- ファイルのネイティブハンドルを取得できるよう、[`std::basic_filebuf`](/reference/fstream/basic_filebuf.md)、[`std::basic_ifstream`](/reference/fstream/basic_ifstream.md)、[`std::basic_ofstream`](/reference/fstream/basic_ofstream.md)、[`std::basic_fstream`](/reference/fstream/basic...