import CmdLineOpts ( opt_SourceUnchanged, opt_NoImplicitPrelude )
import HsSyn ( HsModule(..), HsDecl(..), FixityDecl(..), Fixity, Fake, InPat, IE(..), HsTyVar,
- TyDecl, ClassDecl, InstDecl, DefaultDecl, ImportDecl(..), HsBinds, IfaceSig
+ TyDecl, ClassDecl, InstDecl, DefaultDecl, ImportDecl(..), HsBinds, IfaceSig,
+ collectTopBinders
)
-import HsBinds ( collectTopBinders )
import HsImpExp ( ieName )
import RdrHsSyn ( RdrNameHsDecl(..), RdrName(..), RdrNameIE(..), SYN_IE(RdrNameImportDecl),
SYN_IE(RdrNameHsModule), SYN_IE(RdrNameFixityDecl),
- rdrNameOcc
+ rdrNameOcc, ieOcc
)
import RnHsSyn ( RenamedHsModule(..), RenamedFixityDecl(..) )
-import RnIfaces ( getInterfaceExports, getDeclBinders, checkUpToDate )
+import RnIfaces ( getInterfaceExports, getDeclBinders, checkUpToDate, recordSlurp )
import RnEnv
import RnMonad
import FiniteMap
import Maybes ( maybeToBool, expectJust )
import Name
import Pretty
-import PprStyle ( PprStyle(..) )
-import Util ( panic, pprTrace )
+import Outputable ( Outputable(..), PprStyle(..) )
+import Util ( panic, pprTrace, assertPanic )
\end{code}
\begin{code}
getGlobalNames :: RdrNameHsModule
- -> RnMG (Maybe (ExportEnv, RnEnv, [AvailInfo]))
+ -> RnMG (Maybe (ExportEnv, RnEnv, NameSet))
-- Nothing <=> no need to recompile
+ -- The NameSet is the set of names that are
+ -- either locally defined,
+ -- or explicitly imported
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) ->
+ importsFromLocalDecls rec_exp_fn m `thenRn` \ (local_rn_env, local_mod_avails, local_avails) ->
-- PROCESS IMPORT DECLS
- mapAndUnzipRn importsFromImportDecl all_imports
- `thenRn` \ (imp_rn_envs, imp_avails_s) ->
+ mapAndUnzip3Rn importsFromImportDecl all_imports
+ `thenRn` \ (imp_rn_envs, imp_avails_s, explicit_imports_s) ->
-- CHECK FOR EARLY EXIT
checkEarlyExit this_mod `thenRn` \ early_exit ->
else
-- COMBINE RESULTS
- -- We put the local env first, so that a local provenance
+ -- We put the local env second, 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 ->
+ plusRnEnv imp_rn_env local_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)
+ export_avails :: ExportAvails
+ export_avails = foldr plusExportAvails local_mod_avails imp_avails_s
+
+ explicit_names :: NameSet -- locally defined or explicitly imported
+ explicit_names = foldr add_on emptyNameSet (local_avails : explicit_imports_s)
+ add_on avails names = foldr (unionNameSets . mkNameSet . availNames) names avails
in
-- PROCESS EXPORT LISTS
- exportsFromAvail this_mod exports all_avails rn_env
+ exportsFromAvail this_mod exports export_avails rn_env
`thenRn` \ (export_fn, export_env) ->
- returnRn (export_fn, Just (export_env, rn_env, local_avails))
+ -- RECORD THAT LOCALLY DEFINED THINGS ARE AVAILABLE
+ mapRn (recordSlurp Nothing Compulsory) local_avails `thenRn_`
+
+ returnRn (export_fn, Just (export_env, rn_env, explicit_names))
) `thenRn` \ (_, result) ->
returnRn result
where
| otherwise = [ImportDecl pRELUDE
False {- Not qualified -}
+ False {- Not source imported -}
Nothing {- No "as" -}
Nothing {- No import list -}
mod_loc]
explicit_prelude_import
- = not (null [ () | (ImportDecl mod qual _ _ _) <- imports, mod == pRELUDE ])
+ = not (null [ () | (ImportDecl mod qual _ _ _ _) <- imports, mod == pRELUDE ])
\end{code}
\begin{code}
checkEarlyExit mod
- = if not opt_SourceUnchanged then
- -- Source code changed; look no further
- returnRn False
+ = checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ -- Found errors already, so exit now
+ returnRn True
else
- -- Unchanged source; look further
- -- We check for
- -- (a) errors so far. These can arise if a module imports
- -- something that's no longer exported by the imported module
- -- (b) usage information up to date
- checkErrsRn `thenRn` \ no_errs_so_far ->
- checkUpToDate mod `thenRn` \ up_to_date ->
- returnRn (no_errs_so_far && up_to_date)
+ traceRn (text "Considering whether compilation is required...") `thenRn_`
+ (if not opt_SourceUnchanged then
+ -- Source code changed and no errors yet... carry on
