The C and C++ Include Header Files

/usr/include/c++/11/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp


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     1	// -*- C++ -*-
     2	
     3	// Copyright (C) 2005-2021 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 terms
     7	// of the GNU General Public License as published by the Free Software
     8	// Foundation; either version 3, or (at your option) any later
     9	// version.
    10	
    11	// This library is distributed in the hope that it will be useful, but
    12	// WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    14	// 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	// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
    26	
    27	// Permission to use, copy, modify, sell, and distribute this software
    28	// is hereby granted without fee, provided that the above copyright
    29	// notice appears in all copies, and that both that copyright notice
    30	// and this permission notice appear in supporting documentation. None
    31	// of the above authors, nor IBM Haifa Research Laboratories, make any
    32	// representation about the suitability of this software for any
    33	// purpose. It is provided "as is" without express or implied
    34	// warranty.
    35	
    36	/**
    37	 * @file unordered_iterator/const_iterator.hpp
    38	 * Contains an iterator class used for const ranging over the elements of the
    39	 * table.
    40	 *
    41	 * This file is intended to be included inside a class definition, with
    42	 * PB_DS_CLASS_C_DEC defined to the name of the enclosing class.
    43	 */
    44	
    45	#ifdef PB_DS_CLASS_C_DEC
    46	/// Const range-type iterator.
    47	class const_iterator_
    48	: public point_const_iterator_
    49	{
    50	public:
    51	  /// Category.
    52	  typedef std::forward_iterator_tag iterator_category;
    53	
    54	  /// Difference type.
    55	  typedef typename _Alloc::difference_type difference_type;
    56	
    57	  /// Iterator's value type.
    58	  typedef value_type_ value_type;
    59	
    60	  /// Iterator's pointer type.
    61	  typedef pointer_ pointer;
    62	
    63	  /// Iterator's const pointer type.
    64	  typedef const_pointer_ const_pointer;
    65	
    66	  /// Iterator's reference type.
    67	  typedef reference_ reference;
    68	
    69	  /// Iterator's const reference type.
    70	  typedef const_reference_ const_reference;
    71	
    72	  /// Default constructor.
    73	  const_iterator_() : m_p_tbl(0)
    74	  { }
    75	
    76	  /// Increments.
    77	  const_iterator_&
    78	  operator++()
    79	  {
    80	    m_p_tbl->inc_it_state(base_type::m_p_value, m_pos);
    81	    return *this;
    82	  }
    83	
    84	  /// Increments.
    85	  const_iterator_
    86	  operator++(int)
    87	  {
    88	    const_iterator_ ret =* this;
    89	    m_p_tbl->inc_it_state(base_type::m_p_value, m_pos);
    90	    return ret;
    91	  }
    92	
    93	protected:
    94	  typedef point_const_iterator_ base_type;
    95	
    96	  /**
    97	   *  Constructor used by the table to initiate the generalized
    98	   *      pointer and position (e.g., this is called from within a find()
    99	   *      of a table.
   100	   * */
   101	  const_iterator_(const_pointer_ p_value,  PB_DS_GEN_POS pos,
   102			  const PB_DS_CLASS_C_DEC* p_tbl)
   103	  : point_const_iterator_(p_value), m_p_tbl(p_tbl), m_pos(pos)
   104	  { }
   105	
   106	  /**
   107	   *  Pointer to the table object which created the iterator (used for
   108	   *      incrementing its position.
   109	   * */
   110	  const PB_DS_CLASS_C_DEC* m_p_tbl;
   111	
   112	  PB_DS_GEN_POS m_pos;
   113	
   114	  friend class PB_DS_CLASS_C_DEC;
   115	};
   116	#endif