-%
+s%
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[TcModule]{Typechecking a whole module}
#endif
import CmdLineOpts ( DynFlag(..), opt_PprStyle_Debug, dopt )
+import Packages ( moduleToPackageConfig, mkPackageId, package,
+ isHomeModule )
import DriverState ( v_MainModIs, v_MainFunIs )
import HsSyn ( HsModule(..), HsExtCore(..), HsGroup(..), LHsDecl, SpliceDecl(..), HsBind(..),
nlHsApp, nlHsVar, pprLHsBinds )
import RdrHsSyn ( findSplice )
-import PrelNames ( runIOName, rootMainName, mAIN_Name,
+import PrelNames ( runMainIOName, rootMainName, mAIN,
main_RDR_Unqual )
import RdrName ( RdrName, mkRdrUnqual, emptyGlobalRdrEnv,
plusGlobalRdrEnv )
import TcRnMonad
import TcType ( tidyTopType, tcEqType, mkTyVarTys, substTyWith )
import Inst ( showLIE )
+import InstEnv ( extendInstEnvList )
import TcBinds ( tcTopBinds )
import TcDefaults ( tcDefaults )
import TcEnv ( tcExtendGlobalValEnv )
import TcSimplify ( tcSimplifyTop )
import TcTyClsDecls ( tcTyAndClassDecls )
import LoadIface ( loadOrphanModules, loadHiBootInterface )
-import IfaceEnv ( lookupOrig )
-import RnNames ( importsFromLocalDecls, rnImports, exportsFromAvail,
+import RnNames ( importsFromLocalDecls, rnImports, exportsFromAvail,
reportUnusedNames, reportDeprecations )
import RnEnv ( lookupSrcOcc_maybe )
import RnSource ( rnSrcDecls, rnTyClDecls, checkModDeprec )
import PprCore ( pprIdRules, pprCoreBindings )
import CoreSyn ( IdCoreRule, bindersOfBinds )
+import DataCon ( dataConWrapId )
import ErrUtils ( Messages, mkDumpDoc, showPass )
import Id ( mkExportedLocalId, isLocalId, idName, idType )
import Var ( Var )
-import Module ( mkHomeModule, mkModuleName, moduleName, moduleEnvElts )
+import Module ( Module, ModuleEnv, mkModule, moduleEnvElts )
import OccName ( mkVarOcc )
import Name ( Name, isExternalName, getSrcLoc, getOccName )
import NameSet
import SrcLoc ( srcLocSpan, Located(..), noLoc )
import Outputable
import HscTypes ( ModGuts(..), HscEnv(..), ExternalPackageState(..),
- GhciMode(..), noDependencies, isOneShot,
- Deprecs( NoDeprecs ), ModIface(..), plusDeprecs,
+ GhciMode(..), IsBootInterface, noDependencies,
+ Deprecs( NoDeprecs ), plusDeprecs,
ForeignStubs(NoStubs), TyThing(..),
- TypeEnv, lookupTypeEnv,
+ TypeEnv, lookupTypeEnv, hptInstances,
extendTypeEnvWithIds, typeEnvIds, typeEnvTyCons,
- emptyFixityEnv, availName
+ emptyFixityEnv
)
#ifdef GHCI
import HsSyn ( HsStmtContext(..), Stmt(..), HsExpr(..), HsBindGroup(..),
LStmt, LHsExpr, LHsType, mkMatchGroup,
- collectStmtsBinders, mkSimpleMatch, placeHolderType,
+ collectStmtsBinders, mkSimpleMatch,
nlLetStmt, nlExprStmt, nlBindStmt, nlResultStmt, nlVarPat )
import RdrName ( GlobalRdrEnv, mkGlobalRdrEnv, GlobalRdrElt(..),
Provenance(..), ImportSpec(..),
import TcHsType ( kcHsType )
import TcExpr ( tcCheckRho )
import TcIface ( loadImportedInsts )
-import TcMType ( zonkTcType )
+import TcMType ( zonkTcType, zonkQuantifiedTyVar )
import TcUnify ( unifyTyConApp )
import TcMatches ( tcStmtsAndThen, TcStmtCtxt(..) )
import TcSimplify ( tcSimplifyInteractive, tcSimplifyInfer )
import IfaceSyn ( IfaceDecl(..), IfaceClassOp(..), IfaceConDecl(..),
IfaceExtName(..), IfaceConDecls(..), IfaceInst(..),
