Singletons/T378b.hs:(0,0)-(0,0): Splicing declarations
    singletons
      [d| f :: forall b a. a -> b -> ()
          f _ _ = ()
          natMinus :: Nat -> Nat -> Nat
          natMinus Zero _ = Zero
          natMinus (Succ a) (Succ b) = natMinus a b
          natMinus a@(Succ _) Zero = a
          
          type C :: forall b a. a -> b -> Constraint
          type D :: forall b a. a -> b -> Type
          
          class C x y
          data D x y |]
  ======>
    type C :: forall b a. a -> b -> Constraint
    class C x y
    type D :: forall b a. a -> b -> Type
    data D x y
    f :: forall b a. a -> b -> ()
    f _ _ = ()
    natMinus :: Nat -> Nat -> Nat
    natMinus Zero _ = Zero
    natMinus (Succ a) (Succ b) = natMinus a b
    natMinus a@(Succ _) Zero = a
    data Let0123456789876543210ASym0 wild_01234567898765432100123456789876543210
      where
        Let0123456789876543210ASym0KindInference :: SameKind (Apply Let0123456789876543210ASym0 arg) (Let0123456789876543210ASym1 arg) =>
                                                    Let0123456789876543210ASym0 wild_01234567898765432100123456789876543210
    type instance Apply Let0123456789876543210ASym0 wild_01234567898765432100123456789876543210 = Let0123456789876543210A wild_01234567898765432100123456789876543210
    instance SuppressUnusedWarnings Let0123456789876543210ASym0 where
      suppressUnusedWarnings
        = snd ((,) Let0123456789876543210ASym0KindInference ())
    type family Let0123456789876543210ASym1 wild_01234567898765432100123456789876543210 where
      Let0123456789876543210ASym1 wild_01234567898765432100123456789876543210 = Let0123456789876543210A wild_01234567898765432100123456789876543210
    type family Let0123456789876543210A wild_0123456789876543210 where
      Let0123456789876543210A wild_0123456789876543210 = Apply SuccSym0 wild_0123456789876543210
    type NatMinusSym0 :: (~>) Nat ((~>) Nat Nat)
    data NatMinusSym0 :: (~>) Nat ((~>) Nat Nat)
      where
        NatMinusSym0KindInference :: SameKind (Apply NatMinusSym0 arg) (NatMinusSym1 arg) =>
                                     NatMinusSym0 a0123456789876543210
    type instance Apply NatMinusSym0 a0123456789876543210 = NatMinusSym1 a0123456789876543210
    instance SuppressUnusedWarnings NatMinusSym0 where
      suppressUnusedWarnings = snd ((,) NatMinusSym0KindInference ())
    type NatMinusSym1 :: Nat -> (~>) Nat Nat
    data NatMinusSym1 (a0123456789876543210 :: Nat) :: (~>) Nat Nat
      where
        NatMinusSym1KindInference :: SameKind (Apply (NatMinusSym1 a0123456789876543210) arg) (NatMinusSym2 a0123456789876543210 arg) =>
                                     NatMinusSym1 a0123456789876543210 a0123456789876543210
    type instance Apply (NatMinusSym1 a0123456789876543210) a0123456789876543210 = NatMinus a0123456789876543210 a0123456789876543210
    instance SuppressUnusedWarnings (NatMinusSym1 a0123456789876543210) where
      suppressUnusedWarnings = snd ((,) NatMinusSym1KindInference ())
    type NatMinusSym2 :: Nat -> Nat -> Nat
    type family NatMinusSym2 (a0123456789876543210 :: Nat) (a0123456789876543210 :: Nat) :: Nat where
      NatMinusSym2 a0123456789876543210 a0123456789876543210 = NatMinus a0123456789876543210 a0123456789876543210
    type FSym0 :: forall b a. (~>) a ((~>) b ())
    data FSym0 :: (~>) a ((~>) b ())
      where
        FSym0KindInference :: SameKind (Apply FSym0 arg) (FSym1 arg) =>
