\section[RnNames]{Extracting imported and top-level names in scope}
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module RnNames (
rnImports, importsFromLocalDecls,
rnExports,
getLocalDeclBinders, extendRdrEnvRn,
- reportUnusedNames, reportDeprecations
+ reportUnusedNames, finishDeprecations,
) where
#include "HsVersions.h"
-import DynFlags ( DynFlag(..), GhcMode(..), DynFlags(..) )
+import DynFlags
import HsSyn ( IE(..), ieName, ImportDecl(..), LImportDecl,
- ForeignDecl(..), HsGroup(..), HsValBinds(..),
+ ForeignDecl(..), HsGroup(..), HsValBindsLR(..),
Sig(..), collectHsBindLocatedBinders, tyClDeclNames,
instDeclATs, isFamInstDecl,
LIE )
import Module
import Name
import NameEnv
+import LazyUniqFM
import NameSet
import OccName
import HscTypes
import SrcLoc
import FiniteMap
import ErrUtils
-import BasicTypes ( DeprecTxt )
+import BasicTypes ( DeprecTxt, Fixity )
import DriverPhases ( isHsBoot )
import Util
import ListSetOps
import Data.List ( partition, concatMap, (\\), delete )
import IO ( openFile, IOMode(..) )
-import Monad ( when )
+import Monad ( when, mplus )
\end{code}
\begin{code}
rnImports :: [LImportDecl RdrName]
- -> RnM ([LImportDecl Name], GlobalRdrEnv, ImportAvails)
+ -> RnM ([LImportDecl Name], GlobalRdrEnv, ImportAvails,AnyHpcUsage)
rnImports imports
-- PROCESS IMPORT DECLS
(source, ordinary) = partition is_source_import imports
is_source_import (L _ (ImportDecl _ is_boot _ _ _)) = is_boot
+ ifOptM Opt_WarnImplicitPrelude (
+ when (notNull prel_imports) $ addWarn (implicitPreludeWarn)
+ )
+
stuff1 <- mapM (rnImportDecl this_mod) (prel_imports ++ ordinary)
stuff2 <- mapM (rnImportDecl this_mod) source
- let (decls, rdr_env, imp_avails) = combine (stuff1 ++ stuff2)
- return (decls, rdr_env, imp_avails)
+ let (decls, rdr_env, imp_avails,hpc_usage) = combine (stuff1 ++ stuff2)
+ return (decls, rdr_env, imp_avails,hpc_usage)
where
- combine :: [(LImportDecl Name, GlobalRdrEnv, ImportAvails)]
- -> ([LImportDecl Name], GlobalRdrEnv, ImportAvails)
- combine = foldr plus ([], emptyGlobalRdrEnv, emptyImportAvails)
- where plus (decl, gbl_env1, imp_avails1)
- (decls, gbl_env2, imp_avails2)
+ combine :: [(LImportDecl Name, GlobalRdrEnv, ImportAvails,AnyHpcUsage)]
+ -> ([LImportDecl Name], GlobalRdrEnv, ImportAvails,AnyHpcUsage)
+ combine = foldr plus ([], emptyGlobalRdrEnv, emptyImportAvails,False)
+ where plus (decl, gbl_env1, imp_avails1,hpc_usage1)
+ (decls, gbl_env2, imp_avails2,hpc_usage2)
= (decl:decls,
gbl_env1 `plusGlobalRdrEnv` gbl_env2,
- imp_avails1 `plusImportAvails` imp_avails2)
+ imp_avails1 `plusImportAvails` imp_avails2,
+ hpc_usage1 || hpc_usage2)
mkPrelImports :: Module -> Bool -> [LImportDecl RdrName] -> [LImportDecl RdrName]
-- Consruct the implicit declaration "import Prelude" (or not)
rnImportDecl :: Module
-> LImportDecl RdrName
- -> RnM (LImportDecl Name, GlobalRdrEnv, ImportAvails)
+ -> RnM (LImportDecl Name, GlobalRdrEnv, ImportAvails,AnyHpcUsage)
rnImportDecl this_mod (L loc (ImportDecl loc_imp_mod_name want_boot
qual_only as_mod imp_details))
other -> False
imports = ImportAvails {
- imp_mods = unitModuleEnv imp_mod (imp_mod, import_all, loc),
+ imp_mods = unitModuleEnv imp_mod (imp_mod, [(qual_mod_name, import_all, loc)]),
imp_orphs = orphans,
imp_finsts = finsts,
imp_dep_mods = mkModDeps dependent_mods,
ifOptM Opt_WarnDeprecations (
case deprecs of
DeprecAll txt -> addWarn (moduleDeprec imp_mod_name txt)
- other -> returnM ()
+ other -> return ()
)
let new_imp_decl = L loc (ImportDecl loc_imp_mod_name want_boot
qual_only as_mod new_imp_details)
- returnM (new_imp_decl, gbl_env, imports)
+ return (new_imp_decl, gbl_env, imports, mi_hpc iface)
)
warnRedundantSourceImport mod_name
* the ImportAvails
created by its bindings.
