module Language.PureScript.AST.Traversals where
import Data.Monoid (Monoid(..), mconcat)
import Control.Applicative
import Control.Monad
import Control.Arrow ((***), (+++))
import Language.PureScript.AST.Binders
import Language.PureScript.AST.Declarations
import Language.PureScript.Types
import Language.PureScript.Traversals
everywhereOnValues :: (Declaration -> Declaration) ->
(Expr -> Expr) ->
(Binder -> Binder) ->
(Declaration -> Declaration, Expr -> Expr, Binder -> Binder)
everywhereOnValues f g h = (f', g', h')
where
f' :: Declaration -> Declaration
f' (DataBindingGroupDeclaration ds) = f (DataBindingGroupDeclaration (map f' ds))
f' (ValueDeclaration name nameKind bs val) = f (ValueDeclaration name nameKind (map h' bs) ((map (g' *** g') +++ g') val))
f' (BindingGroupDeclaration ds) = f (BindingGroupDeclaration (map (\(name, nameKind, val) -> (name, nameKind, g' val)) ds))
f' (TypeClassDeclaration name args implies ds) = f (TypeClassDeclaration name args implies (map f' ds))
f' (TypeInstanceDeclaration name cs className args ds) = f (TypeInstanceDeclaration name cs className args (map f' ds))
f' (PositionedDeclaration pos d) = f (PositionedDeclaration pos (f' d))
f' other = f other
g' :: Expr -> Expr
g' (UnaryMinus v) = g (UnaryMinus (g' v))
g' (BinaryNoParens op v1 v2) = g (BinaryNoParens op (g' v1) (g' v2))
g' (Parens v) = g (Parens (g' v))
g' (ArrayLiteral vs) = g (ArrayLiteral (map g' vs))
g' (ObjectLiteral vs) = g (ObjectLiteral (map (fmap g') vs))
g' (TypeClassDictionaryConstructorApp name v) = g (TypeClassDictionaryConstructorApp name (g' v))
g' (Accessor prop v) = g (Accessor prop (g' v))
g' (ObjectUpdate obj vs) = g (ObjectUpdate (g' obj) (map (fmap g') vs))
g' (Abs name v) = g (Abs name (g' v))
g' (App v1 v2) = g (App (g' v1) (g' v2))
g' (IfThenElse v1 v2 v3) = g (IfThenElse (g' v1) (g' v2) (g' v3))
g' (Case vs alts) = g (Case (map g' vs) (map handleCaseAlternative alts))
g' (TypedValue check v ty) = g (TypedValue check (g' v) ty)
g' (Let ds v) = g (Let (map f' ds) (g' v))
g' (Do es) = g (Do (map handleDoNotationElement es))
g' (PositionedValue pos v) = g (PositionedValue pos (g' v))
g' other = g other
h' :: Binder -> Binder
h' (ConstructorBinder ctor bs) = h (ConstructorBinder ctor (map h' bs))
h' (ObjectBinder bs) = h (ObjectBinder (map (fmap h') bs))
h' (ArrayBinder bs) = h (ArrayBinder (map h' bs))
h' (ConsBinder b1 b2) = h (ConsBinder (h' b1) (h' b2))
h' (NamedBinder name b) = h (NamedBinder name (h' b))
h' (PositionedBinder pos b) = h (PositionedBinder pos (h' b))
h' other = h other
handleCaseAlternative :: CaseAlternative -> CaseAlternative
handleCaseAlternative ca =
ca { caseAlternativeBinders = map h' (caseAlternativeBinders ca)
, caseAlternativeResult = (map (g' *** g') +++ g') (caseAlternativeResult ca)
}
handleDoNotationElement :: DoNotationElement -> DoNotationElement
handleDoNotationElement (DoNotationValue v) = DoNotationValue (g' v)
handleDoNotationElement (DoNotationBind b v) = DoNotationBind (h' b) (g' v)
handleDoNotationElement (DoNotationLet ds) = DoNotationLet (map f' ds)
