-- * Flags and settings
DynFlags(..), DynFlag(..), GhcMode(..), HscTarget(..), dopt,
parseDynamicFlags,
+ initPackages,
getSessionDynFlags,
setSessionDynFlags,
setMsgHandler,
-- * Targets
- Target(..),
+ Target(..), TargetId(..), Phase,
setTargets,
getTargets,
addTarget,
+ removeTarget,
guessTarget,
- -- * Loading/compiling the program
+ -- * Loading\/compiling the program
depanal,
- load, SuccessFlag(..), -- also does depanal
+ load, LoadHowMuch(..), SuccessFlag(..), -- also does depanal
+ loadMsgs,
workingDirectoryChanged,
+ checkModule, CheckedModule(..),
+ TypecheckedSource, ParsedSource, RenamedSource,
-- * Inspecting the module structure of the program
ModuleGraph, ModSummary(..),
isLoaded,
topSortModuleGraph,
+ -- * Inspecting modules
+ ModuleInfo,
+ getModuleInfo,
+ modInfoTyThings,
+ modInfoTopLevelScope,
+ modInfoPrintUnqualified,
+ modInfoExports,
+ modInfoInstances,
+ modInfoIsExportedName,
+ modInfoLookupName,
+ lookupGlobalName,
+
+ -- * Printing
+ PrintUnqualified, alwaysQualify,
+
-- * Interactive evaluation
getBindings, getPrintUnqual,
#ifdef GHCI
setContext, getContext,
+ getNamesInScope,
moduleIsInterpreted,
- getInfo, GetInfoResult,
+ getInfo,
exprType,
typeKind,
- lookupName,
+ parseName,
RunResult(..),
runStmt,
- browseModule,
showModule,
compileExpr, HValue,
+ lookupName,
#endif
-- * Abstract syntax elements
+
+ -- ** Modules
Module, mkModule, pprModule,
- Type, dropForAlls,
+
+ -- ** Names
+ Name,
+ nameModule, nameParent_maybe, pprParenSymName, nameSrcLoc,
+ NamedThing(..),
+
+ -- ** Identifiers
+ Id, idType,
+ isImplicitId, isDeadBinder,
+ isSpecPragmaId, isExportedId, isLocalId, isGlobalId,
+ isRecordSelector,
+ isPrimOpId, isFCallId, isClassOpId_maybe,
+ isDataConWorkId, idDataCon,
+ isBottomingId, isDictonaryId,
+ recordSelectorFieldLabel,
+
+ -- ** Type constructors
+ TyCon,
+ tyConTyVars, tyConDataCons,
+ isClassTyCon, isSynTyCon, isNewTyCon,
+ getSynTyConDefn,
+
+ -- ** Data constructors
+ DataCon,
+ dataConSig, dataConType, dataConTyCon, dataConFieldLabels,
+ dataConIsInfix, isVanillaDataCon,
+ dataConStrictMarks,
+ StrictnessMark(..), isMarkedStrict,
+
+ -- ** Classes
+ Class,
+ classMethods, classSCTheta, classTvsFds,
+ pprFundeps,
+
+ -- ** Instances
+ Instance,
+ instanceDFunId, pprInstance,
+
+ -- ** Types and Kinds
+ Type, dropForAlls, splitForAllTys, funResultTy, pprParendType,
Kind,
- Name, Id, TyCon, Class, DataCon,
+ PredType,
+ ThetaType, pprThetaArrow,
+
+ -- ** Entities
TyThing(..),
- idType,
- -- used by DriverMkDepend:
+ -- ** Syntax
+ module HsSyn, -- ToDo: remove extraneous bits
+
+ -- ** Fixities
+ FixityDirection(..),
+ defaultFixity, maxPrecedence,
+ negateFixity,
+ compareFixity,
+
+ -- ** Source locations
+ SrcLoc, pprDefnLoc,
+
+ -- * Exceptions
+ GhcException(..), showGhcException,
+
+ -- * Miscellaneous
sessionHscEnv,
cyclicModuleErr,
) where
{-
ToDo:
- * return error messages rather than printing them.
- * inline bits of HscMain here to simplify layering: hscGetInfo,
- hscTcExpr, hscStmt.
- * implement second argument to load.
+ * inline bits of HscMain here to simplify layering: hscTcExpr, hscStmt.
* we need to expose DynFlags, so should parseDynamicFlags really be
part of this interface?
* what StaticFlags should we expose, if any?
#ifdef GHCI
import qualified Linker
import Linker ( HValue, extendLinkEnv )
-import NameEnv ( lookupNameEnv )
-import TcRnDriver ( mkExportEnv, getModuleContents )
-import RdrName ( GlobalRdrEnv, plusGlobalRdrEnv )
-import HscMain ( hscGetInfo, GetInfoResult,
- hscStmt, hscTcExpr, hscKcType )
+import TcRnDriver ( tcRnLookupRdrName, tcRnGetInfo,
+ tcRnLookupName, getModuleExports )
+import RdrName ( plusGlobalRdrEnv, Provenance(..),
+ ImportSpec(..), ImpDeclSpec(..), ImpItemSpec(..),
+ emptyGlobalRdrEnv, mkGlobalRdrEnv )
+import HscMain ( hscParseIdentifier, hscStmt, hscTcExpr, hscKcType )
import Type ( tidyType )
import VarEnv ( emptyTidyEnv )
import GHC.Exts ( unsafeCoerce# )
-import IfaceSyn ( IfaceDecl )
#endif
-import Type ( Kind, Type, dropForAlls )
-import Id ( Id, idType )
-import TyCon ( TyCon )
-import Class ( Class )
-import DataCon ( DataCon )
-import Name ( Name )
+import Packages ( initPackages, isHomeModule )
+import NameSet ( NameSet, nameSetToList, elemNameSet )
+import RdrName ( GlobalRdrEnv, GlobalRdrElt(..), RdrName,
+ globalRdrEnvElts )
+import HsSyn
+import Type ( Kind, Type, dropForAlls, PredType, ThetaType,
+ pprThetaArrow, pprParendType, splitForAllTys,
+ funResultTy )
+import Id ( Id, idType, isImplicitId, isDeadBinder,
+ isSpecPragmaId, isExportedId, isLocalId, isGlobalId,
+ isRecordSelector, recordSelectorFieldLabel,
+ isPrimOpId, isFCallId, isClassOpId_maybe,
+ isDataConWorkId, idDataCon,
+ isBottomingId )
+import TyCon ( TyCon, isClassTyCon, isSynTyCon, isNewTyCon,
+ tyConTyVars, tyConDataCons, getSynTyConDefn )
+import Class ( Class, classSCTheta, classTvsFds, classMethods )
+import FunDeps ( pprFundeps )
+import DataCon ( DataCon, dataConWrapId, dataConSig, dataConTyCon,
+ dataConFieldLabels, dataConStrictMarks,
+ dataConIsInfix, isVanillaDataCon )
+import Name ( Name, nameModule, NamedThing(..), nameParent_maybe,
+ nameSrcLoc )
+import OccName ( parenSymOcc )
import NameEnv ( nameEnvElts )
+import InstEnv ( Instance, instanceDFunId, pprInstance )
+import SrcLoc
import DriverPipeline
import DriverPhases ( Phase(..), isHaskellSrcFilename, startPhase )
import GetImports ( getImports )
import Packages ( isHomePackage )
import Finder
-import HscMain ( newHscEnv )
+import HscMain ( newHscEnv, hscFileCheck, HscResult(..) )
import HscTypes
import DynFlags
import StaticFlags
import FiniteMap
import Panic
import Digraph
-import ErrUtils ( showPass )
+import Bag ( unitBag, emptyBag )
+import ErrUtils ( showPass, Messages, putMsg, debugTraceMsg,
+ mkPlainErrMsg, pprBagOfErrors )