-Complain about duplicate bindings
-
\begin{code}
-importsFromLocalDecls :: HsGroup RdrName -> RnM TcGblEnv
-importsFromLocalDecls group
+-- Bool determines shadowing:
+-- true: names in the group should shadow other UnQuals
+-- with the same OccName (used in Template Haskell)
+-- false: duplicates should be reported as an error
+--
+-- The UniqFM (OccName -> FixItem) associates a Name's OccName's
+-- FastString with a fixity declaration (that needs the actual OccName
+-- to be plugged in). This fixity must be brought into scope when such
+-- a Name is.
+importsFromLocalDecls :: Bool -> HsGroup RdrName -> UniqFM (Located Fixity) -> RnM TcGblEnv
+importsFromLocalDecls shadowP group fixities
= do { gbl_env <- getGblEnv
; avails <- getLocalDeclBinders gbl_env group
- ; rdr_env' <- extendRdrEnvRn (tcg_rdr_env gbl_env) avails
+ ; (rdr_env', fix_env') <- extendRdrEnvRn shadowP (tcg_rdr_env gbl_env,
+ tcg_fix_env gbl_env)
+ avails fixities
; traceRn (text "local avails: " <> ppr avails)
- ; returnM (gbl_env { tcg_rdr_env = rdr_env' })
+ ; return (gbl_env { tcg_rdr_env = rdr_env',
+ tcg_fix_env = fix_env'})
}
-extendRdrEnvRn :: GlobalRdrEnv -> [AvailInfo] -> RnM GlobalRdrEnv
+-- Bool determines shadowing as in importsFromLocalDecls.
+-- UniqFM FixItem is the same as in importsFromLocalDecls.
+--
-- Add the new locally-bound names one by one, checking for duplicates as
-- we do so. Remember that in Template Haskell the duplicates
--- might *already be* in the GlobalRdrEnv from higher up the module
-extendRdrEnvRn rdr_env avails
- = foldlM add_local rdr_env (gresFromAvails LocalDef avails)
- where
- add_local rdr_env gre
- | gres <- lookupGlobalRdrEnv rdr_env (nameOccName (gre_name gre))
- , (dup_gre:_) <- filter isLocalGRE gres -- Check for existing *local* defns
- = do { addDupDeclErr (gre_name dup_gre) (gre_name gre)
- ; return rdr_env }
- | otherwise
- = return (extendGlobalRdrEnv rdr_env gre)
+-- might *already be* in the GlobalRdrEnv from higher up the module.
+--
+-- Also update the FixityEnv with the fixities for the names brought into scope.
+--
+-- Note that the return values are the extensions of the two inputs,
+-- not the extras relative to them.
