl :: (b -> a -> b) -> b -> First a -> b # foldl' :: (b -> a -> b) -> b -> First a -> b # foldr1 :: (a -> a -> a) -> First a -> a # foldl1 :: (a -> a -> a) -> First a -> a # toList :: First a -> [a] # null :: First a -> Bool # length :: First a -> Int # elem :: Eq a => a -> First a -> Bool # maximum :: Ord a => First a -> a # minimum :: Ord a => First a -> a # sum :: Num a => First a -> a # product :: Num a => First a -> a #
Foldable Last
Methods fold :: Monoid m => Last m -> m # foldMap :: Monoid m => (a -> m) -> Last a -> m # foldr :: (a -> b -> b) -> b -> Last a -> b # foldr' :: (a -> b -> b) -> b -> Last a -> b # foldl :: (b -> a -> b) -> b -> Last a -> b # foldl' :: (b -> a -> b) -> b -> Last a -> b # foldr1 :: (a -> a -> a) -> Last a -> a # foldl1 :: (a -> a -> a) -> Last a -> a # toList :: Last a -> [a] # null :: Last a -> Bool # length :: Last a -> Int # elem :: Eq a => a -> Last a -> Bool # maximum :: Ord a => Last a -> a # minimum :: Ord a => Last a -> a # sum :: Num a => Last a -> a # product :: Num a => Last a -> a #
Foldable (Either a)
Methods fold :: Monoid m => Either a m -> m # foldMap :: Monoid m => (a -> m) -> Either a a -> m # foldr :: (a -> b -> b) -> b -> Either a a -> b # foldr' :: (a -> b -> b) -> b -> Either a a -> b # foldl :: (b -> a -> b) -> b -> Either a a -> b # foldl' :: (b -> a -> b) -> b -> Either a a -> b # foldr1 :: (a -> a -> a) -> Either a a -> a # foldl1 :: (a -> a -> a) -> Either a a -> a # toList :: Either a a -> [a] # null :: Either a a -> Bool # length :: Either a a -> Int # elem :: Eq a => a -> Either a a -> Bool # maximum :: Ord a => Either a a -> a # minimum :: Ord a => Either a a -> a # sum :: Num a => Either a a -> a # product :: Num a => Either a a -> a #
Foldable f => Foldable (Rec1 f)
Methods fold :: Monoid m => Rec1 f m -> m # foldMap :: Monoid m => (a -> m) -> Rec1 f a -> m # foldr :: (a -> b -> b) -> b -> Rec1 f a -> b # foldr' :: (a -> b -> b) -> b -> Rec1 f a -> b # foldl :: (b -> a -> b) -> b -> Rec1 f a -> b # foldl' :: (b -> a -> b) -> b -> Rec1 f a -> b # foldr1 :: (a -> a -> a) -> Rec1 f a -> a # foldl1 :: (a -> a -> a) -> Rec1 f a -> a # toList :: Rec1 f a -> [a] # null :: Rec1 f a -> Bool # length :: Rec1 f a -> Int # elem :: Eq a => a -> Rec1 f a -> Bool # maximum :: Ord a => Rec1 f a -> a # minimum :: Ord a => Rec1 f a -> a # sum :: Num a => Rec1 f a -> a # product :: Num a => Rec1 f a -> a #
Foldable (URec Char)
Methods fold :: Monoid m => URec Char m -> m # foldMap :: Monoid m => (a -> m) -> URec Char a -> m # foldr :: (a -> b -> b) -> b -> URec Char a -> b # foldr' :: (a -> b -> b) -> b -> URec Char a -> b # foldl :: (b -> a -> b) -> b -> URec Char a -> b # foldl' :: (b -> a -> b) -> b -> URec Char a -> b # foldr1 :: (a -> a -> a) -> URec Char a -> a # foldl1 :: (a -> a -> a) -> URec Char a -> a # toList :: URec Char a -> [a] # null :: URec Char a -> Bool # length :: URec Char a -> Int # elem :: Eq a => a -> URec Char a -> Bool # maximum :: Ord a => URec Char a -> a # minimum :: Ord a => URec Char a -> a # sum :: Num a => URec Char a -> a # product :: Num a => URec Char a -> a #
