80 lines
2.5 KiB
Haskell
80 lines
2.5 KiB
Haskell
module GhcMod.Exe.Info (
|
|
info
|
|
, types
|
|
) where
|
|
|
|
import Data.Function (on)
|
|
import Data.List (sortBy)
|
|
import System.FilePath
|
|
import Exception (ghandle, SomeException(..))
|
|
import GHC (GhcMonad, SrcSpan)
|
|
import Prelude
|
|
import qualified GHC as G
|
|
|
|
import qualified GhcMod.Gap as Gap
|
|
import GhcMod.Convert
|
|
import GhcMod.Doc
|
|
import GhcMod.DynFlags
|
|
import GhcMod.Gap
|
|
import GhcMod.Logging
|
|
import GhcMod.Monad
|
|
import GhcMod.SrcUtils
|
|
import GhcMod.Types
|
|
import GhcMod.Utils (mkRevRedirMapFunc)
|
|
import GhcMod.FileMapping (fileModSummaryWithMapping)
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Obtaining information of a target expression. (GHCi's info:)
|
|
info :: IOish m
|
|
=> FilePath -- ^ A target file.
|
|
-> Expression -- ^ A Haskell expression.
|
|
-> GhcModT m String
|
|
info file expr =
|
|
ghandle handler $
|
|
runGmlT' [Left file] deferErrors $
|
|
withInteractiveContext $ do
|
|
convert' =<< body
|
|
where
|
|
handler (SomeException ex) = do
|
|
gmLog GmException "info" $ text "" $$ nest 4 (showToDoc ex)
|
|
convert' "Cannot show info"
|
|
|
|
body :: (GhcMonad m, GmState m, GmEnv m) => m String
|
|
body = do
|
|
m <- mkRevRedirMapFunc
|
|
sdoc <- Gap.infoThing m expr
|
|
st <- getStyle
|
|
dflag <- G.getSessionDynFlags
|
|
return $ showPage dflag st sdoc
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | Obtaining type of a target expression. (GHCi's type:)
|
|
types :: IOish m
|
|
=> Bool -- ^ Include constraints into type signature
|
|
-> FilePath -- ^ A target file.
|
|
-> Int -- ^ Line number.
|
|
-> Int -- ^ Column number.
|
|
-> GhcModT m String
|
|
types withConstraints file lineNo colNo =
|
|
ghandle handler $
|
|
runGmlT' [Left file] deferErrors $
|
|
withInteractiveContext $ do
|
|
crdl <- cradle
|
|
modSum <- fileModSummaryWithMapping (cradleCurrentDir crdl </> file)
|
|
srcSpanTypes <- getSrcSpanType withConstraints modSum lineNo colNo
|
|
dflag <- G.getSessionDynFlags
|
|
st <- getStyle
|
|
convert' $ map (toTup dflag st) $ sortBy (cmp `on` fst) srcSpanTypes
|
|
where
|
|
handler (SomeException ex) = do
|
|
gmLog GmException "types" $ showToDoc ex
|
|
return []
|
|
|
|
getSrcSpanType :: (GhcMonad m) => Bool -> G.ModSummary -> Int -> Int -> m [(SrcSpan, G.Type)]
|
|
getSrcSpanType withConstraints modSum lineNo colNo =
|
|
G.parseModule modSum
|
|
>>= G.typecheckModule
|
|
>>= flip (collectSpansTypes withConstraints) (lineNo, colNo)
|