Safe Haskell	Safe-Inferred
Language	Haskell2010

Lens.Micro.FieldN

Documentation

class Field1 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_1 :: Lens s t a b Source #

Gives access to the 1st field of a tuple (up to 5-tuples).

Getting the 1st component:

>>> (1,2,3,4,5) ^. _1
1

Setting the 1st component:

>>> (1,2,3) & _1 .~ 10
(10,2,3)

Note that this lens is lazy, and can set fields even of undefined:

>>> set _1 10 undefined :: (Int, Int)
(10,*** Exception: Prelude.undefined

This is done to avoid violating a lens law stating that you can get back what you put:

>>> view _1 . set _1 10 $ (undefined :: (Int, Int))
10

The implementation (for 2-tuples) is:

_1 f t = (,) <$> f    (fst t)
             <*> pure (snd t)

or, alternatively,

_1 f ~(a,b) = (\a' -> (a',b)) <$> f a

(where ~ means a lazy pattern).

_2, _3, _4, and _5 are also available (see below).

Instances

Instances details

Field1 (a, b) (a', b) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b) (a', b) a a' Source #
Field1 (a, b, c) (a', b, c) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c) (a', b, c) a a' Source #
Field1 (a, b, c, d) (a', b, c, d) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c, d) (a', b, c, d) a a' Source #
Field1 (a, b, c, d, e) (a', b, c, d, e) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c, d, e) (a', b, c, d, e) a a' Source #
Field1 (a, b, c, d, e, f) (a', b, c, d, e, f) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c, d, e, f) (a', b, c, d, e, f) a a' Source #
Field1 (a, b, c, d, e, f, g) (a', b, c, d, e, f, g) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c, d, e, f, g) (a', b, c, d, e, f, g) a a' Source #
Field1 (a, b, c, d, e, f, g, h) (a', b, c, d, e, f, g, h) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c, d, e, f, g, h) (a', b, c, d, e, f, g, h) a a' Source #
Field1 (a, b, c, d, e, f, g, h, i) (a', b, c, d, e, f, g, h, i) a a' Source #
Instance details Defined in Lens.Micro.FieldN Methods _1 :: Lens (a, b, c, d, e, f, g, h, i) (a', b, c, d, e, f, g, h, i) a a' Source #

class Field2 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_2 :: Lens s t a b Source #

Instances

Instances details

Field2 (a, b) (a, b') b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b) (a, b') b b' Source #
Field2 (a, b, c) (a, b', c) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c) (a, b', c) b b' Source #
Field2 (a, b, c, d) (a, b', c, d) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c, d) (a, b', c, d) b b' Source #
Field2 (a, b, c, d, e) (a, b', c, d, e) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c, d, e) (a, b', c, d, e) b b' Source #
Field2 (a, b, c, d, e, f) (a, b', c, d, e, f) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c, d, e, f) (a, b', c, d, e, f) b b' Source #
Field2 (a, b, c, d, e, f, g) (a, b', c, d, e, f, g) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c, d, e, f, g) (a, b', c, d, e, f, g) b b' Source #
Field2 (a, b, c, d, e, f, g, h) (a, b', c, d, e, f, g, h) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c, d, e, f, g, h) (a, b', c, d, e, f, g, h) b b' Source #
Field2 (a, b, c, d, e, f, g, h, i) (a, b', c, d, e, f, g, h, i) b b' Source #
Instance details Defined in Lens.Micro.FieldN Methods _2 :: Lens (a, b, c, d, e, f, g, h, i) (a, b', c, d, e, f, g, h, i) b b' Source #

class Field3 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_3 :: Lens s t a b Source #

Instances

Instances details

Field3 (a, b, c) (a, b, c') c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c) (a, b, c') c c' Source #
Field3 (a, b, c, d) (a, b, c', d) c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c, d) (a, b, c', d) c c' Source #
Field3 (a, b, c, d, e) (a, b, c', d, e) c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c, d, e) (a, b, c', d, e) c c' Source #
Field3 (a, b, c, d, e, f) (a, b, c', d, e, f) c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c, d, e, f) (a, b, c', d, e, f) c c' Source #
Field3 (a, b, c, d, e, f, g) (a, b, c', d, e, f, g) c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c, d, e, f, g) (a, b, c', d, e, f, g) c c' Source #
Field3 (a, b, c, d, e, f, g, h) (a, b, c', d, e, f, g, h) c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c, d, e, f, g, h) (a, b, c', d, e, f, g, h) c c' Source #
Field3 (a, b, c, d, e, f, g, h, i) (a, b, c', d, e, f, g, h, i) c c' Source #
Instance details Defined in Lens.Micro.FieldN Methods _3 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c', d, e, f, g, h, i) c c' Source #

class Field4 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_4 :: Lens s t a b Source #

