X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=VHDL.hs;h=f145385e6c19f932a089d6bae4b62eb8ef0b7952;hb=0d5cf9c7743e3db5aec159993ce2280493890a19;hp=8eb130fad8e0d11e016e3222e011f55b36977e05;hpb=8a17f35807fb35ee4d2a4c35c75e1cf99066f94d;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/VHDL.hs b/VHDL.hs
index 8eb130f..f145385 100644
--- a/VHDL.hs
+++ b/VHDL.hs
@@ -29,6 +29,7 @@ import qualified OccName
 import qualified Var
 import qualified TyCon
 import qualified DataCon
+import qualified CoreSubst
 import Outputable ( showSDoc, ppr )
 
 -- Local imports
@@ -55,7 +56,7 @@ createDesignFiles binds =
     init_session = VHDLSession Map.empty Map.empty builtin_funcs globalNameTable
     (units, final_session) = 
       State.runState (createLibraryUnits binds) init_session
-    ty_decls = Map.elems (final_session ^. vsTypes)
+    ty_decls = map (uncurry AST.TypeDec) $ Map.elems (final_session ^. vsTypes)
     ieee_context = [
         AST.Library $ mkVHDLBasicId "IEEE",
         mkUseAll ["IEEE", "std_logic_1164"],
@@ -64,7 +65,7 @@ createDesignFiles binds =
     full_context =
       mkUseAll ["work", "types"]
       : ieee_context
-    type_package = AST.LUPackageDec $ AST.PackageDec (mkVHDLBasicId "types") (map (AST.PDITD . snd) ty_decls)
+    type_package = AST.LUPackageDec $ AST.PackageDec (mkVHDLBasicId "types") (map AST.PDITD ty_decls)
 
 -- Create a use foo.bar.all statement. Takes a list of components in the used
 -- name. Must contain at least two components
@@ -436,24 +437,65 @@ vhdl_ty ty = do
     Just t -> return t
     -- No type yet, try to construct it
     Nothing -> do
-      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
+        -- Create a custom type from this tycon
+        otherwise -> mk_tycon_ty tycon args
+    Nothing -> return $ Nothing
+
+-- | Create VHDL type for a custom tycon
+mk_tycon_ty :: TyCon.TyCon -> [Type.Type] -> VHDLState (Maybe (AST.TypeMark, AST.TypeDef))
+mk_tycon_ty tycon args =
+  case TyCon.tyConDataCons tycon of
+    -- Not an algebraic type
+    [] -> error $ "Only custom algebraic types are supported: " ++  (showSDoc $ ppr tycon)
+    [dc] -> do
+      let arg_tys = DataCon.dataConRepArgTys dc
+      -- TODO: CoreSubst docs say each Subs can be applied only once. Is this a
+      -- violation? Or does it only mean not to apply it again to the same
+      -- subject?
+      let real_arg_tys = map (CoreSubst.substTy subst) arg_tys
+      elem_tys <- mapM vhdl_ty real_arg_tys
+      let elems = zipWith AST.ElementDec recordlabels elem_tys
+      -- For a single construct datatype, build a record with one field for
+      -- each argument.
+      -- TODO: Add argument type ids to this, to ensure uniqueness
+      -- TODO: Special handling for tuples?
+      let ty_id = mkVHDLExtId $ nameToString (TyCon.tyConName tycon)
+      let ty_def = AST.TDR $ AST.RecordTypeDef elems
+      return $ Just (ty_id, ty_def)
+    dcs -> error $ "Only single constructor datatypes supported: " ++  (showSDoc $ ppr tycon)
+  where
+    -- Create a subst that instantiates all types passed to the tycon
+    -- TODO: I'm not 100% sure that this is the right way to do this. It seems
+    -- to work so far, though..
+    tyvars = TyCon.tyConTyVars tycon
+    subst = CoreSubst.extendTvSubstList CoreSubst.emptySubst (zip tyvars args)
 
 -- | Create a VHDL vector type
 mk_vector_ty ::
   Int -- ^ The length of the vector
   -> Type.Type -- ^ The Haskell type to create a VHDL type for
-  -> VHDLState AST.TypeMark -- The typemark created.
+  -> VHDLState (AST.TypeMark, AST.TypeDef) -- The typemark created.
 
 mk_vector_ty len ty = do
   -- Assume there is a single type argument
@@ -461,12 +503,8 @@ mk_vector_ty len ty = do
   -- TODO: Use el_ty
   let range = AST.IndexConstraint [AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len - 1))]
   let ty_def = AST.TDA $ AST.ConsArrayDef range std_logic_ty
-  let ty_dec = AST.TypeDec ty_id ty_def
-  -- TODO: Check name uniqueness
-  --State.modify (Map.insert (OrdType ty) (ty_id, ty_dec))
-  modA vsTypes (Map.insert (OrdType ty) (ty_id, ty_dec))
   modA vsTypeFuns (Map.insert (OrdType ty) (genUnconsVectorFuns std_logic_ty ty_id))
-  return ty_id
+  return (ty_id, ty_def)
 
 
 builtin_types = 
@@ -521,6 +559,10 @@ bndrToString ::
 
 bndrToString = OccName.occNameString . Name.nameOccName . Var.varName
 
+-- Extracts the string version of the name
+nameToString :: Name.Name -> String
+nameToString = OccName.occNameString . Name.nameOccName
+
 -- | A consise representation of a (set of) ports on a builtin function
 --type PortMap = HsValueMap (String, AST.TypeMark)
 -- | A consise representation of a builtin function
@@ -543,6 +585,8 @@ builtin_funcs = mkBuiltins
     BuiltIn "hwnot" [("a", VHDL.bit_ty)] ("o", VHDL.bit_ty)
   ]
 
+recordlabels = map (\c -> mkVHDLBasicId [c]) ['A'..'Z']
+
 -- | Map a port specification of a builtin function to a VHDL Signal to put in
 --   a VHDLSignalMap
 toVHDLSignalMapElement :: (String, AST.TypeMark) -> VHDLSignalMapElement