78 lines
2.8 KiB
Haskell
78 lines
2.8 KiB
Haskell
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{-# LANGUAGE TupleSections, FlexibleInstances, Rank2Types #-}
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{-# OPTIONS_GHC -fno-warn-orphans #-}
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module Language.Haskell.GhcMod.SrcUtils where
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import Control.Applicative ((<$>))
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import CoreMonad (liftIO)
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import CoreUtils (exprType)
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import Data.Generics
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import Data.Maybe (fromMaybe)
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import Data.Ord as O
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import GHC (Ghc, LHsExpr, LPat, Id, DynFlags, SrcSpan, Type, Located, ParsedSource, RenamedSource, TypecheckedSource, GenLocated(L))
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import qualified GHC as G
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import GHC.SYB.Utils (Stage(..), everythingStaged)
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import Language.Haskell.GhcMod.Doc (showOneLine, getStyle)
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import Language.Haskell.GhcMod.GHCApi
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import Language.Haskell.GhcMod.Gap (HasType(..), setWarnTypedHoles, setDeferTypeErrors)
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import qualified Language.Haskell.GhcMod.Gap as Gap
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import Outputable (PprStyle)
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import TcHsSyn (hsPatType)
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----------------------------------------------------------------
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instance HasType (LHsExpr Id) where
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getType tcm e = do
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hs_env <- G.getSession
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mbe <- liftIO $ Gap.deSugar tcm e hs_env
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return $ (G.getLoc e, ) <$> CoreUtils.exprType <$> mbe
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instance HasType (LPat Id) where
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getType _ (G.L spn pat) = return $ Just (spn, hsPatType pat)
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----------------------------------------------------------------
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listifySpans :: Typeable a => TypecheckedSource -> (Int, Int) -> [Located a]
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listifySpans tcs lc = listifyStaged TypeChecker p tcs
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where
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p (L spn _) = G.isGoodSrcSpan spn && spn `G.spans` lc
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listifyParsedSpans :: Typeable a => ParsedSource -> (Int, Int) -> [Located a]
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listifyParsedSpans pcs lc = listifyStaged Parser p pcs
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where
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p (L spn _) = G.isGoodSrcSpan spn && spn `G.spans` lc
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listifyRenamedSpans :: Typeable a => RenamedSource -> (Int, Int) -> [Located a]
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listifyRenamedSpans pcs lc = listifyStaged Renamer p pcs
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where
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p (L spn _) = G.isGoodSrcSpan spn && spn `G.spans` lc
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listifyStaged :: Typeable r => Stage -> (r -> Bool) -> GenericQ [r]
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listifyStaged s p = everythingStaged s (++) [] ([] `mkQ` (\x -> [x | p x]))
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cmp :: SrcSpan -> SrcSpan -> Ordering
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cmp a b
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| a `G.isSubspanOf` b = O.LT
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| b `G.isSubspanOf` a = O.GT
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| otherwise = O.EQ
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toTup :: DynFlags -> PprStyle -> (SrcSpan, Type) -> ((Int,Int,Int,Int),String)
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toTup dflag style (spn, typ) = (fourInts spn, pretty dflag style typ)
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fourInts :: SrcSpan -> (Int,Int,Int,Int)
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fourInts = fromMaybe (0,0,0,0) . Gap.getSrcSpan
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pretty :: DynFlags -> PprStyle -> Type -> String
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pretty dflag style = showOneLine dflag style . Gap.typeForUser
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----------------------------------------------------------------
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inModuleContext :: FilePath -> (DynFlags -> PprStyle -> Ghc a) -> Ghc a
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inModuleContext file action =
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withDynFlags (setWarnTypedHoles . setDeferTypeErrors . setNoWaringFlags) $ do
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setTargetFiles [file]
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Gap.withContext $ do
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dflag <- G.getSessionDynFlags
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style <- getStyle
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action dflag style
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