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  1. // -*- C++ -*-
  2.  
  3. // Copyright (C) 2005-2013 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 left_child_next_sibling_heap_/point_const_iterator.hpp
  38.  * Contains an iterator class returned by the table's const find and insert
  39.  * methods.
  40.  */
  41.  
  42. #ifndef PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_CONST_FIND_ITERATOR_HPP
  43. #define PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_CONST_FIND_ITERATOR_HPP
  44.  
  45. #include <ext/pb_ds/tag_and_trait.hpp>
  46. #include <debug/debug.h>
  47.  
  48. namespace __gnu_pbds
  49. {
  50.   namespace detail
  51.   {
  52.  
  53. #define PB_DS_CLASS_T_DEC                       \
  54.     template<typename Node, typename _Alloc>
  55.  
  56. #define PB_DS_CLASS_C_DEC \
  57.     left_child_next_sibling_heap_node_point_const_iterator_<Node, _Alloc>
  58.  
  59.     /// Const point-type iterator.
  60.     template<typename Node, typename _Alloc>
  61.     class left_child_next_sibling_heap_node_point_const_iterator_
  62.     {
  63.     protected:
  64.       typedef typename _Alloc::template rebind<Node>::other::pointer node_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 typename Node::value_type value_type;
  75.  
  76.       /// Iterator's pointer type.
  77.       typedef
  78.       typename _Alloc::template rebind<
  79.         value_type>::other::pointer
  80.       pointer;
  81.  
  82.       /// Iterator's const pointer type.
  83.       typedef
  84.       typename _Alloc::template rebind<
  85.         value_type>::other::const_pointer
  86.       const_pointer;
  87.  
  88.       /// Iterator's reference type.
  89.       typedef
  90.       typename _Alloc::template rebind<
  91.         value_type>::other::reference
  92.       reference;
  93.  
  94.       /// Iterator's const reference type.
  95.       typedef
  96.       typename _Alloc::template rebind<
  97.         value_type>::other::const_reference
  98.       const_reference;
  99.  
  100.       inline
  101.       left_child_next_sibling_heap_node_point_const_iterator_(node_pointer p_nd) : m_p_nd(p_nd)
  102.       { }
  103.  
  104.       /// Default constructor.
  105.       inline
  106.       left_child_next_sibling_heap_node_point_const_iterator_() : m_p_nd(0)
  107.       { }
  108.  
  109.       /// Copy constructor.
  110.       inline
  111.       left_child_next_sibling_heap_node_point_const_iterator_(const PB_DS_CLASS_C_DEC& other) : m_p_nd(other.m_p_nd)
  112.       { }
  113.  
  114.       /// Access.
  115.       const_pointer
  116.       operator->() const
  117.       {
  118.         _GLIBCXX_DEBUG_ASSERT(m_p_nd != 0);
  119.         return &m_p_nd->m_value;
  120.       }
  121.  
  122.       /// Access.
  123.       const_reference
  124.       operator*() const
  125.       {
  126.         _GLIBCXX_DEBUG_ASSERT(m_p_nd != 0);
  127.         return m_p_nd->m_value;
  128.       }
  129.  
  130.       /// Compares content to a different iterator object.
  131.       bool
  132.       operator==(const PB_DS_CLASS_C_DEC& other) const
  133.       { return m_p_nd == other.m_p_nd; }
  134.  
  135.       /// Compares content (negatively) to a different iterator object.
  136.       bool
  137.       operator!=(const PB_DS_CLASS_C_DEC& other) const
  138.       { return m_p_nd != other.m_p_nd; }
  139.  
  140.       node_pointer m_p_nd;
  141.     };
  142.  
  143. #undef PB_DS_CLASS_T_DEC
  144. #undef PB_DS_CLASS_C_DEC
  145.  
  146.   } // namespace detail
  147. } // namespace __gnu_pbds
  148.  
  149. #endif
  150.