\begin{code}
module TcType (
--------------------------------
- -- TyThing
- TyThing(..), -- instance NamedThing
-
- --------------------------------
-- Types
TcType, TcSigmaType, TcRhoType, TcTauType, TcPredType, TcThetaType,
TcTyVar, TcTyVarSet, TcKind,
---------------------------------
-- Misc type manipulators
- deNoteType, classNamesOfTheta,
+ deNoteType, classesOfTheta,
tyClsNamesOfType, tyClsNamesOfDFunHead,
getDFunTyKey,
---------------------------------
-- Predicate types
getClassPredTys_maybe, getClassPredTys,
- isPredTy, isClassPred, isTyVarClassPred,
+ isClassPred, isTyVarClassPred,
mkDictTy, tcSplitPredTy_maybe,
- isDictTy, tcSplitDFunTy, predTyUnique,
+ isPredTy, isDictTy, tcSplitDFunTy, predTyUnique,
mkClassPred, isInheritablePred, isLinearPred, isIPPred, mkPredName,
---------------------------------
Kind, -- Stuff to do with kinds is insensitive to pre/post Tc
unliftedTypeKind, liftedTypeKind, openTypeKind, mkArrowKind, mkArrowKinds,
superBoxity, liftedBoxity, hasMoreBoxityInfo, defaultKind, superKind,
- isTypeKind, isAnyTypeKind,
+ isTypeKind, isAnyTypeKind, typeCon,
- Type, SourceType(..), PredType, ThetaType,
+ Type, PredType(..), ThetaType,
mkForAllTy, mkForAllTys,
mkFunTy, mkFunTys, zipFunTys,
mkTyConApp, mkGenTyConApp, mkAppTy, mkAppTys, mkSynTy, applyTy, applyTys,
isUnLiftedType, -- Source types are always lifted
isUnboxedTupleType, -- Ditto
- isPrimitiveType, isTyVarTy,
+ isPrimitiveType,
tidyTopType, tidyType, tidyPred, tidyTypes, tidyFreeTyVars, tidyOpenType, tidyOpenTypes,
tidyTyVarBndr, tidyOpenTyVar, tidyOpenTyVars,
import Type ( -- Re-exports
tyVarsOfType, tyVarsOfTypes, tyVarsOfPred,
- tyVarsOfTheta, Kind, Type, SourceType(..),
- PredType, ThetaType, unliftedTypeKind,
+ tyVarsOfTheta, Kind, Type, PredType(..),
+ ThetaType, unliftedTypeKind, typeCon,
liftedTypeKind, openTypeKind, mkArrowKind,
mkArrowKinds, mkForAllTy, mkForAllTys,
defaultKind, isTypeKind, isAnyTypeKind,
mkTyConApp, mkGenTyConApp, mkAppTy,
mkAppTys, mkSynTy, applyTy, applyTys,
mkTyVarTy, mkTyVarTys, mkTyConTy, mkPredTy,
- mkPredTys, isUnLiftedType,
+ mkPredTys, isUnLiftedType,
isUnboxedTupleType, isPrimitiveType,
splitTyConApp_maybe,
tidyTopType, tidyType, tidyPred, tidyTypes,
hasMoreBoxityInfo, liftedBoxity,
superBoxity, typeKind, superKind, repType
)
-import DataCon ( DataCon )
import TyCon ( TyCon, isUnLiftedTyCon, tyConUnique )
-import Class ( classHasFDs, Class )
-import Var ( TyVar, Id, tyVarKind, isMutTyVar, mutTyVarDetails )
+import Class ( Class )
+import Var ( TyVar, tyVarKind, isMutTyVar, mutTyVarDetails )
import ForeignCall ( Safety, playSafe
, DNType(..)
)
-- others:
import CmdLineOpts ( DynFlags, DynFlag( Opt_GlasgowExts ), dopt )
import Name ( Name, NamedThing(..), mkInternalName, getSrcLoc )
-import OccName ( OccName, mkDictOcc )
import NameSet
+import OccName ( OccName, mkDictOcc )
import PrelNames -- Lots (e.g. in isFFIArgumentTy)
import TysWiredIn ( unitTyCon, charTyCon, listTyCon )
import BasicTypes ( IPName(..), ipNameName )
%************************************************************************
%* *
- TyThing
-%* *
-%************************************************************************
-
-\begin{code}
-data TyThing = AnId Id
- | ADataCon DataCon
- | ATyCon TyCon
- | AClass Class
-
-instance NamedThing TyThing where
- getName (AnId id) = getName id
- getName (ATyCon tc) = getName tc
- getName (AClass cl) = getName cl
- getName (ADataCon dc) = getName dc
-\end{code}
-
-
-%************************************************************************
-%* *
\subsection{Types}
%* *
%************************************************************************
-- In all cases, a (saturated) type synonym application is legal,
-- provided it expands to the required form.
