)
import RnEnv
-import PrelNames ( mkUnboundName )
import DynFlags ( DynFlag(..) )
import Name
import NameEnv
rnTopBindsLHS fix_env binds =
(uncurry $ rnValBindsLHSFromDoc (topRecNameMaker fix_env)) (bindersAndDoc binds) binds
-rnTopBindsRHS :: [Name] -- the names bound by these binds
+rnTopBindsRHS :: NameSet -- Names bound by these binds
-> HsValBindsLR Name RdrName
-> RnM (HsValBinds Name, DefUses)
rnTopBindsRHS bound_names binds =
then rnTopBindsBoot binds
else rnValBindsRHSGen (\x -> x) -- don't trim free vars
bound_names binds }
-
--- wrapper if we don't need to do anything in between the left and right,
+-- Wrapper if we don't need to do anything in between the left and right,
-- or anything else in the scope of the left
--
--- never used when there are fixity declarations
+-- Never used when there are fixity declarations
rnTopBinds :: HsValBinds RdrName
-> RnM (HsValBinds Name, DefUses)
rnTopBinds b =
do nl <- rnTopBindsLHS emptyFsEnv b
let bound_names = map unLoc (collectHsValBinders nl)
- bindLocalNames bound_names $ rnTopBindsRHS bound_names nl
+ bindLocalNames bound_names $ rnTopBindsRHS (mkNameSet bound_names) nl
rnTopBindsBoot :: HsValBindsLR Name RdrName -> RnM (HsValBinds Name, DefUses)
rnValBindsRHSGen :: (FreeVars -> FreeVars) -- for trimming free var sets
-- The trimming function trims the free vars we attach to a
-- binding so that it stays reasonably small
- -> [Name] -- names bound by the LHSes
+ -> NameSet -- Names bound by the LHSes
-> HsValBindsLR Name RdrName
-> RnM (HsValBinds Name, DefUses)
rnValBindsRHSGen trim bound_names (ValBindsIn mbinds sigs) = do
-- rename the sigs
- sigs' <- renameSigs (Just (mkNameSet bound_names)) okBindSig sigs
+ sigs' <- renameSigs (Just bound_names) okBindSig sigs
-- rename the RHSes
binds_w_dus <- mapBagM (rnBind (mkSigTvFn sigs') trim) mbinds
case depAnalBinds binds_w_dus of
-- it doesn't (and can't: we don't have the thing inside the binds) happen here
--
-- The client is also responsible for bringing the fixities into scope
-rnValBindsRHS :: [Name] -- names bound by the LHSes
+rnValBindsRHS :: NameSet -- names bound by the LHSes
-> HsValBindsLR Name RdrName
-> RnM (HsValBinds Name, DefUses)
rnValBindsRHS bound_names binds =
rnValBindsRHSGen (\ fvs -> -- only keep the names the names from this group
- intersectNameSet (mkNameSet bound_names) fvs) bound_names binds
+ intersectNameSet bound_names fvs) bound_names binds
-- for local binds
; bindLocalNamesFV_WithFixities bound_names new_fixities $ do
{ -- (C) Do the RHS and thing inside
- (binds', dus) <- rnValBindsRHS bound_names new_lhs
+ (binds', dus) <- rnValBindsRHS (mkNameSet bound_names) new_lhs
; (result, result_fvs) <- thing_inside binds'
-- Report unused bindings based on the (accurate)
renameSig :: Maybe NameSet -> Sig RdrName -> RnM (Sig Name)
-- FixitySig is renamed elsewhere.