tyThingToIfaceDecl, dfunToIfaceInst )
+import IfaceEnv ( lookupOrig )
import RnEnv ( lookupOccRn, dataTcOccs, lookupFixityRn )
-import Id ( Id, isImplicitId, globalIdDetails )
+import Id ( Id, isImplicitId, setIdType, globalIdDetails )
import MkId ( unsafeCoerceId )
import DataCon ( dataConTyCon )
import TyCon ( tyConName )
import SrcLoc ( interactiveSrcLoc, unLoc )
import Kind ( Kind )
import Var ( globaliseId )
-import Name ( nameOccName, nameModuleName )
+import Name ( nameOccName, nameModule )
import NameEnv ( delListFromNameEnv )
import PrelNames ( iNTERACTIVE, ioTyConName, printName, monadNames, itName, returnIOName )
-import Module ( ModuleName, lookupModuleEnvByName )
-import HscTypes ( InteractiveContext(..), ExternalPackageState( eps_PTE ),
- HomeModInfo(..), typeEnvElts, typeEnvClasses,
- availNames, icPrintUnqual,
+import Module ( Module, lookupModuleEnv )
+import HscTypes ( InteractiveContext(..), HomeModInfo(..), typeEnvElts, typeEnvClasses,
+ availNames, availName, ModIface(..),
ModDetails(..), Dependencies(..) )
import BasicTypes ( RecFlag(..), Fixity )
import Bag ( unitBag )
-> Located (HsModule RdrName)
-> IO (Messages, Maybe TcGblEnv)
-tcRnModule hsc_env (L loc (HsModule maybe_mod exports
+tcRnModule hsc_env (L loc (HsModule maybe_mod export_ies
import_decls local_decls mod_deprec))
= do { showPass (hsc_dflags hsc_env) "Renamer/typechecker" ;
let { this_mod = case maybe_mod of
- Nothing -> mkHomeModule mAIN_Name
+ Nothing -> mAIN
-- 'module M where' is omitted
Just (L _ mod) -> mod } ;
-- The normal case
initTc hsc_env this_mod $
setSrcSpan loc $
- do { -- Deal with imports; sets tcg_rdr_env, tcg_imports
+ do {
+ checkForPackageModule (hsc_dflags hsc_env) this_mod;
+
+ -- Deal with imports; sets tcg_rdr_env, tcg_imports
(rdr_env, imports) <- rnImports import_decls ;
- -- In one-shot mode, record boot-file info in the EPS
- ifM (isOneShot (hsc_mode hsc_env)) $
- updateEps_ (\eps -> eps { eps_is_boot = imp_dep_mods imports }) ;
+ -- Record boot-file info in the EPS, so that it's
+ -- visible to loadHiBootInterface in tcRnSrcDecls,
+ -- and any other incrementally-performed imports
+ let { dep_mods :: ModuleEnv (Module, IsBootInterface)
+ ; dep_mods = imp_dep_mods imports } ;
+
+ updateEps_ (\eps -> eps { eps_is_boot = dep_mods }) ;
-- Update the gbl env
- updGblEnv ( \ gbl -> gbl { tcg_rdr_env = rdr_env,
- tcg_imports = tcg_imports gbl `plusImportAvails` imports })
- $ do {
+ let { home_insts = hptInstances hsc_env (moduleEnvElts dep_mods) } ;
+ updGblEnv ( \ gbl ->
+ gbl { tcg_rdr_env = rdr_env,
+ tcg_inst_env = extendInstEnvList (tcg_inst_env gbl) home_insts,
+ tcg_imports = tcg_imports gbl `plusImportAvails` imports })
+ $ do {
+
traceRn (text "rn1" <+> ppr (imp_dep_mods imports)) ;
-- Fail if there are any errors so far
-- The error printing (if needed) takes advantage
reportDeprecations tcg_env ;
-- Process the export list
- exports <- exportsFromAvail (isJust maybe_mod) exports ;
-
-{- Jan 04: I don't think this is necessary any more; usage info is derived from tcg_dus
- -- Get any supporting decls for the exports that have not already
- -- been sucked in for the declarations in the body of the module.
