ghc-7.8.2: The GHC API

Safe Haskell | None
Language | Haskell98

TcRnMonad

Synopsis

- initTc :: HscEnv -> HscSource -> Bool -> Module -> TcM r -> IO (Messages, Maybe r)
- initTcInteractive :: HscEnv -> TcM a -> IO (Messages, Maybe a)
- initTcForLookup :: HscEnv -> TcM a -> IO a
- initTcRnIf :: Char -> HscEnv -> gbl -> lcl -> TcRnIf gbl lcl a -> IO a
- discardResult :: TcM a -> TcM ()
- getTopEnv :: TcRnIf gbl lcl HscEnv
- getGblEnv :: TcRnIf gbl lcl gbl
- updGblEnv :: (gbl -> gbl) -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- setGblEnv :: gbl -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- getLclEnv :: TcRnIf gbl lcl lcl
- updLclEnv :: (lcl -> lcl) -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- setLclEnv :: lcl' -> TcRnIf gbl lcl' a -> TcRnIf gbl lcl a
- getEnvs :: TcRnIf gbl lcl (gbl, lcl)
- setEnvs :: (gbl', lcl') -> TcRnIf gbl' lcl' a -> TcRnIf gbl lcl a
- xoptM :: ExtensionFlag -> TcRnIf gbl lcl Bool
- doptM :: DumpFlag -> TcRnIf gbl lcl Bool
- goptM :: GeneralFlag -> TcRnIf gbl lcl Bool
- woptM :: WarningFlag -> TcRnIf gbl lcl Bool
- setXOptM :: ExtensionFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- unsetGOptM :: GeneralFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- unsetWOptM :: WarningFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- whenDOptM :: DumpFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()
- whenGOptM :: GeneralFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()
- whenWOptM :: WarningFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()
- whenXOptM :: ExtensionFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()
- getGhcMode :: TcRnIf gbl lcl GhcMode
- withDoDynamicToo :: TcRnIf gbl lcl a -> TcRnIf gbl lcl a
- getEpsVar :: TcRnIf gbl lcl (TcRef ExternalPackageState)
- getEps :: TcRnIf gbl lcl ExternalPackageState
- updateEps :: (ExternalPackageState -> (ExternalPackageState, a)) -> TcRnIf gbl lcl a
- updateEps_ :: (ExternalPackageState -> ExternalPackageState) -> TcRnIf gbl lcl ()
- getHpt :: TcRnIf gbl lcl HomePackageTable
- getEpsAndHpt :: TcRnIf gbl lcl (ExternalPackageState, HomePackageTable)
- newUnique :: TcRnIf gbl lcl Unique
- newUniqueSupply :: TcRnIf gbl lcl UniqSupply
- newLocalName :: Name -> TcM Name
- newName :: OccName -> TcM Name
- newSysName :: OccName -> TcM Name
- newSysLocalIds :: FastString -> [TcType] -> TcRnIf gbl lcl [TcId]
- newTcRef :: a -> TcRnIf gbl lcl (TcRef a)
- readTcRef :: TcRef a -> TcRnIf gbl lcl a
- writeTcRef :: TcRef a -> a -> TcRnIf gbl lcl ()
- updTcRef :: TcRef a -> (a -> a) -> TcRnIf gbl lcl ()
- traceTc :: String -> SDoc -> TcRn ()
- traceTcN :: Int -> String -> SDoc -> TcRn ()
- traceRn :: SDoc -> TcRn ()
- traceSplice :: SDoc -> TcRn ()