renameSig mb_names sig@(TypeSig v ty)
- = do { new_v <- lookupSigLocOccRn mb_names sig v
+ = do { new_v <- lookupSigOccRn mb_names sig v
; new_ty <- rnHsSigType (quotes (ppr v)) ty
; return (TypeSig new_v new_ty) }
; return (SpecInstSig new_ty) }
renameSig mb_names sig@(SpecSig v ty inl)
- = do { new_v <- lookupSigLocOccRn mb_names sig v
+ = do { new_v <- lookupSigOccRn mb_names sig v
; new_ty <- rnHsSigType (quotes (ppr v)) ty
; return (SpecSig new_v new_ty inl) }
renameSig mb_names sig@(InlineSig v s)
- = do { new_v <- lookupSigLocOccRn mb_names sig v
+ = do { new_v <- lookupSigOccRn mb_names sig v
; return (InlineSig new_v s) }
renameSig mb_names sig@(FixSig (FixitySig v f))
- = do { new_v <- lookupSigLocOccRn mb_names sig v
+ = do { new_v <- lookupSigOccRn mb_names sig v
; return (FixSig (FixitySig new_v f)) }
-
--- lookupSigOccRn is used for type signatures and pragmas
--- Is this valid?
--- module A
--- import M( f )
--- f :: Int -> Int
--- f x = x
--- It's clear that the 'f' in the signature must refer to A.f
--- The Haskell98 report does not stipulate this, but it will!
--- So we must treat the 'f' in the signature in the same way
--- as the binding occurrence of 'f', using lookupBndrRn
---
--- However, consider this case:
--- import M( f )
--- f :: Int -> Int
--- g x = x
--- We don't want to say 'f' is out of scope; instead, we want to
--- return the imported 'f', so that later on the reanamer will
--- correctly report "misplaced type sig".
-
-lookupSigLocOccRn :: Maybe NameSet -> Sig RdrName -> Located RdrName -> RnM (Located Name)
-lookupSigLocOccRn mb_names sig = wrapLocM (lookupSigOccRn mb_names sig)
-
-lookupSigOccRn :: Maybe NameSet -> Sig RdrName -> RdrName -> RnM Name
-lookupSigOccRn mb_names sig v
- = do { mb_n <- lookupBndrRn_maybe v
- ; case mb_n of {
- Just n -> case mb_names of {
- Nothing -> return n ;
- Just ns | n `elemNameSet` ns -> return n
- | otherwise -> bale_out_with local_msg } ;
-
- Nothing -> do
- { mb_n <- lookupGreRn_maybe v
- ; case mb_n of
- Just _ -> bale_out_with import_msg
- Nothing -> bale_out_with empty
- } }}
- where
- bale_out_with msg
- = do { addErr (sep [ ptext (sLit "The") <+> hsSigDoc sig
- <+> ptext (sLit "for") <+> quotes (ppr v)
- , nest 2 $ ptext (sLit "lacks an accompanying binding")]
- $$ nest 2 msg)
- ; return (mkUnboundName v) }
-
- local_msg = parens $ ptext (sLit "The") <+> hsSigDoc sig <+> ptext (sLit "must be given where")
- <+> quotes (ppr v) <+> ptext (sLit "is declared")
-
- import_msg = parens $ ptext (sLit "You cannot give a") <+> hsSigDoc sig
- <+> ptext (sLit "an imported value")
\end{code}
\begin{code}
module RnEnv (
newTopSrcBinder, lookupFamInstDeclBndr,
- lookupLocatedBndrRn, lookupBndrRn, lookupBndrRn_maybe,
lookupLocatedTopBndrRn, lookupTopBndrRn,
lookupLocatedOccRn, lookupOccRn,
lookupLocatedGlobalOccRn, lookupGlobalOccRn,
lookupLocalDataTcNames, lookupSrcOcc_maybe,
+ lookupSigOccRn,
lookupFixityRn, lookupTyFixityRn,
lookupInstDeclBndr, lookupRecordBndr, lookupConstructorFields,
lookupSyntaxName, lookupSyntaxTable, lookupImportedName,
consDataConKey, hasKey, forall_tv_RDR )
import UniqSupply
import BasicTypes ( IPName, mapIPName, Fixity )
+import ErrUtils ( Message )
import SrcLoc
import Outputable
import Util
Looking up a name in the RnEnv.
