simplistic-generics-0.1.0.0: src/Generics/Simplistic/Derive/Functor.hs

{-# language GADTs,
             TypeOperators,
             FlexibleContexts #-}
module Generics.Simplistic.Derive.Functor where

import Generics.Simplistic

gfmap :: OnLeaves1 Trivial Functor f
      => (a -> b) -> SRep1 f a -> SRep1 f b
gfmap _ S1_U1       = S1_U1
gfmap f (S1_L1 x)   = S1_L1 (gfmap f x)
gfmap f (S1_R1 x)   = S1_R1 (gfmap f x)
gfmap f (x :***: y) = gfmap f x :***: gfmap f y
gfmap f (S1_K1 x)   = S1_K1 x
gfmap f (S1_M1 i x) = S1_M1 i (gfmap f x)
gfmap f (S1_ST x)   = S1_ST (gfmap f x)
gfmap f (S1_Par  x) = S1_Par (f x)
gfmap f (S1_Rec  x) = S1_Rec (fmap f x)
gfmap f (S1_Comp x) = S1_Comp (fmap (gfmap f) x)

gfmap' :: (GenericSy1 f, OnLeaves1 Trivial Functor (Rep1 f))
       => (a -> b) -> f a -> f b
gfmap' f x = toS1 $ gfmap f $ fromS1 x