ghc-6.12.3: The GHC APISource codeContentsIndex
GHC
Contents
Initialisation
GHC Monad
Flags and settings
Targets
Extending the program scope
Loading/compiling the program
Inspecting the module structure of the program
Inspecting modules
Querying the environment
Printing
Interactive evaluation
Abstract syntax elements
Packages
Modules
Names
Identifiers
Type constructors
Type variables
Data constructors
Classes
Instances
Types and Kinds
Entities
Syntax
Fixities
Source locations
Located
Constructing Located
Deconstructing Located
Combining and comparing Located values
Exceptions
Token stream manipulations
Miscellaneous
Synopsis
defaultErrorHandler :: (ExceptionMonad m, MonadIO m) => DynFlags -> m a -> m a
defaultCleanupHandler :: (ExceptionMonad m, MonadIO m) => DynFlags -> m a -> m a
data Ghc a
data GhcT m a
class (Functor m, MonadIO m, WarnLogMonad m, ExceptionMonad m) => GhcMonad m where
getSession :: m HscEnv
setSession :: HscEnv -> m ()
runGhc :: Maybe FilePath -> Ghc a -> IO a
runGhcT :: (ExceptionMonad m, Functor m, MonadIO m) => Maybe FilePath -> GhcT m a -> m a
initGhcMonad :: GhcMonad m => Maybe FilePath -> m ()
gcatch :: (ExceptionMonad m, Exception e) => m a -> (e -> m a) -> m a
gbracket :: ExceptionMonad m => m a -> (a -> m b) -> (a -> m c) -> m c
gfinally :: ExceptionMonad m => m a -> m b -> m a
clearWarnings :: WarnLogMonad m => m ()
getWarnings :: WarnLogMonad m => m WarningMessages
hasWarnings :: WarnLogMonad m => m Bool
printExceptionAndWarnings :: GhcMonad m => SourceError -> m ()
printWarnings :: GhcMonad m => m ()
handleSourceError :: ExceptionMonad m => (SourceError -> m a) -> m a -> m a
defaultCallbacks :: GhcApiCallbacks
data GhcApiCallbacks = GhcApiCallbacks {
reportModuleCompilationResult :: GhcMonad m => ModSummary -> Maybe SourceError -> m ()
}
needsTemplateHaskell :: ModuleGraph -> Bool
data DynFlags = DynFlags {
ghcMode :: GhcMode
ghcLink :: GhcLink
coreToDo :: Maybe [CoreToDo]
stgToDo :: Maybe [StgToDo]
hscTarget :: HscTarget
hscOutName :: String
extCoreName :: String
verbosity :: Int
optLevel :: Int
simplPhases :: Int
maxSimplIterations :: Int
shouldDumpSimplPhase :: SimplifierMode -> Bool
ruleCheck :: Maybe String
specConstrThreshold :: Maybe Int
specConstrCount :: Maybe Int
liberateCaseThreshold :: Maybe Int
targetPlatform :: Platform
stolen_x86_regs :: Int
cmdlineHcIncludes :: [String]
importPaths :: [FilePath]
mainModIs :: Module
mainFunIs :: Maybe String
ctxtStkDepth :: Int
dphBackend :: DPHBackend
thisPackage :: PackageId
ways :: [Way]
buildTag :: String
rtsBuildTag :: String
splitInfo :: Maybe (String, Int)
objectDir :: Maybe String
hiDir :: Maybe String
stubDir :: Maybe String
objectSuf :: String
hcSuf :: String
hiSuf :: String
outputFile :: Maybe String
outputHi :: Maybe String
dynLibLoader :: DynLibLoader
dumpPrefix :: Maybe FilePath
dumpPrefixForce :: Maybe FilePath
includePaths :: [String]
libraryPaths :: [String]
frameworkPaths :: [String]
cmdlineFrameworks :: [String]
tmpDir :: String
ghcUsagePath :: FilePath
ghciUsagePath :: FilePath
hpcDir :: String
opt_L :: [String]
opt_P :: [String]
opt_F :: [String]
opt_c :: [String]
opt_m :: [String]
opt_a :: [String]
opt_l :: [String]
opt_windres :: [String]
pgm_L :: String
pgm_P :: (String, [Option])
pgm_F :: String
pgm_c :: (String, [Option])
pgm_m :: (String, [Option])
pgm_s :: (String, [Option])
pgm_a :: (String, [Option])
pgm_l :: (String, [Option])
pgm_dll :: (String, [Option])
pgm_T :: String
pgm_sysman :: String
pgm_windres :: String
depMakefile :: FilePath
depIncludePkgDeps :: Bool
depExcludeMods :: [ModuleName]
depSuffixes :: [String]
extraPkgConfs :: [FilePath]
topDir :: FilePath
systemPackageConfig :: FilePath
packageFlags :: [PackageFlag]
pkgDatabase :: Maybe [PackageConfig]
pkgState :: PackageState
filesToClean :: IORef [FilePath]
dirsToClean :: IORef (FiniteMap FilePath FilePath)
flags :: [DynFlag]
log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
haddockOptions :: Maybe String
}
data DynFlag
= Opt_D_dump_cmm
| Opt_D_dump_cmmz
| Opt_D_dump_cmmz_pretty
| Opt_D_dump_cps_cmm
| Opt_D_dump_cvt_cmm
| Opt_D_dump_asm
| Opt_D_dump_asm_native
| Opt_D_dump_asm_liveness
| Opt_D_dump_asm_coalesce
| Opt_D_dump_asm_regalloc
| Opt_D_dump_asm_regalloc_stages
| Opt_D_dump_asm_conflicts
| Opt_D_dump_asm_stats
| Opt_D_dump_asm_expanded
| Opt_D_dump_cpranal
| Opt_D_dump_deriv
| Opt_D_dump_ds
| Opt_D_dump_flatC
| Opt_D_dump_foreign
| Opt_D_dump_inlinings
| Opt_D_dump_rule_firings
| Opt_D_dump_occur_anal
| Opt_D_dump_parsed
| Opt_D_dump_rn
| Opt_D_dump_simpl
| Opt_D_dump_simpl_iterations
| Opt_D_dump_simpl_phases
| Opt_D_dump_spec
| Opt_D_dump_prep
| Opt_D_dump_stg
| Opt_D_dump_stranal
| Opt_D_dump_tc
| Opt_D_dump_types
| Opt_D_dump_rules
| Opt_D_dump_cse
| Opt_D_dump_worker_wrapper
| Opt_D_dump_rn_trace
| Opt_D_dump_rn_stats
| Opt_D_dump_opt_cmm
| Opt_D_dump_simpl_stats
| Opt_D_dump_tc_trace
| Opt_D_dump_if_trace
| Opt_D_dump_splices
| Opt_D_dump_BCOs
| Opt_D_dump_vect
| Opt_D_dump_hpc
| Opt_D_dump_rtti
| Opt_D_source_stats
| Opt_D_verbose_core2core
| Opt_D_verbose_stg2stg
| Opt_D_dump_hi
| Opt_D_dump_hi_diffs
| Opt_D_dump_minimal_imports
| Opt_D_dump_mod_cycles
| Opt_D_dump_view_pattern_commoning
| Opt_D_faststring_stats
| Opt_DumpToFile
| Opt_D_no_debug_output
| Opt_DoCoreLinting
| Opt_DoStgLinting
| Opt_DoCmmLinting
| Opt_DoAsmLinting
| Opt_WarnIsError
| Opt_WarnDuplicateExports
| Opt_WarnHiShadows
| Opt_WarnImplicitPrelude
| Opt_WarnIncompletePatterns
| Opt_WarnIncompletePatternsRecUpd
| Opt_WarnMissingFields
| Opt_WarnMissingMethods
| Opt_WarnMissingSigs
| Opt_WarnNameShadowing
| Opt_WarnOverlappingPatterns
| Opt_WarnSimplePatterns
| Opt_WarnTypeDefaults
| Opt_WarnMonomorphism
| Opt_WarnUnusedBinds
| Opt_WarnUnusedImports
| Opt_WarnUnusedMatches
| Opt_WarnWarningsDeprecations
| Opt_WarnDeprecatedFlags
| Opt_WarnDodgyExports
| Opt_WarnDodgyImports
| Opt_WarnOrphans
| Opt_WarnTabs
| Opt_WarnUnrecognisedPragmas
| Opt_WarnDodgyForeignImports
| Opt_WarnLazyUnliftedBindings
| Opt_WarnUnusedDoBind
| Opt_WarnWrongDoBind
| Opt_OverlappingInstances
| Opt_UndecidableInstances
| Opt_IncoherentInstances
| Opt_MonomorphismRestriction
| Opt_MonoPatBinds
| Opt_MonoLocalBinds
| Opt_ExtendedDefaultRules
| Opt_ForeignFunctionInterface
| Opt_UnliftedFFITypes
| Opt_GHCForeignImportPrim
| Opt_PArr
| Opt_Arrows
| Opt_TemplateHaskell
| Opt_QuasiQuotes
| Opt_ImplicitParams
| Opt_Generics
| Opt_ImplicitPrelude
| Opt_ScopedTypeVariables
| Opt_UnboxedTuples
| Opt_BangPatterns
| Opt_TypeFamilies
| Opt_OverloadedStrings
| Opt_DisambiguateRecordFields
| Opt_RecordWildCards
| Opt_RecordPuns
| Opt_ViewPatterns
| Opt_GADTs
| Opt_RelaxedPolyRec
| Opt_NPlusKPatterns
| Opt_StandaloneDeriving
| Opt_DeriveDataTypeable
| Opt_DeriveFunctor
| Opt_DeriveTraversable
| Opt_DeriveFoldable
| Opt_TypeSynonymInstances
| Opt_FlexibleContexts
| Opt_FlexibleInstances
| Opt_ConstrainedClassMethods
| Opt_MultiParamTypeClasses
| Opt_FunctionalDependencies
