Singletons/FunDeps.hs:(0,0)-(0,0): Splicing declarations
    singletons
      [d| t1 = meth True
          
          class FD a b | a -> b where
            meth :: a -> a
            l2r :: a -> b
          
          instance FD Bool Nat where
            meth = not
            l2r False = 0
            l2r True = 1 |]
  ======>
    class FD a b | a -> b where
      meth :: a -> a
      l2r :: a -> b
    instance FD Bool Nat where
      meth = not
      l2r False = 0
      l2r True = 1
    t1 = meth True
    type T1Sym0 = T1
    type family T1 where
      T1 = Apply MethSym0 TrueSym0
    type MethSym1 (t :: a0123456789876543210) = Meth t
    instance SuppressUnusedWarnings MethSym0 where
      suppressUnusedWarnings
        = snd ((GHC.Tuple.(,) MethSym0KindInference) GHC.Tuple.())
    data MethSym0 (l :: TyFun a0123456789876543210 a0123456789876543210)
      = forall arg. SameKind (Apply MethSym0 arg) (MethSym1 arg) =>
        MethSym0KindInference
    type instance Apply MethSym0 l = Meth l
    type L2rSym1 (t :: a0123456789876543210) = L2r t
    instance SuppressUnusedWarnings L2rSym0 where
      suppressUnusedWarnings
        = snd ((GHC.Tuple.(,) L2rSym0KindInference) GHC.Tuple.())
    data L2rSym0 (l :: TyFun a0123456789876543210 b0123456789876543210)
      = forall arg. SameKind (Apply L2rSym0 arg) (L2rSym1 arg) =>
        L2rSym0KindInference
    type instance Apply L2rSym0 l = L2r l
    class PFD (a :: GHC.Types.Type) (b :: GHC.Types.Type) | a -> b where
      type Meth (arg :: a) :: a
      type L2r (arg :: a) :: b
    type family Meth_0123456789876543210 (a :: Bool) :: Bool where
      Meth_0123456789876543210 a_0123456789876543210 = Apply NotSym0 a_0123456789876543210
    type Meth_0123456789876543210Sym1 (t :: Bool) =
        Meth_0123456789876543210 t
    instance SuppressUnusedWarnings Meth_0123456789876543210Sym0 where
      suppressUnusedWarnings
        = snd
            ((GHC.Tuple.(,) Meth_0123456789876543210Sym0KindInference)
               GHC.Tuple.())
    data Meth_0123456789876543210Sym0 (l :: TyFun Bool Bool)
      = forall arg. SameKind (Apply Meth_0123456789876543210Sym0 arg) (Meth_0123456789876543210Sym1 arg) =>
        Meth_0123456789876543210Sym0KindInference
    type instance Apply Meth_0123456789876543210Sym0 l = Meth_0123456789876543210 l
    type family L2r_0123456789876543210 (a :: Bool) :: Nat where
      L2r_0123456789876543210 False = FromInteger 0
      L2r_0123456789876543210 True = FromInteger 1
    type L2r_0123456789876543210Sym1 (t :: Bool) =
        L2r_0123456789876543210 t
    instance SuppressUnusedWarnings L2r_0123456789876543210Sym0 where
      suppressUnusedWarnings
        = snd
            ((GHC.Tuple.(,) L2r_0123456789876543210Sym0KindInference)
               GHC.Tuple.())
    data L2r_0123456789876543210Sym0 (l :: TyFun Bool Nat)
      = forall arg. SameKind (Apply L2r_0123456789876543210Sym0 arg) (L2r_0123456789876543210Sym1 arg) =>
        L2r_0123456789876543210Sym0KindInference
    type instance Apply L2r_0123456789876543210Sym0 l = L2r_0123456789876543210 l
    instance PFD Bool Nat where
      type Meth a = Apply Meth_0123456789876543210Sym0 a
      type L2r a = Apply L2r_0123456789876543210Sym0 a
    sT1 :: Sing T1Sym0
    sT1 = (applySing ((singFun1 @MethSym0) sMeth)) STrue
    class SFD a b | a -> b where
      sMeth :: forall (t :: a). Sing t -> Sing (Apply MethSym0 t :: a)
      sL2r :: forall (t :: a). Sing t -> Sing (Apply L2rSym0 t :: b)
    instance SFD Bool Nat where
      sMeth ::
        forall (t :: Bool). Sing t -> Sing (Apply MethSym0 t :: Bool)
      sL2r :: forall (t :: Bool). Sing t -> Sing (Apply L2rSym0 t :: Nat)
      sMeth (sA_0123456789876543210 :: Sing a_0123456789876543210)
        = (applySing ((singFun1 @NotSym0) sNot)) sA_0123456789876543210
      sL2r SFalse = sFromInteger (sing :: Sing 0)
      sL2r STrue = sFromInteger (sing :: Sing 1)