%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[RnSource]{Main pass of renamer}
\begin{code}
-#include "HsVersions.h"
-
-module RnSource ( rnSource, rnTyDecl, rnClassDecl, rnInstDecl, rnPolyType ) where
+module RnSource ( rnIfaceDecl, rnSourceDecls, rnHsType, rnHsSigType ) where
-import Ubiq
-import RnLoop -- *check* the RnPass/RnExpr/RnBinds loop-breaking
+#include "HsVersions.h"
+import RnExpr
import HsSyn
+import HsDecls ( HsIdInfo(..), HsStrictnessInfo(..) )
import HsPragmas
-import RdrHsSyn
+import HsTypes ( getTyVarName, pprClassAssertion, cmpHsTypes )
+import RdrName ( RdrName, isRdrDataCon, rdrNameOcc )
+import RdrHsSyn ( RdrNameContext, RdrNameHsType, RdrNameConDecl,
+ extractHsTyVars
+ )
import RnHsSyn
+import HsCore
+
+import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs, unknownSigErr )
+import RnEnv ( bindTyVarsRn, lookupBndrRn, lookupOccRn,
+ lookupImplicitOccRn, addImplicitOccRn,
+ bindLocalsRn,
+ bindTyVarsFVRn, bindTyVarsFV2Rn, extendTyVarEnvFVRn,
+ checkDupOrQualNames, checkDupNames,
+ newLocallyDefinedGlobalName, newImportedGlobalName,
+ newImportedGlobalFromRdrName,
+ newDFunName,
+ FreeVars, emptyFVs, plusFV, plusFVs, unitFV, addOneFV
+ )
import RnMonad
-import RnBinds ( rnTopBinds, rnMethodBinds )
-import RnUtils ( lookupGlobalRnEnv, lubExportFlag )
-
-import Bag ( emptyBag, unitBag, consBag, unionManyBags, unionBags, listToBag, bagToList )
-import Class ( derivableClassKeys )
-import ErrUtils ( addErrLoc, addShortErrLocLine )
-import FiniteMap ( emptyFM, lookupFM, addListToFM_C )
-import ListSetOps ( unionLists, minusList )
-import Maybes ( maybeToBool, catMaybes )
-import Name ( Name, isLocallyDefined, isLexVarId, getLocalName, ExportFlag(..),
- nameImportFlag, RdrName, pprNonSym )
-import Outputable -- ToDo:rm
-import PprStyle -- ToDo:rm
-import PrelInfo ( consDataCon )
-import Pretty
+
+import Name ( Name, OccName,
+ ExportFlag(..), Provenance(..),
+ nameOccName, NamedThing(..),
+ mkDefaultMethodOcc, mkDFunOcc
+ )
+import NameSet
+import BasicTypes ( TopLevelFlag(..) )
+import TysWiredIn ( tupleTyCon, unboxedTupleTyCon, listTyCon )
+import Type ( funTyCon )
+import FiniteMap ( elemFM )
+import PrelInfo ( derivingOccurrences, numClass_RDR,
+ deRefStablePtr_NAME, makeStablePtr_NAME,
+ bindIO_NAME
+ )
+import Bag ( bagToList )
+import List ( partition )
+import Outputable
import SrcLoc ( SrcLoc )
-import Unique ( Unique )
-import UniqFM ( emptyUFM, addListToUFM_C, listToUFM, lookupUFM, eltsUFM )
-import UniqSet ( UniqSet(..) )
-import Util ( isIn, isn'tIn, sortLt, removeDups, cmpPString, assertPanic, pprTrace{-ToDo:rm-} )
+import CmdLineOpts ( opt_WarnUnusedMatches ) -- Warn of unused for-all'd tyvars
+import UniqFM ( lookupUFM )
+import Maybes ( maybeToBool, catMaybes )
+import Util
\end{code}
-rnSource `renames' the source module and export list.
+rnDecl `renames' declarations.
It simultaneously performs dependency analysis and precedence parsing.
It also does the following error checks:
\begin{enumerate}
\end{enumerate}
-\begin{code}
-rnSource :: [Module]
- -> Bag (Module,RnName) -- unqualified imports from module
- -> Bag RenamedFixityDecl -- fixity info for imported names
- -> RdrNameHsModule
- -> RnM s (RenamedHsModule,
- Name -> ExportFlag, -- export info
- Bag (RnName, RdrName)) -- occurrence info
-
-rnSource imp_mods unqual_imps imp_fixes
- (HsModule mod version exports _ fixes
- ty_decls specdata_sigs class_decls
- inst_decls specinst_sigs defaults
- binds _ src_loc)
-
- = pushSrcLocRn src_loc $
+%*********************************************************
+%* *
+\subsection{Value declarations}
+%* *
+%*********************************************************
- rnExports (mod:imp_mods) unqual_imps exports `thenRn` \ exported_fn ->
- rnFixes fixes `thenRn` \ src_fixes ->
- let
- all_fixes = src_fixes ++ bagToList imp_fixes
- all_fixes_fm = listToUFM (map pair_name all_fixes)
+\begin{code}
+rnSourceDecls :: [RdrNameHsDecl] -> RnMS s ([RenamedHsDecl], FreeVars)
+ -- The decls get reversed, but that's ok
- pair_name inf = (nameFixDecl inf, inf)
- in
- setExtraRn all_fixes_fm $
-
- mapRn rnTyDecl ty_decls `thenRn` \ new_ty_decls ->
- mapRn rnSpecDataSig specdata_sigs `thenRn` \ new_specdata_sigs ->
- mapRn rnClassDecl class_decls `thenRn` \ new_class_decls ->
- mapRn rnInstDecl inst_decls `thenRn` \ new_inst_decls ->
- mapRn rnSpecInstSig specinst_sigs `thenRn` \ new_specinst_sigs ->
- rnDefaultDecl defaults `thenRn` \ new_defaults ->
- rnTopBinds binds `thenRn` \ new_binds ->
-
- getOccurrenceUpRn `thenRn` \ occ_info ->
-
- returnRn (
- HsModule mod version
- trashed_exports trashed_imports all_fixes
- new_ty_decls new_specdata_sigs new_class_decls
- new_inst_decls new_specinst_sigs new_defaults
- new_binds [] src_loc,
- exported_fn,
- occ_info
- )
+rnSourceDecls decls
+ = go emptyFVs [] decls
where
- trashed_exports = {-trace "rnSource:trashed_exports"-} Nothing
- trashed_imports = {-trace "rnSource:trashed_imports"-} []
+ -- Fixity decls have been dealt with already; ignore them
+ go fvs ds' [] = returnRn (ds', fvs)
+ go fvs ds' (FixD _:ds) = go fvs ds' ds
+ go fvs ds' (d:ds) = rnDecl d `thenRn` \(d', fvs') ->
+ go (fvs `plusFV` fvs') (d':ds') ds
+
+rnIfaceDecl :: RdrNameHsDecl -> RnMS s RenamedHsDecl
+rnIfaceDecl d
+ = rnDecl d `thenRn` \ (d', fvs) ->
+ returnRn d'
\end{code}
%*********************************************************
%* *
-\subsection{Export list}
+\subsection{Value declarations}
%* *
%*********************************************************
\begin{code}
-rnExports :: [Module]
