singletons-2.3: tests/compile-and-dump/Singletons/EnumDeriving.ghc82.template
Singletons/EnumDeriving.hs:(0,0)-(0,0): Splicing declarations
singletons
[d| data Foo
= Bar | Baz | Bum
deriving Enum
data Quux = Q1 | Q2 |]
======>
data Foo
= Bar | Baz | Bum
deriving Enum
data Quux = Q1 | Q2
type BarSym0 = Bar
type BazSym0 = Baz
type BumSym0 = Bum
type Q1Sym0 = Q1
type Q2Sym0 = Q2
type family Case_0123456789876543210 n t where
Case_0123456789876543210 n True = BumSym0
Case_0123456789876543210 n False = Apply ErrorSym0 "toEnum: bad argument"
type family Case_0123456789876543210 n t where
Case_0123456789876543210 n True = BazSym0
Case_0123456789876543210 n False = Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 2))
type family Case_0123456789876543210 n t where
Case_0123456789876543210 n True = BarSym0
Case_0123456789876543210 n False = Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 1))
type family ToEnum_0123456789876543210 (a :: GHC.Types.Nat) :: Foo where
ToEnum_0123456789876543210 n = Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 0))
type ToEnum_0123456789876543210Sym1 (t :: GHC.Types.Nat) =
ToEnum_0123456789876543210 t
instance SuppressUnusedWarnings ToEnum_0123456789876543210Sym0 where
suppressUnusedWarnings _
= snd
((GHC.Tuple.(,) ToEnum_0123456789876543210Sym0KindInference)
GHC.Tuple.())
data ToEnum_0123456789876543210Sym0 (l :: TyFun GHC.Types.Nat Foo)
= forall arg. SameKind (Apply ToEnum_0123456789876543210Sym0 arg) (ToEnum_0123456789876543210Sym1 arg) =>
ToEnum_0123456789876543210Sym0KindInference
type instance Apply ToEnum_0123456789876543210Sym0 l = ToEnum_0123456789876543210 l
type family FromEnum_0123456789876543210 (a :: Foo) :: GHC.Types.Nat where
FromEnum_0123456789876543210 Bar = FromInteger 0
FromEnum_0123456789876543210 Baz = FromInteger 1
FromEnum_0123456789876543210 Bum = FromInteger 2
type FromEnum_0123456789876543210Sym1 (t :: Foo) =
FromEnum_0123456789876543210 t
instance SuppressUnusedWarnings FromEnum_0123456789876543210Sym0 where
suppressUnusedWarnings _
= snd
((GHC.Tuple.(,) FromEnum_0123456789876543210Sym0KindInference)
GHC.Tuple.())
data FromEnum_0123456789876543210Sym0 (l :: TyFun Foo GHC.Types.Nat)
= forall arg. SameKind (Apply FromEnum_0123456789876543210Sym0 arg) (FromEnum_0123456789876543210Sym1 arg) =>
FromEnum_0123456789876543210Sym0KindInference
type instance Apply FromEnum_0123456789876543210Sym0 l = FromEnum_0123456789876543210 l
instance PEnum Foo where
type ToEnum (a :: GHC.Types.Nat) = Apply ToEnum_0123456789876543210Sym0 a
type FromEnum (a :: Foo) = Apply FromEnum_0123456789876543210Sym0 a
data instance Sing (z :: Foo)
= z ~ Bar => SBar | z ~ Baz => SBaz | z ~ Bum => SBum
type SFoo = (Sing :: Foo -> GHC.Types.Type)
instance SingKind Foo where
type Demote Foo = Foo
fromSing SBar = Bar
fromSing SBaz = Baz
fromSing SBum = Bum
toSing Bar = SomeSing SBar
toSing Baz = SomeSing SBaz
toSing Bum = SomeSing SBum
data instance Sing (z :: Quux) = z ~ Q1 => SQ1 | z ~ Q2 => SQ2
type SQuux = (Sing :: Quux -> GHC.Types.Type)
instance SingKind Quux where
type Demote Quux = Quux
fromSing SQ1 = Q1
fromSing SQ2 = Q2
toSing Q1 = SomeSing SQ1
toSing Q2 = SomeSing SQ2
instance SEnum Foo where
sToEnum ::
forall (t :: GHC.Types.Nat).
Sing t
-> Sing (Apply (ToEnumSym0 :: TyFun GHC.Types.Nat Foo
-> GHC.Types.Type) t :: Foo)
sFromEnum ::
forall (t :: Foo).
