178 lines
6.6 KiB
Haskell
178 lines
6.6 KiB
Haskell
{-# LANGUAGE TupleSections, FlexibleInstances, TypeSynonymInstances #-}
|
|
{-# LANGUAGE Rank2Types #-}
|
|
|
|
module Language.Haskell.GhcMod.Info (infoExpr, info, typeExpr, typeOf) where
|
|
|
|
import Control.Applicative
|
|
import Control.Monad (void, when)
|
|
import CoreUtils
|
|
import Data.Function
|
|
import Data.Generics hiding (typeOf)
|
|
import Data.List
|
|
import Data.Maybe
|
|
import Data.Ord as O
|
|
import Data.Time.Clock
|
|
import Desugar
|
|
import GHC
|
|
import GHC.SYB.Utils
|
|
import HscTypes
|
|
import Language.Haskell.GhcMod.Doc
|
|
import Language.Haskell.GhcMod.GHCApi
|
|
import Language.Haskell.GhcMod.GHCChoice
|
|
import qualified Language.Haskell.GhcMod.Gap as Gap
|
|
import Language.Haskell.GhcMod.Types
|
|
import NameSet
|
|
import Outputable
|
|
import PprTyThing
|
|
import TcHsSyn (hsPatType)
|
|
import TcRnTypes
|
|
|
|
----------------------------------------------------------------
|
|
|
|
type Expression = String
|
|
type ModuleString = String
|
|
|
|
data Cmd = Info | Type deriving Eq
|
|
|
|
----------------------------------------------------------------
|
|
|
|
infoExpr :: Options -> Cradle -> ModuleString -> Expression -> FilePath -> IO String
|
|
infoExpr opt cradle modstr expr file = (++ "\n") <$> withGHCDummyFile (info opt cradle file modstr expr)
|
|
|
|
info :: Options -> Cradle -> FilePath -> ModuleString -> Expression -> Ghc String
|
|
info opt cradle fileName modstr expr =
|
|
inModuleContext Info opt cradle fileName modstr exprToInfo "Cannot show info"
|
|
where
|
|
exprToInfo = infoThing expr
|
|
|
|
----------------------------------------------------------------
|
|
|
|
class HasType a where
|
|
getType :: GhcMonad m => TypecheckedModule -> a -> m (Maybe (SrcSpan, Type))
|
|
|
|
instance HasType (LHsExpr Id) where
|
|
getType tcm e = do
|
|
hs_env <- getSession
|
|
(_, mbe) <- Gap.liftIO $ deSugarExpr hs_env modu rn_env ty_env e
|
|
return $ (getLoc e, ) <$> CoreUtils.exprType <$> mbe
|
|
where
|
|
modu = ms_mod $ pm_mod_summary $ tm_parsed_module tcm
|
|
rn_env = tcg_rdr_env $ fst $ tm_internals_ tcm
|
|
ty_env = tcg_type_env $ fst $ tm_internals_ tcm
|
|
|
|
instance HasType (LHsBind Id) where
|
|
getType _ (L spn FunBind{fun_matches = MatchGroup _ typ}) = return $ Just (spn, typ)
|
|
getType _ _ = return Nothing
|
|
|
|
instance HasType (LPat Id) where
|
|
getType _ (L spn pat) = return $ Just (spn, hsPatType pat)
|
|
|
|
typeExpr :: Options -> Cradle -> ModuleString -> Int -> Int -> FilePath -> IO String
|
|
typeExpr opt cradle modstr lineNo colNo file = withGHCDummyFile $ typeOf opt cradle file modstr lineNo colNo
|
|
|
|
typeOf :: Options -> Cradle -> FilePath -> ModuleString -> Int -> Int -> Ghc String
|
|
typeOf opt cradle fileName modstr lineNo colNo =
|
|
inModuleContext Type opt cradle fileName modstr exprToType errmsg
|
|
where
|
|
exprToType = do
|
|
modSum <- getModSummary $ mkModuleName modstr
|
|
p <- parseModule modSum
|
|
tcm@TypecheckedModule{tm_typechecked_source = tcs} <- typecheckModule p
|
|
let bs = listifySpans tcs (lineNo, colNo) :: [LHsBind Id]
|
|
es = listifySpans tcs (lineNo, colNo) :: [LHsExpr Id]
|
|
ps = listifySpans tcs (lineNo, colNo) :: [LPat Id]
|
|
bts <- mapM (getType tcm) bs
|
|
ets <- mapM (getType tcm) es
|
|
pts <- mapM (getType tcm) ps
|
|
dflag <- getSessionDynFlags
|
|
let sss = map (toTup dflag) $ sortBy (cmp `on` fst) $ catMaybes $ concat [ets, bts, pts]
