lens-5.3.3: Lenses, Folds and Traversals

Copyright | (C) 2012-16 Edward Kmett
License | BSD-style (see the file LICENSE)
Maintainer | Edward Kmett <ekmett@gmail.com>
Stability | experimental
Portability | non-portable
Safe Haskell | Trustworthy
Language | Haskell2010

Control.Lens.Each

Contents

- Each

Description

Synopsis

- class Each s t a b | s -> a, t -> b, s b -> t, t a -> s where
  - each :: Traversal s t a b

# Each

class Each s t a b | s -> a, t -> b, s b -> t, t a -> s where #

Extract `each` element of a (potentially monomorphic) container.

Notably, when applied to a tuple, this generalizes `both` to arbitrary homogeneous tuples.

    >>> (1,2,3) & each *~ 10
    (10,20,30)

It can also be used on monomorphic containers like `Text` or `ByteString`.

    >>> over each Char.toUpper ("hello"^.Text.packed)
    "HELLO"

    >>> ("hello","world") & each.each %~ Char.toUpper
    ("HELLO","WORLD")

Minimal complete definition

Nothing

Methods

each :: Traversal s t a b #

default each :: forall (g :: Type -> Type). (Traversable g, s ~ g a, t ~ g b) => Traversal s t a b #

#### Instances

Instances details

(a ~ Word8, b ~ Word8) => Each ByteString ByteString a b # |
    each :: Traversal ByteString ByteString Word8 Word8
Instance details Defined in Control.Lens.Each Methods each :: Traversal ByteString ByteString a b #
(a ~ Word8, b ~ Word8) => Each ByteString ByteString a b # |
    each :: Traversal ByteString ByteString Word8 Word8
Instance details Defined in Control.Lens.Each Methods each :: Traversal ByteString ByteString a b #
(a ~ Char, b ~ Char) => Each Text Text a b # |
    each :: Traversal Text Text Char Char
Instance details Defined in Control.Lens.Each Methods each :: Traversal Text Text a b #
(a ~ Char, b ~ Char) => Each Text Text a b # |
    each :: Traversal Text Text Char Char
Instance details Defined in Control.Lens.Each Methods each :: Traversal Text Text a b #
Each (Complex a) (Complex b) a b # |
    each :: (RealFloat a, RealFloat b) => Traversal (Complex a) (Complex b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Complex a) (Complex b) a b #
Each (IntMap a) (IntMap b) a b # |
    each :: Traversal (Map c a) (Map c b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (IntMap a) (IntMap b) a b #
Each (Seq a) (Seq b) a b # |
    each :: Traversal (Seq a) (Seq b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Seq a) (Seq b) a b #
Each (Tree a) (Tree b) a b # |
    each :: Traversal (Tree a) (Tree b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Tree a) (Tree b) a b #
Each (NonEmpty a) (NonEmpty b) a b # |
    each :: Traversal (NonEmpty a) (NonEmpty b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (NonEmpty a) (NonEmpty b) a b #
Each (Identity a) (Identity b) a b # |
    each :: Traversal (Identity a) (Identity b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Identity a) (Identity b) a b #
Each (Maybe a) (Maybe b) a b # | Since: 4.20
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Maybe a) (Maybe b) a b #
Each (Vector a) (Vector b) a b # |
    each :: Traversal (Vector a) (Vector b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Vector a) (Vector b) a b #
(Prim a, Prim b) => Each (Vector a) (Vector b) a b # |
    each :: (Prim a, Prim b) => Traversal (Vector a) (Vector b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Vector a) (Vector b) a b #
(Storable a, Storable b) => Each (Vector a) (Vector b) a b # |
    each :: (Storable a, Storable b) => Traversal (Vector a) (Vector b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Vector a) (Vector b) a b #
(Unbox a, Unbox b) => Each (Vector a) (Vector b) a b # |
    each :: (Unbox a, Unbox b) => Traversal (Vector a) (Vector b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Vector a) (Vector b) a b #
Each (Maybe a) (Maybe b) a b # |
    each :: Traversal (Maybe a) (Maybe b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Maybe a) (Maybe b) a b #
Each [a] [b] a b # |
