X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fiface%2FLoadIface.lhs;h=27f6cdda0610712051a5d65a3be58aed9834696e;hb=9ffadf219cbc4f8ec57264786df936a3cee88aec;hp=66cdf7881a48fdca62d99fb81874b409e2a143c8;hpb=cb8f0e566e65c1e54de43174668fa3531970c8f5;p=ghc-hetmet.git diff --git a/compiler/iface/LoadIface.lhs b/compiler/iface/LoadIface.lhs index 66cdf78..27f6cdd 100644 --- a/compiler/iface/LoadIface.lhs +++ b/compiler/iface/LoadIface.lhs @@ -8,7 +8,7 @@ Loading interface files \begin{code} module LoadIface ( loadInterface, loadInterfaceForName, loadWiredInHomeIface, - loadSrcInterface, loadSysInterface, loadOrphanModules, + loadSrcInterface, loadSysInterface, loadUserInterface, loadOrphanModules, findAndReadIface, readIface, -- Used when reading the module's old interface loadDecls, -- Should move to TcIface and be renamed initExternalPackageState, @@ -19,7 +19,7 @@ module LoadIface ( #include "HsVersions.h" import {-# SOURCE #-} TcIface( tcIfaceDecl, tcIfaceRules, tcIfaceInst, - tcIfaceFamInst, tcIfaceVectInfo ) + tcIfaceFamInst, tcIfaceVectInfo, tcIfaceAnnotations ) import DynFlags import IfaceSyn @@ -34,6 +34,7 @@ import PrelNames import PrelInfo import PrelRules import Rules +import Annotations import InstEnv import FamInstEnv import Name @@ -70,15 +71,20 @@ import Data.Maybe \begin{code} -- | Load the interface corresponding to an @import@ directive in -- source code. On a failure, fail in the monad with an error message. -loadSrcInterface :: SDoc -> ModuleName -> IsBootInterface -> RnM ModIface -loadSrcInterface doc mod want_boot = do +loadSrcInterface :: SDoc + -> ModuleName + -> IsBootInterface -- {-# SOURCE #-} ? + -> Maybe FastString -- "package", if any + -> RnM ModIface + +loadSrcInterface doc mod want_boot maybe_pkg = do -- We must first find which Module this import refers to. This involves -- calling the Finder, which as a side effect will search the filesystem -- and create a ModLocation. If successful, loadIface will read the -- interface; it will call the Finder again, but the ModLocation will be -- cached from the first search. hsc_env <- getTopEnv - res <- liftIO $ findImportedModule hsc_env mod Nothing + res <- liftIO $ findImportedModule hsc_env mod maybe_pkg case res of Found _ mod -> do mb_iface <- initIfaceTcRn $ loadInterface doc mod (ImportByUser want_boot) @@ -115,12 +121,13 @@ loadInterfaceForName doc name { this_mod <- getModule ; MASSERT2( not (nameIsLocalOrFrom this_mod name), ppr name <+> parens doc ) } - ; initIfaceTcRn $ loadSysInterface doc (nameModule name) + ; ASSERT2( isExternalName name, ppr name ) + initIfaceTcRn $ loadSysInterface doc (nameModule name) } -- | An 'IfM' function to load the home interface for a wired-in thing, -- so that we're sure that we see its instance declarations and rules --- See Note [Loading instances] +-- See Note [Loading instances for wired-in things] in TcIface loadWiredInHomeIface :: Name -> IfM lcl () loadWiredInHomeIface name = ASSERT( isWiredInName name ) @@ -128,36 +135,24 @@ loadWiredInHomeIface name where doc = ptext (sLit "Need home interface for wired-in thing") <+> ppr name --- | A wrapper for 'loadInterface' that throws an exception if it fails +-- | Loads a system interface and throws an exception if it fails loadSysInterface :: SDoc -> Module -> IfM lcl ModIface -loadSysInterface doc mod_name - = do { mb_iface <- loadInterface doc mod_name ImportBySystem +loadSysInterface doc mod_name = loadInterfaceWithException doc mod_name ImportBySystem + +-- | Loads a user interface and throws an exception if it fails. The first parameter indicates +-- whether we should import the boot variant of the module +loadUserInterface :: Bool -> SDoc -> Module -> IfM lcl ModIface +loadUserInterface is_boot doc mod_name = loadInterfaceWithException doc mod_name (ImportByUser is_boot) + +-- | A wrapper for 'loadInterface' that throws an exception if it fails +loadInterfaceWithException :: SDoc -> Module -> WhereFrom -> IfM lcl ModIface +loadInterfaceWithException doc mod_name where_from + = do { mb_iface <- loadInterface doc mod_name where_from ; case mb_iface of Failed err -> ghcError (ProgramError (showSDoc err)) Succeeded iface -> return iface } \end{code} -Note [Loading instances] -~~~~~~~~~~~~~~~~~~~~~~~~ -We need to make sure that we have at least *read* the interface files -for any module with an instance decl or RULE that we might want. - -* If the instance decl is an orphan, we have a whole separate mechanism - (loadOprhanModules) - -* If the instance decl not an orphan, then the act of looking at the - TyCon or Class will force in the defining module for the - TyCon/Class, and hence the instance decl - -* BUT, if the TyCon is a wired-in TyCon, we don't really need its interface; - but we must make sure we read its interface in case it has instances or - rules. That is what LoadIface.loadWiredInHomeInterface does. It's called - from TcIface.