Foldable (URec Double)
Methods fold :: Monoid m => URec Double m -> m # foldMap :: Monoid m => (a -> m) -> URec Double a -> m # foldr :: (a -> b -> b) -> b -> URec Double a -> b # foldr' :: (a -> b -> b) -> b -> URec Double a -> b # foldl :: (b -> a -> b) -> b -> URec Double a -> b # foldl' :: (b -> a -> b) -> b -> URec Double a -> b # foldr1 :: (a -> a -> a) -> URec Double a -> a # foldl1 :: (a -> a -> a) -> URec Double a -> a # toList :: URec Double a -> [a] # null :: URec Double a -> Bool # length :: URec Double a -> Int # elem :: Eq a => a -> URec Double a -> Bool # maximum :: Ord a => URec Double a -> a # minimum :: Ord a => URec Double a -> a # sum :: Num a => URec Double a -> a # product :: Num a => URec Double a -> a #
Foldable (URec Float)
Methods fold :: Monoid m => URec Float m -> m # foldMap :: Monoid m => (a -> m) -> URec Float a -> m # foldr :: (a -> b -> b) -> b -> URec Float a -> b # foldr' :: (a -> b -> b) -> b -> URec Float a -> b # foldl :: (b -> a -> b) -> b -> URec Float a -> b # foldl' :: (b -> a -> b) -> b -> URec Float a -> b # foldr1 :: (a -> a -> a) -> URec Float a -> a # foldl1 :: (a -> a -> a) -> URec Float a -> a # toList :: URec Float a -> [a] # null :: URec Float a -> Bool # length :: URec Float a -> Int # elem :: Eq a => a -> URec Float a -> Bool # maximum :: Ord a => URec Float a -> a # minimum :: Ord a => URec Float a -> a # sum :: Num a => URec Float a -> a # product :: Num a => URec Float a -> a #
Foldable (URec Int)
Methods fold :: Monoid m => URec Int m -> m # foldMap :: Monoid m => (a -> m) -> URec Int a -> m # foldr :: (a -> b -> b) -> b -> URec Int a -> b # foldr' :: (a -> b -> b) -> b -> URec Int a -> b # foldl :: (b -> a -> b) -> b -> URec Int a -> b # foldl' :: (b -> a -> b) -> b -> URec Int a -> b # foldr1 :: (a -> a -> a) -> URec Int a -> a # foldl1 :: (a -> a -> a) -> URec Int a -> a # toList :: URec Int a -> [a] # null :: URec Int a -> Bool # length :: URec Int a -> Int # elem :: Eq a => a -> URec Int a -> Bool # maximum :: Ord a => URec Int a -> a # minimum :: Ord a => URec Int a -> a # sum :: Num a => URec Int a -> a # product :: Num a => URec Int a -> a #
Foldable (URec Word)
Methods fold :: Monoid m => URec Word m -> m # foldMap :: Monoid m => (a -> m) -> URec Word a -> m # foldr :: (a -> b -> b) -> b -> URec Word a -> b # foldr' :: (a -> b -> b) -> b -> URec Word a -> b # foldl :: (b -> a -> b) -> b -> URec Word a -> b # foldl' :: (b -> a -> b) -> b -> URec Word a -> b # foldr1 :: (a -> a -> a) -> URec Word a -> a # foldl1 :: (a -> a -> a) -> URec Word a -> a # toList :: URec Word a -> [a] # null :: URec Word a -> Bool # length :: URec Word a -> Int # elem :: Eq a => a -> URec Word a -> Bool # maximum :: Ord a => URec Word a -> a # minimum :: Ord a => URec Word a -> a # sum :: Num a => URec Word a -> a # product :: Num a => URec Word a -> a #
