Work on evaluation

src/Evaluator/EvaluationException.hpp

@@ -0,0 +1,22 @@
+
+#ifndef PORYGONLANG_EVALUATIONEXCEPTION_HPP
+#define PORYGONLANG_EVALUATIONEXCEPTION_HPP
+#include <exception>
+#include <string>
+using namespace std;
+
+class EvaluationException : std::exception {
+    string _message;
+public:
+    explicit EvaluationException(string message){
+        _message = message;
+    }
+
+    const string defaultErrorText = "An evaluation exception occurred: ";
+    const char* what() const noexcept final{
+        return (defaultErrorText + _message).c_str();
+    }
+};
+
+
+#endif //PORYGONLANG_EVALUATIONEXCEPTION_HPP