\begin{code}
-lookupLocatedBndrRn :: Located RdrName -> RnM (Located Name)
-lookupLocatedBndrRn = wrapLocM lookupBndrRn
-
-lookupBndrRn :: RdrName -> RnM Name
-lookupBndrRn n = do nopt <- lookupBndrRn_maybe n
- case nopt of
- Just n' -> return n'
- Nothing -> do traceRn $ text "lookupTopBndrRn"
- unboundName n
-
lookupTopBndrRn :: RdrName -> RnM Name
lookupTopBndrRn n = do nopt <- lookupTopBndrRn_maybe n
case nopt of
Nothing -> do traceRn $ text "lookupTopBndrRn"
unboundName n
-lookupBndrRn_maybe :: RdrName -> RnM (Maybe Name)
--- NOTE: assumes that the SrcSpan of the binder has already been setSrcSpan'd
-lookupBndrRn_maybe rdr_name
- = getLocalRdrEnv `thenM` \ local_env ->
- case lookupLocalRdrEnv local_env rdr_name of
- Just name -> returnM (Just name)
- Nothing -> lookupTopBndrRn_maybe rdr_name
-
lookupLocatedTopBndrRn :: Located RdrName -> RnM (Located Name)
lookupLocatedTopBndrRn = wrapLocM lookupTopBndrRn
-- and only happens for failed lookups
if isQual rdr_name && allow_qual && mod == iNTERACTIVE
then lookupQualifiedName rdr_name
- else do
- traceRn $ text "lookupGlobalOccRn"
- unboundName rdr_name
+ else unboundName rdr_name
}
lookupImportedName :: RdrName -> TcRnIf m n Name
doc = ptext (sLit "Need to find") <+> ppr rdr_name
\end{code}
+lookupSigOccRn is used for type signatures and pragmas
+Is this valid?
+ module A
+ import M( f )
+ f :: Int -> Int
+ f x = x
+It's clear that the 'f' in the signature must refer to A.f
+The Haskell98 report does not stipulate this, but it will!
+So we must treat the 'f' in the signature in the same way
+as the binding occurrence of 'f', using lookupBndrRn
+
+However, consider this case:
+ import M( f )
+ f :: Int -> Int
+ g x = x
+We don't want to say 'f' is out of scope; instead, we want to
+return the imported 'f', so that later on the reanamer will
+correctly report "misplaced type sig".
+
+\begin{code}
+lookupSigOccRn :: Maybe NameSet -- Just ns => source file; these are the binders
+ -- in the same group
+ -- Nothing => hs-boot file; signatures without
+ -- binders are expected
+ -> Sig RdrName
+ -> Located RdrName -> RnM (Located Name)
+lookupSigOccRn mb_bound_names sig
+ = wrapLocM $ \ rdr_name ->
+ do { mb_name <- lookupBindGroupOcc mb_bound_names (hsSigDoc sig) rdr_name
+ ; case mb_name of
+ Left err -> do { addErr err; return (mkUnboundName rdr_name) }
+ Right name -> return name }
+
+lookupBindGroupOcc :: Maybe NameSet -- Just ns => source file; these are the binders
+ -- in the same group
+ -- Nothing => hs-boot file; signatures without
+ -- binders are expected
+ -> SDoc
+ -> RdrName -> RnM (Either Message Name)
+-- Looks up the RdrName, expecting it to resolve to one of the
+-- bound names passed in. If not, return an appropriate error message
+lookupBindGroupOcc mb_bound_names what rdr_name
+ = do { local_env <- getLocalRdrEnv
+ ; case lookupLocalRdrEnv local_env rdr_name of
+ Just n -> check_local_name n
+ Nothing -> do -- Not defined in a nested scope
+
+ { env <- getGlobalRdrEnv
+ ; let gres = lookupGlobalRdrEnv env (rdrNameOcc rdr_name)
+ ; case (filter isLocalGRE gres) of
+ (gre:_) -> check_local_name (gre_name gre)
+ -- If there is more than one local GRE for the
+ -- same OccName, that will be reported separately
+ [] | null gres -> bale_out_with empty