import qualified ErrUtils
import Util
-import StringBuffer ( StringBuffer(..), hGetStringBuffer, lexemeToString )
+import StringBuffer ( StringBuffer, hGetStringBuffer )
import Outputable
import SysTools ( cleanTempFilesExcept )
-import BasicTypes ( SuccessFlag(..), succeeded )
-import Maybes ( orElse, expectJust, mapCatMaybes )
+import BasicTypes
+import TcType ( tcSplitSigmaTy, isDictTy )
+import FastString ( mkFastString )
import Directory ( getModificationTime, doesFileExist )
import Maybe ( isJust, isNothing, fromJust )
-import Maybes ( expectJust )
+import Maybes ( orElse, expectJust, mapCatMaybes )
import List ( partition, nub )
-import Monad ( unless, when, foldM )
+import qualified List
+import Monad ( unless, when )
import System ( exitWith, ExitCode(..) )
import Time ( ClockTime )
import EXCEPTION as Exception hiding (handle)
-import GLAEXTS ( Int(..) )
import DATA_IOREF
import IO
import Prelude hiding (init)
hFlush stdout
case exception of
-- an IO exception probably isn't our fault, so don't panic
- IOException _ -> hPutStrLn stderr (show exception)
+ IOException _ -> putMsg (show exception)
AsyncException StackOverflow ->
- hPutStrLn stderr "stack overflow: use +RTS -K<size> to increase it"
- _other -> hPutStr stderr (show (Panic (show exception)))
+ putMsg "stack overflow: use +RTS -K<size> to increase it"
+ _other -> putMsg (show (Panic (show exception)))
exitWith (ExitFailure 1)
) $
- -- all error messages are propagated as exceptions
+ -- program errors: messages with locations attached. Sometimes it is
+ -- convenient to just throw these as exceptions.
+ handleDyn (\dyn -> do printErrs (pprBagOfErrors (unitBag dyn))
+ exitWith (ExitFailure 1)) $
+
+ -- error messages propagated as exceptions
handleDyn (\dyn -> do
hFlush stdout
case dyn of
PhaseFailed _ code -> exitWith code
Interrupted -> exitWith (ExitFailure 1)
- _ -> do hPutStrLn stderr (show (dyn :: GhcException))
+ _ -> do putMsg (show (dyn :: GhcException))
exitWith (ExitFailure 1)
) $
inner
-- | Starts a new session. A session consists of a set of loaded
-- modules, a set of options (DynFlags), and an interactive context.
--- ToDo: GhcMode should say "keep typechecked code" and/or "keep renamed
+-- ToDo: GhcMode should say "keep typechecked code" and\/or "keep renamed
-- code".
newSession :: GhcMode -> IO Session
newSession mode = do
-- | 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
+-- the program\/library. Unloading the current program is achieved by
-- setting the current set of targets to be empty, followed by load.
setTargets :: Session -> [Target] -> IO ()
setTargets s targets = modifySession s (\h -> h{ hsc_targets = targets })
getTargets :: Session -> IO [Target]
getTargets s = withSession s (return . hsc_targets)
--- Add another target, or update an existing target with new content.
+-- | Add another target
addTarget :: Session -> Target -> IO ()
addTarget s target
= modifySession s (\h -> h{ hsc_targets = target : hsc_targets h })
--- Remove a target
--- removeTarget :: Session -> Module -> IO ()
+-- | Remove a target
+removeTarget :: Session -> TargetId -> IO ()
+removeTarget s target_id
+ = modifySession s (\h -> h{ hsc_targets = filter (hsc_targets h) })
+ where
+ filter targets = [ t | t@(Target id _) <- targets, id /= target_id ]
-- Attempts to guess what Target a string refers to. This function implements
-- the --make/GHCi command-line syntax for filenames:
-- then use that
-- - otherwise interpret the string as a module name
--
-guessTarget :: String -> IO Target
-guessTarget file
+guessTarget :: String -> Maybe Phase -> IO Target
+guessTarget file (Just phase)
+ = return (Target (TargetFile file (Just phase)) Nothing)
+guessTarget file Nothing
| isHaskellSrcFilename file
- = return (Target (TargetFile file) Nothing)
+ = return (Target (TargetFile file Nothing) Nothing)
| otherwise
= do exists <- doesFileExist hs_file
- if exists then return (Target (TargetFile hs_file) Nothing) else do
+ if exists
+ then return (Target (TargetFile hs_file Nothing) Nothing)
+ else do
exists <- doesFileExist lhs_file
- if exists then return (Target (TargetFile lhs_file) Nothing) else do
+ if exists
+ then return (Target (TargetFile lhs_file Nothing) Nothing)
+ else do
return (Target (TargetModule (mkModule file)) Nothing)
where
- hs_file = file ++ ".hs"
- lhs_file = file ++ ".lhs"
+ hs_file = file `joinFileExt` "hs"
+ lhs_file = file `joinFileExt` "lhs"
-- -----------------------------------------------------------------------------
-- Loading the program
--- | The result of load.
-data LoadResult
- = LoadOk Errors -- ^ all specified targets were loaded successfully.
- | LoadFailed Errors -- ^ not all modules were loaded.
-
-type Errors = [String]
-
-{-
-data ErrMsg = ErrMsg {
- errMsgSeverity :: Severity, -- warning, error, etc.
- errMsgSpans :: [SrcSpan],
- errMsgShortDoc :: Doc,
- errMsgExtraInfo :: Doc
- }
--}
-
-- Perform a dependency analysis starting from the current targets
-- and update the session with the new module graph.
-depanal :: Session -> [Module] -> IO ()
+depanal :: Session -> [Module] -> IO (Either Messages ModuleGraph)
depanal (Session ref) excluded_mods = do
hsc_env <- readIORef ref
let
old_graph = hsc_mod_graph hsc_env
showPass dflags "Chasing dependencies"
- when (verbosity dflags >= 1 && gmode == BatchCompile) $
- hPutStrLn stderr (showSDoc (hcat [
+ when (gmode == BatchCompile) $
+ debugTraceMsg dflags 1 (showSDoc (hcat [
text "Chasing modules from: ",
hcat (punctuate comma (map pprTarget targets))]))
- graph <- downsweep hsc_env old_graph excluded_mods
- writeIORef ref hsc_env{ hsc_mod_graph=graph }
+ r <- downsweep hsc_env old_graph excluded_mods
+ case r of
+ Right mod_graph -> writeIORef ref hsc_env{ hsc_mod_graph = mod_graph }
+ _ -> return ()
+ return r
+
+{-
+-- | The result of load.
