Data.Semigroup.Generic

This module provides generic deriving tools for monoids and semigroups for product-like structures.

Documentation

class GSemigroup f

Minimal complete definition

gmappend'

Instances

GSemigroup (V1 :: Type -> Type)

Defined in Data.Semigroup.Generic

Methods

gmappend' :: V1 p -> V1 p -> V1 p

GSemigroup (U1 :: Type -> Type)

Defined in Data.Semigroup.Generic

Methods

gmappend' :: U1 p -> U1 p -> U1 p

Semigroup a => GSemigroup (K1 i a :: Type -> Type)

Defined in Data.Semigroup.Generic

Methods

gmappend' :: K1 i a p -> K1 i a p -> K1 i a p

(GSemigroup f, GSemigroup g) => GSemigroup (f :*: g)

Defined in Data.Semigroup.Generic

Methods

gmappend' :: (f :*: g) p -> (f :*: g) p -> (f :*: g) p

GSemigroup f => GSemigroup (M1 i c f)

Defined in Data.Semigroup.Generic

Methods

gmappend' :: M1 i c f p -> M1 i c f p -> M1 i c f p

gmappend :: (Generic a, GSemigroup (Rep a)) => a -> a -> a

Generically generate a Semigroup (<>) operation for any type implementing Generic. This operation will append two values by point-wise appending their component fields. It is only defined for product types.

gmappend a (gmappend b c) = gmappend (gmappend a b) c

class GSemigroup f => GMonoid f

Minimal complete definition

gmempty'

Instances

GMonoid (U1 :: Type -> Type)

Defined in Data.Semigroup.Generic

Methods

gmempty' :: U1 p

(Semigroup a, Monoid a) => GMonoid (K1 i a :: Type -> Type)

Defined in Data.Semigroup.Generic

Methods

gmempty' :: K1 i a p

(GMonoid f, GMonoid g) => GMonoid (f :*: g)

Defined in Data.Semigroup.Generic

Methods

gmempty' :: (f :*: g) p

GMonoid f => GMonoid (M1 i c f)

Defined in Data.Semigroup.Generic

Methods

gmempty' :: M1 i c f p

gmempty :: (Generic a, GMonoid (Rep a)) => a

Generically generate a Monoid mempty for any product-like type implementing Generic.

It is only defined for product types.

gmappend gmempty a = a = gmappend a gmempty