X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnSource.lhs;h=97798b76a83a75f38daf00e7c718013521bba9ce;hb=398284dc1582b2f5df9aa8bbd786f3db67d4f4a3;hp=277862f3bf0e4da3390dcea8318692d494b9cea0;hpb=573ef10b2afd99d3c6a36370a9367609716c97d2;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnSource.lhs b/ghc/compiler/rename/RnSource.lhs index 277862f..97798b7 100644 --- a/ghc/compiler/rename/RnSource.lhs +++ b/ghc/compiler/rename/RnSource.lhs @@ -4,45 +4,48 @@ \section[RnSource]{Main pass of renamer} \begin{code} -#include "HsVersions.h" - -module RnSource ( rnSource, rnTyDecl, rnClassDecl, rnInstDecl, rnPolyType ) where +module RnSource ( rnDecl, rnHsType, rnHsSigType ) where -IMP_Ubiq() -IMPORT_DELOOPER(RnLoop) -- *check* the RnPass/RnExpr/RnBinds loop-breaking -IMPORT_1_3(List(partition)) +#include "HsVersions.h" +import RnExpr import HsSyn +import HsDecls ( HsIdInfo(..), HsStrictnessInfo(..) ) import HsPragmas +import HsTypes ( getTyVarName, pprClassAssertion, cmpHsTypes ) import RdrHsSyn import RnHsSyn -import RnMonad +import HsCore +import CmdLineOpts ( opt_IgnoreIfacePragmas ) + import RnBinds ( rnTopBinds, rnMethodBinds ) -import RnUtils ( getLocalsFromRnEnv, lookupGlobalRnEnv, lubExportFlag ) - -import Bag ( emptyBag, unitBag, consBag, unionManyBags, unionBags, listToBag, bagToList ) -import Class ( derivableClassKeys ) -import CmdLineOpts ( opt_CompilingGhcInternals ) -import ErrUtils ( addErrLoc, addShortErrLocLine, addShortWarnLocLine ) -import FiniteMap ( emptyFM, lookupFM, addListToFM_C ) -import Id ( isDataCon, GenId{-instance NamedThing-} ) -import ListSetOps ( unionLists, minusList ) -import Maybes ( maybeToBool, catMaybes ) -import Name ( isLocallyDefined, isLexVarId, getLocalName, ExportFlag(..), - nameImportFlag, RdrName, pprNonSym, Name ) -import Outputable -- ToDo:rm -import PprStyle -- ToDo:rm -import Pretty +import RnEnv ( bindTyVarsRn, lookupBndrRn, lookupOccRn, lookupImplicitOccRn, bindLocalsRn, + newDfunName, checkDupOrQualNames, checkDupNames, + newLocallyDefinedGlobalName, newImportedGlobalName, ifaceFlavour, + listType_RDR, tupleType_RDR ) +import RnMonad + +import Name ( Name, OccName(..), occNameString, prefixOccName, + ExportFlag(..), Provenance(..), NameSet, + elemNameSet, nameOccName, NamedThing(..) + ) +import FiniteMap ( lookupFM ) +import Id ( GenId{-instance NamedThing-} ) +import IdInfo ( FBTypeInfo, ArgUsageInfo ) +import Lex ( isLexCon ) +import PrelInfo ( derivingOccurrences, evalClass_RDR, numClass_RDR, allClass_NAME ) +import Maybes ( maybeToBool ) +import Bag ( bagToList ) +import Outputable import SrcLoc ( SrcLoc ) -import TyCon ( tyConDataCons, TyCon{-instance NamedThing-} ) import Unique ( Unique ) -import UniqFM ( emptyUFM, addListToUFM_C, listToUFM, plusUFM, lookupUFM, eltsUFM ) -import UniqSet ( SYN_IE(UniqSet) ) -import Util ( isIn, isn'tIn, thenCmp, sortLt, removeDups, mapAndUnzip3, cmpPString, - panic, assertPanic, pprTrace{-ToDo:rm-} ) +import UniqSet ( UniqSet ) +import UniqFM ( UniqFM, lookupUFM ) +import Util +import List ( partition, nub ) \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} @@ -56,277 +59,31 @@ Checks the (..) etc constraints in the export list. \end{enumerate} -\begin{code} -rnSource :: [Module] -- imported modules - -> Bag (Module,RnName) -- unqualified imports from module - -> Bag RenamedFixityDecl -- fixity info for imported names - -> RdrNameHsModule - -> RnM s (RenamedHsModule, - Name -> ExportFlag, -- export info - ([(Name, ExportFlag)], -- export module X stuff - [(Name, ExportFlag)]), - 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 $ - - rnExports (mod:imp_mods) unqual_imps exports `thenRn` \ (exported_fn, module_dotdots) -> - rnFixes fixes `thenRn` \ src_fixes -> - let - all_fixes = src_fixes ++ bagToList imp_fixes - all_fixes_fm = listToUFM (map pair_name all_fixes) - - pair_name inf = (fixDeclName 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, module_dotdots, - occ_info - ) - where - trashed_exports = {-trace "rnSource:trashed_exports"-} Nothing - trashed_imports = {-trace "rnSource:trashed_imports"-} [] -\end{code} - - %********************************************************* %* * -\subsection{Export list} +\subsection{Value declarations} %* * %********************************************************* \begin{code} -rnExports :: [Module] - -> Bag (Module,RnName) - -> Maybe [RdrNameIE] - -> RnM s (Name -> ExportFlag, -- main export-flag fun - ([(Name,ExportFlag)], -- info about "module X" exports - [(Name,ExportFlag)]) - ) - -rnExports mods unqual_imps Nothing - = returnRn (\n -> if isLocallyDefined n then ExportAll else NotExported - , ([], []) - ) - -rnExports mods unqual_imps (Just exps) - = getModuleRn `thenRn` \ this_mod -> - getRnEnv `thenRn` \ rn_env -> - mapAndUnzipRn (rnIE mods) exps `thenRn` \ (mod_maybes, exp_bags) -> - let - (tc_bags, val_bags) = unzip