handleDoNotationElement (PositionedDoNotationElement pos e) = PositionedDoNotationElement pos (handleDoNotationElement e)
everywhereOnValuesTopDownM :: (Functor m, Applicative m, Monad m) =>
(Declaration -> m Declaration) ->
(Expr -> m Expr) ->
(Binder -> m Binder) ->
(Declaration -> m Declaration, Expr -> m Expr, Binder -> m Binder)
everywhereOnValuesTopDownM f g h = (f' <=< f, g' <=< g, h' <=< h)
where
f' (DataBindingGroupDeclaration ds) = DataBindingGroupDeclaration <$> mapM (f' <=< f) ds
f' (ValueDeclaration name nameKind bs val) = ValueDeclaration name nameKind <$> mapM (h' <=< h) bs <*> eitherM (mapM (pairM (g' <=< g) (g' <=< g))) (g' <=< g) val
f' (BindingGroupDeclaration ds) = BindingGroupDeclaration <$> mapM (\(name, nameKind, val) -> (,,) name nameKind <$> (g val >>= g')) ds
f' (TypeClassDeclaration name args implies ds) = TypeClassDeclaration name args implies <$> mapM (f' <=< f) ds
f' (TypeInstanceDeclaration name cs className args ds) = TypeInstanceDeclaration name cs className args <$> mapM (f' <=< f) ds
f' (PositionedDeclaration pos d) = PositionedDeclaration pos <$> (f d >>= f')
f' other = f other
g' (UnaryMinus v) = UnaryMinus <$> (g v >>= g')
g' (BinaryNoParens op v1 v2) = BinaryNoParens op <$> (g v1 >>= g') <*> (g v2 >>= g')
g' (Parens v) = Parens <$> (g v >>= g')
g' (ArrayLiteral vs) = ArrayLiteral <$> mapM (g' <=< g) vs
g' (ObjectLiteral vs) = ObjectLiteral <$> mapM (sndM (g' <=< g)) vs
g' (TypeClassDictionaryConstructorApp name v) = TypeClassDictionaryConstructorApp name <$> (g v >>= g')
g' (Accessor prop v) = Accessor prop <$> (g v >>= g')
g' (ObjectUpdate obj vs) = ObjectUpdate <$> (g obj >>= g') <*> mapM (sndM (g' <=< g)) vs
g' (Abs name v) = Abs name <$> (g v >>= g')
g' (App v1 v2) = App <$> (g v1 >>= g') <*> (g v2 >>= g')
g' (IfThenElse v1 v2 v3) = IfThenElse <$> (g v1 >>= g') <*> (g v2 >>= g') <*> (g v3 >>= g')
g' (Case vs alts) = Case <$> mapM (g' <=< g) vs <*> mapM handleCaseAlternative alts
g' (TypedValue check v ty) = TypedValue check <$> (g v >>= g') <*> pure ty
g' (Let ds v) = Let <$> mapM (f' <=< f) ds <*> (g v >>= g')
g' (Do es) = Do <$> mapM handleDoNotationElement es
g' (PositionedValue pos v) = PositionedValue pos <$> (g v >>= g')
g' other = g other
h' (ConstructorBinder ctor bs) = ConstructorBinder ctor <$> mapM (h' <=< h) bs
h' (ObjectBinder bs) = ObjectBinder <$> mapM (sndM (h' <=< h)) bs
h' (ArrayBinder bs) = ArrayBinder <$> mapM (h' <=< h) bs
h' (ConsBinder b1 b2) = ConsBinder <$> (h b1 >>= h') <*> (h b2 >>= h')
h' (NamedBinder name b) = NamedBinder name <$> (h b >>= h')
h' (PositionedBinder pos b) = PositionedBinder pos <$> (h b >>= h')
h' other = h other
handleCaseAlternative (CaseAlternative bs val) = CaseAlternative <$> mapM (h' <=< h) bs
<*> eitherM (mapM (pairM (g' <=< g) (g' <=< g))) (g' <=< g) val
handleDoNotationElement (DoNotationValue v) = DoNotationValue <$> (g' <=< g) v
handleDoNotationElement (DoNotationBind b v) = DoNotationBind <$> (h' <=< h) b <*> (g' <=< g) v
handleDoNotationElement (DoNotationLet ds) = DoNotationLet <$> mapM (f' <=< f) ds
