semigroups-0.18.1: Anything that associates

Copyright(C) 2014-2015 Edward Kmett, Eric Mertens
LicenseBSD-style (see the file LICENSE)
MaintainerEdward Kmett <ekmett@gmail.com>
Stabilityprovisional
Portabilityportable
Safe HaskellSafe
LanguageHaskell98

Data.Semigroup.Generic

Description

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

Synopsis

Documentation

class GSemigroup f Source

Minimal complete definition

gmappend'

Instances

GSemigroup V1 Source 

Methods

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

GSemigroup U1 Source 

Methods

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

Semigroup a => GSemigroup (K1 i a) Source 

Methods

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

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

Methods

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

GSemigroup f => GSemigroup (M1 i c f) Source 

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 Source

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 Source

Minimal complete definition

gmempty'

Instances

GMonoid U1 Source 

Methods

gmempty' :: U1 p

(Semigroup a, Monoid a) => GMonoid (K1 i a) Source 

Methods

gmempty' :: K1 i a p

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

Methods

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

GMonoid f => GMonoid (M1 i c f) Source 

Methods

gmempty' :: M1 i c f p

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

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