opt_SourceUnchanged, opt_WarnUnusedBinds
)
-import HsSyn ( HsModule(..), ImportDecl(..), HsDecl(..), TyClDecl(..),
+import HsSyn ( HsModule(..), HsDecl(..), TyClDecl(..),
IE(..), ieName,
ForeignDecl(..), ForKind(..), isDynamic,
- FixitySig(..), Sig(..),
+ FixitySig(..), Sig(..), ImportDecl(..),
collectTopBinders
)
import RdrHsSyn ( RdrNameIE, RdrNameImportDecl,
RdrNameHsModule, RdrNameHsDecl
)
-import RnIfaces ( getInterfaceExports, getDeclBinders, getImportedFixities,
+import RnIfaces ( getInterfaceExports, getDeclBinders, getDeclSysBinders,
recordSlurp, checkUpToDate
)
import RnEnv
import FiniteMap
import PrelMods
+import PrelInfo ( main_RDR )
import UniqFM ( lookupUFM )
import Bag ( bagToList )
import Maybes ( maybeToBool )
-import Module ( pprModule )
+import Module ( ModuleName, mkThisModule, pprModuleName, WhereFrom(..) )
import NameSet
-import Name
-import RdrName ( RdrName, rdrNameOcc, mkRdrQual, mkRdrUnqual )
+import Name ( Name, ExportFlag(..), ImportReason(..), Provenance(..),
+ isLocallyDefined, setNameProvenance,
+ nameOccName, getSrcLoc, pprProvenance, getNameProvenance
+ )
+import RdrName ( RdrName, rdrNameOcc, mkRdrQual, mkRdrUnqual, isQual )
import SrcLoc ( SrcLoc )
import NameSet ( elemNameSet, emptyNameSet )
import Outputable
import Unique ( getUnique )
import Util ( removeDups, equivClassesByUniq, sortLt )
+import List ( partition )
\end{code}
\begin{code}
getGlobalNames :: RdrNameHsModule
-> RnMG (Maybe (ExportEnv,
- RnEnv,
- NameEnv AvailInfo -- Maps a name to its parent AvailInfo
- -- Just for in-scope things only
+ GlobalRdrEnv,
+ FixityEnv, -- Fixities for local decls only
+ NameEnv AvailInfo -- Maps a name to its parent AvailInfo
+ -- Just for in-scope things only
))
-- Nothing => no need to recompile
getGlobalNames (HsModule this_mod _ exports imports decls mod_loc)
= -- These two fix-loops are to get the right
-- provenance information into a Name
- fixRn (\ ~(rec_exported_avails, _) ->
+ fixRn (\ ~(rec_gbl_env, rec_exported_avails, _) ->
- fixRn (\ ~(rec_rn_env, _) ->
let
rec_unqual_fn :: Name -> Bool -- Is this chap in scope unqualified?
- rec_unqual_fn = unQualInScope rec_rn_env
+ rec_unqual_fn = unQualInScope rec_gbl_env
rec_exp_fn :: Name -> ExportFlag
rec_exp_fn = mk_export_fn (availsToNameSet rec_exported_avails)
in
- setOmitQualFn rec_unqual_fn $
setModuleRn this_mod $
-- PROCESS LOCAL DECLS
-- Do these *first* so that the correct provenance gets
-- into the global name cache.
- importsFromLocalDecls this_mod rec_exp_fn decls `thenRn` \ (local_gbl_env, local_mod_avails) ->
+ importsFromLocalDecls this_mod rec_exp_fn decls
+ `thenRn` \ (local_gbl_env, local_mod_avails) ->
-- PROCESS IMPORT DECLS
- mapAndUnzipRn importsFromImportDecl all_imports `thenRn` \ (imp_gbl_envs, imp_avails_s) ->
+ -- Do the non {- SOURCE -} ones first, so that we get a helpful
+ -- warning for {- SOURCE -} ones that are unnecessary
+ let
+ (source, ordinary) = partition is_source_import all_imports
+ is_source_import (ImportDecl _ ImportByUserSource _ _ _ _) = True
+ is_source_import other = False
+ in
+ mapAndUnzipRn (importsFromImportDecl rec_unqual_fn) ordinary
+ `thenRn` \ (imp_gbl_envs1, imp_avails_s1) ->
+ mapAndUnzipRn (importsFromImportDecl rec_unqual_fn) source
+ `thenRn` \ (imp_gbl_envs2, imp_avails_s2) ->
-- COMBINE RESULTS
-- We put the local env second, so that a local provenance
-- "wins", even if a module imports itself.
