newSession,
-- * Flags and settings
- DynFlags(..), DynFlag(..), GhcMode(..), HscTarget(..), dopt,
+ DynFlags(..), DynFlag(..), Severity(..), GhcMode(..), HscTarget(..), dopt,
parseDynamicFlags,
initPackages,
getSessionDynFlags,
setSessionDynFlags,
- setMsgHandler,
-- * Targets
Target(..), TargetId(..), Phase,
-- * Loading\/compiling the program
depanal,
load, LoadHowMuch(..), SuccessFlag(..), -- also does depanal
- loadMsgs,
workingDirectoryChanged,
checkModule, CheckedModule(..),
TypecheckedSource, ParsedSource, RenamedSource,
-- * Inspecting the module structure of the program
- ModuleGraph, ModSummary(..),
+ ModuleGraph, ModSummary(..), ModLocation(..),
getModuleGraph,
isLoaded,
topSortModuleGraph,
-- ** Type constructors
TyCon,
tyConTyVars, tyConDataCons, tyConArity,
- isClassTyCon, isSynTyCon, isNewTyCon, isPrimTyCon,
+ isClassTyCon, isSynTyCon, isNewTyCon, isPrimTyCon, isFunTyCon,
getSynTyConDefn,
-- ** Type variables
-- ** Instances
Instance,
- instanceDFunId, pprInstance,
+ instanceDFunId, pprInstance, pprInstanceHdr,
-- ** Types and Kinds
Type, dropForAlls, splitForAllTys, funResultTy, pprParendType,
import Var ( TyVar )
import TysPrim ( alphaTyVars )
import TyCon ( TyCon, isClassTyCon, isSynTyCon, isNewTyCon,
- isPrimTyCon, tyConArity,
+ isPrimTyCon, isFunTyCon, tyConArity,
tyConTyVars, tyConDataCons, getSynTyConDefn )
import Class ( Class, classSCTheta, classTvsFds, classMethods )
import FunDeps ( pprFundeps )
nameSrcLoc )
import OccName ( parenSymOcc )
import NameEnv ( nameEnvElts )
-import InstEnv ( Instance, instanceDFunId, pprInstance )
+import InstEnv ( Instance, instanceDFunId, pprInstance, pprInstanceHdr )
import SrcLoc
import DriverPipeline
import DriverPhases ( Phase(..), isHaskellSrcFilename, startPhase )
import FiniteMap
import Panic
import Digraph
-import Bag ( unitBag, emptyBag )
-import ErrUtils ( showPass, Messages, putMsg, debugTraceMsg,
- mkPlainErrMsg, pprBagOfErrors )
+import Bag ( unitBag )
+import ErrUtils ( Severity(..), showPass, fatalErrorMsg, debugTraceMsg,
+ mkPlainErrMsg, printBagOfErrors, printErrorsAndWarnings )
import qualified ErrUtils
import Util
import StringBuffer ( StringBuffer, hGetStringBuffer )
import SysTools ( cleanTempFilesExcept )
import BasicTypes
import TcType ( tcSplitSigmaTy, isDictTy )
-import FastString ( mkFastString )
import Directory ( getModificationTime, doesFileExist )
import Maybe ( isJust, isNothing, fromJust )
-import Maybes ( orElse, expectJust, mapCatMaybes )
+import Maybes ( expectJust, mapCatMaybes )
import List ( partition, nub )
import qualified List
import Monad ( unless, when )
-- Unless you want to handle exceptions yourself, you should wrap this around
-- the top level of your program. The default handlers output the error
-- message(s) to stderr and exit cleanly.
-defaultErrorHandler :: IO a -> IO a
-defaultErrorHandler inner =
+defaultErrorHandler :: DynFlags -> IO a -> IO a
+defaultErrorHandler dflags inner =
-- top-level exception handler: any unrecognised exception is a compiler bug.
handle (\exception -> do
hFlush stdout
case exception of
-- an IO exception probably isn't our fault, so don't panic
- IOException _ -> putMsg (show exception)
+ IOException _ ->
+ fatalErrorMsg dflags (text (show exception))
AsyncException StackOverflow ->
- putMsg "stack overflow: use +RTS -K<size> to increase it"
- _other -> putMsg (show (Panic (show exception)))
+ fatalErrorMsg dflags (text "stack overflow: use +RTS -K<size> to increase it")
+ _other ->
+ fatalErrorMsg dflags (text (show (Panic (show exception))))
exitWith (ExitFailure 1)
) $
-- program errors: messages with locations attached. Sometimes it is
-- convenient to just throw these as exceptions.