                              FSym0 a0123456789876543210
    type instance Apply FSym0 a0123456789876543210 = FSym1 a0123456789876543210
    instance SuppressUnusedWarnings FSym0 where
      suppressUnusedWarnings = snd ((,) FSym0KindInference ())
    type FSym1 :: forall b a. a -> (~>) b ()
    data FSym1 (a0123456789876543210 :: a) :: (~>) b ()
      where
        FSym1KindInference :: SameKind (Apply (FSym1 a0123456789876543210) arg) (FSym2 a0123456789876543210 arg) =>
                              FSym1 a0123456789876543210 a0123456789876543210
    type instance Apply (FSym1 a0123456789876543210) a0123456789876543210 = F a0123456789876543210 a0123456789876543210
    instance SuppressUnusedWarnings (FSym1 a0123456789876543210) where
      suppressUnusedWarnings = snd ((,) FSym1KindInference ())
    type FSym2 :: forall b a. a -> b -> ()
    type family FSym2 (a0123456789876543210 :: a) (a0123456789876543210 :: b) :: () where
      FSym2 a0123456789876543210 a0123456789876543210 = F a0123456789876543210 a0123456789876543210
    type NatMinus :: Nat -> Nat -> Nat
    type family NatMinus (a :: Nat) (a :: Nat) :: Nat where
      NatMinus 'Zero _ = ZeroSym0
      NatMinus ('Succ a) ('Succ b) = Apply (Apply NatMinusSym0 a) b
      NatMinus ('Succ wild_0123456789876543210) 'Zero = Let0123456789876543210ASym1 wild_0123456789876543210
    type F :: forall b a. a -> b -> ()
    type family F (a :: a) (a :: b) :: () where
      F _ _ = Tuple0Sym0
    type PC :: forall b a. a -> b -> Constraint
    class PC x y
    sNatMinus ::
      (forall (t :: Nat) (t :: Nat).
       Sing t
       -> Sing t -> Sing (Apply (Apply NatMinusSym0 t) t :: Nat) :: Type)
    sF ::
      forall b a (t :: a) (t :: b). Sing t
                                    -> Sing t -> Sing (Apply (Apply FSym0 t) t :: ())
    sNatMinus SZero _ = SZero
    sNatMinus (SSucc (sA :: Sing a)) (SSucc (sB :: Sing b))
      = applySing (applySing (singFun2 @NatMinusSym0 sNatMinus) sA) sB
    sNatMinus
      (SSucc (sWild_0123456789876543210 :: Sing wild_0123456789876543210))
      SZero
      = let
          sA ::
            Sing @_ (Let0123456789876543210ASym1 wild_0123456789876543210)
          sA = applySing (singFun1 @SuccSym0 SSucc) sWild_0123456789876543210
        in sA
    sF _ _ = STuple0
    instance SingI (NatMinusSym0 :: (~>) Nat ((~>) Nat Nat)) where
      sing = singFun2 @NatMinusSym0 sNatMinus
    instance SingI d =>
             SingI (NatMinusSym1 (d :: Nat) :: (~>) Nat Nat) where
      sing = singFun1 @(NatMinusSym1 (d :: Nat)) (sNatMinus (sing @d))
    instance SingI1 (NatMinusSym1 :: Nat -> (~>) Nat Nat) where
      liftSing (s :: Sing (d :: Nat))
        = singFun1 @(NatMinusSym1 (d :: Nat)) (sNatMinus s)
    instance SingI (FSym0 :: (~>) a ((~>) b ())) where
      sing = singFun2 @FSym0 sF
    instance SingI d => SingI (FSym1 (d :: a) :: (~>) b ()) where
      sing = singFun1 @(FSym1 (d :: a)) (sF (sing @d))
    instance SingI1 (FSym1 :: a -> (~>) b ()) where
      liftSing (s :: Sing (d :: a)) = singFun1 @(FSym1 (d :: a)) (sF s)
    type SD :: forall b a (x :: a) (y :: b). D x y -> Type
    data SD :: forall b a (x :: a) (y :: b). D x y -> Type
    type instance Sing @(D x y) = SD
    instance (SingKind x, SingKind y) => SingKind (D x y) where
      type Demote (D x y) = D (Demote x) (Demote y)
      fromSing x = case x of {}
      toSing x = SomeSing (case x of {})
    class SC x y
    type SC :: forall b a. a -> b -> Constraint