- -- (This can happen if something is imported only to be re-exported.)
- --
- -- Importing these supporting declarations is required
- -- *only* to gether usage information
- -- (see comments with MkIface.mkImportInfo for why)
- -- We don't need the results, but sucking them in may side-effect
- -- the ExternalPackageState, apart from recording usage
- mappM (tcLookupGlobal . availName) export_avails ;
--}
+ exports <- exportsFromAvail (isJust maybe_mod) export_ies ;
-- Check whether the entire module is deprecated
-- This happens only once per module
tcDump final_env ;
return final_env
}}}}
+
+-- This is really a sanity check that the user has given -package-name
+-- if necessary. -package-name is only necessary when the package database
+-- already contains the current package, because then we can't tell
+-- whether a given module is in the current package or not, without knowing
+-- the name of the current package.
+checkForPackageModule dflags this_mod
+ | not (isHomeModule dflags this_mod),
+ Just (pkg,_) <- moduleToPackageConfig dflags this_mod =
+ let
+ ppr_pkg = ppr (mkPackageId (package pkg))
+ in
+ addErr (ptext SLIT("Module") <+> quotes (ppr this_mod) <+>
+ ptext SLIT("is a member of package") <+> ppr_pkg <> char '.' $$
+ ptext SLIT("To compile this module, please use -ignore-package") <+> ppr_pkg <> char '.')
+ | otherwise = return ()
\end{code}
-- Typecheck them all together so that
-- any mutually recursive types are done right
- tcg_env <- checkNoErrs (tcTyAndClassDecls rn_decls) ;
+ tcg_env <- checkNoErrs (tcTyAndClassDecls [{- no boot names -}] rn_decls) ;
-- Make the new type env available to stuff slurped from interface files
setGblEnv tcg_env $ do {
-- Now the core bindings
- core_binds <- initIfaceExtCore (tcExtCoreBindings this_mod src_binds) ;
+ core_binds <- initIfaceExtCore (tcExtCoreBindings src_binds) ;
-- Wrap up
let {
-- Returns the variables free in the decls
-- Reason: solely to report unused imports and bindings
tcRnSrcDecls decls
- = do { mb_boot_iface <- loadHiBootInterface ;
+ = do { -- Load the hi-boot interface for this module, if any
+ -- We do this now so that the boot_names can be passed
+ -- to tcTyAndClassDecls, because the boot_names are
+ -- automatically considered to be loop breakers
+ boot_names <- loadHiBootInterface ;
-- Do all the declarations
- (tc_envs, lie) <- getLIE (tc_rn_src_decls decls) ;
+ (tc_envs, lie) <- getLIE (tc_rn_src_decls boot_names decls) ;
-- tcSimplifyTop deals with constant or ambiguous InstIds.
