ghc-mod/core/Language/Haskell/GhcMod/Gap.hs
2017-05-12 15:28:19 +02:00

724 lines
22 KiB
Haskell

{-# LANGUAGE TypeSynonymInstances, FlexibleInstances, CPP, ScopedTypeVariables, RankNTypes #-}
module Language.Haskell.GhcMod.Gap (
Language.Haskell.GhcMod.Gap.ClsInst
, mkTarget
, withStyle
, GmLogAction
, setLogAction
, getSrcSpan
, getSrcFile
, withInteractiveContext
, ghcCmdOptions
, toStringBuffer
, showSeverityCaption
, setCabalPkg
, setHideAllPackages
, setDeferTypeErrors
, setDeferTypedHoles
, setWarnTypedHoles
, setDumpSplices
, setNoMaxRelevantBindings
, isDumpSplices
, filterOutChildren
, infoThing
, pprInfo
, HasType(..)
, errorMsgSpan
, setErrorMsgSpan
, typeForUser
, nameForUser
, occNameForUser
, deSugar
, showDocWith
, renderGm
, GapThing(..)
, fromTyThing
, fileModSummary
, WarnFlags
, emptyWarnFlags
, GLMatch
, GLMatchI
, getClass
, occName
, listVisibleModuleNames
, listVisibleModules
, lookupModulePackageInAllPackages
, Language.Haskell.GhcMod.Gap.isSynTyCon
, parseModuleHeader
, mkErrStyle'
, everythingStagedWithContext
, withCleanupSession
) where
import Control.Applicative hiding (empty)
import Control.Monad (filterM)
import CoreSyn (CoreExpr)
import Data.List (intersperse)
import Data.Maybe (catMaybes)
import Data.Time.Clock (UTCTime)
import Data.Traversable hiding (mapM)
import DataCon (dataConUserType)
import Desugar (deSugarExpr)
import DynFlags
import ErrUtils
import Exception
import FastString
import GhcMonad
import HscTypes
import NameSet
import OccName
import Outputable
import PprTyThing
import StringBuffer
import TcType
import Var (varType)
import System.Directory
import SysTools
#if __GLASGOW_HASKELL__ >= 800
import GHCi (stopIServ)
#endif
import qualified Name
import qualified InstEnv
import qualified Pretty
import qualified StringBuffer as SB
#if __GLASGOW_HASKELL__ >= 710
import CoAxiom (coAxiomTyCon)
#endif
#if __GLASGOW_HASKELL__ >= 708
import FamInstEnv
import ConLike (ConLike(..))
import PatSyn
#else
import TcRnTypes
#endif
-- GHC 7.8 doesn't define this macro, nor does GHC 7.10.0
-- It IS defined from 7.10.1 and up though.
-- So we can only test for 7.10.1.0 and up with it.
#if __GLASGOW_HASKELL__ < 710
#ifndef MIN_VERSION_GLASGOW_HASKELL
#define MIN_VERSION_GLASGOW_HASKELL(a,b,c,d) FALSE
#endif
#endif
#if MIN_VERSION_GLASGOW_HASKELL(8,0,1,20161117)
import GHC hiding (ClsInst, withCleanupSession)
import qualified GHC (withCleanupSession)
#elif __GLASGOW_HASKELL__ >= 706
import GHC hiding (ClsInst)
#else
import GHC hiding (Instance)
import Control.Arrow hiding ((<+>))
import Data.Convertible
import RdrName (rdrNameOcc)
#endif
#if __GLASGOW_HASKELL__ < 710
import UniqFM (eltsUFM)
import Module
#endif
#if __GLASGOW_HASKELL__ >= 704
import qualified Data.IntSet as I (IntSet, empty)
#endif
#if __GLASGOW_HASKELL__ < 706
import Control.DeepSeq (NFData(rnf))
import Data.ByteString.Lazy.Internal (ByteString(..))
