Added default functions, isEmpty does not typecheck...

[cc1516.git] / AST.dcl

diff --git a/AST.dcl b/AST.dcl
index 4f65b0e..1592143 100644 (file)
--- a/AST.dcl
+++ b/AST.dcl
@@ -42,6 +42,10 @@ from StdOverloaded import class toString, class ==, class zero, class <
 instance toString Pos
 instance toString Type
 instance toString AST
+instance toString FieldSelector
+instance toString Op2
+instance toString Expr
+instance toString VarDecl
 
 instance zero Pos
 instance == Op1