Singletons/Classes2.hs:(0,0)-(0,0): Splicing declarations
    singletons
      [d| data NatFoo = ZeroFoo | SuccFoo NatFoo
          
          instance MyOrd NatFoo where
            ZeroFoo `mycompare` ZeroFoo = EQ
            ZeroFoo `mycompare` (SuccFoo _) = LT
            (SuccFoo _) `mycompare` ZeroFoo = GT
            (SuccFoo n) `mycompare` (SuccFoo m) = m `mycompare` n |]
  ======>
    data NatFoo = ZeroFoo | SuccFoo NatFoo
    instance MyOrd NatFoo where
      mycompare ZeroFoo ZeroFoo = EQ
      mycompare ZeroFoo (SuccFoo _) = LT
      mycompare (SuccFoo _) ZeroFoo = GT
      mycompare (SuccFoo n) (SuccFoo m) = (m `mycompare` n)
    type ZeroFooSym0 = ZeroFoo
    type SuccFooSym1 (t :: NatFoo) = SuccFoo t
    instance SuppressUnusedWarnings SuccFooSym0 where
      suppressUnusedWarnings
        = snd ((GHC.Tuple.(,) SuccFooSym0KindInference) GHC.Tuple.())
    data SuccFooSym0 (l :: TyFun NatFoo NatFoo)
      = forall arg. SameKind (Apply SuccFooSym0 arg) (SuccFooSym1 arg) =>
        SuccFooSym0KindInference
    type instance Apply SuccFooSym0 l = SuccFoo l
    type family Mycompare_0123456789876543210 (a :: NatFoo) (a :: NatFoo) :: Ordering where
      Mycompare_0123456789876543210 ZeroFoo ZeroFoo = EQSym0
      Mycompare_0123456789876543210 ZeroFoo (SuccFoo _) = LTSym0
      Mycompare_0123456789876543210 (SuccFoo _) ZeroFoo = GTSym0
      Mycompare_0123456789876543210 (SuccFoo n) (SuccFoo m) = Apply (Apply MycompareSym0 m) n
    type Mycompare_0123456789876543210Sym2 (t :: NatFoo) (t :: NatFoo) =
        Mycompare_0123456789876543210 t t
    instance SuppressUnusedWarnings Mycompare_0123456789876543210Sym1 where
      suppressUnusedWarnings
        = snd
            ((GHC.Tuple.(,) Mycompare_0123456789876543210Sym1KindInference)
               GHC.Tuple.())
    data Mycompare_0123456789876543210Sym1 (l :: NatFoo) (l :: TyFun NatFoo Ordering)
      = forall arg. SameKind (Apply (Mycompare_0123456789876543210Sym1 l) arg) (Mycompare_0123456789876543210Sym2 l arg) =>
        Mycompare_0123456789876543210Sym1KindInference
    type instance Apply (Mycompare_0123456789876543210Sym1 l) l = Mycompare_0123456789876543210 l l
    instance SuppressUnusedWarnings Mycompare_0123456789876543210Sym0 where
      suppressUnusedWarnings
        = snd
            ((GHC.Tuple.(,) Mycompare_0123456789876543210Sym0KindInference)
               GHC.Tuple.())
    data Mycompare_0123456789876543210Sym0 (l :: TyFun NatFoo (TyFun NatFoo Ordering
                                                               -> GHC.Types.Type))
      = forall arg. SameKind (Apply Mycompare_0123456789876543210Sym0 arg) (Mycompare_0123456789876543210Sym1 arg) =>
        Mycompare_0123456789876543210Sym0KindInference
    type instance Apply Mycompare_0123456789876543210Sym0 l = Mycompare_0123456789876543210Sym1 l
    instance PMyOrd NatFoo where
      type Mycompare a a = Apply (Apply Mycompare_0123456789876543210Sym0 a) a
    data instance Sing (z :: NatFoo)
      where
        SZeroFoo :: Sing ZeroFoo
        SSuccFoo :: forall (n :: NatFoo).
                    (Sing (n :: NatFoo)) -> Sing (SuccFoo n)
    type SNatFoo = (Sing :: NatFoo -> GHC.Types.Type)
    instance SingKind NatFoo where
      type Demote NatFoo = NatFoo
      fromSing SZeroFoo = ZeroFoo
      fromSing (SSuccFoo b) = SuccFoo (fromSing b)
      toSing ZeroFoo = SomeSing SZeroFoo
      toSing (SuccFoo (b :: Demote NatFoo))
        = case toSing b :: SomeSing NatFoo of {
            SomeSing c -> SomeSing (SSuccFoo c) }
    instance SMyOrd NatFoo where
      sMycompare ::
        forall (t1 :: NatFoo) (t2 :: NatFoo).
        Sing t1
        -> Sing t2
           -> Sing (Apply (Apply (MycompareSym0 :: TyFun NatFoo (TyFun NatFoo Ordering
                                                                 -> GHC.Types.Type)
                                                   -> GHC.Types.Type) t1) t2)
      sMycompare SZeroFoo SZeroFoo = SEQ
      sMycompare SZeroFoo (SSuccFoo _) = SLT
      sMycompare (SSuccFoo _) SZeroFoo = SGT
      sMycompare (SSuccFoo (sN :: Sing n)) (SSuccFoo (sM :: Sing m))
        = (applySing
             ((applySing ((singFun2 @MycompareSym0) sMycompare)) sM))
            sN
    instance SingI ZeroFoo where
      sing = SZeroFoo
    instance SingI n => SingI (SuccFoo (n :: NatFoo)) where
      sing = SSuccFoo sing