case TyCon.tyConDataCons tycon of
-- Not an algebraic type
[] -> return $ Left $ "VHDLTools.mkTyConHType: Only custom algebraic types are supported: " ++ pprString tycon
- [dc] -> do
- let arg_tys = DataCon.dataConRepArgTys dc
- let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
- let real_arg_tys_nostate = filter (\x -> not (isStateType x)) real_arg_tys
- elem_htys_either <- mapM mkHTypeEither real_arg_tys_nostate
- case Either.partitionEithers elem_htys_either of
- ([], [elem_hty]) ->
- return $ Right elem_hty
- -- No errors in element types
- ([], elem_htys) ->
- return $ Right $ AggrType (nameToString (TyCon.tyConName tycon)) elem_htys
- -- There were errors in element types
- (errors, _) -> return $ Left $
- "\nVHDLTools.mkTyConHType: Can not construct type for: " ++ pprString tycon ++ "\n because no type can be construced for some of the arguments.\n"
- ++ (concat errors)
dcs -> do
- let arg_tys = concatMap DataCon.dataConRepArgTys dcs
- let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
- case real_arg_tys of
- [] ->
- return $ Right $ EnumType (nameToString (TyCon.tyConName tycon)) (map (nameToString . DataCon.dataConName) dcs)
- xs -> return $ Left $
- "VHDLTools.mkTyConHType: Only enum-like constructor datatypes supported: " ++ pprString dcs ++ "\n"
+ let arg_tyss = map DataCon.dataConRepArgTys dcs
+ let enum_ty = EnumType name (map (nameToString . DataCon.dataConName) dcs)
+ case (concat arg_tyss) of
+ -- No arguments, this is just an enumeration type
+ [] -> return (Right enum_ty)
+ -- At least one argument, this becomes an aggregate type
+ _ -> do
+ -- Resolve any type arguments to this type
+ let real_arg_tyss = map (map (CoreSubst.substTy subst)) arg_tyss
+ -- Remove any state type fields
+ let real_arg_tyss_nostate = map (filter (\x -> not (isStateType x))) real_arg_tyss
+ elem_htyss_either <- mapM (mapM mkHTypeEither) real_arg_tyss_nostate
+ let (errors, elem_htyss) = unzip (map Either.partitionEithers elem_htyss_either)
+ case errors of
+ [] -> case (dcs, concat elem_htyss) of
+ -- A single constructor with a single (non-state) field?
+ ([dc], [elem_hty]) -> return $ Right elem_hty
+ -- If we get here, then all of the argument types were state
+ -- types (we check for enumeration types at the top). Not
+ -- sure how to handle this, so error out for now.
+ (_, []) -> error $ "ADT with only State elements (or something like that?) Dunno how to handle this yet. Tycon: " ++ pprString tycon ++ " Arguments: " ++ pprString args
+ -- A full ADT (with multiple fields and one or multiple
+ -- constructors).
+ (_, elem_htys) -> do
+ let (_, fieldss) = List.mapAccumL (List.mapAccumL label_field) labels elem_htyss
+ -- Only put in an enumeration as part of the aggregation
+ -- when there are multiple datacons
+ let enum_ty_part = case dcs of
+ [dc] -> Nothing
+ _ -> Just ("constructor", enum_ty)
+ -- Create the AggrType HType
+ return $ Right $ AggrType name enum_ty_part fieldss
+ -- There were errors in element types
+ errors -> return $ Left $
+ "\nVHDLTools.mkTyConHType: Can not construct type for: " ++ pprString tycon ++ "\n because no type can be construced for some of the arguments.\n"
+ ++ (concat $ concat errors)
where
+ name = (nameToString (TyCon.tyConName tycon))
tyvars = TyCon.tyConTyVars tycon
subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
+ -- Label a field by taking the first available label and returning
+ -- the rest.
+ label_field :: [String] -> HType -> ([String], (String, HType))
+ label_field (l:ls) htype = (ls, (l, htype))
+ labels = map (:[]) ['A'..'Z']
--- Translate a Haskell type to a VHDL type, generating a new type if needed.
--- Returns an error value, using the given message, when no type could be
--- created. Returns Nothing when the type is valid, but empty.
vhdlTy :: (TypedThing t, Outputable.Outputable t) =>
String -> t -> TypeSession (Maybe AST.TypeMark)
vhdlTy msg ty = do
htype <- mkHType msg ty
vhdlTyMaybe htype
+-- | Translate a Haskell type to a VHDL type, generating a new type if needed.
+-- Returns an error value, using the given message, when no type could be
+-- created. Returns Nothing when the type is valid, but empty.
vhdlTyMaybe :: HType -> TypeSession (Maybe AST.TypeMark)
vhdlTyMaybe htype = do
typemap <- MonadState.get tsTypes
mkTyconTy :: HType -> TypeSession TypeMapRec
mkTyconTy htype =
case htype of
- (AggrType tycon args) -> do
- elemTysMaybe <- mapM vhdlTyMaybe args
- case Maybe.catMaybes elemTysMaybe of
- [] -> -- No non-empty members
+ (AggrType name enum_field_maybe fieldss) -> do
+ let (labelss, elem_htypess) = unzip (map unzip fieldss)
+ elemTyMaybess <- mapM (mapM vhdlTyMaybe) elem_htypess
+ let elem_tyss = map Maybe.catMaybes elemTyMaybess
+ case concat elem_tyss of
+ [] -> -- No non-empty fields
return Nothing
- elem_tys -> do
- let elems = zipWith AST.ElementDec recordlabels elem_tys
- let elem_names = concatMap prettyShow elem_tys
- let ty_id = mkVHDLExtId $ tycon ++ elem_names
- let ty_def = AST.TDR $ AST.RecordTypeDef elems
- let tupshow = mkTupleShow elem_tys ty_id
+ _ -> do
+ let reclabelss = map (map mkVHDLBasicId) labelss
+ let elemss = zipWith (zipWith AST.ElementDec) reclabelss elem_tyss
+ let elem_names = concatMap (concatMap prettyShow) elem_tyss
+ let ty_id = mkVHDLExtId $ name ++ elem_names
+ -- Find out if we need to add an extra field at the start of
+ -- the record type containing the constructor (only needed
+ -- when there's more than one constructor).