Foldable (URec (Ptr ()))
Methods fold :: Monoid m => URec (Ptr ()) m -> m # foldMap :: Monoid m => (a -> m) -> URec (Ptr ()) a -> m # foldr :: (a -> b -> b) -> b -> URec (Ptr ()) a -> b # foldr' :: (a -> b -> b) -> b -> URec (Ptr ()) a -> b # foldl :: (b -> a -> b) -> b -> URec (Ptr ()) a -> b # foldl' :: (b -> a -> b) -> b -> URec (Ptr ()) a -> b # foldr1 :: (a -> a -> a) -> URec (Ptr ()) a -> a # foldl1 :: (a -> a -> a) -> URec (Ptr ()) a -> a # toList :: URec (Ptr ()) a -> [a] # null :: URec (Ptr ()) a -> Bool # length :: URec (Ptr ()) a -> Int # elem :: Eq a => a -> URec (Ptr ()) a -> Bool # maximum :: Ord a => URec (Ptr ()) a -> a # minimum :: Ord a => URec (Ptr ()) a -> a # sum :: Num a => URec (Ptr ()) a -> a # product :: Num a => URec (Ptr ()) a -> a #
Foldable ((,) a)
Methods fold :: Monoid m => (a, m) -> m # foldMap :: Monoid m => (a -> m) -> (a, a) -> m # foldr :: (a -> b -> b) -> b -> (a, a) -> b # foldr' :: (a -> b -> b) -> b -> (a, a) -> b # foldl :: (b -> a -> b) -> b -> (a, a) -> b # foldl' :: (b -> a -> b) -> b -> (a, a) -> b # foldr1 :: (a -> a -> a) -> (a, a) -> a # foldl1 :: (a -> a -> a) -> (a, a) -> a # toList :: (a, a) -> [a] # null :: (a, a) -> Bool # length :: (a, a) -> Int # elem :: Eq a => a -> (a, a) -> Bool # maximum :: Ord a => (a, a) -> a # minimum :: Ord a => (a, a) -> a # sum :: Num a => (a, a) -> a # product :: Num a => (a, a) -> a #
Foldable (Array i)
Methods fold :: Monoid m => Array i m -> m # foldMap :: Monoid m => (a -> m) -> Array i a -> m # foldr :: (a -> b -> b) -> b -> Array i a -> b # foldr' :: (a -> b -> b) -> b -> Array i a -> b # foldl :: (b -> a -> b) -> b -> Array i a -> b # foldl' :: (b -> a -> b) -> b -> Array i a -> b # foldr1 :: (a -> a -> a) -> Array i a -> a # foldl1 :: (a -> a -> a) -> Array i a -> a # toList :: Array i a -> [a] # null :: Array i a -> Bool # length :: Array i a -> Int # elem :: Eq a => a -> Array i a -> Bool # maximum :: Ord a => Array i a -> a # minimum :: Ord a => Array i a -> a # sum :: Num a => Array i a -> a # product :: Num a => Array i a -> a #
Foldable (Proxy *)
Methods fold :: Monoid m => Proxy * m -> m # foldMap :: Monoid m => (a -> m) -> Proxy * a -> m # foldr :: (a -> b -> b) -> b -> Proxy * a -> b # foldr' :: (a -> b -> b) -> b -> Proxy * a -> b # foldl :: (b -> a -> b) -> b -> Proxy * a -> b # foldl' :: (b -> a -> b) -> b -> Proxy * a -> b # foldr1 :: (a -> a -> a) -> Proxy * a -> a # foldl1 :: (a -> a -> a) -> Proxy * a -> a # toList :: Proxy * a -> [a] # null :: Proxy * a -> Bool # length :: Proxy * a -> Int # elem :: Eq a => a -> Proxy * a -> Bool # maximum :: Ord a => Proxy * a -> a # minimum :: Ord a => Proxy * a -> a # sum :: Num a => Proxy * a -> a # product :: Num a => Proxy * a -> a #
