Implements basic numerical tables

src/Evaluator/EvalValues/EvalValue.hpp

@@ -35,7 +35,9 @@ public:
         throw EvaluationException("Can't evaluate this EvalValue as string.");
     }
 
-    virtual EvalValue* IndexValue(EvalValue* val){
+    virtual std::size_t GetHashCode() = 0;
+
+    virtual shared_ptr<EvalValue> IndexValue(EvalValue* val){
         throw EvaluationException("Can't index this EvalValue");
     }
 };
@@ -66,6 +68,10 @@ public:
             return false;
         return this->EvaluateBool() == b->EvaluateBool();
     };
+
+    std::size_t GetHashCode() final{
+        return _value;
+    }
 };
 
 #endif //PORYGONLANG_EVALVALUE_HPP