+%
+% (c) The University of Glasgow 2006
+%
+
\begin{code}
module TcRnMonad(
module TcRnMonad,
import TcRnTypes -- Re-export all
import IOEnv -- Re-export all
-#if defined(GHCI) && defined(BREAKPOINT)
-import TypeRep ( Type(..), liftedTypeKind, TyThing(..) )
-import Var ( mkTyVar, mkGlobalId )
-import IdInfo ( GlobalIdDetails(..), vanillaIdInfo )
-import OccName ( mkOccName, tvName )
-import SrcLoc ( noSrcLoc )
-import TysWiredIn ( intTy, stringTy, mkListTy, unitTy )
-import PrelNames ( breakpointJumpName )
-import NameEnv ( mkNameEnv )
-#endif
-
-import HsSyn ( emptyLHsBinds )
-import HscTypes ( HscEnv(..), ModGuts(..), ModIface(..),
- TyThing, TypeEnv, emptyTypeEnv, HscSource(..),
- isHsBoot, ModSummary(..),
- ExternalPackageState(..), HomePackageTable,
- Deprecs(..), FixityEnv, FixItem,
- lookupType, unQualInScope )
-import Module ( Module, unitModuleEnv )
-import RdrName ( GlobalRdrEnv, emptyGlobalRdrEnv,
- LocalRdrEnv, emptyLocalRdrEnv )
-import Name ( Name, isInternalName, mkInternalName, tidyNameOcc, nameOccName, getSrcLoc )
-import Type ( Type )
-import TcType ( tcIsTyVarTy, tcGetTyVar )
-import NameEnv ( extendNameEnvList, nameEnvElts )
-import InstEnv ( emptyInstEnv )
-
-import Var ( setTyVarName )
-import VarSet ( emptyVarSet )
-import VarEnv ( TidyEnv, emptyTidyEnv, extendVarEnv )
-import ErrUtils ( Message, Messages, emptyMessages, errorsFound,
- mkWarnMsg, printErrorsAndWarnings,
- mkLocMessage, mkLongErrMsg )
-import Packages ( mkHomeModules )
-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 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, splitUniqSupply )
-import Unique ( Unique )
-import DynFlags ( DynFlags(..), DynFlag(..), dopt, dopt_set, GhcMode )
-import StaticFlags ( opt_PprStyle_Debug )
-import Bag ( snocBag, unionBags )
-import Panic ( showException )
+import UniqSupply
+import Unique
+import DynFlags
+import StaticFlags
+import FastString
+import Panic
-import IO ( stderr )
-import DATA_IOREF ( newIORef, readIORef )
-import EXCEPTION ( Exception )
+import System.IO
+import Data.IORef
+import Control.Exception
\end{code}
\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 ;
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 = emptyGlobalRdrEnv,
- tcg_fix_env = emptyNameEnv,
- tcg_default = Nothing,
- tcg_type_env = emptyNameEnv,
+ 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_home_mods = home_mods,
+ 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,
-- OK, here's the business end!
maybe_res <- initTcRnIf 'a' hsc_env gbl_env lcl_env $
- do {
-#if defined(GHCI) && defined(BREAKPOINT)
- unique <- newUnique ;
- let { var = mkInternalName unique (mkOccName tvName "a") noSrcLoc;
- tyvar = mkTyVar var liftedTypeKind;
- breakpointJumpType = mkGlobalId
- (VanillaGlobal)
- (breakpointJumpName)
- (FunTy intTy
- (FunTy (mkListTy unitTy)
- (FunTy stringTy
- (ForAllTy tyvar
- (FunTy (TyVarTy tyvar)
- (TyVarTy tyvar))))))
- (vanillaIdInfo);
- new_env = mkNameEnv [(breakpointJumpName,AGlobal (AnId breakpointJumpType))];
- };
- r <- tryM (updLclEnv (\gbl -> gbl{tcl_env=new_env}) do_this)
-#else
- r <- tryM do_this
-#endif
+ do { r <- tryM do_this
; case r of
Right res -> return (Just res)
Left _ -> return Nothing } ;
return (msgs, final_res)
}
- where
- home_mods = mkHomeModules (map ms_mod (hsc_mod_graph hsc_env))
- -- A guess at the home modules. This will be correct in
- -- --make and GHCi modes, but in one-shot mode we need to
- -- fix it up after we know the real dependencies of the current
- -- module (see tcRnModule).
- -- Setting it here is necessary for the typechecker entry points
- -- other than tcRnModule: tcRnGetInfo, for example. These are
- -- all called via the GHC module, so hsc_mod_graph will contain
- -- something sensible.
