\begin{code}
module RnNames (
- getGlobalNames
+ getGlobalNames, exportsFromAvail
) where
#include "HsVersions.h"
import CmdLineOpts ( DynFlag(..) )
import HsSyn ( HsModule(..), HsDecl(..), IE(..), ieName, ImportDecl(..),
- ForeignDecl(..), ForKind(..), isDynamicExtName,
- collectTopBinders
+ ForeignDecl(..),
+ collectLocatedHsBinders
)
import RdrHsSyn ( RdrNameIE, RdrNameImportDecl,
RdrNameHsModule, RdrNameHsDecl
)
-import RnIfaces ( getInterfaceExports, recordLocalSlurps )
-import RnHiFiles ( getTyClDeclBinders )
+import RnIfaces ( recordLocalSlurps )
+import RnHiFiles ( getTyClDeclBinders, loadInterface )
import RnEnv
import RnMonad
import FiniteMap
import PrelNames ( pRELUDE_Name, mAIN_Name, main_RDR_Unqual, isUnboundName )
-import UniqFM ( lookupUFM )
-import Bag ( bagToList )
import Module ( ModuleName, moduleName, WhereFrom(..) )
+import Name ( Name, nameSrcLoc, nameOccName )
import NameSet
-import Name ( Name, nameSrcLoc,
- setLocalNameSort, nameOccName, nameEnvElts )
+import NameEnv
import HscTypes ( Provenance(..), ImportReason(..), GlobalRdrEnv,
- GenAvailInfo(..), AvailInfo, Avails, AvailEnv )
-import RdrName ( RdrName, rdrNameOcc, setRdrNameOcc, mkRdrQual, mkRdrUnqual )
+ GenAvailInfo(..), AvailInfo, Avails, AvailEnv,
+ Deprecations(..), ModIface(..)
+ )
+import RdrName ( rdrNameOcc, setRdrNameOcc )
import OccName ( setOccNameSpace, dataName )
import NameSet ( elemNameSet, emptyNameSet )
import Outputable
import Maybes ( maybeToBool, catMaybes, mapMaybe )
-import UniqFM ( emptyUFM, listToUFM )
import ListSetOps ( removeDups )
import Util ( sortLt )
import List ( partition )
getGlobalNames :: Module -> RdrNameHsModule
-> RnMG (GlobalRdrEnv, -- Maps all in-scope things
GlobalRdrEnv, -- Maps just *local* things
- Avails, -- The exported stuff
- AvailEnv) -- Maps a name to its parent AvailInfo
- -- Just for in-scope things only
-
-getGlobalNames this_mod (HsModule _ _ exports imports decls _ mod_loc)
- = -- These two fix-loops are to get the right
- -- provenance information into a Name
- fixRn ( \ ~(rec_gbl_env, _, rec_export_avails, _) ->
-
- let
- rec_exp_fn :: Name -> Bool
- rec_exp_fn = mk_export_fn (availsToNameSet rec_export_avails)
- in
+ ExportAvails) -- The exported stuff
- -- PROCESS LOCAL DECLS
+getGlobalNames this_mod (HsModule _ _ _ imports decls _ mod_loc)
+ = -- 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 decls `thenRn` \ (local_gbl_env, local_mod_avails) ->
-- PROCESS IMPORT DECLS
-- Do the non {- SOURCE -} ones first, so that we get a helpful
all_avails :: ExportAvails
all_avails = foldr plusExportAvails local_mod_avails (imp_avails_s2 ++ imp_avails_s1)
-
- (_, global_avail_env) = all_avails
in
- -- PROCESS EXPORT LIST (but not if we've had errors already)
- checkErrsRn `thenRn` \ no_errs_so_far ->
- (if no_errs_so_far then
- exportsFromAvail this_mod_name exports all_avails gbl_env
- else
- returnRn []
- ) `thenRn` \ export_avails ->
-
-- ALL DONE
- returnRn (gbl_env, local_gbl_env, export_avails, global_avail_env)
- )
+ returnRn (gbl_env, local_gbl_env, all_avails)
where
this_mod_name = moduleName this_mod
importsFromImportDecl this_mod_name (ImportDecl imp_mod_name from qual_only as_mod import_spec iloc)
= pushSrcLocRn iloc $
- getInterfaceExports imp_mod_name from `thenRn` \ (imp_mod, avails_by_module) ->
-
- if null avails_by_module 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_name)
- else
+ loadInterface (ppr imp_mod_name <+> ptext SLIT("is directly imported"))
+ imp_mod_name from `thenRn` \ iface ->
let
+ imp_mod = mi_module iface
+ avails_by_module = mi_exports iface
+ deprecs = mi_deprecs iface
+
avails :: Avails
avails = [ avail | (mod_name, avails) <- avails_by_module,
mod_name /= this_mod_name,
-- then you'll get a 'B does not export AType' message. Oh well.