-
-\begin{code}
-type SigmaType = Type
-type RhoType = Type
-type TauType = Type
-\end{code}
-
\begin{code}
type TcTyVar = TyVar -- Might be a mutable tyvar
type TcTyVarSet = TyVarSet
\begin{code}
mkSigmaTy tyvars theta tau = mkForAllTys tyvars (mkPhiTy theta tau)
-mkPhiTy :: [SourceType] -> Type -> Type
+mkPhiTy :: [PredType] -> Type -> Type
mkPhiTy theta ty = foldr (\p r -> FunTy (mkPredTy p) r) ty theta
\end{code}
-
@isTauTy@ tests for nested for-alls.
\begin{code}
isTauTy :: Type -> Bool
isTauTy (TyVarTy v) = True
isTauTy (TyConApp _ tys) = all isTauTy tys
+isTauTy (NewTcApp _ tys) = all isTauTy tys
isTauTy (AppTy a b) = isTauTy a && isTauTy b
isTauTy (FunTy a b) = isTauTy a && isTauTy b
-isTauTy (SourceTy p) = True -- Don't look through source types
+isTauTy (PredTy p) = True -- Don't look through source types
isTauTy (NoteTy _ ty) = isTauTy ty
isTauTy other = False
\end{code}
\begin{code}
getDFunTyKey :: Type -> OccName -- Get some string from a type, to be used to
-- construct a dictionary function name
-getDFunTyKey (TyVarTy tv) = getOccName tv
-getDFunTyKey (TyConApp tc _) = getOccName tc
-getDFunTyKey (AppTy fun _) = getDFunTyKey fun
-getDFunTyKey (NoteTy _ t) = getDFunTyKey t
-getDFunTyKey (FunTy arg _) = getOccName funTyCon
-getDFunTyKey (ForAllTy _ t) = getDFunTyKey t
-getDFunTyKey (SourceTy (NType tc _)) = getOccName tc -- Newtypes are quite reasonable
-getDFunTyKey ty = pprPanic "getDFunTyKey" (pprType ty)
--- SourceTy shouldn't happen
+getDFunTyKey (TyVarTy tv) = getOccName tv
+getDFunTyKey (TyConApp tc _) = getOccName tc
+getDFunTyKey (NewTcApp tc _) = getOccName tc
+getDFunTyKey (AppTy fun _) = getDFunTyKey fun
+getDFunTyKey (NoteTy _ t) = getDFunTyKey t
+getDFunTyKey (FunTy arg _) = getOccName funTyCon
+getDFunTyKey (ForAllTy _ t) = getDFunTyKey t
+getDFunTyKey ty = pprPanic "getDFunTyKey" (pprType ty)
+-- PredTy shouldn't happen
\end{code}
Nothing -> pprPanic "tcSplitTyConApp" (pprType ty)
tcSplitTyConApp_maybe :: Type -> Maybe (TyCon, [Type])
-tcSplitTyConApp_maybe (TyConApp tc tys) = Just (tc, tys)
-tcSplitTyConApp_maybe (FunTy arg res) = Just (funTyCon, [arg,res])
-tcSplitTyConApp_maybe (NoteTy n ty) = tcSplitTyConApp_maybe ty
-tcSplitTyConApp_maybe (SourceTy (NType tc tys)) = Just (tc,tys)
+tcSplitTyConApp_maybe (TyConApp tc tys) = Just (tc, tys)
+tcSplitTyConApp_maybe (NewTcApp tc tys) = Just (tc, tys)
+tcSplitTyConApp_maybe (FunTy arg res) = Just (funTyCon, [arg,res])
+tcSplitTyConApp_maybe (NoteTy n ty) = tcSplitTyConApp_maybe ty
-- Newtypes are opaque, so they may be split
-- However, predicates are not treated
-- as tycon applications by the type checker
tcSplitAppTy_maybe :: Type -> Maybe (Type, Type)
-tcSplitAppTy_maybe (FunTy ty1 ty2) = Just (TyConApp funTyCon [ty1], ty2)
-tcSplitAppTy_maybe (AppTy ty1 ty2) = Just (ty1, ty2)
-tcSplitAppTy_maybe (NoteTy n ty) = tcSplitAppTy_maybe ty
-tcSplitAppTy_maybe (SourceTy (NType tc tys)) = tc_split_app tc tys --- Don't forget that newtype!