+extendRdrEnvRn :: Bool -> (GlobalRdrEnv, NameEnv FixItem)
+ -> [AvailInfo] -> UniqFM (Located Fixity) -> RnM (GlobalRdrEnv, NameEnv FixItem)
+extendRdrEnvRn shadowP (rdr_env, fix_env) avails fixities =
+ let -- if there is a fixity decl for the gre,
+ -- add it to the fixity env
+ extendFixEnv env gre =
+ let name = gre_name gre
+ occ = nameOccName name
+ curKey = occNameFS occ in
+ case lookupUFM fixities curKey of
+ Nothing -> env
+ Just (L _ fi) -> extendNameEnv env name (FixItem occ fi)
+
+ (rdr_env_to_extend, extender) =
+ if shadowP
+ then -- when shadowing is on,
+ -- (1) we need to remove the existing Unquals for the
+ -- names we're extending the env with
+ -- (2) but extending the env is simple
+ let names = concatMap availNames avails
+ new_occs = map nameOccName names
+ trimmed_rdr_env = hideSomeUnquals rdr_env new_occs
+ in
+ (trimmed_rdr_env,
+ \(cur_rdr_env, cur_fix_env) -> \gre ->
+ return (extendGlobalRdrEnv cur_rdr_env gre,
+ extendFixEnv cur_fix_env gre))
+ else -- when shadowing is off,
+ -- (1) we don't munge the incoming env
+ -- (2) but we need to check for dups when extending
+ (rdr_env,
+ \(cur_rdr_env, cur_fix_env) -> \gre ->
+ let gres = lookupGlobalRdrEnv cur_rdr_env (nameOccName (gre_name gre))
+ in case filter isLocalGRE gres of -- Check for existing *local* defns
+ dup_gre:_ -> do { addDupDeclErr (gre_name dup_gre) (gre_name gre)
+ ; return (cur_rdr_env, cur_fix_env) }
+ [] -> return (extendGlobalRdrEnv cur_rdr_env gre,
+ extendFixEnv cur_fix_env gre))
+ in foldlM extender (rdr_env_to_extend, fix_env) (gresFromAvails LocalDef avails)
\end{code}
@getLocalDeclBinders@ returns the names for an @HsDecl@. It's
*** See "THE NAMING STORY" in HsDecls ****
-Instances of indexed types
+Instances of type families
~~~~~~~~~~~~~~~~~~~~~~~~~~
Indexed data/newtype instances contain data constructors that we need to
collect, too. Moreover, we need to descend into the data/newtypes instances
don't return it in the 'AvailInfo'.
\begin{code}
+-- Note: this function does NOT get the binders of the ValBinds that
+-- will be bound during renaming
getLocalDeclBinders :: TcGblEnv -> HsGroup RdrName -> RnM [AvailInfo]
getLocalDeclBinders gbl_env (HsGroup {hs_valds = ValBindsIn val_decls val_sigs,
- hs_tyclds = tycl_decls,
- hs_instds = inst_decls,
- hs_fords = foreign_decls })
- = do { tc_names_s <- mappM new_tc tycl_decls
- ; at_names_s <- mappM inst_ats inst_decls
- ; val_names <- mappM new_simple val_bndrs
+ hs_tyclds = tycl_decls,
+ hs_instds = inst_decls,
+ hs_fords = foreign_decls })
+ = do { tc_names_s <- mapM new_tc tycl_decls
+ ; at_names_s <- mapM inst_ats inst_decls
+ ; val_names <- mapM new_simple val_bndrs
; return (val_names ++ tc_names_s ++ concat at_names_s) }
where
mod = tcg_mod gbl_env
is_hs_boot = isHsBoot (tcg_src gbl_env) ;
- val_bndrs | is_hs_boot = sig_hs_bndrs
- | otherwise = for_hs_bndrs ++ val_hs_bndrs
- -- In a hs-boot file, the value binders come from the
- -- *signatures*, and there should be no foreign binders
+
+ for_hs_bndrs = [nm | L _ (ForeignImport nm _ _) <- foreign_decls]
+
+ -- In a hs-boot file, the value binders come from the
+ -- *signatures*, and there should be no foreign binders
+ val_bndrs | is_hs_boot = [nm | L _ (TypeSig nm _) <- val_sigs]
+ | otherwise = for_hs_bndrs
new_simple rdr_name = do
nm <- newTopSrcBinder mod rdr_name
return (Avail nm)
- sig_hs_bndrs = [nm | L _ (TypeSig nm _) <- val_sigs]
- val_hs_bndrs = collectHsBindLocatedBinders val_decls
- for_hs_bndrs = [nm | L _ (ForeignImport nm _ _) <- foreign_decls]
-
new_tc tc_decl
| isFamInstDecl (unLoc tc_decl)
= do { main_name <- lookupFamInstDeclBndr mod main_rdr
- ; sub_names <- mappM (newTopSrcBinder mod) sub_rdrs
+ ; sub_names <- mapM (newTopSrcBinder mod) sub_rdrs
; return (AvailTC main_name sub_names) }
-- main_name is not bound here!