| Opt_UnicodeSyntax
| Opt_PolymorphicComponents
| Opt_ExistentialQuantification
| Opt_MagicHash
| Opt_EmptyDataDecls
| Opt_KindSignatures
| Opt_ParallelListComp
| Opt_TransformListComp
| Opt_GeneralizedNewtypeDeriving
| Opt_RecursiveDo
| Opt_DoRec
| Opt_PostfixOperators
| Opt_TupleSections
| Opt_PatternGuards
| Opt_LiberalTypeSynonyms
| Opt_Rank2Types
| Opt_RankNTypes
| Opt_ImpredicativeTypes
| Opt_TypeOperators
| Opt_PackageImports
| Opt_NewQualifiedOperators
| Opt_ExplicitForAll
| Opt_PrintExplicitForalls
| Opt_Strictness
| Opt_FullLaziness
| Opt_StaticArgumentTransformation
| Opt_CSE
| Opt_LiberateCase
| Opt_SpecConstr
| Opt_IgnoreInterfacePragmas
| Opt_OmitInterfacePragmas
| Opt_DoLambdaEtaExpansion
| Opt_IgnoreAsserts
| Opt_DoEtaReduction
| Opt_CaseMerge
| Opt_UnboxStrictFields
| Opt_MethodSharing
| Opt_DictsCheap
| Opt_InlineIfEnoughArgs
| Opt_EnableRewriteRules
| Opt_Vectorise
| Opt_RegsGraph
| Opt_RegsIterative
| Opt_AutoSccsOnAllToplevs
| Opt_AutoSccsOnExportedToplevs
| Opt_AutoSccsOnIndividualCafs
| Opt_Cpp
| Opt_Pp
| Opt_ForceRecomp
| Opt_DryRun
| Opt_DoAsmMangling
| Opt_ExcessPrecision
| Opt_EagerBlackHoling
| Opt_ReadUserPackageConf
| Opt_NoHsMain
| Opt_RtsOptsEnabled
| Opt_SplitObjs
| Opt_StgStats
| Opt_HideAllPackages
| Opt_PrintBindResult
| Opt_Haddock
| Opt_HaddockOptions
| Opt_Hpc_No_Auto
| Opt_BreakOnException
| Opt_BreakOnError
| Opt_PrintEvldWithShow
| Opt_PrintBindContents
| Opt_GenManifest
| Opt_EmbedManifest
| Opt_EmitExternalCore
| Opt_SharedImplib
| Opt_BuildingCabalPackage
| Opt_RunCPS
| Opt_RunCPSZ
| Opt_ConvertToZipCfgAndBack
| Opt_AutoLinkPackages
| Opt_ImplicitImportQualified
| Opt_TryNewCodeGen
| Opt_KeepHiDiffs
| Opt_KeepHcFiles
| Opt_KeepSFiles
| Opt_KeepRawSFiles
| Opt_KeepTmpFiles
| Opt_KeepRawTokenStream
data Severity
= SevInfo
| SevWarning
| SevError
| SevFatal
data HscTarget
= HscC
| HscAsm
| HscJava
| HscInterpreted
| HscNothing
dopt :: DynFlag -> DynFlags -> Bool
data GhcMode
= CompManager
| OneShot
| MkDepend
data GhcLink
= NoLink
| LinkBinary
| LinkInMemory
| LinkDynLib
defaultObjectTarget :: HscTarget
parseDynamicFlags :: Monad m => DynFlags -> [Located String] -> m (DynFlags, [Located String], [Located String])
getSessionDynFlags :: GhcMonad m => m DynFlags
setSessionDynFlags :: GhcMonad m => DynFlags -> m [PackageId]
parseStaticFlags :: [Located String] -> IO ([Located String], [Located String])
data Target = Target {
targetId :: TargetId
targetAllowObjCode :: Bool
targetContents :: Maybe (StringBuffer, ClockTime)
}
data TargetId
= TargetModule ModuleName
| TargetFile FilePath (Maybe Phase)
data Phase
setTargets :: GhcMonad m => [Target] -> m ()
getTargets :: GhcMonad m => m [Target]
addTarget :: GhcMonad m => Target -> m ()
removeTarget :: GhcMonad m => TargetId -> m ()
guessTarget :: GhcMonad m => String -> Maybe Phase -> m Target
extendGlobalRdrScope :: GhcMonad m => [GlobalRdrElt] -> m ()
setGlobalRdrScope :: GhcMonad m => [GlobalRdrElt] -> m ()
extendGlobalTypeScope :: GhcMonad m => [Id] -> m ()
setGlobalTypeScope :: GhcMonad m => [Id] -> m ()
depanal :: GhcMonad m => [ModuleName] -> Bool -> m ModuleGraph
load :: GhcMonad m => LoadHowMuch -> m SuccessFlag
loadWithLogger :: GhcMonad m => WarnErrLogger -> LoadHowMuch -> m SuccessFlag
data LoadHowMuch
= LoadAllTargets
| LoadUpTo ModuleName
| LoadDependenciesOf ModuleName
data SuccessFlag
= Succeeded
| Failed
succeeded :: SuccessFlag -> Bool
failed :: SuccessFlag -> Bool
defaultWarnErrLogger :: WarnErrLogger
type WarnErrLogger = GhcMonad m => Maybe SourceError -> m ()
workingDirectoryChanged :: GhcMonad m => m ()
parseModule :: GhcMonad m => ModSummary -> m ParsedModule
typecheckModule :: GhcMonad m => ParsedModule -> m TypecheckedModule
desugarModule :: GhcMonad m => TypecheckedModule -> m DesugaredModule
loadModule :: (TypecheckedMod mod, GhcMonad m) => mod -> m mod
data ParsedModule = ParsedModule {
pm_mod_summary :: ModSummary
pm_parsed_source :: ParsedSource
}
data TypecheckedModule = TypecheckedModule {
tm_parsed_module :: ParsedModule
tm_renamed_source :: Maybe RenamedSource
tm_typechecked_source :: TypecheckedSource
tm_checked_module_info :: ModuleInfo
tm_internals_ :: (TcGblEnv, ModDetails)
}
data DesugaredModule = DesugaredModule {
dm_typechecked_module :: TypecheckedModule
dm_core_module :: ModGuts
}
type TypecheckedSource = LHsBinds Id
type ParsedSource = Located (HsModule RdrName)
type RenamedSource = (HsGroup Name, [LImportDecl Name], Maybe [LIE Name], Maybe LHsDocString)
class ParsedMod m => TypecheckedMod m where
renamedSource :: m -> Maybe RenamedSource
typecheckedSource :: m -> TypecheckedSource
moduleInfo :: m -> ModuleInfo
class ParsedMod m where
parsedSource :: m -> ParsedSource
coreModule :: DesugaredMod m => m -> ModGuts
compileToCoreModule :: GhcMonad m => FilePath -> m CoreModule
compileToCoreSimplified :: GhcMonad m => FilePath -> m CoreModule
compileCoreToObj :: GhcMonad m => Bool -> CoreModule -> m ()
getModSummary :: GhcMonad m => ModuleName -> m ModSummary
type ModuleGraph = [ModSummary]
data ModSummary = ModSummary {
ms_mod :: Module
ms_hsc_src :: HscSource
ms_location :: ModLocation
ms_hs_date :: ClockTime
ms_obj_date :: Maybe ClockTime
ms_srcimps :: [Located (ImportDecl RdrName)]
ms_imps :: [Located (ImportDecl RdrName)]
ms_hspp_file :: FilePath
ms_hspp_opts :: DynFlags
ms_hspp_buf :: Maybe StringBuffer
}
ms_mod_name :: ModSummary -> ModuleName
data ModLocation = ModLocation {
ml_hs_file :: Maybe FilePath
ml_hi_file :: FilePath
ml_obj_file :: FilePath
}
getModuleGraph :: GhcMonad m => m ModuleGraph
isLoaded :: GhcMonad m => ModuleName -> m Bool
topSortModuleGraph :: Bool -> [ModSummary] -> Maybe ModuleName -> [SCC ModSummary]
data ModuleInfo
getModuleInfo :: GhcMonad m => Module -> m (Maybe ModuleInfo)
modInfoTyThings :: ModuleInfo -> [TyThing]
modInfoTopLevelScope :: ModuleInfo -> Maybe [Name]
modInfoExports :: ModuleInfo -> [Name]
modInfoInstances :: ModuleInfo -> [Instance]
modInfoIsExportedName :: ModuleInfo -> Name -> Bool
modInfoLookupName :: GhcMonad m => ModuleInfo -> Name -> m (Maybe TyThing)
lookupGlobalName :: GhcMonad m => Name -> m (Maybe TyThing)
findGlobalAnns :: (GhcMonad m, Typeable a) => ([Word8] -> a) -> AnnTarget Name -> m [a]
mkPrintUnqualifiedForModule :: GhcMonad m => ModuleInfo -> m (Maybe PrintUnqualified)
packageDbModules :: GhcMonad m => Bool -> m [Module]
type PrintUnqualified = (QueryQualifyName, QueryQualifyModule)
alwaysQualify :: PrintUnqualified
getBindings :: GhcMonad m => m [TyThing]
getPrintUnqual :: GhcMonad m => m PrintUnqualified
findModule :: GhcMonad m => ModuleName -> Maybe FastString -> m Module
lookupModule :: GhcMonad m => ModuleName -> Maybe FastString -> m Module
setContext :: GhcMonad m => [Module] -> [Module] -> m ()
getContext :: GhcMonad m => m ([Module], [Module])
getNamesInScope :: GhcMonad m => m [Name]
getRdrNamesInScope :: GhcMonad m => m [RdrName]
getGRE :: GhcMonad m => m GlobalRdrEnv