exp_bags - tc_names = bagToList (unionManyBags tc_bags) - val_names = bagToList (unionManyBags val_bags) - exp_mods = catMaybes mod_maybes - - -- Warn for duplicate names and modules - (_, dup_tc_names) = removeDups cmp_fst tc_names - (_, dup_val_names) = removeDups cmp_fst val_names - cmp_fst (x,_) (y,_) = x `cmp` y - - (uniq_mods, dup_mods) = removeDups cmpPString exp_mods - (expmods_this, expmods_imps) = partition (== this_mod) uniq_mods - - -- Get names for "module This_Mod" export - (this_tcs, this_vals) - = if null expmods_this - then ([], []) - else getLocalsFromRnEnv rn_env - - -- Get names for exported imported modules - (mod_tcs, mod_vals, empty_mods) - = case mapAndUnzip3 get_mod_names expmods_imps of - (tcs, vals, emptys) -> (concat tcs, concat vals, catMaybes emptys) - - (unqual_tcs, unqual_vals) = partition (isRnTyConOrClass.snd) (bagToList unqual_imps) - - get_mod_names mod - = --pprTrace "get_mod_names" (ppAboves [ppPStr mod, interpp'SP PprDebug (map fst tcs), interpp'SP PprDebug (map fst vals)]) $ - (tcs, vals, empty_mod) - where - tcs = [(getName rn, nameImportFlag (getName rn)) - | (mod',rn) <- unqual_tcs, mod == mod'] - vals = [(getName rn, nameImportFlag (getName rn)) - | (mod',rn) <- unqual_vals, mod == mod', fun_looking rn] - empty_mod = if null tcs && null vals - then Just mod - else Nothing - - -- fun_looking: must avoid class ops and data constructors - -- and record fieldnames - fun_looking (RnName _) = True - fun_looking (WiredInId i) = not (isDataCon i) - fun_looking _ = False - - -- Build finite map of exported names to export flag - tc_map0 = addListToUFM_C lub_expflag emptyUFM (map pair_fst tc_names) - tc_map1 = addListToUFM_C lub_expflag tc_map0 (map pair_fst mod_tcs) - tc_map = addListToUFM_C lub_expflag tc_map1 (map (pair_fst.exp_all) this_tcs) - - val_map0 = addListToUFM_C lub_expflag emptyUFM (map pair_fst val_names) - val_map1 = addListToUFM_C lub_expflag val_map0 (map pair_fst mod_vals) - val_map = addListToUFM_C lub_expflag val_map1 (map (pair_fst.exp_all) this_vals) - - pair_fst pr@(n,_) = (n,pr) - exp_all rn = (getName rn, ExportAll) - lub_expflag (n, flag1) (_, flag2) = (n, lubExportFlag flag1 flag2) - - -- Check for exporting of duplicate local names - tc_locals = [(getLocalName n, n) | (n,_) <- eltsUFM tc_map] - val_locals = [(getLocalName n, n) | (n,_) <- eltsUFM val_map] - (_, dup_tc_locals) = removeDups cmp_local tc_locals - (_, dup_val_locals) = removeDups cmp_local val_locals - cmp_local (x,_) (y,_) = x `cmpPString` y - - -- Build export flag function - final_exp_map = plusUFM tc_map val_map - exp_fn n = case lookupUFM final_exp_map n of - Nothing -> NotExported - Just (_,flag) -> flag - in - getSrcLocRn `thenRn` \ src_loc -> - mapRn (addWarnRn . dupNameExportWarn src_loc) dup_tc_names `thenRn_` - mapRn (addWarnRn . dupNameExportWarn src_loc) dup_val_names `thenRn_` - mapRn (addWarnRn . dupModExportWarn src_loc) dup_mods `thenRn_` - mapRn (addWarnRn . emptyModExportWarn src_loc) empty_mods `thenRn_` - mapRn (addErrRn . dupLocalsExportErr src_loc) dup_tc_locals `thenRn_` - mapRn (addErrRn . dupLocalsExportErr src_loc) dup_val_locals `thenRn_` - returnRn (exp_fn, (mod_vals, mod_tcs)) - ------------------------------------- --- rename an "IE" in the export list - -rnIE :: [Module] -- this module and all the (directly?) imported modules - -> RdrNameIE - -> RnM s ( - Maybe Module, -- Just m => a "module X" export item - (Bag (Name, ExportFlag), -- Exported tycons/classes - Bag (Name, ExportFlag))) -- Exported values - -rnIE mods (IEVar name) - = lookupValue name `thenRn` \ rn -> - checkIEVar rn `thenRn` \ exps -> - returnRn (Nothing, exps) - where - checkIEVar (RnName n) = returnRn (emptyBag, unitBag (n,ExportAll)) - checkIEVar (WiredInId i) = returnRn (emptyBag, unitBag (getName i, ExportAll)) - checkIEVar rn@(RnClassOp _ _) = getSrcLocRn `thenRn` \ src_loc -> - failButContinueRn (emptyBag, emptyBag) (classOpExportErr rn src_loc) - checkIEVar rn@(RnField _ _) = getSrcLocRn `thenRn` \ src_loc -> - failButContinueRn (emptyBag, emptyBag) (fieldExportErr rn src_loc) - checkIEVar rn = --pprTrace "rnIE:IEVar:panic? ToDo?:" (ppr PprDebug rn) $ - returnRn (emptyBag, emptyBag) - -rnIE mods (IEThingAbs name) - = lookupTyConOrClass name `thenRn` \ rn -> - checkIEAbs rn `thenRn` \ exps -> - returnRn (Nothing, exps) - where - checkIEAbs (RnSyn n) = returnRn (unitBag (n,ExportAbs), emptyBag) - checkIEAbs (RnData n _ _) = returnRn (unitBag (n,ExportAbs), emptyBag) - checkIEAbs (RnClass n _) = returnRn (unitBag (n,ExportAbs), emptyBag) - checkIEAbs (WiredInTyCon t) = returnRn (unitBag (getName t,ExportAbs), emptyBag) - checkIEAbs rn = --pprTrace "rnIE:IEAbs:panic? ToDo?:" (ppr PprDebug rn) $ - returnRn (emptyBag, 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 (unitBag (exp_all n), - listToBag (map exp_all cons) `unionBags` listToBag (map exp_all