+data LoadResult
+ = LoadOk Errors -- ^ all specified targets were loaded successfully.
+ | LoadFailed Errors -- ^ not all modules were loaded.
+
+type Errors = [String]
+
+data ErrMsg = ErrMsg {
+ errMsgSeverity :: Severity, -- warning, error, etc.
+ errMsgSpans :: [SrcSpan],
+ errMsgShortDoc :: Doc,
+ errMsgExtraInfo :: Doc
+ }
+-}
+data LoadHowMuch
+ = LoadAllTargets
+ | LoadUpTo Module
+ | LoadDependenciesOf Module
-- | 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.
-load :: Session -> Maybe Module -> IO SuccessFlag
-load s@(Session ref) maybe_mod
+load :: Session -> LoadHowMuch -> IO SuccessFlag
+load session how_much =
+ loadMsgs session how_much ErrUtils.printErrorsAndWarnings
+
+-- | Version of 'load' that takes a callback function to be invoked
+-- on compiler errors and warnings as they occur during compilation.
+loadMsgs :: Session -> LoadHowMuch -> (Messages-> IO ()) -> IO SuccessFlag
+loadMsgs s@(Session ref) how_much msg_act
= do
-- Dependency analysis first. Note that this fixes the module graph:
-- even if we don't get a fully successful upsweep, the full module
-- graph is still retained in the Session. We can tell which modules
-- were successfully loaded by inspecting the Session's HPT.
- depanal s []
+ mb_graph <- depanal s []
+ case mb_graph of
+ Left msgs -> do msg_act msgs; return Failed
+ Right mod_graph -> loadMsgs2 s how_much msg_act mod_graph
+loadMsgs2 s@(Session ref) how_much msg_act mod_graph = do
hsc_env <- readIORef ref
let hpt1 = hsc_HPT hsc_env
let dflags = hsc_dflags hsc_env
- let mod_graph = hsc_mod_graph hsc_env
-
- let ghci_mode = ghcMode (hsc_dflags hsc_env) -- this never changes
- let verb = verbosity dflags
+ let ghci_mode = ghcMode dflags -- this never changes
-- The "bad" boot modules are the ones for which we have
-- B.hs-boot in the module graph, but no B.hs
-- The downsweep should have ensured this does not happen
-- (see msDeps)
let all_home_mods = [ms_mod s | s <- mod_graph, not (isBootSummary s)]
+#ifdef DEBUG
bad_boot_mods = [s | s <- mod_graph, isBootSummary s,
not (ms_mod s `elem` all_home_mods)]
+#endif
ASSERT( null bad_boot_mods ) return ()
-- mg2_with_srcimps drops the hi-boot nodes, returning a
evaluate pruned_hpt
- when (verb >= 2) $
- putStrLn (showSDoc (text "Stable obj:" <+> ppr stable_obj $$
+ debugTraceMsg dflags 2 (showSDoc (text "Stable obj:" <+> ppr stable_obj $$
text "Stable BCO:" <+> ppr stable_bco))
-- Unload any modules which are going to be re-linked this time around.
-- This graph should be cycle-free.
-- If we're restricting the upsweep to a portion of the graph, we
-- also want to retain everything that is still stable.
- let full_mg, partial_mg :: [SCC ModSummary]
+ let full_mg :: [SCC ModSummary]
full_mg = topSortModuleGraph False mod_graph Nothing
- partial_mg = topSortModuleGraph False mod_graph maybe_mod
+ maybe_top_mod = case how_much of
+ LoadUpTo m -> Just m
+ LoadDependenciesOf m -> Just m
+ _ -> Nothing
+
+ partial_mg0 :: [SCC ModSummary]
+ partial_mg0 = topSortModuleGraph False mod_graph maybe_top_mod
+
+ -- LoadDependenciesOf m: we want the upsweep to stop just
+ -- short of the specified module (unless the specified module
+ -- is stable).
+ partial_mg
+ | LoadDependenciesOf mod <- how_much
+ = ASSERT( case last partial_mg0 of
+ AcyclicSCC ms -> ms_mod ms == mod; _ -> False )
+ List.init partial_mg0
+ | otherwise
+ = partial_mg0
+
stable_mg =
[ AcyclicSCC ms
| AcyclicSCC ms <- full_mg,
(upsweep_ok, hsc_env1, modsUpswept)
<- upsweep (hsc_env { hsc_HPT = emptyHomePackageTable })
- pruned_hpt stable_mods cleanup mg
+ pruned_hpt stable_mods cleanup msg_act mg
-- Make modsDone be the summaries for each home module now
-- available; this should equal the domain of hpt3.
then
-- Easy; just relink it all.
- do when (verb >= 2) $
- hPutStrLn stderr "Upsweep completely successful."
+ do debugTraceMsg dflags 2 "Upsweep completely successful."
-- Clean up after ourselves
cleanTempFilesExcept dflags (ppFilesFromSummaries modsDone)
mod_graph
do_linking = a_root_is_Main || no_hs_main
- when (ghci_mode == BatchCompile && isJust ofile && not do_linking
- && verb > 0) $
- hPutStrLn stderr ("Warning: output was redirected with -o, " ++
+ when (ghci_mode == BatchCompile && isJust ofile && not do_linking) $
+ debugTraceMsg dflags 1 ("Warning: output was redirected with -o, " ++
"but no output will be generated\n" ++
"because there is no " ++ main_mod ++ " module.")
-- Tricky. We need to back out the effects of compiling any
-- half-done cycles, both so as to clean up the top level envs
-- and to avoid telling the interactive linker to link them.
- do when (verb >= 2) $
- hPutStrLn stderr "Upsweep partially successful."
+ do debugTraceMsg dflags 2 "Upsweep partially successful."
let modsDone_names
= map ms_mod modsDone
-- source file, but that doesn't do any harm.
ppFilesFromSummaries summaries = [ fn | Just fn <- map ms_hspp_file summaries ]
------------------------------------------------------------------------------
+-- -----------------------------------------------------------------------------
+-- Check module
+
+data CheckedModule =
+ CheckedModule { parsedSource :: ParsedSource,
+ renamedSource :: Maybe RenamedSource,
+ typecheckedSource :: Maybe TypecheckedSource,
+ checkedModuleInfo :: Maybe ModuleInfo
+ }
+ -- ToDo: improvements that could be made here:
+ -- if the module succeeded renaming but not typechecking,
+ -- we can still get back the GlobalRdrEnv and exports, so
+ -- perhaps the ModuleInfo should be split up into separate
+ -- fields within CheckedModule.
+
+type ParsedSource = Located (HsModule RdrName)
+type RenamedSource = HsGroup Name
+type TypecheckedSource = LHsBinds Id
+
+-- NOTE:
+-- - things that aren't in the output of the renamer:
+-- - the export list
+-- - the imports
+-- - things that aren't in the output of the typechecker right now:
+-- - the export list
+-- - the imports
+-- - type signatures
+-- - type/data/newtype declarations
+-- - class declarations
+-- - instances
+-- - extra things in the typechecker's output:
+-- - default methods are turned into top-level decls.