Foldable f => Foldable (ListT f)
Methods fold :: Monoid m => ListT f m -> m # foldMap :: Monoid m => (a -> m) -> ListT f a -> m # foldr :: (a -> b -> b) -> b -> ListT f a -> b # foldr' :: (a -> b -> b) -> b -> ListT f a -> b # foldl :: (b -> a -> b) -> b -> ListT f a -> b # foldl' :: (b -> a -> b) -> b -> ListT f a -> b # foldr1 :: (a -> a -> a) -> ListT f a -> a # foldl1 :: (a -> a -> a) -> ListT f a -> a # toList :: ListT f a -> [a] # null :: ListT f a -> Bool # length :: ListT f a -> Int # elem :: Eq a => a -> ListT f a -> Bool # maximum :: Ord a => ListT f a -> a # minimum :: Ord a => ListT f a -> a # sum :: Num a => ListT f a -> a # product :: Num a => ListT f a -> a #
Foldable f => Foldable (Lift f)
Methods fold :: Monoid m => Lift f m -> m # foldMap :: Monoid m => (a -> m) -> Lift f a -> m # foldr :: (a -> b -> b) -> b -> Lift f a -> b # foldr' :: (a -> b -> b) -> b -> Lift f a -> b # foldl :: (b -> a -> b) -> b -> Lift f a -> b # foldl' :: (b -> a -> b) -> b -> Lift f a -> b # foldr1 :: (a -> a -> a) -> Lift f a -> a # foldl1 :: (a -> a -> a) -> Lift f a -> a # toList :: Lift f a -> [a] # null :: Lift f a -> Bool # length :: Lift f a -> Int # elem :: Eq a => a -> Lift f a -> Bool # maximum :: Ord a => Lift f a -> a # minimum :: Ord a => Lift f a -> a # sum :: Num a => Lift f a -> a # product :: Num a => Lift f a -> a #
Foldable f => Foldable (MaybeT f)
Methods fold :: Monoid m => MaybeT f m -> m # foldMap :: Monoid m => (a -> m) -> MaybeT f a -> m # foldr :: (a -> b -> b) -> b -> MaybeT f a -> b # foldr' :: (a -> b -> b) -> b -> MaybeT f a -> b # foldl :: (b -> a -> b) -> b -> MaybeT f a -> b # foldl' :: (b -> a -> b) -> b -> MaybeT f a -> b # foldr1 :: (a -> a -> a) -> MaybeT f a -> a # foldl1 :: (a -> a -> a) -> MaybeT f a -> a # toList :: MaybeT f a -> [a] # null :: MaybeT f a -> Bool # length :: MaybeT f a -> Int # elem :: Eq a => a -> MaybeT f a -> Bool # maximum :: Ord a => MaybeT f a -> a # minimum :: Ord a => MaybeT f a -> a # sum :: Num a => MaybeT f a -> a # product :: Num a => MaybeT f a -> a #
Foldable m => Foldable (ListT m) #
Methods fold :: Monoid m => ListT m m -> m # foldMap :: Monoid m => (a -> m) -> ListT m a -> m # foldr :: (a -> b -> b) -> b -> ListT m a -> b # foldr' :: (a -> b -> b) -> b -> ListT m a -> b # foldl :: (b -> a -> b) -> b -> ListT m a -> b # foldl' :: (b -> a -> b) -> b -> ListT m a -> b # foldr1 :: (a -> a -> a) -> ListT m a -> a # foldl1 :: (a -> a -> a) -> ListT m a -> a # toList :: ListT m a -> [a] # null :: ListT m a -> Bool # length :: ListT m a -> Int # elem :: Eq a => a -> ListT m a -> Bool # maximum :: Ord a => ListT m a -> a # minimum :: Ord a => ListT m a -> a # sum :: Num a => ListT m a -> a # product :: Num a => ListT m a -> a #
Foldable (K1 i c)
