X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Ftypecheck%2FTcHsSyn.lhs;h=c993c2d9f953b7aec253073b0f76decb54a52078;hb=438596897ebbe25a07e1c82085cfbc5bdb00f09e;hp=b51e4880cb45412a085a62679366cc5a5b7057f2;hpb=c49d51f812da9b1c2ceca7e0dad8f2a3626041a9;p=ghc-hetmet.git diff --git a/ghc/compiler/typecheck/TcHsSyn.lhs b/ghc/compiler/typecheck/TcHsSyn.lhs index b51e488..c993c2d 100644 --- a/ghc/compiler/typecheck/TcHsSyn.lhs +++ b/ghc/compiler/typecheck/TcHsSyn.lhs @@ -1,5 +1,5 @@ % -% (c) The AQUA Project, Glasgow University, 1996 +% (c) The AQUA Project, Glasgow University, 1996-1998 % \section[TcHsSyn]{Specialisations of the @HsSyn@ syntax for the typechecker} @@ -8,51 +8,60 @@ checker. \begin{code} module TcHsSyn ( - TcIdBndr(..), TcIdOcc(..), + TcMonoBinds, TcHsBinds, TcPat, + TcExpr, TcGRHSsAndBinds, TcGRHS, TcMatch, + TcStmt, TcArithSeqInfo, TcRecordBinds, + TcHsModule, TcCoreExpr, TcDictBinds, + TcForeignExportDecl, - TcMonoBinds(..), TcHsBinds(..), TcBind(..), TcPat(..), - TcExpr(..), TcGRHSsAndBinds(..), TcGRHS(..), TcMatch(..), - TcQual(..), TcStmt(..), TcArithSeqInfo(..), TcRecordBinds(..), - TcHsModule(..), - - TypecheckedHsBinds(..), TypecheckedBind(..), - TypecheckedMonoBinds(..), TypecheckedPat(..), - TypecheckedHsExpr(..), TypecheckedArithSeqInfo(..), - TypecheckedQual(..), TypecheckedStmt(..), - TypecheckedMatch(..), TypecheckedHsModule(..), - TypecheckedGRHSsAndBinds(..), TypecheckedGRHS(..), - TypecheckedRecordBinds(..), + TypecheckedHsBinds, + TypecheckedMonoBinds, TypecheckedPat, + TypecheckedHsExpr, TypecheckedArithSeqInfo, + TypecheckedStmt, TypecheckedForeignDecl, + TypecheckedMatch, TypecheckedHsModule, + TypecheckedGRHSsAndBinds, TypecheckedGRHS, + TypecheckedRecordBinds, TypecheckedDictBinds, mkHsTyApp, mkHsDictApp, mkHsTyLam, mkHsDictLam, - tcIdType, - zonkBinds, - zonkInst, - zonkId, -- TcIdBndr s -> NF_TcM s Id - unZonkId -- Id -> NF_TcM s (TcIdBndr s) + -- re-exported from TcEnv + TcIdOcc(..), TcIdBndr, tcIdType, tcIdTyVars, tcInstId, + + maybeBoxedPrimType, + + zonkTopBinds, zonkTcId, zonkId, + zonkForeignExports ) where -import Ubiq{-uitous-} +#include "HsVersions.h" -- friends: import HsSyn -- oodles of it -import Id ( GenId(..), IdDetails, PragmaInfo, -- Can meddle modestly with Ids - DictVar(..), idType - ) -- others: -import TcMonad -import TcType ( TcType(..), TcMaybe, TcTyVar(..), - zonkTcTypeToType, zonkTcTyVarToTyVar, - tcInstType +import Id ( idType, setIdType, Id ) +import DataCon ( DataCon, dataConArgTys ) +import Name ( NamedThing(..) ) +import BasicTypes ( Unused ) +import TcEnv ( tcLookupGlobalValueMaybe, tcExtendGlobalValEnv, tcGetGlobalValEnv, + TcIdOcc(..), TcIdBndr, GlobalValueEnv, + tcIdType, tcIdTyVars, tcInstId ) -import Usage ( UVar(..) ) -import Util ( panic ) -import PprType ( GenType, GenTyVar ) -- instances -import TyVar ( GenTyVar ) -- instances -import Unique ( Unique ) -- instances +import TcMonad +import TcType ( TcType, TcTyVar, TcBox, + zonkTcTypeToType, zonkTcTyVarToTyVar, zonkTcType + ) +import TyCon ( isDataTyCon ) +import Type ( mkTyVarTy, splitAlgTyConApp_maybe, isUnLiftedType, Type ) +import Var ( TyVar ) +import VarEnv ( TyVarEnv, emptyVarEnv, extendVarEnvList ) +import TysWiredIn ( voidTy ) +import CoreSyn ( Expr ) +import Bag +import UniqFM +import Outputable \end{code} @@ -67,37 +76,35 @@ At the end of type checking we zonk everything to @Typechecked...@ datatypes, which have immutable type variables in them. \begin{code} -type TcIdBndr s = GenId (TcType s) -- Binders are all TcTypes -data TcIdOcc s = TcId (TcIdBndr s) -- Bindees may be either - | RealId Id - -type TcHsBinds s = HsBinds (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcBind s = Bind (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcMonoBinds s = MonoBinds (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcPat s = OutPat (TcTyVar s) UVar (TcIdOcc s) -type TcExpr s = HsExpr (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcGRHSsAndBinds s = GRHSsAndBinds (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcGRHS s = GRHS (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcMatch s = Match (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcQual s = Qual (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcStmt s = Stmt (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcArithSeqInfo s = ArithSeqInfo (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcRecordBinds s = HsRecordBinds (TcTyVar s) UVar (TcIdOcc s) (TcPat s) -type TcHsModule s = HsModule (TcTyVar s) UVar (TcIdOcc s) (TcPat s) - -type TypecheckedPat = OutPat TyVar UVar Id -type TypecheckedMonoBinds = MonoBinds TyVar UVar Id TypecheckedPat -type TypecheckedHsBinds = HsBinds TyVar UVar Id TypecheckedPat -type TypecheckedBind = Bind TyVar UVar Id TypecheckedPat -type TypecheckedHsExpr = HsExpr TyVar UVar Id TypecheckedPat -type TypecheckedArithSeqInfo = ArithSeqInfo