in
+ if null avails_by_module then
+ -- If there's an error in loadInterface, (e.g. interface
+ -- file not found) we get lots of spurious errors from 'filterImports'
+ returnRn (emptyRdrEnv, mkEmptyExportAvails imp_mod_name)
+ else
+
+ -- Complain if we import a deprecated module
+ ifOptRn Opt_WarnDeprecations (
+ case deprecs of
+ DeprecAll txt -> addWarnRn (moduleDeprec imp_mod_name txt)
+ other -> returnRn ()
+ ) `thenRn_`
+
+ -- Filter the imports according to the import list
filterImports imp_mod_name from import_spec avails `thenRn` \ (filtered_avails, hides, explicits) ->
let
- mk_provenance name = NonLocalDef (UserImport imp_mod iloc (name `elemNameSet` explicits))
+ unqual_imp = not qual_only -- Maybe want unqualified names
+ qual_mod = case as_mod of
+ Nothing -> imp_mod_name
+ Just another_name -> another_name
+
+ mk_prov name = NonLocalDef (UserImport imp_mod iloc (name `elemNameSet` explicits))
+ gbl_env = mkGlobalRdrEnv qual_mod unqual_imp mk_prov filtered_avails hides deprecs
+ exports = mkExportAvails qual_mod unqual_imp gbl_env filtered_avails
in
-
- qualifyImports imp_mod_name
- (not qual_only) -- Maybe want unqualified names
- as_mod hides
- mk_provenance
- filtered_avails
+ returnRn (gbl_env, exports)
\end{code}
\begin{code}
-importsFromLocalDecls this_mod rec_exp_fn decls
- = mapRn (getLocalDeclBinders this_mod rec_exp_fn) decls `thenRn` \ avails_s ->
-
+importsFromLocalDecls this_mod decls
+ = mapRn (getLocalDeclBinders this_mod) decls `thenRn` \ avails_s ->
+ -- The avails that are returned don't include the "system" names
let
avails = concat avails_s
(_, dups) = removeDups compare all_names
in
-- Check for duplicate definitions
- mapRn_ (addErrRn . dupDeclErr) dups `thenRn_`
+ -- The complaint will come out as "Multiple declarations of Foo.f" because
+ -- since 'f' is in the env twice, the unQualInScope used by the error-msg
+ -- printer returns False. It seems awkward to fix, unfortunately.
+ mapRn_ (addErrRn . dupDeclErr) dups `thenRn_`
- -- Record that locally-defined things are available
- recordLocalSlurps avails `thenRn_`
- -- Build the environment
- qualifyImports (moduleName this_mod)
- True -- Want unqualified names
- Nothing -- no 'as M'
- [] -- Hide nothing
- (\n -> LocalDef) -- Provenance is local
- avails
+ -- Record that locally-defined things are available
+ recordLocalSlurps (availsToNameSet avails) `thenRn_`
+ let
+ mod_name = moduleName this_mod
+ unqual_imp = True -- Want unqualified names
+ mk_prov n = LocalDef -- Provenance is local
+ hides = [] -- Hide nothing
+
+ gbl_env = mkGlobalRdrEnv mod_name unqual_imp mk_prov avails hides NoDeprecs
+ -- NoDeprecs: don't complain about locally defined names
+ -- For a start, we may be exporting a deprecated thing
+ -- Also we may use a deprecated thing in the defn of another
+ -- deprecated things. We may even use a deprecated thing in
+ -- the defn of a non-deprecated thing, when changing a module's
+ -- interface
+
+ exports = mkExportAvails mod_name unqual_imp gbl_env avails
+ in
+ returnRn (gbl_env, exports)
---------------------------
-getLocalDeclBinders :: Module
- -> (Name -> Bool) -- Whether exported
- -> RdrNameHsDecl -> RnMG Avails
-getLocalDeclBinders mod rec_exp_fn (TyClD tycl_decl)
+getLocalDeclBinders :: Module -> RdrNameHsDecl -> RnMG [AvailInfo]
+getLocalDeclBinders mod (TyClD tycl_decl)
= -- For type and class decls, we generate Global names, with
-- no export indicator. They need to be global because they get
-- permanently bound into the TyCons and Classes. They don't need
-- an export indicator because they are all implicitly exported.