- -> Bag (Module,RnName)
- -> Maybe [RdrNameIE]
- -> RnM s (Name -> ExportFlag)
+-- rnDecl does all the work
+rnDecl :: RdrNameHsDecl -> RnMS s (RenamedHsDecl, FreeVars)
-rnExports mods unqual_imps Nothing
- = returnRn (\n -> if isLocallyDefined n then ExportAll else NotExported)
+rnDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
+ returnRn (ValD new_binds, fvs)
-rnExports mods unqual_imps (Just exps)
- = mapAndUnzipRn (rnIE mods) exps `thenRn` \ (mod_maybes, exp_bags) ->
- let
- exp_names = bagToList (unionManyBags exp_bags)
- exp_mods = catMaybes mod_maybes
-
- -- Warn for duplicate names and modules
- (uniq_exp_names, dup_names) = removeDups cmp_fst exp_names
- (uniq_exp_mods, dup_mods) = removeDups cmpPString exp_mods
- cmp_fst (x,_) (y,_) = x `cmp` y
-
- -- Build finite map of exported names to export flag
- exp_map0 = addListToUFM_C lub_expflag emptyUFM (map pair_fst uniq_exp_names)
- (exp_map1, empty_mods) = foldl add_mod_names (exp_map0, []) uniq_exp_mods
-
- mod_fm = addListToFM_C unionBags emptyFM
- [(mod, unitBag (getName rn, nameImportFlag (getName rn)))
- | (mod,rn) <- bagToList unqual_imps, isRnDecl rn]
-
- add_mod_names (exp_map, empty) mod
- = case lookupFM mod_fm mod of
- Nothing -> (exp_map, mod:empty)
- Just mod_names -> (addListToUFM_C lub_expflag exp_map (map pair_fst (bagToList mod_names)), empty)
-
- pair_fst p@(f,_) = (f,p)
- lub_expflag (n, flag1) (_, flag2) = (n, lubExportFlag flag1 flag2)
-
- -- Check for exporting of duplicate local names
- exp_locals = [(getLocalName n, n) | (n,_) <- eltsUFM exp_map1]
- (_, dup_locals) = removeDups cmp_local exp_locals
- cmp_local (x,_) (y,_) = x `cmpPString` y
-
- -- Build export flag function
- exp_fn n = case lookupUFM exp_map1 n of
- Nothing -> NotExported
- Just (_,flag) -> flag
- in
- getSrcLocRn `thenRn` \ src_loc ->
- mapRn (addWarnRn . dupNameExportWarn src_loc) dup_names `thenRn_`
- mapRn (addWarnRn . dupModExportWarn src_loc) dup_mods `thenRn_`
- mapRn (addWarnRn . emptyModExportWarn src_loc) empty_mods `thenRn_`
- mapRn (addErrRn . dupLocalsExportErr src_loc) dup_locals `thenRn_`
- returnRn exp_fn
-
-
-rnIE mods (IEVar name)
- = lookupValue name `thenRn` \ rn ->
- checkIEVar rn `thenRn` \ exps ->
- returnRn (Nothing, exps)
- where
- checkIEVar (RnName n) = returnRn (unitBag (n,ExportAll))
- checkIEVar rn@(RnClassOp _ _) = getSrcLocRn `thenRn` \ src_loc ->
- failButContinueRn emptyBag (classOpExportErr rn src_loc)
- checkIEVar rn = returnRn emptyBag
-
-rnIE mods (IEThingAbs name)
- = lookupTyConOrClass name `thenRn` \ rn ->
- checkIEAbs rn `thenRn` \ exps ->
- returnRn (Nothing, exps)
- where
- checkIEAbs (RnSyn n) = returnRn (unitBag (n,ExportAbs))
- checkIEAbs (RnData n _ _) = returnRn (unitBag (n,ExportAbs))
- checkIEAbs (RnClass n _) = returnRn (unitBag (n,ExportAbs))
- checkIEAbs rn = returnRn emptyBag
-
-rnIE mods (IEThingAll name)
- = lookupTyConOrClass name `thenRn` \ rn ->
- checkIEAll rn `thenRn` \ exps ->
- checkImportAll rn `thenRn_`
- returnRn (Nothing, exps)
- where
- checkIEAll (RnData n cons fields) = returnRn (exp_all n `consBag` listToBag (map exp_all cons)
- `unionBags` listToBag (map exp_all fields))
- checkIEAll (RnClass n ops) = returnRn (exp_all n `consBag` listToBag (map exp_all ops))
- checkIEAll rn@(RnSyn _) = getSrcLocRn `thenRn` \ src_loc ->
- warnAndContinueRn emptyBag (synAllExportErr rn src_loc)
- checkIEAll rn = returnRn emptyBag
-
- exp_all n = (n, ExportAll)
-
-rnIE mods (IEThingWith name names)
- = lookupTyConOrClass name `thenRn` \ rn ->
- mapRn lookupValue names `thenRn` \ rns ->
- checkIEWith rn rns `thenRn` \ exps ->
- checkImportAll rn `thenRn_`
- returnRn (Nothing, exps)
- where
- checkIEWith rn@(RnData n cons fields) rns
- | same_names (cons++fields) rns
- = returnRn (consBag (exp_all n) (listToBag (map exp_all cons)))
- | otherwise
- = rnWithErr "constructrs (and fields)" rn (cons++fields) rns
- checkIEWith rn@(RnClass n ops) rns
- | same_names ops rns
- = returnRn (consBag (exp_all n) (listToBag (map exp_all ops)))
- | otherwise
- = rnWithErr "class ops" rn ops rns
- checkIEWith rn@(RnSyn _) rns
- = getSrcLocRn `thenRn` \ src_loc ->
- failButContinueRn emptyBag (synAllExportErr rn src_loc)
- checkIEWith rn rns
- = returnRn emptyBag
-
- exp_all n = (n, ExportAll)
-
- same_names has rns
- = all (not.isRnUnbound) rns &&
- sortLt (<) (map uniqueOf has) == sortLt (<) (map uniqueOf rns)
-
- rnWithErr str rn has rns
- = getSrcLocRn `thenRn` \ src_loc ->
- failButContinueRn emptyBag (withExportErr str rn has rns src_loc)
-
-rnIE mods (IEModuleContents mod)
- | isIn "rnIE:IEModule" mod mods
- = returnRn (Just mod, emptyBag)
- | otherwise
- = getSrcLocRn `thenRn` \ src_loc ->
- failButContinueRn (Nothing,emptyBag) (badModExportErr mod src_loc)
+rnDecl (SigD (IfaceSig name ty id_infos loc))
+ = pushSrcLocRn loc $
+ lookupBndrRn name `thenRn` \ name' ->
+ rnIfaceType doc_str ty `thenRn` \ ty' ->
-checkImportAll rn
- = case nameImportFlag (getName rn) of
- ExportAll -> returnRn ()
- exp -> getSrcLocRn `thenRn` \ src_loc ->
- addErrRn (importAllErr rn src_loc)
+ -- Get the pragma info (if any).
+ setModeRn (InterfaceMode Optional) $
+ -- In all the rest of the signature we read in optional mode,
+ -- so that (a) we don't die
+ mapRn rnIdInfo id_infos `thenRn` \ id_infos' ->
+ returnRn (SigD (IfaceSig name' ty' id_infos' loc), emptyFVs)
+ -- Don't need free-var info for iface binds
+ where
+ doc_str = text "the interface signature for" <+> quotes (ppr name)
\end{code}
%*********************************************************
checks at the same time.