- traceIf :: SDoc -> TcRnIf m n ()
- traceHiDiffs :: SDoc -> TcRnIf m n ()
- traceOptIf :: DumpFlag -> SDoc -> TcRnIf m n ()
- traceOptTcRn :: DumpFlag -> SDoc -> TcRn ()
- dumpTcRn :: SDoc -> TcRn ()
- debugDumpTcRn :: SDoc -> TcRn ()
- dumpOptTcRn :: DumpFlag -> SDoc -> TcRn ()
- setModule :: Module -> TcRn a -> TcRn a
- getIsGHCi :: TcRn Bool
- getGHCiMonad :: TcRn Name
- getInteractivePrintName :: TcRn Name
- tcIsHsBoot :: TcRn Bool
- getGlobalRdrEnv :: TcRn GlobalRdrEnv
- getRdrEnvs :: TcRn (GlobalRdrEnv, LocalRdrEnv)
- getImports :: TcRn ImportAvails
- getFixityEnv :: TcRn FixityEnv
- extendFixityEnv :: [(Name, FixItem)] -> RnM a -> RnM a
- getRecFieldEnv :: TcRn RecFieldEnv
- getDeclaredDefaultTys :: TcRn (Maybe [Type])
- addDependentFiles :: [FilePath] -> TcRn ()
- getSrcSpanM :: TcRn SrcSpan
- setSrcSpan :: SrcSpan -> TcRn a -> TcRn a
- addLocM :: (a -> TcM b) -> Located a -> TcM b
- wrapLocM :: (a -> TcM b) -> Located a -> TcM (Located b)
- wrapOriginLocM :: (a -> TcM r) -> (Origin, Located a) -> TcM (Origin, Located r)
- wrapLocFstM :: (a -> TcM (b, c)) -> Located a -> TcM (Located b, c)
- wrapLocSndM :: (a -> TcM (b, c)) -> Located a -> TcM (b, Located c)
- getErrsVar :: TcRn (TcRef Messages)
- setErrsVar :: TcRef Messages -> TcRn a -> TcRn a
- addErr :: MsgDoc -> TcRn ()
- failWith :: MsgDoc -> TcRn a
- addErrAt :: SrcSpan -> MsgDoc -> TcRn ()
- addErrs :: [(SrcSpan, MsgDoc)] -> TcRn ()
- checkErr :: Bool -> MsgDoc -> TcRn ()
- warnIf :: Bool -> MsgDoc -> TcRn ()
- addMessages :: Messages -> TcRn ()
- discardWarnings :: TcRn a -> TcRn a
- mkLongErrAt :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn ErrMsg
- addLongErrAt :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn ()
- reportErrors :: [ErrMsg] -> TcM ()
- reportError :: ErrMsg -> TcRn ()
- reportWarning :: ErrMsg -> TcRn ()
- dumpDerivingInfo :: SDoc -> TcM ()
- try_m :: TcRn r -> TcRn (Either IOEnvFailure r)
- recoverM :: TcRn r -> TcRn r -> TcRn r
- mapAndRecoverM :: (a -> TcRn b) -> [a] -> TcRn [b]
- mapAndReportM :: (a -> TcRn b) -> [a] -> TcRn [b]
- tryTc :: TcRn a -> TcRn (Messages, Maybe a)
- tryTcErrs :: TcRn a -> TcRn (Messages, Maybe a)
- tryTcLIE :: TcM a -> TcM (Messages, Maybe a)
- tryTcLIE_ :: TcM r -> TcM r -> TcM r
- checkNoErrs :: TcM r -> TcM r
- ifErrsM :: TcRn r -> TcRn r -> TcRn r
- failIfErrsM :: TcRn ()
- checkTH :: Outputable a => a -> String -> TcRn ()
- failTH :: Outputable a => a -> String -> TcRn x
- getErrCtxt :: TcM [ErrCtxt]
- setErrCtxt :: [ErrCtxt] -> TcM a -> TcM a
- addErrCtxt :: MsgDoc -> TcM a -> TcM a
- addErrCtxtM :: (TidyEnv -> TcM (TidyEnv, MsgDoc)) -> TcM a -> TcM a
- addLandmarkErrCtxt :: MsgDoc -> TcM a -> TcM a
