import HsSyn ( emptyLHsBinds )
import HscTypes ( HscEnv(..), ModGuts(..), ModIface(..),
- TyThing, TypeEnv, emptyTypeEnv, HscSource(..), isHsBoot,
+ 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 )
+import Name ( Name, isInternalName, mkInternalName, getOccName, getSrcLoc )
import Type ( Type )
import NameEnv ( extendNameEnvList )
import InstEnv ( emptyInstEnv )
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 Bag ( snocBag, unionBags )
import Panic ( showException )
-import Maybe ( isJust )
import IO ( stderr )
import DATA_IOREF ( newIORef, readIORef )
import EXCEPTION ( Exception )
tcg_th_used = th_var,
tcg_exports = emptyNameSet,
tcg_imports = init_imports,
+ tcg_home_mods = home_mods,
tcg_dus = emptyDUs,
tcg_rn_decls = Nothing,
tcg_binds = emptyLHsBinds,
tcl_ctxt = [],
tcl_rdr = emptyLocalRdrEnv,
tcl_th_ctxt = topStage,
- tcl_arrow_ctxt = panic "initTc:arrow", -- only used inside proc
+ tcl_arrow_ctxt = NoArrowCtxt,
tcl_env = emptyNameEnv,
tcl_tyvars = tvs_var,
tcl_lie = panic "initTc:LIE", -- LIE only valid inside a getLIE
return (msgs, final_res)
}
where
- init_imports = emptyImportAvails { imp_env = unitModuleEnv mod emptyNameSet }
+ 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
-> IO (Maybe r)
initTcPrintErrors env mod todo = do
(msgs, res) <- initTc env HsSrcFile mod todo
- printErrorsAndWarnings msgs
+ printErrorsAndWarnings (hsc_dflags env) msgs
return res
-- mkImpTypeEnv makes the imported symbol table
let { (us1, us2) = splitUniqSupply us } ;
writeMutVar u_var us1 ;
return us2 }
+
+newLocalName :: Name -> TcRnIf gbl lcl Name
+newLocalName name -- Make a clone
+ = newUnique `thenM` \ uniq ->
+ returnM (mkInternalName uniq (getOccName name) (getSrcLoc name))
\end{code}
\begin{code}
traceTc, traceRn :: SDoc -> TcRn ()
-traceRn = dumpOptTcRn Opt_D_dump_rn_trace
-traceTc = dumpOptTcRn Opt_D_dump_tc_trace
-traceSplice = dumpOptTcRn Opt_D_dump_splices
+traceRn = traceOptTcRn Opt_D_dump_rn_trace
+traceTc = traceOptTcRn Opt_D_dump_tc_trace
+traceSplice = traceOptTcRn Opt_D_dump_splices
traceIf :: SDoc -> TcRnIf m n ()
-traceIf = dumpOptIf Opt_D_dump_if_trace
-traceHiDiffs = dumpOptIf Opt_D_dump_hi_diffs
+traceIf = traceOptIf Opt_D_dump_if_trace
+traceHiDiffs = traceOptIf Opt_D_dump_hi_diffs
-dumpOptIf :: DynFlag -> SDoc -> TcRnIf m n () -- No RdrEnv available, so qualify everything
-dumpOptIf flag doc = ifOptM flag $
+traceOptIf :: DynFlag -> SDoc -> TcRnIf m n () -- No RdrEnv available, so qualify everything
+traceOptIf flag doc = ifOptM flag $
ioToIOEnv (printForUser stderr alwaysQualify doc)
-dumpOptTcRn :: DynFlag -> SDoc -> TcRn ()
-dumpOptTcRn flag doc = ifOptM flag $ do
+traceOptTcRn :: DynFlag -> SDoc -> TcRn ()
+traceOptTcRn flag doc = ifOptM flag $ do
{ ctxt <- getErrCtxt
; loc <- getSrcSpanM
; ctxt_msgs <- do_ctxt emptyTidyEnv ctxt
dumpTcRn :: SDoc -> TcRn ()
dumpTcRn doc = do { rdr_env <- getGlobalRdrEnv ;
ioToTcRn (printForUser stderr (unQualInScope rdr_env) doc) }
+
+dumpOptTcRn :: DynFlag -> SDoc -> TcRn ()
+dumpOptTcRn flag doc = ifOptM flag (dumpTcRn doc)
\end{code}
addLongErrAt :: SrcSpan -> Message -> Message -> TcRn ()
addLongErrAt loc msg extra
- = do { errs_var <- getErrsVar ;
+ = 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 } ;
(warns, errs) <- readMutVar errs_var ;
\begin{code}
+try_m :: TcRn r -> TcRn (Either Exception r)
+-- Does try_m, with a debug-trace on failure
+try_m thing
+ = do { mb_r <- tryM thing ;
+ case mb_r of
+ Left exn -> do { traceTc (exn_msg exn); return mb_r }
+ Right r -> return mb_r }
+ where
+ exn_msg exn = text "tryTc/recoverM recovering from" <+> text (showException exn)
+
+-----------------------
recoverM :: TcRn r -- Recovery action; do this if the main one fails
-> TcRn r -- Main action: do this first
-> TcRn r
+-- Errors in 'thing' are retained
recoverM recover thing
= do { mb_res <- try_m thing ;
case mb_res of
Left exn -> recover
Right res -> returnM res }
+-----------------------
tryTc :: TcRn a -> TcRn (Messages, Maybe a)
- -- (tryTc m) executes m, and returns
- -- Just r, if m succeeds (returning r) and caused no errors
- -- Nothing, if m fails, or caused errors
- -- It also returns all the errors accumulated by m
