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36fed23c | 1 | // -*- C++ -*- |
2 | ||
f1717362 | 3 | // Copyright (C) 2005-2016 Free Software Foundation, Inc. |
36fed23c | 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 | |
6bc9506f | 8 | // Foundation; either version 3, or (at your option) any later |
36fed23c | 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 | ||
6bc9506f | 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. | |
36fed23c | 19 | |
6bc9506f | 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/>. | |
36fed23c | 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 | /** | |
4f4a327e | 37 | * @file trie_policy/node_metadata_selector.hpp |
36fed23c | 38 | * Contains an implementation class for tries. |
39 | */ | |
40 | ||
4f4a327e | 41 | #ifndef PB_DS_TRIE_NODE_METADATA_DISPATCH_HPP |
42 | #define PB_DS_TRIE_NODE_METADATA_DISPATCH_HPP | |
36fed23c | 43 | |
4f4a327e | 44 | #include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp> |
36fed23c | 45 | #include <ext/pb_ds/detail/types_traits.hpp> |
46 | ||
b34535d7 | 47 | namespace __gnu_pbds |
36fed23c | 48 | { |
49 | namespace detail | |
50 | { | |
3f2eba6f | 51 | /** |
52 | * @addtogroup traits Traits | |
53 | * @{ | |
54 | */ | |
55 | ||
4f4a327e | 56 | /// Trie metadata helper. |
57 | template<typename Node_Update, bool _BTp> | |
58 | struct trie_metadata_helper; | |
36fed23c | 59 | |
3f2eba6f | 60 | /// Specialization, false. |
4f4a327e | 61 | template<typename Node_Update> |
62 | struct trie_metadata_helper<Node_Update, false> | |
63 | { | |
64 | typedef typename Node_Update::metadata_type type; | |
65 | }; | |
36fed23c | 66 | |
3f2eba6f | 67 | /// Specialization, true. |
36fed23c | 68 | template<typename Node_Update> |
4f4a327e | 69 | struct trie_metadata_helper<Node_Update, true> |
70 | { | |
71 | typedef null_type type; | |
72 | }; | |
36fed23c | 73 | |
4f4a327e | 74 | /// Trie node metadata dispatch. |
36fed23c | 75 | template<typename Key, |
76 | typename Data, | |
4f4a327e | 77 | typename Cmp_Fn, |
78 | template<typename Node_CItr, | |
79 | typename Const_Iterator, | |
80 | typename Cmp_Fn_, | |
81 | typename _Alloc_> | |
82 | class Node_Update, | |
83 | typename _Alloc> | |
84 | struct trie_node_metadata_dispatch | |
36fed23c | 85 | { |
86 | private: | |
4f4a327e | 87 | typedef dumnode_const_iterator<Key, Data, _Alloc> __it_type; |
88 | typedef Node_Update<__it_type, __it_type, Cmp_Fn, _Alloc> __node_u; | |
89 | typedef null_node_update<__it_type, __it_type, Cmp_Fn, _Alloc> __nnode_u; | |
36fed23c | 90 | |
91 | enum | |
92 | { | |
4f4a327e | 93 | null_update = is_same<__node_u, __nnode_u>::value |
36fed23c | 94 | }; |
95 | ||
96 | public: | |
4f4a327e | 97 | typedef typename trie_metadata_helper<__node_u, null_update>::type type; |
36fed23c | 98 | }; |
3f2eba6f | 99 | //@} |
36fed23c | 100 | } // namespace detail |
b34535d7 | 101 | } // namespace __gnu_pbds |
36fed23c | 102 | |
4f4a327e | 103 | #endif // #ifndef PB_DS_TRIE_NODE_METADATA_DISPATCH_HPP |