#endif
import Bag
import Lexer as L
import Parser
import SrcLoc
import Packages
import Data.Generics (GenericQ, extQ, gmapQ)
import GHC.SYB.Utils (Stage(..))
import Language.Haskell.GhcMod.Types (Expression(..))
import Prelude
----------------------------------------------------------------
----------------------------------------------------------------
--
#if __GLASGOW_HASKELL__ >= 706
type ClsInst = InstEnv.ClsInst
#else
type ClsInst = InstEnv.Instance
#endif
mkTarget :: TargetId -> Bool -> Maybe (SB.StringBuffer, UTCTime) -> Target
#if __GLASGOW_HASKELL__ >= 706
mkTarget = Target
#else
mkTarget tid allowObjCode = Target tid allowObjCode . (fmap . second) convert
#endif
----------------------------------------------------------------
----------------------------------------------------------------
withStyle :: DynFlags -> PprStyle -> SDoc -> Pretty.Doc
#if __GLASGOW_HASKELL__ >= 706
withStyle = withPprStyleDoc
#else
withStyle _ = withPprStyleDoc
#endif
#if __GLASGOW_HASKELL__ >= 800
-- flip LogAction
type GmLogAction = WarnReason -> DynFlags -> Severity -> SrcSpan -> PprStyle -> MsgDoc -> IO ()
#elif __GLASGOW_HASKELL__ >= 706
type GmLogAction = forall a. a -> LogAction
#else
type GmLogAction = forall a. a -> DynFlags -> LogAction
#endif
-- DynFlags -> WarnReason -> Severity -> SrcSpan -> PprStyle -> MsgDoc -> IO ()
setLogAction :: DynFlags -> GmLogAction -> DynFlags
setLogAction df f =
#if __GLASGOW_HASKELL__ >= 800
df { log_action = flip f }
#elif __GLASGOW_HASKELL__ >= 706
df { log_action = f (error "setLogAction") }
#else
df { log_action = f (error "setLogAction") df }
#endif
showDocWith :: DynFlags -> Pretty.Mode -> Pretty.Doc -> String
#if __GLASGOW_HASKELL__ >= 800
showDocWith dflags mode = Pretty.renderStyle mstyle where
mstyle = Pretty.style { Pretty.mode = mode, Pretty.lineLength = pprCols dflags }
#elif __GLASGOW_HASKELL__ >= 708
-- Pretty.showDocWith disappeard.
-- https://github.com/ghc/ghc/commit/08a3536e4246e323fbcd8040e0b80001950fe9bc
showDocWith dflags mode = Pretty.showDoc mode (pprCols dflags)
#else
showDocWith _ = Pretty.showDocWith
#endif
renderGm :: Pretty.Doc -> String
#if __GLASGOW_HASKELL__ >= 800
renderGm = Pretty.fullRender Pretty.PageMode 80 1.2 string_txt ""
#else
renderGm = Pretty.fullRender Pretty.PageMode 80 1.2 string_txt ""
#endif
where
string_txt :: Pretty.TextDetails -> String -> String
string_txt (Pretty.Chr c) s = c:s
string_txt (Pretty.Str s1) s2 = s1 ++ s2
string_txt (Pretty.PStr s1) s2 = unpackFS s1 ++ s2
string_txt (Pretty.LStr s1 _) s2 = unpackLitString s1 ++ s2
#if __GLASGOW_HASKELL__ >= 708
string_txt (Pretty.ZStr s1) s2 = zString s1 ++ s2
#endif
----------------------------------------------------------------
----------------------------------------------------------------
getSrcSpan :: SrcSpan -> Maybe (Int,Int,Int,Int)
#if __GLASGOW_HASKELL__ >= 702
getSrcSpan (RealSrcSpan spn)
#else
getSrcSpan spn | isGoodSrcSpan spn
#endif
= Just (srcSpanStartLine spn
, srcSpanStartCol spn
, srcSpanEndLine spn
, srcSpanEndCol spn)
getSrcSpan _ = Nothing
getSrcFile :: SrcSpan -> Maybe String
#if __GLASGOW_HASKELL__ >= 702
getSrcFile (RealSrcSpan spn) = Just . unpackFS . srcSpanFile $ spn
#else
getSrcFile spn | isGoodSrcSpan spn = Just . unpackFS . srcSpanFile $ spn
#endif
getSrcFile _ = Nothing
----------------------------------------------------------------
toStringBuffer :: GhcMonad m => [String] -> m StringBuffer
#if __GLASGOW_HASKELL__ >= 702
toStringBuffer = return . stringToStringBuffer . unlines
#else