+-- - dictionary bindings
+
+
+-- | This is the way to get access to parsed and typechecked source code
+-- for a module. 'checkModule' loads all the dependencies of the specified
+-- module in the Session, and then attempts to typecheck the module. If
+-- successful, it returns the abstract syntax for the module.
+checkModule :: Session -> Module -> (Messages -> IO ())
+ -> IO (Maybe CheckedModule)
+checkModule session@(Session ref) mod msg_act = do
+ -- load up the dependencies first
+ r <- loadMsgs session (LoadDependenciesOf mod) msg_act
+ if (failed r) then return Nothing else do
+
+ -- now parse & typecheck the module
+ hsc_env <- readIORef ref
+ let mg = hsc_mod_graph hsc_env
+ case [ ms | ms <- mg, ms_mod ms == mod ] of
+ [] -> return Nothing
+ (ms:_) -> do
+ -- Add in the OPTIONS from the source file This is nasty:
+ -- we've done this once already, in the compilation manager
+ -- It might be better to cache the flags in the
+ -- ml_hspp_file field, say
+ let dflags0 = hsc_dflags hsc_env
+ hspp_buf = expectJust "GHC.checkModule" (ms_hspp_buf ms)
+ opts = getOptionsFromStringBuffer hspp_buf
+ (dflags1,leftovers) <- parseDynamicFlags dflags0 (map snd opts)
+ if (not (null leftovers))
+ then do let filename = fromJust (ml_hs_file (ms_location ms))
+ msg_act (optionsErrorMsgs leftovers opts filename)
+ return Nothing
+ else do
+
+ r <- hscFileCheck hsc_env{hsc_dflags=dflags1} msg_act ms
+ case r of
+ HscFail ->
+ return Nothing
+ HscChecked parsed renamed Nothing ->
+ return (Just (CheckedModule {
+ parsedSource = parsed,
+ renamedSource = renamed,
+ typecheckedSource = Nothing,
+ checkedModuleInfo = Nothing }))
+ HscChecked parsed renamed
+ (Just (tc_binds, rdr_env, details)) -> do
+ let minf = ModuleInfo {
+ minf_type_env = md_types details,
+ minf_exports = md_exports details,
+ minf_rdr_env = Just rdr_env,
+ minf_instances = md_insts details
+ }
+ return (Just (CheckedModule {
+ parsedSource = parsed,
+ renamedSource = renamed,
+ typecheckedSource = Just tc_binds,
+ checkedModuleInfo = Just minf }))
+ _other ->
+ panic "checkModule"
+
+-- ---------------------------------------------------------------------------
-- Unloading
unload :: HscEnv -> [Linkable] -> IO ()
unload hsc_env stable_linkables -- Unload everthing *except* 'stable_linkables'
= case ghcMode (hsc_dflags hsc_env) of
- BatchCompile -> return ()
+ BatchCompile -> return ()
+ JustTypecheck -> return ()
#ifdef GHCI
Interactive -> Linker.unload (hsc_dflags hsc_env) stable_linkables
#else
| otherwise = False
where
same_as_prev t = case lookupModuleEnv hpt (ms_mod ms) of
- Nothing -> True
Just hmi | Just l <- hm_linkable hmi
-> isObjectLinkable l && t == linkableTime l
+ _other -> True
-- why '>=' rather than '>' above? If the filesystem stores
-- times to the nearset second, we may occasionally find that
-- the object & source have the same modification time,
bco_ok ms
= case lookupModuleEnv hpt (ms_mod ms) of
- Nothing -> False
Just hmi | Just l <- hm_linkable hmi ->
not (isObjectLinkable l) &&
linkableTime l >= ms_hs_date ms
+ _other -> False
ms_allimps :: ModSummary -> [Module]
-ms_allimps ms = ms_srcimps ms ++ ms_imps ms
+ms_allimps ms = map unLoc (ms_srcimps ms ++ ms_imps ms)
-- -----------------------------------------------------------------------------
-- Prune the HomePackageTable
-> HomePackageTable -- HPT from last time round (pruned)
-> ([Module],[Module]) -- stable modules (see checkStability)
-> IO () -- How to clean up unwanted tmp files
+ -> (Messages -> IO ()) -- Compiler error message callback
-> [SCC ModSummary] -- Mods to do (the worklist)
-> IO (SuccessFlag,
HscEnv, -- With an updated HPT
[ModSummary]) -- Mods which succeeded
-upsweep hsc_env old_hpt stable_mods cleanup
- []
+upsweep hsc_env old_hpt stable_mods cleanup msg_act mods
+ = upsweep' hsc_env old_hpt stable_mods cleanup msg_act mods 1 (length mods)
+
+upsweep' hsc_env old_hpt stable_mods cleanup msg_act
+ [] _ _
= return (Succeeded, hsc_env, [])
-upsweep hsc_env old_hpt stable_mods cleanup
- (CyclicSCC ms:_)
- = do hPutStrLn stderr (showSDoc (cyclicModuleErr ms))
+upsweep' hsc_env old_hpt stable_mods cleanup msg_act
+ (CyclicSCC ms:_) _ _
+ = do putMsg (showSDoc (cyclicModuleErr ms))
return (Failed, hsc_env, [])
-upsweep hsc_env old_hpt stable_mods cleanup
- (AcyclicSCC mod:mods)
+upsweep' hsc_env old_hpt stable_mods cleanup msg_act
+ (AcyclicSCC mod:mods) mod_index nmods
= do -- putStrLn ("UPSWEEP_MOD: hpt = " ++
-- show (map (moduleUserString.moduleName.mi_module.hm_iface)
-- (moduleEnvElts (hsc_HPT hsc_env)))
- mb_mod_info <- upsweep_mod hsc_env old_hpt stable_mods mod
+ mb_mod_info <- upsweep_mod hsc_env old_hpt stable_mods msg_act mod
+ mod_index nmods
cleanup -- Remove unwanted tmp files between compilations
| otherwise = delModuleEnv old_hpt this_mod
; (restOK, hsc_env2, modOKs)
- <- upsweep hsc_env1 old_hpt1 stable_mods cleanup mods
+ <- upsweep' hsc_env1 old_hpt1 stable_mods cleanup
+ msg_act mods (mod_index+1) nmods
; return (restOK, hsc_env2, mod:modOKs)
}
upsweep_mod :: HscEnv
-> HomePackageTable
-> ([Module],[Module])
+ -> (Messages -> IO ())
-> ModSummary
+ -> Int -- index of module
+ -> Int -- total number of modules
-> IO (Maybe HomeModInfo) -- Nothing => Failed
-upsweep_mod hsc_env old_hpt (stable_obj, stable_bco) summary
+upsweep_mod hsc_env old_hpt (stable_obj, stable_bco) msg_act summary mod_index nmods
= do
let
this_mod = ms_mod summary
hs_date = ms_hs_date summary
compile_it :: Maybe Linkable -> IO (Maybe HomeModInfo)
- compile_it = upsweep_compile hsc_env old_hpt this_mod summary
+ compile_it = upsweep_compile hsc_env old_hpt this_mod
+ msg_act summary mod_index nmods
case ghcMode (hsc_dflags hsc_env) of
BatchCompile ->
old_hmi = lookupModuleEnv old_hpt this_mod
-- Run hsc to compile a module
-upsweep_compile hsc_env old_hpt this_mod summary mb_old_linkable = do
+upsweep_compile hsc_env old_hpt this_mod msg_act summary
+ mod_index nmods
+ mb_old_linkable = do
let
-- The old interface is ok if it's in the old HPT
-- a) we're compiling a source file, and the old HPT
- -- entry is for a source file
+ -- entry is for a source file
-- b) we're compiling a hs-boot file
-- Case (b) allows an hs-boot file to get the interface of its
-- real source file on the second iteration of the compilation
where
iface = hm_iface hm_info
- compresult <- compile hsc_env summary mb_old_linkable mb_old_iface
+ compresult <- compile hsc_env msg_act summary mb_old_linkable mb_old_iface
+ mod_index nmods
case compresult of
-- Compilation failed. Compile may still have updated the PCS, tho.
