Check type of this value in interpreter

1 files changed, 4 insertions, 1 deletions

diff --git a/src/main/java/org/zwobble/couscous/interpreter/Evaluator.java b/src/main/java/org/zwobble/couscous/interpreter/Evaluator.java
index 2122f01..548f731 100644
--- a/src/main/java/org/zwobble/couscous/interpreter/Evaluator.java
+++ b/src/main/java/org/zwobble/couscous/interpreter/Evaluator.java
@@ -46,7 +46,10 @@ public class Evaluator implements ExpressionNodeMapper<InterpreterValue> {
     
     @Override
     public InterpreterValue visit(ThisReferenceNode reference) {
-        return environment.getThis().get();
+        InterpreterValue thisValue = environment.getThis().get();
+        // TODO: add a test for this
+        InterpreterTypes.checkIsInstance(reference.getType(), thisValue);
+        return thisValue;
     }
     
     @Override