handleDoNotationElement (PositionedDoNotationElement pos e) = PositionedDoNotationElement pos <$> handleDoNotationElement e
everywhereOnValuesM :: (Functor m, Applicative m, Monad m) =>
(Declaration -> m Declaration) ->
(Expr -> m Expr) ->
(Binder -> m Binder) ->
(Declaration -> m Declaration, Expr -> m Expr, Binder -> m Binder)
everywhereOnValuesM f g h = (f' <=< f, g' <=< g, h' <=< h)
where
f' (DataBindingGroupDeclaration ds) = (DataBindingGroupDeclaration <$> mapM f' ds) >>= f
f' (ValueDeclaration name nameKind bs val) = (ValueDeclaration name nameKind <$> mapM h' bs <*> eitherM (mapM (pairM g' g')) g' val) >>= f
f' (BindingGroupDeclaration ds) = (BindingGroupDeclaration <$> mapM (\(name, nameKind, val) -> (,,) name nameKind <$> g' val) ds) >>= f
f' (TypeClassDeclaration name args implies ds) = (TypeClassDeclaration name args implies <$> mapM f' ds) >>= f
f' (TypeInstanceDeclaration name cs className args ds) = (TypeInstanceDeclaration name cs className args <$> mapM f' ds) >>= f
f' (PositionedDeclaration pos d) = (PositionedDeclaration pos <$> f' d) >>= f
f' other = f other
g' (UnaryMinus v) = (UnaryMinus <$> g' v) >>= g
g' (BinaryNoParens op v1 v2) = (BinaryNoParens op <$> g' v1 <*> g' v2) >>= g
g' (Parens v) = (Parens <$> g' v) >>= g
g' (ArrayLiteral vs) = (ArrayLiteral <$> mapM g' vs) >>= g
g' (ObjectLiteral vs) = (ObjectLiteral <$> mapM (sndM g') vs) >>= g
g' (TypeClassDictionaryConstructorApp name v) = (TypeClassDictionaryConstructorApp name <$> g' v) >>= g
g' (Accessor prop v) = (Accessor prop <$> g' v) >>= g
g' (ObjectUpdate obj vs) = (ObjectUpdate <$> g' obj <*> mapM (sndM g') vs) >>= g
g' (Abs name v) = (Abs name <$> g' v) >>= g
g' (App v1 v2) = (App <$> g' v1 <*> g' v2) >>= g
g' (IfThenElse v1 v2 v3) = (IfThenElse <$> g' v1 <*> g' v2 <*> g' v3) >>= g
g' (Case vs alts) = (Case <$> mapM g' vs <*> mapM handleCaseAlternative alts) >>= g
g' (TypedValue check v ty) = (TypedValue check <$> g' v <*> pure ty) >>= g
g' (Let ds v) = (Let <$> mapM f' ds <*> g' v) >>= g
g' (Do es) = (Do <$> mapM handleDoNotationElement es) >>= g
g' (PositionedValue pos v) = (PositionedValue pos <$> g' v) >>= g
g' other = g other
h' (ConstructorBinder ctor bs) = (ConstructorBinder ctor <$> mapM h' bs) >>= h
h' (ObjectBinder bs) = (ObjectBinder <$> mapM (sndM h') bs) >>= h
h' (ArrayBinder bs) = (ArrayBinder <$> mapM h' bs) >>= h
h' (ConsBinder b1 b2) = (ConsBinder <$> h' b1 <*> h' b2) >>= h
h' (NamedBinder name b) = (NamedBinder name <$> h' b) >>= h
h' (PositionedBinder pos b) = (PositionedBinder pos <$> h' b) >>= h
h' other = h other
handleCaseAlternative (CaseAlternative bs val) = CaseAlternative <$> mapM h' bs
<*> eitherM (mapM (pairM g' g')) g' val
handleDoNotationElement (DoNotationValue v) = DoNotationValue <$> g' v
handleDoNotationElement (DoNotationBind b v) = DoNotationBind <$> h' b <*> g' v
handleDoNotationElement (DoNotationLet ds) = DoNotationLet <$> mapM f' ds
handleDoNotationElement (PositionedDoNotationElement pos e) = PositionedDoNotationElement pos <$> handleDoNotationElement e
everythingOnValues :: (r -> r -> r) ->
(Declaration -> r) ->
