#include "HsVersions.h"
module RnNames (
- getGlobalNames,
- GlobalNameInfo(..)
+ getGlobalNames
) where
-import PreludeGlaST ( MutableVar(..) )
-
-import Ubiq
-
-import HsSyn
-import RdrHsSyn
-import RnHsSyn
-
+IMP_Ubiq()
+
+import CmdLineOpts ( opt_SourceUnchanged, opt_NoImplicitPrelude )
+import HsSyn ( HsModule(..), HsDecl(..), FixityDecl(..), Fixity, Fake, InPat, IE(..), HsTyVar,
+ TyDecl, ClassDecl, InstDecl, DefaultDecl, ImportDecl(..), HsBinds, IfaceSig
+ )
+import HsBinds ( collectTopBinders )
+import HsImpExp ( ieName )
+import RdrHsSyn ( RdrNameHsDecl(..), RdrName(..), RdrNameIE(..), SYN_IE(RdrNameImportDecl),
+ SYN_IE(RdrNameHsModule), SYN_IE(RdrNameFixityDecl),
+ rdrNameOcc
+ )
+import RnHsSyn ( RenamedHsModule(..), RenamedFixityDecl(..) )
+import RnIfaces ( getInterfaceExports, getDeclBinders, checkUpToDate )
+import RnEnv
import RnMonad
-import RnIfaces ( IfaceCache(..), cachedIface, cachedDecl )
-import RnUtils ( RnEnv(..), emptyRnEnv, extendGlobalRnEnv,
- lubExportFlag, qualNameErr, dupNamesErr )
-import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst )
-
-
-import Bag ( emptyBag, unitBag, consBag, unionBags, unionManyBags,
- mapBag, listToBag, bagToList )
-import CmdLineOpts ( opt_NoImplicitPrelude )
-import ErrUtils ( Error(..), Warning(..), addShortErrLocLine )
-import FiniteMap ( emptyFM, addListToFM, lookupFM, fmToList, eltsFM, delListFromFM )
-import Id ( GenId )
-import Maybes ( maybeToBool, catMaybes, MaybeErr(..) )
-import Name ( RdrName(..), Name, isQual, mkTopLevName,
- mkImportedName, nameExportFlag, nameImportFlag,
- getLocalName, getSrcLoc, pprNonSym, moduleNamePair,
- isLexCon, isRdrLexCon, ExportFlag(..)
- )
-import PrelInfo ( BuiltinNames(..), BuiltinKeys(..) )
-import PrelMods ( fromPrelude, pRELUDE )
+import FiniteMap
+import PrelMods
+import UniqFM ( UniqFM, emptyUFM, addListToUFM_C, lookupUFM )
+import Bag ( Bag, bagToList )
+import Maybes ( maybeToBool, expectJust )
+import Name
import Pretty
-import SrcLoc ( SrcLoc, mkIfaceSrcLoc )
-import TyCon ( tyConDataCons )
-import UniqFM ( emptyUFM, addListToUFM_C, lookupUFM )
-import UniqSupply ( splitUniqSupply )
-import Util ( isIn, cmpPString, sortLt, removeDups, equivClasses, panic, assertPanic )
+import PprStyle ( PprStyle(..) )
+import Util ( panic, pprTrace, assertPanic )
\end{code}
-\begin{code}
-type GlobalNameInfo = (BuiltinNames,
- BuiltinKeys,
- Name -> ExportFlag, -- export flag
- Name -> [RdrName]) -- occurence names
-
-type RnM_Info s r = RnMonad GlobalNameInfo s r
-
-getGlobalNames ::
- IfaceCache
- -> GlobalNameInfo
- -> UniqSupply
- -> RdrNameHsModule
- -> IO (RnEnv,
- [Module], -- directly imported modules
- Bag (Module,RnName), -- unqualified imports from module
- Bag RenamedFixityDecl, -- imported fixity decls
- Bag Error,
- Bag Warning)
-
-getGlobalNames iface_cache info us
- (HsModule mod _ _ imports _ ty_decls _ cls_decls _ _ _ binds _ _)
- = case initRn True mod emptyRnEnv us1
- (setExtraRn info $
- getSourceNames ty_decls cls_decls binds)
- of { ((src_vals, src_tcs), src_errs, src_warns) ->
-
- doImportDecls iface_cache info us2 imports >>=
- \ (imp_vals, imp_tcs, imp_mods, unqual_imps, imp_fixes, imp_errs, imp_warns) ->
- let
- unqual_vals = mapBag (\rn -> (Unqual (getLocalName rn), rn)) src_vals
- unqual_tcs = mapBag (\rn -> (Unqual (getLocalName rn), rn)) src_tcs
+%************************************************************************
+%* *
+\subsection{Get global names}
+%* *
+%************************************************************************
- all_vals = bagToList (unqual_vals `unionBags` imp_vals)
- all_tcs = bagToList (unqual_tcs `unionBags` imp_tcs)
-
- (all_env, dups) = extendGlobalRnEnv emptyRnEnv all_vals all_tcs
-
- dup_errs = map dup_err (equivClasses cmp_rdr (bagToList dups))
- cmp_rdr (rdr1,_,_) (rdr2,_,_) = cmp rdr1 rdr2
- dup_err ((rdr,rn,rn'):rest) = globalDupNamesErr rdr (rn:rn': [rn|(_,_,rn)<-rest])
-
- all_errs = src_errs `unionBags` imp_errs `unionBags` listToBag dup_errs
- all_warns = src_warns `unionBags` imp_warns
- in
- return (all_env, imp_mods, unqual_imps, imp_fixes, all_errs, all_warns)
- }
+\begin{code}
+getGlobalNames :: RdrNameHsModule
+ -> RnMG (Maybe (ExportEnv, RnEnv, [AvailInfo]))
+ -- Nothing <=> no need to recompile
+
+getGlobalNames m@(HsModule this_mod _ exports imports _ _ mod_loc)
+ = fixRn (\ ~(rec_exp_fn, _) ->
+
+ -- PROCESS LOCAL DECLS
+ -- Do these *first* so that the correct provenance gets
+ -- into the global name cache.
+ importsFromLocalDecls rec_exp_fn m `thenRn` \ (local_rn_env, local_mod_avails) ->
+
+ -- PROCESS IMPORT DECLS
+ mapAndUnzipRn importsFromImportDecl all_imports
+ `thenRn` \ (imp_rn_envs, imp_avails_s) ->
+
+ -- CHECK FOR EARLY EXIT
+ checkEarlyExit this_mod `thenRn` \ early_exit ->
+ if early_exit then
+ returnRn (junk_exp_fn, Nothing)
+ else
+
+ -- COMBINE RESULTS
+ -- We put the local env first, so that a local provenance
+ -- "wins", even if a module imports itself.