| otherwise
= do { main_name <- newTopSrcBinder mod main_rdr
- ; sub_names <- mappM (newTopSrcBinder mod) sub_rdrs
+ ; sub_names <- mapM (newTopSrcBinder mod) sub_rdrs
; return (AvailTC main_name (main_name : sub_names)) }
where
(main_rdr : sub_rdrs) = tyClDeclNames (unLoc tc_decl)
inst_ats inst_decl
- = mappM new_tc (instDeclATs (unLoc inst_decl))
+ = mapM new_tc (instDeclATs (unLoc inst_decl))
getLocalDeclBinders _ _ = panic "getLocalDeclBinders" -- ValBindsOut can't happen
\end{code}
filterImports iface decl_spec (Just (want_hiding, import_items)) all_avails
= do -- check for errors, convert RdrNames to Names
- opt_indexedtypes <- doptM Opt_IndexedTypes
- items1 <- mapM (lookup_lie opt_indexedtypes) import_items
+ opt_typeFamilies <- doptM Opt_TypeFamilies
+ items1 <- mapM (lookup_lie opt_typeFamilies) import_items
let items2 :: [(LIE Name, AvailInfo)]
items2 = concat items1
(name, AvailTC name subs, Just parent)
lookup_lie :: Bool -> LIE RdrName -> TcRn [(LIE Name, AvailInfo)]
- lookup_lie opt_indexedtypes (L loc ieRdr)
+ lookup_lie opt_typeFamilies (L loc ieRdr)
= do
stuff <- setSrcSpan loc $
- case lookup_ie opt_indexedtypes ieRdr of
+ case lookup_ie opt_typeFamilies ieRdr of
Failed err -> addErr err >> return []
Succeeded a -> return a
checkDodgyImport stuff
-- AvailInfos for the data constructors and the family (as they have
-- different parents). See the discussion at occ_env.
lookup_ie :: Bool -> IE RdrName -> MaybeErr Message [(IE Name,AvailInfo)]
- lookup_ie opt_indexedtypes ie
+ lookup_ie opt_typeFamilies ie
= let bad_ie = Failed (badImportItemErr iface decl_spec ie)
lookup_name rdrName =
children <- if any isNothing mb_children
then bad_ie
else return (catMaybes mb_children)
- -- check for proper import of indexed types
- when (not opt_indexedtypes && any isTyConName children) $
+ -- check for proper import of type families
+ when (not opt_typeFamilies && any isTyConName children) $
Failed (typeItemErr (head . filter isTyConName $ children)
(text "in import list"))
case mb_parent of
-- it came from. It's illegal to export two distinct things
-- that have the same occurrence name
-rnExports :: Bool -- False => no 'module M(..) where' header at all
+rnExports :: Bool -- False => no 'module M(..) where' header at all
-> Maybe [LIE RdrName] -- Nothing => no explicit export list
- -> RnM (Maybe [LIE Name], [AvailInfo])
+ -> TcGblEnv
+ -> RnM TcGblEnv
-- Complains if two distinct exports have same OccName
-- Warns about identical exports.
-- Complains about exports items not in scope
-rnExports explicit_mod exports
- = do TcGblEnv { tcg_mod = this_mod,
- tcg_rdr_env = rdr_env,
- tcg_imports = imports } <- getGblEnv
-
+rnExports explicit_mod exports
+ tcg_env@(TcGblEnv { tcg_mod = this_mod,
+ tcg_rdr_env = rdr_env,
+ tcg_imports = imports })
+ = do {
-- If the module header is omitted altogether, then behave
-- as if the user had written "module Main(main) where..."
-- EXCEPT in interactive mode, when we behave as if he had
-- written "module Main where ..."
