PrimRep(..),
tyConPrimRep,
- AlgTyConRhs(..), visibleDataCons, AlgTyConParent(..),
+ AlgTyConRhs(..), visibleDataCons,
+ AlgTyConParent(..), hasParent,
SynTyConRhs(..),
isFunTyCon, isUnLiftedTyCon, isProductTyCon,
isRecursiveTyCon, newTyConRep, newTyConRhs, newTyConCo_maybe,
isHiBootTyCon, isSuperKindTyCon,
isCoercionTyCon_maybe, isCoercionTyCon,
+ isImplicitTyCon,
tcExpandTyCon_maybe, coreExpandTyCon_maybe,
#include "HsVersions.h"
-import {-# SOURCE #-} TypeRep ( Kind, Type, Coercion, PredType )
+import {-# SOURCE #-} TypeRep ( Kind, Type, PredType )
import {-# SOURCE #-} DataCon ( DataCon, isVanillaDataCon )
import Var ( TyVar, Id )
tyConTyVars :: [TyVar], -- Scopes over (a) the algTcStupidTheta
-- (b) the cached types in
-- algTyConRhs.NewTyCon
+ -- (c) the family instance
+ -- types if present
-- But not over the data constructors
tyConArgPoss :: Maybe [Int], -- for associated families: for each
tyConUnique :: Unique,
tyConName :: Name,
tyConArity :: Arity,
- coKindFun :: [Type] -> Kind
- }
+ coKindFun :: [Type] -> (Type,Type)
+ } -- INVARAINT: coKindFun is always applied to exactly 'arity' args
+ -- E.g. for trans (c1 :: ta=tb) (c2 :: tb=tc), the coKindFun returns
+ -- the kind as a pair of types: (ta,tc)
| SuperKindTyCon { -- Super Kinds, TY (box) and CO (diamond).
-- They have no kind; and arity zero
tyConName :: Name
}
-type KindCon = TyCon
-
-type SuperKindCon = TyCon
-
type FieldLabel = Name
data AlgTyConRhs
-- the representation type
-- with the type instance
+hasParent :: AlgTyConParent -> Bool
+hasParent NoParentTyCon = False
+hasParent _other = True
+
data SynTyConRhs
= OpenSynTyCon Kind -- Type family: *result* kind given
| SynonymTyCon Type -- Mentioning head type vars. Acts as a template for
isSuperKindTyCon (SuperKindTyCon {}) = True
isSuperKindTyCon other = False
-isCoercionTyCon_maybe :: TyCon -> Maybe (Arity, [Type] -> Kind)
+isCoercionTyCon_maybe :: TyCon -> Maybe (Arity, [Type] -> (Type,Type))
isCoercionTyCon_maybe (CoercionTyCon {tyConArity = ar, coKindFun = rule})
= Just (ar, rule)
isCoercionTyCon_maybe other = Nothing
+isCoercionTyCon :: TyCon -> Bool
isCoercionTyCon (CoercionTyCon {}) = True
isCoercionTyCon other = False
+
+isImplicitTyCon :: TyCon -> Bool
+isImplicitTyCon SynTyCon{} = False
+isImplicitTyCon AlgTyCon{algTcParent = parent} = hasParent parent
+isImplicitTyCon other = True
+ -- catches: FunTyCon, TupleTyCon, PrimTyCon,
+ -- CoercionTyCon, SuperKindTyCon
\end{code}