- handleDyn (\dyn -> do printErrs (pprBagOfErrors (unitBag dyn))
+ handleDyn (\dyn -> do printBagOfErrors dflags (unitBag dyn)
exitWith (ExitFailure 1)) $
-- error messages propagated as exceptions
case dyn of
PhaseFailed _ code -> exitWith code
Interrupted -> exitWith (ExitFailure 1)
- _ -> do putMsg (show (dyn :: GhcException))
+ _ -> do fatalErrorMsg dflags (text (show (dyn :: GhcException)))
exitWith (ExitFailure 1)
) $
inner
setSessionDynFlags :: Session -> DynFlags -> IO ()
setSessionDynFlags s dflags = modifySession s (\h -> h{ hsc_dflags = dflags })
--- | Messages during compilation (eg. warnings and progress messages)
--- are reported using this callback. By default, these messages are
--- printed to stderr.
-setMsgHandler :: (String -> IO ()) -> IO ()
-setMsgHandler = ErrUtils.setMsgHandler
+-- | If there is no -o option, guess the name of target executable
+-- by using top-level source file name as a base.
+guessOutputFile :: Session -> IO ()
+guessOutputFile s = modifySession s $ \env ->
+ let dflags = hsc_dflags env
+ mod_graph = hsc_mod_graph env
+ mainModuleSrcPath, guessedName :: Maybe String
+ mainModuleSrcPath = do
+ let isMain = (== mainModIs dflags) . ms_mod
+ [ms] <- return (filter isMain mod_graph)
+ ml_hs_file (ms_location ms)
+ guessedName = fmap basenameOf mainModuleSrcPath
+ in
+ case outputFile dflags of
+ Just _ -> env
+ Nothing -> env { hsc_dflags = dflags { outputFile = guessedName } }
-- -----------------------------------------------------------------------------
-- Targets
-- Perform a dependency analysis starting from the current targets
-- and update the session with the new module graph.
-depanal :: Session -> [Module] -> Bool -> IO (Either Messages ModuleGraph)
+depanal :: Session -> [Module] -> Bool -> IO (Maybe ModuleGraph)
depanal (Session ref) excluded_mods allow_dup_roots = do
hsc_env <- readIORef ref
let
showPass dflags "Chasing dependencies"
when (gmode == BatchCompile) $
- debugTraceMsg dflags 1 (showSDoc (hcat [
+ debugTraceMsg dflags 1 (hcat [
text "Chasing modules from: ",
- hcat (punctuate comma (map pprTarget targets))]))
+ hcat (punctuate comma (map pprTarget targets))])
r <- downsweep hsc_env old_graph excluded_mods allow_dup_roots
case r of
- Right mod_graph -> writeIORef ref hsc_env{ hsc_mod_graph = mod_graph }
+ Just mod_graph -> writeIORef ref hsc_env{ hsc_mod_graph = mod_graph }
_ -> return ()
return r
-- attempt to load up to this target. If no Module is supplied,
-- then try to load all targets.
load :: Session -> LoadHowMuch -> IO SuccessFlag
-load session how_much =
- loadMsgs session how_much ErrUtils.printErrorsAndWarnings
-
--- | Version of 'load' that takes a callback function to be invoked
--- on compiler errors and warnings as they occur during compilation.
-loadMsgs :: Session -> LoadHowMuch -> (Messages-> IO ()) -> IO SuccessFlag
-loadMsgs s@(Session ref) how_much msg_act
+load s@(Session ref) how_much
= do
-- Dependency analysis first. Note that this fixes the module graph:
-- even if we don't get a fully successful upsweep, the full module
-- graph is still retained in the Session. We can tell which modules
-- were successfully loaded by inspecting the Session's HPT.
mb_graph <- depanal s [] False
- case mb_graph of
- Left msgs -> do msg_act msgs; return Failed
- Right mod_graph -> loadMsgs2 s how_much msg_act mod_graph
+ case mb_graph of
+ Just mod_graph -> load2 s how_much mod_graph
+ Nothing -> return Failed
-loadMsgs2 s@(Session ref) how_much msg_act mod_graph = do
+load2 s@(Session ref) how_much mod_graph = do
+ guessOutputFile s
hsc_env <- readIORef ref
let hpt1 = hsc_HPT hsc_env
evaluate pruned_hpt
- debugTraceMsg dflags 2 (showSDoc (text "Stable obj:" <+> ppr stable_obj $$
- text "Stable BCO:" <+> ppr stable_bco))
+ debugTraceMsg dflags 2 (text "Stable obj:" <+> ppr stable_obj $$
+ text "Stable BCO:" <+> ppr stable_bco)
-- Unload any modules which are going to be re-linked this time around.
