module Language.Haskell.TH.TypeGraph.TypeInfo
(
TypeInfo, startTypes, fields, infoMap, synonyms, typeSet
, makeTypeInfo
, typeVertex
, typeVertex'
, fieldVertex
, fieldVertices
, allVertices
) where
#if __GLASGOW_HASKELL__ < 709
import Data.Monoid (mempty)
#endif
import Control.Lens
import Control.Monad.Readers (ask, MonadReaders)
import Control.Monad.Trans as Monad
import Control.Monad.States (execStateT, MonadStates(get, put), StateT)
import Data.Foldable as Foldable (mapM_)
import Data.List as List (intercalate, map)
import Data.Map as Map (findWithDefault, insert, insertWith, Map, toList)
import Data.Set.Extra as Set (empty, insert, map, mapM_, member, Set, singleton, toList, union)
import Language.Haskell.Exts.Syntax ()
import Language.Haskell.TH
import Language.Haskell.TH.Desugar as DS (DsMonad)
import Language.Haskell.TH.Instances ()
import Language.Haskell.TH.PprLib (ptext)
import Language.Haskell.TH.Syntax as TH (Lift(lift), Quasi(..))
import Language.Haskell.TH.TypeGraph.Expand (E(E), ExpandMap, expandType)
import Language.Haskell.TH.TypeGraph.Prelude (pprint')
import Language.Haskell.TH.TypeGraph.Shape (Field)
import Language.Haskell.TH.TypeGraph.Vertex (TGV(..), TGVSimple(..), etype)
data TypeInfo
= TypeInfo
{ _startTypes :: [Type]
, _typeSet :: Set Type
, _infoMap :: Map Name Info
, _expanded :: Map Type (E Type)
, _synonyms :: Map (E Type) (Set Name)
, _fields :: Map (E Type) (Set (Name, Name, Either Int Name))
} deriving (Show, Eq, Ord)
instance Ppr TypeInfo where
ppr (TypeInfo {_typeSet = t, _infoMap = i, _expanded = e, _synonyms = s, _fields = f}) =
ptext $ intercalate "\n " ["TypeInfo:", ppt, ppi, ppe, pps, ppf] ++ "\n"
where
ppt = intercalate "\n " ("typeSet:" : concatMap (lines . pprint) (Set.toList t))
ppi = intercalate "\n " ("infoMap:" : concatMap (lines . (\ (name, info) -> show name ++ " -> " ++ pprint info)) (Map.toList i))
ppe = intercalate "\n " ("expanded:" : concatMap (lines . (\ (typ, (E etyp)) -> pprint typ ++ " -> " ++ pprint etyp)) (Map.toList e))
pps = intercalate "\n " ("synonyms:" : concatMap (lines . (\ (typ, ns) -> pprint typ ++ " -> " ++ show ns)) (Map.toList s))
ppf = intercalate "\n " ("fields:" : concatMap (lines . (\ (typ, fs) -> pprint typ ++ " -> " ++ show fs)) (Map.toList f))
$(makeLenses ''TypeInfo)
instance Monad m => MonadStates ExpandMap (StateT TypeInfo m) where
get = use expanded
put x = expanded .= x
instance Lift TypeInfo where
lift (TypeInfo {_startTypes = st, _typeSet = t, _infoMap = i, _expanded = e, _synonyms = s, _fields = f}) =
[| TypeInfo { _startTypes = $(TH.lift st)
, _typeSet = $(TH.lift t)
, _infoMap = $(TH.lift i)
, _expanded = $(TH.lift e)
, _synonyms = $(TH.lift s)
, _fields = $(TH.lift f)
} |]
collectTypeInfo :: forall m. DsMonad m => (Type -> m (Set Type)) -> Type -> StateT TypeInfo m ()
collectTypeInfo extraTypes typ0 = do
doType typ0
where
doType :: Type -> StateT TypeInfo m ()
doType typ = Monad.lift (extraTypes typ) >>= Set.mapM_ doType' . Set.insert typ
doType' :: Type -> StateT TypeInfo m ()
doType' typ = do
(s :: Set Type) <- use typeSet
case Set.member typ s of
