Implements indexing with period identifier style (`foo.bar`)

src/Evaluator/EvalValues/EvalValue.hpp

@@ -41,6 +41,10 @@ public:
         throw EvaluationException("Can't index this EvalValue");
     }
 
+    virtual shared_ptr<EvalValue> IndexValue(uint32_t hash){
+        throw EvaluationException("Can't index this EvalValue");
+    }
+
     virtual void SetIndexValue(EvalValue *key, shared_ptr<EvalValue> value){
         throw EvaluationException("Can't index this EvalValue");
     }