moduleIsInterpreted :: GhcMonad m => Module -> m Bool
getInfo :: GhcMonad m => Name -> m (Maybe (TyThing, Fixity, [Instance]))
exprType :: GhcMonad m => String -> m Type
typeKind :: GhcMonad m => String -> m Kind
parseName :: GhcMonad m => String -> m [Name]
data RunResult
= RunOk [Name]
| RunFailed
| RunException SomeException
| RunBreak ThreadId [Name] (Maybe BreakInfo)
runStmt :: GhcMonad m => String -> SingleStep -> m RunResult
data SingleStep
= RunToCompletion
| SingleStep
| RunAndLogSteps
resume :: GhcMonad m => (SrcSpan -> Bool) -> SingleStep -> m RunResult
data Resume
data History
getHistorySpan :: GhcMonad m => History -> m SrcSpan
getHistoryModule :: History -> Module
getResumeContext :: GhcMonad m => m [Resume]
abandon :: GhcMonad m => m Bool
abandonAll :: GhcMonad m => m Bool
back :: GhcMonad m => m ([Name], Int, SrcSpan)
forward :: GhcMonad m => m ([Name], Int, SrcSpan)
showModule :: GhcMonad m => ModSummary -> m String
isModuleInterpreted :: GhcMonad m => ModSummary -> m Bool
compileExpr :: GhcMonad m => String -> m HValue
data HValue
dynCompileExpr :: GhcMonad m => String -> m Dynamic
lookupName :: GhcMonad m => Name -> m (Maybe TyThing)
obtainTermFromId :: GhcMonad m => Int -> Bool -> Id -> m Term
obtainTermFromVal :: GhcMonad m => Int -> Bool -> Type -> a -> m Term
reconstructType :: HscEnv -> Int -> Id -> IO (Maybe Type)
modInfoModBreaks :: ModuleInfo -> ModBreaks
data ModBreaks = ModBreaks {
modBreaks_flags :: BreakArray
modBreaks_locs :: !(Array BreakIndex SrcSpan)
modBreaks_vars :: !(Array BreakIndex [OccName])
}
type BreakIndex = Int
data BreakInfo
data BreakArray
setBreakOn :: BreakArray -> Int -> IO Bool
setBreakOff :: BreakArray -> Int -> IO Bool
getBreak :: BreakArray -> Int -> IO (Maybe Word)
data PackageId
data Module
mkModule :: PackageId -> ModuleName -> Module
pprModule :: Module -> SDoc
moduleName :: Module -> ModuleName
modulePackageId :: Module -> PackageId
data ModuleName
mkModuleName :: String -> ModuleName
moduleNameString :: ModuleName -> String
data Name
isExternalName :: Name -> Bool
nameModule :: Name -> Module
pprParenSymName :: NamedThing a => a -> SDoc
nameSrcSpan :: Name -> SrcSpan
class NamedThing a where
getOccName :: a -> OccName
getName :: a -> Name
data RdrName
= Unqual OccName
| Qual ModuleName OccName
type Id = Var
idType :: Id -> Kind
isImplicitId :: Id -> Bool
isDeadBinder :: Id -> Bool
isExportedId :: Var -> Bool
isLocalId :: Var -> Bool
isGlobalId :: Var -> Bool
isRecordSelector :: Id -> Bool
isPrimOpId :: Id -> Bool
isFCallId :: Id -> Bool
isClassOpId_maybe :: Id -> Maybe Class
isDataConWorkId :: Id -> Bool
idDataCon :: Id -> DataCon
isBottomingId :: Id -> Bool
isDictonaryId :: Id -> Bool
recordSelectorFieldLabel :: Id -> (TyCon, FieldLabel)
data TyCon
tyConTyVars :: TyCon -> [TyVar]
tyConDataCons :: TyCon -> [DataCon]
tyConArity :: TyCon -> Arity
isClassTyCon :: TyCon -> Bool
isSynTyCon :: TyCon -> Bool
isNewTyCon :: TyCon -> Bool
isPrimTyCon :: TyCon -> Bool
isFunTyCon :: TyCon -> Bool
isOpenTyCon :: TyCon -> Bool
synTyConDefn :: TyCon -> ([TyVar], Type)
synTyConType :: TyCon -> Type
synTyConResKind :: TyCon -> Kind
type TyVar = Var
alphaTyVars :: [TyVar]
data DataCon
dataConSig :: DataCon -> ([TyVar], ThetaType, [Type], Type)
dataConType :: DataCon -> Type
dataConTyCon :: DataCon -> TyCon
dataConFieldLabels :: DataCon -> [FieldLabel]
dataConIsInfix :: DataCon -> Bool
isVanillaDataCon :: DataCon -> Bool
dataConStrictMarks :: DataCon -> [StrictnessMark]
data StrictnessMark
= MarkedStrict
| MarkedUnboxed
| NotMarkedStrict
isMarkedStrict :: StrictnessMark -> Bool
data Class
classMethods :: Class -> [Id]
classSCTheta :: Class -> [PredType]
classTvsFds :: Class -> ([TyVar], [FunDep TyVar])
pprFundeps :: Outputable a => [FunDep a] -> SDoc
data Instance
instanceDFunId :: Instance -> DFunId
pprInstance :: Instance -> SDoc
pprInstanceHdr :: Instance -> SDoc
data Type
splitForAllTys :: Type -> ([TyVar], Type)
funResultTy :: Type -> Type
pprParendType :: Type -> SDoc
pprTypeApp :: NamedThing a => a -> [Type] -> SDoc
type Kind = Type
data PredType
type ThetaType = [PredType]
pprThetaArrow :: ThetaType -> SDoc
data TyThing
= AnId Id
| ADataCon DataCon
| ATyCon TyCon
| AClass Class
module HsSyn
data FixityDirection
= InfixL
| InfixR
| InfixN
defaultFixity :: Fixity
maxPrecedence :: Int
negateFixity :: Fixity
compareFixity :: Fixity -> Fixity -> (Bool, Bool)
data SrcLoc
pprDefnLoc :: SrcSpan -> SDoc
mkSrcLoc :: FastString -> Int -> Int -> SrcLoc
isGoodSrcLoc :: SrcLoc -> Bool
noSrcLoc :: SrcLoc
srcLocFile :: SrcLoc -> FastString
srcLocLine :: SrcLoc -> Int
srcLocCol :: SrcLoc -> Int
data SrcSpan
mkSrcSpan :: SrcLoc -> SrcLoc -> SrcSpan
srcLocSpan :: SrcLoc -> SrcSpan
isGoodSrcSpan :: SrcSpan -> Bool
noSrcSpan :: SrcSpan
srcSpanStart :: SrcSpan -> SrcLoc
srcSpanEnd :: SrcSpan -> SrcLoc
srcSpanFile :: SrcSpan -> FastString
srcSpanStartLine :: SrcSpan -> Int
srcSpanEndLine :: SrcSpan -> Int
srcSpanStartCol :: SrcSpan -> Int
srcSpanEndCol :: SrcSpan -> Int
data Located e = L SrcSpan e
noLoc :: e -> Located e
mkGeneralLocated :: String -> e -> Located e
getLoc :: Located e -> SrcSpan
unLoc :: Located e -> e
eqLocated :: Eq a => Located a -> Located a -> Bool
cmpLocated :: Ord a => Located a -> Located a -> Ordering
combineLocs :: Located a -> Located b -> SrcSpan
addCLoc :: Located a -> Located b -> c -> Located c
leftmost_smallest :: SrcSpan -> SrcSpan -> Ordering
leftmost_largest :: SrcSpan -> SrcSpan -> Ordering
rightmost :: SrcSpan -> SrcSpan -> Ordering
spans :: SrcSpan -> (Int, Int) -> Bool
isSubspanOf :: SrcSpan -> SrcSpan -> Bool
data GhcException
= PhaseFailed String ExitCode
| Interrupted
| Signal Int
| UsageError String
| CmdLineError String
| Panic String
| InstallationError String
| ProgramError String
showGhcException :: GhcException -> String -> String
data Token
getTokenStream :: GhcMonad m => Module -> m [Located Token]
getRichTokenStream :: GhcMonad m => Module -> m [(Located Token, String)]
showRichTokenStream :: [(Located Token, String)] -> String
addSourceToTokens :: SrcLoc -> StringBuffer -> [Located Token] -> [(Located Token, String)]
cyclicModuleErr :: [ModSummary] -> SDoc
Initialisation
defaultErrorHandler :: (ExceptionMonad m, MonadIO m) => DynFlags -> m a -> m aSource
Install some default exception handlers and run the inner computation. 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.
defaultCleanupHandler :: (ExceptionMonad m, MonadIO m) => DynFlags -> m a -> m aSource
Install a default cleanup handler to remove temporary files deposited by a GHC run. This is seperate from defaultErrorHandler, because you might want to override the error handling, but still get the ordinary cleanup behaviour.
GHC Monad
data Ghc a Source
A minimal implementation of a GhcMonad. If you need a custom monad, e.g., to maintain additional state consider wrapping this monad or using GhcT.
show/hide Instances
data GhcT m a Source