-tcSplitAppTy_maybe (TyConApp tc tys) = tc_split_app tc tys
-tcSplitAppTy_maybe other = Nothing
-
-tc_split_app tc tys = case snocView tys of
- Just (tys',ty') -> Just (TyConApp tc tys', ty')
- Nothing -> Nothing
+tcSplitAppTy_maybe (FunTy ty1 ty2) = Just (TyConApp funTyCon [ty1], ty2)
+tcSplitAppTy_maybe (AppTy ty1 ty2) = Just (ty1, ty2)
+tcSplitAppTy_maybe (NoteTy n ty) = tcSplitAppTy_maybe ty
+tcSplitAppTy_maybe (TyConApp tc tys) = case snocView tys of
+ Just (tys', ty') -> Just (TyConApp tc tys', ty')
+ Nothing -> Nothing
+tcSplitAppTy_maybe (NewTcApp tc tys) = case snocView tys of
+ Just (tys', ty') -> Just (NewTcApp tc tys', ty')
+ Nothing -> Nothing
+tcSplitAppTy_maybe other = Nothing
tcSplitAppTy ty = case tcSplitAppTy_maybe ty of
Just stuff -> stuff
split (NoteTy n ty) = split ty
split _ = panic "splitMethodTy"
-tcSplitDFunTy :: Type -> ([TyVar], [SourceType], Class, [Type])
+tcSplitDFunTy :: Type -> ([TyVar], [PredType], Class, [Type])
-- Split the type of a dictionary function
tcSplitDFunTy ty
= case tcSplitSigmaTy ty of { (tvs, theta, tau) ->
%* *
%************************************************************************
-"Predicates" are particular source types, namelyClassP or IParams
-
\begin{code}
-isPred :: SourceType -> Bool
-isPred (ClassP _ _) = True
-isPred (IParam _ _) = True
-isPred (NType _ _) = False
-
-isPredTy :: Type -> Bool
-isPredTy (NoteTy _ ty) = isPredTy ty
-isPredTy (SourceTy sty) = isPred sty
-isPredTy _ = False
-
tcSplitPredTy_maybe :: Type -> Maybe PredType
-- Returns Just for predicates only
-tcSplitPredTy_maybe (NoteTy _ ty) = tcSplitPredTy_maybe ty
-tcSplitPredTy_maybe (SourceTy p) | isPred p = Just p
-tcSplitPredTy_maybe other = Nothing
+tcSplitPredTy_maybe (NoteTy _ ty) = tcSplitPredTy_maybe ty
+tcSplitPredTy_maybe (PredTy p) = Just p
+tcSplitPredTy_maybe other = Nothing
predTyUnique :: PredType -> Unique
predTyUnique (IParam n _) = getUnique (ipNameName n)
predTyUnique (ClassP clas tys) = getUnique clas
-mkPredName :: Unique -> SrcLoc -> SourceType -> Name
+mkPredName :: Unique -> SrcLoc -> PredType -> Name
mkPredName uniq loc (ClassP cls tys) = mkInternalName uniq (mkDictOcc (getOccName cls)) loc
mkPredName uniq loc (IParam ip ty) = mkInternalName uniq (getOccName (ipNameName ip)) loc
\end{code}
\begin{code}
mkClassPred clas tys = ClassP clas tys
-isClassPred :: SourceType -> Bool
+isClassPred :: PredType -> Bool
isClassPred (ClassP clas tys) = True
isClassPred other = False
isTyVarClassPred (ClassP clas tys) = all tcIsTyVarTy tys
isTyVarClassPred other = False
-getClassPredTys_maybe :: SourceType -> Maybe (Class, [Type])
+getClassPredTys_maybe :: PredType -> Maybe (Class, [Type])
getClassPredTys_maybe (ClassP clas tys) = Just (clas, tys)
getClassPredTys_maybe _ = Nothing
mkDictTy clas tys = mkPredTy (ClassP clas tys)
isDictTy :: Type -> Bool
-isDictTy (SourceTy p) = isClassPred p
+isDictTy (PredTy p) = isClassPred p
