86 lines
3.0 KiB
Haskell
86 lines
3.0 KiB
Haskell
module Language.Haskell.GhcMod.Info (
|
|
infoExpr
|
|
, info
|
|
, typeExpr
|
|
, types
|
|
) where
|
|
|
|
import Control.Applicative ((<$>))
|
|
import Data.Function (on)
|
|
import Data.List (sortBy)
|
|
import Data.Maybe (catMaybes)
|
|
import Exception (ghandle, SomeException(..))
|
|
import GHC (Ghc, LHsBind, LHsExpr, LPat, Id, TypecheckedModule(..), SrcSpan, Type)
|
|
import qualified GHC as G
|
|
import Language.Haskell.GhcMod.Doc (showPage)
|
|
import Language.Haskell.GhcMod.GHCApi
|
|
import Language.Haskell.GhcMod.Gap (HasType(..))
|
|
import qualified Language.Haskell.GhcMod.Gap as Gap
|
|
import Language.Haskell.GhcMod.SrcUtils
|
|
import Language.Haskell.GhcMod.Types
|
|
import Language.Haskell.GhcMod.Convert
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Obtaining information of a target expression. (GHCi's info:)
|
|
infoExpr :: Options
|
|
-> Cradle
|
|
-> FilePath -- ^ A target file.
|
|
-> Expression -- ^ A Haskell expression.
|
|
-> IO String
|
|
infoExpr opt cradle file expr = withGHC' $ do
|
|
initializeFlagsWithCradle opt cradle
|
|
info opt file expr
|
|
|
|
-- | Obtaining information of a target expression. (GHCi's info:)
|
|
info :: Options
|
|
-> FilePath -- ^ A target file.
|
|
-> Expression -- ^ A Haskell expression.
|
|
-> Ghc String
|
|
info opt file expr = convert opt <$> ghandle handler body
|
|
where
|
|
body = inModuleContext file $ \dflag style -> do
|
|
sdoc <- Gap.infoThing expr
|
|
return $ showPage dflag style sdoc
|
|
handler (SomeException _) = return "Cannot show info"
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Obtaining type of a target expression. (GHCi's type:)
|
|
typeExpr :: Options
|
|
-> Cradle
|
|
-> FilePath -- ^ A target file.
|
|
-> Int -- ^ Line number.
|
|
-> Int -- ^ Column number.
|
|
-> IO String
|
|
typeExpr opt cradle file lineNo colNo = withGHC' $ do
|
|
initializeFlagsWithCradle opt cradle
|
|
types opt file lineNo colNo
|
|
|
|
-- | Obtaining type of a target expression. (GHCi's type:)
|
|
types :: Options
|
|
-> FilePath -- ^ A target file.
|
|
-> Int -- ^ Line number.
|
|
-> Int -- ^ Column number.
|
|
-> Ghc String
|
|
types opt file lineNo colNo = convert opt <$> ghandle handler body
|
|
where
|
|
body = inModuleContext file $ \dflag style -> do
|
|
modSum <- Gap.fileModSummary file
|
|
srcSpanTypes <- getSrcSpanType modSum lineNo colNo
|
|
return $ map (toTup dflag style) $ sortBy (cmp `on` fst) srcSpanTypes
|
|
handler (SomeException _) = return []
|
|
|
|
getSrcSpanType :: G.ModSummary -> Int -> Int -> Ghc [(SrcSpan, Type)]
|
|
getSrcSpanType modSum lineNo colNo = do
|
|
p <- G.parseModule modSum
|
|
tcm@TypecheckedModule{tm_typechecked_source = tcs} <- G.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
|
|
return $ catMaybes $ concat [ets, bts, pts]
|
|
|