Hack to allow binary operators on userdata

Upsilon/Binder/BoundBinaryOperator.cs

@@ -41,8 +41,7 @@ namespace Upsilon.Binder
             OutType = outType;
         }
 
-        private static readonly BoundBinaryOperator[] Operators = new[]
-        {
+        private static readonly BoundBinaryOperator[] Operators = {
             // Math operators
             new BoundBinaryOperator(OperatorKind.Addition, Type.Number),
             new BoundBinaryOperator(OperatorKind.Subtraction, Type.Number),
@@ -97,6 +96,8 @@ namespace Upsilon.Binder
 
         public static BoundBinaryOperator Bind(SyntaxKind operatorToken, Type left, Type right)
         {
+            if (left == Type.UserData) left = Type.Unknown;
+            if (right == Type.UserData) right = Type.Unknown;
             OperatorKind kind;
             switch (operatorToken)
             {