- updCtxt :: ([ErrCtxt] -> [ErrCtxt]) -> TcM a -> TcM a
- popErrCtxt :: TcM a -> TcM a
- getCtLoc :: CtOrigin -> TcM CtLoc
- setCtLoc :: CtLoc -> TcM a -> TcM a
- addErrTc :: MsgDoc -> TcM ()
- addErrsTc :: [MsgDoc] -> TcM ()
- addErrTcM :: (TidyEnv, MsgDoc) -> TcM ()
- mkErrTcM :: (TidyEnv, MsgDoc) -> TcM ErrMsg
- failWithTc :: MsgDoc -> TcM a
- failWithTcM :: (TidyEnv, MsgDoc) -> TcM a
- checkTc :: Bool -> MsgDoc -> TcM ()
- warnTc :: Bool -> MsgDoc -> TcM ()
- addWarnTc :: MsgDoc -> TcM ()
- addWarnTcM :: (TidyEnv, MsgDoc) -> TcM ()
- addWarn :: MsgDoc -> TcRn ()
- addWarnAt :: SrcSpan -> MsgDoc -> TcRn ()
- add_warn :: MsgDoc -> MsgDoc -> TcRn ()
- add_warn_at :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn ()
- tcInitTidyEnv :: TcM TidyEnv
- add_err_tcm :: TidyEnv -> MsgDoc -> SrcSpan -> [ErrCtxt] -> TcM ()
- mkErrInfo :: TidyEnv -> [ErrCtxt] -> TcM SDoc
- mAX_CONTEXTS :: Int
- debugTc :: TcM () -> TcM ()
- newTcEvBinds :: TcM EvBindsVar
- addTcEvBind :: EvBindsVar -> EvVar -> EvTerm -> TcM ()
- getTcEvBinds :: EvBindsVar -> TcM (Bag EvBind)
- chooseUniqueOccTc :: (OccSet -> OccName) -> TcM OccName
- getConstraintVar :: TcM (TcRef WantedConstraints)
- setConstraintVar :: TcRef WantedConstraints -> TcM a -> TcM a
- emitConstraints :: WantedConstraints -> TcM ()
- emitFlat :: Ct -> TcM ()
- emitFlats :: Cts -> TcM ()
- emitImplication :: Implication -> TcM ()
- emitImplications :: Bag Implication -> TcM ()
- emitInsoluble :: Ct -> TcM ()
- captureConstraints :: TcM a -> TcM (a, WantedConstraints)
- captureUntouchables :: TcM a -> TcM (a, Untouchables)
- getUntouchables :: TcM Untouchables
- setUntouchables :: Untouchables -> TcM a -> TcM a
- isTouchableTcM :: TcTyVar -> TcM Bool
- getLclTypeEnv :: TcM TcTypeEnv
- setLclTypeEnv :: TcLclEnv -> TcM a -> TcM a
- traceTcConstraints :: String -> TcM ()
- recordThUse :: TcM ()
- recordThSpliceUse :: TcM ()
- keepAlive :: Name -> TcRn ()
- getStage :: TcM ThStage
- getStageAndBindLevel :: Name -> TcRn (Maybe (TopLevelFlag, ThLevel, ThStage))
- setStage :: ThStage -> TcM a -> TcRn a
- recordUnsafeInfer :: TcM ()
- finalSafeMode :: DynFlags -> TcGblEnv -> IO SafeHaskellMode
- getLocalRdrEnv :: RnM LocalRdrEnv
- setLocalRdrEnv :: LocalRdrEnv -> RnM a -> RnM a
- mkIfLclEnv :: Module -> SDoc -> IfLclEnv
- initIfaceTcRn :: IfG a -> TcRn a
- initIfaceExtCore :: IfL a -> TcRn a
- initIfaceCheck :: HscEnv -> IfG a -> IO a
- initIfaceTc :: ModIface -> (TcRef TypeEnv -> IfL a) -> TcRnIf gbl lcl a
- initIfaceLcl :: Module -> SDoc -> IfL a -> IfM lcl a
- getIfModule :: IfL Module
- failIfM :: MsgDoc -> IfL a
- forkM_maybe :: SDoc -> IfL a -> IfL (Maybe a)
- forkM :: SDoc -> IfL a -> IfL a
- module TcRnTypes
- module IOEnv