-- Reason: don't want to complain about 'main' not in scope
-- in interactive mode
- ghc_mode <- getGhcMode
- real_exports <-
- case () of
- () | explicit_mod
- -> return exports
- | ghc_mode == Interactive
- -> return Nothing
- | otherwise
- -> do mainName <- lookupGlobalOccRn main_RDR_Unqual
- return (Just ([noLoc (IEVar main_RDR_Unqual)]))
- -- ToDo: the 'noLoc' here is unhelpful if 'main' turns
- -- out to be out of scope
-
- (exp_spec, avails) <- exports_from_avail real_exports rdr_env imports this_mod
-
- return (exp_spec, nubAvails avails) -- Combine families
+ ; dflags <- getDOpts
+ ; let real_exports
+ | explicit_mod = exports
+ | ghcLink dflags == LinkInMemory = Nothing
+ | otherwise = Just ([noLoc (IEVar main_RDR_Unqual)])
+ -- ToDo: the 'noLoc' here is unhelpful if 'main'
+ -- turns out to be out of scope
+
+ ; (rn_exports, avails) <- exports_from_avail real_exports rdr_env imports this_mod
+ ; let final_avails = nubAvails avails -- Combine families
+
+ ; return (tcg_env { tcg_exports = final_avails,
+ tcg_rn_exports = case tcg_rn_exports tcg_env of
+ Nothing -> Nothing
+ Just _ -> rn_exports,
+ tcg_dus = tcg_dus tcg_env `plusDU`
+ usesOnly (availsToNameSet final_avails) }) }
+
exports_from_avail :: Maybe [LIE RdrName]
-- Nothing => no explicit export list
kids_env :: NameEnv [Name] -- Maps a parent to its in-scope children
kids_env = mkChildEnv (globalRdrEnvElts rdr_env)
+ imported_modules = [ qual_name
+ | (_, xs) <- moduleEnvElts $ imp_mods imports,
+ (qual_name, _, _) <- xs ]
+
exports_from_item :: ExportAccum -> LIE RdrName -> RnM ExportAccum
exports_from_item acc@(ie_names, occs, exports)
(L loc ie@(IEModuleContents mod))
, mod `elem` earlier_mods -- Duplicate export of M
= do { warn_dup_exports <- doptM Opt_WarnDuplicateExports ;
warnIf warn_dup_exports (dupModuleExport mod) ;
- returnM acc }
+ return acc }
| otherwise
= do { implicit_prelude <- doptM Opt_ImplicitPrelude
- ; let gres = filter (isModuleExported implicit_prelude mod)
- (globalRdrEnvElts rdr_env)
+ ; let { exportValid = (mod `elem` imported_modules)
+ || (moduleName this_mod == mod)
+ ; gres = filter (isModuleExported implicit_prelude mod)
+ (globalRdrEnvElts rdr_env)
+ }
- ; warnIf (null gres) (nullModuleExport mod)
+ ; checkErr exportValid (moduleNotImported mod)
+ ; warnIf (exportValid && null gres) (nullModuleExport mod)
; occs' <- check_occs ie occs (map gre_name gres)
-- This check_occs not only finds conflicts
then do addErr (exportItemErr ie)
return (IEThingWith name [], AvailTC name [name])
else do let names = catMaybes mb_names
- optIdxTypes <- doptM Opt_IndexedTypes
- when (not optIdxTypes && any isTyConName names) $
+ optTyFam <- doptM Opt_TypeFamilies
+ when (not optTyFam && any isTyConName names) $
addErr (typeItemErr ( head
. filter isTyConName
$ names )
where
check occs name
= case lookupOccEnv occs name_occ of
- Nothing -> returnM (extendOccEnv occs name_occ (name, ie))
+ Nothing -> return (extendOccEnv occs name_occ (name, ie))
Just (name', ie')
| name == name' -- Duplicate export
-> do { warn_dup_exports <- doptM Opt_WarnDuplicateExports ;
warnIf warn_dup_exports (dupExportWarn name_occ ie ie') ;
- returnM occs }
+ return occs }
| otherwise -- Same occ name but different names: an error
-> do { global_env <- getGlobalRdrEnv ;
addErr (exportClashErr global_env name' name ie' ie) ;
- returnM occs }
+ return occs }
where
name_occ = nameOccName name
\end{code}
%*********************************************************
\begin{code}
-reportDeprecations :: DynFlags -> TcGblEnv -> RnM ()
-reportDeprecations dflags tcg_env
- = ifOptM Opt_WarnDeprecations $
- do { (eps,hpt) <- getEpsAndHpt
+finishDeprecations :: DynFlags -> Maybe DeprecTxt
+ -> TcGblEnv -> RnM TcGblEnv
+-- (a) Report usasge of deprecated imports
+-- (b) If the whole module is deprecated, update tcg_deprecs