Instances

Instances details

Field4 (a, b, c, d) (a, b, c, d') d d' Source #
Instance details Defined in Lens.Micro.FieldN Methods _4 :: Lens (a, b, c, d) (a, b, c, d') d d' Source #
Field4 (a, b, c, d, e) (a, b, c, d', e) d d' Source #
Instance details Defined in Lens.Micro.FieldN Methods _4 :: Lens (a, b, c, d, e) (a, b, c, d', e) d d' Source #
Field4 (a, b, c, d, e, f) (a, b, c, d', e, f) d d' Source #
Instance details Defined in Lens.Micro.FieldN Methods _4 :: Lens (a, b, c, d, e, f) (a, b, c, d', e, f) d d' Source #
Field4 (a, b, c, d, e, f, g) (a, b, c, d', e, f, g) d d' Source #
Instance details Defined in Lens.Micro.FieldN Methods _4 :: Lens (a, b, c, d, e, f, g) (a, b, c, d', e, f, g) d d' Source #
Field4 (a, b, c, d, e, f, g, h) (a, b, c, d', e, f, g, h) d d' Source #
Instance details Defined in Lens.Micro.FieldN Methods _4 :: Lens (a, b, c, d, e, f, g, h) (a, b, c, d', e, f, g, h) d d' Source #
Field4 (a, b, c, d, e, f, g, h, i) (a, b, c, d', e, f, g, h, i) d d' Source #
Instance details Defined in Lens.Micro.FieldN Methods _4 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c, d', e, f, g, h, i) d d' Source #

class Field5 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_5 :: Lens s t a b Source #

Instances

Instances details

Field5 (a, b, c, d, e) (a, b, c, d, e') e e' Source #
Instance details Defined in Lens.Micro.FieldN Methods _5 :: Lens (a, b, c, d, e) (a, b, c, d, e') e e' Source #
Field5 (a, b, c, d, e, f) (a, b, c, d, e', f) e e' Source #
Instance details Defined in Lens.Micro.FieldN Methods _5 :: Lens (a, b, c, d, e, f) (a, b, c, d, e', f) e e' Source #
Field5 (a, b, c, d, e, f, g) (a, b, c, d, e', f, g) e e' Source #
Instance details Defined in Lens.Micro.FieldN Methods _5 :: Lens (a, b, c, d, e, f, g) (a, b, c, d, e', f, g) e e' Source #
Field5 (a, b, c, d, e, f, g, h) (a, b, c, d, e', f, g, h) e e' Source #
Instance details Defined in Lens.Micro.FieldN Methods _5 :: Lens (a, b, c, d, e, f, g, h) (a, b, c, d, e', f, g, h) e e' Source #
Field5 (a, b, c, d, e, f, g, h, i) (a, b, c, d, e', f, g, h, i) e e' Source #
Instance details Defined in Lens.Micro.FieldN Methods _5 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c, d, e', f, g, h, i) e e' Source #

class Field6 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_6 :: Lens s t a b Source #

Instances

Instances details

Field6 (a, b, c, d, e, f) (a, b, c, d, e, f') f f' Source #
Instance details Defined in Lens.Micro.FieldN Methods _6 :: Lens (a, b, c, d, e, f) (a, b, c, d, e, f') f f' Source #
Field6 (a, b, c, d, e, f, g) (a, b, c, d, e, f', g) f f' Source #
Instance details Defined in Lens.Micro.FieldN Methods _6 :: Lens (a, b, c, d, e, f, g) (a, b, c, d, e, f', g) f f' Source #
Field6 (a, b, c, d, e, f, g, h) (a, b, c, d, e, f', g, h) f f' Source #
Instance details Defined in Lens.Micro.FieldN Methods _6 :: Lens (a, b, c, d, e, f, g, h) (a, b, c, d, e, f', g, h) f f' Source #
Field6 (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f', g, h, i) f f' Source #
Instance details Defined in Lens.Micro.FieldN Methods _6 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f', g, h, i) f f' Source #

class Field7 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_7 :: Lens s t a b Source #

Instances

Instances details

Field7 (a, b, c, d, e, f, g) (a, b, c, d, e, f, g') g g' Source #
Instance details Defined in Lens.Micro.FieldN Methods _7 :: Lens (a, b, c, d, e, f, g) (a, b, c, d, e, f, g') g g' Source #
Field7 (a, b, c, d, e, f, g, h) (a, b, c, d, e, f, g', h) g g' Source #
Instance details Defined in Lens.Micro.FieldN Methods _7 :: Lens (a, b, c, d, e, f, g, h) (a, b, c, d, e, f, g', h) g g' Source #
Field7 (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f, g', h, i) g g' Source #
Instance details Defined in Lens.Micro.FieldN Methods _7 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f, g', h, i) g g' Source #

class Field8 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_8 :: Lens s t a b Source #

Instances

Instances details

Field8 (a, b, c, d, e, f, g, h) (a, b, c, d, e, f, g, h') h h' Source #
Instance details Defined in Lens.Micro.FieldN Methods _8 :: Lens (a, b, c, d, e, f, g, h) (a, b, c, d, e, f, g, h') h h' Source #
Field8 (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f, g, h', i) h h' Source #
Instance details Defined in Lens.Micro.FieldN Methods _8 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f, g, h', i) h h' Source #

class Field9 s t a b | s -> a, t -> b, s b -> t, t a -> s where Source #

Methods

_9 :: Lens s t a b Source #

Instances

Instances details

Field9 (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f, g, h, i') i i' Source #
Instance details Defined in Lens.Micro.FieldN Methods _9 :: Lens (a, b, c, d, e, f, g, h, i) (a, b, c, d, e, f, g, h, i') i i' Source #