import RnHsSyn ( RenamedTyDecl(..), RenamedConDecl(..),
RnName{-instance Outputable-}
)
-import TcHsSyn ( mkHsTyLam, mkHsDictLam, tcIdType, zonkId,
+import TcHsSyn ( mkHsTyLam, mkHsDictLam, tcIdType,
TcHsBinds(..), TcIdOcc(..)
)
import Inst ( newDicts, InstOrigin(..), Inst )
import TcMonoType ( tcMonoTypeKind, tcMonoType, tcPolyType, tcContext )
+import TcSimplify ( tcSimplifyThetas )
import TcType ( tcInstTyVars, tcInstType, tcInstId )
import TcEnv ( tcLookupTyCon, tcLookupTyVar, tcLookupClass,
- newLocalId, newLocalIds
+ newLocalId, newLocalIds, tcLookupClassByKey
)
import TcMonad hiding ( rnMtoTcM )
import TcKind ( TcKind, unifyKind, mkTcArrowKind, mkTcTypeKind )
-import Class ( GenClass{-instance Eq-} )
-import Id ( mkDataCon, dataConSig, mkRecordSelId,
+import PprType ( GenClass, GenType{-instance Outputable-} )
+import Class ( GenClass{-instance Eq-}, classInstEnv )
+import Id ( mkDataCon, dataConSig, mkRecordSelId, idType,
dataConFieldLabels, dataConStrictMarks,
StrictnessMark(..),
GenId{-instance NamedThing-}
import Name ( nameSrcLoc, isLocallyDefinedName, getSrcLoc,
Name{-instance Ord3-}
)
+import Outputable ( Outputable(..), interpp'SP )
import Pretty
import TyCon ( TyCon, NewOrData(..), mkSynTyCon, mkDataTyCon, isDataTyCon,
- isNewTyCon, tyConDataCons
+ isNewTyCon, isSynTyCon, tyConDataCons
)
-import Type ( typeKind, getTyVar, tyVarsOfTypes, eqTy,
+import Type ( GenType, -- instances
+ typeKind, getTyVar, tyVarsOfTypes, eqTy, splitSigmaTy,
applyTyCon, mkTyVarTys, mkForAllTys, mkFunTy,
splitFunTy, mkTyVarTy, getTyVar_maybe
)
+import PprType ( GenTyVar{-instance Outputable-}{-ToDo:possibly rm-} )
import TyVar ( tyVarKind, elementOfTyVarSet, GenTyVar{-instance Eq-} )
import Unique ( Unique {- instance Eq -}, evalClassKey )
import UniqSet ( emptyUniqSet, mkUniqSet, uniqSetToList, unionManyUniqSets, UniqSet(..) )
-import Util ( equivClasses, zipEqual, panic, assertPanic )
+import Util ( equivClasses, zipEqual, nOfThem, panic, assertPanic )
\end{code}
\begin{code}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
\begin{code}
-mkDataBinds :: TyCon -> TcM s ([Id], TcHsBinds s)
-mkDataBinds tycon
+mkDataBinds :: [TyCon] -> TcM s ([Id], TcHsBinds s)
+mkDataBinds [] = returnTc ([], EmptyBinds)
+mkDataBinds (tycon : tycons)
+ | isSynTyCon tycon = mkDataBinds tycons
+ | otherwise = mkDataBinds_one tycon `thenTc` \ (ids1, b1) ->
+ mkDataBinds tycons `thenTc` \ (ids2, b2) ->
+ returnTc (ids1++ids2, b1 `ThenBinds` b2)
+
+mkDataBinds_one tycon
= ASSERT( isDataTyCon tycon || isNewTyCon tycon )
mapAndUnzipTc mkConstructor data_cons `thenTc` \ (con_ids, con_binds) ->
mapAndUnzipTc (mkRecordSelector tycon) groups `thenTc` \ (sel_ids, sel_binds) ->
= returnTc (con_id, EmptyMonoBinds)
| otherwise -- It is locally defined
- = tcInstId con_id `thenNF_Tc` \ (tyvars, theta, tau) ->
- newDicts DataDeclOrigin theta `thenNF_Tc` \ (_, dicts) ->
+ = tcInstId con_id `thenNF_Tc` \ (tc_tyvars, tc_theta, tc_tau) ->
+ newDicts DataDeclOrigin tc_theta `thenNF_Tc` \ (_, dicts) ->
let
- (arg_tys, result_ty) = splitFunTy tau
- n_args = length arg_tys
+ (tc_arg_tys, tc_result_ty) = splitFunTy tc_tau
+ n_args = length tc_arg_tys
in
- newLocalIds (take n_args (repeat SLIT("con"))) arg_tys
- `thenNF_Tc` \ args ->
+ newLocalIds (nOfThem n_args SLIT("con")) tc_arg_tys `thenNF_Tc` \ args ->
- -- Check that all the types of all the strict arguments are in Data.
