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4569a895 AT |
1 | // -*- C++ -*- |
2 | ||
a5544970 | 3 | // Copyright (C) 2005-2019 Free Software Foundation, Inc. |
4569a895 AT |
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 | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
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 | ||
748086b7 JJ |
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. | |
4569a895 | 19 | |
748086b7 JJ |
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/>. | |
4569a895 AT |
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 | /** | |
a345e45d | 37 | * @file detail/standard_policies.hpp |
4569a895 AT |
38 | * Contains standard policies for containers. |
39 | */ | |
40 | ||
41 | #ifndef PB_DS_STANDARD_POLICIES_HPP | |
42 | #define PB_DS_STANDARD_POLICIES_HPP | |
43 | ||
44 | #include <memory> | |
45 | #include <ext/pb_ds/hash_policy.hpp> | |
46 | #include <ext/pb_ds/list_update_policy.hpp> | |
a345e45d | 47 | #include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp> |
4569a895 | 48 | #include <ext/pb_ds/tree_policy.hpp> |
4569a895 AT |
49 | #include <ext/pb_ds/trie_policy.hpp> |
50 | #include <ext/pb_ds/tag_and_trait.hpp> | |
0c3de900 | 51 | #include <tr1/functional> |
4569a895 | 52 | |
5e11f978 | 53 | namespace __gnu_pbds |
4569a895 AT |
54 | { |
55 | namespace detail | |
56 | { | |
30a96b3b | 57 | /// Primary template, default_hash_fn. |
4569a895 AT |
58 | template<typename Key> |
59 | struct default_hash_fn | |
60 | { | |
30a96b3b BK |
61 | /// Dispatched type. |
62 | typedef std::tr1::hash<Key> type; | |
4569a895 AT |
63 | }; |
64 | ||
30a96b3b | 65 | /// Primary template, default_eq_fn. |
4569a895 AT |
66 | template<typename Key> |
67 | struct default_eq_fn | |
68 | { | |
30a96b3b BK |
69 | /// Dispatched type. |
70 | typedef std::equal_to<Key> type; | |
4569a895 AT |
71 | }; |
72 | ||
30a96b3b | 73 | /// Enumeration for default behavior of stored hash data. |
4569a895 AT |
74 | enum |
75 | { | |
76 | default_store_hash = false | |
77 | }; | |
78 | ||
30a96b3b | 79 | /// Primary template, default_comb_hash_fn. |
4569a895 AT |
80 | struct default_comb_hash_fn |
81 | { | |
30a96b3b BK |
82 | /// Dispatched type. |
83 | typedef direct_mask_range_hashing<> type; | |
4569a895 AT |
84 | }; |
85 | ||
30a96b3b | 86 | /// Primary template, default_resize_policy. |
4569a895 AT |
87 | template<typename Comb_Hash_Fn> |
88 | struct default_resize_policy | |
89 | { | |
90 | private: | |
30a96b3b | 91 | typedef typename Comb_Hash_Fn::size_type size_type; |
4569a895 | 92 | |
30a96b3b BK |
93 | typedef direct_mask_range_hashing<size_type> default_fn; |
94 | typedef is_same<default_fn, Comb_Hash_Fn> same_type; | |
95 | typedef hash_exponential_size_policy<size_type> iftrue; | |
96 | typedef hash_prime_size_policy iffalse; | |
0c3de900 | 97 | typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type; |
30a96b3b | 98 | typedef typename cond_type::__type size_policy_type; |
0c3de900 | 99 | |
30a96b3b | 100 | typedef hash_load_check_resize_trigger<false, size_type> trigger; |
4569a895 AT |
101 | |
102 | public: | |
30a96b3b BK |
103 | /// Dispatched type. |
104 | typedef hash_standard_resize_policy<size_policy_type, trigger, | |
105 | false, size_type> type; | |
4569a895 AT |
106 | }; |
107 | ||
30a96b3b | 108 | /// Default update policy. |
4569a895 AT |
109 | struct default_update_policy |
110 | { | |
30a96b3b BK |
111 | /// Dispatched type. |
112 | typedef lu_move_to_front_policy<> type; | |
4569a895 AT |
113 | }; |
114 | ||
30a96b3b | 115 | /// Primary template, default_probe_fn. |
4569a895 AT |
116 | template<typename Comb_Probe_Fn> |
117 | struct default_probe_fn | |
118 | { | |
119 | private: | |
30a96b3b BK |
120 | typedef typename Comb_Probe_Fn::size_type size_type; |
121 | typedef direct_mask_range_hashing<size_type> default_fn; | |
122 | typedef is_same<default_fn, Comb_Probe_Fn> same_type; | |
123 | typedef linear_probe_fn<size_type> iftrue; | |
124 | typedef quadratic_probe_fn<size_type> iffalse; | |
0c3de900 BK |
125 | typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type; |
126 | ||
4569a895 | 127 | public: |
30a96b3b BK |
128 | /// Dispatched type. |
129 | typedef typename cond_type::__type type; | |
4569a895 AT |
130 | }; |
131 | ||
30a96b3b BK |
132 | |
133 | /// Primary template, default_trie_access_traits. | |
4569a895 | 134 | template<typename Key> |
30a96b3b BK |
135 | struct default_trie_access_traits; |
136 | ||
137 | #define __dtrie_alloc std::allocator<char> | |
138 | #define __dtrie_string std::basic_string<Char, Char_Traits, __dtrie_alloc> | |
4569a895 | 139 | |
30a96b3b | 140 | /// Partial specialization, default_trie_access_traits. |
a345e45d | 141 | template<typename Char, typename Char_Traits> |
30a96b3b BK |
142 | struct default_trie_access_traits<__dtrie_string> |
143 | { | |
144 | private: | |
145 | typedef __dtrie_string string_type; | |
0c3de900 | 146 | |
30a96b3b BK |
147 | public: |
148 | /// Dispatched type. | |
149 | typedef trie_string_access_traits<string_type> type; | |
150 | }; | |
151 | ||
152 | #undef __dtrie_alloc | |
153 | #undef __dtrie_string | |
4569a895 AT |
154 | |
155 | } // namespace detail | |
5e11f978 | 156 | } // namespace __gnu_pbds |
4569a895 AT |
157 | |
158 | #endif // #ifndef PB_DS_STANDARD_POLICIES_HPP |