Pandora.Pattern.Functor.Alternative

Documentation

class Covariant t => Alternative t where

When providing a new instance, you should ensure it satisfies the two laws:
* Associativity of <+>: (x <+> y) <+> z ≡ x <+> (y <+> z)
* Left-distributes <$> over <+>: f <$> (x <+> y) ≡ (f <$> x) <+> (f <$> y)

Minimal complete definition

(<+>)

Methods

(<+>) :: t a -> t a -> t a infixl 3

Infix version of alter

alter :: t a -> t a -> t a

Prefix version of <+>

Instances

Alternative Maybe

Defined in Pandora.Paradigm.Basis.Maybe

Methods

(<+>) :: Maybe a -> Maybe a -> Maybe a

alter :: Maybe a -> Maybe a -> Maybe a

Alternative Stack

Defined in Pandora.Paradigm.Structure.Stack

Methods

(<+>) :: Stack a -> Stack a -> Stack a

alter :: Stack a -> Stack a -> Stack a

Alternative t => Alternative (Yoneda t)

Defined in Pandora.Paradigm.Basis.Yoneda

Methods

(<+>) :: Yoneda t a -> Yoneda t a -> Yoneda t a

alter :: Yoneda t a -> Yoneda t a -> Yoneda t a

Alternative (Proxy :: Type -> Type)

Defined in Pandora.Paradigm.Basis.Proxy

Methods

(<+>) :: Proxy a -> Proxy a -> Proxy a

alter :: Proxy a -> Proxy a -> Proxy a

Alternative t => Alternative (Free t)

Defined in Pandora.Paradigm.Basis.Free

Methods

(<+>) :: Free t a -> Free t a -> Free t a

alter :: Free t a -> Free t a -> Free t a

Alternative (Validation e)

Defined in Pandora.Paradigm.Basis.Validation

Methods

(<+>) :: Validation e a -> Validation e a -> Validation e a

alter :: Validation e a -> Validation e a -> Validation e a

Alternative t => Alternative (Jack t)

Defined in Pandora.Paradigm.Basis.Jack

Methods

(<+>) :: Jack t a -> Jack t a -> Jack t a

alter :: Jack t a -> Jack t a -> Jack t a

Alternative (Conclusion e)

Defined in Pandora.Paradigm.Basis.Conclusion

Methods

(<+>) :: Conclusion e a -> Conclusion e a -> Conclusion e a

alter :: Conclusion e a -> Conclusion e a -> Conclusion e a