+ | otherwise -> bale_out_with import_msg
+ }}
+ where
+ check_local_name name -- The name is in scope, and not imported
+ = case mb_bound_names of
+ Just bound_names | not (name `elemNameSet` bound_names)
+ -> bale_out_with local_msg
+ _other -> return (Right name)
+
+ bale_out_with msg
+ = return (Left (sep [ ptext (sLit "The") <+> what
+ <+> ptext (sLit "for") <+> quotes (ppr rdr_name)
+ , nest 2 $ ptext (sLit "lacks an accompanying binding")]
+ $$ nest 2 msg))
+
+ local_msg = parens $ ptext (sLit "The") <+> what <+> ptext (sLit "must be given where")
+ <+> quotes (ppr rdr_name) <+> ptext (sLit "is declared")
+
+ import_msg = parens $ ptext (sLit "You cannot give a") <+> what
+ <+> ptext (sLit "for an imported value")
+
+---------------
+lookupLocalDataTcNames :: NameSet -> SDoc -> RdrName -> RnM [Name]
+-- GHC extension: look up both the tycon and data con
+-- for con-like things
+-- Complain if neither is in scope
+lookupLocalDataTcNames bound_names what rdr_name
+ | Just n <- isExact_maybe rdr_name
+ -- Special case for (:), which doesn't get into the GlobalRdrEnv
+ = return [n] -- For this we don't need to try the tycon too
+ | otherwise
+ = do { mb_gres <- mapM (lookupBindGroupOcc (Just bound_names) what)
+ (dataTcOccs rdr_name)
+ ; let (errs, names) = splitEithers mb_gres
+ ; when (null names) (addErr (head errs)) -- Bleat about one only
+ ; return names }
+
+dataTcOccs :: RdrName -> [RdrName]
+-- If the input is a data constructor, return both it and a type
+-- constructor. This is useful when we aren't sure which we are
+-- looking at.
+dataTcOccs rdr_name
+ | Just n <- isExact_maybe rdr_name -- Ghastly special case
+ , n `hasKey` consDataConKey = [rdr_name] -- see note below
+ | isDataOcc occ = [rdr_name, rdr_name_tc]
+ | otherwise = [rdr_name]
+ where
+ occ = rdrNameOcc rdr_name
+ rdr_name_tc = setRdrNameSpace rdr_name tcName
+
+-- If the user typed "[]" or "(,,)", we'll generate an Exact RdrName,
+-- and setRdrNameSpace generates an Orig, which is fine
+-- But it's not fine for (:), because there *is* no corresponding type
+-- constructor. If we generate an Orig tycon for GHC.Base.(:), it'll
+-- appear to be in scope (because Orig's simply allocate a new name-cache
+-- entry) and then we get an error when we use dataTcOccs in
+-- TcRnDriver.tcRnGetInfo. Large sigh.
+\end{code}
+
+
%*********************************************************
%* *
Fixities
lookupTyFixityRn :: Located Name -> RnM Fixity
lookupTyFixityRn (L _ n) = lookupFixityRn n
----------------
-lookupLocalDataTcNames :: RdrName -> RnM [Name]
--- GHC extension: look up both the tycon and data con
--- for con-like things
--- Complain if neither is in scope
-lookupLocalDataTcNames rdr_name
- | Just n <- isExact_maybe rdr_name
- -- Special case for (:), which doesn't get into the GlobalRdrEnv
- = return [n] -- For this we don't need to try the tycon too
- | otherwise
- = do { mb_gres <- mapM lookupGreLocalRn (dataTcOccs rdr_name)
- ; case [gre_name gre | Just gre <- mb_gres] of
- [] -> do {
- -- run for error reporting
- ; unboundName rdr_name
- ; return [] }
- names -> return names
- }
-
-dataTcOccs :: RdrName -> [RdrName]
--- If the input is a data constructor, return both it and a type
--- constructor. This is useful when we aren't sure which we are
--- looking at.