\begin{code}
-rnTyDecl :: RdrNameTyDecl -> RnM_Fixes s RenamedTyDecl
-
-rnTyDecl (TyData context tycon tyvars condecls derivings pragmas src_loc)
+rnDecl (TyClD (TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc))
= pushSrcLocRn src_loc $
- lookupTyCon tycon `thenRn` \ tycon' ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') ->
- rnContext tv_env context `thenRn` \ context' ->
- rnConDecls tv_env condecls `thenRn` \ condecls' ->
- rn_derivs tycon' src_loc derivings `thenRn` \ derivings' ->
+ lookupBndrRn tycon `thenRn` \ tycon' ->
+ bindTyVarsFVRn data_doc tyvars $ \ tyvars' ->
+ rnContext data_doc context `thenRn` \ (context', cxt_fvs) ->
+ checkDupOrQualNames data_doc con_names `thenRn_`
+ mapAndUnzipRn rnConDecl condecls `thenRn` \ (condecls', con_fvs_s) ->
+ rnDerivs derivings `thenRn` \ (derivings', deriv_fvs) ->
ASSERT(isNoDataPragmas pragmas)
- returnRn (TyData context' tycon' tyvars' condecls' derivings' noDataPragmas src_loc)
+ returnRn (TyClD (TyData new_or_data context' tycon' tyvars' condecls' derivings' noDataPragmas src_loc),
+ cxt_fvs `plusFV` plusFVs con_fvs_s `plusFV` deriv_fvs)
+ where
+ data_doc = text "the data type declaration for" <+> quotes (ppr tycon)
+ con_names = map conDeclName condecls
-rnTyDecl (TyNew context tycon tyvars condecl derivings pragmas src_loc)
+rnDecl (TyClD (TySynonym name tyvars ty src_loc))
= pushSrcLocRn src_loc $
- lookupTyCon tycon `thenRn` \ tycon' ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') ->
- rnContext tv_env context `thenRn` \ context' ->
- rnConDecls tv_env condecl `thenRn` \ condecl' ->
- rn_derivs tycon' src_loc derivings `thenRn` \ derivings' ->
- ASSERT(isNoDataPragmas pragmas)
- returnRn (TyNew context' tycon' tyvars' condecl' derivings' noDataPragmas src_loc)
+ lookupBndrRn name `thenRn` \ name' ->
+ bindTyVarsFVRn syn_doc tyvars $ \ tyvars' ->
+ rnHsType syn_doc ty `thenRn` \ (ty', ty_fvs) ->
+ returnRn (TyClD (TySynonym name' tyvars' ty' src_loc), ty_fvs)
+ where
+ syn_doc = text "the declaration for type synonym" <+> quotes (ppr name)
-rnTyDecl (TySynonym name tyvars ty src_loc)
+rnDecl (TyClD (ClassDecl context cname tyvars sigs mbinds pragmas tname dname src_loc))
= pushSrcLocRn src_loc $
- lookupTyCon name `thenRn` \ name' ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') ->
- rnMonoType tv_env ty `thenRn` \ ty' ->
- returnRn (TySynonym name' tyvars' ty' src_loc)
-rn_derivs tycon2 locn Nothing -- derivs not specified
- = returnRn Nothing
+ lookupBndrRn cname `thenRn` \ cname' ->
-rn_derivs tycon2 locn (Just ds)
- = mapRn (rn_deriv tycon2 locn) ds `thenRn` \ derivs ->
- returnRn (Just derivs)
- where
- rn_deriv tycon2 locn clas
- = lookupClass clas `thenRn` \ clas_name ->
- addErrIfRn (uniqueOf clas_name `not_elem` derivableClassKeys)
- (derivingNonStdClassErr clas locn)
- `thenRn_`
- returnRn clas_name
- where
- not_elem = isn'tIn "rn_deriv"
-\end{code}
+ -- Deal with the implicit tycon and datacon name
+ -- They aren't in scope (because they aren't visible to the user)
+ -- and what we want to do is simply look them up in the cache;
+ -- we jolly well ought to get a 'hit' there!
+ -- So the 'Imported' part of this call is not relevant.
+ -- Unclean; but since these two are the only place this happens
+ -- I can't work up the energy to do it more beautifully
+ newImportedGlobalFromRdrName tname `thenRn` \ tname' ->
+ newImportedGlobalFromRdrName dname `thenRn` \ dname' ->
-@rnConDecls@ uses the `global name function' to create a new
-constructor in which local names have been replaced by their original
-names, reporting any unknown names.
+ -- Tyvars scope over bindings and context
+ bindTyVarsFV2Rn cls_doc tyvars ( \ clas_tyvar_names tyvars' ->
-\begin{code}
-rnConDecls :: TyVarNamesEnv
- -> [RdrNameConDecl]
- -> RnM_Fixes s [RenamedConDecl]
+ -- Check the superclasses
+ rnContext cls_doc context `thenRn` \ (context', cxt_fvs) ->
+
+ -- Check the signatures
+ let
+ -- First process the class op sigs, then the fixity sigs.
+ (op_sigs, non_op_sigs) = partition isClassOpSig sigs
+ (fix_sigs, non_sigs) = partition isFixitySig non_op_sigs
+ in
+ checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_`
+ mapAndUnzipRn (rn_op cname' clas_tyvar_names) op_sigs `thenRn` \ (sigs', sig_fvs_s) ->
+ mapRn_ (unknownSigErr) non_sigs `thenRn_`
+ let
+ binders = mkNameSet [ nm | (ClassOpSig nm _ _ _) <- sigs' ]
+ in
+ renameSigs False binders lookupOccRn fix_sigs `thenRn` \ (fixs', fix_fvs) ->
+
+ -- Check the methods
+ checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_`
+ rnMethodBinds mbinds `thenRn` \ (mbinds', meth_fvs) ->
+
+ -- Typechecker is responsible for checking that we only
+ -- give default-method bindings for things in this class.
+ -- The renamer *could* check this for class decls, but can't
+ -- for instance decls.
-rnConDecls tv_env con_decls
- = mapRn rn_decl con_decls
+ ASSERT(isNoClassPragmas pragmas)
+ returnRn (TyClD (ClassDecl context' cname' tyvars' (fixs' ++ sigs') mbinds' NoClassPragmas tname' dname' src_loc),
+ plusFVs sig_fvs_s `plusFV`
+ fix_fvs `plusFV`
+ cxt_fvs `plusFV`
+ meth_fvs
+ )
+ )
where
- rn_decl (ConDecl name tys src_loc)
- = pushSrcLocRn src_loc $
- lookupConstr name `thenRn` \ new_name ->
- mapRn rn_bang_ty tys `thenRn` \ new_tys ->
- returnRn (ConDecl new_name new_tys src_loc)
-
- rn_decl (ConOpDecl ty1 op ty2 src_loc)
- = pushSrcLocRn src_loc $
- lookupConstr op `thenRn` \ new_op ->
- rn_bang_ty ty1 `thenRn` \ new_ty1 ->
- rn_bang_ty ty2 `thenRn` \ new_ty2 ->
- returnRn (ConOpDecl new_ty1 new_op new_ty2 src_loc)
-
- rn_decl (NewConDecl name ty src_loc)
- = pushSrcLocRn src_loc $
- lookupConstr name `thenRn` \ new_name ->
- rn_mono_ty ty `thenRn` \ new_ty ->
- returnRn (NewConDecl new_name new_ty src_loc)
-
- rn_decl (RecConDecl name fields src_loc)
- = pushSrcLocRn src_loc $
- lookupConstr name `thenRn` \ new_name ->
- mapRn rn_field fields `thenRn` \ new_fields ->
- returnRn (RecConDecl new_name new_fields src_loc)
-
- rn_field (names, ty)
- = mapRn lookupField names `thenRn` \ new_names ->
- rn_bang_ty ty `thenRn` \ new_ty ->
- returnRn (new_names, new_ty)
-
- rn_mono_ty = rnMonoType tv_env
- rn_poly_ty = rnPolyType tv_env
-
- rn_bang_ty (Banged ty)
- = rn_poly_ty ty `thenRn` \ new_ty ->
- returnRn (Banged new_ty)
- rn_bang_ty (Unbanged ty)
- = rn_poly_ty ty `thenRn` \ new_ty ->
- returnRn (Unbanged new_ty)
+ cls_doc = text "the declaration for class" <+> ppr cname
+ sig_doc = text "the signatures for class" <+> ppr cname
+ meth_doc = text "the default-methods for class" <+> ppr cname
+