let stable_linkables = [ linkable
(upsweep_ok, hsc_env1, modsUpswept)
<- upsweep (hsc_env { hsc_HPT = emptyHomePackageTable })
- pruned_hpt stable_mods cleanup msg_act mg
+ pruned_hpt stable_mods cleanup mg
-- Make modsDone be the summaries for each home module now
-- available; this should equal the domain of hpt3.
then
-- Easy; just relink it all.
- do debugTraceMsg dflags 2 "Upsweep completely successful."
+ do debugTraceMsg dflags 2 (text "Upsweep completely successful.")
-- Clean up after ourselves
cleanTempFilesExcept dflags (ppFilesFromSummaries modsDone)
--
let ofile = outputFile dflags
let no_hs_main = dopt Opt_NoHsMain dflags
- let mb_main_mod = mainModIs dflags
let
- main_mod = mb_main_mod `orElse` "Main"
- a_root_is_Main
- = any ((==main_mod).moduleUserString.ms_mod)
- mod_graph
+ main_mod = mainModIs dflags
+ a_root_is_Main = any ((==main_mod).ms_mod) mod_graph
do_linking = a_root_is_Main || no_hs_main
when (ghci_mode == BatchCompile && isJust ofile && not do_linking) $
- debugTraceMsg dflags 1 ("Warning: output was redirected with -o, " ++
- "but no output will be generated\n" ++
- "because there is no " ++ main_mod ++ " module.")
+ debugTraceMsg dflags 1 (text ("Warning: output was redirected with -o, " ++
+ "but no output will be generated\n" ++
+ "because there is no " ++ moduleString main_mod ++ " module."))
-- link everything together
linkresult <- link ghci_mode dflags do_linking (hsc_HPT hsc_env1)
-- Tricky. We need to back out the effects of compiling any
-- half-done cycles, both so as to clean up the top level envs
-- and to avoid telling the interactive linker to link them.
- do debugTraceMsg dflags 2 "Upsweep partially successful."
+ do debugTraceMsg dflags 2 (text "Upsweep partially successful.")
let modsDone_names
= map ms_mod modsDone
-- for a module. 'checkModule' loads all the dependencies of the specified
-- module in the Session, and then attempts to typecheck the module. If
-- successful, it returns the abstract syntax for the module.
-checkModule :: Session -> Module -> (Messages -> IO ())
- -> IO (Maybe CheckedModule)
-checkModule session@(Session ref) mod msg_act = do
+checkModule :: Session -> Module -> IO (Maybe CheckedModule)
+checkModule session@(Session ref) mod = do
-- load up the dependencies first
- r <- loadMsgs session (LoadDependenciesOf mod) msg_act
+ r <- load session (LoadDependenciesOf mod)
if (failed r) then return Nothing else do
-- now parse & typecheck the module
-- ml_hspp_file field, say
let dflags0 = hsc_dflags hsc_env
hspp_buf = expectJust "GHC.checkModule" (ms_hspp_buf ms)
- opts = getOptionsFromStringBuffer hspp_buf
+ filename = fromJust (ml_hs_file (ms_location ms))
+ opts = getOptionsFromStringBuffer hspp_buf filename
(dflags1,leftovers) <- parseDynamicFlags dflags0 (map snd opts)
if (not (null leftovers))
- then do let filename = fromJust (ml_hs_file (ms_location ms))
- msg_act (optionsErrorMsgs leftovers opts filename)
+ then do printErrorsAndWarnings dflags1 (optionsErrorMsgs leftovers opts filename)
return Nothing
else do
- r <- hscFileCheck hsc_env{hsc_dflags=dflags1} msg_act ms
+ r <- hscFileCheck hsc_env{hsc_dflags=dflags1} ms
case r of
HscFail ->
return Nothing
-> HomePackageTable -- HPT from last time round (pruned)
-> ([Module],[Module]) -- stable modules (see checkStability)
-> IO () -- How to clean up unwanted tmp files
- -> (Messages -> IO ()) -- Compiler error message callback
-> [SCC ModSummary] -- Mods to do (the worklist)
-> IO (SuccessFlag,
HscEnv, -- With an updated HPT
