X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcRnMonad.lhs;h=dcba8084753937d94e613aab65f714337f9e6762;hp=3b7a2e8379f1028b39bc157f0636dd6ec946bc73;hb=72d043c04c1b0db0896e2c876a1544434f0428ec;hpb=00cc4d8773d1138f7b3b3ac122f3c98a6f93e68a diff --git a/compiler/typecheck/TcRnMonad.lhs b/compiler/typecheck/TcRnMonad.lhs index 3b7a2e8..dcba808 100644 --- a/compiler/typecheck/TcRnMonad.lhs +++ b/compiler/typecheck/TcRnMonad.lhs @@ -1,4 +1,15 @@ +% +% (c) The University of Glasgow 2006 +% + \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 TcRnMonad( module TcRnMonad, module TcRnTypes, @@ -10,59 +21,40 @@ module TcRnMonad( import TcRnTypes -- Re-export all import IOEnv -- Re-export all -#if defined(GHCI) && defined(BREAKPOINT) -import TypeRep ( Type(..), liftedTypeKind ) -import Var ( mkTyVar, mkGlobalId ) -import IdInfo ( GlobalIdDetails(..), vanillaIdInfo ) -import OccName ( mkOccName, tvName ) -import SrcLoc ( noSrcLoc ) -import TysWiredIn ( intTy, stringTy, mkListTy, unitTy, boolTy ) -import PrelNames ( breakpointJumpName, breakpointCondJumpName ) -import NameEnv ( mkNameEnv ) -import TcEnv ( tcExtendIdEnv ) -#endif - -import HsSyn ( emptyLHsBinds ) -import HscTypes ( HscEnv(..), ModGuts(..), ModIface(..), - TypeEnv, emptyTypeEnv, HscSource(..), isHsBoot, - ExternalPackageState(..), HomePackageTable, - Deprecs(..), FixityEnv, FixItem, - mkPrintUnqualified ) -import Module ( Module, moduleName ) -import RdrName ( GlobalRdrEnv, LocalRdrEnv, emptyLocalRdrEnv ) -import Name ( Name, mkInternalName, tidyNameOcc, nameOccName, getSrcLoc ) -import Type ( Type ) -import TcType ( TcType, tcIsTyVarTy, tcGetTyVar ) -import NameEnv ( extendNameEnvList, nameEnvElts ) -import InstEnv ( emptyInstEnv ) -import FamInstEnv ( emptyFamInstEnv ) - -import Var ( setTyVarName ) -import Id ( mkSysLocal ) -import VarSet ( emptyVarSet ) -import VarEnv ( TidyEnv, emptyTidyEnv, extendVarEnv ) -import ErrUtils ( Message, Messages, emptyMessages, errorsFound, - mkWarnMsg, printErrorsAndWarnings, - mkLocMessage, mkLongErrMsg ) -import SrcLoc ( mkGeneralSrcSpan, isGoodSrcSpan, SrcSpan, Located(..) ) -import NameEnv ( emptyNameEnv ) -import NameSet ( NameSet, emptyDUs, emptyNameSet, unionNameSets, addOneToNameSet ) -import OccName ( emptyOccEnv, tidyOccName ) -import Bag ( emptyBag ) +import HsSyn hiding (LIE) +import HscTypes +import Module +import RdrName +import Name +import TcType +import InstEnv +import FamInstEnv + +import Coercion +import Var +import Id +import VarSet +import VarEnv +import ErrUtils +import SrcLoc +import NameEnv +import NameSet +import OccName +import Bag import Outputable -import UniqSupply ( UniqSupply, mkSplitUniqSupply, uniqFromSupply, uniqsFromSupply, splitUniqSupply ) -import UniqFM ( unitUFM ) -import Unique ( Unique ) -import DynFlags ( DynFlags(..), DynFlag(..), dopt, dopt_set, - dopt_unset, GhcMode ) -import StaticFlags ( opt_PprStyle_Debug ) -import FastString ( FastString ) -import Bag ( snocBag, unionBags ) -import Panic ( showException ) +import UniqSupply +import Unique +import LazyUniqFM +import DynFlags +import StaticFlags +import FastString +import Panic +import Util -import IO ( stderr ) -import DATA_IOREF ( newIORef, readIORef ) -import