fields)) - - checkIEAll (WiredInTyCon t) - = returnRn (unitBag (exp_all (getName t)), listToBag (map exp_all cons)) - where - cons = map getName (tyConDataCons t) - - checkIEAll (RnClass n ops) - = returnRn (unitBag (exp_all n), listToBag (map exp_all ops)) - checkIEAll rn@(RnSyn n) - = getSrcLocRn `thenRn` \ src_loc -> - warnAndContinueRn (unitBag (n, ExportAbs), emptyBag) - (synAllExportErr False{-warning-} rn src_loc) - - checkIEAll rn = --pprTrace "rnIE:IEAll:panic? ToDo?:" (ppr PprDebug rn) $ - returnRn (emptyBag, 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 (unitBag (exp_all n), listToBag (map exp_all cons) - `unionBags` - listToBag (map exp_all fields)) - | otherwise - = rnWithErr "constructors (and fields)" rn (cons++fields) rns - checkIEWith rn@(RnClass n ops) rns - | same_names ops rns - = returnRn (unitBag (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, emptyBag) (synAllExportErr True{-error-} rn src_loc) - checkIEWith (WiredInTyCon _) rns = panic "RnSource.rnIE:checkIEWith:WiredInTyCon:ToDo (boring)" - checkIEWith rn rns - = pprTrace "rnIE:IEWith:panic? ToDo?:" (ppr PprDebug rn) $ - returnRn (emptyBag, 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, emptyBag) (withExportErr str rn has rns src_loc) - -rnIE mods (IEModuleContents mod) - | isIn "rnIE:IEModule" mod mods - = returnRn (Just mod, (emptyBag, emptyBag)) - | otherwise - = getSrcLocRn `thenRn` \ src_loc -> - failButContinueRn (Nothing, (emptyBag, emptyBag)) (badModExportErr mod src_loc) - - -checkImportAll rn - = case nameImportFlag (getName rn) of - ExportAll -> returnRn () - exp -> getSrcLocRn `thenRn` \ src_loc -> - addErrRn (importAllErr rn src_loc) +rnDecl :: RdrNameHsDecl -> RnMS s RenamedHsDecl + +rnDecl (ValD binds) = rnTopBinds binds `thenRn` \ new_binds -> + returnRn (ValD new_binds) + + +rnDecl (SigD (IfaceSig name ty id_infos loc)) + = pushSrcLocRn loc $ + lookupBndrRn name `thenRn` \ name' -> + rnHsType ty `thenRn` \ ty' -> + + -- Get the pragma info (if any). + getModeRn `thenRn` \ (InterfaceMode _ print_unqual) -> + setModeRn (InterfaceMode Optional print_unqual) $ + -- 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)) \end{code} %********************************************************* @@ -348,126 +105,28 @@ it again to rename the tyvars! However, we can also do some scoping checks at the same time. \begin{code} -rnTyDecl :: RdrNameTyDecl -> RnM_Fixes s RenamedTyDecl - -rnTyDecl (TyData context tycon tyvars condecls derivings pragmas src_loc) +rnDecl (TyD (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 src_loc context `thenRn` \ context' -> - rnConDecls tv_env condecls `thenRn` \ condecls' -> - rn_derivs tycon' src_loc derivings `thenRn` \ derivings' -> + lookupBndrRn tycon `thenRn` \ tycon' -> + bindTyVarsRn data_doc tyvars $ \ tyvars' -> + rnContext context `thenRn` \ context' -> + checkDupOrQualNames data_doc con_names `thenRn_` + mapRn rnConDecl condecls `thenRn` \ condecls' -> + rnDerivs derivings `thenRn` \ derivings' -> ASSERT(isNoDataPragmas pragmas) - returnRn (TyData context' tycon' tyvars' condecls' derivings' noDataPragmas src_loc) - -rnTyDecl (TyNew context tycon tyvars condecl derivings pragmas src_loc) - = pushSrcLocRn src_loc $ - lookupTyCon tycon `thenRn` \ tycon' -> - mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') -> - rnContext tv_env src_loc 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) - -rnTyDecl (TySynonym name tyvars ty 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 - -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_name locn) - `thenRn_` - returnRn clas_name - where - not_elem = isn'tIn "rn_deriv" -\end{code} - -@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. - -\begin{code} -rnConDecls :: TyVarNamesEnv - -> [RdrNameConDecl] - -> RnM_Fixes s [RenamedConDecl] - -rnConDecls tv_env con_decls - = mapRn rn_decl con_decls + returnRn (TyD (TyData new_or_data context' tycon' tyvars' condecls' derivings' noDataPragmas src_loc)) 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) -\end{code} - -%********************************************************* -%* * -\subsection{SPECIALIZE data pragmas} -%* * -%********************************************************* - -\begin{code} -rnSpecDataSig :: RdrNameSpecDataSig - -> RnM_Fixes s RenamedSpecDataSig + data_doc = text "the data type declaration for" <+> ppr tycon + con_names = map conDeclName condecls -rnSpecDataSig (SpecDataSig tycon ty src_loc) +rnDecl (TyD (TySynonym name tyvars ty src_loc)) = pushSrcLocRn src_loc $ - let - tyvars = extractMonoTyNames is_tyvar_name ty - in - mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env,_) -> - lookupTyCon tycon `thenRn` \ tycon' -> - rnMonoType tv_env ty `thenRn` \ ty' -> - returnRn (SpecDataSig tycon' ty' src_loc) - -is_tyvar_name n = isLexVarId (getLocalName n) + lookupBndrRn name `thenRn` \ name' -> + bindTyVarsRn syn_doc tyvars $ \ tyvars' -> + rnHsType ty `thenRn` \ ty' -> + returnRn (TyD (TySynonym name' tyvars' ty' src_loc)) + where + syn_doc = text "the declaration for type synonym" <+> ppr name \end{code} %********************************************************* @@ -481,41 +140,86 @@ 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 (ClD (ClassDecl context cname tyvars sigs mbinds pragmas tname dname src_loc)) = pushSrcLocRn src_loc $ - mkTyVarNamesEnv src_loc [tyvar] `thenRn` \ (tv_env, [tyvar']) -> - rnContext tv_env src_loc context `thenRn` \ context' -> - lookupClass cname `thenRn` \ cname' -> - mapRn (rn_op cname' tyvar' tv_env) sigs `thenRn` \ sigs' -> - rnMethodBinds cname' mbinds `thenRn` \ mbinds' -> + + lookupBndrRn cname `thenRn` \ cname' -> + lookupBndrRn tname `thenRn` \ tname' -> + lookupBndrRn dname `thenRn` \ dname' -> + + bindTyVarsRn cls_doc tyvars ( \ tyvars' -> + rnContext context `thenRn` \ context' -> + + -- Check the signatures + let + clas_tyvar_names = map getTyVarName tyvars' + in + checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_` + mapRn (rn_op cname' clas_tyvar_names) sigs `thenRn` \ sigs' -> + returnRn (tyvars', context', sigs') + ) `thenRn` \ (tyvars', context', sigs') -> + + -- Check the methods + checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_` + rnMethodBinds mbinds `thenRn` \ mbinds' -> + + -- 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. + ASSERT(isNoClassPragmas pragmas) - returnRn (ClassDecl context' cname' tyvar' sigs' mbinds' NoClassPragmas src_loc) + returnRn (ClD (ClassDecl context' cname' tyvars' sigs' mbinds' NoClassPragmas tname' dname' src_loc)) where - rn_op clas clas_tyvar tv_env sig@(ClassOpSig op ty pragmas locn) + 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 $ - lookupClassOp clas op `thenRn` \ op_name -> - rnPolyType tv_env ty `thenRn` \ new_ty -> + lookupBndrRn op `thenRn` \ op_name -> + rnHsSigType (quotes (ppr op)) ty `thenRn` \ new_ty -> + + -- Make the default-method name + let + dm_occ = prefixOccName SLIT("$m") (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 (ifaceFlavour clas) `thenRn` \ dm_name -> + addOccurrenceName dm_name `thenRn_` + returnRn (Just dm_name) + + other -> returnRn Nothing + ) `thenRn` \ maybe_dm_name -> + + -- Check that each class tyvar appears in op_ty let - (HsForAllTy tvs ctxt op_ty) = new_ty - ctxt_tvs = extractCtxtTyNames ctxt - op_tvs = extractMonoTyNames is_tyvar_name op_ty + (ctxt, op_ty) = case new_ty of + HsForAllTy tvs ctxt op_ty -> (ctxt, op_ty) + other -> ([], new_ty) + ctxt_fvs = extractHsCtxtTyNames ctxt -- Includes tycons/classes but we + op_ty_fvs = extractHsTyNames op_ty -- don't care about that + + check_in_op_ty clas_tyvar = checkRn (clas_tyvar `elemNameSet` op_ty_fvs) + (classTyVarNotInOpTyErr clas_tyvar sig) in - -- check that class tyvar appears in op_ty - ( if isIn "rn_op" clas_tyvar op_tvs - then returnRn () - else addErrRn (classTyVarNotInOpTyErr clas_tyvar sig locn) - ) `thenRn_` - - -- check that class tyvar *doesn't* appear in the sig's context - ( if isIn "rn_op(2)" clas_tyvar ctxt_tvs - then addErrRn (classTyVarInOpCtxtErr clas_tyvar sig locn) - else returnRn () - ) `thenRn_` - - ASSERT(isNoClassOpPragmas pragmas) - returnRn (ClassOpSig op_name new_ty noClassOpPragmas locn) + mapRn check_in_op_ty clas_tyvars `thenRn_` + + returnRn (ClassOpSig op_name maybe_dm_name new_ty locn) \end{code} @@ -525,138 +229,187 @@ rnClassDecl (ClassDecl context cname tyvar sigs mbinds pragmas src_loc) %* * %********************************************************* - -@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. - \begin{code} -rnInstDecl :: RdrNameInstDecl -> RnM_Fixes s RenamedInstDecl - -rnInstDecl (InstDecl cname ty mbinds from_here modname uprags pragmas src_loc) +rnDecl (InstD (InstDecl inst_ty mbinds uprags maybe_dfun src_loc)) = pushSrcLocRn src_loc $ - lookupClass cname `thenRn` \ cname' -> + rnHsSigType (text "an instance decl") inst_ty `thenRn` \ inst_ty' -> - rnPolyType [] ty `thenRn` \ ty' -> - -- [] tv_env ensures that tyvars will be foralled - rnMethodBinds cname' mbinds `thenRn` \ mbinds' -> - mapRn (rn_uprag cname') uprags `thenRn` \ new_uprags -> + -- Rename the bindings + -- NB meth_names can be qualified! + checkDupNames meth_doc meth_names `thenRn_` + rnMethodBinds mbinds `thenRn` \ mbinds' -> + mapRn rn_uprag uprags `thenRn` \ new_uprags -> + + let + -- We use the class name and the name of the first + -- type constructor the class is applied to. + (cl_nm, tycon_nm) = mkDictPrefix inst_ty' + + mkDictPrefix (MonoDictTy cl tys) = + case tys of + [] -> (c_nm, nilOccName ) + (ty:_) -> (c_nm, getInstHeadTy ty) + where + c_nm = nameOccName (getName cl) + + mkDictPrefix (HsPreForAllTy _ ty) = mkDictPrefix ty + mkDictPrefix (HsForAllTy _ _ ty) = mkDictPrefix ty -- can this + mkDictPrefix _ = (nilOccName, nilOccName) + + getInstHeadTy t + = case t of + MonoTyVar tv -> nameOccName (getName tv) + MonoTyApp t _ -> getInstHeadTy t + _ -> nilOccName + -- I cannot see how the rest of HsType constructors + -- can occur, but this isn't really a failure condition, + -- so we return silently. + + nilOccName = (VarOcc _NIL_) -- ToDo: add OccName constructor fun for this. + in + newDfunName cl_nm tycon_nm 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 - ASSERT(isNoInstancePragmas pragmas) - returnRn (InstDecl cname' ty' mbinds' - from_here modname new_uprags noInstancePragmas src_loc) + -- 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)) where - rn_uprag class_name (SpecSig op ty using locn) + meth_doc = text "the bindings in an instance declaration" + meth_names = bagToList (collectMonoBinders mbinds) + + rn_uprag (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 -> + lookupBndrRn op `thenRn` \ op_name -> + rnHsSigType (quotes (ppr op)) 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) + rn_uprag (InlineSig op locn) = pushSrcLocRn locn $ - lookupClassOp class_name op `thenRn` \ op_name -> + lookupBndrRn op `thenRn` \ op_name -> returnRn (InlineSig op_name locn) - rn_uprag class_name (DeforestSig op locn) - = pushSrcLocRn locn $ - lookupClassOp class_name op `thenRn` \ op_name -> - returnRn (DeforestSig op_name locn) - - rn_uprag class_name (MagicUnfoldingSig op str locn) + rn_uprag (MagicUnfoldingSig op str locn) = pushSrcLocRn locn $ - lookupClassOp class_name op `thenRn` \ op_name -> + lookupBndrRn 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) + rn_using Nothing = returnRn Nothing + rn_using (Just v) = lookupOccRn v `thenRn` \ new_v -> + returnRn (Just new_v) \end{code} %********************************************************* %* * -\subsection{@SPECIALIZE instance@ user-pragmas} +\subsection{Default declarations} %* * %********************************************************* \begin{code} -rnSpecInstSig :: RdrNameSpecInstSig - -> RnM_Fixes s RenamedSpecInstSig - -rnSpecInstSig (SpecInstSig clas ty src_loc) +rnDecl (DefD (DefaultDecl tys 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) + mapRn rnHsType tys `thenRn` \ tys' -> + lookupImplicitOccRn numClass_RDR `thenRn_` + returnRn (DefD (DefaultDecl tys' src_loc)) \end{code} %********************************************************* %* * -\subsection{Default declarations} +\subsection{Support code for type/data declarations} %* * %********************************************************* -@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] +rnDerivs :: Maybe [RdrName] -> RnMS s (Maybe [Name]) -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] -\end{code} +rnDerivs Nothing -- derivs not specified + = lookupImplicitOccRn evalClass_RDR `thenRn_` + returnRn Nothing -%************************************************************************* -%* * -\subsection{Fixity declarations} -%* * -%************************************************************************* +rnDerivs (Just ds) + = lookupImplicitOccRn evalClass_RDR `thenRn_` + mapRn rn_deriv ds `thenRn` \ derivs -> + returnRn (Just derivs) + where + rn_deriv clas + = lookupOccRn clas `thenRn` \ clas_name -> + + -- 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 + + Just occs -> mapRn lookupImplicitOccRn occs `thenRn_` + returnRn clas_name +\end{code} \begin{code} -rnFixes :: [RdrNameFixityDecl] -> RnM s [RenamedFixityDecl] - -rnFixes fixities - = getSrcLocRn `thenRn` \ src_loc -> - let - (_, dup_fixes) = removeDups cmp_fix fixities - cmp_fix fix1 fix2 = fixDeclName fix1 `cmp` fixDeclName 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 -- || opt_CompilingGhcInternals - -- the opt_CompilingGhcInternals thing is a *HACK* to get (:)'s - -- fixity decl to go through. It has a builtin name, which - -- doesn't respond to isLocallyDefined... sigh. - -> returnRn (Just (mk_fixity res i)) - _ -> failButContinueRn Nothing (undefinedFixityDeclErr src_loc fix) - in - mapRn (addErrRn . dupFixityDeclErr src_loc) dup_fixes `thenRn_` - mapRn rn_fixity fixities `thenRn` \ fixes_maybe -> - returnRn (catMaybes fixes_maybe) +conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc) +conDeclName (ConDecl n _ _ l) = (n,l) + +rnConDecl :: RdrNameConDecl -> RnMS s RenamedConDecl +rnConDecl (ConDecl name cxt details locn) + = pushSrcLocRn locn $ + checkConName name `thenRn_` + lookupBndrRn name `thenRn` \ new_name -> + rnConDetails name locn details `thenRn` \ new_details -> + rnContext cxt `thenRn` \ new_context -> + returnRn (ConDecl new_name new_context new_details locn) + +rnConDetails con locn (VanillaCon tys) + = mapRn rnBangTy tys `thenRn` \ new_tys -> + returnRn (VanillaCon new_tys) + +rnConDetails con locn (InfixCon ty1 ty2) + = rnBangTy ty1 `thenRn` \ new_ty1 -> + rnBangTy ty2 `thenRn` \ new_ty2 -> + returnRn (InfixCon new_ty1 new_ty2) + +rnConDetails