1// -*- C++ -*-
2
3// Copyright (C) 2005-2015 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 pat_trie_/traits.hpp
38 * Contains an implementation class for pat_trie_.
39 */
40
41#ifndef PB_DS_PAT_TRIE_NODE_AND_IT_TRAITS_HPP
42#define PB_DS_PAT_TRIE_NODE_AND_IT_TRAITS_HPP
43
44#include <ext/pb_ds/detail/pat_trie_/pat_trie_base.hpp>
45#include <ext/pb_ds/detail/pat_trie_/synth_access_traits.hpp>
46
47namespace __gnu_pbds
48{
49  namespace detail
50  {
51    /// Specialization.
52    /// @ingroup traits
53    template<typename Key,
54	     typename Mapped,
55	     typename _ATraits,
56	     template<typename Node_CItr,
57		      typename Node_Itr,
58		      typename Cmp_Fn_,
59		      typename _Alloc_>
60	     class Node_Update,
61	     typename _Alloc>
62    struct trie_traits<Key, Mapped, _ATraits, Node_Update, pat_trie_tag, _Alloc>
63    {
64    private:
65      typedef pat_trie_base				    	base_type;
66      typedef types_traits<Key, Mapped, _Alloc, false> 		type_traits;
67
68    public:
69      typedef typename trie_node_metadata_dispatch<Key, Mapped, _ATraits, Node_Update, _Alloc>::type metadata_type;
70      typedef base_type::_Metadata<metadata_type, _Alloc>      	metadata;
71      typedef _ATraits 		       			       	access_traits;
72
73      /// Type for synthesized traits.
74      typedef __gnu_pbds::detail::synth_access_traits<type_traits, false, access_traits>   synth_access_traits;
75
76      typedef base_type::_Node_base<synth_access_traits, metadata>     	node;
77      typedef base_type::_Head<synth_access_traits, metadata>	       	head;
78      typedef base_type::_Leaf<synth_access_traits, metadata>	       	leaf;
79      typedef base_type::_Inode<synth_access_traits, metadata> 		inode;
80
81      typedef base_type::_Iter<node, leaf, head, inode, true>	       	iterator;
82      typedef base_type::_CIter<node, leaf, head, inode, true> 	 	const_iterator;
83      typedef base_type::_Iter<node, leaf, head, inode, false> 		reverse_iterator;
84      typedef base_type::_CIter<node, leaf, head, inode, false>	 	const_reverse_iterator;
85
86      /// This is an iterator to an iterator: it iterates over nodes,
87      /// and de-referencing it returns one of the tree's iterators.
88      typedef base_type::_Node_citer<node, leaf, head, inode, const_iterator, iterator, _Alloc> node_const_iterator;
89
90      typedef base_type::_Node_iter<node, leaf, head, inode, const_iterator, iterator, _Alloc> node_iterator;
91
92      /// Type for node update.
93      typedef Node_Update<node_const_iterator, node_iterator, _ATraits, _Alloc> 		node_update;
94
95      typedef null_node_update<node_const_iterator, node_iterator, _ATraits, _Alloc>* 		null_node_update_pointer;
96    };
97
98
99    /// Specialization.
100    /// @ingroup traits
101    template<typename Key,
102	     typename _ATraits,
103	     template<typename Node_CItr,
104		      typename Node_Itr,
105		      typename Cmp_Fn_,
106		      typename _Alloc_>
107	     class Node_Update,
108	     typename _Alloc>
109    struct trie_traits<Key, null_type, _ATraits, Node_Update, pat_trie_tag, _Alloc>
110    {
111    private:
112      typedef pat_trie_base					base_type;
113      typedef types_traits<Key, null_type, _Alloc, false> 	type_traits;
114
115    public:
116      typedef typename trie_node_metadata_dispatch<Key, null_type, _ATraits, Node_Update, _Alloc>::type metadata_type;
117      typedef base_type::_Metadata<metadata_type, _Alloc>				metadata;
118      typedef _ATraits 				     					access_traits;
119
120      /// Type for synthesized traits.
121      typedef __gnu_pbds::detail::synth_access_traits<type_traits, true, access_traits> synth_access_traits;
122
123      typedef base_type::_Node_base<synth_access_traits, metadata>     	node;
124      typedef base_type::_Head<synth_access_traits, metadata> 	       	head;
125      typedef base_type::_Leaf<synth_access_traits, metadata> 	       	leaf;
126      typedef base_type::_Inode<synth_access_traits, metadata> 	       	inode;
127
128      typedef base_type::_CIter<node, leaf, head, inode, true> 		const_iterator;
129      typedef const_iterator 					       	iterator;
130      typedef base_type::_CIter<node, leaf, head, inode, false>	       	const_reverse_iterator;
131      typedef const_reverse_iterator 			       		reverse_iterator;
132
133      /// This is an iterator to an iterator: it iterates over nodes,
134      /// and de-referencing it returns one of the tree's iterators.
135      typedef base_type::_Node_citer<node, leaf, head, inode, const_iterator, iterator, _Alloc> node_const_iterator;
136
137      typedef node_const_iterator 								node_iterator;
138
139      /// Type for node update.
140      typedef Node_Update<node_const_iterator, node_iterator, _ATraits, _Alloc> 		node_update;
141
142      typedef null_node_update<node_const_iterator, node_const_iterator, _ATraits, _Alloc>* 	null_node_update_pointer;
143    };
144
145  } // namespace detail
146} // namespace __gnu_pbds
147
148#endif // #ifndef PB_DS_PAT_TRIE_NODE_AND_IT_TRAITS_HPP
149