A monad transformer to add GHC specific features to another monad.

Note that the wrapped monad must support IO and handling of exceptions.

show/hide Instances
class (Functor m, MonadIO m, WarnLogMonad m, ExceptionMonad m) => GhcMonad m whereSource

A monad that has all the features needed by GHC API calls.

In short, a GHC monad

  • allows embedding of IO actions,
  • can log warnings,
  • allows handling of (extensible) exceptions, and
  • maintains a current session.

If you do not use Ghc or GhcT, make sure to call GHC.initGhcMonad before any call to the GHC API functions can occur.

Methods
getSession :: m HscEnvSource
setSession :: HscEnv -> m ()Source
show/hide Instances
runGhcSource
:: Maybe FilePathSee argument to initGhcMonad.
-> Ghc aThe action to perform.
-> IO a

Run function for the Ghc monad.

It initialises the GHC session and warnings via initGhcMonad. Each call to this function will create a new session which should not be shared among several threads.

Any errors not handled inside the Ghc action are propagated as IO exceptions.

runGhcTSource
:: (ExceptionMonad m, Functor m, MonadIO m)
=> Maybe FilePathSee argument to initGhcMonad.
-> GhcT m aThe action to perform.
-> m a

Run function for GhcT monad transformer.

It initialises the GHC session and warnings via initGhcMonad. Each call to this function will create a new session which should not be shared among several threads.

initGhcMonad :: GhcMonad m => Maybe FilePath -> m ()Source

Initialise a GHC session.

If you implement a custom GhcMonad you must call this function in the monad run function. It will initialise the session variable and clear all warnings.

The first argument should point to the directory where GHC's library files reside. More precisely, this should be the output of ghc --print-libdir of the version of GHC the module using this API is compiled with. For portability, you should use the ghc-paths package, available at http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ghc-paths.

gcatch :: (ExceptionMonad m, Exception e) => m a -> (e -> m a) -> m aSource
Generalised version of catch, allowing an arbitrary exception handling monad instead of just IO.
gbracket :: ExceptionMonad m => m a -> (a -> m b) -> (a -> m c) -> m cSource
Generalised version of bracket, allowing an arbitrary exception handling monad instead of just IO.
gfinally :: ExceptionMonad m => m a -> m b -> m aSource
Generalised version of finally, allowing an arbitrary exception handling monad instead of just IO.
clearWarnings :: WarnLogMonad m => m ()Source
Clear the log of Warnings.
getWarnings :: WarnLogMonad m => m WarningMessagesSource
hasWarnings :: WarnLogMonad m => m BoolSource
Returns true if there were any warnings.
printExceptionAndWarnings :: GhcMonad m => SourceError -> m ()Source
Print the error message and all warnings. Useful inside exception handlers. Clears warnings after printing.
printWarnings :: GhcMonad m => m ()Source
Print all accumulated warnings using log_action.
handleSourceErrorSource
:: ExceptionMonad m
=> SourceError -> m aexception handler
-> m aaction to perform
-> m a
Perform the given action and call the exception handler if the action throws a SourceError. See SourceError for more information.
defaultCallbacks :: GhcApiCallbacksSource
data GhcApiCallbacks Source

These functions are called in various places of the GHC API.

API clients can override any of these callbacks to change GHC's default behaviour.

Constructors
GhcApiCallbacks
reportModuleCompilationResult :: GhcMonad m => ModSummary -> Maybe SourceError -> m ()

Called by load after the compilating of each module.

The default implementation simply prints all warnings and errors to stderr. Don't forget to call clearWarnings when implementing your own call.

The first argument is the module that was compiled.

The second argument is Nothing if no errors occured, but there may have been warnings. If it is Just err at least one error has occured. If srcErrorMessages is empty, compilation failed due to -Werror.

needsTemplateHaskell :: ModuleGraph -> BoolSource

Determines whether a set of modules requires Template Haskell.

Note that if the session's DynFlags enabled Template Haskell when depanal was called, then each module in the returned module graph will have Template Haskell enabled whether it is actually needed or not.

Flags and settings
data DynFlags Source
Contains not only a collection of DynFlags but also a plethora of information relating to the compilation of a single file or GHC session
Constructors
DynFlags
ghcMode :: GhcMode
ghcLink :: GhcLink
coreToDo :: Maybe [CoreToDo]
stgToDo :: Maybe [StgToDo]
hscTarget :: HscTarget
hscOutName :: StringName of the output file
extCoreName :: StringName of the .hcr output file
verbosity :: IntVerbosity level: see DynFlags
optLevel :: IntOptimisation level
simplPhases :: IntNumber of simplifier phases
maxSimplIterations :: IntMax simplifier iterations
shouldDumpSimplPhase :: SimplifierMode -> Bool
ruleCheck :: Maybe String
specConstrThreshold :: Maybe IntThreshold for SpecConstr
specConstrCount :: Maybe IntMax number of specialisations for any one function
liberateCaseThreshold :: Maybe IntThreshold for LiberateCase
targetPlatform :: PlatformThe platform we're compiling for. Used by the NCG.
stolen_x86_regs :: Int
cmdlineHcIncludes :: [String]
-#includes
importPaths :: [FilePath]
mainModIs :: Module
mainFunIs :: Maybe String
ctxtStkDepth :: IntTypechecker context stack depth
dphBackend :: DPHBackend
thisPackage :: PackageIdname of package currently being compiled
ways :: [Way]Way flags from the command line
buildTag :: StringThe global "way" (e.g. "p" for prof)
rtsBuildTag :: StringThe RTS "way"
splitInfo :: Maybe (String, Int)
objectDir :: Maybe String
hiDir :: Maybe String
stubDir :: Maybe String
objectSuf :: String
hcSuf :: String
hiSuf :: String
outputFile :: Maybe String
outputHi :: Maybe String
dynLibLoader :: DynLibLoader
dumpPrefix :: Maybe FilePathThis is set by DriverPipeline.runPipeline based on where its output is going.
dumpPrefixForce :: Maybe FilePathOverride the dumpPrefix set by DriverPipeline.runPipeline. Set by -ddump-file-prefix
includePaths :: [String]
libraryPaths :: [String]
frameworkPaths :: [String]
cmdlineFrameworks :: [String]
tmpDir :: String
ghcUsagePath :: FilePath
ghciUsagePath :: FilePath
hpcDir :: StringPath to store the .mix files
opt_L :: [String]
opt_P :: [String]
opt_F :: [String]
opt_c :: [String]
opt_m :: [String]
opt_a :: [String]
opt_l :: [String]
opt_windres :: [String]
pgm_L :: String
pgm_P :: (String, [Option])
pgm_F :: String
pgm_c :: (String, [Option])
pgm_m :: (String, [Option])
pgm_s :: (String, [Option])
pgm_a :: (String, [Option])
pgm_l :: (String, [Option])
pgm_dll :: (String, [Option])
pgm_T :: String
pgm_sysman :: String
pgm_windres :: String
depMakefile :: FilePath
depIncludePkgDeps :: Bool
depExcludeMods :: [ModuleName]
depSuffixes :: [String]
extraPkgConfs :: [FilePath]
topDir :: FilePath
systemPackageConfig :: FilePathThe -package-conf flags given on the command line, in the order they appeared.
packageFlags :: [PackageFlag]The -package and -hide-package flags from the command-line
pkgDatabase :: Maybe [PackageConfig]
pkgState :: PackageState
filesToClean :: IORef [FilePath]
dirsToClean :: IORef (FiniteMap FilePath FilePath)
flags :: [DynFlag]
log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()Message output action: use ErrUtils instead of this if you can
haddockOptions :: Maybe String
data DynFlag Source
Enumerates the simple on-or-off dynamic flags
Constructors
Opt_D_dump_cmm
Opt_D_dump_cmmz
Opt_D_dump_cmmz_pretty
Opt_D_dump_cps_cmm
Opt_D_dump_cvt_cmm
Opt_D_dump_asm
Opt_D_dump_asm_native
Opt_D_dump_asm_liveness
Opt_D_dump_asm_coalesce
Opt_D_dump_asm_regalloc
Opt_D_dump_asm_regalloc_stages
Opt_D_dump_asm_conflicts
Opt_D_dump_asm_stats
Opt_D_dump_asm_expanded
Opt_D_dump_cpranal
Opt_D_dump_deriv
Opt_D_dump_ds
Opt_D_dump_flatC
Opt_D_dump_foreign
Opt_D_dump_inlinings
Opt_D_dump_rule_firings
Opt_D_dump_occur_anal
Opt_D_dump_parsed
Opt_D_dump_rn
Opt_D_dump_simpl
Opt_D_dump_simpl_iterations
Opt_D_dump_simpl_phases
Opt_D_dump_spec
Opt_D_dump_prep
Opt_D_dump_stg
Opt_D_dump_stranal
Opt_D_dump_tc
Opt_D_dump_types
Opt_D_dump_rules
Opt_D_dump_cse
Opt_D_dump_worker_wrapper
Opt_D_dump_rn_trace
Opt_D_dump_rn_stats
Opt_D_dump_opt_cmm
Opt_D_dump_simpl_stats
Opt_D_dump_tc_trace
Opt_D_dump_if_trace
Opt_D_dump_splices
Opt_D_dump_BCOs
Opt_D_dump_vect
Opt_D_dump_hpc
Opt_D_dump_rtti
Opt_D_source_stats
Opt_D_verbose_core2core
Opt_D_verbose_stg2stg
Opt_D_dump_hi
Opt_D_dump_hi_diffs
Opt_D_dump_minimal_imports
Opt_D_dump_mod_cycles
Opt_D_dump_view_pattern_commoning
Opt_D_faststring_stats
Opt_DumpToFileAppend dump output to files instead of stdout.
Opt_D_no_debug_output
Opt_DoCoreLinting
Opt_DoStgLinting
Opt_DoCmmLinting
Opt_DoAsmLinting
Opt_WarnIsError
Opt_WarnDuplicateExports
Opt_WarnHiShadows
Opt_WarnImplicitPrelude
Opt_WarnIncompletePatterns
Opt_WarnIncompletePatternsRecUpd
Opt_WarnMissingFields
Opt_WarnMissingMethods
Opt_WarnMissingSigs
Opt_WarnNameShadowing
Opt_WarnOverlappingPatterns
Opt_WarnSimplePatterns
Opt_WarnTypeDefaults
Opt_WarnMonomorphism
Opt_WarnUnusedBinds
Opt_WarnUnusedImports
Opt_WarnUnusedMatches
Opt_WarnWarningsDeprecations
Opt_WarnDeprecatedFlags
Opt_WarnDodgyExports
Opt_WarnDodgyImports
Opt_WarnOrphans
Opt_WarnTabs
Opt_WarnUnrecognisedPragmas
Opt_WarnDodgyForeignImports
Opt_WarnLazyUnliftedBindings
Opt_WarnUnusedDoBind
Opt_WarnWrongDoBind
Opt_OverlappingInstances
Opt_UndecidableInstances
Opt_IncoherentInstances
Opt_MonomorphismRestriction
Opt_MonoPatBinds
Opt_MonoLocalBinds
Opt_ExtendedDefaultRules
Opt_ForeignFunctionInterface
Opt_UnliftedFFITypes
Opt_GHCForeignImportPrim
Opt_PArr
Opt_Arrows
Opt_TemplateHaskell
Opt_QuasiQuotes
Opt_ImplicitParams
Opt_Generics
Opt_ImplicitPrelude
Opt_ScopedTypeVariables
Opt_UnboxedTuples
Opt_BangPatterns
Opt_TypeFamilies
Opt_OverloadedStrings
Opt_DisambiguateRecordFields
Opt_RecordWildCards
Opt_RecordPuns
Opt_ViewPatterns
Opt_GADTs
Opt_RelaxedPolyRec
Opt_NPlusKPatterns
Opt_StandaloneDeriving
Opt_DeriveDataTypeable
Opt_DeriveFunctor
Opt_DeriveTraversable
Opt_DeriveFoldable
Opt_TypeSynonymInstances
Opt_FlexibleContexts
Opt_FlexibleInstances
Opt_ConstrainedClassMethods
Opt_MultiParamTypeClasses
Opt_FunctionalDependencies
Opt_UnicodeSyntax
Opt_PolymorphicComponents
Opt_ExistentialQuantification
Opt_MagicHash
Opt_EmptyDataDecls
Opt_KindSignatures
Opt_ParallelListComp
Opt_TransformListComp
Opt_GeneralizedNewtypeDeriving
Opt_RecursiveDo
Opt_DoRec
Opt_PostfixOperators
Opt_TupleSections
Opt_PatternGuards
Opt_LiberalTypeSynonyms
Opt_Rank2Types
Opt_RankNTypes
Opt_ImpredicativeTypes
Opt_TypeOperators
Opt_PackageImports
Opt_NewQualifiedOperators
Opt_ExplicitForAll
Opt_PrintExplicitForalls
Opt_Strictness
Opt_FullLaziness
Opt_StaticArgumentTransformation
Opt_CSE
Opt_LiberateCase
Opt_SpecConstr
Opt_IgnoreInterfacePragmas
Opt_OmitInterfacePragmas
Opt_DoLambdaEtaExpansion
Opt_IgnoreAsserts
Opt_DoEtaReduction
Opt_CaseMerge
Opt_UnboxStrictFields
Opt_MethodSharing
Opt_DictsCheap
Opt_InlineIfEnoughArgs
Opt_EnableRewriteRules
Opt_Vectorise
Opt_RegsGraph
Opt_RegsIterative
Opt_AutoSccsOnAllToplevs
Opt_AutoSccsOnExportedToplevs
Opt_AutoSccsOnIndividualCafs
Opt_Cpp
Opt_Pp
Opt_ForceRecomp
Opt_DryRun
Opt_DoAsmMangling
Opt_ExcessPrecision
Opt_EagerBlackHoling
Opt_ReadUserPackageConf
Opt_NoHsMain
Opt_RtsOptsEnabled
Opt_SplitObjs
Opt_StgStats
Opt_HideAllPackages
Opt_PrintBindResult
Opt_Haddock
Opt_HaddockOptions
Opt_Hpc_No_Auto
Opt_BreakOnException
Opt_BreakOnError
Opt_PrintEvldWithShow
Opt_PrintBindContents
Opt_GenManifest
Opt_EmbedManifest
Opt_EmitExternalCore
Opt_SharedImplib
Opt_BuildingCabalPackage
Opt_RunCPS
Opt_RunCPSZ
Opt_ConvertToZipCfgAndBack
Opt_AutoLinkPackages
Opt_ImplicitImportQualified
Opt_TryNewCodeGen
Opt_KeepHiDiffs
Opt_KeepHcFiles
Opt_KeepSFiles
Opt_KeepRawSFiles
Opt_KeepTmpFiles
Opt_KeepRawTokenStream
show/hide Instances
data Severity Source
Constructors
SevInfo
SevWarning
SevError
SevFatal
data HscTarget Source

