import TcMonad
import TcEnv ( tcLookupTyVar, tcLookupClass, tcLookupTyCon,
- tcExtendTyVarEnv, tcTyVarScope
+ tcTyVarScope, tcTyVarScopeGivenKinds
)
import TcKind ( TcKind, mkTcTypeKind, mkBoxedTypeKind,
mkTcArrowKind, unifyKind, newKindVar,
kindToTcKind
)
-import ErrUtils ( arityErr )
import Type ( GenType, Type(..), ThetaType(..),
- mkTyVarTy, mkTyConTy, mkFunTy, mkAppTy,
+ mkTyVarTy, mkTyConTy, mkFunTy, mkAppTy, mkSynTy,
mkSigmaTy
)
import TyVar ( GenTyVar, TyVar(..), mkTyVar )
import PrelInfo ( mkListTy, mkTupleTy )
import Type ( mkDictTy )
import Class ( cCallishClassKeys )
+import TyCon ( TyCon, Arity(..) )
import Unique ( Unique )
import Name ( Name(..), getNameShortName, isTyConName, getSynNameArity )
import PprStyle
tcMonoType ty2 `thenTc` \ tau_ty2 ->
returnTc (mkTcTypeKind, mkFunTy tau_ty1 tau_ty2)
-tcMonoTypeKind (MonoTyApp name tys)
- = mapAndUnzipTc tcMonoTypeKind tys `thenTc` \ (arg_kinds, arg_tys) ->
-
- tc_mono_name name `thenNF_Tc` \ (fun_kind, fun_ty) ->
-
- newKindVar `thenNF_Tc` \ result_kind ->
- unifyKind fun_kind (foldr mkTcArrowKind result_kind arg_kinds) `thenTc_`
-
- -- Check for saturated application in the special case of
- -- type synoyms. Here the renamer has kindly attached the
- -- arity to the Name.
- synArityCheck name (length tys) `thenTc_`
-
- returnTc (result_kind, foldl mkAppTy fun_ty arg_tys)
+tcMonoTypeKind (MonoTyApp name@(Short _ _) tys)
+ = -- Must be a type variable
+ tcLookupTyVar name `thenNF_Tc` \ (kind,tyvar) ->
+ tcMonoTyApp kind (mkTyVarTy tyvar) tys
+tcMonoTypeKind (MonoTyApp name tys)
+ | isTyConName name -- Must be a type constructor
+ = tcLookupTyCon name `thenNF_Tc` \ (kind,maybe_arity,tycon) ->
+ case maybe_arity of
+ Just arity -> tcSynApp name kind arity tycon tys -- synonum
+ Nothing -> tcMonoTyApp kind (mkTyConTy tycon) tys -- newtype or data
+
-- for unfoldings only:
tcMonoTypeKind (MonoForAllTy tyvars_w_kinds ty)
- = tcExtendTyVarEnv tyvar_names (tc_kinds `zip` tyvars) (
+ = tcTyVarScopeGivenKinds names tc_kinds (\ tyvars ->
tcMonoTypeKind ty `thenTc` \ (kind, ty') ->
unifyKind kind mkTcTypeKind `thenTc_`
returnTc (mkTcTypeKind, ty')
)
where
- (tyvar_names, kinds) = unzip tyvars_w_kinds
- tyvars = zipWithEqual mk_tyvar tyvar_names kinds
+ (names, kinds) = unzip tyvars_w_kinds
tc_kinds = map kindToTcKind kinds
- mk_tyvar name kind = mkTyVar (getNameShortName name) (getItsUnique name) kind
-- for unfoldings only:
tcMonoTypeKind (MonoDictTy class_name ty)
tcLookupClass class_name `thenNF_Tc` \ (class_kind, clas) ->
unifyKind class_kind arg_kind `thenTc_`
returnTc (mkTcTypeKind, mkDictTy clas arg_ty)
+\end{code}
+Help functions for type applications
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+\begin{code}
+tcMonoTyApp fun_kind fun_ty tys
+ = mapAndUnzipTc tcMonoTypeKind tys `thenTc` \ (arg_kinds, arg_tys) ->
+ newKindVar `thenNF_Tc` \ result_kind ->
+ unifyKind fun_kind (foldr mkTcArrowKind result_kind arg_kinds) `thenTc_`
+ returnTc (result_kind, foldl mkAppTy fun_ty arg_tys)
-tc_mono_name :: Name -> NF_TcM s (TcKind s, Type)
-tc_mono_name name@(Short _ _) -- Must be a type variable
- = tcLookupTyVar name `thenNF_Tc` \ (kind,tyvar) ->
- returnNF_Tc (kind, mkTyVarTy tyvar)
+tcSynApp name syn_kind arity tycon tys
+ = mapAndUnzipTc tcMonoTypeKind tys `thenTc` \ (arg_kinds, arg_tys) ->
+ newKindVar `thenNF_Tc` \ result_kind ->
+ unifyKind syn_kind (foldr mkTcArrowKind result_kind arg_kinds) `thenTc_`
-tc_mono_name name | isTyConName name -- Must be a type constructor
- = tcLookupTyCon name `thenNF_Tc` \ (kind,tycon) ->
- returnNF_Tc (kind, mkTyConTy tycon)
-
-tc_mono_name name -- Renamer should have got it right
- = panic ("tc_mono_name:" ++ ppShow 1000 (ppr PprDebug name))
+ -- Check that it's applied to the right number of arguments
+ checkTc (arity == n_args) (err arity) `thenTc_`
+ returnTc (result_kind, mkSynTy tycon arg_tys)
+ where
+ err arity = arityErr "Type synonym constructor" name arity n_args
+ n_args = length tys
\end{code}
)
\end{code}
-Auxilliary functions
-~~~~~~~~~~~~~~~~~~~~
-\begin{code}
-synArityCheck :: Name -> Int -> TcM s ()
-synArityCheck name n_args
- = case getSynNameArity name of
- Just arity | arity /= n_args -> failTc (err arity)
- other -> returnTc ()
- where
- err arity = arityErr "Type synonym constructor" name arity n_args
-\end{code}
-
Errors and contexts
~~~~~~~~~~~~~~~~~~~
\begin{code}