[ModSummary]) -- Mods which succeeded
-upsweep hsc_env old_hpt stable_mods cleanup msg_act mods
- = upsweep' hsc_env old_hpt stable_mods cleanup msg_act mods 1 (length mods)
+upsweep hsc_env old_hpt stable_mods cleanup mods
+ = upsweep' hsc_env old_hpt stable_mods cleanup mods 1 (length mods)
-upsweep' hsc_env old_hpt stable_mods cleanup msg_act
+upsweep' hsc_env old_hpt stable_mods cleanup
[] _ _
= return (Succeeded, hsc_env, [])
-upsweep' hsc_env old_hpt stable_mods cleanup msg_act
+upsweep' hsc_env old_hpt stable_mods cleanup
(CyclicSCC ms:_) _ _
- = do putMsg (showSDoc (cyclicModuleErr ms))
+ = do fatalErrorMsg (hsc_dflags hsc_env) (cyclicModuleErr ms)
return (Failed, hsc_env, [])
-upsweep' hsc_env old_hpt stable_mods cleanup msg_act
+upsweep' hsc_env old_hpt stable_mods cleanup
(AcyclicSCC mod:mods) mod_index nmods
= do -- putStrLn ("UPSWEEP_MOD: hpt = " ++
-- show (map (moduleUserString.moduleName.mi_module.hm_iface)
-- (moduleEnvElts (hsc_HPT hsc_env)))
- mb_mod_info <- upsweep_mod hsc_env old_hpt stable_mods msg_act mod
+ mb_mod_info <- upsweep_mod hsc_env old_hpt stable_mods mod
mod_index nmods
cleanup -- Remove unwanted tmp files between compilations
; (restOK, hsc_env2, modOKs)
<- upsweep' hsc_env1 old_hpt1 stable_mods cleanup
- msg_act mods (mod_index+1) nmods
+ mods (mod_index+1) nmods
; return (restOK, hsc_env2, mod:modOKs)
}
upsweep_mod :: HscEnv
-> HomePackageTable
-> ([Module],[Module])
- -> (Messages -> IO ())
-> ModSummary
-> Int -- index of module
-> Int -- total number of modules
-> IO (Maybe HomeModInfo) -- Nothing => Failed
-upsweep_mod hsc_env old_hpt (stable_obj, stable_bco) msg_act summary mod_index nmods
+upsweep_mod hsc_env old_hpt (stable_obj, stable_bco) summary mod_index nmods
= do
let
this_mod = ms_mod summary
compile_it :: Maybe Linkable -> IO (Maybe HomeModInfo)
compile_it = upsweep_compile hsc_env old_hpt this_mod
- msg_act summary mod_index nmods
+ summary mod_index nmods
case ghcMode (hsc_dflags hsc_env) of
BatchCompile ->
old_hmi = lookupModuleEnv old_hpt this_mod
-- Run hsc to compile a module
-upsweep_compile hsc_env old_hpt this_mod msg_act summary
+upsweep_compile hsc_env old_hpt this_mod summary
mod_index nmods
mb_old_linkable = do
let
where
iface = hm_iface hm_info
- compresult <- compile hsc_env msg_act summary mb_old_linkable mb_old_iface
+ compresult <- compile hsc_env summary mb_old_linkable mb_old_iface
mod_index nmods
case compresult of
-> Bool -- True <=> allow multiple targets to have
-- the same module name; this is
-- very useful for ghc -M
- -> IO (Either Messages [ModSummary])
+ -> IO (Maybe [ModSummary])
-- The elts of [ModSummary] all have distinct
-- (Modules, IsBoot) identifiers, unless the Bool is true
-- in which case there can be repeats
downsweep hsc_env old_summaries excl_mods allow_dup_roots
= -- catch error messages and return them
- handleDyn (\err_msg -> return (Left (emptyBag, unitBag err_msg))) $ do
+ handleDyn (\err_msg -> printBagOfErrors (hsc_dflags hsc_env) (unitBag err_msg) >> return Nothing) $ do
rootSummaries <- mapM getRootSummary roots
let root_map = mkRootMap rootSummaries
checkDuplicates root_map
summs <- loop (concatMap msDeps rootSummaries) root_map
- return (Right summs)
+ return (Just summs)
where
roots = hsc_targets hsc_env
= do
-- case we bypass the preprocessing stage?
let
- local_opts = getOptionsFromStringBuffer buf
+ local_opts = getOptionsFromStringBuffer buf src_fn
--
(dflags', errs) <- parseDynamicFlags dflags (map snd local_opts)
projects / ghc-hetmet.git / blobdiff