Data.Extensible.Match

Pattern matching

Documentation

matchWith :: (forall x. f x -> g x -> r) -> (f :* xs) -> (g :| xs) -> r

Retrieve the contents so that they matches and pass both to the given function.

newtype Match h r x

Turn a wrapper type into a clause for it.

Constructors

Match

Fields

• runMatch :: h x -> r

Instances

Wrapper k h => Wrapper k (Match k h r)

Associated Types

type Repr (Match k h r) (h :: Match k h r -> *) (v :: Match k h r) :: *

Methods

_Wrapper :: (Functor f, Profunctor p) => Optic' * * p f (h v) (Repr (Match k h r) h v)

type Repr k (Match k h r) x

type Repr k (Match k h r) x = Repr k h x -> r

match :: (Match h a :* xs) -> (h :| xs) -> a

O(1) Perform pattern matching.

mapMatch :: (a -> b) -> Match h a x -> Match h b x

Applies a function to the result of Match.

caseOf :: (h :| xs) -> (Match h a :* xs) -> a infix 0

Flipped match