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,
- recordSlurp, checkUpToDate, loadHomeInterface
+import RnIfaces ( getInterfaceExports, getDeclBinders,
+ recordSlurp, checkUpToDate
)
import RnEnv
import RnMonad
import FiniteMap
import PrelMods
+import PrelInfo ( main_RDR )
import UniqFM ( lookupUFM )
import Bag ( bagToList )
import Maybes ( maybeToBool )
+import Module ( ModuleName, mkThisModule, pprModuleName, WhereFrom(..) )
import NameSet
-import Name
+import Name ( Name, ExportFlag(..), ImportReason(..),
+ isLocallyDefined, setNameImportReason,
+ nameOccName, getSrcLoc, pprProvenance, getNameProvenance
+ )
import RdrName ( RdrName, rdrNameOcc, mkRdrQual, mkRdrUnqual )
import SrcLoc ( SrcLoc )
import NameSet ( elemNameSet, emptyNameSet )
import Outputable
import Unique ( getUnique )
import Util ( removeDups, equivClassesByUniq, sortLt )
-import List ( nubBy )
+import List ( partition )
\end{code}
\begin{code}
getGlobalNames :: RdrNameHsModule
-> RnMG (Maybe (ExportEnv,
- RnEnv,
+ GlobalRdrEnv,
+ FixityEnv, -- Fixities for local decls only
NameEnv AvailInfo -- Maps a name to its parent AvailInfo
-- Just for in-scope things only
))
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_exp_fn, _) ->
+ fixRn (\ ~(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_exp_fn :: Name -> ExportFlag
+ rec_exp_fn = mk_export_fn (availsToNameSet rec_exported_avails)
in
setOmitQualFn rec_unqual_fn $
setModuleRn this_mod $
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 ordinary `thenRn` \ (imp_gbl_envs1, imp_avails_s1) ->
+ mapAndUnzipRn importsFromImportDecl 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
- export_avails :: ExportAvails
- export_avails = foldr plusExportAvails local_mod_avails imp_avails_s
+ all_avails :: ExportAvails
+ all_avails = foldr plusExportAvails local_mod_avails (imp_avails_s2 ++ imp_avails_s1)
in
- returnRn (gbl_env, export_avails)
- ) `thenRn` \ (gbl_env, export_avails) ->
+ 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)
else
- -- FIXITIES
- fixitiesFromLocalDecls gbl_env decls `thenRn` \ local_fixity_env ->
- getImportedFixities `thenRn` \ imp_fixity_env ->
- let
- fixity_env = imp_fixity_env `plusNameEnv` local_fixity_env
- rn_env = RnEnv gbl_env fixity_env
- (_, global_avail_env) = export_avails
- in
- traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts fixity_env))) `thenRn_`
-
-- PROCESS EXPORT LISTS
- exportsFromAvail this_mod exports export_avails rn_env `thenRn` \ (export_fn, export_env) ->
+ exportsFromAvail this_mod exports all_avails gbl_env `thenRn` \ exported_avails ->
-- DONE
- returnRn (export_fn, Just (export_env, rn_env, global_avail_env))
- ) `thenRn` \ (_, result) ->
- returnRn result
+ returnRn (exported_avails, Just (all_avails, gbl_env))
+ ) `thenRn` \ (exported_avails, maybe_stuff) ->
+
+ case maybe_stuff of {
+ Nothing -> returnRn Nothing ;
+ Just (all_avails, gbl_env) ->
+
+
+ -- DEAL WITH FIXITIES
+ fixitiesFromLocalDecls gbl_env decls `thenRn` \ local_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
+ ]
+ in
+ traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts local_fixity_env))) `thenRn_`
+
+ --- TIDY UP
+ let
+ export_env = ExportEnv exported_avails exported_fixities
+ (_, global_avail_env) = all_avails
+ in
+ 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
+ | 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}
-> RnMG (GlobalRdrEnv,
ExportAvails)
-importsFromImportDecl (ImportDecl imp_mod qual_only as_mod import_spec iloc)
+importsFromImportDecl (ImportDecl imp_mod_name from qual_only as_mod import_spec iloc)
= pushSrcLocRn iloc $
- getInterfaceExports imp_mod `thenRn` \ 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) ->
- -- Load all the home modules for the things being
- -- bought into scope. This makes sure their fixities
- -- are loaded before we grab the FixityEnv from Ifaces
- let
- home_modules = [name | avail <- filtered_avails,
- -- Doesn't take account of hiding, but that doesn't matter
-
- let name = availName avail,
- not (isLocallyDefined name || nameModule name == imp_mod)
- -- Don't try to load the module being compiled
- -- (this can happen in mutual-recursion situations)
- -- or from the module being imported (it's already loaded)
- ]
-
- same_module n1 n2 = nameModule n1 == nameModule n2
- load n = loadHomeInterface (doc_str n) n
- doc_str n = ptext SLIT("Need fixities from") <+> ppr (nameModule n) <+> parens (ppr n)
- in
- mapRn load (nubBy same_module home_modules) `thenRn_`
-
-- We 'improve' the provenance by setting
-- (a) the import-reason field, so that the Name says how it came into scope
-- including whether it's explicitly imported
improve_prov name = setNameImportReason name (UserImport imp_mod iloc (is_explicit 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) ->
\begin{code}
-importsFromLocalDecls mod rec_exp_fn decls
+importsFromLocalDecls mod_name rec_exp_fn decls
= mapRn (getLocalDeclBinders newLocalName) decls `thenRn` \ avails_s ->
let
non_singleton other = False
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
+ newLocalName rdr_name loc = newLocalTopBinder mod (rdrNameOcc rdr_name)
+ rec_exp_fn loc
+ mod = mkThisModule mod_name
getLocalDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
-> RdrNameHsDecl
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
Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc') `thenRn_`
returnRn acc ;
-
Nothing -> returnRn (addToNameEnv acc name (FixitySig name fixity loc))
}}
\end{code}
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
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
\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
- -> RnEnv
- -> RnMG (Name -> ExportFlag, ExportEnv)
+ -> GlobalRdrEnv
+ -> RnMG Avails
-- Complains if two distinct exports have same OccName
-- Warns about identical exports.
-- Complains about exports items not in scope
-exportsFromAvail this_mod Nothing export_avails rn_env
- = exportsFromAvail this_mod (Just [IEModuleContents this_mod]) export_avails rn_env
+exportsFromAvail this_mod Nothing 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)
- (RnEnv global_name_env fixity_env)
+ global_name_env
= foldlRn exports_from_item
([], emptyFM, emptyNameEnv) export_items `thenRn` \ (_, _, export_avail_map) ->
let
export_avails :: [AvailInfo]
export_avails = nameEnvElts export_avail_map
-
- export_names :: NameSet
- export_names = availsToNameSet export_avails
-
- -- Export only those fixities that are for names that are
- -- (a) defined in this module
- -- (b) exported
- export_fixities :: [(Name,Fixity)]
- export_fixities = [ (name,fixity)
- | FixitySig name fixity _ <- nameEnvElts fixity_env,
- name `elemNameSet` export_names,
- isLocallyDefined name
- ]
-
- export_fn :: Name -> ExportFlag
- export_fn = mk_export_fn export_names
in
- returnRn (export_fn, ExportEnv export_avails export_fixities)
+ returnRn export_avails
where
exports_from_item :: ExportAccum -> RdrNameIE -> RnMG ExportAccum
\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)]
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