+ foldlRn plusRnEnv emptyRnEnv imp_rn_envs `thenRn` \ imp_rn_env ->
+ plusRnEnv local_rn_env imp_rn_env `thenRn` \ rn_env ->
+ let
+ all_avails :: ModuleAvails
+ all_avails = foldr plusModuleAvails local_mod_avails imp_avails_s
+ local_avails = expectJust "getGlobalNames" (lookupModuleAvails local_mod_avails this_mod)
+ in
+
+ -- PROCESS EXPORT LISTS
+ exportsFromAvail this_mod exports all_avails rn_env
+ `thenRn` \ (export_fn, export_env) ->
+
+ returnRn (export_fn, Just (export_env, rn_env, local_avails))
+ ) `thenRn` \ (_, result) ->
+ returnRn result
where
- (us1, us2) = splitUniqSupply us
+ junk_exp_fn = error "RnNames:export_fn"
+
+ all_imports = prel_imports ++ imports
+
+ -- NB: opt_NoImplicitPrelude is slightly different to import Prelude ();
+ -- because the former doesn't even look at Prelude.hi for instance declarations,
+ -- whereas the latter does.
+ prel_imports | this_mod == pRELUDE ||
+ explicit_prelude_import ||
+ opt_NoImplicitPrelude
+ = []
+
+ | otherwise = [ImportDecl pRELUDE
+ False {- Not qualified -}
+ Nothing {- No "as" -}
+ Nothing {- No import list -}
+ mod_loc]
+
+ explicit_prelude_import
+ = not (null [ () | (ImportDecl mod qual _ _ _) <- imports, mod == pRELUDE ])
\end{code}
-
-*********************************************************
-* *
-\subsection{Top-level source names}
-* *
-*********************************************************
-
+
\begin{code}
-getSourceNames ::
- [RdrNameTyDecl]
- -> [RdrNameClassDecl]
- -> RdrNameHsBinds
- -> RnM_Info s (Bag RnName, -- values
- Bag RnName) -- tycons/classes
-
-getSourceNames ty_decls cls_decls binds
- = mapAndUnzipRn getTyDeclNames ty_decls `thenRn` \ (tycon_s, constrs_s) ->
- mapAndUnzipRn getClassNames cls_decls `thenRn` \ (cls_s, cls_ops_s) ->
- getTopBindsNames binds `thenRn` \ bind_names ->
- returnRn (unionManyBags constrs_s `unionBags`
- unionManyBags cls_ops_s `unionBags` bind_names,
- listToBag tycon_s `unionBags` listToBag cls_s)
-
-
-getTyDeclNames :: RdrNameTyDecl
- -> RnM_Info s (RnName, Bag RnName) -- tycon and constrs
-
-getTyDeclNames (TyData _ tycon _ condecls _ _ src_loc)
- = newGlobalName src_loc Nothing tycon `thenRn` \ tycon_name ->
- mapRn (getConDeclName (Just (nameExportFlag tycon_name)))
- condecls `thenRn` \ con_names ->
- returnRn (RnData tycon_name con_names,
- listToBag (map (\ n -> RnConstr n tycon_name) con_names))
-
-getTyDeclNames (TyNew _ tycon _ condecls _ _ src_loc)
- = newGlobalName src_loc Nothing tycon `thenRn` \ tycon_name ->
- mapRn (getConDeclName (Just (nameExportFlag tycon_name)))
- condecls `thenRn` \ con_names ->
- returnRn (RnData tycon_name con_names,
- listToBag (map (\ n -> RnConstr n tycon_name) con_names))
-
-getTyDeclNames (TySynonym tycon _ _ src_loc)
- = newGlobalName src_loc Nothing tycon `thenRn` \ tycon_name ->
- returnRn (RnSyn tycon_name, emptyBag)
-
-getConDeclName exp (ConDecl con _ src_loc)
- = newGlobalName src_loc exp con
-getConDeclName exp (ConOpDecl _ op _ src_loc)
- = newGlobalName src_loc exp op
-getConDeclName exp (NewConDecl con _ src_loc)
- = newGlobalName src_loc exp con
-getConDeclName exp (RecConDecl con fields src_loc)
- = panic "getConDeclName:RecConDecl"
- newGlobalName src_loc exp con
-
-
-getClassNames :: RdrNameClassDecl
- -> RnM_Info s (RnName, Bag RnName) -- class and class ops
-
-getClassNames (ClassDecl _ cname _ sigs _ _ src_loc)
- = newGlobalName src_loc Nothing cname `thenRn` \ class_name ->
- getClassOpNames (Just (nameExportFlag class_name))
- sigs `thenRn` \ op_names ->
- returnRn (RnClass class_name op_names,
- listToBag (map (\ n -> RnClassOp n class_name) op_names))
-
-getClassOpNames exp []
- = returnRn []
-getClassOpNames exp (ClassOpSig op _ _ src_loc : sigs)
- = newGlobalName src_loc exp op `thenRn` \ op_name ->
- getClassOpNames exp sigs `thenRn` \ op_names ->
- returnRn (op_name : op_names)
-getClassOpNames exp (_ : sigs)
- = getClassOpNames exp sigs
+checkEarlyExit mod
+ = checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ -- Found errors already, so exit now
+ returnRn True
+ else
+ if not opt_SourceUnchanged then
+ -- Source code changed and no errors yet... carry on
+ returnRn False
+ else
+ -- Unchanged source, and no errors yet; see if usage info
+ -- up to date, and exit if so
+ checkUpToDate mod `thenRn` \ up_to_date ->
+ returnRn up_to_date
\end{code}
-
-*********************************************************
-* *
-\subsection{Bindings}
-* *
-*********************************************************
+
\begin{code}
-getTopBindsNames :: RdrNameHsBinds
- -> RnM_Info s (Bag RnName)
-
-getTopBindsNames binds = doBinds binds
-
-doBinds EmptyBinds = returnRn emptyBag
-doBinds (SingleBind bind) = doBind bind
-doBinds (BindWith bind sigs) = doBind bind
-doBinds (ThenBinds binds1 binds2)
- = andRn unionBags (doBinds binds1) (doBinds binds2)
