X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=AST.dcl;h=4f65b0eed3f0868fe52326df8ad8ee2c23b594d8;hb=1f01e39fb2383aa2c63234d0750c0459fe3de752;hp=bf6f54fed0e2359521c0acb80bb833fc6655860c;hpb=e34b5f088ff9a86da61afbbe91c2c88f895673c7;p=cc1516.git

diff --git a/AST.dcl b/AST.dcl
index bf6f54f..4f65b0e 100644
--- a/AST.dcl
+++ b/AST.dcl
@@ -1,15 +1,16 @@
 definition module AST
 
 from Data.Maybe import :: Maybe
-from StdOverloaded import class toString, class ==
+from StdOverloaded import class toString, class ==, class zero, class <
 
 :: Pos = {line :: Int, col :: Int}
 :: AST = AST [FunDecl]
 :: VarDecl = VarDecl Pos (Maybe Type) String Expr
+:: TVar :== String
 :: Type 
 	= TupleType (Type, Type)
 	| ListType Type
-	| IdType String 
+	| IdType TVar 
 	| IntType 
 	| BoolType
 	| CharType
@@ -38,9 +39,13 @@ from StdOverloaded import class toString, class ==
 	| FunStmt String [Expr]
 	| ReturnStmt (Maybe Expr)
 
-instance toString AST
-instance toString Type
 instance toString Pos
-instance toString Op2
+instance toString Type
+instance toString AST
+
+instance zero Pos
+instance == Op1
 instance == Op2
-instance toString FieldSelector
+instance < Op1
+instance < Op2
+instance == Type