diff --git a/core/src/main/java/jef/expressions/BinaryExpression.java b/core/src/main/java/jef/expressions/BinaryExpression.java
index 89f28ce..0d24508 100644
--- a/core/src/main/java/jef/expressions/BinaryExpression.java
+++ b/core/src/main/java/jef/expressions/BinaryExpression.java
@@ -25,6 +25,7 @@ public class BinaryExpression implements Expression {
             case EQ, NE, IS -> Priority.EQUALITY;
             case LT, LE, GT, GE -> Priority.RELATIONAL;
             case IN -> Priority.RELATIONAL; //or equality?
+            //TODO +-, */, %, ...
             default -> throw new IllegalStateException();
         };
     }