TyVar UVar Id TypecheckedPat -type TypecheckedQual = Qual TyVar UVar Id TypecheckedPat -type TypecheckedStmt = Stmt TyVar UVar Id TypecheckedPat -type TypecheckedMatch = Match TyVar UVar Id TypecheckedPat -type TypecheckedGRHSsAndBinds = GRHSsAndBinds TyVar UVar Id TypecheckedPat -type TypecheckedGRHS = GRHS TyVar UVar Id TypecheckedPat -type TypecheckedRecordBinds = HsRecordBinds TyVar UVar Id TypecheckedPat -type TypecheckedHsModule = HsModule TyVar UVar Id TypecheckedPat +type TcHsBinds s = HsBinds (TcBox s) (TcIdOcc s) (TcPat s) +type TcMonoBinds s = MonoBinds (TcBox s) (TcIdOcc s) (TcPat s) +type TcDictBinds s = TcMonoBinds s +type TcPat s = OutPat (TcBox s) (TcIdOcc s) +type TcExpr s = HsExpr (TcBox s) (TcIdOcc s) (TcPat s) +type TcGRHSsAndBinds s = GRHSsAndBinds (TcBox s) (TcIdOcc s) (TcPat s) +type TcGRHS s = GRHS (TcBox s) (TcIdOcc s) (TcPat s) +type TcMatch s = Match (TcBox s) (TcIdOcc s) (TcPat s) +type TcStmt s = Stmt (TcBox s) (TcIdOcc s) (TcPat s) +type TcArithSeqInfo s = ArithSeqInfo (TcBox s) (TcIdOcc s) (TcPat s) +type TcRecordBinds s = HsRecordBinds (TcBox s) (TcIdOcc s) (TcPat s) +type TcHsModule s = HsModule (TcBox s) (TcIdOcc s) (TcPat s) + +type TcCoreExpr s = Expr (TcIdOcc s) (TcBox s) +type TcForeignExportDecl s = ForeignDecl (TcIdOcc s) + +type TypecheckedPat = OutPat Unused Id +type TypecheckedMonoBinds = MonoBinds Unused Id TypecheckedPat +type TypecheckedDictBinds = TypecheckedMonoBinds +type TypecheckedHsBinds = HsBinds Unused Id TypecheckedPat +type TypecheckedHsExpr = HsExpr Unused Id TypecheckedPat +type TypecheckedArithSeqInfo = ArithSeqInfo Unused Id TypecheckedPat +type TypecheckedStmt = Stmt Unused Id TypecheckedPat +type TypecheckedMatch = Match Unused Id TypecheckedPat +type TypecheckedGRHSsAndBinds = GRHSsAndBinds Unused Id TypecheckedPat +type TypecheckedGRHS = GRHS Unused Id TypecheckedPat +type TypecheckedRecordBinds = HsRecordBinds Unused Id TypecheckedPat +type TypecheckedHsModule = HsModule Unused Id TypecheckedPat +type TypecheckedForeignDecl = ForeignDecl Id \end{code} \begin{code} @@ -112,129 +119,208 @@ mkHsTyLam tyvars expr = TyLam tyvars expr mkHsDictLam [] expr = expr mkHsDictLam dicts expr = DictLam dicts expr - -tcIdType :: TcIdOcc s -> TcType s -tcIdType (TcId id) = idType id -tcIdType other = panic "tcIdType" \end{code} +%************************************************************************ +%* * +\subsection[BackSubst-HsBinds]{Running a substitution over @HsBinds@} +%* * +%************************************************************************ +Some gruesome hackery for desugaring ccalls. It's here because if we put it +in Type.lhs we get irritating loops, and it's only used by TcInstDcls.lhs and +DsCCall.lhs. \begin{code} -instance Eq (TcIdOcc s) where - (TcId id1) == (TcId id2) = id1 == id2 - (RealId id1) == (RealId id2) = id1 == id2 - -instance Outputable (TcIdOcc s) where - ppr sty (TcId id) = ppr sty id - ppr sty (RealId id) = ppr sty id - -instance NamedThing (TcIdOcc s) where - getName (TcId id) = getName id - getName (RealId id) = getName id +maybeBoxedPrimType :: Type -> Maybe (DataCon, Type) +maybeBoxedPrimType ty + = case splitAlgTyConApp_maybe ty of -- Data type, + Just (tycon, tys_applied, [data_con]) | isDataTyCon tycon -- with exactly one constructor + -> case (dataConArgTys data_con tys_applied) of + [data_con_arg_ty] -- Applied to exactly one type, + | isUnLiftedType data_con_arg_ty -- which is primitive + -> Just (data_con, data_con_arg_ty) + other_cases -> Nothing + other_cases -> Nothing \end{code} - %************************************************************************ %* * \subsection[BackSubst-HsBinds]{Running a substitution over @HsBinds@} %* * %************************************************************************ +@zonkTcId@ just works on TcIdOccs. It's used when zonking Method insts. + \begin{code} -zonkId :: TcIdOcc s -> NF_TcM s Id -unZonkId :: Id -> NF_TcM s (TcIdBndr s) +zonkTcId :: TcIdOcc s -> NF_TcM s (TcIdOcc s) +zonkTcId tc_id@(RealId id) = returnNF_Tc tc_id +zonkTcId (TcId id) + = zonkId id `thenNF_Tc` \id -> + returnNF_Tc (TcId id) + +zonkId :: TcIdBndr s -> NF_TcM s (TcIdBndr s) +zonkId id + = zonkTcType (idType id) `thenNF_Tc` \ ty' -> + returnNF_Tc (setIdType id ty') +\end{code} -zonkId (RealId id) = returnNF_Tc id -zonkId (TcId (Id u ty details prags info)) - = zonkTcTypeToType ty `thenNF_Tc` \ ty' -> - returnNF_Tc (Id u ty' details prags info) +This zonking pass runs over the bindings -unZonkId (Id u ty details prags info) - = tcInstType [] ty `thenNF_Tc` \ ty' -> - returnNF_Tc (Id u ty' details prags info) -\end{code} + a) to convert TcTyVars to TyVars etc, dereferencing any bindings etc + b) convert unbound TcTyVar to Void + c) convert each TcIdBndr to an Id by zonking its type -\begin{code} -zonkInst :: (TcIdOcc s, TcExpr s) -> NF_TcM s (Id, TypecheckedHsExpr) -zonkInst (id, expr) - = zonkId id `thenNF_Tc` \ id' -> - zonkExpr expr `thenNF_Tc` \ expr' -> - returnNF_Tc (id', expr') -\end{code} +We pass an environment around so that -\begin{code} -zonkBinds :: TcHsBinds s -> NF_TcM s TypecheckedHsBinds + a) we know which TyVars are unbound + b) we maintain sharing; eg an Id is zonked at its binding site and they + all occurrences of that Id point to the common zonked copy -zonkBinds EmptyBinds = returnNF_Tc EmptyBinds +Actually, since this is all in the Tc monad, it's convenient to keep the +mapping from TcIds to Ids in the GVE of the Tc monad. (Those TcIds +were previously in the LVE of the Tc monad.) The type variables, though, +we carry round in a separate environment. -zonkBinds (ThenBinds binds1 binds2) - = zonkBinds binds1 `thenNF_Tc` \ new_binds1 -> - zonkBinds binds2 `thenNF_Tc` \ new_binds2 -> - returnNF_Tc (ThenBinds new_binds1 new_binds2) +It's all pretty boring stuff, because HsSyn is such a large type, and +the environment manipulation is tiresome. -zonkBinds (SingleBind bind) - = zonkBind bind `thenNF_Tc` \ new_bind -> - returnNF_Tc (SingleBind new_bind) +\begin{code} +extend_te te tyvars = extendVarEnvList te [(tyvar, mkTyVarTy tyvar) | tyvar <- tyvars] + +zonkIdBndr :: TyVarEnv Type -> TcIdOcc s -> NF_TcM s Id +zonkIdBndr te (RealId id) = returnNF_Tc id +zonkIdBndr te (TcId id) + = zonkTcTypeToType te (idType id) `thenNF_Tc` \ ty' -> + returnNF_Tc (setIdType id ty') + + +zonkIdOcc :: TcIdOcc s -> NF_TcM s Id +zonkIdOcc (RealId id) = returnNF_Tc id +zonkIdOcc (TcId id) + = tcLookupGlobalValueMaybe (getName id) `thenNF_Tc` \ maybe_id' -> + let + new_id = case maybe_id' of + Just id' -> id' + Nothing -> pprTrace "zonkIdOcc: " (ppr id) $ + setIdType id voidTy + in + returnNF_Tc new_id +\end{code} -zonkBinds (AbsBinds tyvars dicts locprs dict_binds val_bind) - = mapNF_Tc zonkTcTyVarToTyVar tyvars `thenNF_Tc` \ new_tyvars -> - mapNF_Tc zonkId dicts `thenNF_Tc` \ new_dicts -> - mapNF_Tc subst_pair locprs `thenNF_Tc` \ new_locprs -> - mapNF_Tc subst_bind dict_binds `thenNF_Tc` \ new_dict_binds -> - zonkBind val_bind `thenNF_Tc` \ new_val_bind -> - returnNF_Tc (AbsBinds new_tyvars new_dicts new_locprs new_dict_binds new_val_bind) + +\begin{code} +zonkTopBinds :: TcMonoBinds s -> NF_TcM s (TypecheckedMonoBinds, GlobalValueEnv) +zonkTopBinds binds -- Top level is implicitly recursive + = fixNF_Tc (\ ~(_, new_ids) -> + tcExtendGlobalValEnv (bagToList new_ids) $ + zonkMonoBinds emptyVarEnv binds `thenNF_Tc` \ (binds', _, new_ids) -> + -- No top-level existential type variables + tcGetGlobalValEnv `thenNF_Tc` \ env -> + returnNF_Tc ((binds', env), new_ids) + ) `thenNF_Tc` \ (stuff, _) -> + returnNF_Tc stuff + + +zonkBinds :: TyVarEnv Type + -> TcHsBinds s + -> NF_TcM s (TypecheckedHsBinds, TyVarEnv Type, TcEnv s) + +zonkBinds te binds + = go binds te (\ binds' te' -> tcGetEnv `thenNF_Tc` \ env -> + returnNF_Tc (binds', te', env)) where - subst_pair (l, g) - = zonkId l `thenNF_Tc` \ new_l -> - zonkId g `thenNF_Tc` \ new_g -> - returnNF_Tc (new_l, new_g) - - subst_bind (v, e) - = zonkId v `thenNF_Tc` \ new_v -> - zonkExpr e `thenNF_Tc` \ new_e -> - returnNF_Tc (new_v, new_e) + -- go :: TcHsBinds s + -- -> (TypecheckedHsBinds + -- -> TyVarEnv Type + -- -> NF_TcM s (TypecheckedHsBinds, TyVarEnv Type, TcEnv s) + -- ) + -- -> NF_TcM s (TypecheckedHsBinds, TyVarEnv Type, TcEnv s) + go (ThenBinds b1 b2) te thing_inside = go b1 te $ \ b1' te1 -> + go b2 te1 $ \ b2' te2 -> + thing_inside (b1' `ThenBinds` b2') te2 + + go EmptyBinds te thing_inside = thing_inside EmptyBinds te + + go (MonoBind bind sigs is_rec) te thing_inside + = ASSERT( null sigs ) + fixNF_Tc (\ ~(_, new_tvs, new_ids) -> + let + new_te = extend_te te (bagToList new_tvs) + in + tcExtendGlobalValEnv (bagToList new_ids) $ + zonkMonoBinds new_te bind `thenNF_Tc` \ (new_bind, new_tvs, new_ids) -> + thing_inside (MonoBind new_bind [] is_rec) new_te `thenNF_Tc` \ stuff -> + returnNF_Tc (stuff, new_tvs, new_ids) + ) `thenNF_Tc` \ (stuff, _, _) -> + returnNF_Tc stuff \end{code} \begin{code} ------------------------------------------------------------------------- -zonkBind :: TcBind s -> NF_TcM s TypecheckedBind - -zonkBind EmptyBind = returnNF_Tc EmptyBind +zonkMonoBinds :: TyVarEnv Type + -> TcMonoBinds s + -> NF_TcM s (TypecheckedMonoBinds, Bag TyVar, Bag Id) -zonkBind (NonRecBind mbinds) - = zonkMonoBinds mbinds `thenNF_Tc` \ new_mbinds -> - returnNF_Tc (NonRecBind new_mbinds) +zonkMonoBinds te EmptyMonoBinds = returnNF_Tc (EmptyMonoBinds, emptyBag, emptyBag) -zonkBind (RecBind mbinds) - = zonkMonoBinds mbinds `thenNF_Tc` \ new_mbinds -> - returnNF_Tc (RecBind new_mbinds) +zonkMonoBinds te (AndMonoBinds mbinds1 mbinds2) + = zonkMonoBinds te mbinds1 `thenNF_Tc` \ (b1', tvs1, ids1) -> + zonkMonoBinds te mbinds2 `thenNF_Tc` \ (b2', tvs2, ids2) -> + returnNF_Tc (b1' `AndMonoBinds` b2', + tvs1 `unionBags` tvs2, + ids1 `unionBags` ids2) -------------------------------------------------------------------------- -zonkMonoBinds :: TcMonoBinds s -> NF_TcM s TypecheckedMonoBinds +zonkMonoBinds te (PatMonoBind pat grhss_w_binds locn) + = zonkPat te pat `thenNF_Tc` \ (new_pat, tvs, ids) -> + zonkGRHSsAndBinds te grhss_w_binds `thenNF_Tc` \ new_grhss_w_binds -> + returnNF_Tc (PatMonoBind new_pat new_grhss_w_binds locn, tvs, ids) -zonkMonoBinds EmptyMonoBinds = returnNF_Tc EmptyMonoBinds +zonkMonoBinds te (VarMonoBind var expr) + = zonkIdBndr te var `thenNF_Tc` \ new_var -> + zonkExpr te expr `thenNF_Tc` \ new_expr -> + returnNF_Tc (VarMonoBind new_var new_expr, emptyBag, unitBag new_var) -zonkMonoBinds (AndMonoBinds mbinds1 mbinds2) - = zonkMonoBinds mbinds1 `thenNF_Tc` \ new_mbinds1 -> - zonkMonoBinds mbinds2 `thenNF_Tc` \ new_mbinds2 -> - returnNF_Tc (AndMonoBinds new_mbinds1 new_mbinds2) +zonkMonoBinds te (CoreMonoBind var core_expr) + = zonkIdBndr te var `thenNF_Tc` \ new_var -> + returnNF_Tc (CoreMonoBind new_var core_expr, emptyBag, unitBag new_var) -zonkMonoBinds (PatMonoBind pat grhss_w_binds locn) - = zonkPat pat `thenNF_Tc` \ new_pat -> - zonkGRHSsAndBinds grhss_w_binds `thenNF_Tc` \ new_grhss_w_binds -> - returnNF_Tc (PatMonoBind new_pat new_grhss_w_binds locn) +zonkMonoBinds te (FunMonoBind var inf ms locn) + = zonkIdBndr te var `thenNF_Tc` \ new_var -> + mapNF_Tc (zonkMatch te) ms `thenNF_Tc` \ new_ms -> + returnNF_Tc (FunMonoBind new_var inf new_ms locn, emptyBag, unitBag new_var) -zonkMonoBinds (VarMonoBind var expr) - = zonkId var `thenNF_Tc` \ new_var -> - zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (VarMonoBind new_var new_expr) -zonkMonoBinds (FunMonoBind name inf ms locn) - = zonkId name `thenNF_Tc` \ new_name -> - mapNF_Tc zonkMatch ms `thenNF_Tc` \ new_ms -> - returnNF_Tc (FunMonoBind new_name inf new_ms locn) +zonkMonoBinds te (AbsBinds tyvars dicts exports val_bind) + = mapNF_Tc zonkTcTyVarToTyVar tyvars `thenNF_Tc` \ new_tyvars -> + let + new_te = extend_te te new_tyvars + in + mapNF_Tc (zonkIdBndr new_te) dicts `thenNF_Tc` \ new_dicts -> + + tcExtendGlobalValEnv new_dicts $ + fixNF_Tc (\ ~(_, _, val_bind_tvs, val_bind_ids) -> + let + new_te2 = extend_te new_te (bagToList val_bind_tvs) + in + tcExtendGlobalValEnv (bagToList val_bind_ids) $ + zonkMonoBinds new_te2 val_bind `thenNF_Tc` \ (new_val_bind, val_bind_tvs, val_bind_ids) -> + mapNF_Tc (zonkExport new_te2) exports `thenNF_Tc` \ new_exports -> + returnNF_Tc (new_val_bind, new_exports, val_bind_tvs, val_bind_ids) + ) `thenNF_Tc ` \ (new_val_bind, new_exports, _, _) -> + let + new_globals = listToBag [global | (_, global, local) <- new_exports] + in + returnNF_Tc (AbsBinds new_tyvars new_dicts new_exports new_val_bind, + emptyBag, -- For now. + new_globals) + where + zonkExport te (tyvars, global, local) + = mapNF_Tc zonkTcTyVarToTyVar tyvars `thenNF_Tc` \ new_tyvars -> + zonkIdBndr te global `thenNF_Tc` \ new_global -> + zonkIdOcc local `thenNF_Tc` \ new_local -> + returnNF_Tc (new_tyvars, new_global, new_local) \end{code} %************************************************************************ @@ -244,39 +330,42 @@ zonkMonoBinds (FunMonoBind name inf ms locn) %************************************************************************ \begin{code} -zonkMatch :: TcMatch s -> NF_TcM s TypecheckedMatch - -zonkMatch (PatMatch pat match) - = zonkPat pat `thenNF_Tc` \ new_pat -> - zonkMatch match `thenNF_Tc` \ new_match -> +zonkMatch :: TyVarEnv Type + -> TcMatch s -> NF_TcM s TypecheckedMatch + +zonkMatch te (PatMatch pat match) + = zonkPat te pat `thenNF_Tc` \ (new_pat, new_tvs, new_ids) -> + let + new_te = extend_te te (bagToList new_tvs) + in + tcExtendGlobalValEnv (bagToList new_ids) $ + zonkMatch new_te match `thenNF_Tc` \ new_match -> returnNF_Tc (PatMatch new_pat new_match) -zonkMatch (GRHSMatch grhss_w_binds) - = zonkGRHSsAndBinds grhss_w_binds `thenNF_Tc` \ new_grhss_w_binds -> +zonkMatch te (GRHSMatch grhss_w_binds) + = zonkGRHSsAndBinds te grhss_w_binds `thenNF_Tc` \ new_grhss_w_binds -> returnNF_Tc (GRHSMatch new_grhss_w_binds) -zonkMatch (SimpleMatch expr) - = zonkExpr expr `thenNF_Tc` \ new_expr -> +zonkMatch te (SimpleMatch expr) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> returnNF_Tc (SimpleMatch new_expr) ------------------------------------------------------------------------- -zonkGRHSsAndBinds :: TcGRHSsAndBinds s - -> NF_TcM s TypecheckedGRHSsAndBinds - -zonkGRHSsAndBinds (GRHSsAndBindsOut grhss binds ty) - = mapNF_Tc zonk_grhs grhss `thenNF_Tc` \ new_grhss -> - zonkBinds binds `thenNF_Tc` \ new_binds -> - zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> +zonkGRHSsAndBinds :: TyVarEnv Type + -> TcGRHSsAndBinds s + -> NF_TcM s TypecheckedGRHSsAndBinds + +zonkGRHSsAndBinds te (GRHSsAndBindsOut grhss binds ty) + = zonkBinds te binds `thenNF_Tc` \ (new_binds, new_te, new_env) -> + tcSetEnv