+ sig_rdr_names_w_locs = [(op,locn) | ClassOpSig op _ _ locn <- sigs]
+ meth_rdr_names_w_locs = bagToList (collectMonoBinders mbinds)
+ meth_rdr_names = map fst meth_rdr_names_w_locs
+
+ rn_op clas clas_tyvars sig@(ClassOpSig op maybe_dm ty locn)
+ = pushSrcLocRn locn $
+ lookupBndrRn op `thenRn` \ op_name ->
+
+ -- Check the signature
+ rnHsSigType (quotes (ppr op)) ty `thenRn` \ (new_ty, op_ty_fvs) ->
+ let
+ check_in_op_ty clas_tyvar = checkRn (clas_tyvar `elemNameSet` op_ty_fvs)
+ (classTyVarNotInOpTyErr clas_tyvar sig)
+ in
+ mapRn_ check_in_op_ty clas_tyvars `thenRn_`
+
+ -- Make the default-method name
+ let
+ dm_occ = mkDefaultMethodOcc (rdrNameOcc op)
+ in
+ getModuleRn `thenRn` \ mod_name ->
+ getModeRn `thenRn` \ mode ->
+ (case (mode, maybe_dm) of
+ (SourceMode, _) | op `elem` meth_rdr_names
+ -> -- There's an explicit method decl
+ newLocallyDefinedGlobalName mod_name dm_occ
+ (\_ -> Exported) locn `thenRn` \ dm_name ->
+ returnRn (Just dm_name)
+
+ (InterfaceMode _, Just _)
+ -> -- Imported class that has a default method decl
+ newImportedGlobalName mod_name dm_occ `thenRn` \ dm_name ->
+ addOccurrenceName dm_name `thenRn_`
+ returnRn (Just dm_name)
+
+ other -> returnRn Nothing
+ ) `thenRn` \ maybe_dm_name ->
+
+
+ returnRn (ClassOpSig op_name maybe_dm_name new_ty locn, op_ty_fvs)
\end{code}
+
%*********************************************************
-%* *
-\subsection{SPECIALIZE data pragmas}
-%* *
+%* *
+\subsection{Instance declarations}
+%* *
%*********************************************************
\begin{code}
-rnSpecDataSig :: RdrNameSpecDataSig
- -> RnM_Fixes s RenamedSpecDataSig
-
-rnSpecDataSig (SpecDataSig tycon ty src_loc)
+rnDecl (InstD (InstDecl inst_ty mbinds uprags maybe_dfun src_loc))
= pushSrcLocRn src_loc $
+ rnHsSigType (text "an instance decl") inst_ty `thenRn` \ (inst_ty', inst_fvs) ->
let
- tyvars = extractMonoTyNames is_tyvar_name ty
+ inst_tyvars = case inst_ty' of
+ HsForAllTy (Just inst_tyvars) _ _ -> inst_tyvars
+ other -> []
+ -- (Slightly strangely) the forall-d tyvars scope over
+ -- the method bindings too
in
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env,_) ->
- lookupTyCon tycon `thenRn` \ tycon' ->
- rnMonoType tv_env ty `thenRn` \ ty' ->
- returnRn (SpecDataSig tycon' ty' src_loc)
+ extendTyVarEnvFVRn inst_tyvars $
-is_tyvar_name n = isLexVarId (getLocalName n)
+ -- Rename the bindings
+ -- NB meth_names can be qualified!
+ checkDupNames meth_doc meth_names `thenRn_`
+ rnMethodBinds mbinds `thenRn` \ (mbinds', meth_fvs) ->
+ let
+ binders = mkNameSet (map fst (bagToList (collectMonoBinders mbinds')))
+
+ -- Delete sigs (&report) sigs that aren't allowed inside an
+ -- instance decl:
+ --
+ -- + type signatures
+ -- + fixity decls
+ --
+ (ok_sigs, not_ok_idecl_sigs) = partition okInInstDecl uprags
+
+ okInInstDecl (FixSig _) = False
+ okInInstDecl (Sig _ _ _) = False
+ okInInstDecl _ = True
+
+ in
+ -- You can't have fixity decls & type signatures
+ -- within an instance declaration.
+ mapRn_ unknownSigErr not_ok_idecl_sigs `thenRn_`
+ renameSigs False binders lookupOccRn ok_sigs `thenRn` \ (new_uprags, prag_fvs) ->
+ mkDFunName inst_ty' maybe_dfun src_loc `thenRn` \ dfun_name ->
+ addOccurrenceName dfun_name `thenRn_`
+ -- The dfun is not optional, because we use its version number
+ -- to identify the version of the instance declaration
+
+ -- The typechecker checks that all the bindings are for the right class.
+ returnRn (InstD (InstDecl inst_ty' mbinds' new_uprags (Just dfun_name) src_loc),
+ inst_fvs `plusFV` meth_fvs `plusFV` prag_fvs)
+ where
+ meth_doc = text "the bindings in an instance declaration"
+ meth_names = bagToList (collectMonoBinders mbinds)
\end{code}
%*********************************************************
%* *
-\subsection{Class declarations}
+\subsection{Default declarations}
%* *
%*********************************************************
-@rnClassDecl@ uses the `global name function' to create a new
-class declaration in which local names have been replaced by their
-original names, reporting any unknown names.
-
\begin{code}
-rnClassDecl :: RdrNameClassDecl -> RnM_Fixes s RenamedClassDecl
-
-rnClassDecl (ClassDecl context cname tyvar sigs mbinds pragmas src_loc)
+rnDecl (DefD (DefaultDecl tys src_loc))
= pushSrcLocRn src_loc $
- mkTyVarNamesEnv src_loc [tyvar] `thenRn` \ (tv_env, [tyvar']) ->
- rnContext tv_env context `thenRn` \ context' ->
- lookupClass cname `thenRn` \ cname' ->
- mapRn (rn_op cname' tv_env) sigs `thenRn` \ sigs' ->
- rnMethodBinds cname' mbinds `thenRn` \ mbinds' ->
- ASSERT(isNoClassPragmas pragmas)
- returnRn (ClassDecl context' cname' tyvar' sigs' mbinds' NoClassPragmas src_loc)
+ rnHsTypes doc_str tys `thenRn` \ (tys', fvs) ->
+ lookupImplicitOccRn numClass_RDR `thenRn_`
+ returnRn (DefD (DefaultDecl tys' src_loc), fvs)
where
- rn_op clas tv_env (ClassOpSig op ty pragmas locn)
- = pushSrcLocRn locn $
- lookupClassOp clas op `thenRn` \ op_name ->
- rnPolyType tv_env ty `thenRn` \ new_ty ->
-
-{-
-*** Please check here that tyvar' appears in new_ty ***
-*** (used to be in tcClassSig, but it's better here)
-*** not_elem = isn'tIn "tcClassSigs"
-*** -- Check that the class type variable is mentioned
-*** checkTc (clas_tyvar `not_elem` extractTyVarTemplatesFromTy local_ty)
-*** (methodTypeLacksTyVarErr clas_tyvar (_UNPK_ op_name) src_loc) `thenTc_`
--}
-
- ASSERT(isNoClassOpPragmas pragmas)
- returnRn (ClassOpSig op_name new_ty noClassOpPragmas locn)
+ doc_str = text "a `default' declaration"
\end{code}
-
%*********************************************************
%* *
-\subsection{Instance declarations}
+\subsection{Foreign declarations}
%* *
%*********************************************************
+\begin{code}
+rnDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
+ = pushSrcLocRn src_loc $
+ lookupBndrRn name `thenRn` \ name' ->
+ (case imp_exp of
+ FoImport _ | not isDyn -> addImplicitOccRn name'
+ FoLabel -> addImplicitOccRn name'
+ FoExport | isDyn ->
+ addImplicitOccRn makeStablePtr_NAME `thenRn_`
+ addImplicitOccRn deRefStablePtr_NAME `thenRn_`
+ addImplicitOccRn bindIO_NAME `thenRn_`
+ returnRn name'
+ _ -> returnRn name') `thenRn_`
+ rnHsSigType fo_decl_msg ty `thenRn` \ (ty', fvs) ->
+ returnRn (ForD (ForeignDecl name' imp_exp ty' ext_nm cconv src_loc), fvs)
+ where
+ fo_decl_msg = ptext SLIT("a foreign declaration")
+ isDyn = isDynamic ext_nm
+
+\end{code}
-@rnInstDecl@ uses the `global name function' to create a new of
-instance declaration in which local names have been replaced by their
-original names, reporting any unknown names.