Methods fold :: Monoid m => K1 i c m -> m # foldMap :: Monoid m => (a -> m) -> K1 i c a -> m # foldr :: (a -> b -> b) -> b -> K1 i c a -> b # foldr' :: (a -> b -> b) -> b -> K1 i c a -> b # foldl :: (b -> a -> b) -> b -> K1 i c a -> b # foldl' :: (b -> a -> b) -> b -> K1 i c a -> b # foldr1 :: (a -> a -> a) -> K1 i c a -> a # foldl1 :: (a -> a -> a) -> K1 i c a -> a # toList :: K1 i c a -> [a] # null :: K1 i c a -> Bool # length :: K1 i c a -> Int # elem :: Eq a => a -> K1 i c a -> Bool # maximum :: Ord a => K1 i c a -> a # minimum :: Ord a => K1 i c a -> a # sum :: Num a => K1 i c a -> a # product :: Num a => K1 i c a -> a #
(Foldable f, Foldable g) => Foldable ((:+:) f g)
Methods fold :: Monoid m => (f :+: g) m -> m # foldMap :: Monoid m => (a -> m) -> (f :+: g) a -> m # foldr :: (a -> b -> b) -> b -> (f :+: g) a -> b # foldr' :: (a -> b -> b) -> b -> (f :+: g) a -> b # foldl :: (b -> a -> b) -> b -> (f :+: g) a -> b # foldl' :: (b -> a -> b) -> b -> (f :+: g) a -> b # foldr1 :: (a -> a -> a) -> (f :+: g) a -> a # foldl1 :: (a -> a -> a) -> (f :+: g) a -> a # toList :: (f :+: g) a -> [a] # null :: (f :+: g) a -> Bool # length :: (f :+: g) a -> Int # elem :: Eq a => a -> (f :+: g) a -> Bool # maximum :: Ord a => (f :+: g) a -> a # minimum :: Ord a => (f :+: g) a -> a # sum :: Num a => (f :+: g) a -> a # product :: Num a => (f :+: g) a -> a #
(Foldable f, Foldable g) => Foldable ((:*:) f g)
Methods fold :: Monoid m => (f :: g) m -> m # foldMap :: Monoid m => (a -> m) -> (f :: g) a -> m # foldr :: (a -> b -> b) -> b -> (f :: g) a -> b # foldr' :: (a -> b -> b) -> b -> (f :: g) a -> b # foldl :: (b -> a -> b) -> b -> (f :: g) a -> b # foldl' :: (b -> a -> b) -> b -> (f :: g) a -> b # foldr1 :: (a -> a -> a) -> (f :: g) a -> a # foldl1 :: (a -> a -> a) -> (f :: g) a -> a # toList :: (f :: g) a -> [a] # null :: (f :: g) a -> Bool # length :: (f :: g) a -> Int # elem :: Eq a => a -> (f :: g) a -> Bool # maximum :: Ord a => (f :: g) a -> a # minimum :: Ord a => (f :: g) a -> a # sum :: Num a => (f :: g) a -> a # product :: Num a => (f :: g) a -> a #
(Foldable f, Foldable g) => Foldable ((:.:) f g)
Methods fold :: Monoid m => (f :.: g) m -> m # foldMap :: Monoid m => (a -> m) -> (f :.: g) a -> m # foldr :: (a -> b -> b) -> b -> (f :.: g) a -> b # foldr' :: (a -> b -> b) -> b -> (f :.: g) a -> b # foldl :: (b -> a -> b) -> b -> (f :.: g) a -> b # foldl' :: (b -> a -> b) -> b -> (f :.: g) a -> b # foldr1 :: (a -> a -> a) -> (f :.: g) a -> a # foldl1 :: (a -> a -> a) -> (f :.: g) a -> a # toList :: (f :.: g) a -> [a] # null :: (f :.: g) a -> Bool # length :: (f :.: g) a -> Int # elem :: Eq a => a -> (f :.: g) a -> Bool # maximum :: Ord a => (f :.: g) a -> a # minimum :: Ord a => (f :.: g) a -> a # sum :: Num a => (f :.: g) a -> a # product :: Num a => (f :.: g) a -> a #
Foldable f => Foldable (ExceptT e f)