- getTyClDeclBinders mod tycl_decl `thenRn` \ avail ->
- returnRn [avail]
-
-getLocalDeclBinders mod rec_exp_fn (ValD binds)
- = mapRn (newLocalBinder mod rec_exp_fn)
- (bagToList (collectTopBinders binds))
+ getTyClDeclBinders mod tycl_decl `thenRn` \ (avail, sys_names) ->
-getLocalDeclBinders mod rec_exp_fn (ForD (ForeignDecl nm kind _ ext_nm _ loc))
- | binds_haskell_name kind
- = newLocalBinder mod rec_exp_fn (nm, loc) `thenRn` \ avail ->
+ -- Record that the system names are available
+ recordLocalSlurps (mkNameSet sys_names) `thenRn_`
returnRn [avail]
- | otherwise -- a foreign export
- = returnRn []
+getLocalDeclBinders mod (ValD binds)
+ = mapRn new (collectLocatedHsBinders binds) `thenRn` \ avails ->
+ returnRn avails
where
- binds_haskell_name (FoImport _) = True
- binds_haskell_name FoLabel = True
- binds_haskell_name FoExport = isDynamicExtName ext_nm
+ new (rdr_name, loc) = newTopBinder mod rdr_name loc `thenRn` \ name ->
+ returnRn (Avail name)
-getLocalDeclBinders mod rec_exp_fn (FixD _) = returnRn []
-getLocalDeclBinders mod rec_exp_fn (DeprecD _) = returnRn []
-getLocalDeclBinders mod rec_exp_fn (DefD _) = returnRn []
-getLocalDeclBinders mod rec_exp_fn (InstD _) = returnRn []
-getLocalDeclBinders mod rec_exp_fn (RuleD _) = returnRn []
+getLocalDeclBinders mod (ForD (ForeignImport nm _ _ loc))
+ = newTopBinder mod nm loc `thenRn` \ name ->
+ returnRn [Avail name]
+getLocalDeclBinders mod (ForD _)
+ = returnRn []
----------------------------
-newLocalBinder mod rec_exp_fn (rdr_name, loc)
- = -- Generate a local name, and with a suitable export indicator
- newTopBinder mod rdr_name loc `thenRn` \ name ->
- returnRn (Avail (setLocalNameSort name (rec_exp_fn name)))
+getLocalDeclBinders mod (FixD _) = returnRn []
+getLocalDeclBinders mod (DeprecD _) = returnRn []
+getLocalDeclBinders mod (DefD _) = returnRn []
+getLocalDeclBinders mod (InstD _) = returnRn []
+getLocalDeclBinders mod (RuleD _) = returnRn []
\end{code}
-> WhereFrom -- Tells whether it's a {-# SOURCE #-} import
-> 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)
- -- (We need to return both the above sets, because
- -- the qualified version is never hidden; so we can't
- -- implement hiding by reducing what's imported.)
+ -> RnMG ([AvailInfo], -- "chosens"
+ [AvailInfo], -- "hides"
+ -- The true imports are "chosens" - "hides"
+ -- (It's convenient to return both the above sets, because
+ -- the substraction can be done more efficiently when
+ -- building the environment.)
NameSet) -- What was imported explicitly
-- Complains if import spec mentions things that the module doesn't export
bale_out item = addErrRn (badImportItemErr mod from item) `thenRn_`
returnRn []
+ get_item :: RdrNameIE -> RnMG [(AvailInfo, [Name])]
get_item item@(IEModuleContents _) = bale_out item
get_item item@(IEThingAll _)
Just avail@(AvailTC _ [n]) -> -- This occurs when you import T(..), but
-- only export T abstractly. The single [n]
-- in the AvailTC is the type or class itself
- addWarnRn (dodgyImportWarn mod item) `thenRn_`
+ ifOptRn Opt_WarnMisc (addWarnRn (dodgyImportWarn mod item)) `thenRn_`
returnRn [(avail, [availName avail])]
Just avail -> returnRn [(avail, [availName avail])]
get_item item@(IEThingAbs n)
| want_hiding -- hiding( C )
-- Here the 'C' can be a data constructor *or* a type/class
- = case catMaybes [check_item item, check_item (IEThingAbs data_n)] of
+ = case catMaybes [check_item item, check_item (IEVar data_n)] of
[] -> bale_out item
avails -> returnRn [(a, []) | a <- avails]
-- The 'explicits' list is irrelevant when hiding
%* *
%************************************************************************
-@qualifyImports@ takes the @ExportEnv@ after filtering through the import spec
-of an import decl, and deals with producing an @RnEnv@ with the
-right qualified names. It also turns the @Names@ in the @ExportEnv@ into
-fully fledged @Names@.
