The C and C++ Include Header Files

/usr/include/c++/11/experimental/bits/lfts_config.h


$ cat -n /usr/include/c++/11/experimental/bits/lfts_config.h

     1	// Namespace declarations for Library Fundamentals TS -*- C++ -*-
     2	
     3	// Copyright (C) 2016-2021 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 experimental/bits/lfts_config.h
    26	 *  This is an internal header file, included by other library headers.
    27	 *  Do not attempt to use it directly.
    28	 */
    29	
    30	#if __cplusplus >= 201402L
    31	#include <bits/c++config.h>
    32	
    33	  /** @defgroup libfund-ts Library Fundamentals TS
    34	   *  @ingroup experimental
    35	   *
    36	   * Components defined by the _C++ Extensions for Library Fundamentals_
    37	   * Technical Specification, versions 1 and 2.
    38	   *
    39	   * - ISO/IEC TS 19568:2015 C++ Extensions for Library Fundamentals
    40	   * - ISO/IEC TS 19568:2017 C++ Extensions for Library Fundamentals, Version 2
    41	   */
    42	
    43	#if _GLIBCXX_INLINE_VERSION
    44	namespace std _GLIBCXX_VISIBILITY(default)
    45	{
    46	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    47	
    48	namespace chrono
    49	{
    50	namespace experimental
    51	{
    52	inline namespace fundamentals_v1 { }
    53	inline namespace fundamentals_v2 { }
    54	} // namespace experimental
    55	} // namespace chrono
    56	
    57	namespace experimental
    58	{
    59	inline namespace fundamentals_v1 { }
    60	inline namespace fundamentals_v2 { }
    61	inline namespace literals { inline namespace string_view_literals { } }
    62	} // namespace experimental
    63	
    64	_GLIBCXX_END_NAMESPACE_VERSION
    65	} // namespace std
    66	#endif
    67	#endif