(Expr -> r) ->
(Binder -> r) ->
(CaseAlternative -> r) ->
(DoNotationElement -> r) ->
(Declaration -> r, Expr -> r, Binder -> r, CaseAlternative -> r, DoNotationElement -> r)
everythingOnValues (<>) f g h i j = (f', g', h', i', j')
where
f' d@(DataBindingGroupDeclaration ds) = foldl (<>) (f d) (map f' ds)
f' d@(ValueDeclaration _ _ bs (Right val)) = foldl (<>) (f d) (map h' bs) <> g' val
f' d@(ValueDeclaration _ _ bs (Left gs)) = foldl (<>) (f d) (map h' bs ++ concatMap (\(grd, val) -> [g' grd, g' val]) gs)
f' d@(BindingGroupDeclaration ds) = foldl (<>) (f d) (map (\(_, _, val) -> g' val) ds)
f' d@(TypeClassDeclaration _ _ _ ds) = foldl (<>) (f d) (map f' ds)
f' d@(TypeInstanceDeclaration _ _ _ _ ds) = foldl (<>) (f d) (map f' ds)
f' d@(PositionedDeclaration _ d1) = f d <> f' d1
f' d = f d
g' v@(UnaryMinus v1) = g v <> g' v1
g' v@(BinaryNoParens _ v1 v2) = g v <> g' v1 <> g' v2
g' v@(Parens v1) = g v <> g' v1
g' v@(ArrayLiteral vs) = foldl (<>) (g v) (map g' vs)
g' v@(ObjectLiteral vs) = foldl (<>) (g v) (map (g' . snd) vs)
g' v@(TypeClassDictionaryConstructorApp _ v1) = g v <> g' v1
g' v@(Accessor _ v1) = g v <> g' v1
g' v@(ObjectUpdate obj vs) = foldl (<>) (g v <> g' obj) (map (g' . snd) vs)
g' v@(Abs _ v1) = g v <> g' v1
g' v@(App v1 v2) = g v <> g' v1 <> g' v2
g' v@(IfThenElse v1 v2 v3) = g v <> g' v1 <> g' v2 <> g' v3
g' v@(Case vs alts) = foldl (<>) (foldl (<>) (g v) (map g' vs)) (map i' alts)
g' v@(TypedValue _ v1 _) = g v <> g' v1
g' v@(Let ds v1) = foldl (<>) (g v) (map f' ds) <> g' v1
g' v@(Do es) = foldl (<>) (g v) (map j' es)
g' v@(PositionedValue _ v1) = g v <> g' v1
g' v = g v
h' b@(ConstructorBinder _ bs) = foldl (<>) (h b) (map h' bs)
h' b@(ObjectBinder bs) = foldl (<>) (h b) (map (h' . snd) bs)
h' b@(ArrayBinder bs) = foldl (<>) (h b) (map h' bs)
h' b@(ConsBinder b1 b2) = h b <> h' b1 <> h' b2
h' b@(NamedBinder _ b1) = h b <> h' b1
h' b@(PositionedBinder _ b1) = h b <> h' b1
h' b = h b
i' ca@(CaseAlternative bs (Right val)) = foldl (<>) (i ca) (map h' bs) <> g' val
i' ca@(CaseAlternative bs (Left gs)) = foldl (<>) (i ca) (map h' bs ++ concatMap (\(grd, val) -> [g' grd, g' val]) gs)
j' e@(DoNotationValue v) = j e <> g' v
j' e@(DoNotationBind b v) = j e <> h' b <> g' v
j' e@(DoNotationLet ds) = foldl (<>) (j e) (map f' ds)
j' e@(PositionedDoNotationElement _ e1) = j e <> j' e1
everythingWithContextOnValues ::
s ->
r ->
(r -> r -> r) ->
(s -> Declaration -> (s, r)) ->
(s -> Expr -> (s, r)) ->
(s -> Binder -> (s, r)) ->
(s -> CaseAlternative -> (s, r)) ->
(s -> DoNotationElement -> (s, r)) ->
( Declaration -> r
, Expr -> r
, Binder -> r
, CaseAlternative -> r
, DoNotationElement -> r)
everythingWithContextOnValues s0 r0 (<>) f g h i j = (f'' s0, g'' s0, h'' s0, i'' s0, j'' s0)
where
f'' s d = let (s', r) = f s d in r <> f' s' d
f' s (DataBindingGroupDeclaration ds) = foldl (<>) r0 (map (f'' s) ds)
f' s (ValueDeclaration _ _ bs (Right val)) = foldl (<>) r0 (map (h'' s) bs) <> g'' s val
f' s (ValueDeclaration _ _ bs (Left gs)) = foldl (<>) r0 (map (h'' s) bs ++ concatMap (\(grd, val) -> [g'' s grd, g'' s val]) gs)
