- File(std::string fullpath, void* userdata);
- File(std::string fullpath, sg_host_t host, void* userdata);
+ File(const std::string& fullpath, void* userdata);
+ File(const std::string& fullpath, sg_host_t host, void* userdata);
+ File(const File&) = delete;
+ File& operator=(const File&) = delete;