298 lines
8.3 KiB
Haskell
298 lines
8.3 KiB
Haskell
{-# LANGUAGE TypeSynonymInstances, FlexibleInstances, CPP #-}
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module Language.Haskell.GhcMod.Gap (
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Language.Haskell.GhcMod.Gap.ClsInst
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, mkTarget
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, withStyle
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, styleUnqualified
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, showUnqualifiedPage
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, setLogAction
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, supportedExtensions
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, getSrcSpan
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, getSrcFile
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, setCtx
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, fOptions
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, toStringBuffer
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, liftIO
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, showSeverityCaption
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, setCabalPkg
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, addDevPkgs
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, filterOutChildren
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, infoThing
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, pprInfo
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, HasType(..)
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#if __GLASGOW_HASKELL__ >= 702
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#else
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, module Pretty
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#endif
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) where
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import Control.Applicative hiding (empty)
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import Control.Monad
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import Data.Time.Clock
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import Data.List
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import Data.Maybe
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import DynFlags
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import ErrUtils
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import FastString
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import GHC hiding (ClsInst)
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import Language.Haskell.GhcMod.GHCChoice
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import Language.Haskell.GhcMod.Types
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import Outputable
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import StringBuffer
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import TcType
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import NameSet
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import HscTypes
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import PprTyThing
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import qualified InstEnv
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import qualified Pretty
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import qualified StringBuffer as SB
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#if __GLASGOW_HASKELL__ >= 707
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import FamInstEnv
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#endif
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#if __GLASGOW_HASKELL__ >= 702
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import CoreMonad (liftIO)
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#else
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import HscTypes (liftIO)
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import Pretty
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#endif
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#if __GLASGOW_HASKELL__ < 706
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import Control.Arrow
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import Data.Convertible
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#endif
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{-
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pretty :: Outputable a => a -> String
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pretty = showSDocForUser neverQualify . ppr
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debug :: Outputable a => a -> b -> b
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debug x v = trace (pretty x) v
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-}
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----------------------------------------------------------------
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----------------------------------------------------------------
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--
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#if __GLASGOW_HASKELL__ >= 706
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type ClsInst = InstEnv.ClsInst
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#else
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type ClsInst = InstEnv.Instance
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#endif
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mkTarget :: TargetId -> Bool -> Maybe (SB.StringBuffer, UTCTime) -> Target
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#if __GLASGOW_HASKELL__ >= 706
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mkTarget = Target
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#else
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mkTarget tid allowObjCode = Target tid allowObjCode . (fmap . second) convert
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#endif
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----------------------------------------------------------------
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----------------------------------------------------------------
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withStyle :: DynFlags -> PprStyle -> SDoc -> Pretty.Doc
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#if __GLASGOW_HASKELL__ >= 706
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withStyle = withPprStyleDoc
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#else
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withStyle _ = withPprStyleDoc
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#endif
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setLogAction :: DynFlags
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-> (DynFlags -> Severity -> SrcSpan -> PprStyle -> SDoc -> IO ())
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-> DynFlags
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setLogAction df f =
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#if __GLASGOW_HASKELL__ >= 706
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df { log_action = f }
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#else
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df { log_action = f df }
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#endif
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----------------------------------------------------------------
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----------------------------------------------------------------
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showUnqualifiedPage :: DynFlags -> SDoc -> String
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showUnqualifiedPage dflag = Pretty.showDocWith Pretty.PageMode
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. withStyle dflag styleUnqualified
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styleUnqualified :: PprStyle
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styleUnqualified = mkUserStyle neverQualify AllTheWay
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----------------------------------------------------------------
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----------------------------------------------------------------
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supportedExtensions :: [String]
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#if __GLASGOW_HASKELL__ >= 700
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supportedExtensions = supportedLanguagesAndExtensions
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#else
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supportedExtensions = supportedLanguages
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#endif
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----------------------------------------------------------------
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----------------------------------------------------------------
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getSrcSpan :: SrcSpan -> Maybe (Int,Int,Int,Int)
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#if __GLASGOW_HASKELL__ >= 702
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getSrcSpan (RealSrcSpan spn)
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#else
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getSrcSpan spn | isGoodSrcSpan spn
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#endif
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= Just (srcSpanStartLine spn
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, srcSpanStartCol spn
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, srcSpanEndLine spn
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, srcSpanEndCol spn)
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getSrcSpan _ = Nothing
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getSrcFile :: SrcSpan -> Maybe String
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#if __GLASGOW_HASKELL__ >= 702
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getSrcFile (RealSrcSpan spn) = Just . unpackFS . srcSpanFile $ spn
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#else
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getSrcFile spn | isGoodSrcSpan spn = Just . unpackFS . srcSpanFile $ spn
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#endif
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getSrcFile _ = Nothing
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----------------------------------------------------------------