+-- All this happens only once per module
+finishDeprecations dflags mod_deprec tcg_env
+ = do { (eps,hpt) <- getEpsAndHpt
+ ; ifOptM Opt_WarnDeprecations $
+ mapM_ (check hpt (eps_PIT eps)) all_gres
-- By this time, typechecking is complete,
-- so the PIT is fully populated
- ; mapM_ (check hpt (eps_PIT eps)) all_gres }
+
+ -- Deal with a module deprecation; it overrides all existing deprecs
+ ; let new_deprecs = case mod_deprec of
+ Just txt -> DeprecAll txt
+ Nothing -> tcg_deprecs tcg_env
+ ; return (tcg_env { tcg_deprecs = new_deprecs }) }
where
used_names = allUses (tcg_dus tcg_env)
-- Report on all deprecated uses; hence allUses
extra | imp_mod == moduleName name_mod = empty
| otherwise = ptext SLIT(", but defined in") <+> ppr name_mod
- check hpt pit ok_gre = returnM () -- Local, or not used, or not deprectated
+ check hpt pit ok_gre = return () -- Local, or not used, or not deprectated
-- The Imported pattern-match: don't deprecate 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
-- The name is definitely imported, so look in HPT, PIT
lookupImpDeprec dflags hpt pit gre
= case lookupIfaceByModule dflags hpt pit (nameModule name) of
- Just iface -> mi_dep_fn iface name `seqMaybe` -- Bleat if the thing, *or
+ Just iface -> mi_dep_fn iface name `mplus` -- Bleat if the thing, *or
case gre_par gre of
ParentIs p -> mi_dep_fn iface p -- its parent*, is deprec'd
NoParent -> Nothing
-- qualified imports into account. But it's an improvement.
add_expall mod acc = addToFM_C plusAvailEnv acc mod emptyAvailEnv
- add_inst_mod (mod,_,_) acc
+ add_inst_mod (mod, _) acc
| mod_name `elemFM` acc = acc -- We import something already
| otherwise = addToFM acc mod_name emptyAvailEnv
where
imports = tcg_imports gbl_env
- direct_import_mods :: [(Module, Bool, SrcSpan)]
+ direct_import_mods :: [(Module, [(ModuleName, Bool, SrcSpan)])]
-- See the type of the imp_mods for this triple
direct_import_mods = moduleEnvElts (imp_mods imports)
-- [Note: not 'minimal_imports', because that includes directly-imported
-- modules even if we use nothing from them; see notes above]
--
- -- BUG WARNING: does not deal correctly with multiple imports of the same module
- -- becuase direct_import_mods has only one entry per module
+ -- BUG WARNING: this code is generally buggy
unused_imp_mods :: [(ModuleName, SrcSpan)]
- unused_imp_mods = [(mod_name,loc) | (mod,no_imp,loc) <- direct_import_mods,
+ unused_imp_mods = [(mod_name,loc)
+ | (mod, xs) <- direct_import_mods,
+ (_, no_imp, loc) <- xs,
let mod_name = moduleName mod,
not (mod_name `elemFM` minimal_imports1),
mod /= pRELUDE,
warnDuplicateImports gres
= ifOptM Opt_WarnUnusedImports $
- sequenceM_ [ warn name pr
+ sequence_ [ warn name pr
| GRE { gre_name = name, gre_prov = Imported imps } <- gres
, pr <- redundants imps ]
where
printMinimalImports imps
= ifOptM Opt_D_dump_minimal_imports $ do {
- mod_ies <- initIfaceTcRn $ mappM to_ies (fmToList imps) ;
+ mod_ies <- initIfaceTcRn $ mapM to_ies (fmToList imps) ;
this_mod <- getModule ;
rdr_env <- getGlobalRdrEnv ;
- ioToTcRn (do { h <- openFile (mkFilename this_mod) WriteMode ;
- printForUser h (mkPrintUnqualified rdr_env)
- (vcat (map ppr_mod_ie mod_ies)) })
+ dflags <- getDOpts ;
+ liftIO $ do h <- openFile (mkFilename this_mod) WriteMode
+ printForUser h (mkPrintUnqualified dflags rdr_env)
+ (vcat (map ppr_mod_ie mod_ies))
}
where
mkFilename this_mod = moduleNameString (moduleName this_mod) ++ ".imports"
parens (fsep (punctuate comma (map ppr ies)))
to_ies (mod, avail_env) = do ies <- mapM to_ie (availEnvElts avail_env)
- returnM (mod, ies)
+ return (mod, ies)
to_ie :: AvailInfo -> IfG (IE Name)
-- The main trick here is that if we're importing all the constructors
-- we want to say "T(..)", but if we're importing only a subset we want
-- to say "T(A,B,C)". So we have to find out what the module exports.