let
gbl_env :: GlobalRdrEnv
- imp_gbl_env = foldr plusGlobalRdrEnv emptyRdrEnv imp_gbl_envs
+ imp_gbl_env = foldr plusGlobalRdrEnv emptyRdrEnv (imp_gbl_envs2 ++ imp_gbl_envs1)
gbl_env = imp_gbl_env `plusGlobalRdrEnv` local_gbl_env
all_avails :: ExportAvails
- all_avails = foldr plusExportAvails local_mod_avails imp_avails_s
+ all_avails = foldr plusExportAvails local_mod_avails (imp_avails_s2 ++ imp_avails_s1)
in
- returnRn (gbl_env, all_avails)
- ) `thenRn` \ (gbl_env, all_avails) ->
-- TRY FOR EARLY EXIT
-- We can't go for an early exit before this because we have to check
-- Then I must detect the name clash in A before going for an early
-- exit. The early-exit code checks what's actually needed from B
-- to compile A, and of course that doesn't include B.f. That's
- -- why we wait till after the plusRnEnv stuff to do the early-exit.
+ -- why we wait till after the plusEnv stuff to do the early-exit.
checkEarlyExit this_mod `thenRn` \ up_to_date ->
if up_to_date then
- returnRn (junk_exp_fn, Nothing)
+ returnRn (gbl_env, junk_exp_fn, Nothing)
else
+ -- RECORD BETTER PROVENANCES IN THE CACHE
+ -- The names in the envirnoment have better provenances (e.g. imported on line x)
+ -- than the names in the name cache. We update the latter now, so that we
+ -- we start renaming declarations we'll get the good names
+ -- The isQual is because the qualified name is always in scope
+ updateProvenances (concat [names | (rdr_name, names) <- rdrEnvToList imp_gbl_env,
+ isQual rdr_name]) `thenRn_`
+
-- PROCESS EXPORT LISTS
- exportsFromAvail this_mod exports all_avails gbl_env `thenRn` \ exported_avails ->
+ exportsFromAvail this_mod exports all_avails gbl_env
+ `thenRn` \ exported_avails ->
-- DONE
- returnRn (exported_avails, Just (all_avails, gbl_env))
- ) `thenRn` \ (exported_avails, maybe_stuff) ->
+ returnRn (gbl_env, exported_avails, Just all_avails)
+ ) `thenRn` \ (gbl_env, exported_avails, maybe_stuff) ->
case maybe_stuff of {
Nothing -> returnRn Nothing ;
- Just (all_avails, gbl_env) ->
-
+ Just all_avails ->
-- DEAL WITH FIXITIES
fixitiesFromLocalDecls gbl_env decls `thenRn` \ local_fixity_env ->
- getImportedFixities gbl_env `thenRn` \ imp_fixity_env ->
let
-- Export only those fixities that are for names that are
-- (a) defined in this module
-- (b) exported
exported_fixities :: [(Name,Fixity)]
- exported_fixities = [(name,fixity) | FixitySig name fixity _ <- nameEnvElts local_fixity_env,
- isLocallyDefined name
+ exported_fixities = [(name,fixity)
+ | FixitySig name fixity _ <- nameEnvElts local_fixity_env,
+ isLocallyDefined name
]
-
- fixity_env = imp_fixity_env `plusNameEnv` local_fixity_env
in
- traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts fixity_env))) `thenRn_`
+ traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts local_fixity_env))) `thenRn_`
--- TIDY UP
let
export_env = ExportEnv exported_avails exported_fixities
- rn_env = RnEnv gbl_env fixity_env
(_, global_avail_env) = all_avails
in
- returnRn (Just (export_env, rn_env, global_avail_env))
+ returnRn (Just (export_env, gbl_env, local_fixity_env, global_avail_env))
}
where
junk_exp_fn = error "RnNames:export_fn"
-- 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 ||
+ prel_imports | this_mod == pRELUDE_Name ||
explicit_prelude_import ||
opt_NoImplicitPrelude
= []
- | otherwise = [ImportDecl pRELUDE
- False {- Not qualified -}
- Nothing {- No "as" -}
- Nothing {- No import list -}
- mod_loc]
+ | otherwise = [ImportDecl pRELUDE_Name
+ ImportByUser
+ False {- Not qualified -}
+ Nothing {- No "as" -}
+ Nothing {- No import list -}
+ mod_loc]
explicit_prelude_import
