Where Online Learning is simpler!

The C and C++ Include Header Files

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

     1	// <map> -*- 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/map
    52	 *  This is a Standard C++ Library header.
    53	 */
    54	
    55	#ifndef _GLIBCXX_MAP
    56	#define _GLIBCXX_MAP 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_map.h>
    66	#include <bits/stl_multimap.h>
    67	#include <bits/range_access.h>
    68	#include <bits/erase_if.h>
    69	
    70	#ifdef _GLIBCXX_DEBUG
    71	# include <debug/map>
    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_map_try_emplace
    79	#define __glibcxx_want_node_extract
    80	#define __glibcxx_want_nonmember_container_access
    81	#define __glibcxx_want_tuple_like
    82	#include <bits/version.h>
    83	
    84	#if __cplusplus >= 201703L
    85	#include <bits/memory_resource.h>
    86	namespace std _GLIBCXX_VISIBILITY(default)
    87	{
    88	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    89	  namespace pmr
    90	  {
    91	    template<typename _Key, typename _Tp, typename _Cmp = std::less<_Key>>
    92	      using map
    93		= std::map<_Key, _Tp, _Cmp,
    94			   polymorphic_allocator<pair<const _Key, _Tp>>>;
    95	    template<typename _Key, typename _Tp, typename _Cmp = std::less<_Key>>
    96	      using multimap
    97		= std::multimap<_Key, _Tp, _Cmp,
    98				polymorphic_allocator<pair<const _Key, _Tp>>>;
    99	  } // namespace pmr
   100	_GLIBCXX_END_NAMESPACE_VERSION
   101	} // namespace std
   102	#endif // C++17
   103	
   104	#if __cplusplus > 201703L
   105	namespace std _GLIBCXX_VISIBILITY(default)
   106	{
   107	_GLIBCXX_BEGIN_NAMESPACE_VERSION
   108	  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc,
   109		   typename _Predicate>
   110	    inline typename map<_Key, _Tp, _Compare, _Alloc>::size_type
   111	    erase_if(map<_Key, _Tp, _Compare, _Alloc>& __cont, _Predicate __pred)
   112	    {
   113	      _GLIBCXX_STD_C::map<_Key, _Tp, _Compare, _Alloc>& __ucont = __cont;
   114	      return __detail::__erase_nodes_if(__cont, __ucont, __pred);
   115	    }
   116	
   117	  template<typename _Key, typename _Tp, typename _Compare, typename _Alloc,
   118		   typename _Predicate>
   119	    inline typename multimap<_Key, _Tp, _Compare, _Alloc>::size_type
   120	    erase_if(multimap<_Key, _Tp, _Compare, _Alloc>& __cont, _Predicate __pred)
   121	    {
   122	      _GLIBCXX_STD_C::multimap<_Key, _Tp, _Compare, _Alloc>& __ucont = __cont;
   123	      return __detail::__erase_nodes_if(__cont, __ucont, __pred);
   124	    }
   125	_GLIBCXX_END_NAMESPACE_VERSION
   126	} // namespace std
   127	#endif // C++20
   128	
   129	#endif /* _GLIBCXX_MAP */