con locn (NewCon ty) + = rnHsType ty `thenRn` \ new_ty -> + returnRn (NewCon new_ty) + +rnConDetails con locn (RecCon fields) + = checkDupOrQualNames fld_doc field_names `thenRn_` + mapRn rnField fields `thenRn` \ new_fields -> + returnRn (RecCon new_fields) + where + fld_doc = text "the fields of constructor" <> ppr con + field_names = [(fld, locn) | (flds, _) <- fields, fld <- flds] + +rnField (names, ty) + = mapRn lookupBndrRn names `thenRn` \ new_names -> + rnBangTy ty `thenRn` \ new_ty -> + returnRn (new_names, new_ty) + +rnBangTy (Banged ty) + = rnHsType ty `thenRn` \ new_ty -> + returnRn (Banged new_ty) + +rnBangTy (Unbanged ty) + = rnHsType ty `thenRn` \ new_ty -> + returnRn (Unbanged new_ty) + +-- 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 (isLexCon (occNameString (rdrNameOcc name))) + (badDataCon name) \end{code} + %********************************************************* %* * \subsection{Support code to rename types} @@ -664,180 +417,337 @@ rnFixes fixities %********************************************************* \begin{code} -rnPolyType :: TyVarNamesEnv - -> RdrNamePolyType - -> RnM_Fixes s RenamedPolyType +rnHsSigType :: SDoc -> RdrNameHsType -> RnMS s RenamedHsType + -- rnHsSigType is used for source-language type signatures, + -- which use *implicit* universal quantification. + +-- Given the signature C => T we universally quantify over FV(T) \ {in-scope-tyvars} +-- +-- We insist that the universally quantified type vars is a superset of FV(C) +-- It follows that FV(T) is a superset of FV(C), so that the context constrains +-- no type variables that don't appear free in the tau-type part. + +rnHsSigType doc_str full_ty@(HsPreForAllTy ctxt ty) -- From source code (no kinds on tyvars) + = getLocalNameEnv `thenRn` \ name_env -> + let + mentioned_tyvars = extractHsTyVars ty + forall_tyvars = filter (not . in_scope) mentioned_tyvars + in_scope tv = maybeToBool (lookupFM name_env tv) -rnPolyType tv_env (HsForAllTy tvs ctxt ty) - = rn_poly_help tv_env tvs ctxt ty + constrained_tyvars = extractHsCtxtTyVars ctxt + constrained_and_in_scope = filter in_scope constrained_tyvars + constrained_and_not_mentioned = filter (not . (`elem` mentioned_tyvars)) constrained_tyvars -rnPolyType tv_env (HsPreForAllTy ctxt ty) - = rn_poly_help tv_env forall_tyvars ctxt ty + -- Zap the context if there's a problem, to avoid duplicate error message. + ctxt' | null constrained_and_in_scope && null constrained_and_not_mentioned = ctxt + | otherwise = [] + in + checkRn (null constrained_and_in_scope) + (ctxtErr1 sig_doc constrained_and_in_scope) `thenRn_` + checkRn (null constrained_and_not_mentioned) + (ctxtErr2 sig_doc constrained_and_not_mentioned ty) `thenRn_` + + (bindTyVarsRn sig_doc (map UserTyVar forall_tyvars) $ \ new_tyvars -> + rnContext ctxt' `thenRn` \ new_ctxt -> + rnHsType ty `thenRn` \ new_ty -> + returnRn (HsForAllTy new_tyvars new_ctxt new_ty) + ) 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) -> + sig_doc = text "the type signature for" <+> doc_str + + +rnHsSigType doc_str other_ty = rnHsType other_ty + +rnHsType :: RdrNameHsType -> RnMS s RenamedHsType +rnHsType (HsForAllTy tvs ctxt ty) -- From an interface file (tyvars may be kinded) + = rn_poly_help tvs ctxt ty + +rnHsType full_ty@(HsPreForAllTy ctxt ty) -- A (context => ty) embedded in a type. + -- Universally quantify over tyvars in context + = getLocalNameEnv `thenRn` \ name_env -> let - tv_env2 = catTyVarNamesEnvs tv_env1 tv_env + forall_tyvars = extractHsCtxtTyVars ctxt in - rnContext tv_env2 src_loc ctxt `thenRn` \ new_ctxt -> - rnMonoType tv_env2 ty `thenRn` \ new_ty -> - returnRn (HsForAllTy new_tyvars new_ctxt new_ty) -\end{code} - -\begin{code} -rnMonoType :: TyVarNamesEnv - -> RdrNameMonoType - -> RnM_Fixes s RenamedMonoType + rn_poly_help (map UserTyVar forall_tyvars) ctxt ty -rnMonoType tv_env (MonoTyVar tyvar) - = lookupTyVarName tv_env tyvar `thenRn` \ tyvar' -> +rnHsType (MonoTyVar tyvar) + = lookupOccRn tyvar `thenRn` \ tyvar' -> returnRn (MonoTyVar tyvar') -rnMonoType tv_env (MonoListTy ty) - = rnMonoType tv_env ty `thenRn` \ ty' -> - returnRn (MonoListTy ty') +rnHsType (MonoFunTy ty1 ty2) + = andRn MonoFunTy (rnHsType ty1) (rnHsType ty2) -rnMonoType tv_env (MonoFunTy ty1 ty2) - = andRn MonoFunTy (rnMonoType tv_env ty1) - (rnMonoType tv_env ty2) +rnHsType (MonoListTy _ ty) + = lookupImplicitOccRn listType_RDR `thenRn` \ tycon_name -> + rnHsType ty `thenRn` \ ty' -> + returnRn (MonoListTy tycon_name ty') -rnMonoType tv_env (MonoTupleTy tys) - = mapRn (rnMonoType tv_env) tys `thenRn` \ tys' -> - returnRn (MonoTupleTy tys') +rnHsType (MonoTupleTy _ tys) + = lookupImplicitOccRn (tupleType_RDR (length tys)) `thenRn` \ tycon_name -> + mapRn rnHsType tys `thenRn` \ tys' -> + returnRn (MonoTupleTy tycon_name tys') -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') +rnHsType (MonoTyApp ty1 ty2) + = rnHsType ty1 `thenRn` \ ty1' -> + rnHsType ty2 `thenRn` \ ty2' -> + returnRn (MonoTyApp ty1' ty2') + +rnHsType (MonoDictTy clas tys) + = lookupOccRn clas `thenRn` \ clas' -> + mapRn rnHsType tys `thenRn` \ tys' -> + returnRn (MonoDictTy clas' tys') + +rn_poly_help :: [HsTyVar RdrName] -- Universally quantified tyvars + -> RdrNameContext + -> RdrNameHsType + -> RnMS s RenamedHsType +rn_poly_help tyvars ctxt ty + = bindTyVarsRn sig_doc tyvars $ \ new_tyvars -> + rnContext ctxt `thenRn` \ new_ctxt -> + rnHsType ty `thenRn` \ new_ty -> + returnRn (HsForAllTy new_tyvars new_ctxt new_ty) + where + sig_doc = text "a nested for-all type" \end{code} + \begin{code} -rnContext :: TyVarNamesEnv -> SrcLoc -> RdrNameContext -> RnM_Fixes s RenamedContext +rnContext :: RdrNameContext -> RnMS s RenamedContext -rnContext tv_env locn ctxt +rnContext ctxt = mapRn rn_ctxt ctxt `thenRn` \ result -> let (_, dup_asserts) = removeDups cmp_assert result + (alls, theta) = partition (\(c,_) -> c == allClass_NAME) result in - -- If this isn't an error, then it ought to be: - mapRn (addWarnRn . dupClassAssertWarn result locn) dup_asserts `thenRn_` - returnRn result + + -- Check for duplicate assertions + -- If this isn't an error, then it ought to be: + mapRn (addWarnRn . dupClassAssertWarn theta) dup_asserts `thenRn_` + + -- Check for All constraining a non-type-variable + mapRn check_All alls `thenRn_` + + -- Done. Return a theta omitting all the "All" constraints. + -- They have done done their work by ensuring that we universally + -- quantify over their tyvar. + returnRn theta where - rn_ctxt (clas, tyvar) - = lookupClass clas `thenRn` \ clas_name -> - lookupTyVarName tv_env tyvar `thenRn` \ tyvar_name -> - returnRn (clas_name, tyvar_name) + rn_ctxt (clas, tys) + = -- Mini hack here. If the class is our pseudo-class "All", + -- then we don't want to record it as an occurrence, otherwise + -- we try to slurp it in later and it doesn't really exist at all. + -- Easiest thing is simply not to put it in the occurrence set. + lookupBndrRn clas `thenRn` \ clas_name -> + (if clas_name /= allClass_NAME then + addOccurrenceName clas_name + else + returnRn clas_name + ) `thenRn_` + mapRn rnHsType tys `thenRn` \ tys' -> + returnRn (clas_name, tys') + + + cmp_assert (c1,tys1) (c2,tys2) + = (c1 `compare` c2) `thenCmp` (cmpHsTypes compare tys1 tys2) + + check_All (c, [MonoTyVar _]) = returnRn () -- OK! + check_All assertion = addErrRn (wierdAllErr assertion) +\end{code} + + +%********************************************************* +%* * +\subsection{IdInfo} +%* * +%********************************************************* + +\begin{code} +rnIdInfo (HsStrictness strict) + = rnStrict strict `thenRn` \ strict' -> + returnRn (HsStrictness strict') + +rnIdInfo (HsUnfold inline expr) = rnCoreExpr expr `thenRn` \ expr' -> + returnRn (HsUnfold inline expr') +rnIdInfo (HsArity arity) = returnRn (HsArity arity) +rnIdInfo (HsUpdate update) = returnRn (HsUpdate update) +rnIdInfo (HsFBType fb) = returnRn (HsFBType fb) +rnIdInfo (HsArgUsage au) = returnRn (HsArgUsage au) + +rnStrict (HsStrictnessInfo demands (Just (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 (HsStrictnessInfo demands (Just (worker',[]))) + +-- Boring, but necessary for the type checker. +rnStrict (HsStrictnessInfo demands Nothing) = returnRn (HsStrictnessInfo demands Nothing) +rnStrict HsBottom = returnRn HsBottom +\end{code} + +UfCore expressions. - cmp_assert (c1,tv1) (c2,tv2) - = (c1 `cmp` c2) `thenCmp` (tv1 `cmp` tv2) +\begin{code} +rnCoreExpr (UfVar v) + = lookupOccRn v `thenRn` \ v' -> + returnRn (UfVar v') + +rnCoreExpr (UfLit lit) = returnRn (UfLit lit) + +rnCoreExpr (UfCon con args) + = lookupOccRn con `thenRn` \ con' -> + mapRn rnCoreArg args `thenRn` \ args' -> + returnRn (UfCon con' args') + +rnCoreExpr (UfPrim prim args) + = rnCorePrim prim `thenRn` \ prim' -> + mapRn rnCoreArg args `thenRn` \ args' -> + returnRn (UfPrim prim' args') + +rnCoreExpr (UfApp fun arg) + = rnCoreExpr fun `thenRn` \ fun' -> + rnCoreArg arg `thenRn` \ arg' -> + returnRn (UfApp fun' arg') + +rnCoreExpr (UfCase scrut alts) + = rnCoreExpr scrut `thenRn` \ scrut' -> + rnCoreAlts alts `thenRn` \ alts' -> + returnRn (UfCase scrut' alts') + +rnCoreExpr (UfSCC cc expr) + = rnCoreExpr expr `thenRn` \ expr' -> + returnRn (UfSCC cc expr') + +rnCoreExpr(UfCoerce coercion ty body) + = rnCoercion coercion `thenRn` \ coercion' -> + rnHsType ty `thenRn` \ ty' -> + rnCoreExpr body `thenRn` \ body' -> + returnRn (UfCoerce coercion' ty' body') + +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 + (bndrs, rhss) = unzip pairs \end{code} +\begin{code} +rnCoreBndr (UfValBinder name ty) thing_inside + = rnHsType ty `thenRn` \ ty' -> + bindLocalsRn "unfolding value" [name] $ \ [name'] -> + thing_inside (UfValBinder name' ty') + +rnCoreBndr (UfTyBinder name