- = not (null [ () | (ImportDecl mod qual _ _ _) <- imports, mod == pRELUDE ])
+ = not (null [ () | (ImportDecl mod _ _ _ _ _) <- imports, mod == pRELUDE_Name ])
\end{code}
\begin{code}
-- Unchanged source, and no errors yet; see if usage info
-- up to date, and exit if so
checkUpToDate mod `thenRn` \ up_to_date ->
- putDocRn (text "Compilation" <+>
- text (if up_to_date then "IS NOT" else "IS") <+>
- text "required") `thenRn_`
+ (if up_to_date
+ then putDocRn (text "Compilation IS NOT required")
+ else returnRn ()) `thenRn_`
returnRn up_to_date
\end{code}
\begin{code}
-importsFromImportDecl :: RdrNameImportDecl
+importsFromImportDecl :: (Name -> Bool) -- OK to omit qualifier
+ -> RdrNameImportDecl
-> RnMG (GlobalRdrEnv,
ExportAvails)
-importsFromImportDecl (ImportDecl imp_mod qual_only as_mod import_spec iloc)
+importsFromImportDecl is_unqual (ImportDecl imp_mod_name from qual_only as_mod import_spec iloc)
= pushSrcLocRn iloc $
- getInterfaceExports imp_mod `thenRn` \ (imp_mod, avails) ->
+ getInterfaceExports imp_mod_name from `thenRn` \ (imp_mod, avails) ->
if null avails then
-- If there's an error in getInterfaceExports, (e.g. interface
-- file not found) we get lots of spurious errors from 'filterImports'
- returnRn (emptyRdrEnv, mkEmptyExportAvails imp_mod)
+ returnRn (emptyRdrEnv, mkEmptyExportAvails imp_mod_name)
else
- filterImports imp_mod import_spec avails `thenRn` \ (filtered_avails, hides, explicits) ->
+ filterImports imp_mod_name import_spec avails
+ `thenRn` \ (filtered_avails, hides, explicits) ->
-- We 'improve' the provenance by setting
-- (a) the import-reason field, so that the Name says how it came into scope
-- (b) the print-unqualified field
-- But don't fiddle with wired-in things or we get in a twist
let
- improve_prov name = setNameImportReason name (UserImport imp_mod iloc (is_explicit name))
+ improve_prov name =
+ setNameProvenance name (NonLocalDef (UserImport imp_mod iloc (is_explicit name))
+ (is_unqual name))
is_explicit name = name `elemNameSet` explicits
in
- qualifyImports imp_mod
+ qualifyImports imp_mod_name
(not qual_only) -- Maybe want unqualified names
as_mod hides
- filtered_avails improve_prov `thenRn` \ (rdr_name_env, mod_avails) ->
+ filtered_avails improve_prov
+ `thenRn` \ (rdr_name_env, mod_avails) ->
returnRn (rdr_name_env, mod_avails)
\end{code}
\begin{code}
-importsFromLocalDecls mod rec_exp_fn decls
+importsFromLocalDecls mod_name rec_exp_fn decls
= mapRn (getLocalDeclBinders newLocalName) decls `thenRn` \ avails_s ->
let
all_names = [name | avail <- avails, name <- availNames avail]
dups :: [[Name]]
- dups = filter non_singleton (equivClassesByUniq getUnique all_names)
- where
- non_singleton (x1:x2:xs) = True
- non_singleton other = False
+ (_, dups) = removeDups compare all_names
in
-- Check for duplicate definitions
- mapRn (addErrRn . dupDeclErr) dups `thenRn_`
+ mapRn_ (addErrRn . dupDeclErr) dups `thenRn_`
-- Record that locally-defined things are available
- mapRn (recordSlurp Nothing Compulsory) avails `thenRn_`
+ mapRn_ (recordSlurp Nothing) avails `thenRn_`
-- Build the environment
- qualifyImports mod
+ qualifyImports mod_name
True -- Want unqualified names
Nothing -- no 'as M'
[] -- Hide nothing
(\n -> n)
where
- newLocalName rdr_name loc = newLocallyDefinedGlobalName mod (rdrNameOcc rdr_name)
- rec_exp_fn loc
+ mod = mkThisModule mod_name
+
+ newLocalName rdr_name loc
+ = (if isQual rdr_name then
+ qualNameErr (text "the binding for" <+> quotes (ppr rdr_name)) (rdr_name,loc)
+ -- There should never be a qualified name in a binding position (except in instance decls)
+ -- The parser doesn't check this because the same parser parses instance decls
