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The C and C++ Include Header Files

/usr/include/c++/11/experimental/unordered_map

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

     1	// <experimental/unordered_map> -*- C++ -*-
     2	
     3	// Copyright (C) 2015-2021 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/unordered_map
    26	 *  This is a TS C++ Library header.
    27	 *  @ingroup libfund-ts
    28	 */
    29	
    30	#ifndef _GLIBCXX_EXPERIMENTAL_UNORDERED_MAP
    31	#define _GLIBCXX_EXPERIMENTAL_UNORDERED_MAP 1
    32	
    33	#pragma GCC system_header
    34	
    35	#if __cplusplus >= 201402L
    36	
    37	#include <unordered_map>
    38	#include <bits/erase_if.h>
    39	#include <experimental/memory_resource>
    40	
    41	namespace std _GLIBCXX_VISIBILITY(default)
    42	{
    43	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    44	
    45	namespace experimental
    46	{
    47	inline namespace fundamentals_v2
    48	{
    49	  template<typename _Key, typename _Tp, typename _Hash, typename _CPred,
    50		   typename _Alloc, typename _Predicate>
    51	    inline void
    52	    erase_if(unordered_map<_Key, _Tp, _Hash, _CPred, _Alloc>& __cont,
    53		     _Predicate __pred)
    54	    { std::__detail::__erase_nodes_if(__cont, __pred); }
    55	
    56	  template<typename _Key, typename _Tp, typename _Hash, typename _CPred,
    57		   typename _Alloc, typename _Predicate>
    58	    inline void
    59	    erase_if(unordered_multimap<_Key, _Tp, _Hash, _CPred, _Alloc>& __cont,
    60		     _Predicate __pred)
    61	    { std::__detail::__erase_nodes_if(__cont, __pred); }
    62	
    63	  namespace pmr {
    64	    template<typename _Key, typename _Tp, typename _Hash = hash<_Key>,
    65		     typename _Pred = equal_to<_Key>>
    66	      using unordered_map
    67	      = std::unordered_map<_Key, _Tp, _Hash, _Pred,
    68			 polymorphic_allocator<pair<const _Key, _Tp>>>;
    69	
    70	    template<typename _Key, typename _Tp, typename _Hash = hash<_Key>,
    71		     typename _Pred = equal_to<_Key>>
    72	      using unordered_multimap
    73	      = std::unordered_multimap<_Key, _Tp, _Hash, _Pred,
    74			      polymorphic_allocator<pair<const _Key, _Tp>>>;
    75	  } // namespace pmr
    76	
    77	} // namespace fundamentals_v2
    78	} // namespace experimental
    79	
    80	_GLIBCXX_END_NAMESPACE_VERSION
    81	} // namespace std
    82	
    83	#endif // C++14
    84	
    85	#endif // _GLIBCXX_EXPERIMENTAL_UNORDERED_MAP
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