Data.Pattern.Base.Tuple

Various types defined inductively as type families or data families on type-lists.

Functions

type family Fun xs r

Curried functions. We have

Fun '[x1, ..., xn] r   =   x1 -> ... -> xn -> r

Instances

type Fun ([] *) r = r

type Fun ((:) * h t) r = h -> Fun t r

Tuples

data Tuple xs

Tuples with types given by xs.

zeroT :: Tuple []

The empty tuple

oneT :: a -> Tuple `[a]`

The singleton tuple

(<>) :: Tuple xs -> Tuple ys -> Tuple (xs :++: ys)

Concatenation of tuples.

runTuple :: Tuple xs -> Fun xs r -> r

Runs a tuple by applying it to a curried function.

Mapping and distributing over tuples

type family Map f xs :: [*]

Instances

type Map f ([] *) = [] *

type Map f ((:) * h t) = (:) * (f h) (Map f t)

class Distribute xs where

Methods

distribute :: Functor f => f (Tuple xs) -> Tuple (Map f xs)

Instances

Distribute ([] *)

(Uncurriable t, Tupable t, Distribute t) => Distribute ((:) * h t)