-dataTcOccs rdr_name
- | Just n <- isExact_maybe rdr_name -- Ghastly special case
- , n `hasKey` consDataConKey = [rdr_name] -- see note below
- | isDataOcc occ = [rdr_name_tc, rdr_name]
- | otherwise = [rdr_name]
- where
- occ = rdrNameOcc rdr_name
- rdr_name_tc = setRdrNameSpace rdr_name tcName
-
--- If the user typed "[]" or "(,,)", we'll generate an Exact RdrName,
--- and setRdrNameSpace generates an Orig, which is fine
--- But it's not fine for (:), because there *is* no corresponding type
--- constructor. If we generate an Orig tycon for GHC.Base.(:), it'll
--- appear to be in scope (because Orig's simply allocate a new name-cache
--- entry) and then we get an error when we use dataTcOccs in
--- TcRnDriver.tcRnGetInfo. Large sigh.
\end{code}
%************************************************************************
rn_rec_stmt all_bndrs (L loc (LetStmt (HsValBinds binds'))) _ = do
(binds', du_binds) <-
-- fixities and unused are handled above in rn_rec_stmts_and_then
- rnValBindsRHS all_bndrs binds'
+ rnValBindsRHS (mkNameSet all_bndrs) binds'
returnM [(duDefs du_binds, duUses du_binds,
emptyNameSet, L loc (LetStmt (HsValBinds binds')))]
bindLocalNames, checkDupRdrNames, mapFvRn,
)
import RnNames ( getLocalNonValBinders, extendGlobalRdrEnvRn )
-import HscTypes ( GenAvailInfo(..) )
+import HscTypes ( GenAvailInfo(..), availsToNameSet )
import RnHsDoc ( rnHsDoc, rnMbLHsDoc )
import TcRnMonad
-- Brings the binders of the group into scope in the appropriate places;
-- does NOT assume that anything is in scope already
rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name)
+-- Rename a HsGroup; used for normal source files *and* hs-boot files
rnSrcDecls group@(HsGroup {hs_valds = val_decls,
hs_tyclds = tycl_decls,
hs_instds = inst_decls,
-- (B) Bring top level binders (and their fixities) into scope,
-- *except* for the value bindings, which get brought in below.
- avails <- getLocalNonValBinders group ;
- tc_envs <- extendGlobalRdrEnvRn avails local_fix_env ;
+ -- However *do* include class ops, data constructors
+ -- And for hs-boot files *do* include the value signatures
+ tc_avails <- getLocalNonValBinders group ;
+ tc_envs <- extendGlobalRdrEnvRn tc_avails local_fix_env ;
setEnvs tc_envs $ do {
failIfErrsM ; -- No point in continuing if (say) we have duplicate declarations
-- It uses the fixity env from (A) to bind fixities for view patterns.
new_lhs <- rnTopBindsLHS local_fix_env val_decls ;
-- bind the LHSes (and their fixities) in the global rdr environment
- let { lhs_binders = map unLoc $ collectHsValBinders new_lhs;
- lhs_avails = map Avail lhs_binders
+ let { val_binders = map unLoc $ collectHsValBinders new_lhs ;
+ val_bndr_set = mkNameSet val_binders ;
+ all_bndr_set = val_bndr_set `unionNameSets` availsToNameSet tc_avails ;
+ val_avails = map Avail val_binders
} ;
- (tcg_env, tcl_env) <- extendGlobalRdrEnvRn lhs_avails local_fix_env ;
+ (tcg_env, tcl_env) <- extendGlobalRdrEnvRn val_avails local_fix_env ;
setEnvs (tcg_env, tcl_env) $ do {
-- Now everything is in scope, as the remaining renaming assumes.
