Safe Haskell | Safe |
---|---|

Language | Haskell2010 |

# Documentation

newtype CaseFunc k r xs Source #

This handler stores a polymorphic function that returns a different type.

let y =`pick`

(5 :: Int) ::`Which`

'[Int, Bool]`switch`

y (`CaseFunc`

@`Typeable`

(show . typeRep . (pure @Proxy))) `shouldBe` Int

let x = (5 :: Int)`./`

False`./`

'X'`./`

Just 'O'`./`

(6 :: Int)`./`

Just 'A'`./`

`nul`

`afoldr`

(:) [] (`forMany`

(`CaseFunc`

@`Typeable`

(show . typeRep . (pure @Proxy))) x) `shouldBe` ["Int", "Bool", "Char", "Maybe Char", "Int", "Maybe Char"]

CaseFunc (forall x. k x => x -> r) |

newtype CaseFunc' k xs Source #

This handler stores a polymorphic function that doesn't change the type.

let x = (5 :: Int)`./`

(6 :: Int8)`./`

(7 :: Int16)`./`

(8 :: Int32)`./`

`nil`

y = (15 :: Int)`./`

(16 :: Int8)`./`

(17 :: Int16)`./`

(18 :: Int32)`./`

`nil`

`afmap`

(`CaseFunc'`

@`Num`

(+10)) x `shouldBe` y

CaseFunc' (forall x. k x => x -> x) |