The target code type of the compilation (if any).

Whenever you change the target, also make sure to set ghcLink to something sensible.

HscNothing can be used to avoid generating any output, however, note that:

  • This will not run the desugaring step, thus no warnings generated in this step will be output. In particular, this includes warnings related to pattern matching. You can run the desugarer manually using GHC.desugarModule.
  • If a program uses Template Haskell the typechecker may try to run code from an imported module. This will fail if no code has been generated for this module. You can use GHC.needsTemplateHaskell to detect whether this might be the case and choose to either switch to a different target or avoid typechecking such modules. (The latter may preferable for security reasons.)
Constructors
HscCGenerate C code.
HscAsmGenerate assembly using the native code generator.
HscJavaGenerate Java bytecode.
HscInterpretedGenerate bytecode. (Requires LinkInMemory)
HscNothingDon't generate any code. See notes above.
show/hide Instances
dopt :: DynFlag -> DynFlags -> BoolSource
Test whether a DynFlag is set
data GhcMode Source
The GhcMode tells us whether we're doing multi-module compilation (controlled via the GHC API) or one-shot (single-module) compilation. This makes a difference primarily to the Finder: in one-shot mode we look for interface files for imported modules, but in multi-module mode we look for source files in order to check whether they need to be recompiled.
Constructors
CompManager--make, GHCi, etc.
OneShot
ghc -c Foo.hs
MkDependghc -M, see Finder for why we need this
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data GhcLink Source
What to do in the link step, if there is one.
Constructors
NoLinkDon't link at all
LinkBinaryLink object code into a binary
LinkInMemoryUse the in-memory dynamic linker (works for both bytecode and object code).
LinkDynLibLink objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
show/hide Instances
defaultObjectTarget :: HscTargetSource
The HscTarget value corresponding to the default way to create object files on the current platform.
parseDynamicFlagsSource
:: Monad m
=> DynFlags
-> [Located String]
-> m (DynFlags, [Located String], [Located String])Updated DynFlags, left-over arguments, and list of warnings.
Parse dynamic flags from a list of command line arguments. Returns the the parsed DynFlags, the left-over arguments, and a list of warnings. Throws a UsageError if errors occurred during parsing (such as unknown flags or missing arguments).
getSessionDynFlags :: GhcMonad m => m DynFlagsSource
Grabs the DynFlags from the Session
setSessionDynFlags :: GhcMonad m => DynFlags -> m [PackageId]Source

Updates the DynFlags in a Session. This also reads the package database (unless it has already been read), and prepares the compilers knowledge about packages. It can be called again to load new packages: just add new package flags to (packageFlags dflags).

Returns a list of new packages that may need to be linked in using the dynamic linker (see linkPackages) as a result of new package flags. If you are not doing linking or doing static linking, you can ignore the list of packages returned.

parseStaticFlags :: [Located String] -> IO ([Located String], [Located String])Source

Parses GHC's static flags from a list of command line arguments.

These flags are static in the sense that they can be set only once and they are global, meaning that they affect every instance of GHC running; multiple GHC threads will use the same flags.

This function must be called before any session is started, i.e., before the first call to GHC.withGhc.

Static flags are more of a hack and are static for more or less historical reasons. In the long run, most static flags should eventually become dynamic flags.

XXX: can we add an auto-generated list of static flags here?

Targets
data Target Source

A compilation target.

A target may be supplied with the actual text of the module. If so, use this instead of the file contents (this is for use in an IDE where the file hasn't been saved by the user yet).

Constructors
Target
targetId :: TargetIdmodule or filename
targetAllowObjCode :: Boolobject code allowed?
targetContents :: Maybe (StringBuffer, ClockTime)in-memory text buffer?
show/hide Instances
data TargetId Source
Constructors
TargetModule ModuleNameA module name: search for the file
TargetFile FilePath (Maybe Phase)A filename: preprocess & parse it to find the module name. If specified, the Phase indicates how to compile this file (which phase to start from). Nothing indicates the starting phase should be determined from the suffix of the filename.
show/hide Instances
data Phase Source
show/hide Instances
setTargets :: GhcMonad m => [Target] -> m ()Source
Sets the targets for this session. Each target may be a module name or a filename. The targets correspond to the set of root modules for the program/library. Unloading the current program is achieved by setting the current set of targets to be empty, followed by load.
getTargets :: GhcMonad m => m [Target]Source
Returns the current set of targets
addTarget :: GhcMonad m => Target -> m ()Source
Add another target.
removeTarget :: GhcMonad m => TargetId -> m ()Source
Remove a target
guessTarget :: GhcMonad m => String -> Maybe Phase -> m TargetSource

Attempts to guess what Target a string refers to. This function implements the --make/GHCi command-line syntax for filenames:

  • if the string looks like a Haskell source filename, then interpret it as such
  • if adding a .hs or .lhs suffix yields the name of an existing file, then use that
  • otherwise interpret the string as a module name
Extending the program scope
extendGlobalRdrScope :: GhcMonad m => [GlobalRdrElt] -> m ()Source
setGlobalRdrScope :: GhcMonad m => [GlobalRdrElt] -> m ()Source
extendGlobalTypeScope :: GhcMonad m => [Id] -> m ()Source
setGlobalTypeScope :: GhcMonad m => [Id] -> m ()Source
Loading/compiling the program
depanalSource
:: GhcMonad m
=> [ModuleName]excluded modules
-> Boolallow duplicate roots
-> m ModuleGraph

Perform a dependency analysis starting from the current targets and update the session with the new module graph.

