\begin{code}
#include "HsVersions.h"
-module RnSource ( rnSource, rnTyDecl, rnClassDecl, rnInstDecl, rnPolyType ) where
+module RnSource ( rnDecl, rnHsType, rnHsSigType ) where
+IMPORT_1_3(List(partition))
IMP_Ubiq()
+
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201
IMPORT_DELOOPER(RnLoop) -- *check* the RnPass/RnExpr/RnBinds loop-breaking
-IMPORT_1_3(List(partition))
+#else
+import {-# SOURCE #-} RnExpr
+#endif
import HsSyn
+import HsDecls ( HsIdInfo(..) )
import HsPragmas
+import HsTypes ( getTyVarName )
import RdrHsSyn
import RnHsSyn
-import RnMonad
+import HsCore
+import CmdLineOpts ( opt_IgnoreIfacePragmas )
+
import RnBinds ( rnTopBinds, rnMethodBinds )
-import RnUtils ( getLocalsFromRnEnv, lookupGlobalRnEnv, lubExportFlag )
+import RnEnv ( bindTyVarsRn, lookupBndrRn, lookupOccRn, lookupImplicitOccRn, bindLocalsRn,
+ newSysName, newDfunName, checkDupOrQualNames, checkDupNames,
+ listType_RDR, tupleType_RDR )
+import RnMonad
-import Bag ( emptyBag, unitBag, consBag, unionManyBags, unionBags, listToBag, bagToList )
-import Class ( derivableClassKeys )
-import CmdLineOpts ( opt_CompilingGhcInternals )
+import Name ( Name, isLocallyDefined,
+ OccName(..), occNameString, prefixOccName,
+ ExportFlag(..),
+ Provenance,
+ SYN_IE(NameSet), unionNameSets, emptyNameSet, mkNameSet, unitNameSet,
+ elemNameSet
+ )
import ErrUtils ( addErrLoc, addShortErrLocLine, addShortWarnLocLine )
import FiniteMap ( emptyFM, lookupFM, addListToFM_C )
-import Id ( isDataCon, GenId{-instance NamedThing-} )
+import Id ( GenId{-instance NamedThing-} )
+import IdInfo ( IdInfo, StrictnessInfo(..), FBTypeInfo, DemandInfo, ArgUsageInfo )
+import SpecEnv ( SpecEnv )
+import Lex ( isLexCon )
+import CoreUnfold ( Unfolding(..), SimpleUnfolding )
+import MagicUFs ( MagicUnfoldingFun )
+import PrelInfo ( derivingOccurrences, evalClass_RDR, numClass_RDR, allClass_NAME )
import ListSetOps ( unionLists, minusList )
import Maybes ( maybeToBool, catMaybes )
-import Name ( isLocallyDefined, isLexVarId, getLocalName, ExportFlag(..),
- nameImportFlag, RdrName, pprNonSym, Name )
-import Outputable ( Outputable(..){-instances-} )
---import PprStyle -- ToDo:rm
+import Bag ( emptyBag, unitBag, consBag, unionManyBags, unionBags, listToBag, bagToList )
+import Outputable ( PprStyle(..), Outputable(..){-instances-} )
import Pretty
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 UniqFM ( UniqFM, lookupUFM )
+import Util
+IMPORT_1_3(List(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}
\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).