kind) thing_inside + = bindLocalsRn "unfolding tyvar" [name] $ \ [name'] -> + thing_inside (UfTyBinder name' kind) + +rnCoreBndrs bndrs thing_inside -- Expect them all to be ValBinders + = mapRn rnHsType tys `thenRn` \ tys' -> + bindLocalsRn "unfolding value" names $ \ names' -> + thing_inside (zipWith UfValBinder names' tys') + where + names = map (\ (UfValBinder name _) -> name) bndrs + tys = map (\ (UfValBinder _ ty) -> ty) bndrs + +rnCoreBndrNamess names thing_inside + = bindLocalsRn "unfolding value" names $ \ names' -> + thing_inside names' +\end{code} \begin{code} -dupNameExportWarn locn names@((n,_):_) - = addShortWarnLocLine 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 its class"] - -fieldExportErr op locn - = addShortErrLocLine locn $ \ sty -> - ppBesides [ppStr "field name `", ppr sty op, ppStr "' can only be exported with its data type"] - -synAllExportErr is_error syn locn - = (if is_error then addShortErrLocLine else addShortWarnLocLine) 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: module", ppPStr mod] - -emptyModExportWarn locn mod - = addShortWarnLocLine locn $ \ sty -> - ppCat [ppStr "module", ppPStr mod, ppStr "has no unqualified imports to export"] - -dupModExportWarn locn mods@(mod:_) - = addShortWarnLocLine locn $ \ sty -> - ppCat [ppStr "module", ppPStr mod, ppStr "appears", ppInt (length mods), ppStr "times in export list"] - -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) +rnCoreArg (UfVarArg v) = lookupOccRn v `thenRn` \ v' -> returnRn (UfVarArg v') +rnCoreArg (UfTyArg ty) = rnHsType ty `thenRn` \ ty' -> returnRn (UfTyArg ty') +rnCoreArg (UfLitArg lit) = returnRn (UfLitArg lit) + +rnCoreAlts (UfAlgAlts alts deflt) + = mapRn rn_alt alts `thenRn` \ alts' -> + rnCoreDefault deflt `thenRn` \ deflt' -> + returnRn (UfAlgAlts alts' deflt') where - item1 - = addShortErrLocLine locn1 (\ sty -> - ppStr "multiple default declarations") sty - - dup_item (DefaultDecl _ locn) - = addShortErrLocLine locn (\ sty -> - ppStr "here was another default declaration") sty - -undefinedFixityDeclErr locn decl - = addErrLoc locn "fixity declaration for unknown operator" $ \ sty -> - ppr sty decl - -dupFixityDeclErr locn dups - = addErrLoc locn "multiple fixity declarations for same operator" $ \ sty -> - ppAboves (map (ppr sty) dups) - -classTyVarNotInOpTyErr clas_tyvar sig locn - = addShortErrLocLine locn $ \ sty -> - ppHang (ppBesides [ppStr "Class type variable `", ppr sty clas_tyvar, ppStr "' does not appear in method signature:"]) - 4 (ppr sty sig) - -classTyVarInOpCtxtErr clas_tyvar sig locn - = addShortErrLocLine locn $ \ sty -> - ppHang (ppBesides [ppStr "Class type variable `", ppr sty clas_tyvar, ppStr "' present in method's local overloading context:"]) - 4 (ppr sty sig) - -dupClassAssertWarn ctxt locn dups - = addShortWarnLocLine locn $ \ sty -> - ppHang (ppBesides [ppStr "Duplicate class assertion `", ppr sty dups, ppStr "' in context:"]) - 4 (ppr sty ctxt) + rn_alt (con, bndrs, rhs) = lookupOccRn con `thenRn` \ con' -> + bindLocalsRn "unfolding alt" bndrs $ \ bndrs' -> + rnCoreExpr rhs `thenRn` \ rhs' -> + returnRn (con', bndrs', rhs') + +rnCoreAlts (UfPrimAlts alts deflt) + = mapRn rn_alt alts `thenRn` \ alts' -> + rnCoreDefault deflt `thenRn` \ deflt' -> + returnRn (UfPrimAlts alts' deflt') + where + rn_alt (lit, rhs) = rnCoreExpr rhs `thenRn` \ rhs' -> + returnRn (lit, rhs') + +rnCoreDefault UfNoDefault = returnRn UfNoDefault +rnCoreDefault (UfBindDefault bndr rhs) = bindLocalsRn "unfolding default" [bndr] $ \ [bndr'] -> + rnCoreExpr rhs `thenRn` \ rhs' -> + returnRn (UfBindDefault bndr' rhs') + +rnCoercion (UfIn n) = lookupOccRn n `thenRn` \ n' -> returnRn (UfIn n') +rnCoercion (UfOut n) = lookupOccRn n `thenRn` \ n' -> returnRn (UfOut n') + +rnCorePrim (UfOtherOp op) + = lookupOccRn op `thenRn` \ op' -> + returnRn (UfOtherOp op') + +rnCorePrim (UfCCallOp str casm gc arg_tys res_ty) + = mapRn rnHsType arg_tys `thenRn` \ arg_tys' -> + rnHsType res_ty `thenRn` \ res_ty' -> + returnRn (UfCCallOp str casm gc arg_tys' res_ty') +\end{code} + +%********************************************************* +%* * +\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("Duplicated class assertion"), + quotes (pprClassAssertion assertion), + ptext SLIT("in the context:")], + nest 4 (pprContext ctxt)] + +badDataCon name + = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)] + +wierdAllErr assertion + = ptext SLIT("Mal-formed use of `All':") <+> pprClassAssertion assertion + +ctxtErr1 doc tyvars + = hsep [ptext SLIT("Context constrains in-scope type variable(s)"), + pprQuotedList tyvars] + $$ + nest 4 (ptext SLIT("in") <+> doc) + +ctxtErr2 doc tyvars ty + = (ptext SLIT("Context constrains type variable(s)") + <+> pprQuotedList tyvars) + $$ + nest 4 (vcat [ptext SLIT("that do not appear in") <+> quotes (ppr ty), + ptext SLIT("in") <+> doc]) \end{code}