mkDataBinds
) where
-import Ubiq{-uitous-}
+IMP_Ubiq(){-uitous-}
import HsSyn ( TyDecl(..), ConDecl(..), BangType(..), HsExpr(..),
Match(..), GRHSsAndBinds(..), GRHS(..), OutPat(..),
- HsBinds(..), HsLit, Stmt, Qual, ArithSeqInfo,
+ HsBinds(..), HsLit, Stmt, Qualifier, ArithSeqInfo,
PolyType, Fake, InPat,
Bind(..), MonoBinds(..), Sig,
MonoType )
import RnHsSyn ( RenamedTyDecl(..), RenamedConDecl(..),
RnName{-instance Outputable-}
)
-import TcHsSyn ( mkHsTyLam, mkHsDictLam, tcIdType, zonkId,
- TcHsBinds(..), TcIdOcc(..)
+import TcHsSyn ( mkHsTyLam, mkHsDictLam, tcIdType,
+ SYN_IE(TcHsBinds), TcIdOcc(..)
)
import Inst ( newDicts, InstOrigin(..), Inst )
-import TcMonoType ( tcMonoTypeKind, tcMonoType, tcContext )
+import TcMonoType ( tcMonoTypeKind, tcMonoType, tcPolyType, tcContext )
+import TcSimplify ( tcSimplifyThetas )
import TcType ( tcInstTyVars, tcInstType, tcInstId )
import TcEnv ( tcLookupTyCon, tcLookupTyVar, tcLookupClass,
- tcLookupClassByKey,
- newLocalId, newLocalIds
+ newLocalId, newLocalIds, tcLookupClassByKey
)
-import TcMonad
+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-},
+ GenTyVar{-instance Outputable-}{-ToDo:possibly rm-}
+ )
+import Class ( GenClass{-instance Eq-}, classInstEnv )
+import Id ( mkDataCon, dataConSig, mkRecordSelId, idType,
dataConFieldLabels, dataConStrictMarks,
StrictnessMark(..),
GenId{-instance NamedThing-}
)
import FieldLabel
import Kind ( Kind, mkArrowKind, mkBoxedTypeKind )
-import SpecEnv ( SpecEnv(..), nullSpecEnv )
+import SpecEnv ( SpecEnv, nullSpecEnv )
import Name ( nameSrcLoc, isLocallyDefinedName, getSrcLoc,
Name{-instance Ord3-}
)
+import Outputable ( Outputable(..), interpp'SP )
import Pretty
import TyCon ( TyCon, NewOrData(..), mkSynTyCon, mkDataTyCon, isDataTyCon,
- tyConDataCons )
-import Type ( getTypeKind, getTyVar, tyVarsOfTypes, eqTy,
+ isNewTyCon, isSynTyCon, tyConDataCons
+ )
+import Type ( GenType, -- instances
+ typeKind, getTyVar, tyVarsOfTypes, eqTy, splitSigmaTy,
applyTyCon, mkTyVarTys, mkForAllTys, mkFunTy,
splitFunTy, mkTyVarTy, getTyVar_maybe
)
-import TyVar ( getTyVarKind, elementOfTyVarSet, GenTyVar{-instance Eq-} )
-import Unique ( Unique {- instance Eq -}, dataClassKey )
-import UniqSet ( emptyUniqSet, mkUniqSet, uniqSetToList, unionManyUniqSets, UniqSet(..) )
-import Util ( equivClasses, zipEqual, panic, assertPanic )
+import TyVar ( tyVarKind, elementOfTyVarSet, GenTyVar{-instance Eq-} )
+import Unique ( Unique {- instance Eq -}, evalClassKey )
+import UniqSet ( emptyUniqSet, mkUniqSet, uniqSetToList, unionManyUniqSets, SYN_IE(UniqSet) )
+import Util ( equivClasses, zipEqual, nOfThem, panic, assertPanic )
\end{code}
\begin{code}
-- but the simplest thing to do seems to be to get the Kind by (lazily)
-- looking at the tyvars and rhs_ty.
result_kind, final_tycon_kind :: Kind -- NB not TcKind!
- result_kind = getTypeKind rhs_ty
- final_tycon_kind = foldr (mkArrowKind . getTyVarKind) result_kind rec_tyvars
+ result_kind = typeKind rhs_ty
+ final_tycon_kind = foldr (mkArrowKind . tyVarKind) result_kind rec_tyvars
-- Construct the tycon
tycon = mkSynTyCon (getName tycon_name)
let
-- Construct the tycon
final_tycon_kind :: Kind -- NB not TcKind!
- final_tycon_kind = foldr (mkArrowKind . getTyVarKind) mkBoxedTypeKind rec_tyvars
+ final_tycon_kind = foldr (mkArrowKind . tyVarKind) mkBoxedTypeKind rec_tyvars
tycon = mkDataTyCon (getName tycon_name)
final_tycon_kind
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
\begin{code}
-mkDataBinds :: TyCon -> TcM s ([Id], TcHsBinds s)
-mkDataBinds tycon
- = ASSERT( isDataTyCon 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_ids ++ sel_ids,
SingleBind $ NonRecBind $
foldr AndMonoBinds
- (foldr AndMonoBinds EmptyMonoBinds con_binds)
+ (foldr AndMonoBinds EmptyMonoBinds sel_binds)
con_binds
)
where
\d1::Data a, d2::C b ->
\p q r -> case p of { p ->
case q of { q ->
- HsCon [a,b,c] [p,q,r]}}
+ HsCon T1 [a,b] [p,q,r]}}
Notice that
= 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` {- \ pre_zonk_args ->
- mapNF_Tc zonkId pre_zonk_args `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 == dataClassKey]
-
- 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 arg_tys (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
selector_body = HsCase (HsVar record_id) (map mk_match fields) (getSrcLoc tycon)
mk_match (con_id, field_label)
- = PatMatch (RecPat con_id data_ty' [(RealId selector_id, VarPat field_id, False)]) $
+ = PatMatch (RecPat con_id data_ty' [(selector_id, VarPat field_id, False)]) $
SimpleMatch $
HsVar field_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
returnTc data_con
tcField (field_label_names, bty)
- = tcMonoType (get_ty bty) `thenTc` \ field_ty ->
+ = tcPolyType (get_pty bty) `thenTc` \ field_ty ->
returnTc [(name, field_ty, get_strictness bty) | name <- field_label_names]
tcDataCon tycon tyvars ctxt name btys src_loc
= tcAddSrcLoc src_loc $
let
stricts = map get_strictness btys
- tys = map get_ty btys
+ tys = map get_pty btys
in
- mapTc tcMonoType tys `thenTc` \ arg_tys ->
+ mapTc tcPolyType tys `thenTc` \ arg_tys ->
let
data_con = mkDataCon (getName name)
stricts
arg_tyvars = tyVarsOfTypes arg_tys
in_arg_tys (clas,ty) = getTyVar "tcDataCon" ty `elementOfTyVarSet` arg_tyvars
-get_strictness (Banged ty) = MarkedStrict
-get_strictness (Unbanged ty) = NotMarkedStrict
+get_strictness (Banged _) = MarkedStrict
+get_strictness (Unbanged _) = NotMarkedStrict
-get_ty (Banged ty) = ty
-get_ty (Unbanged ty) = ty
+get_pty (Banged ty) = ty
+get_pty (Unbanged ty) = ty
\end{code}
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