EXCEPTION ( Exception ) +import System.IO +import Data.IORef +import Control.Exception +import Control.Monad \end{code} @@ -74,20 +66,17 @@ import EXCEPTION ( Exception ) %************************************************************************ \begin{code} -ioToTcRn :: IO r -> TcRn r -ioToTcRn = ioToIOEnv -\end{code} -\begin{code} initTc :: HscEnv -> HscSource + -> Bool -- True <=> retain renamed syntax trees -> Module -> TcM r -> IO (Messages, Maybe r) -- Nothing => error thrown by the thing inside -- (error messages should have been printed already) -initTc hsc_env hsc_src mod do_this +initTc hsc_env hsc_src keep_rn_syntax mod do_this = do { errs_var <- newIORef (emptyBag, emptyBag) ; tvs_var <- newIORef emptyVarSet ; type_env_var <- newIORef emptyNameEnv ; @@ -96,31 +85,42 @@ initTc hsc_env hsc_src mod do_this th_var <- newIORef False ; dfun_n_var <- newIORef 1 ; let { + maybe_rn_syntax empty_val + | keep_rn_syntax = Just empty_val + | otherwise = Nothing ; + gbl_env = TcGblEnv { - tcg_mod = mod, - tcg_src = hsc_src, - tcg_rdr_env = hsc_global_rdr_env hsc_env, - tcg_fix_env = emptyNameEnv, - tcg_default = Nothing, - tcg_type_env = hsc_global_type_env hsc_env, + tcg_mod = mod, + tcg_src = hsc_src, + tcg_rdr_env = hsc_global_rdr_env hsc_env, + tcg_fix_env = emptyNameEnv, + tcg_field_env = emptyNameEnv, + tcg_default = Nothing, + tcg_type_env = hsc_global_type_env hsc_env, tcg_type_env_var = type_env_var, tcg_inst_env = emptyInstEnv, tcg_fam_inst_env = emptyFamInstEnv, tcg_inst_uses = dfuns_var, tcg_th_used = th_var, - tcg_exports = emptyNameSet, - tcg_imports = init_imports, + tcg_exports = [], + tcg_imports = emptyImportAvails, tcg_dus = emptyDUs, - tcg_rn_imports = Nothing, - tcg_rn_exports = Nothing, - tcg_rn_decls = Nothing, + + tcg_rn_imports = maybe_rn_syntax [], + tcg_rn_exports = maybe_rn_syntax [], + tcg_rn_decls = maybe_rn_syntax emptyRnGroup, + tcg_binds = emptyLHsBinds, tcg_deprecs = NoDeprecs, tcg_insts = [], + tcg_fam_insts= [], tcg_rules = [], tcg_fords = [], tcg_dfun_n = dfun_n_var, - tcg_keep = keep_var + tcg_keep = keep_var, + tcg_doc = Nothing, + tcg_hmi = HaddockModInfo Nothing Nothing Nothing Nothing, + tcg_hpc = False } ; lcl_env = TcLclEnv { tcl_errs = errs_var, @@ -137,7 +137,6 @@ initTc hsc_env hsc_src mod do_this -- OK, here's the business end! maybe_res <- initTcRnIf 'a' hsc_env gbl_env lcl_env $ - addBreakpointBindings $ do { r <- tryM do_this ; case r of Right res -> return (Just res) @@ -152,13 +151,6 @@ initTc hsc_env hsc_src mod do_this return (msgs, final_res) } - where - init_imports = emptyImportAvails {imp_env = - unitUFM (moduleName mod) emptyNameSet} - -- Initialise tcg_imports with an empty set of bindings for - -- this module, so that if we see 'module M' in the export - -- list, and there are no bindings in M, we don't bleat - -- "unknown module M". initTcPrintErrors -- Used from the interactive loop only :: HscEnv @@ -166,38 +158,11 @@ initTcPrintErrors -- Used from the interactive loop only -> TcM r -> IO (Maybe r) initTcPrintErrors env mod todo = do - (msgs, res) <- initTc env HsSrcFile mod todo + (msgs, res) <- initTc env HsSrcFile False mod todo printErrorsAndWarnings (hsc_dflags env) msgs return res \end{code} -\begin{code} -addBreakpointBindings :: TcM a -> TcM a -addBreakpointBindings thing_inside -#if defined(GHCI) && defined(BREAKPOINT) - = do { unique <- newUnique - ; let { var = mkInternalName unique (mkOccName tvName "a") noSrcLoc; - tyvar = mkTyVar var liftedTypeKind; - basicType extra = (FunTy intTy - (FunTy (mkListTy unitTy) - (FunTy stringTy - (ForAllTy tyvar - (extra - (FunTy (TyVarTy tyvar) - (TyVarTy tyvar))))))); - breakpointJumpId - = mkGlobalId VanillaGlobal breakpointJumpName - (basicType id) vanillaIdInfo; - breakpointCondJumpId - = mkGlobalId VanillaGlobal breakpointCondJumpName - (basicType (FunTy boolTy)) vanillaIdInfo - } - ; tcExtendIdEnv [breakpointJumpId, breakpointCondJumpId] thing_inside} -#else - = thing_inside -#endif -\end{code} - %************************************************************************ %* * Initialisation @@ -218,7 +183,7 @@ initTcRnIf uniq_tag hsc_env gbl_env lcl_env thing_inside ; let { env = Env { env_top = hsc_env, env_us = us_var, env_gbl = gbl_env, - env_lcl = lcl_env } } + env_lcl = lcl_env} } ; runIOEnv env thing_inside } @@ -279,7 +244,8 @@ unsetOptM :: DynFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a unsetOptM flag = updEnv (\ env@(Env { env_top = top }) -> env { env_top = top { hsc_dflags = dopt_unset (hsc_dflags top) flag}} ) -ifOptM :: DynFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl () -- Do it flag is true +-- | Do it flag is true +ifOptM :: DynFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl () ifOptM flag thing_inside = do { b <- doptM flag; if b then thing_inside else return () } @@ -360,7 +326,7 @@ newUniqueSupply newLocalName :: Name -> TcRnIf gbl lcl Name newLocalName name -- Make a clone = do { uniq <- newUnique - ; return (mkInternalName uniq (nameOccName name) (getSrcLoc name)) } + ; return (mkInternalName uniq (nameOccName name) (getSrcSpan name)) } newSysLocalIds :: FastString -> [TcType] -> TcRnIf gbl lcl [TcId] newSysLocalIds fs tys @@ -389,7 +355,7 @@ traceHiDiffs = traceOptIf Opt_D_dump_hi_diffs traceOptIf :: DynFlag -> SDoc -> TcRnIf m n () -- No RdrEnv available, so qualify everything traceOptIf flag doc = ifOptM flag $ - ioToIOEnv (printForUser stderr alwaysQualify doc) + liftIO (printForUser stderr alwaysQualify doc) traceOptTcRn :: DynFlag -> SDoc -> TcRn () traceOptTcRn flag doc = ifOptM flag $ do @@ -402,7 +368,8 @@ traceOptTcRn flag doc = ifOptM flag $ do dumpTcRn :: SDoc -> TcRn () dumpTcRn doc = do { rdr_env <- getGlobalRdrEnv ; - ioToTcRn (printForUser stderr (mkPrintUnqualified rdr_env) doc) } + dflags <- getDOpts ; + liftIO (printForUser stderr (mkPrintUnqualified dflags rdr_env) doc) } dumpOptTcRn :: DynFlag -> SDoc -> TcRn () dumpOptTcRn flag doc = ifOptM flag (dumpTcRn doc) @@ -428,6 +395,9 @@ tcIsHsBoot = do { env <- getGblEnv; return (isHsBoot (tcg_src env)) } getGlobalRdrEnv :: TcRn GlobalRdrEnv getGlobalRdrEnv = do { env <- getGblEnv; return (tcg_rdr_env env) } +getRdrEnvs :: TcRn (GlobalRdrEnv, LocalRdrEnv) +getRdrEnvs = do { (gbl,lcl) <- getEnvs; return (tcg_rdr_env gbl, tcl_rdr lcl) } + getImports :: TcRn ImportAvails getImports = do { env <- getGblEnv; return (tcg_imports env) } @@ -439,8 +409,16 @@ extendFixityEnv new_bit = updGblEnv (\env@(TcGblEnv { tcg_fix_env = old_fix_env }) -> env {tcg_fix_env = extendNameEnvList old_fix_env new_bit}) -getDefaultTys :: TcRn (Maybe [Type]) -getDefaultTys = do { env <- getGblEnv; return (tcg_default env) } +getRecFieldEnv :: TcRn RecFieldEnv +getRecFieldEnv = do { env <- getGblEnv; return (tcg_field_env env) } + +extendRecFieldEnv :: RecFieldEnv -> RnM a -> RnM a +extendRecFieldEnv new_bit + = updGblEnv (\env@(TcGblEnv { tcg_field_env = old_env }) -> + env {tcg_field_env = old_env `plusNameEnv` new_bit}) + +getDeclaredDefaultTys :: TcRn (Maybe [Type]) +getDeclaredDefaultTys = do { env <- getGblEnv; return (tcg_default env) } \end{code} %************************************************************************ @@ -500,12 +478,13 @@ addLongErrAt loc msg extra = do { traceTc (ptext SLIT("Adding error:") <+> (mkLocMessage loc (msg $$ extra))) ; errs_var <- getErrsVar ; rdr_env <- getGlobalRdrEnv ; - let { err = mkLongErrMsg loc (mkPrintUnqualified rdr_env) msg extra } ; + dflags <- getDOpts ; + let { err = mkLongErrMsg loc (mkPrintUnqualified dflags rdr_env) msg extra } ; (warns, errs) <- readMutVar errs_var ; writeMutVar errs_var (warns, errs `snocBag` err) } addErrs :: [(SrcSpan,Message)] -> TcRn () -addErrs msgs = mappM_ add msgs +addErrs msgs = mapM_ add msgs where add (loc,msg) = addErrAt loc msg @@ -516,7 +495,8 @@ addReportAt :: SrcSpan -> Message -> TcRn () addReportAt loc msg = do { errs_var <- getErrsVar ; rdr_env <- getGlobalRdrEnv ; - let { warn = mkWarnMsg loc (mkPrintUnqualified rdr_env) msg } ; + dflags <- getDOpts ; + let { warn = mkWarnMsg loc (mkPrintUnqualified dflags rdr_env) msg } ; (warns, errs) <- readMutVar errs_var ; writeMutVar errs_var (warns `snocBag` warn, errs) } @@ -531,7 +511,7 @@ addLocWarn (L loc e) fn = addReportAt loc (fn e) checkErr :: Bool -> Message -> TcRn () -- Add the error if the bool is False -checkErr ok msg = checkM ok (addErr msg) +checkErr ok msg = unless ok (addErr msg) warnIf :: Bool -> Message -> TcRn () warnIf True msg = addWarn msg @@ -580,7 +560,20 @@ recoverM recover thing = do { mb_res <- try_m thing ; case mb_res of Left exn -> recover - Right res -> returnM res } + Right res -> return res } + + +----------------------- +mapAndRecoverM :: (a -> TcRn b) -> [a] -> TcRn [b] +-- Drop elements of the input that fail, so the result +-- list can be shorter than the argument list +mapAndRecoverM f [] = return [] +mapAndRecoverM f (x:xs) = do { mb_r <- tryM (f x) + ; rs <- mapAndRecoverM f xs + ; return (case mb_r of + Left _ -> rs + Right r -> r:rs) } + ----------------------- tryTc :: TcRn a -> TcRn (Messages, Maybe a) @@ -654,7 +647,7 @@ checkNoErrs main = do { (msgs, mb_res) <- tryTcLIE main ; addMessages msgs ; case mb_res of - Nothing -> failM + Nothing -> failM Just val -> return val } @@ -692,7 +685,7 @@ setErrCtxt :: ErrCtxt -> TcM a -> TcM a setErrCtxt ctxt = updLclEnv (\ env -> env { tcl_ctxt = ctxt }) addErrCtxt :: Message -> TcM a -> TcM a -addErrCtxt msg = addErrCtxtM (\env -> returnM (env, msg)) +addErrCtxt msg = addErrCtxtM (\env -> return (env, msg)) addErrCtxtM :: (TidyEnv -> TcM (TidyEnv, Message)) -> TcM a -> TcM a addErrCtxtM msg = updCtxt (\ msgs -> msg : msgs) @@ -732,7 +725,7 @@ addErrTc err_msg = do { env0 <- tcInitTidyEnv ; addErrTcM (env0, err_msg) } addErrsTc :: [Message] -> TcM () -addErrsTc err_msgs = mappM_ addErrTc err_msgs +addErrsTc err_msgs = mapM_ addErrTc err_msgs addErrTcM :: (TidyEnv, Message) -> TcM () addErrTcM (tidy_env, err_msg) @@ -753,7 +746,7 @@ failWithTcM local_and_msg = addErrTcM local_and_msg >> failM checkTc :: Bool -> Message -> TcM () -- Check that the boolean is true -checkTc True err = returnM () +checkTc True err = return () checkTc False err = failWithTc err \end{code} @@ -761,11 +754,14 @@ checkTc False err = failWithTc err \begin{code} addWarnTc :: Message -> TcM () -addWarnTc msg +addWarnTc msg = do { env0 <- tcInitTidyEnv + ; addWarnTcM (env0, msg) } + +addWarnTcM :: (TidyEnv, Message) -> TcM () +addWarnTcM (env0, msg) = do { ctxt <- getErrCtxt ; - env0 <- tcInitTidyEnv ; ctxt_msgs <- do_ctxt env0 ctxt ; - addWarn (vcat (msg : ctxt_to_use ctxt_msgs)) } + addReport (vcat (ptext SLIT("Warning:") <+> msg : ctxt_to_use ctxt_msgs)) } warnTc :: Bool -> Message -> TcM () warnTc warn_if_true warn_msg @@ -820,11 +816,9 @@ debugTc is useful for monadic debugging code \begin{code} debugTc :: TcM () -> TcM () -#ifdef DEBUG -debugTc thing = thing -#else -debugTc thing = return () -#endif +debugTc thing + | debugIsOn = thing + | otherwise = return () \end{code} %************************************************************************ @@ -864,7 +858,7 @@ extendLIE inst extendLIEs :: [Inst] -> TcM () extendLIEs [] - = returnM () + = return () extendLIEs insts = do { lie_var <- getLIEVar ; lie <- readMutVar lie_var ; @@ -893,9 +887,11 @@ setLclTypeEnv lcl_env thing_inside recordThUse :: TcM () recordThUse = do { env <- getGblEnv; writeMutVar (tcg_th_used env) True } -keepAliveTc :: Name -> TcM () -- Record the name in the keep-alive set -keepAliveTc n = do { env <- getGblEnv; - ; updMutVar (tcg_keep env) (`addOneToNameSet` n) } +keepAliveTc :: Id -> TcM () -- Record the name in the keep-alive set +keepAliveTc id + | isLocalId id = do { env <- getGblEnv; + ; updMutVar (tcg_keep env) (`addOneToNameSet` idName id) } + | otherwise = return () keepAliveSetTc :: NameSet -> TcM () -- Record the name in the keep-alive set keepAliveSetTc ns = do { env <- getGblEnv; @@ -935,8 +931,8 @@ setLocalRdrEnv rdr_env thing_inside mkIfLclEnv :: Module -> SDoc -> IfLclEnv mkIfLclEnv mod loc = IfLclEnv { if_mod = mod, if_loc = loc, - if_tv_env = emptyOccEnv, - if_id_env = emptyOccEnv } + if_tv_env = emptyUFM, + if_id_env = emptyUFM } initIfaceTcRn :: IfG a -> TcRn a initIfaceTcRn thing_inside @@ -1007,7 +1003,7 @@ failIfM :: Message -> IfL a failIfM msg = do { env <- getLclEnv ; let full_msg = (if_loc env <> colon) $$ nest 2 msg - ; ioToIOEnv (printErrs (full_msg defaultErrStyle)) + ; liftIO (printErrs (full_msg defaultErrStyle)) ; failM } -------------------- @@ -1042,7 +1038,7 @@ forkM_maybe doc thing_inside ; return Nothing } }} where - print_errs sdoc = ioToIOEnv (printErrs (sdoc defaultErrStyle)) + print_errs sdoc = liftIO (printErrs (sdoc defaultErrStyle)) forkM :: SDoc -> IfL a -> IfL a forkM doc thing_inside @@ -1052,5 +1048,3 @@ forkM doc thing_inside -- pprPanic "forkM" doc Just r -> r) } \end{code} - -