+%*********************************************************
+%* *
+\subsection{Support code for type/data declarations}
+%* *
+%*********************************************************
\begin{code}
-rnInstDecl :: RdrNameInstDecl -> RnM_Fixes s RenamedInstDecl
+rnDerivs :: Maybe [RdrName] -> RnMS s (Maybe [Name], FreeVars)
-rnInstDecl (InstDecl cname ty mbinds from_here modname uprags pragmas src_loc)
- = pushSrcLocRn src_loc $
- lookupClass cname `thenRn` \ cname' ->
+rnDerivs Nothing -- derivs not specified
+ = returnRn (Nothing, emptyFVs)
+
+rnDerivs (Just ds)
+ = mapRn rn_deriv ds `thenRn` \ derivs ->
+ returnRn (Just derivs, foldl addOneFV emptyFVs derivs)
+ where
+ rn_deriv clas
+ = lookupOccRn clas `thenRn` \ clas_name ->
- rnPolyType [] ty `thenRn` \ ty' ->
- -- [] tv_env ensures that tyvars will be foralled
+ -- Now add extra "occurrences" for things that
+ -- the deriving mechanism will later need in order to
+ -- generate code for this class.
+ case lookupUFM derivingOccurrences clas_name of
+ Nothing -> addErrRn (derivingNonStdClassErr clas_name) `thenRn_`
+ returnRn clas_name
- rnMethodBinds cname' mbinds `thenRn` \ mbinds' ->
- mapRn (rn_uprag cname') uprags `thenRn` \ new_uprags ->
+ Just occs -> mapRn_ lookupImplicitOccRn occs `thenRn_`
+ returnRn clas_name
- ASSERT(isNoInstancePragmas pragmas)
- returnRn (InstDecl cname' ty' mbinds'
- from_here modname new_uprags noInstancePragmas src_loc)
+\end{code}
+
+\begin{code}
+conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc)
+conDeclName (ConDecl n _ _ _ l) = (n,l)
+
+rnConDecl :: RdrNameConDecl -> RnMS s (RenamedConDecl, FreeVars)
+rnConDecl (ConDecl name tvs cxt details locn)
+ = pushSrcLocRn locn $
+ checkConName name `thenRn_`
+ lookupBndrRn name `thenRn` \ new_name ->
+ bindTyVarsFVRn doc tvs $ \ new_tyvars ->
+ rnContext doc cxt `thenRn` \ (new_context, cxt_fvs) ->
+ rnConDetails doc locn details `thenRn` \ (new_details, det_fvs) ->
+ returnRn (ConDecl new_name new_tyvars new_context new_details locn,
+ cxt_fvs `plusFV` det_fvs)
where
- rn_uprag class_name (SpecSig op ty using locn)
- = pushSrcLocRn src_loc $
- lookupClassOp class_name op `thenRn` \ op_name ->
- rnPolyType nullTyVarNamesEnv ty `thenRn` \ new_ty ->
- rn_using using `thenRn` \ new_using ->
- returnRn (SpecSig op_name new_ty new_using locn)
-
- rn_uprag class_name (InlineSig op locn)
- = pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
- returnRn (InlineSig op_name locn)
+ doc = text "the definition of data constructor" <+> quotes (ppr name)
- rn_uprag class_name (DeforestSig op locn)
- = pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
- returnRn (DeforestSig op_name locn)
+rnConDetails doc locn (VanillaCon tys)
+ = mapAndUnzipRn (rnBangTy doc) tys `thenRn` \ (new_tys, fvs_s) ->
+ returnRn (VanillaCon new_tys, plusFVs fvs_s)
- rn_uprag class_name (MagicUnfoldingSig op str locn)
- = pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
- returnRn (MagicUnfoldingSig op_name str locn)
-
- rn_using Nothing
- = returnRn Nothing
- rn_using (Just v)
- = lookupValue v `thenRn` \ new_v ->
- returnRn (Just new_v)
+rnConDetails doc locn (InfixCon ty1 ty2)
+ = rnBangTy doc ty1 `thenRn` \ (new_ty1, fvs1) ->
+ rnBangTy doc ty2 `thenRn` \ (new_ty2, fvs2) ->
+ returnRn (InfixCon new_ty1 new_ty2, fvs1 `plusFV` fvs2)
+
+rnConDetails doc locn (NewCon ty mb_field)
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
+ rn_field mb_field `thenRn` \ new_mb_field ->
+ returnRn (NewCon new_ty new_mb_field, fvs)
+ where
+ rn_field Nothing = returnRn Nothing
+ rn_field (Just f) =
+ lookupBndrRn f `thenRn` \ new_f ->
+ returnRn (Just new_f)
+
+rnConDetails doc locn (RecCon fields)
+ = checkDupOrQualNames doc field_names `thenRn_`
+ mapAndUnzipRn (rnField doc) fields `thenRn` \ (new_fields, fvs_s) ->
+ returnRn (RecCon new_fields, plusFVs fvs_s)
+ where
+ field_names = [(fld, locn) | (flds, _) <- fields, fld <- flds]
+
+rnField doc (names, ty)
+ = mapRn lookupBndrRn names `thenRn` \ new_names ->
+ rnBangTy doc ty `thenRn` \ (new_ty, fvs) ->
+ returnRn ((new_names, new_ty), fvs)
+
+rnBangTy doc (Banged ty)
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
+ returnRn (Banged new_ty, fvs)
+
+rnBangTy doc (Unbanged ty)
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
+ returnRn (Unbanged new_ty, fvs)
+
+rnBangTy doc (Unpacked ty)
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
+ returnRn (Unpacked new_ty, fvs)
+
+-- This data decl will parse OK
+-- data T = a Int
+-- treating "a" as the constructor.
+-- It is really hard to make the parser spot this malformation.
+-- So the renamer has to check that the constructor is legal
+--
+-- We can get an operator as the constructor, even in the prefix form:
+-- data T = :% Int Int
+-- from interface files, which always print in prefix form
+
+checkConName name
+ = checkRn (isRdrDataCon name)
+ (badDataCon name)
\end{code}
+
%*********************************************************
%* *
-\subsection{@SPECIALIZE instance@ user-pragmas}
+\subsection{Naming a dfun}
%* *
%*********************************************************
+Make a name for the dict fun for an instance decl
+
\begin{code}
-rnSpecInstSig :: RdrNameSpecInstSig
- -> RnM_Fixes s RenamedSpecInstSig
+mkDFunName :: RenamedHsType -- Instance type
+ -> Maybe RdrName -- Dfun thing from decl; Nothing <=> source
+ -> SrcLoc
+ -> RnMS s Name
-rnSpecInstSig (SpecInstSig clas ty src_loc)
- = pushSrcLocRn src_loc $
- let
- tyvars = extractMonoTyNames is_tyvar_name ty
- in
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env,_) ->
- lookupClass clas `thenRn` \ new_clas ->
- rnMonoType tv_env ty `thenRn` \ new_ty ->
- returnRn (SpecInstSig new_clas new_ty src_loc)
+mkDFunName inst_ty maybe_df src_loc
+ = newDFunName cl_occ tycon_occ maybe_df src_loc
+ where
+ (cl_occ, tycon_occ) = get_key inst_ty
+
+ get_key (HsForAllTy _ _ ty) = get_key ty
+ get_key (MonoFunTy _ ty) = get_key ty
+ get_key (MonoDictTy cls (ty:_)) = (nameOccName cls, get_tycon_key ty)
+
+ get_tycon_key (MonoTyVar tv) = nameOccName (getName tv)
+ get_tycon_key (MonoTyApp ty _) = get_tycon_key ty
+ get_tycon_key (MonoTupleTy tys True) = getOccName (tupleTyCon (length tys))
+ get_tycon_key (MonoTupleTy tys False) = getOccName (unboxedTupleTyCon (length tys))
+ get_tycon_key (MonoListTy _) = getOccName listTyCon
+ get_tycon_key (MonoFunTy _ _) = getOccName funTyCon
\end{code}
+
%*********************************************************
%* *
-\subsection{Default declarations}
+\subsection{Support code to rename types}
%* *
%*********************************************************
-@rnDefaultDecl@ uses the `global name function' to create a new set
-of default declarations in which local names have been replaced by
-their original names, reporting any unknown names.