-
-doBind EmptyBind = returnRn emptyBag
-doBind (NonRecBind mbind) = doMBinds mbind
-doBind (RecBind mbind) = doMBinds mbind
-
-doMBinds EmptyMonoBinds = returnRn emptyBag
-doMBinds (PatMonoBind pat grhss_and_binds locn) = doPat locn pat
-doMBinds (FunMonoBind p_name _ _ locn) = doName locn p_name
-doMBinds (AndMonoBinds mbinds1 mbinds2)
- = andRn unionBags (doMBinds mbinds1) (doMBinds mbinds2)
-
-doPats locn pats
- = mapRn (doPat locn) pats `thenRn` \ pats_s ->
- returnRn (unionManyBags pats_s)
-
-doPat locn WildPatIn = returnRn emptyBag
-doPat locn (LitPatIn _) = returnRn emptyBag
-doPat locn (LazyPatIn pat) = doPat locn pat
-doPat locn (VarPatIn var) = doName locn var
-doPat locn (NegPatIn pat) = doPat locn pat
-doPat locn (ParPatIn pat) = doPat locn pat
-doPat locn (ListPatIn pats) = doPats locn pats
-doPat locn (TuplePatIn pats) = doPats locn pats
-doPat locn (ConPatIn name pats) = doPats locn pats
-doPat locn (ConOpPatIn p1 op p2)
- = andRn unionBags (doPat locn p1) (doPat locn p2)
-doPat locn (AsPatIn as_name pat)
- = andRn unionBags (doName locn as_name) (doPat locn pat)
-doPat locn (RecPatIn name fields)
- = mapRn (doField locn) fields `thenRn` \ fields_s ->
- returnRn (unionManyBags fields_s)
-
-doField locn (_, pat, _) = doPat locn pat
-
-doName locn rdr
- = newGlobalName locn Nothing rdr `thenRn` \ name ->
- returnRn (unitBag (RnName name))
-\end{code}
+importsFromImportDecl :: RdrNameImportDecl
+ -> RnMG (RnEnv, ModuleAvails)
-*********************************************************
-* *
-\subsection{Creating a new global name}
-* *
-*********************************************************
-
-\begin{code}
-newGlobalName :: SrcLoc -> Maybe ExportFlag
- -> RdrName -> RnM_Info s Name
-
-newGlobalName locn maybe_exp rdr
- = getExtraRn `thenRn` \ (_,b_keys,exp_fn,occ_fn) ->
- getModuleRn `thenRn` \ mod ->
- rnGetUnique `thenRn` \ u ->
+importsFromImportDecl (ImportDecl mod qual_only as_mod import_spec loc)
+ = pushSrcLocRn loc $
+ getInterfaceExports mod `thenRn` \ (avails, fixities) ->
+ filterImports mod import_spec avails `thenRn` \ filtered_avails ->
let
- (uniq, unqual)
- = case rdr of
- Qual m n -> (u, n)
- Unqual n -> case (lookupFM b_keys n) of
- Nothing -> (u, n)
- Just (key,_) -> (key, n)
-
- orig = if fromPrelude mod
- then (Unqual unqual)
- else (Qual mod unqual)
-
- exp = case maybe_exp of
- Just exp -> exp
- Nothing -> exp_fn n
-
- n = mkTopLevName uniq orig locn exp (occ_fn n)
+ filtered_avails' = [ Avail (set_name_prov n) (map set_name_prov ns)
+ | Avail n ns <- filtered_avails
+ ]
+ fixities' = [ (occ,(fixity,provenance)) | (occ,fixity) <- fixities ]
in
- addErrIfRn (isQual rdr) (qualNameErr "name in definition" (rdr, locn)) `thenRn_`
- returnRn n
+ qualifyImports mod
+ True -- Want qualified names
+ (not qual_only) -- Maybe want unqualified names
+ as_mod
+ (ExportEnv filtered_avails' fixities')
+ where
+ set_name_prov name = setNameProvenance name provenance
+ provenance = Imported mod loc
\end{code}
-*********************************************************
-* *
-\subsection{Imported names}
-* *
-*********************************************************
\begin{code}
-type ImportNameInfo = (GlobalNameInfo,
- FiniteMap (Module,FAST_STRING) RnName, -- values imported so far
- FiniteMap (Module,FAST_STRING) RnName, -- tycons/classes imported so far
- Name -> ExportFlag) -- import flag
-
-type RnM_IInfo s r = RnMonad ImportNameInfo s r
-
-doImportDecls ::
- IfaceCache
- -> GlobalNameInfo -- builtin and knot name info
- -> UniqSupply
- -> [RdrNameImportDecl] -- import declarations
- -> IO (Bag (RdrName,RnName), -- imported values in scope
- Bag (RdrName,RnName), -- imported tycons/classes in scope
- [Module], -- directly imported modules
- Bag (Module,RnName), -- unqualified import from module
- Bag RenamedFixityDecl, -- fixity info for imported names
- Bag Error,
- Bag Warning)
-
-doImportDecls iface_cache g_info us src_imps
- = fixIO ( \ ~(_, _, _, _, _, _, rec_imp_flags) ->
- let
- rec_imp_fm = addListToUFM_C lubExportFlag emptyUFM (bagToList rec_imp_flags)
-
- rec_imp_fn :: Name -> ExportFlag
- rec_imp_fn n = case lookupUFM rec_imp_fm n of
- Nothing -> panic "RnNames:rec_imp_fn"
- Just flag -> flag
-
- i_info = (g_info, emptyFM, emptyFM, rec_imp_fn)
- in
- doImports iface_cache i_info us (qprel_imp ++ prel_imp ++ src_imps)
- ) >>= \ (vals, tcs, unquals, fixes, errs, warns, _) ->
- let
- imp_mods = [ mod | ImportDecl mod _ _ _ _ <- src_imps ]
- imp_warns = listToBag (map dupImportWarn imp_dups)
- prel_warns = listToBag (map qualPreludeImportWarn qual_prels)
-
- (_, imp_dups) = removeDups cmp_mod src_imps
- cmp_mod (ImportDecl m1 _ _ _ _) (ImportDecl m2 _ _ _ _) = cmpPString m1 m2
- qual_prels = [imp | imp@(ImportDecl mod qual _ _ _) <- src_imps,
- fromPrelude mod && qual]
