@@ -9,7 +9,11 @@ module Control.Has
11import Control.Lens
11import Control.Lens
12+-- reexport all from Reader except Control.Monad etc
13+-- to correspond mtl-2.3+
12import Control.Monad.Reader as X
14import Control.Monad.Reader as X
15+ ( MonadReader(..), asks, Reader, runReader, mapReader, withReader
16+ , ReaderT(ReaderT), runReaderT, mapReaderT, withReaderT )
13import Data.Kind
17import Data.Kind
14import GHC.Generics as G
18import GHC.Generics as G
@@ -20,11 +24,11 @@ class Has x r where
20instance {-# OVERLAPS #-} Has r r where
24instance {-# OVERLAPS #-} Has r r where
23−type family HasAll (xs :: [*]) r :: Constraint where
27+type family HasAll (xs :: [Type]) r :: Constraint where
24 HasAll '[] r = ()
28 HasAll '[] r = ()
25 HasAll (x ': xs) r = (Has x r, HasAll xs r)
29 HasAll (x ': xs) r = (Has x r, HasAll xs r)
27−data LensList (r :: *) (es :: [*]) where
31+data LensList (r :: Type) (es :: [Type]) where
28 LLNil :: LensList r '[]
32 LLNil :: LensList r '[]
29 LLCons :: Lens r r e e -> LensList r es -> LensList r (e ': es)
33 LLCons :: Lens r r e e -> LensList r es -> LensList r (e ': es)
@@ -32,7 +36,7 @@ mapLL :: Lens s s r r -> LensList r es -> LensList s es
32mapLL _ LLNil = LLNil
36mapLL _ LLNil = LLNil
33mapLL m (LLCons l ls) = LLCons (m . l) (mapLL m ls)
37mapLL m (LLCons l ls) = LLCons (m . l) (mapLL m ls)
35−type family (xs :: [*]) ++ (ys :: [*]) :: [*] where
39+type family (xs :: [Type]) ++ (ys :: [Type]) :: [Type] where
36 '[] ++ ys = ys
40 '[] ++ ys = ys
37 (x ': xs) ++ ys = x ': (xs ++ ys)
41 (x ': xs) ++ ys = x ': (xs ++ ys)
@@ -43,7 +47,7 @@ concatLL (LLCons l ls) ys = LLCons l (concatLL ls ys)
43-- borrowed from Data.HSet.Get
47-- borrowed from Data.HSet.Get
44data N = Z | S N
48data N = Z | S N
46−type family IndexOf (x :: *) (xs :: [*]) :: N where
50+type family IndexOf (x :: Type) (xs :: [Type]) :: N where
47 IndexOf x (x ': _) = 'Z
51 IndexOf x (x ': _) = 'Z
48 IndexOf x (_ ': xs) = 'S (IndexOf x xs)
52 IndexOf x (_ ': xs) = 'S (IndexOf x xs)
@@ -52,8 +56,8 @@ class (i ~ IndexOf e es) => GetLens e es i | i es -> e where
53type Elem e es = GetLens e es (IndexOf e es)
57type Elem e es = GetLens e es (IndexOf e es)
55−class Fieldy (r :: *) where
59+class Fieldy (r :: Type) where
56− type Fields r :: [*]
60+ type Fields r :: [Type]
57 type Fields r = GFields (Rep r)
61 type Fields r = GFields (Rep r)
58 lensList :: LensList r (Fields r)
62 lensList :: LensList r (Fields r)
59 default lensList
63 default lensList
@@ -73,16 +77,16 @@ instance (GetLens e' es n, 'S n ~ IndexOf e' (e ': es))
73 => GetLens e' (e ': es) ('S n) where
77 => GetLens e' (e ': es) ('S n) where
74 getLens (LLCons _ ls) = getLens ls
78 getLens (LLCons _ ls) = getLens ls
76−class GFieldy (r :: * -> *) where
80+class GFieldy (r :: Type -> Type) where
77− type GFields r :: [*]
81+ type GFields r :: [Type]
78 glensList :: LensList (r x) (GFields r)
82 glensList :: LensList (r x) (GFields r)
80instance GFieldyProduct r => GFieldy (D1 d (C1 c r)) where
84instance GFieldyProduct r => GFieldy (D1 d (C1 c r)) where
81 type GFields (D1 d (C1 c r)) = GFieldsProduct r
85 type GFields (D1 d (C1 c r)) = GFieldsProduct r
82 glensList = mapLL (iso unM1 M1 . iso unM1 M1) glensListProduct
86 glensList = mapLL (iso unM1 M1 . iso unM1 M1) glensListProduct
84−class GFieldyProduct (r :: * -> *) where
88+class GFieldyProduct (r :: Type -> Type) where
85− type GFieldsProduct r :: [*]
89+ type GFieldsProduct r :: [Type]
86 glensListProduct :: LensList (r x) (GFieldsProduct r)
90 glensListProduct :: LensList (r x) (GFieldsProduct r)
88instance (GFieldyProduct r, GFieldyProduct s) => GFieldyProduct (r :*: s) where
92instance (GFieldyProduct r, GFieldyProduct s) => GFieldyProduct (r :*: s) where
@@ -101,7 +105,7 @@ instance GFieldyProduct (S1 s (K1 k r)) where
101 type GFieldsProduct (S1 s (K1 k r)) = '[r]
105 type GFieldsProduct (S1 s (K1 k r)) = '[r]
102 glensListProduct = LLCons (iso unM1 M1 . iso unK1 K1) LLNil
106 glensListProduct = LLCons (iso unM1 M1 . iso unK1 K1) LLNil
104−type family AllElem (xs :: [*]) (es :: [*]) :: Constraint where
108+type family AllElem (xs :: [Type]) (es :: [Type]) :: Constraint where
105 AllElem '[] _ = ()
109 AllElem '[] _ = ()
106 AllElem (x ': xs) es = (Elem x es, AllElem xs es)
110 AllElem (x ': xs) es = (Elem x es, AllElem xs es)