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{-# LANGUAGE PolyKinds, DataKinds, TypeOperators, TypeFamilies,
GADTs, PartialTypeSignatures #-}
module T13035 where
import Data.Kind
newtype MyAttr a b = MyAttr { _unMyAttr :: MyFun (a b) }
type MyRec a b = Rec (MyAttr a) b
type family MyFun (a :: k1) :: k2
data GY (a :: k1) (b :: k2) (c :: k1 -> k3) (d :: k1)
data GNone (a :: k1)
type family GYTF a where
GYTF (GY a b _ a) = b
GYTF (GY _ _ c d) = MyFun (c d)
type instance MyFun (GY a b c d) = GYTF (GY a b c d)
type family GNoneTF (a :: k1) :: k2 where
type instance MyFun (GNone a) = GNoneTF a
type (a :: k1) =: (b :: k2) = a `GY` b
type (a :: j1 -> j2) $ (b :: j1) = a b
infixr 0 $
infixr 9 =:
data FConst (a :: Type) (b :: Fields)
data FApply (a :: Type -> Type -> Type) b c (d :: Fields)
data FMap (a :: Type -> Type) b (d :: Fields)
type instance MyFun (FConst a b) = a
type instance MyFun (FApply b c d a) = b (MyFun (c a)) (MyFun (d a))
type instance MyFun (FMap b c a) = b (MyFun (c a))
data Fields = Name
| Author
| Image
| Description
| Ingredients
| Instructions
| CookTime
| PrepTime
| TotalTime
| Yield
| Nutrition
| Tags
| Url
| Section
| Items
| Subsections
| Calories
| Carbohydrates
| Cholesterol
| Fat
| Fiber
| Protien
| SaturatedFat
| Sodium
| Sugar
| TransFat
| UnsaturatedFat
| ServingSize
data Rec :: (u -> Type) -> [u] -> Type where
RNil :: Rec f '[]
(:&) :: !(f r) -> !(Rec f rs) -> Rec f (r ': rs)
data family Sing (a :: k)
data instance Sing (z_a6bn :: Fields)
= z_a6bn ~ Name => SName |
z_a6bn ~ Author => SAuthor |
z_a6bn ~ Image => SImage |
z_a6bn ~ Description => SDescription |
z_a6bn ~ Ingredients => SIngredients |
z_a6bn ~ Instructions => SInstructions |
z_a6bn ~ CookTime => SCookTime |
z_a6bn ~ PrepTime => SPrepTime |
z_a6bn ~ TotalTime => STotalTime |
z_a6bn ~ Yield => SYield |
z_a6bn ~ Nutrition => SNutrition |
z_a6bn ~ Tags => STags |
z_a6bn ~ Url => SUrl |
z_a6bn ~ Section => SSection |
z_a6bn ~ Items => SItems |
z_a6bn ~ Subsections => SSubsections |
z_a6bn ~ Calories => SCalories |
z_a6bn ~ Carbohydrates => SCarbohydrates |
z_a6bn ~ Cholesterol => SCholesterol |
z_a6bn ~ Fat => SFat |
z_a6bn ~ Fiber => SFiber |
z_a6bn ~ Protien => SProtien |
z_a6bn ~ SaturatedFat => SSaturatedFat |
z_a6bn ~ Sodium => SSodium |
z_a6bn ~ Sugar => SSugar |
z_a6bn ~ TransFat => STransFat |
z_a6bn ~ UnsaturatedFat => SUnsaturatedFat |
z_a6bn ~ ServingSize => SServingSize
(=::) :: sing f -> MyFun (a f) -> MyAttr a f
_ =:: x = MyAttr x
type NutritionT
= Calories =: Maybe Int
$ Carbohydrates =: Maybe Int
$ Cholesterol =: Maybe Int
$ Fat =: Maybe Int
$ Fiber =: Maybe Int
$ Protien =: Maybe Int
$ SaturatedFat =: Maybe Int
$ Sodium =: Maybe Int
$ Sugar =: Maybe Int
$ TransFat =: Maybe Int
$ UnsaturatedFat =: Maybe Int
$ ServingSize =: String
$ GNone
type NutritionRec = MyRec NutritionT ['Calories, 'Carbohydrates,
'Cholesterol, 'Fat, 'Fiber,
'Protien, 'SaturatedFat, 'Sodium,
'Sugar, 'TransFat, 'UnsaturatedFat,
'ServingSize]
type RecipeT
= Name =: String
$ Author =: String
$ Image =: String
$ Description =: String
$ CookTime =: Maybe Int
$ PrepTime =: Maybe Int
$ TotalTime =: Maybe Int
$ Yield =: String
$ Nutrition =: NutritionRec
$ Tags =: [String]
$ Url =: String
$ GNone
type RecipeFormatter = FApply (->) (FConst [String]) (FMap IO RecipeT)
g :: MyRec RecipeFormatter _ --'[ 'Author ] Uncomment to prevent loop
g = SAuthor =:: (\a -> return "Hi")
:& RNil
|