# Documentation

initTc :: HscEnv -> HscSource -> Bool -> Module -> TcM r -> IO (Messages, Maybe r)

Setup the initial typechecking environment

initTcInteractive :: HscEnv -> TcM a -> IO (Messages, Maybe a)

initTcForLookup :: HscEnv -> TcM a -> IO a

initTcRnIf :: Char -> HscEnv -> gbl -> lcl -> TcRnIf gbl lcl a -> IO a

discardResult :: TcM a -> TcM ()

getTopEnv :: TcRnIf gbl lcl HscEnv

getGblEnv :: TcRnIf gbl lcl gbl

updGblEnv :: (gbl -> gbl) -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a

setGblEnv :: gbl -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a

getLclEnv :: TcRnIf gbl lcl lcl

updLclEnv :: (lcl -> lcl) -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a

setLclEnv :: lcl' -> TcRnIf gbl lcl' a -> TcRnIf gbl lcl a

getEnvs :: TcRnIf gbl lcl (gbl, lcl)

setEnvs :: (gbl', lcl') -> TcRnIf gbl' lcl' a -> TcRnIf gbl lcl a

xoptM :: ExtensionFlag -> TcRnIf gbl lcl Bool

doptM :: DumpFlag -> TcRnIf gbl lcl Bool

goptM :: GeneralFlag -> TcRnIf gbl lcl Bool

woptM :: WarningFlag -> TcRnIf gbl lcl Bool

setXOptM :: ExtensionFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a

unsetGOptM :: GeneralFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a

unsetWOptM :: WarningFlag -> TcRnIf gbl lcl a -> TcRnIf gbl lcl a

whenDOptM :: DumpFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()

Do it flag is true

whenGOptM :: GeneralFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()

whenWOptM :: WarningFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()

whenXOptM :: ExtensionFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()

getGhcMode :: TcRnIf gbl lcl GhcMode

withDoDynamicToo :: TcRnIf gbl lcl a -> TcRnIf gbl lcl a

getEpsVar :: TcRnIf gbl lcl (TcRef ExternalPackageState)

getEps :: TcRnIf gbl lcl ExternalPackageState

updateEps :: (ExternalPackageState -> (ExternalPackageState, a)) -> TcRnIf gbl lcl a

Update the external package state. Returns the second result of the modifier function.

This is an atomic operation and forces evaluation of the modified EPS in order to avoid space leaks.

updateEps_ :: (ExternalPackageState -> ExternalPackageState) -> TcRnIf gbl lcl ()

Update the external package state.

This is an atomic operation and forces evaluation of the modified EPS in order to avoid space leaks.

getHpt :: TcRnIf gbl lcl HomePackageTable

getEpsAndHpt :: TcRnIf gbl lcl (ExternalPackageState, HomePackageTable)

newUnique :: TcRnIf gbl lcl Unique

newUniqueSupply :: TcRnIf gbl lcl UniqSupply

newLocalName :: Name -> TcM Name

newName :: OccName -> TcM Name

newSysName :: OccName -> TcM Name

newSysLocalIds :: FastString -> [TcType] -> TcRnIf gbl lcl [TcId]

newTcRef :: a -> TcRnIf gbl lcl (TcRef a)

readTcRef :: TcRef a -> TcRnIf gbl lcl a

writeTcRef :: TcRef a -> a -> TcRnIf gbl lcl ()

updTcRef :: TcRef a -> (a -> a) -> TcRnIf gbl lcl ()

traceTc :: String -> SDoc -> TcRn ()

traceTcN :: Int -> String -> SDoc -> TcRn ()

traceRn :: SDoc -> TcRn ()

traceSplice :: SDoc -> TcRn ()

traceIf :: SDoc -> TcRnIf m n ()

traceHiDiffs :: SDoc -> TcRnIf m n ()

traceOptIf :: DumpFlag -> SDoc -> TcRnIf m n ()

traceOptTcRn :: DumpFlag -> SDoc -> TcRn ()

dumpTcRn :: SDoc -> TcRn ()

