mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/binary_heap_/const_point_iterator.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file const_point_iterator.hpp
  44  * Contains an iterator class returned by the table's const find and insert
  45  *     methods.
  46  */
  47
  48 #ifndef PB_DS_BINARY_HEAP_CONST_FIND_ITERATOR_HPP
  49 #define PB_DS_BINARY_HEAP_CONST_FIND_ITERATOR_HPP
  50
  51 #include <ext/pb_ds/tag_and_trait.hpp>
  52 #include <debug/debug.h>
  53
  54 namespace __gnu_pbds
  55 {
  56   namespace detail
  57   {
  58     // Const point-type iterator.
  59     template<typename Value_Type, typename Entry, bool Simple,
  60              typename Allocator>
  61     class binary_heap_const_point_iterator_
  62     {
  63     protected:
  64       typedef typename Allocator::template rebind<Entry>::other::pointer entry_pointer;
  65
  66     public:
  67       // Category.
  68       typedef trivial_iterator_tag iterator_category;
  69
  70       // Difference type.
  71       typedef trivial_iterator_difference_type difference_type;
  72
  73       // Iterator's value type.
  74       typedef Value_Type value_type;
  75
  76       // Iterator's pointer type.
  77       typedef typename Allocator::template rebind<value_type>::other::pointer
  78       pointer;
  79
  80       // Iterator's const pointer type.
  81       typedef
  82       typename Allocator::template rebind<value_type>::other::const_pointer
  83       const_pointer;
  84
  85       // Iterator's reference type.
  86       typedef
  87       typename Allocator::template rebind<value_type>::other::reference
  88       reference;
  89
  90       // Iterator's const reference type.
  91       typedef
  92       typename Allocator::template rebind<value_type>::other::const_reference
  93       const_reference;
  94
  95       inline
  96       binary_heap_const_point_iterator_(entry_pointer p_e) : m_p_e(p_e)
  97       { }
  98
  99       // Default constructor.
 100       inline
 101       binary_heap_const_point_iterator_() : m_p_e(NULL) { }
 102
 103       // Copy constructor.
 104       inline
 105       binary_heap_const_point_iterator_(const binary_heap_const_point_iterator_& other)
 106       : m_p_e(other.m_p_e)
 107       { }
 108
 109       // Access.
 110       inline const_pointer
 111       operator->() const
 112       {
 113         _GLIBCXX_DEBUG_ASSERT(m_p_e != NULL);
 114         return to_ptr(integral_constant<int, Simple>());
 115       }
 116
 117       // Access.
 118       inline const_reference
 119       operator*() const
 120       {
 121         _GLIBCXX_DEBUG_ASSERT(m_p_e != NULL);
 122         return *to_ptr(integral_constant<int, Simple>());
 123       }
 124
 125       // Compares content to a different iterator object.
 126       inline bool
 127       operator==(const binary_heap_const_point_iterator_& other) const
 128       { return m_p_e == other.m_p_e; }
 129
 130       // Compares content (negatively) to a different iterator object.
 131       inline bool
 132       operator!=(const binary_heap_const_point_iterator_& other) const
 133       { return m_p_e != other.m_p_e; }
 134
 135     private:
 136       inline const_pointer
 137       to_ptr(true_type) const
 138       { return m_p_e; }
 139
 140       inline const_pointer
 141       to_ptr(false_type) const
 142       { return *m_p_e; }
 143
 144     public:
 145       entry_pointer m_p_e;
 146     };
 147   } // namespace detail
 148 } // namespace __gnu_pbds
 149
 150 #endif