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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 8fef28d · 2026-11-02

Modulehxt-9.3.1.22Haskell2010

Data.Function.Selector

Synopsis

data Selector
value chgS
value chgM
value mkSelector
value idS
value .&&&.
class Comp1
class Comp2
class Comp3

Packagehxt-9.3.1.22
Exports9
LanguageHaskell2010
LicenceMIT
SourceSelector.hs

datadata Selector s a

A Selector is a pair of an access function and a modifying function for reading and updating parts of a composite type

Constructors

S
- getS :: s -> a
- setS :: a -> s -> s

Instances1Category

Category SelectorDefined in hxt-9.3.1.22 · Data.Function.Selector

valuechgS :: Selector s a -> (a -> a) -> s -> s

valuechgM :: Monad m => Selector s a -> (a -> m a) -> s -> m s

valuemkSelector :: (s -> a) -> (a -> s -> s) -> Selector s a

Alias for constructor S

valueidS :: Selector s s

value(.&&&.) :: Selector s a -> Selector s b -> Selector s (a, b)

classclass Comp1 s a | s -> a where

Selectors for pairs and 3-tuples: comp1, comp2, comp3, this can be extended to n-tuples

Methods

comp1 :: Selector s a

Instances2Comp1

Comp1 (a, b) aDefined in hxt-9.3.1.22 · Data.Function.Selector
Comp1 (a, b, c) aDefined in hxt-9.3.1.22 · Data.Function.Selector

classclass Comp2 s a | s -> a where

Methods

comp2 :: Selector s a

Instances2Comp2

Comp2 (a, b) bDefined in hxt-9.3.1.22 · Data.Function.Selector
Comp2 (a, b, c) bDefined in hxt-9.3.1.22 · Data.Function.Selector

classclass Comp3 s a | s -> a where

Methods

comp3 :: Selector s a

Instances1Comp3

Comp3 (a, b, c) cDefined in hxt-9.3.1.22 · Data.Function.Selector