libstdc++
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00001 // -*- C++ -*- 00002 00003 // Copyright (C) 2005, 2006, 2009, 2010 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the terms 00007 // of the GNU General Public License as published by the Free Software 00008 // Foundation; either version 3, or (at your option) any later 00009 // version. 00010 00011 // This library is distributed in the hope that it will be useful, but 00012 // WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 // General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 00026 00027 // Permission to use, copy, modify, sell, and distribute this software 00028 // is hereby granted without fee, provided that the above copyright 00029 // notice appears in all copies, and that both that copyright notice 00030 // and this permission notice appear in supporting documentation. None 00031 // of the above authors, nor IBM Haifa Research Laboratories, make any 00032 // representation about the suitability of this software for any 00033 // purpose. It is provided "as is" without express or implied 00034 // warranty. 00035 00036 /** 00037 * @file binary_heap_/point_const_iterator.hpp 00038 * Contains an iterator class returned by the table's const find and insert 00039 * methods. 00040 */ 00041 00042 #ifndef PB_DS_BINARY_HEAP_CONST_FIND_ITERATOR_HPP 00043 #define PB_DS_BINARY_HEAP_CONST_FIND_ITERATOR_HPP 00044 00045 #include <ext/pb_ds/tag_and_trait.hpp> 00046 #include <debug/debug.h> 00047 00048 namespace __gnu_pbds 00049 { 00050 namespace detail 00051 { 00052 /// Const point-type iterator. 00053 template<typename Value_Type, typename Entry, bool Simple, 00054 typename _Alloc> 00055 class binary_heap_point_const_iterator_ 00056 { 00057 protected: 00058 typedef typename _Alloc::template rebind<Entry>::other::pointer entry_pointer; 00059 00060 public: 00061 /// Category. 00062 typedef trivial_iterator_tag iterator_category; 00063 00064 /// Difference type. 00065 typedef trivial_iterator_difference_type difference_type; 00066 00067 /// Iterator's value type. 00068 typedef Value_Type value_type; 00069 00070 /// Iterator's pointer type. 00071 typedef typename _Alloc::template rebind<value_type>::other::pointer 00072 pointer; 00073 00074 /// Iterator's const pointer type. 00075 typedef 00076 typename _Alloc::template rebind<value_type>::other::const_pointer 00077 const_pointer; 00078 00079 /// Iterator's reference type. 00080 typedef 00081 typename _Alloc::template rebind<value_type>::other::reference 00082 reference; 00083 00084 /// Iterator's const reference type. 00085 typedef 00086 typename _Alloc::template rebind<value_type>::other::const_reference 00087 const_reference; 00088 00089 inline 00090 binary_heap_point_const_iterator_(entry_pointer p_e) : m_p_e(p_e) 00091 { } 00092 00093 /// Default constructor. 00094 inline 00095 binary_heap_point_const_iterator_() : m_p_e(0) { } 00096 00097 /// Copy constructor. 00098 inline 00099 binary_heap_point_const_iterator_(const binary_heap_point_const_iterator_& other) 00100 : m_p_e(other.m_p_e) 00101 { } 00102 00103 /// Access. 00104 inline const_pointer 00105 operator->() const 00106 { 00107 _GLIBCXX_DEBUG_ASSERT(m_p_e != 0); 00108 return to_ptr(integral_constant<int, Simple>()); 00109 } 00110 00111 /// Access. 00112 inline const_reference 00113 operator*() const 00114 { 00115 _GLIBCXX_DEBUG_ASSERT(m_p_e != 0); 00116 return *to_ptr(integral_constant<int, Simple>()); 00117 } 00118 00119 /// Compares content to a different iterator object. 00120 inline bool 00121 operator==(const binary_heap_point_const_iterator_& other) const 00122 { return m_p_e == other.m_p_e; } 00123 00124 /// Compares content (negatively) to a different iterator object. 00125 inline bool 00126 operator!=(const binary_heap_point_const_iterator_& other) const 00127 { return m_p_e != other.m_p_e; } 00128 00129 private: 00130 inline const_pointer 00131 to_ptr(true_type) const 00132 { return m_p_e; } 00133 00134 inline const_pointer 00135 to_ptr(false_type) const 00136 { return *m_p_e; } 00137 00138 public: 00139 entry_pointer m_p_e; 00140 }; 00141 } // namespace detail 00142 } // namespace __gnu_pbds 00143 00144 #endif