- -- (even in the Just case, there might be warnings)
- --
- -- It always succeeds (never raises an exception)
+-- (tryTc m) executes m, and returns
+-- Just r, if m succeeds (returning r)
+-- Nothing, if m fails
+-- It also returns all the errors and warnings accumulated by m
+-- It always succeeds (never raises an exception)
tryTc m
= do { errs_var <- newMutVar emptyMessages ;
-
- mb_r <- try_m (setErrsVar errs_var m) ;
-
- new_errs <- readMutVar errs_var ;
-
- dflags <- getDOpts ;
-
- return (new_errs,
- case mb_r of
- Left exn -> Nothing
- Right r | errorsFound dflags new_errs -> Nothing
- | otherwise -> Just r)
+ res <- try_m (setErrsVar errs_var m) ;
+ msgs <- readMutVar errs_var ;
+ return (msgs, case res of
+ Left exn -> Nothing
+ Right val -> Just val)
+ -- The exception is always the IOEnv built-in
+ -- in exception; see IOEnv.failM
}
-try_m :: TcRn r -> TcRn (Either Exception r)
--- Does try_m, with a debug-trace on failure
-try_m thing
- = do { mb_r <- tryM thing ;
- case mb_r of
- Left exn -> do { traceTc (exn_msg exn); return mb_r }
- Right r -> return mb_r }
- where
- exn_msg exn = text "tryTc/recoverM recovering from" <+> text (showException exn)
+-----------------------
+tryTcErrs :: TcRn a -> TcRn (Messages, Maybe a)
+-- Run the thing, returning
+-- Just r, if m succceeds with no error messages
+-- Nothing, if m fails, or if it succeeds but has error messages
+-- Either way, the messages are returned; even in the Just case
+-- there might be warnings
+tryTcErrs thing
+ = do { (msgs, res) <- tryTc thing
+ ; dflags <- getDOpts
+ ; let errs_found = errorsFound dflags msgs
+ ; return (msgs, case res of
+ Nothing -> Nothing
+ Just val | errs_found -> Nothing
+ | otherwise -> Just val)
+ }
+-----------------------
tryTcLIE :: TcM a -> TcM (Messages, Maybe a)
--- Just like tryTc, except that it ensures that the LIE
+-- Just like tryTcErrs, except that it ensures that the LIE
-- for the thing is propagated only if there are no errors
-- Hence it's restricted to the type-check monad
tryTcLIE thing_inside
- = do { ((errs, mb_r), lie) <- getLIE (tryTc thing_inside) ;
- ifM (isJust mb_r) (extendLIEs lie) ;
- return (errs, mb_r) }
+ = do { ((msgs, mb_res), lie) <- getLIE (tryTcErrs thing_inside) ;
+ ; case mb_res of
+ Nothing -> return (msgs, Nothing)
+ Just val -> do { extendLIEs lie; return (msgs, Just val) }
+ }
+-----------------------
tryTcLIE_ :: TcM r -> TcM r -> TcM r
--- (tryTcLIE_ r m) tries m; if it succeeds it returns it,
--- otherwise it returns r. Any error messages added by m are discarded,
--- whether or not m succeeds.
+-- (tryTcLIE_ r m) tries m;
+-- if m succeeds with no error messages, it's the answer
+-- otherwise tryTcLIE_ drops everything from m and tries r instead.
tryTcLIE_ recover main
- = do { (_msgs, mb_res) <- tryTcLIE main ;
- case mb_res of
- Just res -> return res
- Nothing -> recover }
+ = do { (msgs, mb_res) <- tryTcLIE main
+ ; case mb_res of
+ Just val -> do { addMessages msgs -- There might be warnings
+ ; return val }
+ Nothing -> recover -- Discard all msgs
+ }
+-----------------------
checkNoErrs :: TcM r -> TcM r
-- (checkNoErrs m) succeeds iff m succeeds and generates no errors
-- If m fails then (checkNoErrsTc m) fails.
-- If so, it fails too.
-- Regardless, any errors generated by m are propagated to the enclosing context.
checkNoErrs main
- = do { (msgs, mb_res) <- tryTcLIE main ;
- addMessages msgs ;
- case mb_res of
- Just r -> return r
- Nothing -> failM
- }
+ = do { (msgs, mb_res) <- tryTcLIE main
+ ; addMessages msgs
+ ; case mb_res of
+ Nothing -> failM
+ Just val -> return val
+ }
ifErrsM :: TcRn r -> TcRn r -> TcRn r
-- ifErrsM bale_out main
-- We use IfL here so that we can get context info out of the local env
failIfM msg
= do { env <- getLclEnv
- ; let full_msg = if_loc env $$ nest 2 msg
+ ; let full_msg = (if_loc env <> colon) $$ nest 2 msg
; ioToIOEnv (printErrs (full_msg defaultErrStyle))
; failM }
forkM doc thing_inside
= do { mb_res <- forkM_maybe doc thing_inside
; return (case mb_res of
- Nothing -> pprPanic "forkM" doc
+ Nothing -> pgmError "Cannot continue after interface file error"
+ -- pprPanic "forkM" doc
Just r -> r) }
\end{code}
projects / ghc-hetmet.git / blobdiff