debugDumpTcRn :: SDoc -> TcRn ()

dumpOptTcRn :: DumpFlag -> SDoc -> TcRn ()

setModule :: Module -> TcRn a -> TcRn a

getIsGHCi :: TcRn Bool

getGHCiMonad :: TcRn Name

getInteractivePrintName :: TcRn Name

tcIsHsBoot :: TcRn Bool

getGlobalRdrEnv :: TcRn GlobalRdrEnv

getRdrEnvs :: TcRn (GlobalRdrEnv, LocalRdrEnv)

getImports :: TcRn ImportAvails

getFixityEnv :: TcRn FixityEnv

extendFixityEnv :: [(Name, FixItem)] -> RnM a -> RnM a

getRecFieldEnv :: TcRn RecFieldEnv

getDeclaredDefaultTys :: TcRn (Maybe [Type])

addDependentFiles :: [FilePath] -> TcRn ()

getSrcSpanM :: TcRn SrcSpan

setSrcSpan :: SrcSpan -> TcRn a -> TcRn a

addLocM :: (a -> TcM b) -> Located a -> TcM b

wrapLocM :: (a -> TcM b) -> Located a -> TcM (Located b)

wrapOriginLocM :: (a -> TcM r) -> (Origin, Located a) -> TcM (Origin, Located r)

wrapLocFstM :: (a -> TcM (b, c)) -> Located a -> TcM (Located b, c)

wrapLocSndM :: (a -> TcM (b, c)) -> Located a -> TcM (b, Located c)

getErrsVar :: TcRn (TcRef Messages)

setErrsVar :: TcRef Messages -> TcRn a -> TcRn a

addErr :: MsgDoc -> TcRn ()

failWith :: MsgDoc -> TcRn a

addErrAt :: SrcSpan -> MsgDoc -> TcRn ()

addErrs :: [(SrcSpan, MsgDoc)] -> TcRn ()

checkErr :: Bool -> MsgDoc -> TcRn ()

warnIf :: Bool -> MsgDoc -> TcRn ()

addMessages :: Messages -> TcRn ()

discardWarnings :: TcRn a -> TcRn a

mkLongErrAt :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn ErrMsg

addLongErrAt :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn ()

reportErrors :: [ErrMsg] -> TcM ()

reportError :: ErrMsg -> TcRn ()

reportWarning :: ErrMsg -> TcRn ()

dumpDerivingInfo :: SDoc -> TcM ()

try_m :: TcRn r -> TcRn (Either IOEnvFailure r)

recoverM :: TcRn r -> TcRn r -> TcRn r

mapAndRecoverM :: (a -> TcRn b) -> [a] -> TcRn [b]

mapAndReportM :: (a -> TcRn b) -> [a] -> TcRn [b]

Succeeds if applying the argument to all members of the lists succeeds, but nevertheless runs it on all arguments, to collect all errors.

tryTc :: TcRn a -> TcRn (Messages, Maybe a)

tryTcErrs :: TcRn a -> TcRn (Messages, Maybe a)

tryTcLIE :: TcM a -> TcM (Messages, Maybe a)

tryTcLIE_ :: TcM r -> TcM r -> TcM r

checkNoErrs :: TcM r -> TcM r

ifErrsM :: TcRn r -> TcRn r -> TcRn r

failIfErrsM :: TcRn ()

checkTH :: Outputable a => a -> String -> TcRn ()

failTH :: Outputable a => a -> String -> TcRn x

getErrCtxt :: TcM [ErrCtxt]

setErrCtxt :: [ErrCtxt] -> TcM a -> TcM a

addErrCtxt :: MsgDoc -> TcM a -> TcM a

addErrCtxtM :: (TidyEnv -> TcM (TidyEnv, MsgDoc)) -> TcM a -> TcM a

addLandmarkErrCtxt :: MsgDoc -> TcM a -> TcM a

updCtxt :: ([ErrCtxt] -> [ErrCtxt]) -> TcM a -> TcM a

popErrCtxt :: TcM a -> TcM a

getCtLoc :: CtOrigin -> TcM CtLoc

setCtLoc :: CtLoc -> TcM a -> TcM a

addErrTc :: MsgDoc -> TcM ()

