public:
StopRequest() = default;
explicit StopRequest(std::string msg) : msg_(std::string("Actor killed (") + msg + std::string(").")) {}
- virtual const char* what() const noexcept { return msg_.c_str(); }
+ const char* what() const noexcept { return msg_.c_str(); }
private:
std::string msg_ = std::string("Actor killed.");