toStringBuffer = liftIO . stringToStringBuffer . unlines
#endif
----------------------------------------------------------------
ghcCmdOptions :: [String]
#if __GLASGOW_HASKELL__ >= 710
-- this also includes -X options and all sorts of other things so the
ghcCmdOptions = flagsForCompletion False
#else
ghcCmdOptions = [ "-f" ++ prefix ++ option
| option <- opts
, prefix <- ["","no-"]
]
# if __GLASGOW_HASKELL__ >= 704
where opts =
[option | (option,_,_) <- fFlags]
++ [option | (option,_,_) <- fWarningFlags]
++ [option | (option,_,_) <- fLangFlags]
# else
where opts =
[option | (option,_,_,_) <- fFlags]
++ [option | (option,_,_,_) <- fWarningFlags]
++ [option | (option,_,_,_) <- fLangFlags]
# endif
#endif
----------------------------------------------------------------
----------------------------------------------------------------
fileModSummary :: GhcMonad m => FilePath -> m ModSummary
fileModSummary file' = do
mss <- getModuleGraph
file <- liftIO $ canonicalizePath file'
[ms] <- liftIO $ flip filterM mss $ \m ->
(Just file==) <$> canonicalizePath `traverse` ml_hs_file (ms_location m)
return ms
withInteractiveContext :: GhcMonad m => m a -> m a
withInteractiveContext action = gbracket setup teardown body
where
setup = getContext
teardown = setCtx
body _ = do
topImports >>= setCtx
action
topImports = do
ms <- filterM moduleIsInterpreted =<< map ms_mod <$> getModuleGraph
let iis = map (IIModule . modName) ms
#if __GLASGOW_HASKELL__ >= 704
return iis
#else
return (iis,[])
#endif
#if __GLASGOW_HASKELL__ >= 706
modName = moduleName
setCtx = setContext
#elif __GLASGOW_HASKELL__ >= 704
modName = id
setCtx = setContext
#else
modName = ms_mod
setCtx = uncurry setContext
#endif
showSeverityCaption :: Severity -> String
#if __GLASGOW_HASKELL__ >= 706
showSeverityCaption SevWarning = "Warning: "
showSeverityCaption _ = ""
#else
showSeverityCaption = const ""
#endif
----------------------------------------------------------------
----------------------------------------------------------------
setCabalPkg :: DynFlags -> DynFlags
#if __GLASGOW_HASKELL__ >= 708
setCabalPkg dflag = gopt_set dflag Opt_BuildingCabalPackage
#else
setCabalPkg dflag = dopt_set dflag Opt_BuildingCabalPackage
#endif
----------------------------------------------------------------
setHideAllPackages :: DynFlags -> DynFlags
#if __GLASGOW_HASKELL__ >= 708
setHideAllPackages df = gopt_set df Opt_HideAllPackages
#else
setHideAllPackages df = dopt_set df Opt_HideAllPackages
#endif
----------------------------------------------------------------
setDumpSplices :: DynFlags -> DynFlags
setDumpSplices dflag = dopt_set dflag Opt_D_dump_splices
isDumpSplices :: DynFlags -> Bool
isDumpSplices dflag = dopt Opt_D_dump_splices dflag
----------------------------------------------------------------
setDeferTypeErrors :: DynFlags -> DynFlags
#if __GLASGOW_HASKELL__ >= 708
setDeferTypeErrors dflag = gopt_set dflag Opt_DeferTypeErrors
#elif __GLASGOW_HASKELL__ >= 706
setDeferTypeErrors dflag = dopt_set dflag Opt_DeferTypeErrors
#else
setDeferTypeErrors = id
#endif
setDeferTypedHoles :: DynFlags -> DynFlags
#if __GLASGOW_HASKELL__ >= 710
setDeferTypedHoles dflag = gopt_set dflag Opt_DeferTypedHoles
#else
setDeferTypedHoles = id
#endif
setWarnTypedHoles :: DynFlags -> DynFlags
#if __GLASGOW_HASKELL__ >= 708
setWarnTypedHoles dflag = wopt_set dflag Opt_WarnTypedHoles
#else
setWarnTypedHoles = id
#endif
----------------------------------------------------------------
-- | Set 'DynFlags' equivalent to "-fno-max-relevant-bindings".