+ 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))
\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 (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 sty = text "the data type declaration for" <+> ppr sty 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 sty = text "the declaration for type synonym" <+> ppr sty name
\end{code}
%*********************************************************
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 tyvar sigs mbinds pragmas 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' ->
+ bindTyVarsRn cls_doc [tyvar] ( \ [tyvar'] ->
+ rnContext context `thenRn` \ context' ->
+ lookupBndrRn cname `thenRn` \ cname' ->
+
+ -- Check the signatures
+ checkDupOrQualNames sig_doc sig_names `thenRn_`
+ mapRn (rn_op cname' (getTyVarName tyvar')) sigs `thenRn` \ sigs' ->
+ returnRn (tyvar', context', cname', sigs')
+ ) `thenRn` \ (tyvar', context', cname', sigs') ->
+
+ -- Check the methods
+ checkDupOrQualNames meth_doc meth_names `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' tyvar' sigs' mbinds' NoClassPragmas src_loc))
where
- rn_op clas clas_tyvar tv_env sig@(ClassOpSig op ty pragmas locn)
+ cls_doc sty = text "the declaration for class" <+> ppr sty cname
+ sig_doc sty = text "the signatures for class" <+> ppr sty cname
+ meth_doc sty = text "the default-methods for class" <+> ppr sty cname
+
+ sig_names = [(op,locn) | ClassOpSig op _ _ locn <- sigs]
+ meth_names = bagToList (collectMonoBinders mbinds)
+
+ rn_op clas clas_tyvar sig@(ClassOpSig op _ ty locn)
= pushSrcLocRn locn $
- lookupClassOp clas op `thenRn` \ op_name ->
- rnPolyType tv_env ty `thenRn` \ new_ty ->
+ lookupBndrRn op `thenRn` \ op_name ->
+ rnHsSigType (\sty -> ppr sty op) ty `thenRn` \ new_ty ->
+
+ -- Call up interface info for default method, if such info exists
+ let
+ dm_occ = prefixOccName SLIT("$m") (rdrNameOcc op)
+ in
+ newSysName dm_occ Exported locn `thenRn` \ dm_name ->
+ setModeRn (InterfaceMode Optional) (
+ addOccurrenceName dm_name
+ ) `thenRn_`
+
+ -- Checks.....
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 = extractCtxtTyNames ctxt
+ op_ty_fvs = extractHsTyNames op_ty -- Includes tycons/classes but we
+ -- don't care about that
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)
+ -- Check that class tyvar appears in op_ty
+ checkRn (clas_tyvar `elemNameSet` op_ty_fvs)
+ (classTyVarNotInOpTyErr clas_tyvar sig)
+ `thenRn_`
+
+ returnRn (ClassOpSig op_name dm_name new_ty locn)
\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.
-
\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 (\sty -> 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 ->
- ASSERT(isNoInstancePragmas pragmas)
- returnRn (InstDecl cname' ty' mbinds'
- from_here modname new_uprags noInstancePragmas src_loc)
+ newDfunName 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))
where
- rn_uprag class_name (SpecSig op ty using locn)
+ meth_doc sty = 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 (\sty -> ppr sty 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)
+ rn_uprag (DeforestSig op locn)
= pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
+ lookupBndrRn 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 sty = text "the fields of constructor" <> ppr sty 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}
%*********************************************************
\begin{code}
-rnPolyType :: TyVarNamesEnv
- -> RdrNamePolyType
- -> RnM_Fixes s RenamedPolyType
+rnHsSigType :: (PprStyle -> Doc) -> 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)
+ = getNameEnv `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 = nub (concat (map (extractHsTyVars . snd) 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 sty = text "the type signature for" <+> doc_str sty
+
+
+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
+ = getNameEnv `thenRn` \ name_env ->
let
- tv_env2 = catTyVarNamesEnvs tv_env1 tv_env
+ forall_tyvars = foldr unionLists [] (map (extractHsTyVars . snd) 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 ty)
+ = lookupOccRn clas `thenRn` \ clas' ->
+ rnHsType ty `thenRn` \ ty' ->
+ returnRn (MonoDictTy clas' ty')
+
+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 sty = 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
+ non_tyvar_alls = [(c,t) | (c,t) <- alls, not (is_tyvar t)]
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 (addWarnRn . allOfNonTyVar) non_tyvar_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, ty)
+ = -- 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_`
+ rnHsType ty `thenRn` \ ty' ->
+ returnRn (clas_name, ty')
+
+ cmp_assert (c1,ty1) (c2,ty2)
+ = (c1 `cmp` c2) `thenCmp` (cmpHsType cmp ty1 ty2)
+
+ is_tyvar (MonoTyVar _) = True
+ is_tyvar other = False
+\end{code}
- cmp_assert (c1,tv1) (c2,tv2)
- = (c1 `cmp` c2) `thenCmp` (tv1 `cmp` tv2)
+
+%*********************************************************
+%* *
+\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)
+rnIdInfo (HsDeforest df) = returnRn (HsDeforest df)
+
+rnStrict (StrictnessInfo 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 (StrictnessInfo demands (Just (worker',[])))
+
+-- Boring, but necessary for the type checker.