+ traceRn (nest 4 (text "source file changed")) `thenRn_`
+ 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 ->
+ traceRn (text "Hence, compilation" <+>
+ text (if up_to_date then "IS NOT" else "IS") <+>
+ text "required") `thenRn_`
+ returnRn up_to_date
\end{code}
\begin{code}
importsFromImportDecl :: RdrNameImportDecl
- -> RnMG (RnEnv, ModuleAvails)
+ -> RnMG (RnEnv, ExportAvails, [AvailInfo])
-importsFromImportDecl (ImportDecl mod qual_only as_mod import_spec loc)
+importsFromImportDecl (ImportDecl mod qual_only as_source as_mod import_spec loc)
= pushSrcLocRn loc $
- getInterfaceExports mod `thenRn` \ (avails, fixities) ->
- filterImports mod import_spec avails `thenRn` \ filtered_avails ->
+ getInterfaceExports mod as_source `thenRn` \ (avails, fixities) ->
+ filterImports mod import_spec avails `thenRn` \ (filtered_avails, hides, explicits) ->
let
- filtered_avails' = [ Avail (set_name_prov n) (map set_name_prov ns)
- | Avail n ns <- filtered_avails
- ]
- fixities' = [ (occ,fixity,provenance) | (occ,fixity) <- fixities ]
+ filtered_avails' = map set_avail_prov filtered_avails
+ fixities' = [ (occ,(fixity,provenance)) | (occ,fixity) <- fixities ]
in
qualifyImports mod
True -- Want qualified names
(not qual_only) -- Maybe want unqualified names
as_mod
(ExportEnv filtered_avails' fixities')
+ hides
+ `thenRn` \ (rn_env, mod_avails) ->
+ returnRn (rn_env, mod_avails, explicits)
where
+ set_avail_prov NotAvailable = NotAvailable
+ set_avail_prov (Avail n) = Avail (set_name_prov n)
+ set_avail_prov (AvailTC n ns) = AvailTC (set_name_prov n) (map set_name_prov ns)
set_name_prov name = setNameProvenance name provenance
provenance = Imported mod loc
\end{code}
True -- Want unqualified names
Nothing -- No "as M" part
(ExportEnv avails fixities)
+ [] -- Hide nothing
+ `thenRn` \ (rn_env, mod_avails) ->
+ returnRn (rn_env, mod_avails, avails)
where
newLocalName rdr_name loc
= newLocallyDefinedGlobalName mod (rdrNameOcc rdr_name) rec_exp_fn loc
getLocalDeclBinders avails decl
= getDeclBinders newLocalName decl `thenRn` \ avail ->
- returnRn (avail : avails)
+ case avail of
+ NotAvailable -> returnRn avails -- Instance decls and suchlike
+ other -> returnRn (avail : avails)
do_one (rdr_name, loc)
= newLocalName rdr_name loc `thenRn` \ name ->
- returnRn (Avail name [])
+ returnRn (Avail name)
\end{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
+ -> RnMG ([AvailInfo], -- What's actually imported
+ [AvailInfo], -- What's to be hidden (the unqualified version, that is)
+ [AvailInfo]) -- What was imported explicitly
+
+ -- Complains if import spec mentions things that the module doesn't export
filterImports mod Nothing imports
- = returnRn imports
+ = returnRn (imports, [], [])
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_`
-
- -- Return filtered environment; no need to filter fixities
- returnRn (map new_avail avails)
+ = mapRn check_item import_items `thenRn` \ item_avails ->
+ if want_hiding
+ then
+ returnRn (avails, item_avails, []) -- All imported; item_avails to be hidden
+ else
+ returnRn (item_avails, [], item_avails) -- Just item_avails imported; nothing to be hidden
where
- 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
+ import_fm :: FiniteMap OccName AvailInfo
+ import_fm = listToFM [ (nameOccName name, avail)
+ | avail <- avails,
+ name <- availEntityNames avail]
+
+ check_item item@(IEModuleContents _)
+ = addErrRn (badImportItemErr mod item) `thenRn_`
+ returnRn NotAvailable
+
+ check_item item
+ | not (maybeToBool maybe_in_import_avails) ||
+ (case filtered_avail of { NotAvailable -> True; other -> False })
+ = addErrRn (badImportItemErr mod item) `thenRn_`
+ returnRn NotAvailable
+
+ | otherwise = returnRn filtered_avail
+
+ where
+ maybe_in_import_avails = lookupFM import_fm (ieOcc item)
+ Just avail = maybe_in_import_avails
+ filtered_avail = filterAvail item avail
\end{code}
@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
+right qualified names. It also turns the @Names@ in the @ExportEnv@ into
fully fledged @Names@.