-> Maybe Module
-> [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)?
--
-- We use integers as the keys for the SCC algorithm
nodes :: [(ModSummary, Int, [Int])]
nodes = [(s, expectJust "topSort" (lookup_key (ms_hsc_src s) (ms_mod s)),
- out_edge_keys hs_boot_key (ms_srcimps s) ++
- out_edge_keys HsSrcFile (ms_imps s) )
+ out_edge_keys hs_boot_key (map unLoc (ms_srcimps s)) ++
+ out_edge_keys HsSrcFile (map unLoc (ms_imps s)) )
| s <- summaries
, not (isBootSummary s && drop_hs_boot_nodes) ]
-- Drop the hi-boot ones if told to do so
msKey :: ModSummary -> NodeKey
msKey (ModSummary { ms_mod = mod, ms_hsc_src = boot }) = (mod,boot)
-emptyNodeMap :: NodeMap a
-emptyNodeMap = emptyFM
-
mkNodeMap :: [ModSummary] -> NodeMap ModSummary
mkNodeMap summaries = listToFM [ (msKey s, s) | s <- summaries]
nodeMapElts :: NodeMap a -> [a]
nodeMapElts = eltsFM
--- -----------------------------------------------------------------
--- The unlinked image
---
--- The compilation manager keeps a list of compiled, but as-yet unlinked
--- binaries (byte code or object code). Even when it links bytecode
--- it keeps the unlinked version so it can re-link it later without
--- recompiling.
-
-type UnlinkedImage = [Linkable] -- the unlinked images (should be a set, really)
-
-findModuleLinkable_maybe :: [Linkable] -> Module -> Maybe Linkable
-findModuleLinkable_maybe lis mod
- = case [LM time nm us | LM time nm us <- lis, nm == mod] of
- [] -> Nothing
- [li] -> Just li
- many -> pprPanic "findModuleLinkable" (ppr mod)
-
-delModuleLinkable :: [Linkable] -> Module -> [Linkable]
-delModuleLinkable ls mod = [ l | l@(LM _ nm _) <- ls, nm /= mod ]
-
-----------------------------------------------------------------------------
-- Downsweep (dependency analysis)
-> [ModSummary] -- Old summaries
-> [Module] -- Ignore dependencies on these; treat them as
-- if they were package modules
- -> IO [ModSummary]
+ -> IO (Either Messages [ModSummary])
downsweep hsc_env old_summaries excl_mods
- = do rootSummaries <- mapM getRootSummary roots
- checkDuplicates rootSummaries
- loop (concatMap msDeps rootSummaries)
- (mkNodeMap rootSummaries)
+ = -- catch error messages and return them
+ handleDyn (\err_msg -> return (Left (emptyBag, unitBag err_msg))) $ do
+ rootSummaries <- mapM getRootSummary roots
+ checkDuplicates rootSummaries
+ summs <- loop (concatMap msDeps rootSummaries) (mkNodeMap rootSummaries)
+ return (Right summs)
where
roots = hsc_targets hsc_env
old_summary_map = mkNodeMap old_summaries
getRootSummary :: Target -> IO ModSummary
- getRootSummary (Target (TargetFile file) maybe_buf)
+ getRootSummary (Target (TargetFile file mb_phase) maybe_buf)
= do exists <- doesFileExist file
- if exists then summariseFile hsc_env file maybe_buf else do
- throwDyn (CmdLineError ("can't find file: " ++ file))
+ if exists
+ then summariseFile hsc_env old_summaries file mb_phase maybe_buf
+ else throwDyn $ mkPlainErrMsg noSrcSpan $
+ text "can't find file:" <+> text file
getRootSummary (Target (TargetModule modl) maybe_buf)
- = do maybe_summary <- summarise hsc_env emptyNodeMap Nothing False
- modl maybe_buf excl_mods
+ = do maybe_summary <- summariseModule hsc_env old_summary_map False
+ (L rootLoc modl) maybe_buf excl_mods
case maybe_summary of
Nothing -> packageModErr modl
Just s -> return s
+ rootLoc = mkGeneralSrcSpan FSLIT("<command line>")
+
-- In a root module, the filename is allowed to diverge from the module
-- name, so we have to check that there aren't multiple root files
-- defining the same module (otherwise the duplicates will be silently
[ expectJust "checkDup" (ml_hs_file (ms_location summ'))
| summ' <- summaries, ms_mod summ' == modl ]
- loop :: [(FilePath,Module,IsBootInterface)]
+ loop :: [(Located Module,IsBootInterface)]
-- Work list: process these modules
-> NodeMap ModSummary
-- Visited set
-- The result includes the worklist, except
-- for those mentioned in the visited set
loop [] done = return (nodeMapElts done)
- loop ((cur_path, wanted_mod, is_boot) : ss) done
+ loop ((wanted_mod, is_boot) : ss) done
| key `elemFM` done = loop ss done
- | otherwise = do { mb_s <- summarise hsc_env old_summary_map
- (Just cur_path) is_boot
- wanted_mod Nothing excl_mods
+ | otherwise = do { mb_s <- summariseModule hsc_env old_summary_map
+ is_boot wanted_mod Nothing excl_mods
; case mb_s of
Nothing -> loop ss done
Just s -> loop (msDeps s ++ ss)
(addToFM done key s) }
where
- key = (wanted_mod, if is_boot then HsBootFile else HsSrcFile)
+ key = (unLoc wanted_mod, if is_boot then HsBootFile else HsSrcFile)
-msDeps :: ModSummary -> [(FilePath, -- Importing module
- Module, -- Imported module
- IsBootInterface)] -- {-# SOURCE #-} import or not
+msDeps :: ModSummary -> [(Located Module, IsBootInterface)]
-- (msDeps s) returns the dependencies of the ModSummary s.
-- A wrinkle is that for a {-# SOURCE #-} import we return
-- *both* the hs-boot file
-- modules always contains B.hs if it contains B.hs-boot.
