3 // Copyright (C) 2005-2018 Free Software Foundation, Inc.
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
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.
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.
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/>.
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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
37 * @file trie_policy/node_metadata_selector.hpp
38 * Contains an implementation class for tries.
41 #ifndef PB_DS_TRIE_NODE_METADATA_DISPATCH_HPP
42 #define PB_DS_TRIE_NODE_METADATA_DISPATCH_HPP
44 #include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
45 #include <ext/pb_ds/detail/types_traits.hpp>
52 * @addtogroup traits Traits
56 /// Trie metadata helper.
57 template<typename Node_Update
, bool _BTp
>
58 struct trie_metadata_helper
;
60 /// Specialization, false.
61 template<typename Node_Update
>
62 struct trie_metadata_helper
<Node_Update
, false>
64 typedef typename
Node_Update::metadata_type type
;
67 /// Specialization, true.
68 template<typename Node_Update
>
69 struct trie_metadata_helper
<Node_Update
, true>
71 typedef null_type type
;
74 /// Trie node metadata dispatch.
75 template<typename Key
,
78 template<typename Node_CItr
,
79 typename Const_Iterator
,
84 struct trie_node_metadata_dispatch
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
;
93 null_update
= is_same
<__node_u
, __nnode_u
>::value
97 typedef typename trie_metadata_helper
<__node_u
, null_update
>::type type
;
100 } // namespace detail
101 } // namespace __gnu_pbds
103 #endif // #ifndef PB_DS_TRIE_NODE_METADATA_DISPATCH_HPP