+rnStrict (StrictnessInfo demands Nothing) = returnRn (StrictnessInfo demands Nothing)
+rnStrict BottomGuaranteed = returnRn BottomGuaranteed
+rnStrict NoStrictnessInfo = returnRn NoStrictnessInfo
+\end{code}
+
+UfCore expressions.
+
+\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)
+
+rnCoreBndr (UfUsageBinder name) thing_inside
+ = bindLocalsRn "unfolding usage" [name] $ \ [name'] ->
+ thing_inside (UfUsageBinder name')
+
+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 (UfUsageArg u) = lookupOccRn u `thenRn` \ u' -> returnRn (UfUsageArg u')
+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
+ 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')
- dup_item (DefaultDecl _ locn)
- = addShortErrLocLine locn (\ sty ->
- ppStr "here was another default declaration") sty
+rnCoreDefault UfNoDefault = returnRn UfNoDefault
+rnCoreDefault (UfBindDefault bndr rhs) = bindLocalsRn "unfolding default" [bndr] $ \ [bndr'] ->
+ rnCoreExpr rhs `thenRn` \ rhs' ->
+ returnRn (UfBindDefault bndr' rhs')
-undefinedFixityDeclErr locn decl
- = addErrLoc locn "fixity declaration for unknown operator" $ \ sty ->
- ppr sty decl
+rnCoercion (UfIn n) = lookupOccRn n `thenRn` \ n' -> returnRn (UfIn n')
+rnCoercion (UfOut n) = lookupOccRn n `thenRn` \ n' -> returnRn (UfOut n')
-dupFixityDeclErr locn dups
- = addErrLoc locn "multiple fixity declarations for same operator" $ \ sty ->
- ppAboves (map (ppr sty) dups)
+rnCorePrim (UfOtherOp op)
+ = lookupOccRn op `thenRn` \ op' ->
+ returnRn (UfOtherOp op')
-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)
+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}
-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:"])
+%*********************************************************
+%* *
+\subsection{Errors}
+%* *
+%*********************************************************
+
+\begin{code}
+derivingNonStdClassErr clas sty
+ = hsep [ptext SLIT("non-standard class"), ppr sty clas, ptext SLIT("in deriving clause")]
+
+classTyVarNotInOpTyErr clas_tyvar sig sty
+ = hang (hsep [ptext SLIT("Class type variable"),
+ ppr sty clas_tyvar,
+ ptext SLIT("does not appear in method signature")])
4 (ppr sty sig)
-dupClassAssertWarn ctxt locn dups
- = addShortWarnLocLine locn $ \ sty ->
- ppHang (ppBesides [ppStr "Duplicate class assertion `", ppr sty dups, ppStr "' in context:"])
+dupClassAssertWarn ctxt dups sty
+ = hang (hcat [ptext SLIT("Duplicate class assertion `"),
+ ppr sty dups,
+ ptext SLIT("' in context:")])
4 (ppr sty ctxt)
+
+badDataCon name sty
+ = hsep [ptext SLIT("Illegal data constructor name:"), ppr sty name]
+
+allOfNonTyVar ty sty
+ = hsep [ptext SLIT("`All' applied to a non-type variable:"), ppr sty ty]
+
+ctxtErr1 doc tyvars sty
+ = hsep [ptext SLIT("Context constrains in-scope type variable(s)"),
+ hsep (punctuate comma (map (ppr sty) tyvars))]
+ $$
+ nest 4 (ptext SLIT("in") <+> doc sty)
+
+ctxtErr2 doc tyvars ty sty
+ = (ptext SLIT("Context constrains type variable(s)")
+ <+> hsep (punctuate comma (map (ppr sty) tyvars)))
+ $$
+ nest 4 (vcat [ptext SLIT("that do not appear in") <+> ppr sty ty,
+ ptext SLIT("in") <+> doc sty])
\end{code}
projects / ghc-hetmet.git / blobdiff