new_env $ + let + zonk_grhs (GRHS guarded locn) + = zonkStmts new_te guarded `thenNF_Tc` \ new_guarded -> + returnNF_Tc (GRHS new_guarded locn) + in + mapNF_Tc zonk_grhs grhss `thenNF_Tc` \ new_grhss -> + zonkTcTypeToType new_te ty `thenNF_Tc` \ new_ty -> returnNF_Tc (GRHSsAndBindsOut new_grhss new_binds new_ty) - where - zonk_grhs (GRHS guard expr locn) - = zonkExpr guard `thenNF_Tc` \ new_guard -> - zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (GRHS new_guard new_expr locn) - - zonk_grhs (OtherwiseGRHS expr locn) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (OtherwiseGRHS new_expr locn) \end{code} %************************************************************************ @@ -285,211 +374,223 @@ zonkGRHSsAndBinds (GRHSsAndBindsOut grhss binds ty) %* * %************************************************************************ -ToDo: panic on things that can't be in @TypecheckedHsExpr@. - \begin{code} -zonkExpr :: TcExpr s -> NF_TcM s TypecheckedHsExpr +zonkExpr :: TyVarEnv Type + -> TcExpr s -> NF_TcM s TypecheckedHsExpr -zonkExpr (HsVar name) - = zonkId name `thenNF_Tc` \ new_name -> - returnNF_Tc (HsVar new_name) +zonkExpr te (HsVar id) + = zonkIdOcc id `thenNF_Tc` \ id' -> + returnNF_Tc (HsVar id') -zonkExpr (HsLitOut lit ty) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> +zonkExpr te (HsLit _) = panic "zonkExpr te:HsLit" + +zonkExpr te (HsLitOut lit ty) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> returnNF_Tc (HsLitOut lit new_ty) -zonkExpr (HsLam match) - = zonkMatch match `thenNF_Tc` \ new_match -> +zonkExpr te (HsLam match) + = zonkMatch te match `thenNF_Tc` \ new_match -> returnNF_Tc (HsLam new_match) -zonkExpr (HsApp e1 e2) - = zonkExpr e1 `thenNF_Tc` \ new_e1 -> - zonkExpr e2 `thenNF_Tc` \ new_e2 -> +zonkExpr te (HsApp e1 e2) + = zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> returnNF_Tc (HsApp new_e1 new_e2) -zonkExpr (OpApp e1 op e2) - = zonkExpr e1 `thenNF_Tc` \ new_e1 -> - zonkExpr op `thenNF_Tc` \ new_op -> - zonkExpr e2 `thenNF_Tc` \ new_e2 -> - returnNF_Tc (OpApp new_e1 new_op new_e2) +zonkExpr te (OpApp e1 op fixity e2) + = zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te op `thenNF_Tc` \ new_op -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> + returnNF_Tc (OpApp new_e1 new_op fixity new_e2) -zonkExpr (NegApp _) = panic "zonkExpr:NegApp" -zonkExpr (HsPar _) = panic "zonkExpr:HsPar" +zonkExpr te (NegApp _ _) = panic "zonkExpr te:NegApp" +zonkExpr te (HsPar _) = panic "zonkExpr te:HsPar" -zonkExpr (SectionL expr op) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - zonkExpr op `thenNF_Tc` \ new_op -> +zonkExpr te (SectionL expr op) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkExpr te op `thenNF_Tc` \ new_op -> returnNF_Tc (SectionL new_expr new_op) -zonkExpr (SectionR op expr) - = zonkExpr op `thenNF_Tc` \ new_op -> - zonkExpr expr `thenNF_Tc` \ new_expr -> +zonkExpr te (SectionR op expr) + = zonkExpr te op `thenNF_Tc` \ new_op -> + zonkExpr te expr `thenNF_Tc` \ new_expr -> returnNF_Tc (SectionR new_op new_expr) -zonkExpr (HsCase expr ms src_loc) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - mapNF_Tc zonkMatch ms `thenNF_Tc` \ new_ms -> +zonkExpr te (HsCase expr ms src_loc) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + mapNF_Tc (zonkMatch te) ms `thenNF_Tc` \ new_ms -> returnNF_Tc (HsCase new_expr new_ms src_loc) -zonkExpr (HsIf e1 e2 e3 src_loc) - = zonkExpr e1 `thenNF_Tc` \ new_e1 -> - zonkExpr e2 `thenNF_Tc` \ new_e2 -> - zonkExpr e3 `thenNF_Tc` \ new_e3 -> +zonkExpr te (HsIf e1 e2 e3 src_loc) + = zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> + zonkExpr te e3 `thenNF_Tc` \ new_e3 -> returnNF_Tc (HsIf new_e1 new_e2 new_e3 src_loc) -zonkExpr (HsLet binds expr) - = zonkBinds binds `thenNF_Tc` \ new_binds -> - zonkExpr expr `thenNF_Tc` \ new_expr -> +zonkExpr te (HsLet binds expr) + = zonkBinds te binds `thenNF_Tc` \ (new_binds, new_te, new_env) -> + tcSetEnv new_env $ + zonkExpr new_te expr `thenNF_Tc` \ new_expr -> returnNF_Tc (HsLet new_binds new_expr) -zonkExpr (HsDo _ _) = panic "zonkExpr:HsDo" - -zonkExpr (HsDoOut stmts m_id mz_id src_loc) - = zonkStmts stmts `thenNF_Tc` \ new_stmts -> - zonkId m_id `thenNF_Tc` \ m_new -> - zonkId mz_id `thenNF_Tc` \ mz_new -> - returnNF_Tc (HsDoOut new_stmts m_new mz_new src_loc) +zonkExpr te (HsDo _ _ _) = panic "zonkExpr te:HsDo" -zonkExpr (ListComp expr quals) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - zonkQuals quals `thenNF_Tc` \ new_quals -> - returnNF_Tc (ListComp new_expr new_quals) +zonkExpr te (HsDoOut do_or_lc stmts return_id then_id zero_id ty src_loc) + = zonkStmts te stmts `thenNF_Tc` \ new_stmts -> + zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + zonkIdOcc return_id `thenNF_Tc` \ new_return_id -> + zonkIdOcc then_id `thenNF_Tc` \ new_then_id -> + zonkIdOcc zero_id `thenNF_Tc` \ new_zero_id -> + returnNF_Tc (HsDoOut do_or_lc new_stmts new_return_id new_then_id new_zero_id + new_ty src_loc) -zonkExpr (ExplicitList _) = panic "zonkExpr:ExplicitList" +zonkExpr te (ExplicitList _) = panic "zonkExpr te:ExplicitList" -zonkExpr (ExplicitListOut ty exprs) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - mapNF_Tc zonkExpr exprs `thenNF_Tc` \ new_exprs -> +zonkExpr te (ExplicitListOut ty exprs) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + mapNF_Tc (zonkExpr te) exprs `thenNF_Tc` \ new_exprs -> returnNF_Tc (ExplicitListOut new_ty new_exprs) -zonkExpr (ExplicitTuple exprs) - = mapNF_Tc zonkExpr exprs `thenNF_Tc` \ new_exprs -> - returnNF_Tc (ExplicitTuple new_exprs) +zonkExpr te (ExplicitTuple exprs boxed) + = mapNF_Tc (zonkExpr te) exprs `thenNF_Tc` \ new_exprs -> + returnNF_Tc (ExplicitTuple new_exprs boxed) -zonkExpr (RecordCon con rbinds) - = panic "zonkExpr:RecordCon" -zonkExpr (RecordUpd exp rbinds) - = panic "zonkExpr:RecordUpd" -zonkExpr (RecordUpdOut exp ids rbinds) - = panic "zonkExpr:RecordUpdOut" +zonkExpr te (HsCon data_con tys exprs) + = mapNF_Tc (zonkTcTypeToType te) tys `thenNF_Tc` \ new_tys -> + mapNF_Tc (zonkExpr te) exprs `thenNF_Tc` \ new_exprs -> + returnNF_Tc (HsCon data_con new_tys new_exprs) -zonkExpr (ExprWithTySig _ _) = panic "zonkExpr:ExprWithTySig" -zonkExpr (ArithSeqIn _) = panic "zonkExpr:ArithSeqIn" +zonkExpr te (RecordConOut data_con con_expr rbinds) + = zonkExpr te con_expr `thenNF_Tc` \ new_con_expr -> + zonkRbinds te rbinds `thenNF_Tc` \ new_rbinds -> + returnNF_Tc (RecordConOut data_con new_con_expr new_rbinds) -zonkExpr (ArithSeqOut expr info) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - zonkArithSeq info `thenNF_Tc` \ new_info -> +zonkExpr te (RecordUpd _ _) = panic "zonkExpr te:RecordUpd" + +zonkExpr te (RecordUpdOut expr ty dicts rbinds) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + mapNF_Tc zonkIdOcc dicts `thenNF_Tc` \ new_dicts -> + zonkRbinds te rbinds `thenNF_Tc` \ new_rbinds -> + returnNF_Tc (RecordUpdOut new_expr new_ty new_dicts new_rbinds) + +zonkExpr te (ExprWithTySig _ _) = panic "zonkExpr te:ExprWithTySig" +zonkExpr te (ArithSeqIn _) = panic "zonkExpr te:ArithSeqIn" + +zonkExpr te (ArithSeqOut expr info) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkArithSeq te info `thenNF_Tc` \ new_info -> returnNF_Tc (ArithSeqOut new_expr new_info) -zonkExpr (CCall fun args may_gc is_casm result_ty) - = mapNF_Tc zonkExpr args `thenNF_Tc` \ new_args -> - zonkTcTypeToType result_ty `thenNF_Tc` \ new_result_ty -> +zonkExpr te (CCall fun args may_gc is_casm result_ty) + = mapNF_Tc (zonkExpr te) args `thenNF_Tc` \ new_args -> + zonkTcTypeToType te result_ty `thenNF_Tc` \ new_result_ty -> returnNF_Tc (CCall fun new_args may_gc is_casm new_result_ty) -zonkExpr (HsSCC label expr) - = zonkExpr expr `thenNF_Tc` \ new_expr -> +zonkExpr te (HsSCC label expr) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> returnNF_Tc (HsSCC label new_expr) -zonkExpr (TyLam tyvars expr) +zonkExpr te (TyLam tyvars expr) = mapNF_Tc zonkTcTyVarToTyVar tyvars `thenNF_Tc` \ new_tyvars -> - zonkExpr expr `thenNF_Tc` \ new_expr -> + let + new_te = extend_te te new_tyvars + in + zonkExpr new_te expr `thenNF_Tc` \ new_expr -> returnNF_Tc (TyLam new_tyvars new_expr) -zonkExpr (TyApp expr tys) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - mapNF_Tc zonkTcTypeToType tys `thenNF_Tc` \ new_tys -> +zonkExpr te (TyApp expr tys) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + mapNF_Tc (zonkTcTypeToType te) tys `thenNF_Tc` \ new_tys -> returnNF_Tc (TyApp new_expr new_tys) -zonkExpr (DictLam dicts expr) - = mapNF_Tc zonkId dicts `thenNF_Tc` \ new_dicts -> - zonkExpr expr `thenNF_Tc` \ new_expr -> +zonkExpr te (DictLam dicts expr) + = mapNF_Tc (zonkIdBndr te) dicts `thenNF_Tc` \ new_dicts -> + tcExtendGlobalValEnv new_dicts $ + zonkExpr te expr `thenNF_Tc` \ new_expr -> returnNF_Tc (DictLam new_dicts new_expr) -zonkExpr (DictApp expr dicts) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - mapNF_Tc zonkId dicts `thenNF_Tc` \ new_dicts -> +zonkExpr te (DictApp expr dicts) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + mapNF_Tc zonkIdOcc dicts `thenNF_Tc` \ new_dicts -> returnNF_Tc (DictApp new_expr new_dicts) -zonkExpr (ClassDictLam dicts methods expr) - = mapNF_Tc zonkId dicts `thenNF_Tc` \ new_dicts -> - mapNF_Tc zonkId methods `thenNF_Tc` \ new_methods -> - zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (ClassDictLam new_dicts new_methods new_expr) - -zonkExpr (Dictionary dicts methods) - = mapNF_Tc zonkId dicts `thenNF_Tc` \ new_dicts -> - mapNF_Tc zonkId methods `thenNF_Tc` \ new_methods -> - returnNF_Tc (Dictionary new_dicts new_methods) -zonkExpr (SingleDict name) - = zonkId name `thenNF_Tc` \ new_name -> - returnNF_Tc (SingleDict new_name) - -zonkExpr (HsCon con tys vargs) - = mapNF_Tc zonkTcTypeToType tys `thenNF_Tc` \ new_tys -> - mapNF_Tc zonkExpr vargs `thenNF_Tc` \ new_vargs -> - returnNF_Tc (HsCon con new_tys new_vargs) ------------------------------------------------------------------------- -zonkArithSeq :: TcArithSeqInfo s -> NF_TcM s TypecheckedArithSeqInfo +zonkArithSeq :: TyVarEnv Type + -> TcArithSeqInfo s -> NF_TcM s TypecheckedArithSeqInfo -zonkArithSeq (From e) - = zonkExpr e `thenNF_Tc` \ new_e -> +zonkArithSeq te (From e) + = zonkExpr te e `thenNF_Tc` \ new_e -> returnNF_Tc (From new_e) -zonkArithSeq (FromThen e1 e2) - = zonkExpr e1 `thenNF_Tc` \ new_e1 -> - zonkExpr e2 `thenNF_Tc` \ new_e2 -> +zonkArithSeq te (FromThen e1 e2) + = zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> returnNF_Tc (FromThen new_e1 new_e2) -zonkArithSeq (FromTo e1 e2) - = zonkExpr e1 `thenNF_Tc` \ new_e1 -> - zonkExpr e2 `thenNF_Tc` \ new_e2 -> +zonkArithSeq te (FromTo e1 e2) + = zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> returnNF_Tc (FromTo new_e1 new_e2) -zonkArithSeq (FromThenTo e1 e2 e3) - = zonkExpr e1 `thenNF_Tc` \ new_e1 -> - zonkExpr e2 `thenNF_Tc` \ new_e2 -> - zonkExpr e3 `thenNF_Tc` \ new_e3 -> +zonkArithSeq te (FromThenTo e1 e2 e3) + = zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> + zonkExpr te e3 `thenNF_Tc` \ new_e3 -> returnNF_Tc (FromThenTo new_e1 new_e2 new_e3) ------------------------------------------------------------------------- -zonkQuals :: [TcQual s] -> NF_TcM s [TypecheckedQual] +zonkStmts :: TyVarEnv Type + -> [TcStmt s] + -> NF_TcM s [TypecheckedStmt] -zonkQuals quals - = mapNF_Tc zonk_qual quals - where - zonk_qual (GeneratorQual pat expr) - = zonkPat pat `thenNF_Tc` \ new_pat -> - zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (GeneratorQual new_pat new_expr) +zonkStmts te [] = returnNF_Tc [] + +zonkStmts te [ReturnStmt expr] + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + returnNF_Tc [ReturnStmt new_expr] + +zonkStmts te (ExprStmt expr locn : stmts) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkStmts te stmts `thenNF_Tc` \ new_stmts -> + returnNF_Tc (ExprStmt new_expr locn : new_stmts) + +zonkStmts te (GuardStmt expr locn : stmts) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkStmts te stmts `thenNF_Tc` \ new_stmts -> + returnNF_Tc (GuardStmt new_expr locn : new_stmts) + +zonkStmts te (LetStmt binds : stmts) + = zonkBinds te binds `thenNF_Tc` \ (new_binds, new_te, new_env) -> + tcSetEnv new_env $ + zonkStmts new_te stmts `thenNF_Tc` \ new_stmts -> + returnNF_Tc (LetStmt new_binds : new_stmts) + +zonkStmts te (BindStmt pat expr locn : stmts) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkPat te pat `thenNF_Tc` \ (new_pat, new_tvs, new_ids) -> + let + new_te = extend_te te (bagToList new_tvs) + in + tcExtendGlobalValEnv (bagToList new_ids) $ + zonkStmts new_te stmts `thenNF_Tc` \ new_stmts -> + returnNF_Tc (BindStmt new_pat new_expr locn : new_stmts) - zonk_qual (FilterQual expr) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (FilterQual new_expr) - zonk_qual (LetQual binds) - = zonkBinds binds `thenNF_Tc` \ new_binds -> - returnNF_Tc (LetQual new_binds) ------------------------------------------------------------------------- -zonkStmts :: [TcStmt s] -> NF_TcM s [TypecheckedStmt] +zonkRbinds :: TyVarEnv Type + -> TcRecordBinds s -> NF_TcM s TypecheckedRecordBinds -zonkStmts stmts - = mapNF_Tc zonk_stmt stmts +zonkRbinds te rbinds + = mapNF_Tc zonk_rbind rbinds where - zonk_stmt (BindStmt pat expr src_loc) - = zonkPat pat `thenNF_Tc` \ new_pat -> - zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (BindStmt new_pat new_expr src_loc) - - zonk_stmt (ExprStmt expr src_loc) - = zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (ExprStmt new_expr src_loc) - - zonk_stmt (LetStmt binds) - = zonkBinds binds `thenNF_Tc` \ new_binds -> - returnNF_Tc (LetStmt new_binds) + zonk_rbind (field, expr, pun) + = zonkExpr te expr `thenNF_Tc` \ new_expr -> + zonkIdOcc field `thenNF_Tc` \ new_field -> + returnNF_Tc (new_field, new_expr, pun) \end{code} %************************************************************************ @@ -499,58 +600,116 @@ zonkStmts stmts %************************************************************************ \begin{code} -zonkPat :: TcPat s -> NF_TcM s TypecheckedPat - -zonkPat (WildPat ty) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - returnNF_Tc (WildPat new_ty) - -zonkPat (VarPat v) - = zonkId v `thenNF_Tc` \ new_v -> - returnNF_Tc (VarPat new_v) - -zonkPat (LazyPat pat) - = zonkPat pat `thenNF_Tc` \ new_pat -> - returnNF_Tc (LazyPat new_pat) - -zonkPat (AsPat n pat) - = zonkId n `thenNF_Tc` \ new_n -> - zonkPat pat `thenNF_Tc` \ new_pat -> - returnNF_Tc (AsPat new_n new_pat) - -zonkPat (ConPat n ty pats) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - mapNF_Tc zonkPat pats `thenNF_Tc` \ new_pats -> - returnNF_Tc (ConPat n new_ty new_pats) - -zonkPat (ConOpPat pat1 op pat2 ty) - = zonkPat