setNoMaxRelevantBindings :: DynFlags -> DynFlags
#if __GLASGOW_HASKELL__ >= 708
setNoMaxRelevantBindings df = df { maxRelevantBinds = Nothing }
#else
setNoMaxRelevantBindings = id
#endif
----------------------------------------------------------------
----------------------------------------------------------------
class HasType a where
getType :: GhcMonad m => TypecheckedModule -> a -> m (Maybe (SrcSpan, Type))
instance HasType (LHsBind Id) where
#if __GLASGOW_HASKELL__ >= 708
getType _ (L spn FunBind{fun_matches = m}) = return $ Just (spn, typ)
where in_tys = mg_arg_tys m
out_typ = mg_res_ty m
typ = mkFunTys in_tys out_typ
#else
getType _ (L spn FunBind{fun_matches = MatchGroup _ typ}) = return $ Just (spn, typ)
#endif
getType _ _ = return Nothing
----------------------------------------------------------------
----------------------------------------------------------------
-- from ghc/InteractiveUI.hs
filterOutChildren :: (a -> TyThing) -> [a] -> [a]
filterOutChildren get_thing xs
= [x | x <- xs, not (getName (get_thing x) `elemNameSet` implicits)]
where
implicits = mkNameSet [getName t | x <- xs, t <- implicitTyThings (get_thing x)]
infoThing :: GhcMonad m => (FilePath -> FilePath) -> Expression -> m SDoc
infoThing m (Expression str) = do
names <- parseName str
#if __GLASGOW_HASKELL__ >= 708
mb_stuffs <- mapM (getInfo False) names
let filtered = filterOutChildren (\(t,_f,_i,_fam) -> t) (catMaybes mb_stuffs)
#else
mb_stuffs <- mapM getInfo names
let filtered = filterOutChildren (\(t,_f,_i) -> t) (catMaybes mb_stuffs)
#endif
return $ vcat (intersperse (text "") $ map (pprInfo m False) filtered)
#if __GLASGOW_HASKELL__ >= 708
pprInfo :: (FilePath -> FilePath) -> Bool -> (TyThing, GHC.Fixity, [ClsInst], [FamInst]) -> SDoc
pprInfo m _ (thing, fixity, insts, famInsts)
= pprTyThingInContextLoc' thing
$$ show_fixity fixity
$$ vcat (map pprInstance' insts)
$$ vcat (map pprFamInst' famInsts)
#else
pprInfo :: (FilePath -> FilePath) -> PrintExplicitForalls -> (TyThing, GHC.Fixity, [ClsInst]) -> SDoc
pprInfo m pefas (thing, fixity, insts)
= pprTyThingInContextLoc' pefas thing
$$ show_fixity fixity
$$ vcat (map pprInstance' insts)
#endif
where
show_fixity fx
| fx == defaultFixity = Outputable.empty
| otherwise = ppr fx <+> ppr (getName thing)
#if __GLASGOW_HASKELL__ >= 708
pprTyThingInContextLoc' thing' = showWithLoc (pprDefinedAt' thing') (pprTyThingInContext thing')
#if __GLASGOW_HASKELL__ >= 710
pprFamInst' (FamInst { fi_flavor = DataFamilyInst rep_tc })
= pprTyThingInContextLoc (ATyCon rep_tc)
pprFamInst' (FamInst { fi_flavor = SynFamilyInst, fi_axiom = axiom
, fi_tys = lhs_tys, fi_rhs = rhs })
= showWithLoc (pprDefinedAt' (getName axiom)) $
hang (ptext (sLit "type instance") <+> pprTypeApp (coAxiomTyCon axiom) lhs_tys)
2 (equals <+> ppr rhs)
#else
pprFamInst' ispec = showWithLoc (pprDefinedAt' (getName ispec)) (pprFamInstHdr ispec)
#endif
#else