|
|
return $ convert opt sss
|
|
|
|
toTup :: DynFlags -> (SrcSpan, Type) -> ((Int,Int,Int,Int),String)
|
|
toTup dflag (spn, typ) = (fourInts spn, pretty dflag typ)
|
|
|
|
fourInts :: SrcSpan -> (Int,Int,Int,Int)
|
|
fourInts = fromMaybe (0,0,0,0) . Gap.getSrcSpan
|
|
|
|
cmp a b
|
|
| a `isSubspanOf` b = O.LT
|
|
| b `isSubspanOf` a = O.GT
|
|
| otherwise = O.EQ
|
|
|
|
errmsg = convert opt ([] :: [((Int,Int,Int,Int),String)])
|
|
|
|
listifySpans :: Typeable a => TypecheckedSource -> (Int, Int) -> [Located a]
|
|
listifySpans tcs lc = listifyStaged TypeChecker p tcs
|
|
where
|
|
p (L spn _) = isGoodSrcSpan spn && spn `spans` lc
|
|
|
|
listifyStaged :: Typeable r => Stage -> (r -> Bool) -> GenericQ [r]
|
|
listifyStaged s p = everythingStaged s (++) [] ([] `mkQ` (\x -> [x | p x]))
|
|
|
|
pretty :: DynFlags -> Type -> String
|
|
pretty dflag = showUnqualifiedOneLine dflag . pprTypeForUser False
|
|
|
|
----------------------------------------------------------------
|
|
-- from ghc/InteractiveUI.hs
|
|
|
|
infoThing :: String -> Ghc String
|
|
infoThing str = do
|
|
names <- parseName str
|
|
mb_stuffs <- mapM getInfo names
|
|
let filtered = filterOutChildren (\(t,_f,_i) -> t) (catMaybes mb_stuffs)
|
|
dflag <- getSessionDynFlags
|
|
return $ showUnqualifiedPage dflag $ vcat (intersperse (text "") $ map (pprInfo False) filtered)
|
|
|
|
filterOutChildren :: (a -> TyThing) -> [a] -> [a]
|
|
filterOutChildren get_thing xs
|
|
= [x | x <- xs, not (getName (get_thing x) `elemNameSet` implicits)]
|
|
where
|
|
implicits = mkNameSet [getName t | x <- xs, t <- implicitTyThings (get_thing x)]
|
|
|
|
pprInfo :: PrintExplicitForalls -> (TyThing, GHC.Fixity, [Gap.ClsInst]) -> SDoc
|
|
pprInfo pefas (thing, fixity, insts)
|
|
= pprTyThingInContextLoc pefas thing
|
|
$$ show_fixity fixity
|
|
$$ vcat (map pprInstance insts)
|
|
where
|
|
show_fixity fx
|
|
| fx == defaultFixity = Outputable.empty
|
|
| otherwise = ppr fx <+> ppr (getName thing)
|
|
|
|
----------------------------------------------------------------
|
|
|
|
inModuleContext :: Cmd -> Options -> Cradle -> FilePath -> ModuleString -> Ghc String -> String -> Ghc String
|
|
inModuleContext cmd opt cradle fileName modstr action errmsg =
|
|
valid ||> invalid ||> return errmsg
|
|
where
|
|
valid = do
|
|
void $ initializeFlagsWithCradle opt cradle ["-w:"] False
|
|
when (cmd == Info) setSlowDynFlags
|
|
setTargetFile fileName
|
|
checkSlowAndSet
|
|
void $ load LoadAllTargets
|
|
doif setContextFromTarget action
|
|
invalid = do
|
|
void $ initializeFlagsWithCradle opt cradle ["-w:"] False
|
|
setTargetBuffer
|
|
checkSlowAndSet
|
|
void $ load LoadAllTargets
|
|
doif setContextFromTarget action
|
|
setTargetBuffer = do
|
|
modgraph <- depanal [mkModuleName modstr] True
|
|
dflag <- getSessionDynFlags
|
|
let imports = concatMap (map (showQualifiedPage dflag . ppr . unLoc)) $
|
|
map ms_imps modgraph ++ map ms_srcimps modgraph
|
|
moddef = "module " ++ sanitize modstr ++ " where"
|
|
header = moddef : imports
|
|
importsBuf <- Gap.toStringBuffer header
|
|
clkTime <- Gap.liftIO getCurrentTime
|
|
setTargets [Gap.mkTarget (TargetModule $ mkModuleName modstr)
|
|
True
|
|
(Just (importsBuf, clkTime))]
|
|
doif m t = m >>= \ok -> if ok then t else goNext
|
|
sanitize = fromMaybe "SomeModule" . listToMaybe . words
|
|
|
|
setContextFromTarget :: Ghc Bool
|
|
setContextFromTarget = depanal [] False >>= Gap.setCtx
|