Singletons/T378a.hs:(0,0)-(0,0): Splicing declarations
    singletons
      [d| constBA :: forall b a. a -> b -> a
          constBA x _ = x
          
          data Proxy :: forall k. k -> Type
            where
              Proxy1 :: Proxy a
              Proxy2 :: Proxy (a :: k)
              Proxy3 :: forall a. Proxy a
              Proxy4 :: forall k (a :: k). Proxy a |]
  ======>
    constBA :: forall b a. a -> b -> a
    constBA x _ = x
    data Proxy :: forall k. k -> Type
      where
        Proxy1 :: Proxy a
        Proxy2 :: Proxy (a :: k)
        Proxy3 :: forall a. Proxy a
        Proxy4 :: forall k (a :: k). Proxy a
    type Proxy1Sym0 :: Proxy a
    type family Proxy1Sym0 @a :: Proxy a where
      Proxy1Sym0 = Proxy1
    type Proxy2Sym0 :: Proxy (a :: k)
    type family Proxy2Sym0 @k @(a :: k) :: Proxy (a :: k) where
      Proxy2Sym0 = Proxy2
    type Proxy3Sym0 :: forall a. Proxy a
    type family Proxy3Sym0 @a :: Proxy a where
      Proxy3Sym0 = Proxy3
    type Proxy4Sym0 :: forall k (a :: k). Proxy a
    type family Proxy4Sym0 @k @(a :: k) :: Proxy a where
      Proxy4Sym0 = Proxy4
    type ConstBASym0 :: forall b a. (~>) a ((~>) b a)
    data ConstBASym0 :: (~>) a ((~>) b a)
      where
        ConstBASym0KindInference :: SameKind (Apply ConstBASym0 arg) (ConstBASym1 arg) =>
                                    ConstBASym0 a0123456789876543210
    type instance Apply ConstBASym0 a0123456789876543210 = ConstBASym1 a0123456789876543210
    instance SuppressUnusedWarnings ConstBASym0 where
      suppressUnusedWarnings = snd ((,) ConstBASym0KindInference ())
    type ConstBASym1 :: forall b a. a -> (~>) b a
    data ConstBASym1 (a0123456789876543210 :: a) :: (~>) b a
      where
        ConstBASym1KindInference :: SameKind (Apply (ConstBASym1 a0123456789876543210) arg) (ConstBASym2 a0123456789876543210 arg) =>
                                    ConstBASym1 a0123456789876543210 a0123456789876543210
    type instance Apply (ConstBASym1 a0123456789876543210) a0123456789876543210 = ConstBA a0123456789876543210 a0123456789876543210
    instance SuppressUnusedWarnings (ConstBASym1 a0123456789876543210) where
      suppressUnusedWarnings = snd ((,) ConstBASym1KindInference ())
    type ConstBASym2 :: forall b a. a -> b -> a
    type family ConstBASym2 @b @a (a0123456789876543210 :: a) (a0123456789876543210 :: b) :: a where
      ConstBASym2 a0123456789876543210 a0123456789876543210 = ConstBA a0123456789876543210 a0123456789876543210
    type ConstBA :: forall b a. a -> b -> a
    type family ConstBA @b @a (a :: a) (a :: b) :: a where
      ConstBA @b @a (x :: a) (_ :: b) = x
    sConstBA ::
      forall b a (t :: a) (t :: b). Sing t
                                    -> Sing t -> Sing (Apply (Apply ConstBASym0 t) t :: a)
    sConstBA (sX :: Sing x) _ = sX
    instance SingI (ConstBASym0 :: (~>) a ((~>) b a)) where
      sing = singFun2 @ConstBASym0 sConstBA
    instance SingI d => SingI (ConstBASym1 (d :: a) :: (~>) b a) where
      sing = singFun1 @(ConstBASym1 (d :: a)) (sConstBA (sing @d))
    instance SingI1 (ConstBASym1 :: a -> (~>) b a) where
      liftSing (s :: Sing (d :: a))
        = singFun1 @(ConstBASym1 (d :: a)) (sConstBA s)
    data SProxy :: forall k (a :: k). Proxy a -> Type
      where
        SProxy1 :: forall a. SProxy (Proxy1 :: Proxy a)
        SProxy2 :: forall k (a :: k). SProxy (Proxy2 :: Proxy (a :: k))
        SProxy3 :: forall a. SProxy (Proxy3 :: Proxy a)
        SProxy4 :: forall k (a :: k). SProxy (Proxy4 :: Proxy a)
    type instance Sing @(Proxy a) = SProxy
    instance SingKind a => SingKind (Proxy a) where
      type Demote (Proxy a) = Proxy (Demote a)
      fromSing SProxy1 = Proxy1
      fromSing SProxy2 = Proxy2
      fromSing SProxy3 = Proxy3
      fromSing SProxy4 = Proxy4
      toSing Proxy1 = SomeSing SProxy1
      toSing Proxy2 = SomeSing SProxy2
      toSing Proxy3 = SomeSing SProxy3
      toSing Proxy4 = SomeSing SProxy4
    instance SingI Proxy1 where
      sing = SProxy1
    instance SingI Proxy2 where
      sing = SProxy2
    instance SingI Proxy3 where
      sing = SProxy3
    instance SingI Proxy4 where
      sing = SProxy4