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The C and C++ Include Header Files

cat -n /usr/include/c++/15/bits/elements_of.h

     1	// Tag type for yielding ranges rather than values in <generator>  -*- C++ -*-
     2	
     3	// Copyright (C) 2023-2025 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	#ifndef _GLIBCXX_BITS_ELEMENTS_OF
    26	#define _GLIBCXX_BITS_ELEMENTS_OF
    27	
    28	#ifdef _GLIBCXX_SYSHDR
    29	#pragma GCC system_header
    30	#endif
    31	
    32	#include <bits/c++config.h>
    33	
    34	#include <bits/version.h>
    35	
    36	// C++ >= 23 && __glibcxx_coroutine
    37	#if defined(__glibcxx_ranges) && defined(__glibcxx_generator)
    38	#include <bits/ranges_base.h>
    39	#include <bits/memoryfwd.h>
    40	
    41	#if _GLIBCXX_HOSTED
    42	# include <bits/allocator.h> // likely desirable if hosted.
    43	#endif  // HOSTED
    44	
    45	namespace std _GLIBCXX_VISIBILITY(default)
    46	{
    47	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    48	namespace ranges
    49	{
    50	
    51	  /**
    52	   * @ingroup ranges
    53	   * @since C++23
    54	   * @{
    55	   */
    56	
    57	  template<range _Range, typename _Alloc = allocator<byte>>
    58	    struct elements_of
    59	    {
    60	      [[no_unique_address]] _Range range;
    61	      [[no_unique_address]] _Alloc allocator = _Alloc();
    62	    };
    63	
    64	  template<typename _Range, typename _Alloc = allocator<byte>>
    65	    elements_of(_Range&&, _Alloc = _Alloc())
    66	      -> elements_of<_Range&&, _Alloc>;
    67	
    68	  /// @}
    69	}
    70	_GLIBCXX_END_NAMESPACE_VERSION
    71	} // namespace std
    72	
    73	#endif  // __glibcxx_generator && __glibcxx_ranges
    74	#endif  // _GLIBCXX_BITS_ELEMENTS_OF