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The C and C++ Include Header Files

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

     1	// <memory> Forward declarations -*- C++ -*-
     2	
     3	// Copyright (C) 2001-2025 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	/*
    26	 * Copyright (c) 1996-1997
    27	 * Silicon Graphics Computer Systems, Inc.
    28	 *
    29	 * Permission to use, copy, modify, distribute and sell this software
    30	 * and its documentation for any purpose is hereby granted without fee,
    31	 * provided that the above copyright notice appear in all copies and
    32	 * that both that copyright notice and this permission notice appear
    33	 * in supporting documentation.  Silicon Graphics makes no
    34	 * representations about the suitability of this software for any
    35	 * purpose.  It is provided "as is" without express or implied warranty.
    36	 */
    37	
    38	/** @file bits/memoryfwd.h
    39	 *  This is an internal header file, included by other library headers.
    40	 *  Do not attempt to use it directly. @headername{memory}
    41	 */
    42	
    43	#ifndef _MEMORYFWD_H
    44	#define _MEMORYFWD_H 1
    45	
    46	#ifdef _GLIBCXX_SYSHDR
    47	#pragma GCC system_header
    48	#endif
    49	
    50	#include <bits/c++config.h>
    51	
    52	namespace std _GLIBCXX_VISIBILITY(default)
    53	{
    54	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    55	
    56	  /**
    57	   * @defgroup allocators Allocators
    58	   * @ingroup memory
    59	   *
    60	   * Classes encapsulating memory operations.
    61	   *
    62	   * @{
    63	   */
    64	
    65	  // Included in freestanding as a libstdc++ extension.
    66	  template<typename>
    67	    class allocator;
    68	
    69	  template<>
    70	    class allocator<void>;
    71	
    72	#if __cplusplus >= 201103L
    73	  /// Declare uses_allocator so it can be specialized in `<queue>` etc.
    74	  template<typename, typename>
    75	    struct uses_allocator;
    76	
    77	  template<typename>
    78	    struct allocator_traits;
    79	#endif
    80	
    81	  /// @} group memory
    82	
    83	_GLIBCXX_END_NAMESPACE_VERSION
    84	} // namespace std
    85	
    86	#endif