Pandora.Pattern.Object.Group

Documentation

class Monoid a => Group a where

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

Minimal complete definition

invert

Methods

invert :: a -> a

(-) :: a -> a -> a infixl 6

Instances

Group a => Group (Identity a)

Defined in Pandora.Paradigm.Primary.Functor.Identity

Methods

invert :: Identity a -> Identity a

(-) :: Identity a -> Identity a -> Identity a

(Group s, Group a) => Group (s :*: a)

Defined in Pandora.Paradigm.Primary.Functor.Product

Methods

invert :: (s :*: a) -> s :*: a

(-) :: (s :*: a) -> (s :*: a) -> s :*: a

Group a => Group (Tagged tag a)

Defined in Pandora.Paradigm.Primary.Functor.Tagged

Methods

invert :: Tagged tag a -> Tagged tag a

(-) :: Tagged tag a -> Tagged tag a -> Tagged tag a

Group a => Group (Constant a b)

Defined in Pandora.Paradigm.Primary.Functor.Constant

Methods

invert :: Constant a b -> Constant a b

(-) :: Constant a b -> Constant a b -> Constant a b