-- (F) Rename Value declarations right-hand sides
traceRn (text "Start rnmono") ;
- (rn_val_decls, bind_dus) <- rnTopBindsRHS lhs_binders new_lhs ;
+ (rn_val_decls, bind_dus) <- rnTopBindsRHS val_bndr_set new_lhs ;
traceRn (text "finish rnmono" <+> ppr rn_val_decls) ;
-- (G) Rename Fixity and deprecations
- -- rename fixity declarations and error if we try to
+ -- Rename fixity declarations and error if we try to
-- fix something from another module (duplicates were checked in (A))
- rn_fix_decls <- rnSrcFixityDecls fix_decls ;
- -- rename deprec decls;
+ rn_fix_decls <- rnSrcFixityDecls all_bndr_set fix_decls ;
+
+ -- Rename deprec decls;
-- check for duplicates and ensure that deprecated things are defined locally
-- at the moment, we don't keep these around past renaming
- rn_warns <- rnSrcWarnDecls warn_decls ;
+ rn_warns <- rnSrcWarnDecls all_bndr_set warn_decls ;
-- (H) Rename Everything else
%*********************************************************
\begin{code}
-rnSrcFixityDecls :: [LFixitySig RdrName] -> RnM [LFixitySig Name]
+rnSrcFixityDecls :: NameSet -> [LFixitySig RdrName] -> RnM [LFixitySig Name]
-- Rename the fixity decls, so we can put
-- the renamed decls in the renamed syntax tree
-- Errors if the thing being fixed is not defined locally.
--
-- The returned FixitySigs are not actually used for anything,
-- except perhaps the GHCi API
-rnSrcFixityDecls fix_decls
+rnSrcFixityDecls bound_names fix_decls
= do fix_decls <- mapM rn_decl fix_decls
return (concat fix_decls)
where
rn_decl (L loc (FixitySig (L name_loc rdr_name) fixity))
= setSrcSpan name_loc $
-- this lookup will fail if the definition isn't local
- do names <- lookupLocalDataTcNames rdr_name
+ do names <- lookupLocalDataTcNames bound_names what rdr_name
return [ L loc (FixitySig (L name_loc name) fixity)
- | name <- names ]
+ | name <- names ]
+ what = ptext (sLit "fixity signature")
\end{code}
\begin{code}
-- checks that the deprecations are defined locally, and that there are no duplicates
-rnSrcWarnDecls :: [LWarnDecl RdrName] -> RnM Warnings
-rnSrcWarnDecls []
+rnSrcWarnDecls :: NameSet -> [LWarnDecl RdrName] -> RnM Warnings
+rnSrcWarnDecls _bound_names []
= returnM NoWarnings
-rnSrcWarnDecls decls
+rnSrcWarnDecls bound_names decls
= do { -- check for duplicates
; mappM_ (\ (lrdr:lrdr':_) -> addLocErr lrdr (dupWarnDecl lrdr')) warn_rdr_dups
; mappM (addLocM rn_deprec) decls `thenM` \ pairs_s ->
where
rn_deprec (Warning rdr_name txt)
-- ensures that the names are defined locally
- = lookupLocalDataTcNames rdr_name `thenM` \ names ->
+ = lookupLocalDataTcNames bound_names what rdr_name `thenM` \ names ->
returnM [(nameOccName name, txt) | name <- names]
+ what = ptext (sLit "deprecation")
+
-- look for duplicates among the OccNames;
-- we check that the names are defined above
-- invt: the lists returned by findDupsEq always have at least two elements
; let aux_binds = listToBag $ map (genAuxBind loc) $
rm_dups [] $ concat deriv_aux_binds
; rn_aux_lhs <- rnTopBindsLHS emptyFsEnv (ValBindsIn aux_binds [])
- ; let aux_names = map unLoc (collectHsValBinders rn_aux_lhs)
+ ; let aux_names = map unLoc (collectHsValBinders rn_aux_lhs)
; bindLocalNames aux_names $
- do { (rn_aux, _dus) <- rnTopBindsRHS aux_names rn_aux_lhs
+ do { (rn_aux, _dus) <- rnTopBindsRHS (mkNameSet aux_names) rn_aux_lhs
; rn_inst_infos <- mapM rn_inst_info inst_infos
; return (rn_inst_infos, rn_aux `plusHsValBinds` rn_gen) } }
projects / ghc-hetmet.git / commitdiff