- in
- return (vals, tcs, imp_mods, unquals, fixes, errs,
- prel_warns `unionBags` imp_warns `unionBags` warns)
+importsFromLocalDecls rec_exp_fn (HsModule mod _ _ _ fix_decls decls _)
+ = foldlRn getLocalDeclBinders [] decls `thenRn` \ avails ->
+ mapRn fixityFromFixDecl fix_decls `thenRn` \ fixities ->
+ qualifyImports mod
+ False -- Don't want qualified names
+ True -- Want unqualified names
+ Nothing -- No "as M" part
+ (ExportEnv avails fixities)
where
- explicit_prelude_import
- = null [() | (ImportDecl mod qual _ _ _) <- src_imps,
- fromPrelude mod && not qual]
-
- qprel_imp = if opt_NoImplicitPrelude
- then [{-the flag really means it: *NO* implicit "import Prelude" -}]
- else [ImportDecl pRELUDE True Nothing Nothing mkIfaceSrcLoc]
-
- prel_imp = if not explicit_prelude_import || opt_NoImplicitPrelude
- then
- [ {-prelude imported explicitly => no import Prelude-} ]
- else
- [ImportDecl pRELUDE False Nothing Nothing mkIfaceSrcLoc]
-
-doImports iface_cache i_info us []
- = return (emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag)
-doImports iface_cache i_info@(g_info,done_vals,done_tcs,imp_fn) us (imp:imps)
- = doImport iface_cache i_info us1 imp
- >>= \ (vals1, tcs1, unquals1, fixes1, errs1, warns1, imps1) ->
- let
- new_vals = [ (moduleNamePair rn, rn) | (_,rn) <- bagToList vals1,
- not (maybeToBool (lookupFM done_vals (moduleNamePair rn))) ]
- -- moduleNamePair computed twice
- ext_vals = addListToFM done_vals new_vals
-
- new_tcs = [ (moduleNamePair rn, rn) | (_,rn) <- bagToList tcs1,
- not (maybeToBool (lookupFM done_tcs (moduleNamePair rn))) ]
- ext_tcs = addListToFM done_tcs new_tcs
- in
- doImports iface_cache (g_info,ext_vals,ext_tcs,imp_fn) us2 imps
- >>= \ (vals2, tcs2, unquals2, fixes2, errs2, warns2, imps2) ->
- return (vals1 `unionBags` vals2,
- tcs1 `unionBags` tcs2,
- unquals1 `unionBags` unquals2,
- fixes1 `unionBags` fixes2,
- errs1 `unionBags` errs2,
- warns1 `unionBags` warns2,
- imps1 `unionBags` imps2)
- where
- (us1, us2) = splitUniqSupply us
-
-
-doImport :: IfaceCache
- -> ImportNameInfo
- -> UniqSupply
- -> RdrNameImportDecl
- -> IO (Bag (RdrName,RnName), -- values
- Bag (RdrName,RnName), -- tycons/classes
- Bag (Module,RnName), -- unqual imports
- Bag RenamedFixityDecl,
- Bag Error,
- Bag Warning,
- Bag (RnName,ExportFlag)) -- import flags
-
-doImport iface_cache info us (ImportDecl mod qual maybe_as maybe_spec src_loc)
- = cachedIface iface_cache mod >>= \ maybe_iface ->
- case maybe_iface of
- Failed err ->
- return (emptyBag, emptyBag, emptyBag, emptyBag,
- unitBag err, emptyBag, emptyBag)
- Succeeded iface ->
- let
- (b_vals, b_tcs, maybe_spec') = getBuiltins info mod maybe_spec
- (ies, chk_ies, get_errs) = getOrigIEs iface maybe_spec'
- in
- doOrigIEs iface_cache info mod src_loc us ies
- >>= \ (ie_vals, ie_tcs, imp_flags, errs, warns) ->
- accumulate (map (checkOrigIE iface_cache) chk_ies)
- >>= \ chk_errs_warns ->
- accumulate (map (getFixityDecl iface_cache) (bagToList ie_vals))
- >>= \ fix_maybes_errs ->
- let
- (chk_errs, chk_warns) = unzip chk_errs_warns
- (fix_maybes, fix_errs) = unzip fix_maybes_errs
+ newLocalName rdr_name loc
+ = newLocallyDefinedGlobalName mod (rdrNameOcc rdr_name) rec_exp_fn loc
- final_vals = mapBag fst_occ b_vals `unionBags` mapBag pair_occ ie_vals
- final_tcs = mapBag fst_occ b_tcs `unionBags` mapBag pair_occ ie_tcs
+ getLocalDeclBinders avails (ValD binds)
+ = mapRn do_one (bagToList (collectTopBinders binds)) `thenRn` \ val_avails ->
+ returnRn (val_avails ++ avails)
- unquals = if qual then emptyBag
- else mapBag pair_as (ie_vals `unionBags` ie_tcs)
+ getLocalDeclBinders avails decl
+ = getDeclBinders newLocalName decl `thenRn` \ avail ->
+ returnRn (avail : avails)
- final_fixes = listToBag (catMaybes fix_maybes)
+ do_one (rdr_name, loc)
+ = newLocalName rdr_name loc `thenRn` \ name ->
+ returnRn (Avail name [])
+\end{code}
- final_errs = mapBag (\ err -> err mod src_loc) (unionManyBags (get_errs:chk_errs))
- `unionBags` errs `unionBags` unionManyBags fix_errs
- final_warns = mapBag (\ warn -> warn mod src_loc) (unionManyBags chk_warns)
- `unionBags` warns
- in
- return (final_vals, final_tcs, unquals, final_fixes,
- final_errs, final_warns, imp_flags)
- where
- as_mod = case maybe_as of {Nothing -> mod; Just as_this -> as_this}
- mk_occ str = if qual then Qual as_mod str else Unqual str
+%************************************************************************
+%* *
+\subsection{Filtering imports}
+%* *
+%************************************************************************
- fst_occ (str, rn) = (mk_occ str, rn)
- pair_occ rn = (mk_occ (getLocalName rn), rn)
- pair_as rn = (as_mod, rn)
+@filterImports@ takes the @ExportEnv@ telling what the imported module makes
+available, and filters it through the import spec (if any).
