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1 | // Boost.Bimap |
2 | // | |
3 | // Copyright (c) 2006-2007 Matias Capeletto | |
4 | // | |
5 | // Distributed under the Boost Software License, Version 1.0. | |
6 | // (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | ||
9 | /// \file detail/manage_additional_parameters.hpp | |
10 | /// \brief Utility class to extract the additional parameters from the template parameters. | |
11 | ||
12 | #ifndef BOOST_BIMAP_DETAIL_MANAGE_ADDITIONAL_PARAMETERS_HPP | |
13 | #define BOOST_BIMAP_DETAIL_MANAGE_ADDITIONAL_PARAMETERS_HPP | |
14 | ||
15 | #if defined(_MSC_VER) | |
16 | #pragma once | |
17 | #endif | |
18 | ||
19 | #include <boost/config.hpp> | |
20 | ||
21 | #include <memory> | |
22 | ||
23 | // Boost.MPL | |
24 | #include <boost/mpl/bool.hpp> | |
25 | #include <boost/mpl/if.hpp> | |
26 | #include <boost/mpl/aux_/na.hpp> | |
27 | #include <boost/type_traits/is_same.hpp> | |
28 | ||
29 | #include <boost/bimap/detail/is_set_type_of.hpp> | |
30 | ||
31 | namespace boost { | |
32 | namespace bimaps { | |
33 | ||
34 | template< class Type > | |
35 | struct with_info | |
36 | { | |
37 | typedef Type value_type; | |
38 | }; | |
39 | ||
40 | namespace detail { | |
41 | ||
42 | /// \brief Metafunction to check if a given type is a data_hook specification. | |
43 | ||
44 | template< class Type > | |
45 | struct is_with_info : ::boost::mpl::false_ {}; | |
46 | ||
47 | template< class ValueType > | |
48 | struct is_with_info< with_info<ValueType> > : ::boost::mpl::true_ {}; | |
49 | ||
50 | /** \struct boost::bimaps::detail::manage_additional_parameters | |
51 | \brief Utility class to extract the additional parameters from the template parameters. | |
52 | ||
53 | \code | |
54 | template< class AP1, class AP2, class AP3 > | |
55 | struct manage_additional_parameters | |
56 | { | |
57 | struct parameters | |
58 | { | |
59 | typedef -unspecified- set_type_of_relation; | |
60 | typedef -unspecified- data_hook; | |
61 | typedef -unspecified- allocator; | |
62 | }; | |
63 | ||
64 | typedef parameters type; | |
65 | }; | |
66 | \endcode | |
67 | ||
68 | See also bimap, bimap_core. | |
69 | **/ | |
70 | ||
71 | #ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
72 | ||
73 | template< class AP1, class AP2, class AP3 > | |
74 | struct manage_additional_parameters | |
75 | { | |
76 | // (1) manage_additional_parameters< | |
77 | // not_specified,not_specified,not_specified> | |
78 | // | |
79 | // set_type_of_relation: based on the left key type | |
80 | // info_hook: no additional info | |
81 | // allocator: default allocator | |
82 | ||
83 | struct case_NNN | |
84 | { | |
85 | typedef left_based set_type_of_relation; | |
86 | typedef std::allocator<void> allocator; | |
87 | typedef ::boost::mpl::na additional_info; | |
88 | }; | |
89 | ||
90 | // (2) manage_additional_parameters<Allocator,not_specified,not_specified> | |
91 | // | |
92 | // set_type_of_relation: based on the left key type | |
93 | // info_hook: no additional info | |
94 | // allocator: Allocator | |
95 | ||
96 | struct case_ANN | |
97 | { | |
98 | typedef left_based set_type_of_relation; | |
99 | typedef AP1 allocator; | |
100 | typedef ::boost::mpl::na additional_info; | |
101 | }; | |
102 | ||
103 | // (3) manage_additional_parameters< | |
104 | // SetOfRelationType,not_specified,not_specified> | |
105 | // | |
106 | // set_type_of_relation: SetTypeOfRelation | |
107 | // info_hook: no additional info | |
108 | // allocator: default allocator | |
109 | ||
110 | struct case_SNN | |
111 | { | |
112 | typedef AP1 set_type_of_relation; | |
113 | typedef std::allocator<void> allocator; | |
114 | typedef ::boost::mpl::na additional_info; | |
115 | }; | |
116 | ||