-- How could there be ambiguous ones? They can only arise if a
let { final_type_env = extendTypeEnvWithIds type_env bind_ids } ;
-- Compre the hi-boot iface (if any) with the real thing
- checkHiBootIface final_type_env mb_boot_iface ;
+ checkHiBootIface final_type_env boot_names ;
-- Make the new type env available to stuff slurped from interface files
writeMutVar (tcg_type_env_var tcg_env) final_type_env ;
tcg_binds = binds', tcg_rules = rules', tcg_fords = fords' })
}
-tc_rn_src_decls :: [LHsDecl RdrName] -> TcM (TcGblEnv, TcLclEnv)
+tc_rn_src_decls :: [Name] -> [LHsDecl RdrName] -> TcM (TcGblEnv, TcLclEnv)
-- Loops around dealing with each top level inter-splice group
-- in turn, until it's dealt with the entire module
-tc_rn_src_decls ds
+tc_rn_src_decls boot_names ds
= do { let { (first_group, group_tail) = findSplice ds } ;
-- If ds is [] we get ([], Nothing)
-- Type check the decls up to, but not including, the first splice
- tc_envs@(tcg_env,tcl_env) <- tcRnGroup first_group ;
+ tc_envs@(tcg_env,tcl_env) <- tcRnGroup boot_names first_group ;
-- Bale out if errors; for example, error recovery when checking
-- the RHS of 'main' can mean that 'main' is not in the envt for
-- Glue them on the front of the remaining decls and loop
setGblEnv (tcg_env `addTcgDUs` usesOnly splice_fvs) $
- tc_rn_src_decls (spliced_decls ++ rest_ds)
+ tc_rn_src_decls boot_names (spliced_decls ++ rest_ds)
#endif /* GHCI */
}}}
\end{code}
the hi-boot interface as our checklist.
\begin{code}
-checkHiBootIface :: TypeEnv -> Maybe ModIface -> TcM ()
+checkHiBootIface :: TypeEnv -> [Name] -> TcM ()
-- Compare the hi-boot file for this module (if there is one)
-- with the type environment we've just come up with
-checkHiBootIface env Nothing -- No hi-boot
- = return ()
+-- In the common case where there is no hi-boot file, the list
+-- of boot_names is empty.
+checkHiBootIface env boot_names
+ = mapM_ (check_one env) boot_names
-checkHiBootIface env (Just iface)
- = mapM_ (check_one env) exports
- where
- exports = [ (mod, availName avail) | (mod,avails) <- mi_exports iface,
- avail <- avails]
----------------
-check_one local_env (mod,occ)
- = do { name <- lookupOrig mod occ
- ; eps <- getEps
+check_one local_env name
+ = do { eps <- getEps
-- Look up the hi-boot one;
-- it should jolly well be there (else GHC bug)
| idType boot_id `tcEqType` idType real_id
= return ()
+check_thing (ADataCon dc1) (ADataCon dc2)
+ | idType (dataConWrapId dc1) `tcEqType` idType (dataConWrapId dc2)
+ = return ()
+
+ -- Can't declare a class in a hi-boot file
+
check_thing boot_thing real_thing -- Default case; failure
= addErrAt (srcLocSpan (getSrcLoc real_thing))
(bootMisMatch real_thing)
monad; it augments it and returns the new TcGblEnv.