Dependency analysis entails parsing the import directives and may therefore require running certain preprocessors.

Note that each ModSummary in the module graph caches its DynFlags. These DynFlags are determined by the current session DynFlags and the OPTIONS and LANGUAGE pragmas of the parsed module. Thus if you want to changes to the DynFlags to take effect you need to call this function again.

load :: GhcMonad m => LoadHowMuch -> m SuccessFlagSource

Try to load the program. See LoadHowMuch for the different modes.

This function implements the core of GHC's --make mode. It preprocesses, compiles and loads the specified modules, avoiding re-compilation wherever possible. Depending on the target (see hscTarget) compilating and loading may result in files being created on disk.

Calls the reportModuleCompilationResult callback after each compiling each module, whether successful or not.

Throw a SourceError if errors are encountered before the actual compilation starts (e.g., during dependency analysis). All other errors are reported using the callback.

loadWithLogger :: GhcMonad m => WarnErrLogger -> LoadHowMuch -> m SuccessFlagSource

Try to load the program. If a Module is supplied, then just attempt to load up to this target. If no Module is supplied, then try to load all targets.

The first argument is a function that is called after compiling each module to print wanrings and errors.

While compiling a module, all SourceErrors are caught and passed to the logger, however, this function may still throw a SourceError if dependency analysis failed (e.g., due to a parse error).

data LoadHowMuch Source
Describes which modules of the module graph need to be loaded.
Constructors
LoadAllTargetsLoad all targets and its dependencies.
LoadUpTo ModuleNameLoad only the given module and its dependencies.
LoadDependenciesOf ModuleNameLoad only the dependencies of the given module, but not the module itself.
data SuccessFlag Source
Constructors
Succeeded
Failed
show/hide Instances
succeeded :: SuccessFlag -> BoolSource
failed :: SuccessFlag -> BoolSource
defaultWarnErrLogger :: WarnErrLoggerSource
type WarnErrLogger = GhcMonad m => Maybe SourceError -> m ()Source
A function called to log warnings and errors.
workingDirectoryChanged :: GhcMonad m => m ()Source

Inform GHC that the working directory has changed. GHC will flush its cache of module locations, since it may no longer be valid.

Note: Before changing the working directory make sure all threads running in the same session have stopped. If you change the working directory, you should also unload the current program (set targets to empty, followed by load).

parseModule :: GhcMonad m => ModSummary -> m ParsedModuleSource

Parse a module.

Throws a SourceError on parse error.

typecheckModule :: GhcMonad m => ParsedModule -> m TypecheckedModuleSource

Typecheck and rename a parsed module.

Throws a SourceError if either fails.

desugarModule :: GhcMonad m => TypecheckedModule -> m DesugaredModuleSource
Desugar a typechecked module.
loadModule :: (TypecheckedMod mod, GhcMonad m) => mod -> m modSource

Load a module. Input doesn't need to be desugared.

A module must be loaded before dependent modules can be typechecked. This always includes generating a ModIface and, depending on the hscTarget, may also include code generation.

This function will always cause recompilation and will always overwrite previous compilation results (potentially files on disk).

data ParsedModule Source
The result of successful parsing.
Constructors
ParsedModule
pm_mod_summary :: ModSummary
pm_parsed_source :: ParsedSource
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data TypecheckedModule Source
The result of successful typechecking. It also contains the parser result.
Constructors
TypecheckedModule
tm_parsed_module :: ParsedModule
tm_renamed_source :: Maybe RenamedSource
tm_typechecked_source :: TypecheckedSource
tm_checked_module_info :: ModuleInfo
tm_internals_ :: (TcGblEnv, ModDetails)
show/hide Instances
data DesugaredModule Source
The result of successful desugaring (i.e., translation to core). Also contains all the information of a typechecked module.
Constructors
DesugaredModule
dm_typechecked_module :: TypecheckedModule
dm_core_module :: ModGuts
show/hide Instances
type TypecheckedSource = LHsBinds IdSource
type ParsedSource = Located (HsModule RdrName)Source
type RenamedSource = (HsGroup Name, [LImportDecl Name], Maybe [LIE Name], Maybe LHsDocString)Source
class ParsedMod m => TypecheckedMod m whereSource
Methods
renamedSource :: m -> Maybe RenamedSourceSource
typecheckedSource :: m -> TypecheckedSourceSource
moduleInfo :: m -> ModuleInfoSource
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class ParsedMod m whereSource
Methods
parsedSource :: m -> ParsedSourceSource
show/hide Instances
coreModule :: DesugaredMod m => m -> ModGutsSource
compileToCoreModule :: GhcMonad m => FilePath -> m CoreModuleSource
This is the way to get access to the Core bindings corresponding to a module. compileToCore parses, typechecks, and desugars the module, then returns the resulting Core module (consisting of the module name, type declarations, and function declarations) if successful.
compileToCoreSimplified :: GhcMonad m => FilePath -> m CoreModuleSource
Like compileToCoreModule, but invokes the simplifier, so as to return simplified and tidied Core.
compileCoreToObj :: GhcMonad m => Bool -> CoreModule -> m ()Source
Takes a CoreModule and compiles the bindings therein to object code. The first argument is a bool flag indicating whether to run the simplifier. The resulting .o, .hi, and executable files, if any, are stored in the current directory, and named according to the module name. This has only so far been tested with a single self-contained module.
getModSummary :: GhcMonad m => ModuleName -> m ModSummarySource

Return the ModSummary of a module with the given name.

The module must be part of the module graph (see hsc_mod_graph and ModuleGraph). If this is not the case, this function will throw a GhcApiError.

This function ignores boot modules and requires that there is only one non-boot module with the given name.

Inspecting the module structure of the program
type ModuleGraph = [ModSummary]Source

A ModuleGraph contains all the nodes from the home package (only). There will be a node for each source module, plus a node for each hi-boot module.

The graph is not necessarily stored in topologically-sorted order. Use GHC.topSortModuleGraph and Digraph.flattenSCC to achieve this.

data ModSummary Source

A single node in a 'ModuleGraph. The nodes of the module graph are one of:

  • A regular Haskell source module
  • A hi-boot source module
  • An external-core source module
Constructors
ModSummary
ms_mod :: ModuleIdentity of the module
ms_hsc_src :: HscSourceThe module source either plain Haskell, hs-boot or external core
ms_location :: ModLocationLocation of the various files belonging to the module
ms_hs_date :: ClockTimeTimestamp of source file
ms_obj_date :: Maybe ClockTimeTimestamp of object, if we have one
ms_srcimps :: [Located (ImportDecl RdrName)]Source imports of the module
ms_imps :: [Located (ImportDecl RdrName)]Non-source imports of the module
ms_hspp_file :: FilePathFilename of preprocessed source file
ms_hspp_opts :: DynFlagsCached flags from OPTIONS, INCLUDE and LANGUAGE pragmas in the modules source code
ms_hspp_buf :: Maybe StringBufferThe actual preprocessed source, if we have it
show/hide Instances
ms_mod_name :: ModSummary -> ModuleNameSource
data ModLocation Source
Where a module lives on the file system: the actual locations of the .hs, .hi and .o files, if we have them
Constructors
ModLocation
ml_hs_file :: Maybe FilePath
ml_hi_file :: FilePath
ml_obj_file :: FilePath
show/hide Instances
getModuleGraph :: GhcMonad m => m ModuleGraphSource
Get the module dependency graph.
isLoaded :: GhcMonad m => ModuleName -> m BoolSource
Return True == module is loaded.
topSortModuleGraphSource
:: BoolDrop hi-boot nodes? (see below)
-> [ModSummary]
-> Maybe ModuleNameRoot module name. If Nothing, use the full graph.
-> [SCC ModSummary]

Calculate SCCs of the module graph, possibly dropping the hi-boot nodes The resulting list of strongly-connected-components is in topologically sorted order, starting with the module(s) at the bottom of the dependency graph (ie compile them first) and ending with the ones at the top.

Drop hi-boot nodes (first boolean arg)?

