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The C and C++ Include Header Files

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

     1	// <deque> -*- 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) 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/deque
    52	 *  This is a Standard C++ Library header.
    53	 */
    54	
    55	#ifndef _GLIBCXX_DEQUE
    56	#define _GLIBCXX_DEQUE 1
    57	
    58	#ifdef _GLIBCXX_SYSHDR
    59	#pragma GCC system_header
    60	#endif
    61	
    62	#include <bits/requires_hosted.h> // containers are hosted only
    63	
    64	#include <bits/stl_algobase.h>
    65	#include <bits/allocator.h>
    66	#include <bits/stl_construct.h>
    67	#include <bits/stl_uninitialized.h>
    68	#include <bits/stl_deque.h>
    69	#include <bits/refwrap.h>
    70	#include <bits/range_access.h>
    71	#include <bits/deque.tcc>
    72	
    73	#define __glibcxx_want_algorithm_default_value_type
    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_nonmember_container_access
    78	#include <bits/version.h>
    79	
    80	#ifdef _GLIBCXX_DEBUG
    81	# include <debug/deque>
    82	#endif
    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 _Tp>
    92	      using deque = std::deque<_Tp, polymorphic_allocator<_Tp>>;
    93	  } // namespace pmr
    94	_GLIBCXX_END_NAMESPACE_VERSION
    95	} // namespace std
    96	#endif // C++17
    97	
    98	#ifdef __cpp_lib_erase_if // C++ >= 20 && erase_if
    99	namespace std _GLIBCXX_VISIBILITY(default)
   100	{
   101	_GLIBCXX_BEGIN_NAMESPACE_VERSION
   102	
   103	  template<typename _Tp, typename _Alloc, typename _Predicate>
   104	    inline typename deque<_Tp, _Alloc>::size_type
   105	    erase_if(deque<_Tp, _Alloc>& __cont, _Predicate __pred)
   106	    {
   107	      using namespace __gnu_cxx;
   108	      _GLIBCXX_STD_C::deque<_Tp, _Alloc>& __ucont = __cont;
   109	      const auto __osz = __cont.size();
   110	      const auto __end = __ucont.end();
   111	      auto __removed = std::__remove_if(__ucont.begin(), __end,
   112						__ops::__pred_iter(std::ref(__pred)));
   113	      if (__removed != __end)
   114		{
   115		  __cont.erase(__niter_wrap(__cont.begin(), __removed),
   116			       __cont.end());
   117		  return __osz - __cont.size();
   118		}
   119	
   120	      return 0;
   121	    }
   122	
   123	  template<typename _Tp, typename _Alloc,
   124		   typename _Up _GLIBCXX26_DEF_VAL_T(_Tp)>
   125	    inline typename deque<_Tp, _Alloc>::size_type
   126	    erase(deque<_Tp, _Alloc>& __cont, const _Up& __value)
   127	    {
   128	      using namespace __gnu_cxx;
   129	      _GLIBCXX_STD_C::deque<_Tp, _Alloc>& __ucont = __cont;
   130	      const auto __osz = __cont.size();
   131	      const auto __end = __ucont.end();
   132	      auto __removed = std::__remove_if(__ucont.begin(), __end,
   133						__ops::__iter_equals_val(__value));
   134	      if (__removed != __end)
   135		{
   136		  __cont.erase(__niter_wrap(__cont.begin(), __removed),
   137			       __cont.end());
   138		  return __osz - __cont.size();
   139		}
   140	
   141	      return 0;
   142	    }
   143	_GLIBCXX_END_NAMESPACE_VERSION
   144	} // namespace std
   145	#endif // __cpp_lib_erase_if
   146	
   147	#endif /* _GLIBCXX_DEQUE */