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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 relation/support/get.hpp | |
10 | /// \brief get<tag>(r) function | |
11 | ||
12 | #ifndef BOOST_BIMAP_RELATION_SUPPORT_GET_HPP | |
13 | #define BOOST_BIMAP_RELATION_SUPPORT_GET_HPP | |
14 | ||
15 | #if defined(_MSC_VER) | |
16 | #pragma once | |
17 | #endif | |
18 | ||
19 | #include <boost/config.hpp> | |
20 | ||
21 | #include <boost/bimap/relation/support/value_type_of.hpp> | |
22 | ||
23 | #include <boost/bimap/relation/detail/access_builder.hpp> | |
24 | ||
25 | #include <boost/mpl/if.hpp> | |
26 | #include <boost/type_traits/is_same.hpp> | |
27 | #include <boost/type_traits/is_const.hpp> | |
28 | ||
29 | #ifdef BOOST_BIMAP_ONLY_DOXYGEN_WILL_PROCESS_THE_FOLLOWING_LINES | |
30 | ||
31 | ||
32 | namespace boost { | |
33 | namespace bimaps { | |
34 | namespace relation { | |
35 | namespace support { | |
36 | ||
37 | /** \brief Gets a pair view of the relation. | |
38 | ||
39 | \ingroup relation_group | |
40 | **/ | |
41 | ||
42 | template< class Tag, class SymmetricType > | |
43 | BOOST_DEDUCED_TYPENAME result_of::get<Tag,SymmetricType>::type | |
44 | get( SymmetricType & ); | |
45 | ||
46 | } // namespace support | |
47 | } // namespace relation | |
48 | } // namespace bimaps | |
49 | } // namespace boost | |
50 | ||
51 | #endif // BOOST_BIMAP_ONLY_DOXYGEN_WILL_PROCESS_THE_FOLLOWING_LINES | |
52 | ||
53 | ||
54 | ||
55 | #ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
56 | ||
57 | namespace boost { | |
58 | namespace bimaps { | |
59 | namespace relation { | |
60 | namespace support { | |
61 | ||
62 | // Since it is very error-prone to directly write the hole bunch | |
20effc67 | 63 | // of relation accesor. They are built from little macro blocks that |
7c673cae | 64 | // are both more readable, leading to self docummenting code and a |
20effc67 | 65 | // lot more easier to understand and maintain. |
7c673cae FG |
66 | // It is very important to note that the three building blocks have |
67 | // to laid in the same namespace in order to work. There is also | |
68 | // important to keep them in order. | |
20effc67 | 69 | // The forward declaration are not necessary but they help a lot to |
7c673cae FG |
70 | // the reader, as they undercover what is the signature of the |
71 | // result code. | |
72 | // In the end, it is not quicker to do it in this way because you | |
73 | // write a lot. But this code has no complexity at all and almost | |
74 | // every word writed is for documentation. | |
75 | ||
76 | // Result of | |
77 | // ------------------------------------------------------------------------- | |
78 | /* | |
79 | namespace result_of { | |
80 | ||
81 | template< class Tag, class Relation > | |
82 | struct get<Tag,Relation>; | |
83 | { | |
84 | typedef -unspecified- type; | |
85 | }; | |
86 | ||
87 | } // namespace result_of | |
88 | ||
89 | */ | |
90 | ||
91 | BOOST_BIMAP_SYMMETRIC_ACCESS_RESULT_OF_BUILDER | |
92 | ( | |
93 | get, | |
94 | value_type_of | |
95 | ) | |
96 | ||
97 | ||
98 | ||
99 | // Implementation | |
100 | // ------------------------------------------------------------------------- | |
101 | ||
102 | BOOST_BIMAP_SYMMETRIC_ACCESS_IMPLEMENTATION_BUILDER | |
103 | ( | |
104 | get, | |
105 | SymmetricType, | |
106 | st, | |
107 | return st.get_left(), | |
108 | return st.get_right() | |
109 | ) | |
110 | ||
111 | namespace detail { | |
112 | ||
113 | template< class SymmetricType > | |
114 | BOOST_DEDUCED_TYPENAME result_of::get< | |
115 | ::boost::bimaps::relation::member_at::info, SymmetricType >::type | |
116 | get(::boost::bimaps::relation::member_at::info, SymmetricType & rel) | |
117 | { | |
118 | return rel.info; | |
119 | } | |
120 | ||
121 | } // namespace detail | |
122 | ||
123 | // Interface | |
124 | //---------------------------------------------------------------------------- | |
125 | ||
126 | BOOST_BIMAP_SYMMETRIC_ACCESS_INTERFACE_BUILDER | |
127 | ( | |
128 | get | |
129 | ) | |
130 | ||
131 | ||
132 | } // namespace support | |
133 | } // namespace relation | |
134 | } // namespace bimaps | |
135 | } // namespace boost | |
136 | ||
137 | #endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
138 | ||
139 | #endif // BOOST_BIMAP_RELATION_SUPPORT_GET_HPP | |
140 |