-
\begin{code}
-rnDefaultDecl :: [RdrNameDefaultDecl] -> RnM_Fixes s [RenamedDefaultDecl]
+rnHsSigType :: SDoc -> RdrNameHsType -> RnMS s (RenamedHsType, FreeVars)
+ -- rnHsSigType is used for source-language type signatures,
+ -- which use *implicit* universal quantification.
+rnHsSigType doc_str ty
+ = rnHsType (text "the type signature for" <+> doc_str) ty
+
+rnIfaceType :: SDoc -> RdrNameHsType -> RnMS s RenamedHsType
+rnIfaceType doc ty
+ = rnHsType doc ty `thenRn` \ (ty,_) ->
+ returnRn ty
+
+
+rnForAll doc forall_tyvars ctxt ty
+ = bindTyVarsFVRn doc forall_tyvars $ \ new_tyvars ->
+ rnContext doc ctxt `thenRn` \ (new_ctxt, cxt_fvs) ->
+ rnHsType doc ty `thenRn` \ (new_ty, ty_fvs) ->
+ returnRn (mkHsForAllTy new_tyvars new_ctxt new_ty,
+ cxt_fvs `plusFV` ty_fvs)
+
+-- Check that each constraint mentions at least one of the forall'd type variables
+-- Since the forall'd type variables are a subset of the free tyvars
+-- of the tau-type part, this guarantees that every constraint mentions
+-- at least one of the free tyvars in ty
+checkConstraints explicit_forall doc forall_tyvars ctxt ty
+ = mapRn check ctxt `thenRn` \ maybe_ctxt' ->
+ returnRn (catMaybes maybe_ctxt')
+ -- Remove problem ones, to avoid duplicate error message.
+ where
+ check ct@(_,tys)
+ | forall_mentioned = returnRn (Just ct)
+ | otherwise = addErrRn (ctxtErr explicit_forall doc forall_tyvars ct ty) `thenRn_`
+ returnRn Nothing
+ where
+ forall_mentioned = foldr ((||) . any (`elem` forall_tyvars) . extractHsTyVars)
+ False
+ tys
+
+
+rnHsType :: SDoc -> RdrNameHsType -> RnMS s (RenamedHsType, FreeVars)
+
+rnHsType doc (HsForAllTy Nothing ctxt ty)
+ -- From source code (no kinds on tyvars)
+ -- Given the signature C => T we universally quantify
+ -- over FV(T) \ {in-scope-tyvars}
+ = getLocalNameEnv `thenRn` \ name_env ->
+ let
+ mentioned_tyvars = extractHsTyVars ty
+ forall_tyvars = filter (not . (`elemFM` name_env)) mentioned_tyvars
+ in
+ checkConstraints False doc forall_tyvars ctxt ty `thenRn` \ ctxt' ->
+ rnForAll doc (map UserTyVar forall_tyvars) ctxt' ty
+
+rnHsType doc (HsForAllTy (Just forall_tyvars) ctxt ty)
+ -- Explicit quantification.
+ -- Check that the forall'd tyvars are a subset of the
+ -- free tyvars in the tau-type part
+ -- That's only a warning... unless the tyvar is constrained by a
+ -- context in which case it's an error
+ = let
+ mentioned_tyvars = extractHsTyVars ty
+ constrained_tyvars = [tv | (_,tys) <- ctxt,
+ ty <- tys,
+ tv <- extractHsTyVars ty]
+ dubious_guys = filter (`notElem` mentioned_tyvars) forall_tyvar_names
+ (bad_guys, warn_guys) = partition (`elem` constrained_tyvars) dubious_guys
+ forall_tyvar_names = map getTyVarName forall_tyvars
+ in
+ mapRn_ (forAllErr doc ty) bad_guys `thenRn_`
+ mapRn_ (forAllWarn doc ty) warn_guys `thenRn_`
+ checkConstraints True doc forall_tyvar_names ctxt ty `thenRn` \ ctxt' ->
+ rnForAll doc forall_tyvars ctxt' ty
+
+rnHsType doc (MonoTyVar tyvar)
+ = lookupOccRn tyvar `thenRn` \ tyvar' ->
+ returnRn (MonoTyVar tyvar', unitFV tyvar')
+
+rnHsType doc (MonoFunTy ty1 ty2)
+ = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
+ rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
+ returnRn (MonoFunTy ty1' ty2', fvs1 `plusFV` fvs2)
+
+rnHsType doc (MonoListTy ty)
+ = addImplicitOccRn listTyCon_name `thenRn_`
+ rnHsType doc ty `thenRn` \ (ty', fvs) ->
+ returnRn (MonoListTy ty', fvs `addOneFV` listTyCon_name)
+
+rnHsType doc (MonoTupleTy tys boxed)
+ = addImplicitOccRn tup_con_name `thenRn_`
+ rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
+ returnRn (MonoTupleTy tys' boxed, fvs `addOneFV` tup_con_name)
+ where
+ tup_con_name = tupleTyCon_name boxed (length tys)
-rnDefaultDecl [] = returnRn []
-rnDefaultDecl [DefaultDecl tys src_loc]
- = pushSrcLocRn src_loc $
- mapRn (rnMonoType nullTyVarNamesEnv) tys `thenRn` \ tys' ->
- returnRn [DefaultDecl tys' src_loc]
-rnDefaultDecl defs@(d:ds)
- = addErrRn (dupDefaultDeclErr defs) `thenRn_`
- rnDefaultDecl [d]
+rnHsType doc (MonoTyApp ty1 ty2)
+ = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
+ rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
+ returnRn (MonoTyApp ty1' ty2', fvs1 `plusFV` fvs2)
+
+rnHsType doc (MonoDictTy clas tys)
+ = lookupOccRn clas `thenRn` \ clas' ->
+ rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
+ returnRn (MonoDictTy clas' tys', fvs `addOneFV` clas')
+
+rnHsTypes doc tys
+ = mapAndUnzipRn (rnHsType doc) tys `thenRn` \ (tys, fvs_s) ->
+ returnRn (tys, plusFVs fvs_s)
\end{code}
-%*************************************************************************
-%* *
-\subsection{Fixity declarations}
-%* *
-%*************************************************************************
\begin{code}
-rnFixes :: [RdrNameFixityDecl] -> RnM s [RenamedFixityDecl]
+rnContext :: SDoc -> RdrNameContext -> RnMS s (RenamedContext, FreeVars)
-rnFixes fixities
- = getSrcLocRn `thenRn` \ src_loc ->
+rnContext doc ctxt
+ = mapAndUnzipRn rn_ctxt ctxt `thenRn` \ (theta, fvs_s) ->
let
- (_, dup_fixes) = removeDups cmp_fix fixities
- cmp_fix fix1 fix2 = nameFixDecl fix1 `cmp` nameFixDecl fix2
-
- rn_fixity fix@(InfixL name i)
- = rn_fixity_pieces InfixL name i fix
- rn_fixity fix@(InfixR name i)
- = rn_fixity_pieces InfixR name i fix
- rn_fixity fix@(InfixN name i)
- = rn_fixity_pieces InfixN name i fix
-
- rn_fixity_pieces mk_fixity name i fix
- = getRnEnv `thenRn` \ env ->
- case lookupGlobalRnEnv env name of
- Just res | isLocallyDefined res
- -> returnRn (Just (mk_fixity res i))
- _ -> failButContinueRn Nothing (undefinedFixityDeclErr src_loc fix)
+ (_, dup_asserts) = removeDups cmp_assert theta
in
- mapRn (addErrRn . dupFixityDeclErr src_loc) dup_fixes `thenRn_`
- mapRn rn_fixity fixities `thenRn` \ fixes_maybe ->
- returnRn (catMaybes fixes_maybe)
+ -- Check for duplicate assertions
+ -- If this isn't an error, then it ought to be:
+ mapRn_ (addWarnRn . dupClassAssertWarn theta) dup_asserts `thenRn_`
+
+ returnRn (theta, plusFVs fvs_s)
+ where
+ rn_ctxt (clas, tys)
+ = lookupOccRn clas `thenRn` \ clas_name ->
+ rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
+ returnRn ((clas_name, tys'), fvs `addOneFV` clas_name)
-nameFixDecl (InfixL name i) = name
-nameFixDecl (InfixR name i) = name
-nameFixDecl (InfixN name i) = name
+ cmp_assert (c1,tys1) (c2,tys2)
+ = (c1 `compare` c2) `thenCmp` (cmpHsTypes compare tys1 tys2)
\end{code}
+
%*********************************************************
%* *
-\subsection{Support code to rename types}
+\subsection{IdInfo}
%* *
%*********************************************************
\begin{code}
-rnPolyType :: TyVarNamesEnv
- -> RdrNamePolyType
- -> RnM_Fixes s RenamedPolyType
+rnIdInfo (HsStrictness str) = returnRn (HsStrictness str)
+
+rnIdInfo (HsWorker worker cons)
+ -- The sole purpose of the "cons" field is so that we can mark the
+ -- constructors needed to build the wrapper as "needed", so that their
+ -- data type decl will be slurped in. After that their usefulness is
+ -- o'er, so we just put in the empty list.