    each :: Traversal [a] [b] a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal [a] [b] a b #
(Ix i, IArray UArray a, IArray UArray b, i ~ j) => Each (UArray i a) (UArray j b) a b # |
    each :: (Ix i, IArray UArray a, IArray UArray b) => Traversal (Array i a) (Array i b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (UArray i a) (UArray j b) a b #
c ~ d => Each (Map c a) (Map d b) a b # |
    each :: Traversal (Map c a) (Map c b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Map c a) (Map d b) a b #
(Ix i, i ~ j) => Each (Array i a) (Array j b) a b # |
    each :: Ix i => Traversal (Array i a) (Array i b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Array i a) (Array j b) a b #
(a ~ a', b ~ b') => Each (Either a a') (Either b b') a b # |
    each :: Traversal (Either a a) (Either b b) a b
Since: 4.18
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Either a a') (Either b b') a b #
(a ~ a', b ~ b') => Each (Either a a') (Either b b') a b # | Since: 4.20
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Either a a') (Either b b') a b #
(a ~ a', b ~ b') => Each (These a a') (These b b') a b # | Since: 4.20
Instance details Defined in Control.Lens.Each Methods each :: Traversal (These a a') (These b b') a b #
(a ~ a', b ~ b') => Each (Pair a a') (Pair b b') a b # | Since: 4.20
Instance details Defined in Control.Lens.Each Methods each :: Traversal (Pair a a') (Pair b b') a b #
(a ~ a', b ~ b') => Each (These a a') (These b b') a b # | Since: 4.20
Instance details Defined in Control.Lens.Each Methods each :: Traversal (These a a') (These b b') a b #
c ~ d => Each (HashMap c a) (HashMap d b) a b # |
    each :: Traversal (HashMap c a) (HashMap c b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (HashMap c a) (HashMap d b) a b #
(a ~ a', b ~ b') => Each (a, a') (b, b') a b # |
    each :: Traversal (a,a) (b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a') (b, b') a b #
(a ~ a2, a ~ a3, b ~ b2, b ~ b3) => Each (a, a2, a3) (b, b2, b3) a b # |
    each :: Traversal (a,a,a) (b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3) (b, b2, b3) a b #
(a ~ a2, a ~ a3, a ~ a4, b ~ b2, b ~ b3, b ~ b4) => Each (a, a2, a3, a4) (b, b2, b3, b4) a b # |
    each :: Traversal (a,a,a,a) (b,b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3, a4) (b, b2, b3, b4) a b #
(a ~ a2, a ~ a3, a ~ a4, a ~ a5, b ~ b2, b ~ b3, b ~ b4, b ~ b5) => Each (a, a2, a3, a4, a5) (b, b2, b3, b4, b5) a b # |
    each :: Traversal (a,a,a,a,a) (b,b,b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3, a4, a5) (b, b2, b3, b4, b5) a b #
(a ~ a2, a ~ a3, a ~ a4, a ~ a5, a ~ a6, b ~ b2, b ~ b3, b ~ b4, b ~ b5, b ~ b6) => Each (a, a2, a3, a4, a5, a6) (b, b2, b3, b4, b5, b6) a b # |
    each :: Traversal (a,a,a,a,a,a) (b,b,b,b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3, a4, a5, a6) (b, b2, b3, b4, b5, b6) a b #
(a ~ a2, a ~ a3, a ~ a4, a ~ a5, a ~ a6, a ~ a7, b ~ b2, b ~ b3, b ~ b4, b ~ b5, b ~ b6, b ~ b7) => Each (a, a2, a3, a4, a5, a6, a7) (b, b2, b3, b4, b5, b6, b7) a b # |
    each :: Traversal (a,a,a,a,a,a,a) (b,b,b,b,b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3, a4, a5, a6, a7) (b, b2, b3, b4, b5, b6, b7) a b #
(a ~ a2, a ~ a3, a ~ a4, a ~ a5, a ~ a6, a ~ a7, a ~ a8, b ~ b2, b ~ b3, b ~ b4, b ~ b5, b ~ b6, b ~ b7, b ~ b8) => Each (a, a2, a3, a4, a5, a6, a7, a8) (b, b2, b3, b4, b5, b6, b7, b8) a b # |
    each :: Traversal (a,a,a,a,a,a,a,a) (b,b,b,b,b,b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3, a4, a5, a6, a7, a8) (b, b2, b3, b4, b5, b6, b7, b8) a b #
(a ~ a2, a ~ a3, a ~ a4, a ~ a5, a ~ a6, a ~ a7, a ~ a8, a ~ a9, b ~ b2, b ~ b3, b ~ b4, b ~ b5, b ~ b6, b ~ b7, b ~ b8, b ~ b9) => Each (a, a2, a3, a4, a5, a6, a7, a8, a9) (b, b2, b3, b4, b5, b6, b7, b8, b9) a b # |
    each :: Traversal (a,a,a,a,a,a,a,a,a) (b,b,b,b,b,b,b,b,b) a b
Instance details Defined in Control.Lens.Each Methods each :: Traversal (a, a2, a3, a4, a5, a6, a7, a8, a9) (b, b2, b3, b4, b5, b6, b7, b8, b9) a b #