addErrsTc :: [MsgDoc] -> TcM ()

addErrTcM :: (TidyEnv, MsgDoc) -> TcM ()

mkErrTcM :: (TidyEnv, MsgDoc) -> TcM ErrMsg

failWithTc :: MsgDoc -> TcM a

failWithTcM :: (TidyEnv, MsgDoc) -> TcM a

checkTc :: Bool -> MsgDoc -> TcM ()

warnTc :: Bool -> MsgDoc -> TcM ()

addWarnTc :: MsgDoc -> TcM ()

addWarnTcM :: (TidyEnv, MsgDoc) -> TcM ()

addWarn :: MsgDoc -> TcRn ()

addWarnAt :: SrcSpan -> MsgDoc -> TcRn ()

add_warn :: MsgDoc -> MsgDoc -> TcRn ()

add_warn_at :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn ()

tcInitTidyEnv :: TcM TidyEnv

add_err_tcm :: TidyEnv -> MsgDoc -> SrcSpan -> [ErrCtxt] -> TcM ()

mkErrInfo :: TidyEnv -> [ErrCtxt] -> TcM SDoc

mAX_CONTEXTS :: Int

debugTc :: TcM () -> TcM ()

newTcEvBinds :: TcM EvBindsVar

addTcEvBind :: EvBindsVar -> EvVar -> EvTerm -> TcM ()

getTcEvBinds :: EvBindsVar -> TcM (Bag EvBind)

chooseUniqueOccTc :: (OccSet -> OccName) -> TcM OccName

getConstraintVar :: TcM (TcRef WantedConstraints)

setConstraintVar :: TcRef WantedConstraints -> TcM a -> TcM a

emitConstraints :: WantedConstraints -> TcM ()

emitFlat :: Ct -> TcM ()

emitFlats :: Cts -> TcM ()

emitImplication :: Implication -> TcM ()

emitImplications :: Bag Implication -> TcM ()

emitInsoluble :: Ct -> TcM ()

captureConstraints :: TcM a -> TcM (a, WantedConstraints)

captureUntouchables :: TcM a -> TcM (a, Untouchables)

getUntouchables :: TcM Untouchables

setUntouchables :: Untouchables -> TcM a -> TcM a

isTouchableTcM :: TcTyVar -> TcM Bool

getLclTypeEnv :: TcM TcTypeEnv

setLclTypeEnv :: TcLclEnv -> TcM a -> TcM a

traceTcConstraints :: String -> TcM ()

recordThUse :: TcM ()

recordThSpliceUse :: TcM ()

keepAlive :: Name -> TcRn ()

getStage :: TcM ThStage

getStageAndBindLevel :: Name -> TcRn (Maybe (TopLevelFlag, ThLevel, ThStage))

setStage :: ThStage -> TcM a -> TcRn a

recordUnsafeInfer :: TcM ()

Mark that safe inference has failed

finalSafeMode :: DynFlags -> TcGblEnv -> IO SafeHaskellMode

Figure out the final correct safe haskell mode

getLocalRdrEnv :: RnM LocalRdrEnv

setLocalRdrEnv :: LocalRdrEnv -> RnM a -> RnM a

mkIfLclEnv :: Module -> SDoc -> IfLclEnv

initIfaceTcRn :: IfG a -> TcRn a

initIfaceExtCore :: IfL a -> TcRn a

initIfaceCheck :: HscEnv -> IfG a -> IO a

initIfaceTc :: ModIface -> (TcRef TypeEnv -> IfL a) -> TcRnIf gbl lcl a

initIfaceLcl :: Module -> SDoc -> IfL a -> IfM lcl a

getIfModule :: IfL Module

failIfM :: MsgDoc -> IfL a

forkM_maybe :: SDoc -> IfL a -> IfL (Maybe a)

forkM :: SDoc -> IfL a -> IfL a

module TcRnTypes

module IOEnv