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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009, 2011 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the terms

// of the GNU General Public License as published by the Free Software

// Foundation; either version 3, or (at your option) any later

// version.

// This library is distributed in the hope that it will be useful, but

// WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

// General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software

// is hereby granted without fee, provided that the above copyright

// notice appears in all copies, and that both that copyright notice

// and this permission notice appear in supporting documentation. None

// of the above authors, nor IBM Haifa Research Laboratories, make any

// representation about the suitability of this software for any

// purpose. It is provided "as is" without express or implied

// warranty.

/**

 * @file pat_trie_/traits.hpp

 * Contains an implementation class for pat_trie_.

 */

#ifndef PB_DS_PAT_TRIE_NODE_AND_IT_TRAITS_HPP

#define PB_DS_PAT_TRIE_NODE_AND_IT_TRAITS_HPP

#include <ext/pb_ds/detail/pat_trie_/pat_trie_base.hpp>

#include <ext/pb_ds/detail/pat_trie_/synth_access_traits.hpp>

namespace __gnu_pbds

{

  namespace detail

  {

    /// Specialization.

    /// @ingroup traits

    template<typename Key,

             typename Mapped,

             typename _ATraits,

             template<typename Node_CItr,

                      typename Node_Itr,

                      typename Cmp_Fn_,

                      typename _Alloc_>

             class Node_Update,

             typename _Alloc>

    struct trie_traits<Key, Mapped, _ATraits, Node_Update, pat_trie_tag, _Alloc>

    {

    private:

      typedef pat_trie_base                                     base_type;

      typedef types_traits<Key, Mapped, _Alloc, false>          type_traits;

    public:

      typedef typename trie_node_metadata_dispatch<Key, Mapped, _ATraits, Node_Update, _Alloc>::type metadata_type;

      typedef base_type::_Metadata<metadata_type, _Alloc>       metadata;

      typedef _ATraits                                          access_traits;

      /// Type for synthesized traits.

      typedef __gnu_pbds::detail::synth_access_traits<type_traits, false, access_traits>   synth_access_traits;

      typedef base_type::_Node_base<synth_access_traits, metadata>      node;

      typedef base_type::_Head<synth_access_traits, metadata>           head;

      typedef base_type::_Leaf<synth_access_traits, metadata>           leaf;

      typedef base_type::_Inode<synth_access_traits, metadata>          inode;

      typedef base_type::_Iter<node, leaf, head, inode, true>           iterator;

      typedef base_type::_CIter<node, leaf, head, inode, true>          const_iterator;

      typedef base_type::_Iter<node, leaf, head, inode, false>          reverse_iterator;

      typedef base_type::_CIter<node, leaf, head, inode, false>         const_reverse_iterator;

      /// This is an iterator to an iterator: it iterates over nodes,

      /// and de-referencing it returns one of the tree's iterators.

      typedef base_type::_Node_citer<node, leaf, head, inode, const_iterator, iterator, _Alloc> node_const_iterator;

      typedef base_type::_Node_iter<node, leaf, head, inode, const_iterator, iterator, _Alloc> node_iterator;

      /// Type for node update.

      typedef Node_Update<node_const_iterator, node_iterator, _ATraits, _Alloc>                 node_update;

      typedef null_node_update<node_const_iterator, node_iterator, _ATraits, _Alloc>*           null_node_update_pointer;

    };

    /// Specialization.

    /// @ingroup traits

    template<typename Key,

             typename _ATraits,

             template<typename Node_CItr,

                      typename Node_Itr,

                      typename Cmp_Fn_,

                      typename _Alloc_>

             class Node_Update,

             typename _Alloc>

    struct trie_traits<Key, null_type, _ATraits, Node_Update, pat_trie_tag, _Alloc>

    {

    private:

      typedef pat_trie_base                                     base_type;

      typedef types_traits<Key, null_type, _Alloc, false>       type_traits;

    public:

      typedef typename trie_node_metadata_dispatch<Key, null_type, _ATraits, Node_Update, _Alloc>::type metadata_type;

      typedef base_type::_Metadata<metadata_type, _Alloc>                               metadata;

      typedef _ATraits                                                                  access_traits;

      /// Type for synthesized traits.

      typedef __gnu_pbds::detail::synth_access_traits<type_traits, true, access_traits> synth_access_traits;

      typedef base_type::_Node_base<synth_access_traits, metadata>      node;

      typedef base_type::_Head<synth_access_traits, metadata>           head;

      typedef base_type::_Leaf<synth_access_traits, metadata>           leaf;

      typedef base_type::_Inode<synth_access_traits, metadata>          inode;

      typedef base_type::_CIter<node, leaf, head, inode, true>          const_iterator;

      typedef const_iterator                                            iterator;

      typedef base_type::_CIter<node, leaf, head, inode, false>         const_reverse_iterator;

      typedef const_reverse_iterator                                    reverse_iterator;

      /// This is an iterator to an iterator: it iterates over nodes,

      /// and de-referencing it returns one of the tree's iterators.

      typedef base_type::_Node_citer<node, leaf, head, inode, const_iterator, iterator, _Alloc> node_const_iterator;

      typedef node_const_iterator                                                               node_iterator;

      /// Type for node update.

      typedef Node_Update<node_const_iterator, node_iterator, _ATraits, _Alloc>                 node_update;

      typedef null_node_update<node_const_iterator, node_const_iterator, _ATraits, _Alloc>*     null_node_update_pointer;

    };

  } // namespace detail

} // namespace __gnu_pbds

#endif // #ifndef PB_DS_PAT_TRIE_NODE_AND_IT_TRAITS_HPP