+ = lookupOccRn worker `thenRn` \ worker' ->
+ mapRn lookupOccRn cons `thenRn_`
+ returnRn (HsWorker worker' [])
+
+rnIdInfo (HsUnfold inline (Just expr)) = rnCoreExpr expr `thenRn` \ expr' ->
+ returnRn (HsUnfold inline (Just expr'))
+rnIdInfo (HsUnfold inline Nothing) = returnRn (HsUnfold inline Nothing)
+rnIdInfo (HsArity arity) = returnRn (HsArity arity)
+rnIdInfo (HsUpdate update) = returnRn (HsUpdate update)
+rnIdInfo (HsNoCafRefs) = returnRn (HsNoCafRefs)
+rnIdInfo (HsCprInfo cpr_info) = returnRn (HsCprInfo cpr_info)
+rnIdInfo (HsSpecialise tyvars tys expr)
+ = bindTyVarsRn doc tyvars $ \ tyvars' ->
+ rnCoreExpr expr `thenRn` \ expr' ->
+ mapRn (rnIfaceType doc) tys `thenRn` \ tys' ->
+ returnRn (HsSpecialise tyvars' tys' expr')
+ where
+ doc = text "Specialise in interface pragma"
+\end{code}
-rnPolyType tv_env (HsForAllTy tvs ctxt ty)
- = rn_poly_help tv_env tvs ctxt ty
+UfCore expressions.
-rnPolyType tv_env (HsPreForAllTy ctxt ty)
- = rn_poly_help tv_env forall_tyvars ctxt ty
+\begin{code}
+rnCoreExpr (UfType ty)
+ = rnIfaceType (text "unfolding type") ty `thenRn` \ ty' ->
+ returnRn (UfType ty')
+
+rnCoreExpr (UfVar v)
+ = lookupOccRn v `thenRn` \ v' ->
+ returnRn (UfVar v')
+
+rnCoreExpr (UfCon con args)
+ = rnUfCon con `thenRn` \ con' ->
+ mapRn rnCoreExpr args `thenRn` \ args' ->
+ returnRn (UfCon con' args')
+
+rnCoreExpr (UfTuple con args)
+ = lookupOccRn con `thenRn` \ con' ->
+ mapRn rnCoreExpr args `thenRn` \ args' ->
+ returnRn (UfTuple con' args')
+
+rnCoreExpr (UfApp fun arg)
+ = rnCoreExpr fun `thenRn` \ fun' ->
+ rnCoreExpr arg `thenRn` \ arg' ->
+ returnRn (UfApp fun' arg')
+
+rnCoreExpr (UfCase scrut bndr alts)
+ = rnCoreExpr scrut `thenRn` \ scrut' ->
+ bindLocalsRn "a UfCase" [bndr] $ \ [bndr'] ->
+ mapRn rnCoreAlt alts `thenRn` \ alts' ->
+ returnRn (UfCase scrut' bndr' alts')
+
+rnCoreExpr (UfNote note expr)
+ = rnNote note `thenRn` \ note' ->
+ rnCoreExpr expr `thenRn` \ expr' ->
+ returnRn (UfNote note' expr')
+
+rnCoreExpr (UfLam bndr body)
+ = rnCoreBndr bndr $ \ bndr' ->
+ rnCoreExpr body `thenRn` \ body' ->
+ returnRn (UfLam bndr' body')
+
+rnCoreExpr (UfLet (UfNonRec bndr rhs) body)
+ = rnCoreExpr rhs `thenRn` \ rhs' ->
+ rnCoreBndr bndr $ \ bndr' ->
+ rnCoreExpr body `thenRn` \ body' ->
+ returnRn (UfLet (UfNonRec bndr' rhs') body')
+
+rnCoreExpr (UfLet (UfRec pairs) body)
+ = rnCoreBndrs bndrs $ \ bndrs' ->
+ mapRn rnCoreExpr rhss `thenRn` \ rhss' ->
+ rnCoreExpr body `thenRn` \ body' ->
+ returnRn (UfLet (UfRec (bndrs' `zip` rhss')) body')
where
- mentioned_tyvars = extractCtxtTyNames ctxt `unionLists` extractMonoTyNames is_tyvar_name ty
- forall_tyvars = {-
- pprTrace "mentioned:" (ppCat (map (ppr PprShowAll) mentioned_tyvars)) $
- pprTrace "from_ty:" (ppCat (map (ppr PprShowAll) (extractMonoTyNames is_tyvar_name ty))) $
- -}
- mentioned_tyvars `minusList` domTyVarNamesEnv tv_env
-
-------------
-rn_poly_help :: TyVarNamesEnv
- -> [RdrName]
- -> RdrNameContext
- -> RdrNameMonoType
- -> RnM_Fixes s RenamedPolyType
-
-rn_poly_help tv_env tyvars ctxt ty
- = {-
- pprTrace "rnPolyType:"
- (ppCat [ppCat (map (ppr PprShowAll . snd) tv_env),
- ppStr ";tvs=", ppCat (map (ppr PprShowAll) tyvars),
- ppStr ";ctxt=", ppCat (map (ppr PprShowAll) ctxt),
- ppStr ";ty=", ppr PprShowAll ty]) $
- -}
- getSrcLocRn `thenRn` \ src_loc ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env1, new_tyvars) ->
- let
- tv_env2 = catTyVarNamesEnvs tv_env1 tv_env
- in
- rnContext tv_env2 ctxt `thenRn` \ new_ctxt ->
- rnMonoType tv_env2 ty `thenRn` \ new_ty ->
- returnRn (HsForAllTy new_tyvars new_ctxt new_ty)
+ (bndrs, rhss) = unzip pairs
\end{code}
\begin{code}
-rnMonoType :: TyVarNamesEnv
- -> RdrNameMonoType
- -> RnM_Fixes s RenamedMonoType
+rnCoreBndr (UfValBinder name ty) thing_inside
+ = rnIfaceType (text str) ty `thenRn` \ ty' ->
+ bindLocalsRn str [name] $ \ [name'] ->
+ thing_inside (UfValBinder name' ty')
+ where
+ str = "unfolding id"
+
+rnCoreBndr (UfTyBinder name kind) thing_inside
+ = bindLocalsRn "an unfolding tyvar" [name] $ \ [name'] ->
+ thing_inside (UfTyBinder name' kind)
+
+rnCoreBndrs bndrs thing_inside -- Expect them all to be ValBinders
+ = mapRn (rnIfaceType (text str)) tys `thenRn` \ tys' ->
+ bindLocalsRn str names $ \ names' ->
+ thing_inside (zipWith UfValBinder names' tys')
+ where
+ str = "unfolding id"
+ names = map (\ (UfValBinder name _ ) -> name) bndrs
+ tys = map (\ (UfValBinder _ ty) -> ty) bndrs
+\end{code}
-rnMonoType tv_env (MonoTyVar tyvar)
- = lookupTyVarName tv_env tyvar `thenRn` \ tyvar' ->
- returnRn (MonoTyVar tyvar')
+\begin{code}
+rnCoreAlt (con, bndrs, rhs)
+ = rnUfCon con `thenRn` \ con' ->
+ bindLocalsRn "an unfolding alt" bndrs $ \ bndrs' ->
+ rnCoreExpr rhs `thenRn` \ rhs' ->
+ returnRn (con', bndrs', rhs')
-rnMonoType tv_env (MonoListTy ty)
- = rnMonoType tv_env ty `thenRn` \ ty' ->
- returnRn (MonoListTy ty')
-rnMonoType tv_env (MonoFunTy ty1 ty2)
- = andRn MonoFunTy (rnMonoType tv_env ty1)
- (rnMonoType tv_env ty2)
+rnNote (UfCoerce ty)
+ = rnIfaceType (text "unfolding coerce") ty `thenRn` \ ty' ->
+ returnRn (UfCoerce ty')
-rnMonoType tv_env (MonoTupleTy tys)
- = mapRn (rnMonoType tv_env) tys `thenRn` \ tys' ->
- returnRn (MonoTupleTy tys')
+rnNote (UfSCC cc) = returnRn (UfSCC cc)