\begin{code}
-tcRnGroup :: HsGroup RdrName -> TcM (TcGblEnv, TcLclEnv)
+tcRnGroup :: [Name] -> HsGroup RdrName -> TcM (TcGblEnv, TcLclEnv)
-- Returns the variables free in the decls, for unused-binding reporting
-tcRnGroup decls
+tcRnGroup boot_names decls
= do { -- Rename the declarations
(tcg_env, rn_decls) <- rnTopSrcDecls decls ;
setGblEnv tcg_env $ do {
-- Typecheck the declarations
- tcTopSrcDecls rn_decls
+ tcTopSrcDecls boot_names rn_decls
}}
------------------------------------------------
}}
------------------------------------------------
-tcTopSrcDecls :: HsGroup Name -> TcM (TcGblEnv, TcLclEnv)
-tcTopSrcDecls
+tcTopSrcDecls :: [Name] -> HsGroup Name -> TcM (TcGblEnv, TcLclEnv)
+tcTopSrcDecls boot_names
(HsGroup { hs_tyclds = tycl_decls,
hs_instds = inst_decls,
hs_fords = foreign_decls,
-- The latter come in via tycl_decls
traceTc (text "Tc2") ;
- tcg_env <- checkNoErrs (tcTyAndClassDecls tycl_decls) ;
+ tcg_env <- checkNoErrs (tcTyAndClassDecls boot_names tycl_decls) ;
-- tcTyAndClassDecls recovers internally, but if anything gave rise to
-- an error we'd better stop now, to avoid a cascade
mb_main_mod <- readMutVar v_MainModIs ;
mb_main_fn <- readMutVar v_MainFunIs ;
let { main_mod = case mb_main_mod of {
- Just mod -> mkModuleName mod ;
- Nothing -> mAIN_Name } ;
+ Just mod -> mkModule mod ;
+ Nothing -> mAIN } ;
main_fn = case mb_main_fn of {
Just fn -> mkRdrUnqual (mkVarOcc (mkFastString fn)) ;
Nothing -> main_RDR_Unqual } } ;
-- If we are in module Main, check that 'main' is defined.
-- It may be imported from another module!
--
- -- ToDo: We have to return the main_name separately, because it's a
- -- bona fide 'use', and should be recorded as such, but the others
- -- aren't
--
-- Blimey: a whole page of code to do this...
- | mod_name /= main_mod
+ | mod /= main_mod
= return tcg_env
| otherwise
Nothing -> do { complain_no_main
; return tcg_env } ;
Just main_name -> do
- { let { rhs = nlHsApp (nlHsVar runIOName) (nlHsVar main_name) }
- -- :Main.main :: IO () = runIO main
+ { let { rhs = nlHsApp (nlHsVar runMainIOName) (nlHsVar main_name) }
+ -- :Main.main :: IO () = runMainIO main
; (main_expr, ty) <- setSrcSpan (srcLocSpan (getSrcLoc main_name)) $
tcInferRho rhs
`snocBag` main_bind,
tcg_dus = tcg_dus tcg_env
`plusDU` usesOnly (unitFV main_name)
+ -- Record the use of 'main', so that we don't
+ -- complain about it being defined but not used
})
}}}
where
- mod_name = moduleName (tcg_mod tcg_env)
+ mod = tcg_mod tcg_env
complain_no_main | ghci_mode == Interactive = return ()
| otherwise = failWithTc noMainMsg
(bound_ids, tc_expr) <- tcUserStmt rn_stmt ;
traceTc (text "tcs 1") ;
- let { -- Make all the bound ids "global" ids, now that
- -- they're notionally top-level bindings. This is
- -- important: otherwise when we come to compile an expression
- -- using these ids later, the byte code generator will consider
- -- the occurrences to be free rather than global.
- global_ids = map (globaliseId VanillaGlobal) bound_ids ;
+ let { -- (a) Make all the bound ids "global" ids, now that
+ -- they're notionally top-level bindings. This is
+ -- important: otherwise when we come to compile an expression
+ -- using these ids later, the byte code generator will consider
+ -- the occurrences to be free rather than global.