+ else
+ returnRn ()) `thenRn_`
+
+ newLocalTopBinder mod (rdrNameOcc rdr_name) rec_exp_fn loc
+
getLocalDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
-> RdrNameHsDecl
do_one (rdr_name, loc) = new_name rdr_name loc `thenRn` \ name ->
returnRn (Avail name)
- -- foreign declarations
-getLocalDeclBinders new_name (ForD (ForeignDecl nm kind _ dyn _ loc))
- | binds_haskell_name kind dyn
- = new_name nm loc `thenRn` \ name ->
- returnRn [Avail name]
-
- | otherwise
- = returnRn []
-
getLocalDeclBinders new_name decl
= getDeclBinders new_name decl `thenRn` \ maybe_avail ->
case maybe_avail of
Nothing -> returnRn [] -- Instance decls and suchlike
- Just avail -> returnRn [avail]
-
-binds_haskell_name (FoImport _) _ = True
-binds_haskell_name FoLabel _ = True
-binds_haskell_name FoExport ext_nm = isDynamic ext_nm
+ Just avail -> getDeclSysBinders new_sys_name decl `thenRn_`
+ returnRn [avail]
+ where
+ -- The getDeclSysBinders is just to get the names of superclass selectors
+ -- etc, into the cache
+ new_sys_name rdr_name loc = newImplicitBinder (rdrNameOcc rdr_name) loc
fixitiesFromLocalDecls :: GlobalRdrEnv -> [RdrNameHsDecl] -> RnMG FixityEnv
fixitiesFromLocalDecls gbl_env decls
getFixities acc (FixD fix)
= fix_decl acc fix
- getFixities acc (TyClD (ClassDecl _ _ _ sigs _ _ _ _ _))
+ getFixities acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ _ _ _))
= foldlRn fix_decl acc [sig | FixSig sig <- sigs]
- -- Get fixities from class decl sigs too
-
+ -- Get fixities from class decl sigs too.
getFixities acc other_decl
= returnRn acc
- fix_decl acc (FixitySig rdr_name fixity loc)
+ fix_decl acc sig@(FixitySig rdr_name fixity loc)
= -- Check for fixity decl for something not declared
case lookupRdrEnv gbl_env rdr_name of {
Nothing | opt_WarnUnusedBinds
- -> pushSrcLocRn loc (addWarnRn (unusedFixityDecl rdr_name fixity)) `thenRn_`
- returnRn acc
+ -> pushSrcLocRn loc (addWarnRn (unusedFixityDecl rdr_name fixity))
+ `thenRn_` returnRn acc
| otherwise -> returnRn acc ;
Just (name:_) ->
-- Check for duplicate fixity decl
case lookupNameEnv acc name of {
- Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc') `thenRn_`
- returnRn acc ;
-
+ Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc')
+ `thenRn_` returnRn acc ;
Nothing -> returnRn (addToNameEnv acc name (FixitySig name fixity loc))
}}
available, and filters it through the import spec (if any).
\begin{code}
-filterImports :: Module -- The module being imported
+filterImports :: ModuleName -- The module being imported
-> Maybe (Bool, [RdrNameIE]) -- Import spec; True => hiding
-> [AvailInfo] -- What's available
-> RnMG ([AvailInfo], -- What's actually imported
- [AvailInfo], -- What's to be hidden (the unqualified version, that is)
+ [AvailInfo], -- What's to be hidden
+ -- (the unqualified version, that is)
NameSet) -- What was imported explicitly
-- Complains if import spec mentions things that the module doesn't export
fully fledged @Names@.
\begin{code}
-qualifyImports :: Module -- Imported module
+qualifyImports :: ModuleName -- Imported module
-> Bool -- True <=> want unqualified import
- -> Maybe Module -- Optional "as M" part
+ -> Maybe ModuleName -- Optional "as M" part
-> [AvailInfo] -- What's to be hidden
-> Avails -- Whats imported and how
-> (Name -> Name) -- Improves the provenance on imported things
%************************************************************************
%* *
-\subsection{Export list processing
+\subsection{Export list processing}
%* *
%************************************************************************
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...
