Initial work on standard library

src/Evaluator/EvaluationException.hpp

@@ -11,14 +11,14 @@ namespace Porygon::Evaluation {
     class EvaluationException : public std::exception {
         string _message;
     public:
-        explicit EvaluationException(string message) {
-            _message = std::move(message);
+        explicit EvaluationException(const string& message) {
+            _message = defaultErrorText +message;
         }
 
         const string defaultErrorText = "An evaluation exception occurred: ";
 
         const char *what() const noexcept final {
-            return (defaultErrorText + _message).c_str();
+            return _message.c_str();
         }
     };
 }