isDictTy (NoteTy _ ty) = isDictTy ty
isDictTy other = False
\end{code}
--------------------- Implicit parameters ---------------------------------
\begin{code}
-isIPPred :: SourceType -> Bool
+isIPPred :: PredType -> Bool
isIPPred (IParam _ _) = True
isIPPred other = False
%************************************************************************
Comparison, taking note of newtypes, predicates, etc,
-But ignoring usage types
\begin{code}
tcEqType :: Type -> Type -> Bool
tcCmpTypes tys1 tys2 = cmpTys emptyVarEnv tys1 tys2
-tcCmpPred p1 p2 = cmpSourceTy emptyVarEnv p1 p2
+tcCmpPred p1 p2 = cmpPredTy emptyVarEnv p1 p2
-------------
cmpTys env tys1 tys2 = cmpList (cmpTy env) tys1 tys2
Just tv1a -> tv1a `compare` tv2
Nothing -> tv1 `compare` tv2
-cmpTy env (SourceTy p1) (SourceTy p2) = cmpSourceTy env p1 p2
+cmpTy env (PredTy p1) (PredTy p2) = cmpPredTy env p1 p2
cmpTy env (AppTy f1 a1) (AppTy f2 a2) = cmpTy env f1 f2 `thenCmp` cmpTy env a1 a2
cmpTy env (FunTy f1 a1) (FunTy f2 a2) = cmpTy env f1 f2 `thenCmp` cmpTy env a1 a2
cmpTy env (TyConApp tc1 tys1) (TyConApp tc2 tys2) = (tc1 `compare` tc2) `thenCmp` (cmpTys env tys1 tys2)
+cmpTy env (NewTcApp tc1 tys1) (NewTcApp tc2 tys2) = (tc1 `compare` tc2) `thenCmp` (cmpTys env tys1 tys2)
cmpTy env (ForAllTy tv1 t1) (ForAllTy tv2 t2) = cmpTy (extendVarEnv env tv1 tv2) t1 t2
- -- Deal with the rest: TyVarTy < AppTy < FunTy < TyConApp < ForAllTy < SourceTy
+ -- Deal with the rest: TyVarTy < AppTy < FunTy < TyConApp < NewTcApp < ForAllTy < PredTy
cmpTy env (AppTy _ _) (TyVarTy _) = GT
cmpTy env (FunTy _ _) (TyVarTy _) = GT
cmpTy env (TyConApp _ _) (AppTy _ _) = GT
cmpTy env (TyConApp _ _) (FunTy _ _) = GT
+cmpTy env (NewTcApp _ _) (TyVarTy _) = GT
+cmpTy env (NewTcApp _ _) (AppTy _ _) = GT
+cmpTy env (NewTcApp _ _) (FunTy _ _) = GT
+cmpTy env (NewTcApp _ _) (TyConApp _ _) = GT
+
cmpTy env (ForAllTy _ _) (TyVarTy _) = GT
cmpTy env (ForAllTy _ _) (AppTy _ _) = GT
cmpTy env (ForAllTy _ _) (FunTy _ _) = GT
cmpTy env (ForAllTy _ _) (TyConApp _ _) = GT
+cmpTy env (ForAllTy _ _) (NewTcApp _ _) = GT
-cmpTy env (SourceTy _) t2 = GT
+cmpTy env (PredTy _) t2 = GT
cmpTy env _ _ = LT
\end{code}
\begin{code}
-cmpSourceTy :: TyVarEnv TyVar -> SourceType -> SourceType -> Ordering
-cmpSourceTy env (IParam n1 ty1) (IParam n2 ty2) = (n1 `compare` n2) `thenCmp` (cmpTy env ty1 ty2)
+cmpPredTy :: TyVarEnv TyVar -> PredType -> PredType -> Ordering
+cmpPredTy env (IParam n1 ty1) (IParam n2 ty2) = (n1 `compare` n2) `thenCmp` (cmpTy env ty1 ty2)
-- Compare types as well as names for implicit parameters
-- This comparison is used exclusively (I think) for the
-- finite map built in TcSimplify
-cmpSourceTy env (IParam _ _) sty = LT
-
-cmpSourceTy env (ClassP _ _) (IParam _ _) = GT
-cmpSourceTy env (ClassP c1 tys1) (ClassP c2 tys2) = (c1 `compare` c2) `thenCmp` (cmpTys env tys1 tys2)
-cmpSourceTy env (ClassP _ _) (NType _ _) = LT
-