True -> return ()
False -> do typeSet %= Set.insert typ
etyp <- expandType typ
expanded %= Map.insert typ etyp
doType'' typ
doType'' :: Type -> StateT TypeInfo m ()
doType'' (ConT name) = do
info <- qReify name
infoMap %= Map.insert name info
doInfo name info
doType'' (AppT typ1 typ2) = doType typ1 >> doType typ2
doType'' ListT = return ()
doType'' (VarT _) = return ()
doType'' (TupleT _) = return ()
doType'' typ = error $ "makeTypeInfo: " ++ pprint' typ
doInfo :: Name -> Info -> StateT TypeInfo m ()
doInfo _tname (TyConI dec) = doDec dec
doInfo _tname (PrimTyConI _ _ _) = return ()
doInfo _tname (FamilyI _ _) = return ()
doInfo _ info = error $ "makeTypeInfo: " ++ show info
doDec :: Dec -> StateT TypeInfo m ()
doDec (TySynD tname _ typ) = do
etyp <- expandType (ConT tname)
synonyms %= Map.insertWith union etyp (singleton tname)
doType typ
doDec (NewtypeD _ tname _ constr _) = doCon tname constr
doDec (DataD _ tname _ constrs _) = Foldable.mapM_ (doCon tname) constrs
doDec dec = error $ "makeTypeInfo: " ++ pprint' dec
doCon :: Name -> Con -> StateT TypeInfo m ()
doCon tname (ForallC _ _ con) = doCon tname con
doCon tname (NormalC cname flds) = Foldable.mapM_ doField (zip (List.map (\n -> (tname, cname, Left n)) ([1..] :: [Int])) (List.map snd flds))
doCon tname (RecC cname flds) = Foldable.mapM_ doField (List.map (\ (fname, _, ftype) -> ((tname, cname, Right fname), ftype)) flds)
doCon tname (InfixC (_, lhs) cname (_, rhs)) = Foldable.mapM_ doField [((tname, cname, Left 1), lhs), ((tname, cname, Left 2), rhs)]
doField :: ((Name, Name, Either Int Name), Type) -> StateT TypeInfo m ()
doField (fld, ftyp) = do
etyp <- expandType ftyp
fields %= Map.insertWith union etyp (singleton fld)
doType ftyp
makeTypeInfo :: forall m. DsMonad m => (Type -> m (Set Type)) -> [Type] -> m TypeInfo
makeTypeInfo extraTypes types =
execStateT
(Foldable.mapM_ (collectTypeInfo extraTypes) types)
(TypeInfo { _startTypes = types
, _typeSet = mempty
, _infoMap = mempty
, _expanded = mempty
, _synonyms = mempty
, _fields = mempty})
allVertices :: (Functor m, DsMonad m, MonadReaders TypeInfo m) => Maybe Field -> E Type -> m (Set TGV)
allVertices (Just fld) etyp = singleton <$> fieldVertex fld etyp
allVertices Nothing etyp = do
v <- typeVertex etyp
vs <- fieldVertices v
return $ Set.insert (TGV {_vsimple = v, _field = Nothing}) vs
fieldVertices :: MonadReaders TypeInfo m => TGVSimple -> m (Set TGV)
fieldVertices v = do
fm <- view fields <$> ask
let fs = Map.findWithDefault Set.empty (view etype v) fm
return $ Set.map (\fld' -> TGV {_vsimple = v, _field = Just fld'}) fs
typeVertex :: MonadReaders TypeInfo m => E Type -> m TGVSimple
typeVertex etyp = do
sm <- view synonyms <$> ask
return $ TGVSimple {_syns = Map.findWithDefault Set.empty etyp sm, _etype = etyp}
typeVertex' :: MonadReaders TypeInfo m => E Type -> m TGV
typeVertex' etyp = do
v <- typeVertex etyp
return $ TGV {_vsimple = v, _field = Nothing}
fieldVertex :: MonadReaders TypeInfo m => Field -> E Type -> m TGV
fieldVertex fld' etyp = typeVertex etyp >>= \v -> return $ TGV {_vsimple = v, _field = Just fld'}