pprTyThingInContextLoc' pefas' thing' = showWithLoc (pprDefinedAt' thing') (pprTyThingInContext pefas' thing')
#endif
showWithLoc loc doc
= hang doc 2 (char '\t' <> comment <+> loc)
-- The tab tries to make them line up a bit
where
comment = ptext (sLit "--")
pprInstance' ispec = hang (pprInstanceHdr ispec)
2 (ptext (sLit "--") <+> pprDefinedAt' (getName ispec))
pprDefinedAt' thing' = ptext (sLit "Defined") <+> pprNameDefnLoc' (getName thing')
pprNameDefnLoc' name
= case Name.nameSrcLoc name of
RealSrcLoc s -> ptext (sLit "at") <+> ppr (subst s)
UnhelpfulLoc s
| Name.isInternalName name || Name.isSystemName name
-> ptext (sLit "at") <+> ftext s
| otherwise
-> ptext (sLit "in") <+> quotes (ppr (nameModule name))
where subst s = mkRealSrcLoc (realFP s) (srcLocLine s) (srcLocCol s)
realFP = mkFastString . m . unpackFS . srcLocFile
----------------------------------------------------------------
----------------------------------------------------------------
errorMsgSpan :: ErrMsg -> SrcSpan
#if __GLASGOW_HASKELL__ >= 708
errorMsgSpan = errMsgSpan
#else
errorMsgSpan = head . errMsgSpans
#endif
setErrorMsgSpan :: ErrMsg -> SrcSpan -> ErrMsg
#if __GLASGOW_HASKELL__ >= 708
setErrorMsgSpan err s = err { errMsgSpan = s }
#else
setErrorMsgSpan err s = err { errMsgSpans = [s] }
#endif
typeForUser :: Type -> SDoc
#if __GLASGOW_HASKELL__ >= 708
typeForUser = pprTypeForUser
#else
typeForUser = pprTypeForUser False
#endif
nameForUser :: Name -> SDoc
nameForUser = pprOccName . getOccName
occNameForUser :: OccName -> SDoc
occNameForUser = pprOccName
deSugar :: TypecheckedModule -> LHsExpr Id -> HscEnv
-> IO (Maybe CoreExpr)
#if __GLASGOW_HASKELL__ >= 708
deSugar _ e hs_env = snd <$> deSugarExpr hs_env e
#else
deSugar tcm e hs_env = snd <$> deSugarExpr hs_env modu rn_env ty_env e
where
modu = ms_mod $ pm_mod_summary $ tm_parsed_module tcm
tcgEnv = fst $ tm_internals_ tcm
rn_env = tcg_rdr_env tcgEnv
ty_env = tcg_type_env tcgEnv
#endif
----------------------------------------------------------------
----------------------------------------------------------------
data GapThing = GtA Type
| GtT TyCon
| GtN
#if __GLASGOW_HASKELL__ >= 800
| GtPatSyn PatSyn
#endif
fromTyThing :: TyThing -> GapThing
fromTyThing (AnId i) = GtA $ varType i
#if __GLASGOW_HASKELL__ >= 708
fromTyThing (AConLike (RealDataCon d)) = GtA $ dataConUserType d
#if __GLASGOW_HASKELL__ >= 800
fromTyThing (AConLike (PatSynCon p)) = GtPatSyn p
#else
fromTyThing (AConLike (PatSynCon p)) = GtA $ patSynType p
#endif
#else
fromTyThing (ADataCon d) = GtA $ dataConUserType d
#endif
fromTyThing (ATyCon t) = GtT t
fromTyThing _ = GtN
----------------------------------------------------------------
----------------------------------------------------------------
#if __GLASGOW_HASKELL__ >= 704
type WarnFlags = I.IntSet
emptyWarnFlags :: WarnFlags
emptyWarnFlags = I.empty
#else
type WarnFlags = [WarningFlag]
emptyWarnFlags :: WarnFlags