-cmpSourceTy env (NType tc1 tys1) (NType tc2 tys2) = (tc1 `compare` tc2) `thenCmp` (cmpTys env tys1 tys2)
-cmpSourceTy env (NType _ _) sty = GT
+cmpPredTy env (IParam _ _) (ClassP _ _) = LT
+cmpPredTy env (ClassP _ _) (IParam _ _) = GT
+cmpPredTy env (ClassP c1 tys1) (ClassP c2 tys2) = (c1 `compare` c2) `thenCmp` (cmpTys env tys1 tys2)
\end{code}
PredTypes are used as a FM key in TcSimplify,
so we take the easy path and make them an instance of Ord
\begin{code}
-instance Eq SourceType where { (==) = tcEqPred }
-instance Ord SourceType where { compare = tcCmpPred }
+instance Eq PredType where { (==) = tcEqPred }
+instance Ord PredType where { compare = tcCmpPred }
\end{code}
isOverloadedTy (FunTy a b) = isPredTy a
isOverloadedTy (NoteTy n ty) = isOverloadedTy ty
isOverloadedTy _ = False
+
+isPredTy :: Type -> Bool -- Belongs in TcType because it does
+ -- not look through newtypes, or predtypes (of course)
+isPredTy (NoteTy _ ty) = isPredTy ty
+isPredTy (PredTy sty) = True
+isPredTy _ = False
\end{code}
\begin{code}
\begin{code}
deNoteType :: Type -> Type
- -- Remove synonyms, but not source types
+ -- Remove synonyms, but not predicate types
deNoteType ty@(TyVarTy tyvar) = ty
deNoteType (TyConApp tycon tys) = TyConApp tycon (map deNoteType tys)
-deNoteType (SourceTy p) = SourceTy (deNoteSourceType p)
+deNoteType (NewTcApp tycon tys) = NewTcApp tycon (map deNoteType tys)
+deNoteType (PredTy p) = PredTy (deNotePredType p)
deNoteType (NoteTy _ ty) = deNoteType ty
deNoteType (AppTy fun arg) = AppTy (deNoteType fun) (deNoteType arg)
deNoteType (FunTy fun arg) = FunTy (deNoteType fun) (deNoteType arg)
deNoteType (ForAllTy tv ty) = ForAllTy tv (deNoteType ty)
-deNoteSourceType :: SourceType -> SourceType
-deNoteSourceType (ClassP c tys) = ClassP c (map deNoteType tys)
-deNoteSourceType (IParam n ty) = IParam n (deNoteType ty)
-deNoteSourceType (NType tc tys) = NType tc (map deNoteType tys)
+deNotePredType :: PredType -> PredType
+deNotePredType (ClassP c tys) = ClassP c (map deNoteType tys)
+deNotePredType (IParam n ty) = IParam n (deNoteType ty)
\end{code}
Find the free tycons and classes of a type. This is used in the front
tyClsNamesOfType :: Type -> NameSet
tyClsNamesOfType (TyVarTy tv) = emptyNameSet
tyClsNamesOfType (TyConApp tycon tys) = unitNameSet (getName tycon) `unionNameSets` tyClsNamesOfTypes tys
+tyClsNamesOfType (NewTcApp tycon tys) = unitNameSet (getName tycon) `unionNameSets` tyClsNamesOfTypes tys
tyClsNamesOfType (NoteTy (SynNote ty1) ty2) = tyClsNamesOfType ty1
tyClsNamesOfType (NoteTy other_note ty2) = tyClsNamesOfType ty2
-tyClsNamesOfType (SourceTy (IParam n ty)) = tyClsNamesOfType ty
-tyClsNamesOfType (SourceTy (ClassP cl tys)) = unitNameSet (getName cl) `unionNameSets` tyClsNamesOfTypes tys
-tyClsNamesOfType (SourceTy (NType tc tys)) = unitNameSet (getName tc) `unionNameSets` tyClsNamesOfTypes tys
+tyClsNamesOfType (PredTy (IParam n ty)) = tyClsNamesOfType ty