-- Remember, this pass isn't doing the topological sort. It's
-- just gathering the list of all relevant ModSummaries
-msDeps s = concat [ [(f, m, True), (f,m,False)] | m <- ms_srcimps s]
- ++ [(f,m,False) | m <- ms_imps s]
- where
- f = msHsFilePath s -- Keep the importing module for error reporting
-
+msDeps s =
+ concat [ [(m,True), (m,False)] | m <- ms_srcimps s ]
+ ++ [ (m,False) | m <- ms_imps s ]
-----------------------------------------------------------------------------
-- Summarising modules
-- a summary. The finder is used to locate the file in which the module
-- resides.
-summariseFile :: HscEnv -> FilePath
- -> Maybe (StringBuffer,ClockTime)
- -> IO ModSummary
--- Used for Haskell source only, I think
--- We know the file name, and we know it exists,
--- but we don't necessarily know the module name (might differ)
-summariseFile hsc_env file maybe_buf
- = do let dflags = hsc_dflags hsc_env
+summariseFile
+ :: HscEnv
+ -> [ModSummary] -- old summaries
+ -> FilePath -- source file name
+ -> Maybe Phase -- start phase
+ -> Maybe (StringBuffer,ClockTime)
+ -> IO ModSummary
+
+summariseFile hsc_env old_summaries file mb_phase maybe_buf
+ -- we can use a cached summary if one is available and the
+ -- source file hasn't changed, But we have to look up the summary
+ -- by source file, rather than module name as we do in summarise.
+ | Just old_summary <- findSummaryBySourceFile old_summaries file
+ = do
+ let location = ms_location old_summary
+
+ -- return the cached summary if the source didn't change
+ src_timestamp <- case maybe_buf of
+ Just (_,t) -> return t
+ Nothing -> getModificationTime file
+
+ if ms_hs_date old_summary == src_timestamp
+ then do -- update the object-file timestamp
+ obj_timestamp <- getObjTimestamp location False
+ return old_summary{ ms_obj_date = obj_timestamp }
+ else
+ new_summary
+
+ | otherwise
+ = new_summary
+ where
+ new_summary = do
+ let dflags = hsc_dflags hsc_env
(dflags', hspp_fn, buf)
- <- preprocessFile dflags file maybe_buf
+ <- preprocessFile dflags file mb_phase maybe_buf
- (srcimps,the_imps,mod) <- getImports dflags' buf hspp_fn
+ (srcimps,the_imps, L _ mod) <- getImports dflags' buf hspp_fn
-- Make a ModLocation for this file
location <- mkHomeModLocation dflags mod file
ms_hs_date = src_timestamp,
ms_obj_date = obj_timestamp })
+findSummaryBySourceFile :: [ModSummary] -> FilePath -> Maybe ModSummary
+findSummaryBySourceFile summaries file
+ = case [ ms | ms <- summaries, HsSrcFile <- [ms_hsc_src ms],
+ fromJust (ml_hs_file (ms_location ms)) == file ] of
+ [] -> Nothing
+ (x:xs) -> Just x
+
-- Summarise a module, and pick up source and timestamp.
-summarise :: HscEnv
+summariseModule
+ :: HscEnv
-> NodeMap ModSummary -- Map of old summaries
- -> Maybe FilePath -- Importing module (for error messages)
-> IsBootInterface -- True <=> a {-# SOURCE #-} import
- -> Module -- Imported module to be summarised
+ -> Located Module -- Imported module to be summarised
-> Maybe (StringBuffer, ClockTime)
-> [Module] -- Modules to exclude
-> IO (Maybe ModSummary) -- Its new summary
-summarise hsc_env old_summary_map cur_mod is_boot wanted_mod maybe_buf excl_mods
+summariseModule hsc_env old_summary_map is_boot (L loc wanted_mod) maybe_buf excl_mods
| wanted_mod `elem` excl_mods
= return Nothing
= do -- Find its new timestamp; all the
-- ModSummaries in the old map have valid ml_hs_files
let location = ms_location old_summary
- src_fn = expectJust "summarise" (ml_hs_file location)
+ src_fn = expectJust "summariseModule" (ml_hs_file location)
-- return the cached summary if the source didn't change
src_timestamp <- case maybe_buf of
-- Drop external-pkg
| isJust (ml_hs_file location) -> just_found location
-- Home package
- err -> noModError dflags cur_mod wanted_mod err
+ err -> noModError dflags loc wanted_mod err
-- Not found
where
dflags = hsc_dflags hsc_env
-- It might have been deleted since the Finder last found it
maybe_t <- modificationTimeIfExists src_fn
case maybe_t of
- Nothing -> noHsFileErr cur_mod src_fn
+ Nothing -> noHsFileErr loc src_fn
Just t -> new_summary location' src_fn Nothing t
= do
-- Preprocess the source file and get its imports
-- The dflags' contains the OPTIONS pragmas
- (dflags', hspp_fn, buf) <- preprocessFile dflags src_fn maybe_buf
- (srcimps, the_imps, mod_name) <- getImports dflags' buf hspp_fn
+ (dflags', hspp_fn, buf) <- preprocessFile dflags src_fn Nothing maybe_buf
+ (srcimps, the_imps, L mod_loc mod_name) <- getImports dflags' buf hspp_fn
when (mod_name /= wanted_mod) $
- throwDyn (ProgramError
- (showSDoc (text src_fn
- <> text ": file name does not match module name"
- <+> quotes (ppr mod_name))))
+ throwDyn $ mkPlainErrMsg mod_loc $
+ text "file name does not match module name"
+ <+> quotes (ppr mod_name)
-- Find the object timestamp, and return the summary
obj_timestamp <- getObjTimestamp location is_boot
else modificationTimeIfExists (ml_obj_file location)
-preprocessFile :: DynFlags -> FilePath -> Maybe (StringBuffer,ClockTime)
+preprocessFile :: DynFlags -> FilePath -> Maybe Phase -> Maybe (StringBuffer,ClockTime)
-> IO (DynFlags, FilePath, StringBuffer)
-preprocessFile dflags src_fn Nothing
+preprocessFile dflags src_fn mb_phase Nothing
= do
- (dflags', hspp_fn) <- preprocess dflags src_fn
+ (dflags', hspp_fn) <- preprocess dflags (src_fn, mb_phase)
buf <- hGetStringBuffer hspp_fn
return (dflags', hspp_fn, buf)
-preprocessFile dflags src_fn (Just (buf, time))
+preprocessFile dflags src_fn mb_phase (Just (buf, time))
= do
-- case we bypass the preprocessing stage?
