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{-# LANGUAGE TypeOperators, DeriveGeneric #-}
module Main where
import GHC.Generics hiding (C, D)
import GEq
-- We should be able to generate a generic representation for these types
data C = C0 | C1
deriving Generic
data D a = D0 | D1 { d11 :: a, d12 :: (D a) }
deriving Generic
data (:**:) a b = a :**: b
deriving Generic
-- Example values
c0 = C0
c1 = C1
d0 :: D Char
d0 = D0
d1 = D1 'p' D0
p1 :: Int :**: Char
p1 = 3 :**: 'p'
-- Generic instances
instance GEq C
instance (GEq a) => GEq (D a)
instance (GEq a, GEq b) => GEq (a :**: b)
-- Tests
teq0 = geq c0 c1
teq1 = geq d0 d1
teq2 = geq d0 d0
teq3 = geq p1 p1
main = mapM_ print [teq0, teq1, teq2, teq3]
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