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The C and C++ Include Header Files

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

     1	// <experimental/set> -*- C++ -*-
     2	
     3	// Copyright (C) 2015-2025 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	/** @file experimental/set
    26	 *  This is a TS C++ Library header.
    27	 *  @ingroup libfund-ts
    28	 */
    29	
    30	#ifndef _GLIBCXX_EXPERIMENTAL_SET
    31	#define _GLIBCXX_EXPERIMENTAL_SET 1
    32	
    33	#ifdef _GLIBCXX_SYSHDR
    34	#pragma GCC system_header
    35	#endif
    36	
    37	#include <bits/requires_hosted.h> // experimental is currently omitted
    38	
    39	#if __cplusplus >= 201402L
    40	
    41	#include <set>
    42	#include <bits/erase_if.h>
    43	#include <experimental/memory_resource>
    44	
    45	namespace std _GLIBCXX_VISIBILITY(default)
    46	{
    47	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    48	
    49	namespace experimental
    50	{
    51	inline namespace fundamentals_v2
    52	{
    53	  template<typename _Key, typename _Compare, typename _Alloc,
    54		   typename _Predicate>
    55	    inline void
    56	    erase_if(set<_Key, _Compare, _Alloc>& __cont, _Predicate __pred)
    57	    {
    58	      _GLIBCXX_STD_C::set<_Key, _Compare, _Alloc>& __ucont = __cont;
    59	      std::__detail::__erase_nodes_if(__cont, __ucont, __pred);
    60	    }
    61	
    62	  template<typename _Key, typename _Compare, typename _Alloc,
    63		   typename _Predicate>
    64	    inline void
    65	    erase_if(multiset<_Key, _Compare, _Alloc>& __cont, _Predicate __pred)
    66	    {
    67	      _GLIBCXX_STD_C::multiset<_Key, _Compare, _Alloc>& __ucont = __cont;
    68	      std::__detail::__erase_nodes_if(__cont, __ucont, __pred);
    69	    }
    70	
    71	  namespace pmr {
    72	    template<typename _Key, typename _Compare = less<_Key>>
    73	      using set = std::set<_Key, _Compare, polymorphic_allocator<_Key>>;
    74	
    75	    template<typename _Key, typename _Compare = less<_Key>>
    76	      using multiset = std::multiset<_Key, _Compare,
    77					     polymorphic_allocator<_Key>>;
    78	  } // namespace pmr
    79	
    80	} // namespace fundamentals_v2
    81	} // namespace experimental
    82	
    83	_GLIBCXX_END_NAMESPACE_VERSION
    84	} // namespace std
    85	
    86	#endif // C++14
    87	
    88	#endif // _GLIBCXX_EXPERIMENTAL_SET