{tcImportDecl, checkWiredInTyCon, ifCHeckWiredInThing} - -All of this is done by the type checker. The renamer plays no role. -(It used to, but no longer.) - - %********************************************************* %* * @@ -226,14 +221,15 @@ loadInterface doc_str mod from ; return (Failed err) } ; -- Found and parsed! - Succeeded (iface, file_path) -- Sanity check: - | ImportBySystem <- from, -- system-importing... - modulePackageId (mi_module iface) == thisPackage dflags, - -- a home-package module... - Nothing <- mb_dep -- that we know nothing about - -> return (Failed (badDepMsg mod)) - - | otherwise -> + -- We used to have a sanity check here that looked for: + -- * System importing .. + -- * a home package module .. + -- * that we know nothing about (mb_dep == Nothing)! + -- + -- But this is no longer valid because thNameToGhcName allows users to + -- cause the system to load arbitrary interfaces (by supplying an appropriate + -- Template Haskell original-name). + Succeeded (iface, file_path) -> let loc_doc = text file_path @@ -261,6 +257,7 @@ loadInterface doc_str mod from ; new_eps_insts <- mapM tcIfaceInst (mi_insts iface) ; new_eps_fam_insts <- mapM tcIfaceFamInst (mi_fam_insts iface) ; new_eps_rules <- tcIfaceRules ignore_prags (mi_rules iface) + ; new_eps_anns <- tcIfaceAnnotations (mi_anns iface) ; new_eps_vect_info <- tcIfaceVectInfo mod (mkNameEnv new_eps_decls) (mi_vect_info iface) @@ -268,7 +265,8 @@ loadInterface doc_str mod from mi_decls = panic "No mi_decls in PIT", mi_insts = panic "No mi_insts in PIT", mi_fam_insts = panic "No mi_fam_insts in PIT", - mi_rules = panic "No mi_rules in PIT" + mi_rules = panic "No mi_rules in PIT", + mi_anns = panic "No mi_anns in PIT" } } @@ -284,6 +282,8 @@ loadInterface doc_str mod from new_eps_fam_insts, eps_vect_info = plusVectInfo (eps_vect_info eps) new_eps_vect_info, + eps_ann_env = extendAnnEnvList (eps_ann_env eps) + new_eps_anns, eps_mod_fam_inst_env = let fam_inst_env = @@ -301,11 +301,16 @@ loadInterface doc_str mod from ; return (Succeeded final_iface) }}}} +{- +Used to be used for the loadInterface sanity check on system imports. That has been removed, but I'm leaving this in pending +review of this decision by SPJ - MCB 10/2008 + badDepMsg :: Module -> SDoc badDepMsg mod = hang (ptext (sLit "Interface file inconsistency:")) 2 (sep [ptext (sLit "home-package module") <+> quotes (ppr mod) <+> ptext (sLit "is needed,"), ptext (sLit "but is not listed in the dependencies of the interfaces directly imported by the module being compiled")]) +-} ----------------------------------------------------- -- Loading type/class/value decls @@ -475,6 +480,9 @@ findAndReadIface doc_str mod hi_boot_file -- Found file, so read it { let { file_path = addBootSuffix_maybe hi_boot_file (ml_hi_file loc) } + -- If the interface is in the current package then if we could + -- load it would already be in the HPT and we assume that our + -- callers checked that. ; if thisPackage dflags == modulePackageId mod && not (isOneShot (ghcMode dflags)) then return (Failed (homeModError mod loc)) @@ -544,6 +552,7 @@ initExternalPackageState eps_mod_fam_inst_env = emptyModuleEnv, eps_vect_info = noVectInfo, + eps_ann_env = emptyAnnEnv, eps_stats = EpsStats { n_ifaces_in = 0, n_decls_in = 0, n_decls_out = 0 , n_insts_in = 0, n_insts_out = 0 , n_rules_in = length builtinRules, n_rules_out = 0 } @@ -630,6 +639,7 @@ pprModIface iface , vcat (map pprExport (mi_exports iface)) , pprDeps (mi_deps iface) , vcat (map pprUsage (mi_usages iface)) + , vcat (map pprIfaceAnnotation (mi_anns iface)) , pprFixities (mi_fixities iface) , vcat (map pprIfaceDecl (mi_decls iface)) , vcat (map ppr (mi_insts iface)) @@ -718,6 +728,10 @@ pprWarns (WarnAll txt) = ptext (sLit "Warn all") <+> ppr txt pprWarns (WarnSome prs) = ptext (sLit "Warnings") <+> vcat (map pprWarning prs) where pprWarning (name, txt) = ppr name <+> ppr txt + +pprIfaceAnnotation :: IfaceAnnotation -> SDoc +pprIfaceAnnotation (IfaceAnnotation { ifAnnotatedTarget = target, ifAnnotatedValue = serialized }) + = ppr target <+> ptext (sLit "annotated by") <+> ppr serialized \end{code}