emptyWarnFlags = []
#endif
----------------------------------------------------------------
----------------------------------------------------------------
#if __GLASGOW_HASKELL__ >= 708
type GLMatch = LMatch RdrName (LHsExpr RdrName)
type GLMatchI = LMatch Id (LHsExpr Id)
#else
type GLMatch = LMatch RdrName
type GLMatchI = LMatch Id
#endif
getClass :: [LInstDecl Name] -> Maybe (Name, SrcSpan)
#if __GLASGOW_HASKELL__ >= 800
-- Instance declarations of sort 'instance F (G a)'
getClass [L loc (ClsInstD (ClsInstDecl {cid_poly_ty = HsIB _ (L _ (HsForAllTy _ (L _ (HsAppTy (L _ (HsTyVar (L _ className))) _))))}))] = Just (className, loc)
-- Instance declarations of sort 'instance F G' (no variables)
getClass [L loc (ClsInstD (ClsInstDecl {cid_poly_ty = HsIB _ (L _ (HsAppTy (L _ (HsTyVar (L _ className))) _))}))] = Just (className, loc)
#elif __GLASGOW_HASKELL__ >= 710
-- Instance declarations of sort 'instance F (G a)'
getClass [L loc (ClsInstD (ClsInstDecl {cid_poly_ty = (L _ (HsForAllTy _ _ _ _ (L _ (HsAppTy (L _ (HsTyVar className)) _))))}))] = Just (className, loc)
-- Instance declarations of sort 'instance F G' (no variables)
getClass [L loc (ClsInstD (ClsInstDecl {cid_poly_ty = (L _ (HsAppTy (L _ (HsTyVar className)) _))}))] = Just (className, loc)
#elif __GLASGOW_HASKELL__ >= 708
-- Instance declarations of sort 'instance F (G a)'
getClass [L loc (ClsInstD (ClsInstDecl {cid_poly_ty = (L _ (HsForAllTy _ _ _ (L _ (HsAppTy (L _ (HsTyVar className)) _))))}))] = Just (className, loc)
-- Instance declarations of sort 'instance F G' (no variables)
getClass [L loc (ClsInstD (ClsInstDecl {cid_poly_ty = (L _ (HsAppTy (L _ (HsTyVar className)) _))}))] = Just (className, loc)
#elif __GLASGOW_HASKELL__ >= 706
getClass [L loc (ClsInstD (L _ (HsForAllTy _ _ _ (L _ (HsAppTy (L _ (HsTyVar className)) _)))) _ _ _)] = Just (className, loc)
getClass[L loc (ClsInstD (L _ (HsAppTy (L _ (HsTyVar className)) _)) _ _ _)] = Just (className, loc)
#else
getClass [L loc (InstDecl (L _ (HsForAllTy _ _ _ (L _ (HsAppTy (L _ (HsTyVar className)) _)))) _ _ _)] = Just (className, loc)
getClass [L loc (InstDecl (L _ (HsAppTy (L _ (HsTyVar className)) _)) _ _ _)] = Just (className, loc)
#endif
getClass _ = Nothing
#if __GLASGOW_HASKELL__ < 706
occName :: RdrName -> OccName
occName = rdrNameOcc
#endif
----------------------------------------------------------------
#if __GLASGOW_HASKELL__ < 710
-- Copied from ghc/InteractiveUI.hs
allExposedPackageConfigs :: DynFlags -> [PackageConfig]
allExposedPackageConfigs df = filter exposed $ eltsUFM $ pkgIdMap $ pkgState df
allExposedModules :: DynFlags -> [ModuleName]
allExposedModules df = concat $ map exposedModules $ allExposedPackageConfigs df
listVisibleModuleNames :: DynFlags -> [ModuleName]
listVisibleModuleNames = allExposedModules
#endif
lookupModulePackageInAllPackages ::
DynFlags -> ModuleName -> [String]
lookupModulePackageInAllPackages df mn =