- to_ie (Avail n) = returnM (IEVar n)
+ to_ie (Avail n) = return (IEVar n)
to_ie (AvailTC n [m]) = ASSERT( n==m )
- returnM (IEThingAbs n)
- to_ie (AvailTC n ns)
- = loadSysInterface doc n_mod `thenM` \ iface ->
+ return (IEThingAbs n)
+ to_ie (AvailTC n ns) = do
+ iface <- loadSysInterface doc n_mod
case [xs | (m,as) <- mi_exports iface,
m == n_mod,
AvailTC x xs <- as,
x == nameOccName n] of
- [xs] | all_used xs -> returnM (IEThingAll n)
- | otherwise -> returnM (IEThingWith n (filter (/= n) ns))
+ [xs] | all_used xs -> return (IEThingAll n)
+ | otherwise -> return (IEThingWith n (filter (/= n) ns))
other -> pprTrace "to_ie" (ppr n <+> ppr n_mod <+> ppr other) $
- returnM (IEVar n)
+ return (IEVar n)
where
all_used avail_occs = all (`elem` map nameOccName ns) avail_occs
doc = text "Compute minimal imports from" <+> ppr n
dodgyMsg kind tc
= sep [ ptext SLIT("The") <+> kind <+> ptext SLIT("item") <+> quotes (ppr (IEThingAll tc)),
- ptext SLIT("suggests that") <+> quotes (ppr tc) <+> ptext SLIT("has constructor or class methods"),
- ptext SLIT("but it has none; it is a type synonym or abstract type or class") ]
+ ptext SLIT("suggests that") <+> quotes (ppr tc) <+> ptext SLIT("has constructors or class methods,"),
+ ptext SLIT("but it has none") ]
exportItemErr export_item
= sep [ ptext SLIT("The export item") <+> quotes (ppr export_item),
typeItemErr name wherestr
= sep [ ptext SLIT("Using 'type' tag on") <+> quotes (ppr name) <+> wherestr,
- ptext SLIT("Use -findexed-types to enable this extension") ]
+ ptext SLIT("Use -XTypeFamilies to enable this extension") ]
+exportClashErr :: GlobalRdrEnv -> Name -> Name -> IE RdrName -> IE RdrName
+ -> Message
exportClashErr global_env name1 name2 ie1 ie2
= vcat [ ptext SLIT("Conflicting exports for") <+> quotes (ppr occ) <> colon
- , ppr_export ie1 name1
- , ppr_export ie2 name2 ]
+ , ppr_export ie1' name1'
+ , ppr_export ie2' name2' ]
where
occ = nameOccName name1
ppr_export ie name = nest 2 (quotes (ppr ie) <+> ptext SLIT("exports") <+>
= case lookupGRE_Name global_env name of
(gre:_) -> gre
[] -> pprPanic "exportClashErr" (ppr name)
+ get_loc name = nameSrcLoc $ gre_name $ get_gre name
+ (name1', ie1', name2', ie2') = if get_loc name1 < get_loc name2
+ then (name1, ie1, name2, ie2)
+ else (name2, ie2, name1, ie1)
addDupDeclErr :: Name -> Name -> TcRn ()
addDupDeclErr name_a name_b
quotes (ptext SLIT("Module") <+> ppr mod),
ptext SLIT("in export list")]
+moduleNotImported :: ModuleName -> SDoc
+moduleNotImported mod
+ = ptext SLIT("The export item `module") <+> ppr mod <>
+ ptext SLIT("' is not imported")
+
nullModuleExport mod
= ptext SLIT("The export item `module") <+> ppr mod <> ptext SLIT("' exports nothing")
moduleDeprec mod txt
= sep [ ptext SLIT("Module") <+> quotes (ppr mod) <+> ptext SLIT("is deprecated:"),
nest 4 (ppr txt) ]
+
+implicitPreludeWarn
+ = ptext SLIT("Module `Prelude' implicitly imported")
\end{code}