  • False: treat the hi-boot summaries as nodes of the graph, so the graph must be acyclic
  • True: eliminate the hi-boot nodes, and instead pretend the a source-import of Foo is an import of Foo The resulting graph has no hi-boot nodes, but can be cyclic
Inspecting modules
data ModuleInfo Source
Container for information about a Module.
getModuleInfo :: GhcMonad m => Module -> m (Maybe ModuleInfo)Source
Request information about a loaded Module
modInfoTyThings :: ModuleInfo -> [TyThing]Source
The list of top-level entities defined in a module
modInfoTopLevelScope :: ModuleInfo -> Maybe [Name]Source
modInfoExports :: ModuleInfo -> [Name]Source
modInfoInstances :: ModuleInfo -> [Instance]Source
Returns the instances defined by the specified module. Warning: currently unimplemented for package modules.
modInfoIsExportedName :: ModuleInfo -> Name -> BoolSource
modInfoLookupName :: GhcMonad m => ModuleInfo -> Name -> m (Maybe TyThing)Source
lookupGlobalName :: GhcMonad m => Name -> m (Maybe TyThing)Source
Looks up a global name: that is, any top-level name in any visible module. Unlike lookupName, lookupGlobalName does not use the interactive context, and therefore does not require a preceding setContext.
findGlobalAnns :: (GhcMonad m, Typeable a) => ([Word8] -> a) -> AnnTarget Name -> m [a]Source
mkPrintUnqualifiedForModule :: GhcMonad m => ModuleInfo -> m (Maybe PrintUnqualified)Source
Querying the environment
packageDbModulesSource
:: GhcMonad m
=> BoolOnly consider exposed packages.
-> m [Module]
Return all external modules available in the package database. Modules from the current session (i.e., from the HomePackageTable) are not included.
Printing
type PrintUnqualified = (QueryQualifyName, QueryQualifyModule)Source
alwaysQualify :: PrintUnqualifiedSource
Interactive evaluation
getBindings :: GhcMonad m => m [TyThing]Source
Return the bindings for the current interactive session.
getPrintUnqual :: GhcMonad m => m PrintUnqualifiedSource
findModule :: GhcMonad m => ModuleName -> Maybe FastString -> m ModuleSource
Takes a ModuleName and possibly a PackageId, and consults the filesystem and package database to find the corresponding Module, using the algorithm that is used for an import declaration.
lookupModule :: GhcMonad m => ModuleName -> Maybe FastString -> m ModuleSource
Like findModule, but differs slightly when the module refers to a source file, and the file has not been loaded via load. In this case, findModule will throw an error (module not loaded), but lookupModule will check to see whether the module can also be found in a package, and if so, that package Module will be returned. If not, the usual module-not-found error will be thrown.
setContextSource
:: GhcMonad m
=> [Module]entire top level scope of these modules
-> [Module]exports only of these modules
-> m ()

Set the interactive evaluation context.

Setting the context doesn't throw away any bindings; the bindings we've built up in the InteractiveContext simply move to the new module. They always shadow anything in scope in the current context.

getContext :: GhcMonad m => m ([Module], [Module])Source
Get the interactive evaluation context, consisting of a pair of the set of modules from which we take the full top-level scope, and the set of modules from which we take just the exports respectively.
getNamesInScope :: GhcMonad m => m [Name]Source
Returns all names in scope in the current interactive context
getRdrNamesInScope :: GhcMonad m => m [RdrName]Source
getGRE :: GhcMonad m => m GlobalRdrEnvSource
get the GlobalRdrEnv for a session
moduleIsInterpreted :: GhcMonad m => Module -> m BoolSource
Returns True if the specified module is interpreted, and hence has its full top-level scope available.
getInfo :: GhcMonad m => Name -> m (Maybe (TyThing, Fixity, [Instance]))Source
Looks up an identifier in the current interactive context (for :info) Filter the instances by the ones whose tycons (or clases resp) are in scope (qualified or otherwise). Otherwise we list a whole lot too many! The exact choice of which ones to show, and which to hide, is a judgement call. (see Trac #1581)
exprType :: GhcMonad m => String -> m TypeSource
Get the type of an expression
typeKind :: GhcMonad m => String -> m KindSource
Get the kind of a type
parseName :: GhcMonad m => String -> m [Name]Source
Parses a string as an identifier, and returns the list of Names that the identifier can refer to in the current interactive context.
data RunResult Source
Constructors
RunOk [Name]names bound by this evaluation
RunFailedstatement failed compilation
RunException SomeExceptionstatement raised an exception
RunBreak ThreadId [Name] (Maybe BreakInfo)
runStmt :: GhcMonad m => String -> SingleStep -> m RunResultSource
Run a statement in the current interactive context. Statement may bind multple values.
data SingleStep Source
Constructors
RunToCompletion
SingleStep
RunAndLogSteps
resume :: GhcMonad m => (SrcSpan -> Bool) -> SingleStep -> m RunResultSource
data Resume Source
data History Source
getHistorySpan :: GhcMonad m => History -> m SrcSpanSource
getHistoryModule :: History -> ModuleSource
getResumeContext :: GhcMonad m => m [Resume]Source
abandon :: GhcMonad m => m BoolSource
abandonAll :: GhcMonad m => m BoolSource
back :: GhcMonad m => m ([Name], Int, SrcSpan)Source
forward :: GhcMonad m => m ([Name], Int, SrcSpan)Source
showModule :: GhcMonad m => ModSummary -> m StringSource
isModuleInterpreted :: GhcMonad m => ModSummary -> m BoolSource
compileExpr :: GhcMonad m => String -> m HValueSource
data HValue Source
dynCompileExpr :: GhcMonad m => String -> m DynamicSource
lookupName :: GhcMonad m => Name -> m (Maybe TyThing)Source
Returns the TyThing for a Name. The Name may refer to any entity known to GHC, including Names defined using runStmt.
obtainTermFromId :: GhcMonad m => Int -> Bool -> Id -> m TermSource
obtainTermFromVal :: GhcMonad m => Int -> Bool -> Type -> a -> m TermSource
reconstructType :: HscEnv -> Int -> Id -> IO (Maybe Type)Source
modInfoModBreaks :: ModuleInfo -> ModBreaksSource
data ModBreaks Source
All the information about the breakpoints for a given module
Constructors
ModBreaks
modBreaks_flags :: BreakArrayThe array of flags, one per breakpoint, indicating which breakpoints are enabled.
modBreaks_locs :: !(Array BreakIndex SrcSpan)An array giving the source span of each breakpoint.
modBreaks_vars :: !(Array BreakIndex [OccName])An array giving the names of the free variables at each breakpoint.
type BreakIndex = IntSource
Breakpoint index
data BreakInfo Source
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data BreakArray Source
setBreakOn :: BreakArray -> Int -> IO BoolSource
setBreakOff :: BreakArray -> Int -> IO BoolSource
getBreak :: BreakArray -> Int -> IO (Maybe Word)Source
Abstract syntax elements
Packages
data PackageId Source
Essentially just a string identifying a package, including the version: e.g. parsec-1.0
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Modules
data Module Source
A Module is a pair of a PackageId and a ModuleName.
show/hide Instances
mkModule :: PackageId -> ModuleName -> ModuleSource
pprModule :: Module -> SDocSource
moduleName :: Module -> ModuleNameSource
modulePackageId :: Module -> PackageIdSource
data ModuleName Source
A ModuleName is essentially a simple string, e.g. Data.List.
show/hide Instances
mkModuleName :: String -> ModuleNameSource
moduleNameString :: ModuleName -> StringSource
Names
data Name Source
A unique, unambigious name for something, containing information about where that thing originated.
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isExternalName :: Name -> BoolSource
nameModule :: Name -> ModuleSource
pprParenSymName :: NamedThing a => a -> SDocSource
print a NamedThing, adding parentheses if the name is an operator.
nameSrcSpan :: Name -> SrcSpanSource
class NamedThing a whereSource
A class allowing convenient access to the Name of various datatypes
Methods
getOccName :: a -> OccNameSource
getName :: a -> NameSource
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data RdrName Source
Do not use the data constructors of RdrName directly: prefer the family of functions that creates them, such as mkRdrUnqual
Constructors
Unqual OccNameUsed for ordinary, unqualified occurrences, e.g. x, y or Foo. Create such a RdrName with mkRdrUnqual
Qual ModuleName OccNameA qualified name written by the user in source code. The module isn't necessarily the module where the thing is defined; just the one from which it is imported. Examples are Bar.x, Bar.y or Bar.Foo. Create such a RdrName with mkRdrQual
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Identifiers
type Id = VarSource
idType :: Id -> KindSource
isImplicitId :: Id -> BoolSource
isImplicitId tells whether an Ids info is implied by other declarations, so we don't need to put its signature in an interface file, even if it's mentioned in some other interface unfolding.
isDeadBinder :: Id -> BoolSource
isExportedId :: Var -> BoolSource
isExportedIdVar means "don't throw this away"
isLocalId :: Var -> BoolSource
isGlobalId :: Var -> BoolSource
isRecordSelector :: Id -> BoolSource
isPrimOpId :: Id -> BoolSource
isFCallId :: Id -> BoolSource
isClassOpId_maybe :: Id -> Maybe ClassSource
isDataConWorkId :: Id -> BoolSource
idDataCon :: Id -> DataConSource

Get from either the worker or the wrapper Id to the DataCon. Currently used only in the desugarer.

INVARIANT: idDataCon (dataConWrapId d) = d: remember, dataConWrapId can return either the wrapper or the worker

isBottomingId :: Id -> BoolSource
Returns true if an application to n args would diverge
isDictonaryId :: Id -> BoolSource
recordSelectorFieldLabel :: Id -> (TyCon, FieldLabel)Source
If the Id is that for a record selector, extract the sel_tycon and label. Panic otherwise
Type constructors
data TyCon Source

Represents type constructors. Type constructors are introduced by things such as:

1) Data declarations: data Foo = ... creates the Foo type constructor of kind *

2) Type synonyms: type Foo = ... creates the Foo type constructor

3) Newtypes: newtype Foo a = MkFoo ... creates the Foo type constructor of kind * -> *

4) Class declarations: class Foo where creates the Foo type constructor of kind *

5) Type coercions! This is because we represent a coercion from t1 to t2 as a Type, where that type has kind t1 ~ t2. See Coercion for more on this

This data type also encodes a number of primitive, built in type constructors such as those for function and tuple types.