117 | // (4) manage_additional_parameters< | |
118 | // SetTypeOfRelation,Allocator,not_specified> | |
119 | // | |
120 | // set_type_of_relation: SetTypeOfRelation | |
121 | // info_hook: no additional info | |
122 | // allocator: Allocator | |
123 | ||
124 | struct case_SAN | |
125 | { | |
126 | typedef AP1 set_type_of_relation; | |
127 | typedef AP2 allocator; | |
128 | typedef ::boost::mpl::na additional_info; | |
129 | }; | |
130 | ||
131 | // (5) manage_additional_parameters<InfoToHook,not_specified,not_specified> | |
132 | // | |
133 | // set_type_of_relation: based on the left key type | |
134 | // info_hook: InfoToHook | |
135 | // allocator: default allocator | |
136 | ||
137 | struct case_HNN | |
138 | { | |
139 | typedef left_based set_type_of_relation; | |
140 | typedef std::allocator<void> allocator; | |
141 | typedef BOOST_DEDUCED_TYPENAME AP1::value_type additional_info; | |
142 | }; | |
143 | ||
144 | // (6) manage_additional_parameters< | |
145 | // SetTypeOfRelation,InfoToHook,not_specified> | |
146 | // | |
147 | // set_type_of_relation: SetTypeOfRelation | |
148 | // info_hook: InfoToHook | |
149 | // allocator: default allocator | |
150 | ||
151 | struct case_SHN | |
152 | { | |
153 | typedef AP1 set_type_of_relation; | |
154 | typedef std::allocator<void> allocator; | |
155 | typedef BOOST_DEDUCED_TYPENAME AP2::value_type additional_info; | |
156 | }; | |
157 | ||
158 | // (7) manage_additional_parameters< | |
159 | // DataToHook,Allocator,not_specified> | |
160 | // | |
161 | // set_type_of_relation: SetTypeOfRelation | |
162 | // info_hook: InfoToHook | |
163 | // allocator: default allocator | |
164 | ||
165 | struct case_HAN | |
166 | { | |
167 | typedef left_based set_type_of_relation; | |
168 | typedef AP2 allocator; | |
169 | typedef BOOST_DEDUCED_TYPENAME AP1::value_type additional_info; | |
170 | }; | |
171 | ||
172 | // (8) manage_additional_parameters< | |
173 | // SetTypeOfRelation,DataToHook,Allocator> | |
174 | // | |
175 | // set_type_of_relation: SetTypeOfRelation | |
176 | // info_hook: InfoToHook | |
177 | // allocator: Allocator | |
178 | ||
179 | struct case_SHA | |
180 | { | |
181 | typedef AP1 set_type_of_relation; | |
182 | typedef AP2 allocator; | |
183 | typedef BOOST_DEDUCED_TYPENAME AP2::value_type additional_info; | |
184 | }; | |
185 | ||
186 | // Some annidated mpl::if_ and we are done! | |
187 | ||
188 | typedef BOOST_DEDUCED_TYPENAME mpl::if_ | |
189 | < | |
190 | ::boost::mpl::is_na<AP1>, | |
191 | case_NNN, // (1) | |
192 | BOOST_DEDUCED_TYPENAME mpl::if_ | |
193 | < | |
194 | ::boost::mpl::is_na<AP2>, | |
195 | BOOST_DEDUCED_TYPENAME mpl::if_ | |
196 | < | |
197 | is_set_type_of_relation<AP1>, | |
198 | case_SNN, // (3) | |
199 | BOOST_DEDUCED_TYPENAME mpl::if_ | |
200 | < | |
201 | is_with_info<AP1>, | |
202 | case_HNN, // (5) | |
203 | case_ANN // (2) | |
204 | ||
205 | >::type | |
206 | ||
207 | >::type, | |
208 | BOOST_DEDUCED_TYPENAME mpl::if_ | |
209 | < | |
210 | ::boost::mpl::is_na<AP3>, | |
211 | BOOST_DEDUCED_TYPENAME mpl::if_ | |
212 | < | |
213 | is_with_info<AP1>, | |
214 | case_HAN, // (7) | |
215 | BOOST_DEDUCED_TYPENAME mpl::if_ | |
216 | < | |
217 | is_with_info<AP2>, | |
218 | case_SHN, // (6) | |
219 | case_SAN // (4) | |
220 | ||
221 | >::type | |
222 | ||
223 | >::type, | |
224 | ||
225 | case_SHA // (8) | |
226 | ||
227 | >::type | |
228 | ||
229 | >::type | |
230 | ||
231 | >::type type; | |
232 | ||
233 | }; | |
234 | ||
235 | #endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
236 | ||
237 | } // namespace detail | |
238 | } // namespace bimaps | |
239 | } // namespace boost | |
240 | ||
241 | ||
242 | #endif // BOOST_BIMAP_DETAIL_MANAGE_ADDITIONAL_PARAMETERS_HPP | |
243 |