Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  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 branch_policy/branch_policy.hpp
  38.  * Contains a base class for branch policies.
  39.  */
  40.  
  41. #ifndef PB_DS_BRANCH_POLICY_BASE_HPP
  42. #define PB_DS_BRANCH_POLICY_BASE_HPP
  43.  
  44. #include <ext/pb_ds/tag_and_trait.hpp>
  45.  
  46. namespace __gnu_pbds
  47. {
  48.   namespace detail
  49.   {
  50.     /// Primary template, base class for branch structure policies.
  51.     template<typename Node_CItr, typename Node_Itr, typename _Alloc>
  52.       struct branch_policy
  53.       {
  54.       protected:
  55.         typedef typename Node_Itr::value_type           it_type;
  56.         typedef typename std::iterator_traits<it_type>::value_type value_type;
  57.         typedef typename value_type::first_type         key_type;
  58.  
  59.         typedef typename remove_const<value_type>::type rcvalue_type;
  60.         typedef typename remove_const<key_type>::type   rckey_type;
  61.  
  62.         typedef typename _Alloc::template rebind<rcvalue_type>::other rebind_v;
  63.         typedef typename _Alloc::template rebind<rckey_type>::other   rebind_k;
  64.  
  65.         typedef typename rebind_v::reference            reference;
  66.         typedef typename rebind_v::const_reference      const_reference;
  67.         typedef typename rebind_v::const_pointer        const_pointer;
  68.  
  69.         typedef typename rebind_k::const_reference      key_const_reference;
  70.  
  71.         static inline key_const_reference
  72.         extract_key(const_reference r_val)
  73.         { return r_val.first; }
  74.  
  75.         virtual it_type
  76.         end() = 0;
  77.  
  78.         it_type
  79.         end_iterator() const
  80.         { return const_cast<branch_policy*>(this)->end(); }
  81.  
  82.         virtual
  83.         ~branch_policy() { }
  84.       };
  85.  
  86.     /// Specialization for const iterators.
  87.     template<typename Node_CItr, typename _Alloc>
  88.       struct branch_policy<Node_CItr, Node_CItr, _Alloc>
  89.       {
  90.       protected:
  91.         typedef typename Node_CItr::value_type             it_type;
  92.         typedef typename std::iterator_traits<it_type>::value_type value_type;
  93.         typedef typename remove_const<value_type>::type            rcvalue_type;
  94.         typedef typename _Alloc::template rebind<rcvalue_type>::other rebind_v;
  95.         typedef typename rebind_v::reference            reference;
  96.         typedef typename rebind_v::const_reference      const_reference;
  97.         typedef typename rebind_v::const_pointer        const_pointer;
  98.  
  99.         typedef value_type                              key_type;
  100.         typedef typename rebind_v::const_reference      key_const_reference;
  101.  
  102.         static inline key_const_reference
  103.         extract_key(const_reference r_val)
  104.         { return r_val; }
  105.  
  106.         virtual it_type
  107.         end() const = 0;
  108.  
  109.         it_type
  110.         end_iterator() const
  111.         { return end(); }
  112.  
  113.         virtual
  114.         ~branch_policy() { }
  115.       };
  116.   } // namespace detail
  117. } // namespace __gnu_pbds
  118.  
  119. #endif // #ifndef PB_DS_BRANCH_POLICY_BASE_HPP
  120.