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toStringBuffer :: [String] -> Ghc StringBuffer
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#if __GLASGOW_HASKELL__ >= 702
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toStringBuffer = return . stringToStringBuffer . unlines
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#else
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toStringBuffer = liftIO . stringToStringBuffer . unlines
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#endif
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----------------------------------------------------------------
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fOptions :: [String]
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#if __GLASGOW_HASKELL__ >= 704
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fOptions = [option | (option,_,_) <- fFlags]
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++ [option | (option,_,_) <- fWarningFlags]
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++ [option | (option,_,_) <- fLangFlags]
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#elif __GLASGOW_HASKELL__ == 702
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fOptions = [option | (option,_,_,_) <- fFlags]
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#else
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fOptions = [option | (option,_,_) <- fFlags]
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#endif
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----------------------------------------------------------------
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----------------------------------------------------------------
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setCtx :: [ModSummary] -> Ghc Bool
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#if __GLASGOW_HASKELL__ >= 704
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setCtx ms = do
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#if __GLASGOW_HASKELL__ >= 706
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let modName = IIModule . moduleName . ms_mod
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#else
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let modName = IIModule . ms_mod
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#endif
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top <- map modName <$> filterM isTop ms
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setContext top
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return (not . null $ top)
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#else
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setCtx ms = do
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top <- map ms_mod <$> filterM isTop ms
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setContext top []
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return (not . null $ top)
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#endif
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where
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isTop mos = lookupMod ||> returnFalse
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where
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lookupMod = lookupModule (ms_mod_name mos) Nothing >> return True
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returnFalse = return False
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showSeverityCaption :: Severity -> String
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#if __GLASGOW_HASKELL__ >= 706
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showSeverityCaption SevWarning = "Warning: "
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showSeverityCaption _ = ""
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#else
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showSeverityCaption = const ""
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#endif
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----------------------------------------------------------------
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----------------------------------------------------------------
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setCabalPkg :: DynFlags -> DynFlags
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#if __GLASGOW_HASKELL__ >= 707
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setCabalPkg dflag = gopt_set dflag Opt_BuildingCabalPackage
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#else
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setCabalPkg dflag = dopt_set dflag Opt_BuildingCabalPackage
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#endif
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----------------------------------------------------------------
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addDevPkgs :: DynFlags -> [Package] -> DynFlags
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addDevPkgs df pkgs = df''
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where
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#if __GLASGOW_HASKELL__ >= 707
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df' = gopt_set df Opt_HideAllPackages
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#else
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df' = dopt_set df Opt_HideAllPackages
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#endif
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df'' = df' {
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packageFlags = map ExposePackage pkgs ++ packageFlags df
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}
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----------------------------------------------------------------
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----------------------------------------------------------------
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class HasType a where
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getType :: GhcMonad m => TypecheckedModule -> a -> m (Maybe (SrcSpan, Type))
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instance HasType (LHsBind Id) where
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#if __GLASGOW_HASKELL__ >= 707
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getType _ (L spn FunBind{fun_matches = MG _ in_tys out_typ}) = return $ Just (spn, typ)
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where typ = mkFunTys in_tys out_typ
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#else
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getType _ (L spn FunBind{fun_matches = MatchGroup _ typ}) = return $ Just (spn, typ)
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#endif
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getType _ _ = return Nothing
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----------------------------------------------------------------
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----------------------------------------------------------------
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-- from ghc/InteractiveUI.hs
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filterOutChildren :: (a -> TyThing) -> [a] -> [a]
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filterOutChildren get_thing xs
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= [x | x <- xs, not (getName (get_thing x) `elemNameSet` implicits)]
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where
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implicits = mkNameSet [getName t | x <- xs, t <- implicitTyThings (get_thing x)]
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infoThing :: String -> Ghc String
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infoThing str = do
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names <- parseName str
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#if __GLASGOW_HASKELL__ >= 707
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mb_stuffs <- mapM (getInfo False) names
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let filtered = filterOutChildren (\(t,_f,_i,_fam) -> t) (catMaybes mb_stuffs)
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#else
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mb_stuffs <- mapM getInfo names
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let filtered = filterOutChildren (\(t,_f,_i) -> t) (catMaybes mb_stuffs)
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#endif
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dflag <- getSessionDynFlags
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return $ showUnqualifiedPage dflag $ vcat (intersperse (text "") $ map (pprInfo False) filtered)
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#if __GLASGOW_HASKELL__ >= 707
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pprInfo :: PrintExplicitForalls -> (TyThing, GHC.Fixity, [ClsInst], [FamInst]) -> SDoc
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pprInfo pefas (thing, fixity, insts, famInsts)
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= pprTyThingInContextLoc pefas thing
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$$ show_fixity fixity
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$$ InstEnv.pprInstances insts
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$$ pprFamInsts famInsts
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where
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show_fixity fx
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| fx == defaultFixity = Outputable.empty
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| otherwise = ppr fx <+> ppr (getName thing)
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#else
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pprInfo :: PrintExplicitForalls -> (TyThing, GHC.Fixity, [ClsInst]) -> SDoc
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pprInfo pefas (thing, fixity, insts)
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= pprTyThingInContextLoc pefas thing
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$$ show_fixity fixity
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$$ vcat (map pprInstance insts)
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where
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show_fixity fx
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| fx == defaultFixity = Outputable.empty
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| otherwise = ppr fx <+> ppr (getName thing)
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#endif
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