+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}
type ExportAccum -- The type of the accumulating parameter of
-- the main worker function in exportsFromAvail
- = ([Module], -- 'module M's seen so far
+ = ([ModuleName], -- 'module M's seen so far
ExportOccMap, -- Tracks exported occurrence names
NameEnv AvailInfo) -- The accumulated exported stuff, kept in an env
-- so we can common-up related AvailInfos
-- that have the same occurrence name
-exportsFromAvail :: Module
+exportsFromAvail :: ModuleName
-> Maybe [RdrNameIE] -- Export spec
-> ExportAvails
-> GlobalRdrEnv
-- Warns about identical exports.
-- Complains about exports items not in scope
exportsFromAvail this_mod Nothing export_avails global_name_env
- = exportsFromAvail this_mod (Just [IEModuleContents this_mod])
- export_avails global_name_env
+ = exportsFromAvail this_mod true_exports export_avails global_name_env
+ where
+ true_exports = Just $ if this_mod == mAIN_Name
+ then [IEVar main_RDR]
+ -- export Main.main *only* unless otherwise specified,
+ else [IEModuleContents this_mod]
+ -- but for all other modules export everything.
exportsFromAvail this_mod (Just export_items)
(mod_avail_env, entity_avail_env)
| otherwise
= case lookupFM mod_avail_env mod of
Nothing -> failWithRn acc (modExportErr mod)
- Just mod_avails -> foldlRn (check_occs ie) occs mod_avails `thenRn` \ occs' ->
+ Just mod_avails -> foldlRn (check_occs ie) occs mod_avails
+ `thenRn` \ occs' ->
let
avails' = foldl add_avail avails mod_avails
in
Just (name', ie')
| name == name' -> -- Duplicate export
warnCheckRn opt_WarnDuplicateExports
- (dupExportWarn name_occ ie ie') `thenRn_`
- returnRn occs
+ (dupExportWarn name_occ ie ie')
+ `thenRn_` returnRn occs
| otherwise -> -- Same occ name but different names: an error
failWithRn occs (exportClashErr name_occ ie ie')
\begin{code}
badImportItemErr mod ie
- = sep [ptext SLIT("Module"), quotes (pprModule mod),
+ = sep [ptext SLIT("Module"), quotes (pprModuleName mod),
ptext SLIT("does not export"), quotes (ppr ie)]
dodgyImportWarn mod (IEThingAll tc)
- = sep [ptext SLIT("Module") <+> quotes (pprModule mod) <+> ptext SLIT("exports") <+> quotes (ppr tc),
+ = sep [ptext SLIT("Module") <+> quotes (pprModuleName mod)
+ <+> ptext SLIT("exports") <+> quotes (ppr tc),
ptext SLIT("with no constructors/class operations;"),
ptext SLIT("yet it is imported with a (..)")]
modExportErr mod
- = hsep [ ptext SLIT("Unknown module in export list: module"), quotes (pprModule mod)]
+ = hsep [ ptext SLIT("Unknown module in export list: module"), quotes (pprModuleName mod)]
exportItemErr export_item
= sep [ ptext SLIT("Bad export item"), quotes (ppr export_item)]
exportClashErr occ_name ie1 ie2
- = hsep [ptext SLIT("The export items"), quotes (ppr ie1), ptext SLIT("and"), quotes (ppr ie2),
- ptext SLIT("create conflicting exports for"), quotes (ppr occ_name)]
+ = hsep [ptext SLIT("The export items"), quotes (ppr ie1)
+ ,ptext SLIT("and"), quotes (ppr ie2)
+ ,ptext SLIT("create conflicting exports for"), quotes (ppr occ_name)]
dupDeclErr (n:ns)
= vcat [ptext SLIT("Multiple declarations of") <+> quotes (ppr n),
dupModuleExport mod
= hsep [ptext SLIT("Duplicate"),
- quotes (ptext SLIT("Module") <+> pprModule mod),
+ quotes (ptext SLIT("Module") <+> pprModuleName mod),
ptext SLIT("in export list")]
unusedFixityDecl rdr_name fixity
projects / ghc-hetmet.git / blobdiff