f' s (BindingGroupDeclaration ds) = foldl (<>) r0 (map (\(_, _, val) -> g'' s val) ds)
f' s (TypeClassDeclaration _ _ _ ds) = foldl (<>) r0 (map (f'' s) ds)
f' s (TypeInstanceDeclaration _ _ _ _ ds) = foldl (<>) r0 (map (f'' s) ds)
f' s (PositionedDeclaration _ d1) = f'' s d1
f' _ _ = r0
g'' s v = let (s', r) = g s v in r <> g' s' v
g' s (UnaryMinus v1) = g'' s v1
g' s (BinaryNoParens _ v1 v2) = g'' s v1 <> g'' s v2
g' s (Parens v1) = g'' s v1
g' s (ArrayLiteral vs) = foldl (<>) r0 (map (g'' s) vs)
g' s (ObjectLiteral vs) = foldl (<>) r0 (map (g'' s . snd) vs)
g' s (TypeClassDictionaryConstructorApp _ v1) = g'' s v1
g' s (Accessor _ v1) = g'' s v1
g' s (ObjectUpdate obj vs) = foldl (<>) (g'' s obj) (map (g'' s . snd) vs)
g' s (Abs _ v1) = g'' s v1
g' s (App v1 v2) = g'' s v1 <> g'' s v2
g' s (IfThenElse v1 v2 v3) = g'' s v1 <> g'' s v2 <> g'' s v3
g' s (Case vs alts) = foldl (<>) (foldl (<>) r0 (map (g'' s) vs)) (map (i'' s) alts)
g' s (TypedValue _ v1 _) = g'' s v1
g' s (Let ds v1) = foldl (<>) r0 (map (f'' s) ds) <> g'' s v1
g' s (Do es) = foldl (<>) r0 (map (j'' s) es)
g' s (PositionedValue _ v1) = g'' s v1
g' _ _ = r0
h'' s b = let (s', r) = h s b in r <> h' s' b
h' s (ConstructorBinder _ bs) = foldl (<>) r0 (map (h'' s) bs)
h' s (ObjectBinder bs) = foldl (<>) r0 (map (h'' s . snd) bs)
h' s (ArrayBinder bs) = foldl (<>) r0 (map (h'' s) bs)
h' s (ConsBinder b1 b2) = h'' s b1 <> h'' s b2
h' s (NamedBinder _ b1) = h'' s b1
h' s (PositionedBinder _ b1) = h'' s b1
h' _ _ = r0
i'' s ca = let (s', r) = i s ca in r <> i' s' ca
i' s (CaseAlternative bs (Right val)) = foldl (<>) r0 (map (h'' s) bs) <> g'' s val
i' s (CaseAlternative bs (Left gs)) = foldl (<>) r0 (map (h'' s) bs ++ concatMap (\(grd, val) -> [g'' s grd, g'' s val]) gs)
j'' s e = let (s', r) = j s e in r <> j' s' e
j' s (DoNotationValue v) = g'' s v
j' s (DoNotationBind b v) = h'' s b <> g'' s v
j' s (DoNotationLet ds) = foldl (<>) r0 (map (f'' s) ds)
j' s (PositionedDoNotationElement _ e1) = j'' s e1
everywhereWithContextOnValuesM :: (Functor m, Applicative m, Monad m) =>
s ->
(s -> Declaration -> m (s, Declaration)) ->
(s -> Expr -> m (s, Expr)) ->
(s -> Binder -> m (s, Binder)) ->
(s -> CaseAlternative -> m (s, CaseAlternative)) ->
(s -> DoNotationElement -> m (s, DoNotationElement)) ->
( Declaration -> m Declaration
, Expr -> m Expr
, Binder -> m Binder
, CaseAlternative -> m CaseAlternative
, DoNotationElement -> m DoNotationElement)
everywhereWithContextOnValuesM s0 f g h i j = (f'' s0, g'' s0, h'' s0, i'' s0, j'' s0)
where
f'' s = uncurry f' <=< f s
f' s (DataBindingGroupDeclaration ds) = DataBindingGroupDeclaration <$> mapM (f'' s) ds
f' s (ValueDeclaration name nameKind bs val) = ValueDeclaration name nameKind <$> mapM (h'' s) bs <*> eitherM (mapM (pairM (g'' s) (g'' s))) (g'' s) val
f' s (BindingGroupDeclaration ds) = BindingGroupDeclaration <$> mapM (thirdM (g'' s)) ds
f' s (TypeClassDeclaration name args implies ds) = TypeClassDeclaration name args implies <$> mapM (f'' s) ds
f' s (TypeInstanceDeclaration name cs className args ds) = TypeInstanceDeclaration name cs className args <$> mapM (f'' s) ds
