Singletons/Contains.hs:(0,0)-(0,0): Splicing declarations singletons [d| contains :: Eq a => a -> [a] -> Bool contains _ [] = False contains elt (h : t) = (elt == h) || (contains elt t) |] ======> contains :: Eq a => a -> [a] -> Bool contains _ [] = False contains elt (h : t) = ((elt == h) || (contains elt) t) type ContainsSym2 (a0123456789876543210 :: a0123456789876543210) (a0123456789876543210 :: [a0123456789876543210]) = Contains a0123456789876543210 a0123456789876543210 instance SuppressUnusedWarnings (ContainsSym1 a0123456789876543210) where suppressUnusedWarnings = snd (((,) ContainsSym1KindInference) ()) data ContainsSym1 (a0123456789876543210 :: a0123456789876543210) :: (~>) [a0123456789876543210] Bool where ContainsSym1KindInference :: forall a0123456789876543210 a0123456789876543210 arg. SameKind (Apply (ContainsSym1 a0123456789876543210) arg) (ContainsSym2 a0123456789876543210 arg) => ContainsSym1 a0123456789876543210 a0123456789876543210 type instance Apply (ContainsSym1 a0123456789876543210) a0123456789876543210 = Contains a0123456789876543210 a0123456789876543210 instance SuppressUnusedWarnings ContainsSym0 where suppressUnusedWarnings = snd (((,) ContainsSym0KindInference) ()) data ContainsSym0 :: forall a0123456789876543210. (~>) a0123456789876543210 ((~>) [a0123456789876543210] Bool) where ContainsSym0KindInference :: forall a0123456789876543210 arg. SameKind (Apply ContainsSym0 arg) (ContainsSym1 arg) => ContainsSym0 a0123456789876543210 type instance Apply ContainsSym0 a0123456789876543210 = ContainsSym1 a0123456789876543210 type family Contains (a :: a) (a :: [a]) :: Bool where Contains _ '[] = FalseSym0 Contains elt ('(:) h t) = Apply (Apply (||@#@$) (Apply (Apply (==@#@$) elt) h)) (Apply (Apply ContainsSym0 elt) t) sContains :: forall a (t :: a) (t :: [a]). SEq a => Sing t -> Sing t -> Sing (Apply (Apply ContainsSym0 t) t :: Bool) sContains _ SNil = SFalse sContains (sElt :: Sing elt) (SCons (sH :: Sing h) (sT :: Sing t)) = (applySing ((applySing ((singFun2 @(||@#@$)) (%||))) ((applySing ((applySing ((singFun2 @(==@#@$)) (%==))) sElt)) sH))) ((applySing ((applySing ((singFun2 @ContainsSym0) sContains)) sElt)) sT) instance SEq a => SingI (ContainsSym0 :: (~>) a ((~>) [a] Bool)) where sing = (singFun2 @ContainsSym0) sContains instance (SEq a, SingI d) => SingI (ContainsSym1 (d :: a) :: (~>) [a] Bool) where sing = (singFun1 @(ContainsSym1 (d :: a))) (sContains (sing @d))