+tyClsNamesOfType (PredTy (ClassP cl tys)) = unitNameSet (getName cl) `unionNameSets` tyClsNamesOfTypes tys
tyClsNamesOfType (FunTy arg res) = tyClsNamesOfType arg `unionNameSets` tyClsNamesOfType res
tyClsNamesOfType (AppTy fun arg) = tyClsNamesOfType fun `unionNameSets` tyClsNamesOfType arg
tyClsNamesOfType (ForAllTy tyvar ty) = tyClsNamesOfType ty
= case tcSplitSigmaTy dfun_ty of
(tvs,_,head_ty) -> tyClsNamesOfType head_ty
-classNamesOfTheta :: ThetaType -> [Name]
+classesOfTheta :: ThetaType -> [Class]
-- Looks just for ClassP things; maybe it should check
-classNamesOfTheta preds = [ getName c | ClassP c _ <- preds ]
+classesOfTheta preds = [ c | ClassP c _ <- preds ]
\end{code}
= uVarX tyvar2 ty1 k subst
-- Predicates
-uTysX (SourceTy (IParam n1 t1)) (SourceTy (IParam n2 t2)) k subst
+uTysX (PredTy (IParam n1 t1)) (PredTy (IParam n2 t2)) k subst
| n1 == n2 = uTysX t1 t2 k subst
-uTysX (SourceTy (ClassP c1 tys1)) (SourceTy (ClassP c2 tys2)) k subst
+uTysX (PredTy (ClassP c1 tys1)) (PredTy (ClassP c2 tys2)) k subst
| c1 == c2 = uTyListsX tys1 tys2 k subst
-uTysX (SourceTy (NType tc1 tys1)) (SourceTy (NType tc2 tys2)) k subst
- | tc1 == tc2 = uTyListsX tys1 tys2 k subst
-- Functions; just check the two parts
uTysX (FunTy fun1 arg1) (FunTy fun2 arg2) k subst
= uTysX fun1 fun2 (uTysX arg1 arg2 k) subst
-- Type constructors must match
+uTysX (NewTcApp tc1 tys1) (NewTcApp tc2 tys2) k subst
+ | tc1 == tc2 = uTyListsX tys1 tys2 k subst
uTysX (TyConApp con1 tys1) (TyConApp con2 tys2) k subst
| (con1 == con2 && equalLength tys1 tys2)
= uTyListsX tys1 tys2 k subst
-- expect, due to an intervening Note. KSW 2000-06.
-- Predicates
-match (SourceTy (IParam n1 t1)) (SourceTy (IParam n2 t2)) tmpls k senv
+match (PredTy (IParam n1 t1)) (PredTy (IParam n2 t2)) tmpls k senv
| n1 == n2 = match t1 t2 tmpls k senv
-match (SourceTy (ClassP c1 tys1)) (SourceTy (ClassP c2 tys2)) tmpls k senv
+match (PredTy (ClassP c1 tys1)) (PredTy (ClassP c2 tys2)) tmpls k senv
| c1 == c2 = match_list_exactly tys1 tys2 tmpls k senv
-match (SourceTy (NType tc1 tys1)) (SourceTy (NType tc2 tys2)) tmpls k senv
- | tc1 == tc2 = match_list_exactly tys1 tys2 tmpls k senv
-- Functions; just check the two parts
match (FunTy arg1 res1) (FunTy arg2 res2) tmpls k senv
Just (fun2,arg2) -> match fun1 fun2 tmpls (match arg1 arg2 tmpls k) senv
Nothing -> Nothing -- Fail
-match (TyConApp tc1 tys1) (TyConApp tc2 tys2) tmpls k senv
+-- Newtypes are opaque; predicate types should not happen
+match (NewTcApp tc1 tys1) (NewTcApp tc2 tys2) tmpls k senv
| tc1 == tc2 = match_list_exactly tys1 tys2 tmpls k senv
-
--- Newtypes are opaque; other source types should not happen
-match (SourceTy (NType tc1 tys1)) (SourceTy (NType tc2 tys2)) tmpls k senv
+match (TyConApp tc1 tys1) (TyConApp tc2 tys2) tmpls k senv
| tc1 == tc2 = match_list_exactly tys1 tys2 tmpls k senv
-- With type synonyms, we have to be careful for the exact
projects / ghc-hetmet.git / blobdiff