+ enum_ty_maybe <- case enum_field_maybe of
+ Nothing -> return Nothing
+ Just (_, enum_htype) -> do
+ enum_ty_maybe' <- vhdlTyMaybe enum_htype
+ case enum_ty_maybe' of
+ Nothing -> error $ "Couldn't translate enumeration type part of AggrType: " ++ show htype
+ -- Note that the first Just means the type is
+ -- translateable, while the second Just means that there
+ -- is a enum_ty at all (e.g., there's multiple
+ -- constructors).
+ Just enum_ty -> return $ Just enum_ty
+ -- Create an record field declaration for the first
+ -- constructor field, if needed.
+ enum_dec_maybe <- case enum_field_maybe of
+ Nothing -> return $ Nothing
+ Just (enum_name, enum_htype) -> do
+ enum_vhdl_ty_maybe <- vhdlTyMaybe enum_htype
+ let enum_vhdl_ty = Maybe.fromMaybe (error $ "\nVHDLTools.mkTyconTy: Enumeration field should not have empty type: " ++ show enum_htype) enum_vhdl_ty_maybe
+ return $ Just $ AST.ElementDec (mkVHDLBasicId enum_name) enum_vhdl_ty
+ -- Turn the maybe into a list, so we can prepend it.
+ let enum_decs = Maybe.maybeToList enum_dec_maybe
+ let enum_tys = Maybe.maybeToList enum_ty_maybe
+ let ty_def = AST.TDR $ AST.RecordTypeDef (enum_decs ++ concat elemss)
+ let tupshow = mkTupleShow (enum_tys ++ concat elem_tyss) ty_id
MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, tupshow)
return $ Just (ty_id, Just $ Left ty_def)
(EnumType tycon dcs) -> do
MonadState.modify tsTypeFuns $ Map.insert (htype, showIdString) (showId, enumShow)
return $ Just (ty_id, Just $ Left ty_def)
otherwise -> error $ "\nVHDLTools.mkTyconTy: Called for HType that is neiter a AggrType or EnumType: " ++ show htype
- where
- -- Generate a bunch of labels for fields of a record
- recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
-- | Create a VHDL vector type
mkVectorTy ::
let ty_def = AST.SubtypeIn signedTM (Just range)
return (Just (ty_id, Just $ Right ty_def))
--- Finds the field labels for VHDL type generated for the given Core type,
--- which must result in a record type.
-getFieldLabels :: Type.Type -> TypeSession [AST.VHDLId]
-getFieldLabels ty = do
- -- Ensure that the type is generated (but throw away it's VHDLId)
- let error_msg = "\nVHDLTools.getFieldLabels: Can not get field labels, because: " ++ pprString ty ++ "can not be generated."
- vhdlTy error_msg ty
- -- Get the types map, lookup and unpack the VHDL TypeDef
- types <- MonadState.get tsTypes
- -- Assume the type for which we want labels is really translatable
- htype <- mkHType error_msg ty
- case Map.lookup htype types of
- Nothing -> error $ "\nVHDLTools.getFieldLabels: Type not found? This should not happen!\nLooking for type: " ++ (pprString ty) ++ "\nhtype: " ++ (show htype)
- Just Nothing -> return [] -- The type is empty
- Just (Just (_, Just (Left (AST.TDR (AST.RecordTypeDef elems))))) -> return $ map (\(AST.ElementDec id _) -> id) elems
- Just (Just (_, Just vty)) -> error $ "\nVHDLTools.getFieldLabels: Type not a record type? This should not happen!\nLooking for type: " ++ pprString (ty) ++ "\nhtype: " ++ (show htype) ++ "\nFound type: " ++ (show vty)
-
+-- Finds the field labels and types for aggregation HType. Returns an
+-- error on other types.
+getFields ::
+ HType -- ^ The HType to get fields for
+ -> Int -- ^ The constructor to get fields for (e.g., 0
+ -- for the first constructor, etc.)
+ -> [(String, HType)] -- ^ A list of fields, with their name and type
+getFields htype dc_i = case htype of
+ (AggrType name _ fieldss)
+ | dc_i >= 0 && dc_i < length fieldss -> fieldss!!dc_i
+ | otherwise -> error $ "Invalid constructor index: " ++ (show dc_i) ++ ". No such constructor in HType: " ++ (show htype)
+ _ -> error $ "Can't get fields from non-aggregate HType: " ++ show htype
+
+-- Finds the field labels for an aggregation type, as VHDLIds.
+getFieldLabels ::
+ HType -- ^ The HType to get field labels for
+ -> Int -- ^ The constructor to get fields for (e.g., 0
+ -- for the first constructor, etc.)
+ -> [AST.VHDLId] -- ^ The labels
+getFieldLabels htype dc_i = ((map mkVHDLBasicId) . (map fst)) (getFields htype dc_i)
+
mktydecl :: (AST.VHDLId, Maybe (Either AST.TypeDef AST.SubtypeIn)) -> Maybe AST.PackageDecItem
mytydecl (_, Nothing) = Nothing
mktydecl (ty_id, Just (Left ty_def)) = Just $ AST.PDITD $ AST.TypeDec ty_id ty_def
projects / matthijs / master-project / cλash.git / blobdiff