upd: add except

include/Evalvisitor.h

@@ -4,6 +4,8 @@
 
 #include "Python3ParserBaseVisitor.h"
 #include "int2048/int2048.h"
+#include <exception>
+#include <stdexcept>
 
 class EvalVisitor : public Python3ParserBaseVisitor
 {
@@ -44,5 +46,34 @@ class EvalVisitor : public Python3ParserBaseVisitor
   std::any visitArglist(Python3Parser::ArglistContext *ctx) override;
   std::any visitArgument(Python3Parser::ArgumentContext *ctx) override;
 };
+class InterpretException : public std::exception
+{
+public:
+  InterpretException() {}
+  InterpretException(const char *message) : m_message(message) {}
 
+  const char *what() const noexcept override
+  {
+    return m_message;
+  }
+
+  ~InterpretException() noexcept override {}
+
+private:
+  const char *m_message;
+};
+
+class FatalError : public std::exception
+{
+public:
+  FatalError(const char *message) : m_message(message) {}
+
+  const char *what() const noexcept override
+  {
+    return m_message;
+  }
+
+private:
+  const char *m_message;
+};
 #endif // PYTHON_INTERPRETER_EVALVISITOR_H