\begin{code}
-> Bool -- True <=> want unqualified import
-> Maybe Module -- Optional "as M" part
-> ExportEnv -- What's imported
- -> RnMG (RnEnv, ModuleAvails)
+ -> [AvailInfo] -- What's to be hidden
+ -> RnMG (RnEnv, ExportAvails)
+
+qualifyImports this_mod qual_imp unqual_imp as_mod (ExportEnv avails fixities) hides
+ =
+ -- Make the name environment. Even though we're talking about a
+ -- single import module there might still be name clashes,
+ -- because it might be the module being compiled.
+ foldlRn add_avail emptyNameEnv avails `thenRn` \ name_env1 ->
+ let
+ -- Delete things that are hidden
+ name_env2 = foldl del_avail name_env1 hides
+
+ -- Create the fixity env
+ fixity_env = foldl (add_fixity name_env2) emptyFixityEnv fixities
-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)
+ -- Create the export-availability info
+ export_avails = mkExportAvails unqual_imp qual_mod avails
+ in
+ returnRn (RnEnv name_env2 fixity_env, export_avails)
where
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_avail env avail = foldlRn add_name env (availNames avail)
+ add_name env name = add qual_imp env (Qual qual_mod occ) `thenRn` \ env1 ->
+ add unqual_imp env1 (Unqual occ)
+ where
+ add False env rdr_name = returnRn env
+ add True env rdr_name = addOneToNameEnv env rdr_name name
+ occ = nameOccName name
+
+ del_avail env avail = foldl delOneFromNameEnv env rdr_names
+ where
+ rdr_names = map (Unqual . nameOccName) (availNames avail)
- 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
+ add_fixity name_env fix_env (occ_name, (fixity, provenance))
+ = add qual $ add unqual $ fix_env
+ where
+ qual = Qual qual_mod occ_name
+ unqual = Unqual occ_name
+
+ add rdr_name fix_env | maybeToBool (lookupFM name_env rdr_name)
+ = addOneToFixityEnv fix_env rdr_name (fixity,provenance)
+ | otherwise
+ = fix_env
\end{code}
unQualify adds an Unqual binding for every existing Qual binding.
\begin{code}
-fixityFromFixDecl :: RdrNameFixityDecl -> RnMG (OccName, Fixity, Provenance)
+fixityFromFixDecl :: RdrNameFixityDecl -> RnMG (OccName, (Fixity, Provenance))
fixityFromFixDecl (FixityDecl rdr_name fixity loc)
- = returnRn (rdrNameOcc rdr_name, fixity, LocalDef (panic "export-flag") loc)
+ = returnRn (rdrNameOcc rdr_name, (fixity, LocalDef (panic "export-flag") loc))
\end{code}
emptyAvailEnv = emptyFM
unitAvailEnv :: RdrNameIE -> AvailInfo -> AvailEnv
-unitAvailEnv ie NotAvailable
- = emptyFM
-unitAvailEnv ie avail@(Avail n ns)
- = unitFM (nameOccName n) (ie,avail)
+unitAvailEnv ie NotAvailable = emptyFM
+unitAvailEnv ie (AvailTC _ []) = emptyFM
+unitAvailEnv ie avail = unitFM (nameOccName (availName avail)) (ie,avail)
plusAvailEnv a1 a2
= mapRn (addErrRn.availClashErr) (conflictsFM bad_avail a1 a2) `thenRn_`
listToAvailEnv ie items
= foldlRn plusAvailEnv emptyAvailEnv (map (unitAvailEnv ie) items)
-bad_avail (ie1,Avail n1 _) (ie2,Avail n2 _) = n1 /= n2 -- Same OccName, different Name
+bad_avail (ie1,avail1) (ie2,avail2) = availName avail1 /= availName avail2 -- Same OccName, different Name
plus_avail (ie1,a1) (ie2,a2) = (ie1, a1 `plusAvail` a2)
\end{code}
+Processing the export list.
