X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnNames.lhs;h=921cf614f4b6799b71a0e8ae381e2337af5c86b7;hb=30cf375e0bc79a6b71074a5e0fd2ec393241a751;hp=0f7037269dd1c1b7ffd5e050f3ce977ca432e677;hpb=5cf27e8f1731c52fe63a5b9615f927484164c61b;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnNames.lhs b/ghc/compiler/rename/RnNames.lhs index 0f70372..921cf61 100644 --- a/ghc/compiler/rename/RnNames.lhs +++ b/ghc/compiler/rename/RnNames.lhs @@ -22,7 +22,7 @@ import RnHsSyn import RnMonad import RnIfaces ( IfaceCache(..), cachedIface, cachedDecl ) import RnUtils ( RnEnv(..), emptyRnEnv, extendGlobalRnEnv, - lubExportFlag, qualNameErr, dupNamesErr, negateNameWarn + lubExportFlag, qualNameErr, dupNamesErr ) import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst ) @@ -40,7 +40,7 @@ import Name ( RdrName(..), Name, isQual, mkTopLevName, origName, pprNonSym, isLexCon, isRdrLexCon, ExportFlag(..) ) import PrelInfo ( BuiltinNames(..), BuiltinKeys(..) ) -import PrelMods ( fromPrelude, pRELUDE ) +import PrelMods ( fromPrelude, pRELUDE, rATIO, iX ) import Pretty import SrcLoc ( SrcLoc, mkBuiltinSrcLoc ) import TyCon ( tyConDataCons ) @@ -292,7 +292,6 @@ newGlobalName locn maybe_exp rdr n = mkTopLevName uniq orig locn exp (occ_fn n) -- NB: two "n"s in - addWarnIfRn (rdr == Unqual SLIT("negate")) (negateNameWarn (rdr, locn)) `thenRn_` addErrIfRn (isQual rdr) (qualNameErr "name in definition" (rdr, locn)) `thenRn_` returnRn n \end{code} @@ -348,7 +347,8 @@ doImportDecls iface_cache g_info us src_imps ) >>= \ (vals, tcs, unquals, fixes, errs, warns, _) -> return (vals, tcs, imp_mods, unquals, fixes, - errs, imp_warns `unionBags` warns) + imp_errs `unionBags` errs, + imp_warns `unionBags` warns) where the_imps = implicit_prel ++ src_imps all_imps = implicit_qprel ++ the_imps @@ -364,21 +364,35 @@ doImportDecls iface_cache g_info us src_imps then [{- no "import Prelude" -}] else [ImportDecl pRELUDE False Nothing Nothing prel_loc] - prel_imps -- WDP: Just guessing on this defn... ToDo - = [ imp | imp@(ImportDecl mod _ _ _ _) <- the_imps, fromPrelude mod ] - prel_loc = mkBuiltinSrcLoc (uniq_imps, imp_dups) = removeDups cmp_mod the_imps cmp_mod (ImportDecl m1 _ _ _ _) (ImportDecl m2 _ _ _ _) = cmpPString m1 m2 - qprel_imps = [ imp | imp@(ImportDecl mod True Nothing _ _) <- prel_imps ] + qprel_imps = [ imp | imp@(ImportDecl mod True Nothing _ _) <- src_imps, + fromPrelude mod ] + + qual_mods = [ (qual_name mod as_mod, imp) | imp@(ImportDecl mod True as_mod _ _) <- src_imps ] + qual_name mod (Just as_mod) = as_mod + qual_name mod Nothing = mod + + (_, qual_dups) = removeDups cmp_qual qual_mods + bad_qual_dups = filter (not . all_same_mod) qual_dups + + cmp_qual (q1,_) (q2,_) = cmpPString q1 q2 + all_same_mod ((q,ImportDecl mod _ _ _ _):rest) + = all has_same_mod rest + where + has_same_mod (q,ImportDecl mod2 _ _ _ _) = mod == mod2 + imp_mods = [ mod | ImportDecl mod _ _ _ _ <- uniq_imps ] + imp_warns = listToBag (map dupImportWarn imp_dups) `unionBags` listToBag (map qualPreludeImportWarn qprel_imps) + imp_errs = listToBag (map dupQualImportErr bad_qual_dups) doImports iface_cache i_info us [] = return (emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag) @@ -468,7 +482,7 @@ doImport iface_cache info us (ImportDecl mod qual maybe_as maybe_spec src_loc) getBuiltins _ mod maybe_spec - | not (fromPrelude mod) + | not ((fromPrelude mod) || mod == iX || mod == rATIO ) = (emptyBag, emptyBag, maybe_spec) getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec @@ -476,6 +490,7 @@ getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec Nothing -> (all_vals, all_tcs, Nothing) Just (True, ies) -> -- hiding does not work for builtin names + trace "getBuiltins: import Prelude hiding ( ... )" $ (all_vals, all_tcs, maybe_spec) Just (False, ies) -> let @@ -486,15 +501,20 @@ getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec all_vals = do_all_builtin (fmToList b_val_names) all_tcs = do_all_builtin (fmToList b_tc_names) + filter_mod = if fromPrelude mod then pRELUDE else mod + do_all_builtin [] = emptyBag - do_all_builtin ((str,rn):rest) + do_all_builtin (((str,mod),rn):rest) + | mod == filter_mod = (str, rn) `consBag` do_all_builtin rest + | otherwise + = 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... + case (lookupFM b_tc_names (str,mod)) of -- NB: we favour the tycon/class FM... Just rn -> case (ie,rn) of (IEThingAbs _, WiredInTyCon tc) -> (vals, (str, rn) `consBag` tcs, ies_left) @@ -503,10 +523,15 @@ getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec (tyConDataCons tc)) `unionBags` vals, (str,rn) `consBag` tcs, ies_left) + (IEThingWith _ _, WiredInTyCon tc) -- No checking of With... + -> (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 + case (lookupFM b_val_names (str,mod)) of Nothing -> (vals, tcs, ie:ies_left) Just rn -> case (ie,rn) of (IEVar _, WiredInId _) @@ -516,7 +541,7 @@ getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec (vals, tcs, ies_left) = do_builtin ies -getOrigIEs (ParsedIface _ _ _ _ _ _ exps _ _ _ _ _ _) Nothing -- import all +getOrigIEs (ParsedIface _ _ _ _ _ _ exps _ _ _ _ _ _) Nothing -- import all = (map mkAllIE (eltsFM exps), [], emptyBag) getOrigIEs (ParsedIface _ _ _ _ _ _ exps _ _ _ _ _ _) (Just (True, ies)) -- import hiding @@ -807,6 +832,16 @@ qualPreludeImportWarn (ImportDecl m _ _ _ locn) = addShortWarnLocLine locn (\ sty -> ppCat [ppStr "qualified import of prelude module", ppPStr m]) +dupQualImportErr ((q1,ImportDecl _ _ _ _ locn1):dup_quals) sty + = ppAboves (item1 : map dup_item dup_quals) + where + item1 = addShortErrLocLine locn1 (\ sty -> + ppCat [ppStr "multiple imports (from different modules) with same qualified name", ppPStr q1]) sty + + dup_item (q,ImportDecl _ _ _ _ locn) + = addShortErrLocLine locn (\ sty -> + ppCat [ppStr "here was another import with qualified name", ppPStr q]) sty + unknownImpSpecErr ie imp_mod locn = addShortErrLocLine locn (\ sty -> ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " does not export `", ppr sty (ie_name ie), ppStr "'"])