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The C and C++ Include Header Files

cat -n /usr/include/c++/15/set

     1	// <set> -*- 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	 *
    27	 * Copyright (c) 1994
    28	 * Hewlett-Packard Company
    29	 *
    30	 * Permission to use, copy, modify, distribute and sell this software
    31	 * and its documentation for any purpose is hereby granted without fee,
    32	 * provided that the above copyright notice appear in all copies and
    33	 * that both that copyright notice and this permission notice appear
    34	 * in supporting documentation.  Hewlett-Packard Company makes no
    35	 * representations about the suitability of this software for any
    36	 * purpose.  It is provided "as is" without express or implied warranty.
    37	 *
    38	 *
    39	 * Copyright (c) 1996,1997
    40	 * Silicon Graphics Computer Systems, Inc.
    41	 *
    42	 * Permission to use, copy, modify, distribute and sell this software
    43	 * and its documentation for any purpose is hereby granted without fee,
    44	 * provided that the above copyright notice appear in all copies and
    45	 * that both that copyright notice and this permission notice appear
    46	 * in supporting documentation.  Silicon Graphics makes no
    47	 * representations about the suitability of this software for any
    48	 * purpose.  It is provided "as is" without express or implied warranty.
    49	 */
    50	
    51	/** @file include/set
    52	 *  This is a Standard C++ Library header.
    53	 */
    54	
    55	#ifndef _GLIBCXX_SET
    56	#define _GLIBCXX_SET 1
    57	
    58	#ifdef _GLIBCXX_SYSHDR
    59	#pragma GCC system_header
    60	#endif
    61	
    62	#include <bits/requires_hosted.h> // containers
    63	
    64	#include <bits/stl_tree.h>
    65	#include <bits/stl_set.h>
    66	#include <bits/stl_multiset.h>
    67	#include <bits/range_access.h>
    68	#include <bits/erase_if.h>
    69	
    70	#ifdef _GLIBCXX_DEBUG
    71	# include <debug/set>
    72	#endif
    73	
    74	#define __glibcxx_want_allocator_traits_is_always_equal
    75	#define __glibcxx_want_containers_ranges
    76	#define __glibcxx_want_erase_if
    77	#define __glibcxx_want_generic_associative_lookup
    78	#define __glibcxx_want_node_extract
    79	#define __glibcxx_want_nonmember_container_access
    80	#include <bits/version.h>
    81	
    82	#if __cplusplus >= 201703L
    83	#include <bits/memory_resource.h>
    84	namespace std _GLIBCXX_VISIBILITY(default)
    85	{
    86	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    87	  namespace pmr
    88	  {
    89	    template<typename _Key, typename _Cmp = std::less<_Key>>
    90	      using set = std::set<_Key, _Cmp, polymorphic_allocator<_Key>>;
    91	    template<typename _Key, typename _Cmp = std::less<_Key>>
    92	      using multiset = std::multiset<_Key, _Cmp, polymorphic_allocator<_Key>>;
    93	  } // namespace pmr
    94	_GLIBCXX_END_NAMESPACE_VERSION
    95	} // namespace std
    96	#endif // C++17
    97	
    98	#if __cplusplus > 201703L
    99	namespace std _GLIBCXX_VISIBILITY(default)
   100	{
   101	_GLIBCXX_BEGIN_NAMESPACE_VERSION
   102	  template<typename _Key, typename _Compare, typename _Alloc,
   103		   typename _Predicate>
   104	    inline typename set<_Key, _Compare, _Alloc>::size_type
   105	    erase_if(set<_Key, _Compare, _Alloc>& __cont, _Predicate __pred)
   106	    {
   107	      _GLIBCXX_STD_C::set<_Key, _Compare, _Alloc>& __ucont = __cont;
   108	      return __detail::__erase_nodes_if(__cont, __ucont, __pred);
   109	    }
   110	
   111	  template<typename _Key, typename _Compare, typename _Alloc,
   112		   typename _Predicate>
   113	    inline typename multiset<_Key, _Compare, _Alloc>::size_type
   114	    erase_if(multiset<_Key, _Compare, _Alloc>& __cont, _Predicate __pred)
   115	    {
   116	      _GLIBCXX_STD_C::multiset<_Key, _Compare, _Alloc>& __ucont = __cont;
   117	      return __detail::__erase_nodes_if(__cont, __ucont, __pred);
   118	    }
   119	_GLIBCXX_END_NAMESPACE_VERSION
   120	} // namespace std
   121	#endif // C++20
   122	
   123	#endif /* _GLIBCXX_SET */