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The C and C++ Include Header Files

/usr/include/c++/11/experimental/system_error


$ cat -n /usr/include/c++/11/experimental/system_error

     1	// Variable Templates For system_error -*- C++ -*-
     2	
     3	// Copyright (C) 2014-2021 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/system_error
    26	 *  This is a TS C++ Library header.
    27	 *  @ingroup libfund-ts
    28	 */
    29	
    30	//
    31	// N3932 Variable Templates For Type Traits (Revision 1)
    32	//
    33	
    34	#ifndef _GLIBCXX_EXPERIMENTAL_SYSTEM_ERROR
    35	#define _GLIBCXX_EXPERIMENTAL_SYSTEM_ERROR 1
    36	
    37	#pragma GCC system_header
    38	
    39	#if __cplusplus >= 201402L
    40	
    41	#include <system_error>
    42	#include <experimental/bits/lfts_config.h>
    43	
    44	namespace std _GLIBCXX_VISIBILITY(default)
    45	{
    46	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    47	
    48	namespace experimental
    49	{
    50	inline namespace fundamentals_v1
    51	{
    52	// See C++14 19.5, System error support
    53	template <typename _Tp>
    54	  constexpr bool is_error_code_enum_v = is_error_code_enum<_Tp>::value;
    55	template <typename _Tp>
    56	  constexpr bool is_error_condition_enum_v =
    57	    is_error_condition_enum<_Tp>::value;
    58	} // namespace fundamentals_v1
    59	} // namespace experimental
    60	
    61	_GLIBCXX_END_NAMESPACE_VERSION
    62	} // namespace std
    63	
    64	#endif // __cplusplus <= 201103L
    65	
    66	#endif // _GLIBCXX_EXPERIMENTAL_SYSTEM_ERROR