Copyright	(C) 2014-2015 Edward Kmett Eric Mertens
License	BSD-style (see the file LICENSE)
Maintainer	Edward Kmett <ekmett@gmail.com>
Stability	provisional
Portability	portable
Safe Haskell	Safe
Language	Haskell98

Data.Semigroup.Generic

Description

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

Synopsis

class GSemigroup f
gmappend :: (Generic a, GSemigroup (Rep a)) => a -> a -> a
class GSemigroup f => GMonoid f
gmempty :: (Generic a, GMonoid (Rep a)) => a

Documentation

class GSemigroup f #

Minimal complete definition

gmappend'

Instances

GSemigroup (V1 :: Type -> Type) #
Instance details Defined in Data.Semigroup.Generic Methods gmappend' :: V1 p -> V1 p -> V1 p
GSemigroup (U1 :: Type -> Type) #
Instance details Defined in Data.Semigroup.Generic Methods gmappend' :: U1 p -> U1 p -> U1 p
Semigroup a => GSemigroup (K1 i a :: Type -> Type) #
Instance details 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) #
Instance details Defined in Data.Semigroup.Generic Methods gmappend' :: (f :: g) p -> (f :: g) p -> (f :*: g) p
GSemigroup f => GSemigroup (M1 i c f) #
Instance details 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) #
Instance details Defined in Data.Semigroup.Generic Methods gmempty' :: U1 p
(Semigroup a, Monoid a) => GMonoid (K1 i a :: Type -> Type) #
Instance details Defined in Data.Semigroup.Generic Methods gmempty' :: K1 i a p
(GMonoid f, GMonoid g) => GMonoid (f :*: g) #
Instance details Defined in Data.Semigroup.Generic Methods gmempty' :: (f :*: g) p
GMonoid f => GMonoid (M1 i c f) #
Instance details 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