+rnNote UfInlineCall = returnRn UfInlineCall
-rnMonoType tv_env (MonoTyApp name tys)
- = let
- lookup_fn = if isLexVarId (getLocalName name)
- then lookupTyVarName tv_env
- else lookupTyCon
- in
- lookup_fn name `thenRn` \ name' ->
- mapRn (rnMonoType tv_env) tys `thenRn` \ tys' ->
- returnRn (MonoTyApp name' tys')
-\end{code}
-\begin{code}
-rnContext :: TyVarNamesEnv -> RdrNameContext -> RnM_Fixes s RenamedContext
+rnUfCon UfDefault
+ = returnRn UfDefault
-rnContext tv_env ctxt
- = mapRn rn_ctxt ctxt
- where
- rn_ctxt (clas, tyvar)
- = lookupClass clas `thenRn` \ clas_name ->
- lookupTyVarName tv_env tyvar `thenRn` \ tyvar_name ->
- returnRn (clas_name, tyvar_name)
-\end{code}
+rnUfCon (UfDataCon con)
+ = lookupOccRn con `thenRn` \ con' ->
+ returnRn (UfDataCon con')
+rnUfCon (UfLitCon lit)
+ = returnRn (UfLitCon lit)
-\begin{code}
-dupNameExportWarn locn names@((n,_):_)
- = addShortErrLocLine locn (\ sty ->
- ppCat [pprNonSym sty n, ppStr "exported", ppInt (length names), ppStr "times"])
-
-dupLocalsExportErr locn locals@((str,_):_)
- = addErrLoc locn "exported names have same local name" (\ sty ->
- ppInterleave ppSP (map (pprNonSym sty . snd) locals))
-
-classOpExportErr op locn
- = addShortErrLocLine locn (\ sty ->
- ppBesides [ppStr "class operation `", ppr sty op, ppStr "' can only be exported with class"])
-
-synAllExportErr syn locn
- = addShortErrLocLine locn (\ sty ->
- ppBesides [ppStr "type synonym `", ppr sty syn, ppStr "' should be exported abstractly"])
-
-withExportErr str rn has rns locn
- = addErrLoc locn "" (\ sty ->
- ppAboves [ ppBesides [ppStr "inconsistent list of", ppStr str, ppStr "in export list for `", ppr sty rn, ppStr "'"],
- ppCat [ppStr " expected:", ppInterleave ppComma (map (ppr sty) has)],
- ppCat [ppStr " found: ", ppInterleave ppComma (map (ppr sty) rns)] ])
-
-importAllErr rn locn
- = addShortErrLocLine locn (\ sty ->
- ppBesides [ ppStr "`", pprNonSym sty rn, ppStr "' has been exported with (..), but is only imported abstractly"])
-
-badModExportErr mod locn
- = addShortErrLocLine locn (\ sty ->
- ppCat [ ppStr "unknown module in export list:", ppPStr mod])
-
-dupModExportWarn locn mods@(mod:_)
- = addShortErrLocLine locn (\ sty ->
- ppCat [ppStr "module", ppPStr mod, ppStr "appears", ppInt (length mods), ppStr "times in export list"])
-
-emptyModExportWarn locn mod
- = addShortErrLocLine locn (\ sty ->
- ppCat [ppStr "module", ppPStr mod, ppStr "has no unqualified imports to export"])
-
-derivingNonStdClassErr clas locn
- = addShortErrLocLine locn (\ sty ->
- ppCat [ppStr "non-standard class in deriving:", ppr sty clas])
-
-dupDefaultDeclErr (DefaultDecl _ locn1 : dup_things) sty
- = ppAboves (item1 : map dup_item dup_things)
- where
- item1
- = addShortErrLocLine locn1 (\ sty -> ppStr "multiple default declarations") sty
+rnUfCon (UfLitLitCon lit ty)
+ = rnIfaceType (text "litlit") ty `thenRn` \ ty' ->
+ returnRn (UfLitLitCon lit ty')
- dup_item (DefaultDecl _ locn)
- = addShortErrLocLine locn (\ sty -> ppStr "here was another default declaration") sty
+rnUfCon (UfPrimOp op)
+ = lookupOccRn op `thenRn` \ op' ->
+ returnRn (UfPrimOp op')
-undefinedFixityDeclErr locn decl
- = addErrLoc locn "fixity declaration for unknown operator" (\ sty ->
- ppr sty decl)
+rnUfCon (UfCCallOp str is_dyn casm gc)
+ = returnRn (UfCCallOp str is_dyn casm gc)
+\end{code}
-dupFixityDeclErr locn dups
- = addErrLoc locn "multiple fixity declarations for same operator" (\ sty ->
- ppAboves (map (ppr sty) dups))
+%*********************************************************
+%* *
+\subsection{Errors}
+%* *
+%*********************************************************
+
+\begin{code}
+derivingNonStdClassErr clas
+ = hsep [ptext SLIT("non-standard class"), ppr clas, ptext SLIT("in deriving clause")]
+
+classTyVarNotInOpTyErr clas_tyvar sig
+ = hang (hsep [ptext SLIT("Class type variable"),
+ quotes (ppr clas_tyvar),
+ ptext SLIT("does not appear in method signature")])
+ 4 (ppr sig)
+
+dupClassAssertWarn ctxt (assertion : dups)
+ = sep [hsep [ptext SLIT("Duplicate class assertion"),
+ quotes (pprClassAssertion assertion),
+ ptext SLIT("in the context:")],
+ nest 4 (pprContext ctxt <+> ptext SLIT("..."))]
+
+badDataCon name
+ = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
+
+forAllWarn doc ty tyvar
+ | not opt_WarnUnusedMatches = returnRn ()
+ | otherwise
+ = addWarnRn (
+ sep [ptext SLIT("The universally quantified type variable") <+> quotes (ppr tyvar),
+ nest 4 (ptext SLIT("does not appear in the type") <+> quotes (ppr ty))]
+ $$
+ (ptext SLIT("In") <+> doc))
+
+forAllErr doc ty tyvar
+ = addErrRn (
+ sep [ptext SLIT("The constrained type variable") <+> quotes (ppr tyvar),
+ nest 4 (ptext SLIT("does not appear in the type") <+> quotes (ppr ty))]
+ $$
+ (ptext SLIT("In") <+> doc))
+
+ctxtErr explicit_forall doc tyvars constraint ty
+ = sep [ptext SLIT("The constraint") <+> quotes (pprClassAssertion constraint) <+>
+ ptext SLIT("does not mention any of"),
+ if explicit_forall then
+ nest 4 (ptext SLIT("the universally quantified type variables") <+> braces (interpp'SP tyvars))
+ else
+ nest 4 (ptext SLIT("the type variables in the type") <+> quotes (ppr ty))
+ ]
+ $$
+ (ptext SLIT("In") <+> doc)
\end{code}
projects / ghc-hetmet.git / blobdiff