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The C and C++ Include Header Files

/usr/include/c++/13/filesystem


$ cat -n /usr/include/c++/13/filesystem

     1	// <filesystem> -*- C++ -*-
     2	
     3	// Copyright (C) 2014-2023 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the
     7	// terms of the GNU General Public License as published by the
     8	// Free Software Foundation; either version 3, or (at your option)
     9	// any later version.
    10	
    11	// This library is distributed in the hope that it will be useful,
    12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14	// GNU General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	/** @file include/filesystem
    26	 *  This is a Standard C++ Library header.
    27	 *  @ingroup filesystem
    28	 */
    29	
    30	#ifndef _GLIBCXX_FILESYSTEM
    31	#define _GLIBCXX_FILESYSTEM 1
    32	
    33	#pragma GCC system_header
    34	
    35	#include <bits/requires_hosted.h>
    36	
    37	#if __cplusplus >= 201703L
    38	
    39	/**
    40	 * @defgroup filesystem File System
    41	 *
    42	 * Utilities for performing operations on file systems and their components,
    43	 * such as paths, regular files, and directories.
    44	 *
    45	 * @since C++17
    46	 */
    47	
    48	#include <bits/fs_fwd.h>
    49	#include <bits/fs_path.h>
    50	#include <bits/fs_dir.h>
    51	#include <bits/fs_ops.h>
    52	
    53	#define __cpp_lib_filesystem 201703L
    54	
    55	#endif // C++17
    56	
    57	#endif // _GLIBCXX_FILESYSTEM