-
- init_imports = emptyImportAvails {imp_env = unitModuleEnv 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
-> 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
-
--- mkImpTypeEnv makes the imported symbol table
-mkImpTypeEnv :: ExternalPackageState -> HomePackageTable
- -> Name -> Maybe TyThing
-mkImpTypeEnv pcs hpt = lookup
- where
- pte = eps_PTE pcs
- lookup name | isInternalName name = Nothing
- | otherwise = lookupType hpt pte name
\end{code}
-
%************************************************************************
%* *
Initialisation
setOptM flag = updEnv (\ env@(Env { env_top = top }) ->
env { env_top = top { hsc_dflags = dopt_set (hsc_dflags top) flag}} )
+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
ifOptM flag thing_inside = do { b <- doptM flag;
if b then thing_inside else return () }
\begin{code}
newUnique :: TcRnIf gbl lcl Unique
-newUnique = do { us <- newUniqueSupply ;
- return (uniqFromSupply us) }
+newUnique
+ = do { env <- getEnv ;
+ let { u_var = env_us env } ;
+ us <- readMutVar u_var ;
+ case splitUniqSupply us of { (us1,_) -> do {
+ writeMutVar u_var us1 ;
+ return $! uniqFromSupply us }}}
+ -- NOTE 1: we strictly split the supply, to avoid the possibility of leaving
+ -- a chain of unevaluated supplies behind.
+ -- NOTE 2: we use the uniq in the supply from the MutVar directly, and
+ -- throw away one half of the new split supply. This is safe because this
+ -- is the only place we use that unique. Using the other half of the split
+ -- supply is safer, but slower.
newUniqueSupply :: TcRnIf gbl lcl UniqSupply
newUniqueSupply
= do { env <- getEnv ;
let { u_var = env_us env } ;
us <- readMutVar u_var ;
- let { (us1, us2) = splitUniqSupply us } ;
+ case splitUniqSupply us of { (us1,us2) -> do {
writeMutVar u_var us1 ;
- return us2 }
+ return us2 }}}
newLocalName :: Name -> TcRnIf gbl lcl Name
newLocalName name -- Make a clone
- = newUnique `thenM` \ uniq ->
- returnM (mkInternalName uniq (nameOccName name) (getSrcLoc name))
+ = do { uniq <- newUnique
+ ; return (mkInternalName uniq (nameOccName name) (getSrcSpan name)) }
+
+newSysLocalIds :: FastString -> [TcType] -> TcRnIf gbl lcl [TcId]
+newSysLocalIds fs tys
+ = do { us <- newUniqueSupply
+ ; return (zipWith (mkSysLocal fs) (uniqsFromSupply us) tys) }
\end{code}
dumpTcRn :: SDoc -> TcRn ()
dumpTcRn doc = do { rdr_env <- getGlobalRdrEnv ;
- ioToTcRn (printForUser stderr (unQualInScope rdr_env) doc) }
+ ioToTcRn (printForUser stderr (mkPrintUnqualified rdr_env) doc) }
dumpOptTcRn :: DynFlag -> SDoc -> TcRn ()
dumpOptTcRn flag doc = ifOptM flag (dumpTcRn doc)
= 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}
%************************************************************************
= do { traceTc (ptext SLIT("Adding error:") <+> (mkLocMessage loc (msg $$ extra))) ;
errs_var <- getErrsVar ;
rdr_env <- getGlobalRdrEnv ;
- let { err = mkLongErrMsg loc (unQualInScope rdr_env) msg extra } ;
+ let { err = mkLongErrMsg loc (mkPrintUnqualified rdr_env) msg extra } ;
(warns, errs) <- readMutVar errs_var ;
writeMutVar errs_var (warns, errs `snocBag` err) }
addReportAt loc msg
= do { errs_var <- getErrsVar ;
rdr_env <- getGlobalRdrEnv ;
- let { warn = mkWarnMsg loc (unQualInScope rdr_env) msg } ;
+ let { warn = mkWarnMsg loc (mkPrintUnqualified rdr_env) msg } ;
(warns, errs) <- readMutVar errs_var ;
writeMutVar errs_var (warns `snocBag` warn, errs) }
\begin{code}
addWarnTc :: Message -> TcM ()
-addWarnTc msg
+addWarnTc msg = do { env0 <- tcInitTidyEnv
+ ; addWarnTcM (env0, msg) }
+
+addWarnTcM :: (TidyEnv, Message) -> TcM ()
+addWarnTcM (env0, msg)
= do { ctxt <- getErrCtxt ;
- env0 <- tcInitTidyEnv ;
ctxt_msgs <- do_ctxt env0 ctxt ;
- addWarn (vcat (msg : ctxt_to_use ctxt_msgs)) }
+ addReport (vcat (ptext SLIT("Warning:") <+> msg : ctxt_to_use ctxt_msgs)) }
warnTc :: Bool -> Message -> TcM ()
warnTc warn_if_true warn_msg
forkM_maybe doc thing_inside
= do { unsafeInterleaveM $
do { traceIf (text "Starting fork {" <+> doc)
- ; mb_res <- tryM thing_inside ;
- case mb_res of
+ ; mb_res <- tryM $
+ updLclEnv (\env -> env { if_loc = if_loc env $$ doc }) $
+ thing_inside
+ ; case mb_res of
Right r -> do { traceIf (text "} ending fork" <+> doc)
; return (Just r) }
Left exn -> do {
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