+\begin{code}
+filterImports :: Module
+ -> Maybe (Bool, [RdrNameIE]) -- Import spec; True => hidin
+ -> [AvailInfo] -- What's available
+ -> RnMG [AvailInfo] -- What's actually imported
+ -- Complains if import spec mentions things the
+ -- module doesn't export
-getBuiltins info mod maybe_spec
- | not (fromPrelude mod)
- = (emptyBag, emptyBag, maybe_spec)
+filterImports mod Nothing imports
+ = returnRn imports
-getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec
- = case maybe_spec of
- Nothing -> (all_vals, all_tcs, Nothing)
+filterImports mod (Just (want_hiding, import_items)) avails
+ = -- Check that each import item mentions things that are actually available
+ mapRn check_import_item import_items `thenRn_`
- Just (True, ies) -> -- hiding does not work for builtin names
- (all_vals, all_tcs, maybe_spec)
+ -- Return filtered environment; no need to filter fixities
+ returnRn (map new_avail avails)
- Just (False, ies) -> let
- (vals,tcs,ies_left) = do_builtin ies
- in
- (vals, tcs, Just (False, ies_left))
where
- all_vals = do_all_builtin (fmToList b_val_names)
- all_tcs = do_all_builtin (fmToList b_tc_names)
+ import_fm :: FiniteMap OccName RdrNameIE
+ import_fm = listToFM [(ieOcc ie, ie) | ie <- import_items]
+
+ avail_fm :: FiniteMap OccName AvailInfo
+ avail_fm = listToFM [(nameOccName name, avail) | avail@(Avail name ns) <- avails]
+
+ new_avail NotAvailable = NotAvailable
+ new_avail avail@(Avail name _)
+ | not in_import_items && want_hiding = avail
+ | not in_import_items && not want_hiding = NotAvailable
+ | in_import_items && want_hiding = NotAvailable
+ | in_import_items && not want_hiding = filtered_avail
+ where
+ maybe_import_item = lookupFM import_fm (nameOccName name)
+ in_import_items = maybeToBool maybe_import_item
+ Just import_item = maybe_import_item
+ filtered_avail = filterAvail import_item avail
+
+ check_import_item :: RdrNameIE -> RnMG ()
+ check_import_item item
+ = checkRn (maybeToBool maybe_matching_avail && sub_names_ok item avail)
+ (badImportItemErr mod item)
+ where
+ item_name = ieOcc item
+ maybe_matching_avail = lookupFM avail_fm item_name
+ Just avail = maybe_matching_avail
+
+ sub_names_ok (IEVar _) _ = True
+ sub_names_ok (IEThingAbs _) _ = True
+ sub_names_ok (IEThingAll _) _ = True
+ sub_names_ok (IEThingWith _ wanted) (Avail _ has) = all ((`elem` has_list) . rdrNameOcc) wanted
+ where
+ has_list = map nameOccName has
+ sub_names_ok other1 other2 = False
+\end{code}
- do_all_builtin [] = emptyBag
- do_all_builtin ((str,rn):rest)
- = (str, rn) `consBag` do_all_builtin rest
- do_builtin [] = (emptyBag,emptyBag,[])
- do_builtin (ie:ies)
- = let str = unqual_str (ie_name ie)
- in
- case (lookupFM b_tc_names str) of -- NB: we favour the tycon/class FM...
- Just rn -> case (ie,rn) of
- (IEThingAbs _, WiredInTyCon tc)
- -> (vals, (str, rn) `consBag` tcs, ies_left)
- (IEThingAll _, WiredInTyCon tc)
- -> (listToBag (map (\ id -> (getLocalName id, WiredInId id))
- (tyConDataCons tc))
- `unionBags` vals,
- (str,rn) `consBag` tcs, ies_left)
- _ -> panic "importing builtin names (1)"
-
- Nothing ->
- case (lookupFM b_val_names str) of
- Nothing -> (vals, tcs, ie:ies_left)
- Just rn -> case (ie,rn) of
- (IEVar _, WiredInId _)
- -> ((str, rn) `consBag` vals, tcs, ies_left)
- _ -> panic "importing builtin names (2)"
- where
- (vals, tcs, ies_left) = do_builtin ies
-
-
-getOrigIEs (ParsedIface _ _ _ _ exps _ _ _ _ _ _) Nothing -- import all
- = (map mkAllIE (eltsFM exps), [], emptyBag)
-
-getOrigIEs (ParsedIface _ _ _ _ exps _ _ _ _ _ _) (Just (True, ies)) -- import hiding
- = (map mkAllIE (eltsFM exps_left), found_ies, errs)
- where
- (found_ies, errs) = lookupIEs exps ies
- exps_left = delListFromFM exps (map (getLocalName.ie_name.fst) found_ies)
-getOrigNames (ParsedIface _ _ _ _ exps _ _ _ _ _ _) (Just (False, ies))
- = (map fst found_ies, found_ies, errs)
- where
- (found_ies, errs) = lookupIEs exps ies
-
-
-mkAllIE (orig,ExportAbs)
- = ASSERT(isLexCon (getLocalName orig))
- IEThingAbs orig
-mkAllIE (orig, ExportAll)
- | isLexCon (getLocalName orig)
- = IEThingAll orig
- | otherwise
- = IEVar orig
-
-
-lookupIEs exps []
- = ([], emptyBag)
-lookupIEs exps (ie:ies)
- = case lookupFM exps (unqual_str (ie_name ie)) of
- Nothing ->
- (orig_ies, unknownImpSpecErr ie `consBag` errs)
- Just (orig,flag) ->
- (orig_ie orig flag ie ++ orig_ies,
- adderr_if (seen_ie orig orig_ies) (duplicateImpSpecErr ie) errs)
- where
- (orig_ies, errs) = lookupIEs exps ies
+%************************************************************************
+%* *
+\subsection{Qualifiying imports}
+%* *
+%************************************************************************
- orig_ie orig flag (IEVar n) = [(IEVar orig, flag)]
- orig_ie orig flag (IEThingAbs n) = [(IEThingAbs orig, flag)]
- orig_ie orig flag (IEThingAll n) = [(IEThingAll orig, flag)]
- orig_ie orig flag (IEThingWith n ns) = [(IEThingWith orig ns, flag)]
+@qualifyImports@ takes the @ExportEnv@ after filtering through the import spec
+of an import decl, and deals with producing an @RnEnv@ with the
+right qaulified names. It also turns the @Names@ in the @ExportEnv@ into
+fully fledged @Names@.