let
local_opts = getOptionsFromStringBuffer buf
--
- (dflags', errs) <- parseDynamicFlags dflags local_opts
+ (dflags', errs) <- parseDynamicFlags dflags (map snd local_opts)
let
needs_preprocessing
- | Unlit _ <- startPhase src_fn = True
+ | Just (Unlit _) <- mb_phase = True
+ | Nothing <- mb_phase, Unlit _ <- startPhase src_fn = True
-- note: local_opts is only required if there's no Unlit phase
| dopt Opt_Cpp dflags' = True
| dopt Opt_Pp dflags' = True
when needs_preprocessing $
ghcError (ProgramError "buffer needs preprocesing; interactive check disabled")
- return (dflags', "<buffer>", buf)
+ return (dflags', src_fn, buf)
--- code adapted from the file-based version in DriverUtil
-getOptionsFromStringBuffer :: StringBuffer -> [String]
-getOptionsFromStringBuffer buffer@(StringBuffer _ len# _) =
- let
- ls = lines (lexemeToString buffer (I# len#)) -- lazy, so it's ok
- in
- look ls
- where
- look [] = []
- look (l':ls) = do
- let l = removeSpaces l'
- case () of
- () | null l -> look ls
- | prefixMatch "#" l -> look ls
- | prefixMatch "{-# LINE" l -> look ls -- -}
- | Just opts <- matchOptions l
- -> opts ++ look ls
- | otherwise -> []
-
-----------------------------------------------------------------------------
-- Error messages
-----------------------------------------------------------------------------
-noModError :: DynFlags -> Maybe FilePath -> Module -> FindResult -> IO ab
+noModError :: DynFlags -> SrcSpan -> Module -> FindResult -> IO ab
-- ToDo: we don't have a proper line number for this error
-noModError dflags cur_mod wanted_mod err
- = throwDyn $ ProgramError $ showSDoc $
- vcat [cantFindError dflags wanted_mod err,
- nest 2 (parens (pp_where cur_mod))]
+noModError dflags loc wanted_mod err
+ = throwDyn $ mkPlainErrMsg loc $ cantFindError dflags wanted_mod err
-noHsFileErr cur_mod path
- = throwDyn $ CmdLineError $ showSDoc $
- vcat [text "Can't find" <+> text path,
- nest 2 (parens (pp_where cur_mod))]
+noHsFileErr loc path
+ = throwDyn $ mkPlainErrMsg loc $ text "Can't find" <+> text path
-pp_where Nothing = text "one of the roots of the dependency analysis"
-pp_where (Just p) = text "imported from" <+> text p
-
packageModErr mod
- = throwDyn (CmdLineError (showSDoc (text "module" <+>
- quotes (ppr mod) <+>
- text "is a package module")))
+ = throwDyn $ mkPlainErrMsg noSrcSpan $
+ text "module" <+> quotes (ppr mod) <+> text "is a package module"
multiRootsErr mod files
- = throwDyn (ProgramError (showSDoc (
+ = throwDyn $ mkPlainErrMsg noSrcSpan $
text "module" <+> quotes (ppr mod) <+>
text "is defined in multiple files:" <+>
- sep (map text files))))
+ sep (map text files)
cyclicModuleErr :: [ModSummary] -> SDoc
cyclicModuleErr ms
getPrintUnqual :: Session -> IO PrintUnqualified
getPrintUnqual s = withSession s (return . icPrintUnqual . hsc_IC)
-#if 0
-getModuleInfo :: Session -> Module -> IO ModuleInfo
-
-data ObjectCode
- = ByteCode
- | BinaryCode FilePath
-
+-- | Container for information about a 'Module'.
data ModuleInfo = ModuleInfo {
- lm_modulename :: Module,
- lm_summary :: ModSummary,
- lm_interface :: ModIface,
- lm_tc_code :: Maybe TypecheckedCode,
- lm_rn_code :: Maybe RenamedCode,
- lm_obj :: Maybe ObjectCode
+ minf_type_env :: TypeEnv,
+ minf_exports :: NameSet,
+ minf_rdr_env :: Maybe GlobalRdrEnv, -- Nothing for a compiled/package mod
+ minf_instances :: [Instance]
+ -- ToDo: this should really contain the ModIface too
}
+ -- We don't want HomeModInfo here, because a ModuleInfo applies
+ -- to package modules too.
+
+-- | Request information about a loaded 'Module'
+getModuleInfo :: Session -> Module -> IO (Maybe ModuleInfo)
+getModuleInfo s mdl = withSession s $ \hsc_env -> do
+ let mg = hsc_mod_graph hsc_env
+ if mdl `elem` map ms_mod mg
+ then getHomeModuleInfo hsc_env mdl
+ else do
+ if isHomeModule (hsc_dflags hsc_env) mdl
+ then return Nothing
+ else getPackageModuleInfo hsc_env mdl
+ -- getPackageModuleInfo will attempt to find the interface, so
+ -- we don't want to call it for a home module, just in case there
+ -- was a problem loading the module and the interface doesn't
+ -- exist... hence the isHomeModule test here.
+
+getPackageModuleInfo :: HscEnv -> Module -> IO (Maybe ModuleInfo)
+getPackageModuleInfo hsc_env mdl = do
+#ifdef GHCI
+ (_msgs, mb_names) <- getModuleExports hsc_env mdl
+ case mb_names of
+ Nothing -> return Nothing
+ Just names -> do
+ eps <- readIORef (hsc_EPS hsc_env)
+ let
+ pte = eps_PTE eps
+ n_list = nameSetToList names
+ tys = [ ty | name <- n_list,
+ Just ty <- [lookupTypeEnv pte name] ]
+ --
+ return (Just (ModuleInfo {
+ minf_type_env = mkTypeEnv tys,
+ minf_exports = names,
+ minf_rdr_env = Just $! nameSetToGlobalRdrEnv names mdl,
+ minf_instances = error "getModuleInfo: instances for package module unimplemented"
+ }))
+#else
+ -- bogusly different for non-GHCI (ToDo)
+ return Nothing
+#endif
-type TypecheckedCode = HsTypecheckedGroup
-type RenamedCode = [HsGroup Name]
+getHomeModuleInfo hsc_env mdl =
+ case lookupModuleEnv (hsc_HPT hsc_env) mdl of
+ Nothing -> return Nothing
+ Just hmi -> do
+ let details = hm_details hmi
+ return (Just (ModuleInfo {
+ minf_type_env = md_types details,
+ minf_exports = md_exports details,
+ minf_rdr_env = mi_globals $! hm_iface hmi,
+ minf_instances = md_insts details
+ }))
+
+-- | The list of top-level entities defined in a module
+modInfoTyThings :: ModuleInfo -> [TyThing]
+modInfoTyThings minf = typeEnvElts (minf_type_env minf)
+
+modInfoTopLevelScope :: ModuleInfo -> Maybe [Name]
+modInfoTopLevelScope minf
+ = fmap (map gre_name . globalRdrEnvElts) (minf_rdr_env minf)
+
+modInfoExports :: ModuleInfo -> [Name]
+modInfoExports minf = nameSetToList $! minf_exports minf
+
+-- | Returns the instances defined by the specified module.
+-- Warning: currently unimplemented for package modules.
+modInfoInstances :: ModuleInfo -> [Instance]
+modInfoInstances = minf_instances
+
+modInfoIsExportedName :: ModuleInfo -> Name -> Bool
+modInfoIsExportedName minf name = elemNameSet name (minf_exports minf)
+
+modInfoPrintUnqualified :: ModuleInfo -> Maybe PrintUnqualified
+modInfoPrintUnqualified minf = fmap unQualInScope (minf_rdr_env minf)
+
+modInfoLookupName :: Session -> ModuleInfo -> Name -> IO (Maybe TyThing)
+modInfoLookupName s minf name = withSession s $ \hsc_env -> do
+ case lookupTypeEnv (minf_type_env minf) name of
+ Just tyThing -> return (Just tyThing)
+ Nothing -> do
+ eps <- readIORef (hsc_EPS hsc_env)
+ return $! lookupType (hsc_HPT hsc_env) (eps_PTE eps) name
+
+isDictonaryId :: Id -> Bool
+isDictonaryId id
+ = case tcSplitSigmaTy (idType id) of { (tvs, theta, tau) -> isDictTy tau }
+
+-- | 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'.