Methods fold :: Monoid m => ExceptT e f m -> m # foldMap :: Monoid m => (a -> m) -> ExceptT e f a -> m # foldr :: (a -> b -> b) -> b -> ExceptT e f a -> b # foldr' :: (a -> b -> b) -> b -> ExceptT e f a -> b # foldl :: (b -> a -> b) -> b -> ExceptT e f a -> b # foldl' :: (b -> a -> b) -> b -> ExceptT e f a -> b # foldr1 :: (a -> a -> a) -> ExceptT e f a -> a # foldl1 :: (a -> a -> a) -> ExceptT e f a -> a # toList :: ExceptT e f a -> [a] # null :: ExceptT e f a -> Bool # length :: ExceptT e f a -> Int # elem :: Eq a => a -> ExceptT e f a -> Bool # maximum :: Ord a => ExceptT e f a -> a # minimum :: Ord a => ExceptT e f a -> a # sum :: Num a => ExceptT e f a -> a # product :: Num a => ExceptT e f a -> a #
Foldable f => Foldable (ErrorT e f)
Methods fold :: Monoid m => ErrorT e f m -> m # foldMap :: Monoid m => (a -> m) -> ErrorT e f a -> m # foldr :: (a -> b -> b) -> b -> ErrorT e f a -> b # foldr' :: (a -> b -> b) -> b -> ErrorT e f a -> b # foldl :: (b -> a -> b) -> b -> ErrorT e f a -> b # foldl' :: (b -> a -> b) -> b -> ErrorT e f a -> b # foldr1 :: (a -> a -> a) -> ErrorT e f a -> a # foldl1 :: (a -> a -> a) -> ErrorT e f a -> a # toList :: ErrorT e f a -> [a] # null :: ErrorT e f a -> Bool # length :: ErrorT e f a -> Int # elem :: Eq a => a -> ErrorT e f a -> Bool # maximum :: Ord a => ErrorT e f a -> a # minimum :: Ord a => ErrorT e f a -> a # sum :: Num a => ErrorT e f a -> a # product :: Num a => ErrorT e f a -> a #
Foldable f => Foldable (WriterT w f)
Methods fold :: Monoid m => WriterT w f m -> m # foldMap :: Monoid m => (a -> m) -> WriterT w f a -> m # foldr :: (a -> b -> b) -> b -> WriterT w f a -> b # foldr' :: (a -> b -> b) -> b -> WriterT w f a -> b # foldl :: (b -> a -> b) -> b -> WriterT w f a -> b # foldl' :: (b -> a -> b) -> b -> WriterT w f a -> b # foldr1 :: (a -> a -> a) -> WriterT w f a -> a # foldl1 :: (a -> a -> a) -> WriterT w f a -> a # toList :: WriterT w f a -> [a] # null :: WriterT w f a -> Bool # length :: WriterT w f a -> Int # elem :: Eq a => a -> WriterT w f a -> Bool # maximum :: Ord a => WriterT w f a -> a # minimum :: Ord a => WriterT w f a -> a # sum :: Num a => WriterT w f a -> a # product :: Num a => WriterT w f a -> a #
Foldable f => Foldable (WriterT w f)
Methods fold :: Monoid m => WriterT w f m -> m # foldMap :: Monoid m => (a -> m) -> WriterT w f a -> m # foldr :: (a -> b -> b) -> b -> WriterT w f a -> b # foldr' :: (a -> b -> b) -> b -> WriterT w f a -> b # foldl :: (b -> a -> b) -> b -> WriterT w f a -> b # foldl' :: (b -> a -> b) -> b -> WriterT w f a -> b # foldr1 :: (a -> a -> a) -> WriterT w f a -> a # foldl1 :: (a -> a -> a) -> WriterT w f a -> a # toList :: WriterT w f a -> [a] # null :: WriterT w f a -> Bool # length :: WriterT w f a -> Int # elem :: Eq a => a -> WriterT w f a -> Bool # maximum :: Ord a => WriterT w f a -> a # minimum :: Ord a => WriterT w f a -> a # sum :: Num a => WriterT w f a -> a # product :: Num a => WriterT w f a -> a #
Foldable f => Foldable (Backwards * f)	Derived instance.