- seen_ie orig seen_ies = any (\ (ie,_) -> orig == ie_name ie) seen_ies
+\begin{code}
+qualifyImports :: Module -- Imported module
+ -> Bool -- True <=> want qualified import
+ -> Bool -- True <=> want unqualified import
+ -> Maybe Module -- Optional "as M" part
+ -> ExportEnv -- What's imported
+ -> RnMG (RnEnv, ModuleAvails)
+
+qualifyImports this_mod qual_imp unqual_imp as_mod (ExportEnv avails fixities)
+ = -- Make the qualified-name environments, checking of course for clashes
+ foldlRn add_name emptyNameEnv avails `thenRn` \ name_env ->
+ foldlRn (add_fixity name_env) emptyFixityEnv fixities `thenRn` \ fixity_env ->
+ returnRn (RnEnv name_env fixity_env, mod_avail_env)
+ where
+ show_it (rdr, (fix,prov)) = ppSep [ppLbrack, ppr PprDebug rdr, ppr PprDebug fix, pprProvenance PprDebug prov, ppRbrack]
+
+ qual_mod = case as_mod of
+ Nothing -> this_mod
+ Just another_name -> another_name
+
+ mod_avail_env = unitFM qual_mod avails
+
+ add_name name_env NotAvailable = returnRn name_env
+ add_name name_env (Avail n ns) = foldlRn add_one name_env (n : ns)
+
+ add_one :: NameEnv -> Name -> RnMG NameEnv
+ add_one env name = add_to_env addOneToNameEnvRn env occ_name name
+ where
+ occ_name = nameOccName name
+
+ add_to_env add_fn env occ thing | qual_imp && unqual_imp = both
+ | qual_imp = qual_only
+ | unqual_imp = unqual_only
+ where
+ unqual_only = add_fn env (Unqual occ) thing
+ qual_only = add_fn env (Qual qual_mod occ) thing
+ both = unqual_only `thenRn` \ env' ->
+ add_fn env' (Qual qual_mod occ) thing
+
+ add_fixity name_env fixity_env (occ_name, (fixity, provenance))
+ | maybeToBool (lookupFM name_env rdr_name) -- It's imported
+ = add_to_env addOneToFixityEnvRn fixity_env occ_name (fixity,provenance)
+ | otherwise -- It ain't imported
+ = returnRn fixity_env
+ where
+ -- rdr_name is a name by which the thing is guaranteed to be known,
+ -- *if it is imported at all*
+ rdr_name | qual_imp = Qual qual_mod occ_name
+ | otherwise = Unqual occ_name
+\end{code}
+unQualify adds an Unqual binding for every existing Qual binding.
-doOrigIEs iface_cache info mod src_loc us []
- = return (emptyBag,emptyBag,emptyBag,emptyBag,emptyBag)
+\begin{code}
+unQualify :: FiniteMap RdrName elt -> FiniteMap RdrName elt
+unQualify fm = addListToFM fm [(Unqual occ, elt) | (Qual _ occ, elt) <- fmToList fm]
+\end{code}
-doOrigIEs iface_cache info mod src_loc us (ie:ies)
- = doOrigIE iface_cache info mod src_loc us1 ie
- >>= \ (vals1, tcs1, errs1, warns1, imps1) ->
- doOrigIEs iface_cache info mod src_loc us2 ies
- >>= \ (vals2, tcs2, errs2, warns2, imps2) ->
- return (vals1 `unionBags` vals2,
- tcs1 `unionBags` tcs2,
- errs1 `unionBags` errs2,
- warns1 `unionBags` warns2,
- imps1 `unionBags` imps2)
- where
- (us1, us2) = splitUniqSupply us
-
-doOrigIE iface_cache info mod src_loc us ie
- = with_decl iface_cache (ie_name ie)
- (\ err -> (emptyBag, emptyBag, emptyBag, unitBag err, emptyBag))
- (\ decl -> case initRn True mod emptyRnEnv us
- (setExtraRn info $
- pushSrcLocRn src_loc $
- getIfaceDeclNames ie decl)
- of
- ((vals, tcs, imps), errs, warns) -> (vals, tcs, imps, errs, warns))
-
-checkOrigIE iface_cache (IEThingAll n, ExportAbs)
- = with_decl iface_cache n
- (\ err -> (unitBag (\ mod locn -> err), emptyBag))
- (\ decl -> case decl of
- TypeSig _ _ _ -> (emptyBag, unitBag (allWhenSynImpSpecWarn n))
- other -> (unitBag (allWhenAbsImpSpecErr n), emptyBag))
-
-checkOrigIE iface_cache (IEThingWith n ns, ExportAbs)
- = return (unitBag (withWhenAbsImpSpecErr n), emptyBag)
-
-checkOrigIE iface_cache (IEThingWith n ns, ExportAll)
- = with_decl iface_cache n
- (\ err -> (unitBag (\ mod locn -> err), emptyBag))
- (\ decl -> case decl of
- NewTypeSig _ con _ _ -> (check_with "constructrs" [con] ns, emptyBag)
- DataSig _ cons _ _ -> (check_with "constructrs" cons ns, emptyBag)
- ClassSig _ ops _ _ -> (check_with "class ops" ops ns, emptyBag))
- where
- check_with str has rdrs
- | sortLt (<) (map getLocalName has) == sortLt (<) (map unqual_str rdrs)
- = emptyBag
- | otherwise
- = unitBag (withImpSpecErr str n has rdrs)
+%************************************************************************
+%* *
+\subsection{Local declarations}
+%* *
+%************************************************************************
-checkOrigIE iface_cache other
- = return (emptyBag, emptyBag)
+\begin{code}
+fixityFromFixDecl :: RdrNameFixityDecl -> RnMG (OccName, (Fixity, Provenance))
-with_decl iface_cache n do_err do_decl
- = cachedDecl iface_cache (isRdrLexCon n) n >>= \ maybe_decl ->
- case maybe_decl of
- Failed err -> return (do_err err)
- Succeeded decl -> return (do_decl decl)
+fixityFromFixDecl (FixityDecl rdr_name fixity loc)
+ = returnRn (rdrNameOcc rdr_name, (fixity, LocalDef (panic "export-flag") loc))
+\end{code}
-getFixityDecl iface_cache rn
- = let
- (mod, str) = moduleNamePair rn
- in
- cachedIface iface_cache mod >>= \ maybe_iface ->
- case maybe_iface of
- Failed err ->
- return (Nothing, unitBag err)
- Succeeded (ParsedIface _ _ _ _ _ _ fixes _ _ _ _) ->
- case lookupFM fixes str of
- Nothing -> return (Nothing, emptyBag)
- Just (InfixL _ i) -> return (Just (InfixL rn i), emptyBag)
- Just (InfixR _ i) -> return (Just (InfixR rn i), emptyBag)
- Just (InfixN _ i) -> return (Just (InfixN rn i), emptyBag)
-
-ie_name (IEVar n) = n
-ie_name (IEThingAbs n) = n
-ie_name (IEThingAll n) = n
-ie_name (IEThingWith n _) = n
-
-unqual_str (Unqual str) = str
-unqual_str q@(Qual _ _) = panic "unqual_str"
-
-adderr_if True err errs = err `consBag` errs
-adderr_if False err errs = errs
-\end{code}
+%************************************************************************
+%* *
+\subsection{Export list processing
+%* *
+%************************************************************************
-*********************************************************
-* *
-\subsection{Actually creating the imported names}
-* *
-*********************************************************
+The @AvailEnv@ type is just used internally in @exportsFromAvail@.