-
\begin{code}
-qualifyImports :: ModuleName -- Imported module
- -> Bool -- True <=> want unqualified import
- -> Maybe ModuleName -- Optional "as M" part
- -> [AvailInfo] -- What's to be hidden
- -> (Name -> Provenance)
- -> Avails -- Whats imported and how
- -> RnMG (GlobalRdrEnv, ExportAvails)
-
-qualifyImports this_mod unqual_imp as_mod hides mk_provenance avails
- =
- -- Make the name environment. We're talking about a
- -- single module here, so there must be no name clashes.
- -- In practice there only ever will be if it's the module
- -- being compiled.
- let
- -- Add the things that are available
- name_env1 = foldl add_avail emptyRdrEnv avails
-
- -- Delete things that are hidden
- name_env2 = foldl del_avail name_env1 hides
-
- -- Create the export-availability info
- export_avails = mkExportAvails qual_mod unqual_imp name_env2 avails
- in
- returnRn (name_env2, export_avails)
-
- where
- qual_mod = case as_mod of
- Nothing -> this_mod
- Just another_name -> another_name
-
- add_avail :: GlobalRdrEnv -> AvailInfo -> GlobalRdrEnv
- add_avail env avail = foldl add_name env (availNames avail)
-
- add_name env name
- | unqual_imp = env2
- | otherwise = env1
- where
- env1 = addOneToGlobalRdrEnv env (mkRdrQual qual_mod occ) (name,prov)
- env2 = addOneToGlobalRdrEnv env1 (mkRdrUnqual occ) (name,prov)
- occ = nameOccName name
- prov = mk_provenance name
-
- del_avail env avail = foldl delOneFromGlobalRdrEnv env rdr_names
- where
- rdr_names = map (mkRdrUnqual . nameOccName) (availNames avail)
-
-
mkEmptyExportAvails :: ModuleName -> ExportAvails
-mkEmptyExportAvails mod_name = (unitFM mod_name [], emptyUFM)
+mkEmptyExportAvails mod_name = (unitFM mod_name [], emptyNameEnv)
mkExportAvails :: ModuleName -> Bool -> GlobalRdrEnv -> [AvailInfo] -> ExportAvails
-mkExportAvails mod_name unqual_imp name_env avails
+mkExportAvails mod_name unqual_imp gbl_env avails
= (mod_avail_env, entity_avail_env)
where
mod_avail_env = unitFM mod_name unqual_avails
where
uqs = filter unqual_in_scope ns
- unqual_in_scope n = unQualInScope name_env n
+ unqual_in_scope n = unQualInScope gbl_env n
- entity_avail_env = listToUFM [ (name,avail) | avail <- avails,
+ entity_avail_env = mkNameEnv [ (name,avail) | avail <- avails,
name <- availNames avail]
plusExportAvails :: ExportAvails -> ExportAvails -> ExportAvails
= lookupSrcName global_name_env (ieName ie) `thenRn` \ name ->
-- See what's available in the current environment
- case lookupUFM entity_avail_env name of {
+ case lookupNameEnv entity_avail_env name of {
Nothing -> -- Presumably this happens because lookupSrcName didn't find
-- the name and returned an unboundName, which won't be in
-- the entity_avail_env, of course
failWithRn occs (exportClashErr name_occ ie ie')
where
name_occ = nameOccName name
-
-mk_export_fn :: NameSet -> (Name -> Bool) -- True => exported
-mk_export_fn exported_names = \name -> name `elemNameSet` exported_names
\end{code}
%************************************************************************
= hsep [ptext SLIT("Duplicate"),
quotes (ptext SLIT("Module") <+> ppr mod),
ptext SLIT("in export list")]
+
+moduleDeprec mod txt
+ = sep [ ptext SLIT("Module") <+> quotes (ppr mod) <+> ptext SLIT("is deprecated:"),
+ nest 4 (ppr txt) ]
\end{code}
projects / ghc-hetmet.git / blobdiff