+lookupGlobalName :: Session -> Name -> IO (Maybe TyThing)
+lookupGlobalName s name = withSession s $ \hsc_env -> do
+ eps <- readIORef (hsc_EPS hsc_env)
+ return $! lookupType (hsc_HPT hsc_env) (eps_PTE eps) name
--- ToDo: typechecks abstract syntax or renamed abstract syntax. Issues:
--- - typechecked syntax includes extra dictionary translation and
--- AbsBinds which need to be translated back into something closer to
--- the original source.
--- - renamed syntax currently doesn't exist in a single blob, since
--- renaming and typechecking are interleaved at splice points. We'd
--- need a restriction that there are no splices in the source module.
+-- -----------------------------------------------------------------------------
+-- Misc exported utils
--- ToDo:
--- - Data and Typeable instances for HsSyn.
+dataConType :: DataCon -> Type
+dataConType dc = idType (dataConWrapId dc)
--- ToDo:
--- - things that aren't in the output of the renamer:
--- - the export list
--- - the imports
+-- | print a 'NamedThing', adding parentheses if the name is an operator.
+pprParenSymName :: NamedThing a => a -> SDoc
+pprParenSymName a = parenSymOcc (getOccName a) (ppr (getName a))
+
+-- ----------------------------------------------------------------------------
+
+#if 0
-- ToDo:
--- - things that aren't in the output of the typechecker right now:
--- - the export list
--- - the imports
--- - type signatures
--- - type/data/newtype declarations
--- - class declarations
--- - instances
--- - extra things in the typechecker's output:
--- - default methods are turned into top-level decls.
--- - dictionary bindings
+-- - Data and Typeable instances for HsSyn.
-- ToDo: check for small transformations that happen to the syntax in
-- the typechecker (eg. -e ==> negate e, perhaps for fromIntegral)
-- :browse will use either lm_toplev or inspect lm_interface, depending
-- on whether the module is interpreted or not.
--- various abstract syntax types (perhaps IfaceBlah)
-data Type = ...
-data Kind = ...
-
-- This is for reconstructing refactored source code
-- Calls the lexer repeatedly.
-- ToDo: add comment tokens to token stream
ic_exports = exports,
ic_rn_gbl_env = all_env } }
+-- Make a GlobalRdrEnv based on the exports of the modules only.
+mkExportEnv :: HscEnv -> [Module] -> IO GlobalRdrEnv
+mkExportEnv hsc_env mods = do
+ stuff <- mapM (getModuleExports hsc_env) mods
+ let
+ (_msgs, mb_name_sets) = unzip stuff
+ gres = [ nameSetToGlobalRdrEnv name_set mod
+ | (Just name_set, mod) <- zip mb_name_sets mods ]
+ --
+ return $! foldr plusGlobalRdrEnv emptyGlobalRdrEnv gres
+
+nameSetToGlobalRdrEnv :: NameSet -> Module -> GlobalRdrEnv
+nameSetToGlobalRdrEnv names mod =
+ mkGlobalRdrEnv [ GRE { gre_name = name, gre_prov = vanillaProv mod }
+ | name <- nameSetToList names ]
+
+vanillaProv :: Module -> Provenance
+-- We're building a GlobalRdrEnv as if the user imported
+-- all the specified modules into the global interactive module
+vanillaProv mod = Imported [ImpSpec { is_decl = decl, is_item = ImpAll}]
+ where
+ decl = ImpDeclSpec { is_mod = mod, is_as = mod,
+ is_qual = False,
+ is_dloc = srcLocSpan interactiveSrcLoc }
+
checkModuleExists :: HscEnv -> HomePackageTable -> Module -> IO ()
checkModuleExists hsc_env hpt mod =
case lookupModuleEnv hpt mod of
_not_a_home_module -> return False
-- | Looks up an identifier in the current interactive context (for :info)
-getInfo :: Session -> String -> IO [GetInfoResult]
-getInfo s id = withSession s $ \hsc_env -> hscGetInfo hsc_env id
+getInfo :: Session -> Name -> IO (Maybe (TyThing,Fixity,[Instance]))
+getInfo s name = withSession s $ \hsc_env -> tcRnGetInfo hsc_env name
+
+-- | Returns all names in scope in the current interactive context
+getNamesInScope :: Session -> IO [Name]
+getNamesInScope s = withSession s $ \hsc_env -> do
+ return (map gre_name (globalRdrEnvElts (ic_rn_gbl_env (hsc_IC hsc_env))))
+
+-- | Parses a string as an identifier, and returns the list of 'Name's that
+-- the identifier can refer to in the current interactive context.
+parseName :: Session -> String -> IO [Name]
+parseName s str = withSession s $ \hsc_env -> do
+ maybe_rdr_name <- hscParseIdentifier (hsc_dflags hsc_env) str
+ case maybe_rdr_name of
+ Nothing -> return []
+ Just (L _ rdr_name) -> do
+ mb_names <- tcRnLookupRdrName hsc_env rdr_name
+ case mb_names of
+ Nothing -> return []
+ Just ns -> return ns
+ -- ToDo: should return error messages
+
+-- | Returns the 'TyThing' for a 'Name'. The 'Name' may refer to any
+-- entity known to GHC, including 'Name's defined using 'runStmt'.
+lookupName :: Session -> Name -> IO (Maybe TyThing)
+lookupName s name = withSession s $ \hsc_env -> tcRnLookupName hsc_env name
-- -----------------------------------------------------------------------------
-- Getting the type of an expression
Just ty -> return (Just tidy_ty)
where
tidy_ty = tidyType emptyTidyEnv ty
- dflags = hsc_dflags hsc_env
-- -----------------------------------------------------------------------------
-- Getting the kind of a type
Just kind -> return (Just kind)
-----------------------------------------------------------------------------
--- lookupName: returns the TyThing for a Name in the interactive context.
--- ToDo: should look it up in the full environment
-
-lookupName :: Session -> Name -> IO (Maybe TyThing)
-lookupName s name = withSession s $ \hsc_env -> do
- return $! lookupNameEnv (ic_type_env (hsc_IC hsc_env)) name
-
------------------------------------------------------------------------------
-- cmCompileExpr: compile an expression and deliver an HValue
compileExpr :: Session -> String -> IO (Maybe HValue)
-- more informative than the C type!
-}
--- ---------------------------------------------------------------------------
--- cmBrowseModule: get all the TyThings defined in a module
-
-browseModule :: Session -> Module -> Bool -> IO [IfaceDecl]
-browseModule s modl exports_only = withSession s $ \hsc_env -> do
- mb_decls <- getModuleContents hsc_env modl exports_only
- case mb_decls of
- Nothing -> return [] -- An error of some kind
- Just ds -> return ds
-
-
-----------------------------------------------------------------------------
-- show a module and it's source/object filenames
projects / ghc-hetmet.git / blobdiff