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tyConTyVars :: TyCon -> [TyVar]Source
tyConDataCons :: TyCon -> [DataCon]Source
As tyConDataCons_maybe, but returns the empty list of constructors if no constructors could be found
tyConArity :: TyCon -> AritySource
isClassTyCon :: TyCon -> BoolSource
Is this TyCon that for a class instance?
isSynTyCon :: TyCon -> BoolSource

A product TyCon must both:

1. Have one constructor

2. Not be existential

However other than this there are few restrictions: they may be data or newtype TyCons of any boxity and may even be recursive.

Is this a TyCon representing a type synonym (type)?

isNewTyCon :: TyCon -> BoolSource
Is this TyCon that for a newtype
isPrimTyCon :: TyCon -> BoolSource
Does this TyCon represent something that cannot be defined in Haskell?
isFunTyCon :: TyCon -> BoolSource
isOpenTyCon :: TyCon -> BoolSource
Is this a TyCon, synonym or otherwise, that may have further instances appear?
synTyConDefn :: TyCon -> ([TyVar], Type)Source
Extract the TyVars bound by a type synonym and the corresponding (unsubstituted) right hand side. If the given TyCon is not a type synonym, panics
synTyConType :: TyCon -> TypeSource
Find the expansion of the type synonym represented by the given TyCon. The free variables of this type will typically include those TyVars bound by the TyCon. Panics if the TyCon is not that of a type synonym
synTyConResKind :: TyCon -> KindSource
Find the Kind of an open type synonym. Panics if the TyCon is not an open type synonym
Type variables
type TyVar = VarSource
alphaTyVars :: [TyVar]Source
Data constructors
data DataCon Source
A data constructor
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dataConSig :: DataCon -> ([TyVar], ThetaType, [Type], Type)Source

The "signature" of the DataCon returns, in order:

1) The result of dataConAllTyVars,

2) All the ThetaTypes relating to the DataCon (coercion, dictionary, implicit parameter - whatever)

3) The type arguments to the constructor

4) The original result type of the DataCon

dataConType :: DataCon -> TypeSource
dataConTyCon :: DataCon -> TyConSource
The type constructor that we are building via this data constructor
dataConFieldLabels :: DataCon -> [FieldLabel]Source
The labels for the fields of this particular DataCon
dataConIsInfix :: DataCon -> BoolSource
Should the DataCon be presented infix?
isVanillaDataCon :: DataCon -> BoolSource
Vanilla DataCons are those that are nice boring Haskell 98 constructors
dataConStrictMarks :: DataCon -> [StrictnessMark]Source
The strictness markings decided on by the compiler. Does not include those for existential dictionaries. The list is in one-to-one correspondence with the arity of the DataCon
data StrictnessMark Source
Constructors
MarkedStrict
MarkedUnboxed
NotMarkedStrict
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isMarkedStrict :: StrictnessMark -> BoolSource
Classes
data Class Source
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classMethods :: Class -> [Id]Source
classSCTheta :: Class -> [PredType]Source
classTvsFds :: Class -> ([TyVar], [FunDep TyVar])Source
pprFundeps :: Outputable a => [FunDep a] -> SDocSource
Instances
data Instance Source
show/hide Instances
instanceDFunId :: Instance -> DFunIdSource
pprInstance :: Instance -> SDocSource
pprInstanceHdr :: Instance -> SDocSource
Types and Kinds
data Type Source
The key representation of types within the compiler
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splitForAllTys :: Type -> ([TyVar], Type)Source
Attempts to take a forall type apart, returning all the immediate such bound type variables and the remainder of the type. Always suceeds, even if that means returning an empty list of TyVars
funResultTy :: Type -> TypeSource
Extract the function result type and panic if that is not possible
pprParendType :: Type -> SDocSource
pprTypeApp :: NamedThing a => a -> [Type] -> SDocSource
type Kind = TypeSource

The key type representing kinds in the compiler. Invariant: a kind is always in one of these forms:

 FunTy k1 k2
 TyConApp PrimTyCon [...]
 TyVar kv   -- (during inference only)
 ForAll ... -- (for top-level coercions)
data PredType Source

A type of the form PredTy p represents a value whose type is the Haskell predicate p, where a predicate is what occurs before the => in a Haskell type. It can be expanded into its representation, but:

  • The type checker must treat it as opaque
  • The rest of the compiler treats it as transparent

Consider these examples:

 f :: (Eq a) => a -> Int
 g :: (?x :: Int -> Int) => a -> Int
 h :: (r\l) => {r} => {l::Int | r}

Here the Eq a and ?x :: Int -> Int and rl are all called "predicates"

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type ThetaType = [PredType]Source
A collection of PredTypes
pprThetaArrow :: ThetaType -> SDocSource
Entities
data TyThing Source
A typecheckable-thing, essentially anything that has a name
Constructors
AnId Id
ADataCon DataCon
ATyCon TyCon
AClass Class
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Syntax
module HsSyn
Fixities
data FixityDirection Source
Constructors
InfixL
InfixR
InfixN
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defaultFixity :: FixitySource
maxPrecedence :: IntSource
negateFixity :: FixitySource
compareFixity :: Fixity -> Fixity -> (Bool, Bool)Source
Source locations
data SrcLoc Source
Represents a single point within a file
show/hide Instances
pprDefnLoc :: SrcSpan -> SDocSource
Pretty prints information about the SrcSpan in the style defined at ...
mkSrcLoc :: FastString -> Int -> Int -> SrcLocSource
isGoodSrcLoc :: SrcLoc -> BoolSource
Good SrcLocs have precise information about their location
noSrcLoc :: SrcLocSource
srcLocFile :: SrcLoc -> FastStringSource
Gives the filename of the SrcLoc if it is available, otherwise returns a dummy value
srcLocLine :: SrcLoc -> IntSource
Raises an error when used on a bad SrcLoc
srcLocCol :: SrcLoc -> IntSource
Raises an error when used on a bad SrcLoc
data SrcSpan Source

A SrcSpan delimits a portion of a text file. It could be represented by a pair of (line,column) coordinates, but in fact we optimise slightly by using more compact representations for single-line and zero-length spans, both of which are quite common.

The end position is defined to be the column after the end of the span. That is, a span of (1,1)-(1,2) is one character long, and a span of (1,1)-(1,1) is zero characters long.

show/hide Instances
mkSrcSpan :: SrcLoc -> SrcLoc -> SrcSpanSource
Create a SrcSpan between two points in a file
srcLocSpan :: SrcLoc -> SrcSpanSource
Create a SrcSpan corresponding to a single point
isGoodSrcSpan :: SrcSpan -> BoolSource
Test if a SrcSpan is good, i.e. has precise location information
noSrcSpan :: SrcSpanSource
srcSpanStart :: SrcSpan -> SrcLocSource
Returns the location at the start of the SrcSpan or a bad SrcSpan if that is unavailable
srcSpanEnd :: SrcSpan -> SrcLocSource
Returns the location at the end of the SrcSpan or a bad SrcSpan if that is unavailable
srcSpanFile :: SrcSpan -> FastStringSource
srcSpanStartLine :: SrcSpan -> IntSource
Raises an error when used on a bad SrcSpan
srcSpanEndLine :: SrcSpan -> IntSource
Raises an error when used on a bad SrcSpan
srcSpanStartCol :: SrcSpan -> IntSource
Raises an error when used on a bad SrcSpan
srcSpanEndCol :: SrcSpan -> IntSource
Raises an error when used on a bad SrcSpan
Located
data Located e Source
We attach SrcSpans to lots of things, so let's have a datatype for it.
Constructors
L SrcSpan e
show/hide Instances
Constructing Located
noLoc :: e -> Located eSource
mkGeneralLocated :: String -> e -> Located eSource
Deconstructing Located
getLoc :: Located e -> SrcSpanSource
unLoc :: Located e -> eSource
Combining and comparing Located values
eqLocated :: Eq a => Located a -> Located a -> BoolSource
Tests whether the two located things are equal
cmpLocated :: Ord a => Located a -> Located a -> OrderingSource
Tests the ordering of the two located things
combineLocs :: Located a -> Located b -> SrcSpanSource
addCLoc :: Located a -> Located b -> c -> Located cSource
Combine locations from two Located things and add them to a third thing
leftmost_smallest :: SrcSpan -> SrcSpan -> OrderingSource
leftmost_largest :: SrcSpan -> SrcSpan -> OrderingSource
Alternative strategies for ordering SrcSpans
rightmost :: SrcSpan -> SrcSpan -> OrderingSource
spans :: SrcSpan -> (Int, Int) -> BoolSource
Determines whether a span encloses a given line and column index
isSubspanOfSource
:: SrcSpanThe span that may be enclosed by the other
-> SrcSpanThe span it may be enclosed by
-> Bool
Determines whether a span is enclosed by another one
Exceptions
data GhcException Source
Constructors
PhaseFailed String ExitCode
Interrupted
Signal Int
UsageError String
CmdLineError String
Panic String
InstallationError String
ProgramError String
show/hide Instances
showGhcException :: GhcException -> String -> StringSource
Token stream manipulations
data Token Source
getTokenStream :: GhcMonad m => Module -> m [Located Token]Source

Return module source as token stream, including comments.

The module must be in the module graph and its source must be available. Throws a SourceError on parse error.

getRichTokenStream :: GhcMonad m => Module -> m [(Located Token, String)]Source
Give even more information on the source than getTokenStream This function allows reconstructing the source completely with showRichTokenStream.
showRichTokenStream :: [(Located Token, String)] -> StringSource
Take a rich token stream such as produced from getRichTokenStream and return source code almost identical to the original code (except for insignificant whitespace.)
addSourceToTokens :: SrcLoc -> StringBuffer -> [Located Token] -> [(Located Token, String)]Source
Given a source location and a StringBuffer corresponding to this location, return a rich token stream with the source associated to the tokens.
Miscellaneous
cyclicModuleErr :: [ModSummary] -> SDocSource
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