Methods fold :: Monoid m => Backwards * f m -> m # foldMap :: Monoid m => (a -> m) -> Backwards * f a -> m # foldr :: (a -> b -> b) -> b -> Backwards * f a -> b # foldr' :: (a -> b -> b) -> b -> Backwards * f a -> b # foldl :: (b -> a -> b) -> b -> Backwards * f a -> b # foldl' :: (b -> a -> b) -> b -> Backwards * f a -> b # foldr1 :: (a -> a -> a) -> Backwards * f a -> a # foldl1 :: (a -> a -> a) -> Backwards * f a -> a # toList :: Backwards * f a -> [a] # null :: Backwards * f a -> Bool # length :: Backwards * f a -> Int # elem :: Eq a => a -> Backwards * f a -> Bool # maximum :: Ord a => Backwards * f a -> a # minimum :: Ord a => Backwards * f a -> a # sum :: Num a => Backwards * f a -> a # product :: Num a => Backwards * f a -> a #
Foldable f => Foldable (IdentityT * f)
Methods fold :: Monoid m => IdentityT * f m -> m # foldMap :: Monoid m => (a -> m) -> IdentityT * f a -> m # foldr :: (a -> b -> b) -> b -> IdentityT * f a -> b # foldr' :: (a -> b -> b) -> b -> IdentityT * f a -> b # foldl :: (b -> a -> b) -> b -> IdentityT * f a -> b # foldl' :: (b -> a -> b) -> b -> IdentityT * f a -> b # foldr1 :: (a -> a -> a) -> IdentityT * f a -> a # foldl1 :: (a -> a -> a) -> IdentityT * f a -> a # toList :: IdentityT * f a -> [a] # null :: IdentityT * f a -> Bool # length :: IdentityT * f a -> Int # elem :: Eq a => a -> IdentityT * f a -> Bool # maximum :: Ord a => IdentityT * f a -> a # minimum :: Ord a => IdentityT * f a -> a # sum :: Num a => IdentityT * f a -> a # product :: Num a => IdentityT * f a -> a #
Foldable f => Foldable (M1 i c f)
Methods fold :: Monoid m => M1 i c f m -> m # foldMap :: Monoid m => (a -> m) -> M1 i c f a -> m # foldr :: (a -> b -> b) -> b -> M1 i c f a -> b # foldr' :: (a -> b -> b) -> b -> M1 i c f a -> b # foldl :: (b -> a -> b) -> b -> M1 i c f a -> b # foldl' :: (b -> a -> b) -> b -> M1 i c f a -> b # foldr1 :: (a -> a -> a) -> M1 i c f a -> a # foldl1 :: (a -> a -> a) -> M1 i c f a -> a # toList :: M1 i c f a -> [a] # null :: M1 i c f a -> Bool # length :: M1 i c f a -> Int # elem :: Eq a => a -> M1 i c f a -> Bool # maximum :: Ord a => M1 i c f a -> a # minimum :: Ord a => M1 i c f a -> a # sum :: Num a => M1 i c f a -> a # product :: Num a => M1 i c f a -> a #
(Foldable f, Foldable g) => Foldable (Product * f g)
Methods fold :: Monoid m => Product * f g m -> m # foldMap :: Monoid m => (a -> m) -> Product * f g a -> m # foldr :: (a -> b -> b) -> b -> Product * f g a -> b # foldr' :: (a -> b -> b) -> b -> Product * f g a -> b # foldl :: (b -> a -> b) -> b -> Product * f g a -> b # foldl' :: (b -> a -> b) -> b -> Product * f g a -> b # foldr1 :: (a -> a -> a) -> Product * f g a -> a # foldl1 :: (a -> a -> a) -> Product * f g a -> a # toList :: Product * f g a -> [a] # null :: Product * f g a -> Bool # length :: Product * f g a -> Int # elem :: Eq a => a -> Product * f g a -> Bool # maximum :: Ord a => Product * f g a -> a # minimum :: Ord a => Product * f g a -> a # sum :: Num a => Product * f g a -> a # product :: Num a => Product * f g a -> a #
(Foldable f, Foldable g) => Foldable (Compose * * f g)
Methods fold :: Monoid m => Compose * * f g m -> m # foldMap :: Monoid m => (a -> m) -> Compose * * f g a -> m # foldr :: (a -> b -> b) -> b -> Compose * * f g a -> b # foldr' :: (a -> b -> b) -> b -> Compose * * f g a -> b # foldl :: (b -> a -> b) -> b -> Compose * * f g a -> b # foldl' :: (b -> a -> b) -> b -> Compose * * f g a -> b # foldr1 :: (a -> a -> a) -> Compose * * f g a -> a # foldl1 :: (a -> a -> a) -> Compose * * f g a -> a # toList :: Compose * * f g a -> [a] # null :: Compose * * f g a -> Bool # length :: Compose * * f g a -> Int # elem :: Eq a => a -> Compose * * f g a -> Bool # maximum :: Ord a => Compose * * f g a -> a # minimum :: Ord a => Compose * * f g a -> a # sum :: Num a => Compose * * f g a -> a # product :: Num a => Compose * * f g a -> a #