+ --
+ -- (b) Tidy their types; this is important, because :info may
+ -- ask to look at them, and :info expects the things it looks
+ -- up to have tidy types
+ global_ids = map globaliseAndTidy bound_ids ;
-- Update the interactive context
rn_env = ic_rn_local_env ictxt ;
returnM (new_ic, bound_names, tc_expr)
}
-\end{code}
+globaliseAndTidy :: Id -> Id
+globaliseAndTidy id
+-- Give the Id a Global Name, and tidy its type
+ = setIdType (globaliseId VanillaGlobal id) tidy_type
+ where
+ tidy_type = tidyTopType (idType id)
+\end{code}
Here is the grand plan, implemented in tcUserStmt
((tc_expr, res_ty), lie) <- getLIE (tcInferRho rn_expr) ;
((qtvs, _, dict_ids), lie_top) <- getLIE (tcSimplifyInfer smpl_doc (tyVarsOfType res_ty) lie) ;
tcSimplifyInteractive lie_top ;
+ qtvs' <- mappM zonkQuantifiedTyVar qtvs ;
- let { all_expr_ty = mkForAllTys qtvs $
+ let { all_expr_ty = mkForAllTys qtvs' $
mkFunTys (map idType dict_ids) $
res_ty } ;
zonkTcType all_expr_ty
\begin{code}
#ifdef GHCI
-mkExportEnv :: HscEnv -> [ModuleName] -- Expose these modules' exports only
+mkExportEnv :: HscEnv -> [Module] -- Expose these modules' exports only
-> IO GlobalRdrEnv
mkExportEnv hsc_env exports
= do { mb_envs <- initTcPrintErrors hsc_env iNTERACTIVE $
-- Some error; initTc will have printed it
}
-getModuleExports :: ModuleName -> TcM GlobalRdrEnv
+getModuleExports :: Module -> TcM GlobalRdrEnv
getModuleExports mod
= do { iface <- load_iface mod
; loadOrphanModules (dep_orphs (mi_deps iface))
-- Load any orphan-module interfaces,
-- so their instances are visible
- ; avails <- exportsToAvails (mi_exports iface)
+ ; names <- exportsToAvails (mi_exports iface)
; let { gres = [ GRE { gre_name = name, gre_prov = vanillaProv mod }
- | avail <- avails, name <- availNames avail ] }
+ | name <- nameSetToList names ] }
; returnM (mkGlobalRdrEnv gres) }
-vanillaProv :: ModuleName -> Provenance
+vanillaProv :: Module -> Provenance
-- We're building a GlobalRdrEnv as if the user imported
-- all the specified modules into the global interactive module
vanillaProv mod = Imported [ImportSpec mod mod False
getModuleContents
:: HscEnv
-> InteractiveContext
- -> ModuleName -- Module to inspect
+ -> Module -- Module to inspect
-> Bool -- Grab just the exports, or the whole toplev
-> IO (Maybe [IfaceDecl])
| not exports_only -- We want the whole top-level type env
-- so it had better be a home module
= do { hpt <- getHpt
- ; case lookupModuleEnvByName hpt mod of
+ ; case lookupModuleEnv hpt mod of
Just mod_info -> return (map toIfaceDecl $
filter wantToSee $
typeEnvElts $
| otherwise -- Want the exports only
= do { iface <- load_iface mod
- ; avails <- exportsToAvails (mi_exports iface)
- ; mappM get_decl avails
+ ; mappM get_decl [ (mod,avail) | (mod, avails) <- mi_exports iface
+ , avail <- avails ]
}
- get_decl avail
- = do { thing <- tcLookupGlobal (availName avail)
- ; return (filter_decl (availOccs avail) (toIfaceDecl thing)) }
+ get_decl (mod, avail)
+ = do { main_name <- lookupOrig mod (availName avail)
+ ; thing <- tcLookupGlobal main_name
+ ; return (filter_decl (availNames avail) (toIfaceDecl thing)) }
---------------------
filter_decl occs decl@(IfaceClass {ifSigs = sigs})
keep_sig occs (IfaceClassOp occ _ _) = occ `elem` occs
keep_con occs con = ifConOcc con `elem` occs
-availOccs avail = map nameOccName (availNames avail)
-
wantToSee (AnId id) = not (isImplicitId id)
wantToSee (ADataCon _) = False -- They'll come via their TyCon
wantToSee _ = True
emptyNameSet -- Show data cons
ext_nm (munge thing)
where
- ext_nm n = ExtPkg (nameModuleName n) (nameOccName n)
+ ext_nm n = ExtPkg (nameModule n) (nameOccName n)
-- munge transforms a thing to it's "parent" thing
munge (ADataCon dc) = ATyCon (dataConTyCon dc)
projects / ghc-hetmet.git / blobdiff