- -- This is trivially true of everything except type variables, for
- -- which we must check the context.
+ -- Check that all the types of all the strict arguments are in Eval
+ tcLookupClassByKey evalClassKey `thenNF_Tc` \ eval_clas ->
let
- strict_marks = dataConStrictMarks con_id
- strict_args = [arg | (arg, MarkedStrict) <- args `zipEqual` strict_marks]
-
- data_tyvars = -- The tyvars in the constructor's context that are arguments
- -- to the Data class
- [getTyVar "mkConstructor" ty
- | (clas,ty) <- theta, uniqueOf clas == evalClassKey]
-
- check_data arg = case getTyVar_maybe (tcIdType arg) of
- Nothing -> returnTc () -- Not a tyvar, so OK
- Just tyvar -> checkTc (tyvar `elem` data_tyvars) (missingDataErr tyvar)
+ (_,theta,tau) = splitSigmaTy (idType con_id)
+ (arg_tys, _) = splitFunTy tau
+ strict_marks = dataConStrictMarks con_id
+ eval_theta = [ (eval_clas,arg_ty)
+ | (arg_ty, MarkedStrict) <- zipEqual "strict_args"
+ arg_tys strict_marks
+ ]
in
- mapTc check_data strict_args `thenTc_`
+ tcSimplifyThetas classInstEnv theta eval_theta `thenTc` \ eval_theta' ->
+ checkTc (null eval_theta')
+ (missingEvalErr con_id eval_theta') `thenTc_`
+
-- Build the data constructor
let
- con_rhs = mkHsTyLam tyvars $
+ con_rhs = mkHsTyLam tc_tyvars $
mkHsDictLam dicts $
mk_pat_match args $
- mk_case strict_args $
- HsCon con_id (mkTyVarTys tyvars) (map HsVar args)
+ mk_case (zipEqual "strict_args" args strict_marks) $
+ HsCon con_id (mkTyVarTys tc_tyvars) (map HsVar args)
mk_pat_match [] body = body
- mk_pat_match (arg:args) body = HsLam (PatMatch (VarPat arg) (SimpleMatch (mk_pat_match args body)))
+ mk_pat_match (arg:args) body = HsLam $
+ PatMatch (VarPat arg) $
+ SimpleMatch (mk_pat_match args body)
mk_case [] body = body
- mk_case (arg:args) body = HsCase (HsVar arg)
- [PatMatch (VarPat arg) (SimpleMatch (mk_case args body))]
- src_loc
+ mk_case ((arg,MarkedStrict):args) body = HsCase (HsVar arg)
+ [PatMatch (VarPat arg) $
+ SimpleMatch (mk_case args body)]
+ src_loc
+ mk_case (_:args) body = mk_case args body
src_loc = nameSrcLoc (getName con_id)
in
arg_tys = [ty | (_, ty, _) <- field_label_infos]
field_labels = [ mkFieldLabel (getName name) ty tag
- | ((name, ty, _), tag) <- field_label_infos `zip` allFieldLabelTags
- ]
+ | ((name, ty, _), tag) <- field_label_infos `zip` allFieldLabelTags ]
data_con = mkDataCon (getName name)
stricts
fieldTypeMisMatch field_name sty
= ppSep [ppStr "Declared types differ for field", ppr sty field_name]
-missingDataErr tyvar sty
- = ppStr "Missing `data' (???)" -- ToDo: improve
+missingEvalErr con eval_theta sty
+ = ppCat [ppStr "Missing Eval context for constructor",
+ ppQuote (ppr sty con),
+ ppStr ":", ppr sty eval_theta]
\end{code}
projects / ghc-hetmet.git / blobdiff