+
+You might think that we should record things that appear in the export list as
+``occurrences'' (using addOccurrenceName), but you'd be wrong. We do check (here)
+that they are in scope, but there is no need to slurp in their actual declaration
+(which is what addOccurrenceName forces). Indeed, doing so would big trouble when
+compiling PrelBase, because it re-exports GHC, which includes takeMVar#, whose type
+includes ConcBase.StateAndSynchVar#, and so on...
\begin{code}
exportsFromAvail :: Module
-> Maybe [RdrNameIE] -- Export spec
- -> ModuleAvails
+ -> ExportAvails
-> 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 Nothing export_avails rn_env
+ = exportsFromAvail this_mod (Just [IEModuleContents this_mod]) export_avails rn_env
-exportsFromAvail this_mod (Just export_items) all_avails (RnEnv name_env fixity_env)
+exportsFromAvail this_mod (Just export_items)
+ (mod_avail_env, entity_avail_env)
+ (RnEnv name_env fixity_env)
= mapRn exports_from_item export_items `thenRn` \ avail_envs ->
foldlRn plusAvailEnv emptyAvailEnv avail_envs `thenRn` \ export_avail_env ->
let
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
+ = case lookupFM mod_avail_env mod of
Nothing -> failWithRn emptyAvailEnv (modExportErr mod)
- Just avails -> addOccurrenceNames Compulsory [n | Avail n _ <- avails] `thenRn_`
- listToAvailEnv ie avails
+ Just avails -> listToAvailEnv ie avails
exports_from_item ie
| not (maybeToBool maybe_in_scope)
= failWithRn emptyAvailEnv (exportItemErr ie export_avail)
| otherwise -- Phew! It's OK!
- = addOccurrenceName Compulsory name `thenRn_`
- returnRn (unitAvailEnv ie export_avail)
+ = 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
+ maybe_avail = lookupUFM entity_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 :: NameSet -> [(OccName, (Fixity, Provenance))]
mk_exported_fixities exports
- = [ (rdrNameOcc rdr_name, fixity, prov)
- | (rdr_name, (fixity, prov)) <- fmToList fixity_env,
- export_fixity name_env exports rdr_name
- ]
+ = 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
where
exported_names :: NameSet
exported_names = availsToNameSet avails
-
-export_fixity :: NameEnv -> NameSet -> RdrName -> Bool
-export_fixity name_env exports (Unqual _)
- = False -- The qualified fixity is always there as well
-export_fixity name_env exports rdr_name@(Qual _ occ)
- = case lookupFM name_env rdr_name of
- Just fixity_name -> fixity_name `elemNameSet` exports
- -- Check whether the exported thing is
- -- the one to which the fixity attaches
- other -> False -- Not even in scope
\end{code}
%************************************************************************
\begin{code}
-ieOcc ie = rdrNameOcc (ieName ie)
-
badImportItemErr mod ie sty
- = ppSep [ppStr "Module", pprModule sty mod, ppStr "does not export", ppr sty ie]
+ = sep [ptext SLIT("Module"), pprModule sty mod, ptext SLIT("does not export"), ppr sty ie]
modExportErr mod sty
- = ppCat [ ppStr "Unknown module in export list: module", ppPStr mod]
+ = hsep [ ptext SLIT("Unknown module in export list: module"), ptext mod]
exportItemErr export_item NotAvailable sty
- = ppSep [ ppStr "Export item not in scope:", ppr sty export_item ]
+ = sep [ ptext SLIT("Export item not in scope:"), ppr sty export_item ]
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]])
+ = hang (ptext SLIT("Export item not fully in scope:"))
+ 4 (vcat [hsep [ptext SLIT("Wanted: "), ppr sty export_item],
+ hsep [ptext SLIT("Available:"), ppr sty (ieOcc export_item), pprAvail sty avail]])
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])
+ = hsep [ptext SLIT("The export items"), ppr sty ie1, ptext SLIT("and"), ppr sty ie2,
+ ptext SLIT("create conflicting exports for"), ppr sty occ_name]
\end{code}
projects / ghc-hetmet.git / blobdiff