Pandora.Pattern.Object.Monoid

Documentation

class Semigroup a => Monoid a where

When providing a new instance, you should ensure it satisfies the two laws:
* Right absorption: zero + x ≡ x
* Left absorption: x + zero ≡ x

Methods

zero :: a

Instances

Monoid (Endo a)

Defined in Pandora.Paradigm.Basis.Endo

Methods

zero :: Endo a

Semigroup a => Monoid (Maybe a)

Defined in Pandora.Paradigm.Basis.Maybe

Methods

zero :: Maybe a

Monoid a => Monoid (Identity a)

Defined in Pandora.Paradigm.Basis.Identity

Methods

zero :: Identity a

(Monoid a, forall b. Semigroup b => Monoid (t b)) => Monoid (Twister t a)

Defined in Pandora.Paradigm.Basis.Twister

Methods

zero :: Twister t a

(Monoid a, Monoid b) => Monoid (Product a b)

Defined in Pandora.Paradigm.Basis.Product

Methods

zero :: Product a b

Monoid a => Monoid (Tagged tag a)

Defined in Pandora.Paradigm.Basis.Tagged

Methods

zero :: Tagged tag a

Monoid a => Monoid (Constant a b)

Defined in Pandora.Paradigm.Basis.Constant

Methods

zero :: Constant a b

(forall (u' :: k2 -> Type). Monoid ((u' :.: t u') a)) => Monoid (Y t u a)

Defined in Pandora.Paradigm.Junction.Transformer

Methods

zero :: Y t u a

Monoid ((u :.: t) a) => Monoid (T t u a)

Defined in Pandora.Paradigm.Junction.Transformer

Methods

zero :: T t u a