f' s (PositionedDeclaration pos d1) = PositionedDeclaration pos <$> f'' s d1
f' _ other = return other
g'' s = uncurry g' <=< g s
g' s (UnaryMinus v) = UnaryMinus <$> g'' s v
g' s (BinaryNoParens op v1 v2) = BinaryNoParens op <$> g'' s v1 <*> g'' s v2
g' s (Parens v) = Parens <$> g'' s v
g' s (ArrayLiteral vs) = ArrayLiteral <$> mapM (g'' s) vs
g' s (ObjectLiteral vs) = ObjectLiteral <$> mapM (sndM (g'' s)) vs
g' s (TypeClassDictionaryConstructorApp name v) = TypeClassDictionaryConstructorApp name <$> g'' s v
g' s (Accessor prop v) = Accessor prop <$> g'' s v
g' s (ObjectUpdate obj vs) = ObjectUpdate <$> g'' s obj <*> mapM (sndM (g'' s)) vs
g' s (Abs name v) = Abs name <$> g'' s v
g' s (App v1 v2) = App <$> g'' s v1 <*> g'' s v2
g' s (IfThenElse v1 v2 v3) = IfThenElse <$> g'' s v1 <*> g'' s v2 <*> g'' s v3
g' s (Case vs alts) = Case <$> mapM (g'' s) vs <*> mapM (i'' s) alts
g' s (TypedValue check v ty) = TypedValue check <$> g'' s v <*> pure ty
g' s (Let ds v) = Let <$> mapM (f'' s) ds <*> g'' s v
g' s (Do es) = Do <$> mapM (j'' s) es
g' s (PositionedValue pos v) = PositionedValue pos <$> g'' s v
g' _ other = return other
h'' s = uncurry h' <=< h s
h' s (ConstructorBinder ctor bs) = ConstructorBinder ctor <$> mapM (h'' s) bs
h' s (ObjectBinder bs) = ObjectBinder <$> mapM (sndM (h'' s)) bs
h' s (ArrayBinder bs) = ArrayBinder <$> mapM (h'' s) bs
h' s (ConsBinder b1 b2) = ConsBinder <$> h'' s b1 <*> h'' s b2
h' s (NamedBinder name b) = NamedBinder name <$> h'' s b
h' s (PositionedBinder pos b) = PositionedBinder pos <$> h'' s b
h' _ other = return other
i'' s = uncurry i' <=< i s
i' s (CaseAlternative bs val) = CaseAlternative <$> mapM (h'' s) bs <*> eitherM (mapM (pairM (g'' s) (g'' s))) (g'' s) val
j'' s = uncurry j' <=< j s
j' s (DoNotationValue v) = DoNotationValue <$> g'' s v
j' s (DoNotationBind b v) = DoNotationBind <$> h'' s b <*> g'' s v
j' s (DoNotationLet ds) = DoNotationLet <$> mapM (f'' s) ds
j' s (PositionedDoNotationElement pos e1) = PositionedDoNotationElement pos <$> j'' s e1
accumTypes :: (Monoid r) => (Type -> r) -> (Declaration -> r, Expr -> r, Binder -> r, CaseAlternative -> r, DoNotationElement -> r)
accumTypes f = everythingOnValues mappend forDecls forValues (const mempty) (const mempty) (const mempty)
where
forDecls (DataDeclaration _ _ _ dctors) = mconcat (concatMap (map f . snd) dctors)
forDecls (ExternDeclaration _ _ _ ty) = f ty
forDecls (ExternInstanceDeclaration _ cs _ tys) = mconcat (concatMap (map f . snd) cs) `mappend` mconcat (map f tys)
forDecls (TypeClassDeclaration _ _ implies _) = mconcat (concatMap (map f . snd) implies)
forDecls (TypeInstanceDeclaration _ cs _ tys _) = mconcat (concatMap (map f . snd) cs) `mappend` mconcat (map f tys)
forDecls (TypeSynonymDeclaration _ _ ty) = f ty
forDecls (TypeDeclaration _ ty) = f ty
forDecls _ = mempty
forValues (TypeClassDictionary _ (_, cs) _) = mconcat (map f cs)
forValues (SuperClassDictionary _ tys) = mconcat (map f tys)
forValues (TypedValue _ _ ty) = f ty
forValues _ = mempty