#if __GLASGOW_HASKELL__ >= 710
unpackSPId . sourcePackageId . snd <$> lookupModuleInAllPackages df mn
where
unpackSPId (SourcePackageId fs) = unpackFS fs
#else
unpackPId . sourcePackageId . fst <$> lookupModuleInAllPackages df mn
where
unpackPId pid = packageIdString $ mkPackageId pid
-- n ++ "-" ++ showVersion v
#endif
listVisibleModules :: DynFlags -> [GHC.Module]
listVisibleModules df = let
#if __GLASGOW_HASKELL__ >= 710
modNames = listVisibleModuleNames df
mods = [ m | mn <- modNames, (m, _) <- lookupModuleInAllPackages df mn ]
#else
pkgCfgs = allExposedPackageConfigs df
mods = [ mkModule pid modname | p <- pkgCfgs
, let pid = packageConfigId p
, modname <- exposedModules p ]
#endif
in mods
isSynTyCon :: TyCon -> Bool
#if __GLASGOW_HASKELL__ >= 710
isSynTyCon = GHC.isTypeSynonymTyCon
#else
isSynTyCon = GHC.isSynTyCon
#endif
parseModuleHeader
:: String -- ^ Haskell module source text (full Unicode is supported)
-> DynFlags
-> FilePath -- ^ the filename (for source locations)
-> Either ErrorMessages (WarningMessages, Located (HsModule RdrName))
parseModuleHeader str dflags filename =
let
loc = mkRealSrcLoc (mkFastString filename) 1 1
buf = stringToStringBuffer str
in
case L.unP Parser.parseHeader (mkPState dflags buf loc) of
PFailed sp err ->
#if __GLASGOW_HASKELL__ >= 706
Left (unitBag (mkPlainErrMsg dflags sp err))
#else
Left (unitBag (mkPlainErrMsg sp err))
#endif
POk pst rdr_module ->
let (warns,_) = getMessages pst in
Right (warns, rdr_module)
mkErrStyle' :: DynFlags -> PrintUnqualified -> PprStyle
#if __GLASGOW_HASKELL__ >= 706
mkErrStyle' = Outputable.mkErrStyle
#else
mkErrStyle' _ = Outputable.mkErrStyle
#endif
#if __GLASGOW_HASKELL__ < 706
instance NFData ByteString where
rnf Empty = ()
rnf (Chunk _ b) = rnf b
#endif
-- | Like 'everything', but avoid known potholes, based on the 'Stage' that
-- generated the Ast.
everythingStagedWithContext :: Stage -> s -> (r -> r -> r) -> r -> GenericQ (s -> (r, s)) -> GenericQ r
everythingStagedWithContext stage s0 f z q x
| (const False
#if __GLASGOW_HASKELL__ <= 708
`extQ` postTcType
#endif
`extQ` fixity `extQ` nameSet) x = z
| otherwise = foldl f r (gmapQ (everythingStagedWithContext stage s' f z q) x)
where nameSet = const (stage `elem` [Parser,TypeChecker]) :: NameSet -> Bool
#if __GLASGOW_HASKELL__ <= 708
postTcType = const (stage<TypeChecker) :: PostTcType -> Bool
#endif
fixity = const (stage<Renamer) :: GHC.Fixity -> Bool
(r, s') = q x s0
withCleanupSession :: GhcMonad m => m a -> m a
#if __GLASGOW_HASKELL__ >= 800
#if MIN_VERSION_GLASGOW_HASKELL(8,0,1,20161117)
withCleanupSession = GHC.withCleanupSession
#else
withCleanupSession ghc = ghc `gfinally` cleanup
where
cleanup = do
hsc_env <- getSession
let dflags = hsc_dflags hsc_env
liftIO $ do
cleanTempFiles dflags
cleanTempDirs dflags
stopIServ hsc_env
#endif
#else
withCleanupSession action = do
df <- getSessionDynFlags
GHC.defaultCleanupHandler df action
#endif