--- a/ast/Exp.d	Fri Apr 18 12:24:14 2008 +0200
+++ b/ast/Exp.d	Fri Apr 18 12:50:54 2008 +0200
@@ -55,10 +55,11 @@
 
 class BinaryExp : Exp
 {
-    public enum Operator : char
+    public enum Operator
     {
-        Mul = '*', Div = '/',
-        Add = '+', Sub = '-'
+        Eq, Ne,
+        Mul, Div,
+        Add, Sub,
     }
 
     this(Operator op, Exp left, Exp right)
@@ -69,6 +70,13 @@
         this.right = right;
     }
 
+    char[] resultType()
+    {
+        if (op >= Operator.Eq && op <= Operator.Ne)
+            return "bool";
+        return null;
+    }
+
     Operator op;
     Exp left, right;
 }