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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 tags/support/is_tagged.hpp | |
10 | /// \brief type_traits extension | |
11 | ||
12 | #ifndef BOOST_BIMAP_TAGS_SUPPORT_IS_TAGGED_HPP | |
13 | #define BOOST_BIMAP_TAGS_SUPPORT_IS_TAGGED_HPP | |
14 | ||
15 | #if defined(_MSC_VER) | |
16 | #pragma once | |
17 | #endif | |
18 | ||
19 | #include <boost/config.hpp> | |
20 | ||
21 | #include <boost/mpl/bool.hpp> | |
22 | #include <boost/bimap/tags/tagged.hpp> | |
23 | ||
24 | /** \struct boost::bimaps::tags::support::is_tagged | |
25 | \brief Type trait to check if a type is tagged. | |
26 | ||
27 | \code | |
28 | template< class Type > | |
29 | struct is_tagged | |
30 | { | |
31 | typedef {mpl::true_/mpl::false_} type; | |
32 | }; | |
33 | \endcode | |
34 | ||
35 | See also tagged. | |
36 | **/ | |
37 | ||
38 | #ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
39 | ||
40 | namespace boost { | |
41 | namespace bimaps { | |
42 | namespace tags { | |
43 | namespace support { | |
44 | ||
45 | ||
46 | // is_tagged metafunction | |
47 | ||
48 | template< class Type > | |
49 | struct is_tagged : | |
50 | ::boost::mpl::false_ {}; | |
51 | ||
52 | template< class Type, class Tag > | |
53 | struct is_tagged< tagged< Type, Tag > > : | |
54 | ::boost::mpl::true_ {}; | |
55 | ||
56 | } // namespace support | |
57 | } // namespace tags | |
58 | } // namespace bimaps | |
59 | } // namespace boost | |
60 | ||
61 | #endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES | |
62 | ||
63 | #endif // BOOST_BIMAP_TAGS_SUPPORT_IS_TAGGED_HPP | |
64 |