+When exporting we need to combine the availabilities for a particular
+exported thing, and we also need to check for name clashes -- that
+is: two exported things must have different @OccNames@.
\begin{code}
-getIfaceDeclNames :: RdrNameIE -> RdrIfaceDecl
- -> RnM_IInfo s (Bag RnName, -- values
- Bag RnName, -- tycons/classes
- Bag (RnName,ExportFlag)) -- import flags
-
-getIfaceDeclNames ie (ValSig val src_loc _)
- = newImportedName False src_loc Nothing Nothing val `thenRn` \ val_name ->
- returnRn (unitBag (RnName val_name),
- emptyBag,
- unitBag (RnName val_name, ExportAll))
-
-getIfaceDeclNames ie (TypeSig tycon src_loc _)
- = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
- returnRn (emptyBag,
- unitBag (RnSyn tycon_name),
- unitBag (RnSyn tycon_name, ExportAll))
-
-getIfaceDeclNames ie (NewTypeSig tycon con src_loc _)
- = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
- mapRn (newImportedName False src_loc (Just (nameExportFlag tycon_name))
- (Just (nameImportFlag tycon_name)))
- [con] `thenRn` \ con_names ->
- returnRn (if imp_all (imp_flag ie) then
- listToBag (map (\ n -> RnConstr n tycon_name) con_names)
- else
- emptyBag,
- unitBag (RnData tycon_name con_names),
- unitBag (RnData tycon_name con_names, imp_flag ie))
-
-getIfaceDeclNames ie (DataSig tycon cons src_loc _)
- = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
- mapRn (newImportedName False src_loc (Just (nameExportFlag tycon_name))
- (Just (nameImportFlag tycon_name)))
- cons `thenRn` \ con_names ->
- returnRn (if imp_all (imp_flag ie) then
- listToBag (map (\ n -> RnConstr n tycon_name) con_names)
- else
- emptyBag,
- unitBag (RnData tycon_name con_names),
- unitBag (RnData tycon_name con_names, imp_flag ie))
-
-getIfaceDeclNames ie (ClassSig cls ops src_loc _)
- = newImportedName True src_loc Nothing Nothing cls `thenRn` \ cls_name ->
- mapRn (newImportedName False src_loc (Just (nameExportFlag cls_name))
- (Just (nameImportFlag cls_name)))
- ops `thenRn` \ op_names ->
- returnRn (if imp_all (imp_flag ie) then
- listToBag (map (\ n -> RnClassOp n cls_name) op_names)
- else
- emptyBag,
- unitBag (RnClass cls_name op_names),
- unitBag (RnClass cls_name op_names, imp_flag ie))
-
-
-imp_all ExportAll = True
-imp_all _ = False
-
-imp_flag (IEThingAbs _) = ExportAbs
-imp_flag (IEThingAll _) = ExportAll
-imp_flag (IEThingWith _ _) = ExportAll
-\end{code}
+type AvailEnv = FiniteMap OccName (RdrNameIE, AvailInfo)
+ -- The FM maps each OccName to the RdrNameIE that gave rise to it,
+ -- for error reporting, as well as to its AvailInfo
-*********************************************************
-* *
-\subsection{Creating a new imported name}
-* *
-*********************************************************
+emptyAvailEnv = emptyFM
-\begin{code}
-newImportedName :: Bool -- True => tycon or class
- -> SrcLoc
- -> Maybe ExportFlag -- maybe export flag
- -> Maybe ExportFlag -- maybe import flag
- -> RdrName -- orig name
- -> RnM_IInfo s Name
-
-newImportedName tycon_or_class locn maybe_exp maybe_imp rdr
- = getExtraRn `thenRn` \ ((_,b_keys,exp_fn,occ_fn),done_vals,done_tcs,imp_fn) ->
- case if tycon_or_class
- then lookupFM done_tcs (moduleNamePair rdr)
- else lookupFM done_vals (moduleNamePair rdr)
- of
- Just rn -> returnRn (getName rn)
- Nothing ->
- rnGetUnique `thenRn` \ u ->
- let
- uniq = case rdr of
- Qual m n -> u
- Unqual n -> case lookupFM b_keys n of
- Nothing -> u
- Just (key,_) -> key
-
- exp = case maybe_exp of
- Just exp -> exp
- Nothing -> exp_fn n
-
- imp = case maybe_imp of
- Just imp -> imp
- Nothing -> imp_fn n
-
- n = mkImportedName uniq rdr imp locn exp (occ_fn n)
- in
- returnRn n
+unitAvailEnv :: RdrNameIE -> AvailInfo -> AvailEnv
+unitAvailEnv ie NotAvailable
+ = emptyFM
+unitAvailEnv ie avail@(Avail n ns)
+ = unitFM (nameOccName n) (ie,avail)
+
+plusAvailEnv a1 a2
+ = mapRn (addErrRn.availClashErr) (conflictsFM bad_avail a1 a2) `thenRn_`
+ returnRn (plusFM_C plus_avail a1 a2)
+
+listToAvailEnv :: RdrNameIE -> [AvailInfo] -> RnM s d AvailEnv
+listToAvailEnv ie items
+ = foldlRn plusAvailEnv emptyAvailEnv (map (unitAvailEnv ie) items)
+
+bad_avail (ie1,Avail n1 _) (ie2,Avail n2 _) = n1 /= n2 -- Same OccName, different Name
+plus_avail (ie1,a1) (ie2,a2) = (ie1, a1 `plusAvail` a2)
\end{code}
+
\begin{code}
-globalDupNamesErr rdr rns sty
- = ppHang (ppBesides [pprNonSym sty rdr, ppStr " multiply defined:"])
- 4 (ppAboves (map pp_def rns))
+exportsFromAvail :: Module
+ -> Maybe [RdrNameIE] -- Export spec
+ -> ModuleAvails
+ -> RnEnv
+ -> RnMG (Name -> ExportFlag, ExportEnv)
+ -- Complains if two distinct exports have same OccName
+ -- Complains about exports items not in scope
+exportsFromAvail this_mod Nothing all_avails rn_env
+ = exportsFromAvail this_mod (Just [IEModuleContents this_mod]) all_avails rn_env
+
+exportsFromAvail this_mod (Just export_items) all_avails (RnEnv name_env fixity_env)
+ = mapRn exports_from_item export_items `thenRn` \ avail_envs ->
+ foldlRn plusAvailEnv emptyAvailEnv avail_envs `thenRn` \ export_avail_env ->
+ let
+ export_avails = map snd (eltsFM export_avail_env)
+ export_fixities = mk_exported_fixities (availsToNameSet export_avails)
+ export_fn = mk_export_fn export_avails
+ in
+ returnRn (export_fn, ExportEnv export_avails export_fixities)
+
+ where
+ full_avail_env :: UniqFM AvailInfo
+ full_avail_env = addListToUFM_C plusAvail emptyUFM
+ [(name,avail) | avail@(Avail name _) <- concat (eltsFM all_avails)]
+ -- NB: full_avail_env won't contain bindings for data constructors and class ops,
+ -- which is right and proper; attempts to export them on their own will provoke an error
+
+ exports_from_item :: RdrNameIE -> RnMG AvailEnv
+ exports_from_item ie@(IEModuleContents mod)
+ = case lookupFM all_avails mod of
+ Nothing -> failWithRn emptyAvailEnv (modExportErr mod)
+ Just avails -> addOccurrenceNames Compulsory [n | Avail n _ <- avails] `thenRn_`
+ listToAvailEnv ie avails
+
+ exports_from_item ie
+ | not (maybeToBool maybe_in_scope)
+ = failWithRn emptyAvailEnv (unknownNameErr (ieName ie))
+
+#ifdef DEBUG
+ -- I can't see why this should ever happen; if the thing is in scope
+ -- at all it ought to have some availability
+ | not (maybeToBool maybe_avail)
+ = pprTrace "exportsFromAvail: curious Nothing:" (ppr PprDebug name)
+ returnRn emptyAvailEnv
+#endif
+
+ | not enough_avail
+ = failWithRn emptyAvailEnv (exportItemErr ie export_avail)
+
+ | otherwise -- Phew! It's OK!
