- let new_ty = do
- -- Use the Maybe Monad for failing when one of these fails
- (tycon, args) <- Type.splitTyConApp_maybe ty
- let name = Name.getOccString (TyCon.tyConName tycon)
- case name of
- "TFVec" -> Just $ mk_vector_ty (tfvec_len ty) ty
- "SizedWord" -> Just $ mk_vector_ty (sized_word_len ty) ty
- otherwise -> Nothing
- -- Return new_ty when a new type was successfully created
- Maybe.fromMaybe
- (error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty))
- new_ty
+ newty_maybe <- (construct_vhdl_ty ty)
+ case newty_maybe of
+ Just (ty_id, ty_def) -> do
+ -- TODO: Check name uniqueness
+ modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_def))
+ return ty_id
+ Nothing -> error $ "Unsupported Haskell type: " ++ (showSDoc $ ppr ty)
+
+-- Construct a new VHDL type for the given Haskell type.
+construct_vhdl_ty :: Type.Type -> VHDLState (Maybe (AST.TypeMark, AST.TypeDef))
+construct_vhdl_ty ty = do
+ case Type.splitTyConApp_maybe ty of
+ Just (tycon, args) -> do
+ let name = Name.getOccString (TyCon.tyConName tycon)
+ case name of
+ "TFVec" -> do
+ res <- mk_vector_ty (tfvec_len ty) ty
+ return $ Just res
+ "SizedWord" -> do
+ res <- mk_vector_ty (sized_word_len ty) ty
+ return $ Just res
+ otherwise -> return Nothing
+ Nothing -> return $ Nothing