pat1 `thenNF_Tc` \ new_pat1 -> - zonkPat pat2 `thenNF_Tc` \ new_pat2 -> - zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - returnNF_Tc (ConOpPat new_pat1 op new_pat2 new_ty) - -zonkPat (ListPat ty pats) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - mapNF_Tc zonkPat pats `thenNF_Tc` \ new_pats -> - returnNF_Tc (ListPat new_ty new_pats) - -zonkPat (TuplePat pats) - = mapNF_Tc zonkPat pats `thenNF_Tc` \ new_pats -> - returnNF_Tc (TuplePat new_pats) - -zonkPat (LitPat lit ty) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - returnNF_Tc (LitPat lit new_ty) - -zonkPat (NPat lit ty expr) - = zonkTcTypeToType ty `thenNF_Tc` \ new_ty -> - zonkExpr expr `thenNF_Tc` \ new_expr -> - returnNF_Tc (NPat lit new_ty new_expr) - -zonkPat (DictPat ds ms) - = mapNF_Tc zonkId ds `thenNF_Tc` \ new_ds -> - mapNF_Tc zonkId ms `thenNF_Tc` \ new_ms -> - returnNF_Tc (DictPat new_ds new_ms) +zonkPat :: TyVarEnv Type + -> TcPat s -> NF_TcM s (TypecheckedPat, Bag TyVar, Bag Id) + +zonkPat te (WildPat ty) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + returnNF_Tc (WildPat new_ty, emptyBag, emptyBag) + +zonkPat te (VarPat v) + = zonkIdBndr te v `thenNF_Tc` \ new_v -> + returnNF_Tc (VarPat new_v, emptyBag, unitBag new_v) + +zonkPat te (LazyPat pat) + = zonkPat te pat `thenNF_Tc` \ (new_pat, tvs, ids) -> + returnNF_Tc (LazyPat new_pat, tvs, ids) + +zonkPat te (AsPat n pat) + = zonkIdBndr te n `thenNF_Tc` \ new_n -> + zonkPat te pat `thenNF_Tc` \ (new_pat, tvs, ids) -> + returnNF_Tc (AsPat new_n new_pat, tvs, new_n `consBag` ids) + +zonkPat te (ListPat ty pats) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + zonkPats te pats `thenNF_Tc` \ (new_pats, tvs, ids) -> + returnNF_Tc (ListPat new_ty new_pats, tvs, ids) + +zonkPat te (TuplePat pats boxed) + = zonkPats te pats `thenNF_Tc` \ (new_pats, tvs, ids) -> + returnNF_Tc (TuplePat new_pats boxed, tvs, ids) + +zonkPat te (ConPat n ty tvs dicts pats) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + mapNF_Tc zonkTcTyVarToTyVar tvs `thenNF_Tc` \ new_tvs -> + let + new_te = extend_te te new_tvs + in + mapNF_Tc (zonkIdBndr new_te) dicts `thenNF_Tc` \ new_dicts -> + tcExtendGlobalValEnv new_dicts $ + + zonkPats new_te pats `thenNF_Tc` \ (new_pats, tvs, ids) -> + + returnNF_Tc (ConPat n new_ty new_tvs new_dicts new_pats, + listToBag new_tvs `unionBags` tvs, + listToBag new_dicts `unionBags` ids) + +zonkPat te (RecPat n ty tvs dicts rpats) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + mapNF_Tc zonkTcTyVarToTyVar tvs `thenNF_Tc` \ new_tvs -> + let + new_te = extend_te te new_tvs + in + mapNF_Tc (zonkIdBndr new_te) dicts `thenNF_Tc` \ new_dicts -> + tcExtendGlobalValEnv new_dicts $ + mapNF_Tc (zonk_rpat new_te) rpats `thenNF_Tc` \ stuff -> + let + (new_rpats, tvs_s, ids_s) = unzip3 stuff + in + returnNF_Tc (RecPat n new_ty new_tvs new_dicts new_rpats, + listToBag new_tvs `unionBags` unionManyBags tvs_s, + listToBag new_dicts `unionBags` unionManyBags ids_s) + where + zonk_rpat te (f, pat, pun) + = zonkPat te pat `thenNF_Tc` \ (new_pat, tvs, ids) -> + returnNF_Tc ((f, new_pat, pun), tvs, ids) + +zonkPat te (LitPat lit ty) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + returnNF_Tc (LitPat lit new_ty, emptyBag, emptyBag) + +zonkPat te (NPat lit ty expr) + = zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + zonkExpr te expr `thenNF_Tc` \ new_expr -> + returnNF_Tc (NPat lit new_ty new_expr, emptyBag, emptyBag) + +zonkPat te (NPlusKPat n k ty e1 e2) + = zonkIdBndr te n `thenNF_Tc` \ new_n -> + zonkTcTypeToType te ty `thenNF_Tc` \ new_ty -> + zonkExpr te e1 `thenNF_Tc` \ new_e1 -> + zonkExpr te e2 `thenNF_Tc` \ new_e2 -> + returnNF_Tc (NPlusKPat new_n k new_ty new_e1 new_e2, emptyBag, unitBag new_n) + +zonkPat te (DictPat ds ms) + = mapNF_Tc (zonkIdBndr te) ds `thenNF_Tc` \ new_ds -> + mapNF_Tc (zonkIdBndr te) ms `thenNF_Tc` \ new_ms -> + returnNF_Tc (DictPat new_ds new_ms, emptyBag, + listToBag new_ds `unionBags` listToBag new_ms) + + +zonkPats te [] + = returnNF_Tc ([], emptyBag, emptyBag) + +zonkPats te (pat:pats) + = zonkPat te pat `thenNF_Tc` \ (pat', tvs1, ids1) -> + zonkPats te pats `thenNF_Tc` \ (pats', tvs2, ids2) -> + returnNF_Tc (pat':pats', tvs1 `unionBags` tvs2, ids1 `unionBags` ids2) \end{code} +%************************************************************************ +%* * +\subsection[BackSubst-Foreign]{Foreign exports} +%* * +%************************************************************************ + +\begin{code} +zonkForeignExports :: [TcForeignExportDecl s] -> NF_TcM s [TypecheckedForeignDecl] +zonkForeignExports ls = mapNF_Tc zonkForeignExport ls + +zonkForeignExport :: TcForeignExportDecl s -> NF_TcM s (TypecheckedForeignDecl) +zonkForeignExport (ForeignDecl i imp_exp hs_ty ext_nm cconv src_loc) = + zonkIdOcc i `thenNF_Tc` \ i' -> + returnNF_Tc (ForeignDecl i' imp_exp undefined ext_nm cconv src_loc) + +\end{code}