+ = addOccurrenceName Compulsory name `thenRn_`
+ returnRn (unitAvailEnv ie export_avail)
+ where
+ maybe_in_scope = lookupNameEnv name_env (ieName ie)
+ Just name = maybe_in_scope
+ maybe_avail = lookupUFM full_avail_env name
+ Just avail = maybe_avail
+ export_avail = filterAvail ie avail
+ enough_avail = case export_avail of {NotAvailable -> False; other -> True}
+
+ -- We export a fixity iff we export a thing with the same (qualified) RdrName
+ mk_exported_fixities :: NameSet -> [(OccName, (Fixity, Provenance))]
+ mk_exported_fixities exports
+ = fmToList (foldr (perhaps_add_fixity exports)
+ emptyFM
+ (fmToList fixity_env))
+
+ perhaps_add_fixity :: NameSet -> (RdrName, (Fixity, Provenance))
+ -> FiniteMap OccName (Fixity,Provenance)
+ -> FiniteMap OccName (Fixity,Provenance)
+ perhaps_add_fixity exports (rdr_name, (fixity, prov)) fix_env
+ = let
+ do_nothing = fix_env -- The default is to pass on the env unchanged
+ in
+ -- Step 1: check whether the rdr_name is in scope; if so find its Name
+ case lookupFM name_env rdr_name of {
+ Nothing -> do_nothing;
+ Just fixity_name ->
+
+ -- Step 2: check whether the fixity thing is exported
+ if not (fixity_name `elemNameSet` exports) then
+ do_nothing
+ else
+
+ -- Step 3: check whether we already have a fixity for the
+ -- Name's OccName in the fix_env we are building up. This can easily
+ -- happen. the original fixity_env might contain bindings for
+ -- M.a and N.a, if a was imported via M and N.
+ -- If this does happen, we expect the fixity to be the same either way.
+ let
+ occ_name = rdrNameOcc rdr_name
+ in
+ case lookupFM fix_env occ_name of {
+ Just (fixity1, prov1) -> -- Got it already
+ ASSERT( fixity == fixity1 )
+ do_nothing;
+ Nothing ->
+
+ -- Step 3: add it to the outgoing fix_env
+ addToFM fix_env occ_name (fixity,prov)
+ }}
+
+mk_export_fn :: [AvailInfo] -> (Name -> ExportFlag)
+mk_export_fn avails
+ = \name -> if name `elemNameSet` exported_names
+ then Exported
+ else NotExported
where
- pp_def rn = addShortErrLocLine (getSrcLoc rn) (\ sty -> ppr sty rn) sty
+ exported_names :: NameSet
+ exported_names = availsToNameSet avails
+\end{code}
-dupImportWarn dup_imps sty
- = ppStr "dupImportWarn"
-qualPreludeImportWarn imp sty
- = ppStr "qualPreludeImportWarn"
+%************************************************************************
+%* *
+\subsection{Errors}
+%* *
+%************************************************************************
-unknownImpSpecErr ie imp_mod locn sty
- = ppStr "unknownImpSpecErr"
+\begin{code}
+ieOcc ie = rdrNameOcc (ieName ie)
-duplicateImpSpecErr ie imp_mod locn sty
- = ppStr "duplicateImpSpecErr"
+badImportItemErr mod ie sty
+ = ppSep [ppStr "Module", pprModule sty mod, ppStr "does not export", ppr sty ie]
-allWhenSynImpSpecWarn n imp_mod locn sty
- = ppStr "allWhenSynImpSpecWarn"
+modExportErr mod sty
+ = ppCat [ ppStr "Unknown module in export list: module", ppPStr mod]
-allWhenAbsImpSpecErr n imp_mod locn sty
- = ppStr "allWhenAbsImpSpecErr"
+exportItemErr export_item NotAvailable sty
+ = ppSep [ ppStr "Export item not in scope:", ppr sty export_item ]
-withWhenAbsImpSpecErr n imp_mod locn sty
- = ppStr "withWhenAbsImpSpecErr"
+exportItemErr export_item avail sty
+ = ppHang (ppStr "Export item not fully in scope:")
+ 4 (ppAboves [ppCat [ppStr "Wanted: ", ppr sty export_item],
+ ppCat [ppStr "Available: ", ppr sty (ieOcc export_item), pprAvail sty avail]])
-withImpSpecErr str n has ns imp_mod locn sty
- = ppStr "withImpSpecErr"
+availClashErr (occ_name, ((ie1,avail1), (ie2,avail2))) sty
+ = ppHang (ppCat [ppStr "Conflicting exports for local name: ", ppr sty occ_name])
+ 4 (ppAboves [ppr sty ie1, ppr sty ie2])
\end{code}
+
projects / ghc-hetmet.git / blobdiff