Sing t
-> Sing (Apply (FromEnumSym0 :: TyFun Foo GHC.Types.Nat
-> GHC.Types.Type) t :: GHC.Types.Nat)
sToEnum (sN :: Sing n)
= case
(applySing ((applySing ((singFun2 @(:==$)) (%:==))) sN))
(sFromInteger (sing :: Sing 0))
of
STrue -> SBar
SFalse
-> case
(applySing ((applySing ((singFun2 @(:==$)) (%:==))) sN))
(sFromInteger (sing :: Sing 1))
of
STrue -> SBaz
SFalse
-> case
(applySing ((applySing ((singFun2 @(:==$)) (%:==))) sN))
(sFromInteger (sing :: Sing 2))
of
STrue -> SBum
SFalse -> sError (sing :: Sing "toEnum: bad argument") ::
Sing (Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 2)) :: Foo) ::
Sing (Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 1)) :: Foo) ::
Sing (Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 0)) :: Foo)
sFromEnum SBar = sFromInteger (sing :: Sing 0)
sFromEnum SBaz = sFromInteger (sing :: Sing 1)
sFromEnum SBum = sFromInteger (sing :: Sing 2)
instance SingI Bar where
sing = SBar
instance SingI Baz where
sing = SBaz
instance SingI Bum where
sing = SBum
instance SingI Q1 where
sing = SQ1
instance SingI Q2 where
sing = SQ2
Singletons/EnumDeriving.hs:0:0:: Splicing declarations
singEnumInstance ''Quux
======>
type family Case_0123456789876543210 n t where
Case_0123456789876543210 n True = Q2Sym0
Case_0123456789876543210 n False = Apply ErrorSym0 "toEnum: bad argument"
type family Case_0123456789876543210 n t where
Case_0123456789876543210 n True = Q1Sym0
Case_0123456789876543210 n False = Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 1))
type family ToEnum_0123456789876543210 (a :: GHC.Types.Nat) :: Quux where
ToEnum_0123456789876543210 n = Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 0))
type ToEnum_0123456789876543210Sym1 (t :: GHC.Types.Nat) =
ToEnum_0123456789876543210 t
instance SuppressUnusedWarnings ToEnum_0123456789876543210Sym0 where
suppressUnusedWarnings _
= snd
((GHC.Tuple.(,) ToEnum_0123456789876543210Sym0KindInference)
GHC.Tuple.())
data ToEnum_0123456789876543210Sym0 (l :: TyFun GHC.Types.Nat Quux)
= forall arg. SameKind (Apply ToEnum_0123456789876543210Sym0 arg) (ToEnum_0123456789876543210Sym1 arg) =>
ToEnum_0123456789876543210Sym0KindInference
type instance Apply ToEnum_0123456789876543210Sym0 l = ToEnum_0123456789876543210 l
type family FromEnum_0123456789876543210 (a :: Quux) :: GHC.Types.Nat where
FromEnum_0123456789876543210 Q1 = FromInteger 0
FromEnum_0123456789876543210 Q2 = FromInteger 1
type FromEnum_0123456789876543210Sym1 (t :: Quux) =
FromEnum_0123456789876543210 t
instance SuppressUnusedWarnings FromEnum_0123456789876543210Sym0 where
suppressUnusedWarnings _
= snd
((GHC.Tuple.(,) FromEnum_0123456789876543210Sym0KindInference)
GHC.Tuple.())
data FromEnum_0123456789876543210Sym0 (l :: TyFun Quux GHC.Types.Nat)
= forall arg. SameKind (Apply FromEnum_0123456789876543210Sym0 arg) (FromEnum_0123456789876543210Sym1 arg) =>
FromEnum_0123456789876543210Sym0KindInference
type instance Apply FromEnum_0123456789876543210Sym0 l = FromEnum_0123456789876543210 l
instance PEnum Quux where
type ToEnum (a :: GHC.Types.Nat) = Apply ToEnum_0123456789876543210Sym0 a
type FromEnum (a :: Quux) = Apply FromEnum_0123456789876543210Sym0 a
instance SEnum Quux where
sToEnum ::
forall (t :: GHC.Types.Nat).
Sing t
-> Sing (Apply (ToEnumSym0 :: TyFun GHC.Types.Nat Quux
-> GHC.Types.Type) t :: Quux)
sFromEnum ::
forall (t :: Quux).
Sing t
-> Sing (Apply (FromEnumSym0 :: TyFun Quux GHC.Types.Nat
-> GHC.Types.Type) t :: GHC.Types.Nat)
sToEnum (sN :: Sing n)
= case
(applySing ((applySing ((singFun2 @(:==$)) (%:==))) sN))
(sFromInteger (sing :: Sing 0))
of
STrue -> SQ1
SFalse
-> case
(applySing ((applySing ((singFun2 @(:==$)) (%:==))) sN))
(sFromInteger (sing :: Sing 1))
of
STrue -> SQ2
SFalse -> sError (sing :: Sing "toEnum: bad argument") ::
Sing (Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 1)) :: Quux) ::
Sing (Case_0123456789876543210 n (Apply (Apply (:==$) n) (FromInteger 0)) :: Quux)
sFromEnum SQ1 = sFromInteger (sing :: Sing 0)
sFromEnum SQ2 = sFromInteger (sing :: Sing 1)